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Tytuł:
Hildebrandts theorem for the essential spectrum
Autorzy:
Bracic, J.
Diogo, C.
Powiązania:
https://bibliotekanauki.pl/articles/255837.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
essential spectrum
Hildebrandt's theorem
essential numerical range
Opis:
We prove a variant of Hildebrandt's theorem which asserts that the convex hull of the essential spectrum of an operator A on a complex Hilbert space is equal to the intersection of the essential numerical ranges of operators which are similar to A. As a consequence, it is given a necessary and sufficient condition for zero not being in the convex hull of the essential spectrum of A.
Źródło:
Opuscula Mathematica; 2015, 35, 3; 279-285
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Essential facilities doctrine in European Union Law
Autorzy:
Zalewska, Marta
Powiązania:
https://bibliotekanauki.pl/articles/684885.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
European Union Law
American law
Essential facilities doctrine
Opis:
Formed at the end of the nineteenth century in the United States, the essential facilities doctrine was created to prevent the refusal of access to certain key equipment, which is used as an instrument to secure the dominant position of the undertaking in those markets where the emergence of competition is strictly related to obtaining access to key device. The author describes the initiation in the 1970’s of the acquisition of the American doctrine by European Union law by focusing on the role of the European Commission and the Court of Justice of the European Union in this process. Both American and European prsemises for an application of the essential facilities doctrine are presented, as well as its advantages and disadvantages.
Źródło:
Adam Mickiewicz University Law Review; 2013, 2; 167-183
2450-0976
Pojawia się w:
Adam Mickiewicz University Law Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On finite functions with non-trivial arity gap
Autorzy:
Shtrakov, Slavcho
Koppitz, Jörg
Powiązania:
https://bibliotekanauki.pl/articles/729003.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
essential variable
identification minor
essential arity gap
Opis:
Given an n-ary k-valued function f, gap(f) denotes the minimal number of essential variables in f which become fictive when identifying any two distinct essential variables in f.
We particularly solve a problem concerning the explicit determination of n-ary k-valued functions f with 2 ≤ gap(f) ≤ n ≤ k. Our methods yield new combinatorial results about the number of such functions.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2010, 30, 2; 217-245
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On essential cluster sets
Autorzy:
Mukhopadhyay, S.
Powiązania:
https://bibliotekanauki.pl/articles/1376307.pdf
Data publikacji:
1973
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Fundamenta Mathematicae; 1973, 79, 2; 159-171
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected commodity characteristics of essential oils used for healing purposes
Autorzy:
Radziejowska, Maria
Niciejewska, Marta
Powiązania:
https://bibliotekanauki.pl/articles/23944774.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
aromatherapy
method of extracting essential oils
labeling of essential oils packaging
aromaterapia
metoda ekstrakcji olejków eterycznych
opakowania
olejki eteryczne
Opis:
The use of an essential oil with a therapeutic purpose depends on many conditions. First of all, only substances whose quality meets the guidelines of the modern, current Polish standard PN-EN ISO 9235: 2021-12 (ICS 71.100.60 - Essential oils) and which are classified as essential oils can be used in aromatherapy, i.e. for therapeutic purposes. A very important role in obtaining essential oils of high therapeutic quality is played by the place and method of cultivation of the plant from which the oil is extracted, safety in maintaining the purity of the essential oil during its extraction, and compliance with the special requirement to label the essential oil package. Fragrance, synthetic and natural oils do not meet these requirements and cannot be used for therapeutic purposes.
Źródło:
System Safety : Human - Technical Facility - Environment; 2022, 4, 1; 170-178
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methodology of conformity assessment with the essential requirements for electrotechnical products
Autorzy:
Małysa, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2064805.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
conformity assessment methodology
essential requirements
electrotechnical products
Opis:
The article presents a methodical approach to conformity assessment related to the introduction, putting into service on the European market of electrical or electrotechnical products. The developed methodology can be an effective control tool, allowing to assess whether all activities within the conformity assessment performed by the manufacturer have been carried out. The aim of the study is to present the possibility of adapting the developed methodology of approach to the assessment of compliance with the essential requirements in industrial conditions. In the case of the industry being analyzed, the basis for conformity assessment is the requirements set out in the New Approach Directives. The essential requirements set out in New Approach Directives must be met if the product is placed on the market or putting into service. The article presents the implementation of the conformity assessment process based on harmonized standards with the directives related to the product in question. The application of harmonized standards in the conformity assessment process allowed the manufacturer to use the so-called principles of presumption of conformity, referred to in the Act on conformity assessment systems and market surveillance.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 265--273
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antifungal activity of PLA foils covered with ethylocelulose containing essential oils
Autorzy:
Łopusiewicz, Łukasz
Mizielińska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1113918.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
active coatings
antifungal properties
essential oils
Opis:
The purpose of the research work was to examine the antifungal properties of cumin, rosemary and fennel essential oils. The goal of the study was also to determine antifungal activity of coatings containing the essential oils. The results of the study demonstrated that cumin, rosemary and fennel essential oils exhibited antifungal properties. The most sensitive strains were Botrytis cinerea and Mucor circinelloides. The cumin oil was found to be the most active. The growth of Botrytis cinerea and Mucor circinelloides was not observed even on medium containing 0.1% of cumin oil. The growth of Aspergillus niger, Aspergillus clavatus and Rhizopus oryzae was not noticed on mediums containig 0.5% of the oil. The similar results were obtained for fennel essential oil. 0.5% concentration of the oil in medium inhibited the growth of Botrytis cinerea, Mucor circinelloides, Aspergillus clavatus, Rhizopus oryzae. The rosemary oil did not inhibited the growth of fungi strains in concentration of 0,1%.
Źródło:
World News of Natural Sciences; 2017, 12; 27-32
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of water on the estimation of antioxidant properties of essential oils
Autorzy:
Olszowy, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/764073.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
antioxidant activity
essential oils
water impact
Opis:
This study discusses the influence of water content in measuring system on the estimation of antioxidant activity of essential oils. The presented data show that the antioxidant activity of thyme, clove, summer savory and basil essential oils strongly depends on water concentration what has important impact on the estimation of correct and reliable antioxidant activity of examined essential oils.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2015, 70, 2
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inhibitory activities of essential oils against Babesia canis
Autorzy:
Guz, L.
Ziętek, J.
Puk, K.
Adaszek, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/2087360.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Babesia canis
essential oil
natural product
Źródło:
Polish Journal of Veterinary Sciences; 2020, 23, 1; 161-163
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strong essential cluster sets.
Autorzy:
O'Malley, Richard
Powiązania:
https://bibliotekanauki.pl/articles/1377242.pdf
Data publikacji:
1973
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Fundamenta Mathematicae; 1973, 78, 1; 37-42
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular basis of essential thrombocythaemia in humans and dogs - a review
Autorzy:
Padzik, N.
Szewczuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/2119549.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Zootechniczne
Tematy:
myeloproliferative syndromes
JAK2-V617F
essential thrombocythaemia
Opis:
A potential cause of essential thrombocythaemia can be seen as the V617F point mutation within Janus kinase 2. This mutation occurs in 60-70% of patients with this disease and is located in the domain acting as an inhibitor. It increases the enzymatic activity of JAK2 kinase and induces intensified sensitivity of cells to cytokines. Identification of mutations in the JAK2 gene has made it possible to describe the molecular pathogenesis of myeloproliferative syndromes, which has enabled more accurate diagnosis and assisted in effective treatment. The significant similarity of the clinical, laboratory and morphological features of myeloproliferative syndromes (including essential thrombocythaemia) in animals and humans suggests that common signalling pathways within the JAK2 gene may be involved in the development of these diseases.
Źródło:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego; 2021, 17, 1; 13-21
1733-7305
Pojawia się w:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intersection of essential cluster sets
Autorzy:
Layek, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/715493.pdf
Data publikacji:
1983
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Annales Polonici Mathematici; 1983, 41, 1; 49-55
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preservative potential of cumin essential oil for Pisum sativum L. during storage
Autorzy:
Kumar, N.
Powiązania:
https://bibliotekanauki.pl/articles/66274.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cumin
Cuminum cyminum
essential oil
Pisum sativum
pea
seed
storage
pest
Opis:
The samples of stored seeds of pea (Pisum sativum L.) were collected from 30 farmer markets. The mycobiota analysis showed presence of 15 fungal species and one species of insect Callosobruchus chinensis. The fungi such as Aspergillus flavus, A. niger, A. ochraceous, A. terreus were found to be dominant based on percent frequency of each in blotter method in unsterilized and sterilized seeds 18.9–7.9, 15.0–3.9, 12.2–3.7, 10.1–1.7, respectively, and in agar plate technique 17.9–8.3, 15.1–9.5, 12.8–5, 7.9.7–6.7, respectively. These species showed reduction in terms of weight loss, germination and protein content in pathogenicity testing. Essential oil extracted by hydrodistillation from fruits of Cuminum cyminum L. was evaluated against the most common occurring funi such as A. flavus and A. niger as well as the insect species C. chinensis and the oil exhibited high toxicity. The oil killed the tested fungi and showed thermostable nature at its minimum inhibitory concentration (MIC) of 400 ppm. The oil safely preserved pea seeds up to 120 days at 0.50 (1,000 ppm) and 0.76 ml (1,500 ppm) in polyethylene and jute bags of 500 ml capacity containing 400 g seeds separately. There were no changes in organoleptic appereance of food seeds during storage. The oil has beneficial effect on number of visible nodule formation and shoot and root dry biomass of 15-day-old plants in comparison to control sets. The cumin oil was analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS).
Źródło:
Journal of Plant Protection Research; 2016, 56, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-babesial potential and chemical composition of essential oil from yarrow Achillea millefolium
Autorzy:
Guz, L.
Wawrzykowski, J.
Adaszek, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/2087200.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Achillea millefolium
anitbabesial activity
essential oil
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 1; 79-84
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of fungistatic properties of selected essential oils obtained from the Lamiaceae family plants
Autorzy:
Andres, Bogusław
Betlej, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/2200513.pdf
Data publikacji:
2019
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
essential oil
natural wood preservatives
Coniophora puteana
Opis:
Evaluation of fungistatic properties of selected essential oils obtained from plants from the Lamiaceae spp. The paper presents the results of research on fungistatic properties of selected essential oils from plants from the Lamiaceae spp. against the fungus Coniophora puteana. The influence of solutions of essential oils has been analyzed: mint, rosemary and thyme on the growth was analyzed. It has been shown that essential oils have fungistatic properties.
Ocena właściwości fungistatycznych wybranych olejków eterycznych pozyskanych z roślin z rodziny Lamiaceae. W artykule przedstawiono wyniki badań właściwości fungistatycznych wybranych olejków eterycznych roślin z rodziny Lamiaceae wobec grzyba Coniophora puteana. Przeanalizowano wpływ roztworów olejków eterycznych: miętowego, rozmarynowego oraz tymiankowego na wzrost grzybni. Wykazano, że olejki eteryczne posiadają właściwości fungistatyczne.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2019, 105; 30--37
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isobolographic in vitro interactions of fluconazole with citrus essential oils against Cladosporium cladosporioides
Autorzy:
Wroblewska-Luczka, P.
Powiązania:
https://bibliotekanauki.pl/articles/2098240.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
fluconazole
essential oil
in vitro interaction
isobolographic analysis
Cladosporium cladosporioides
Opis:
Introduction. Cladosporium is one of the most abundant genera of environmental fungi worldwide and a very common respiratory allergen. To-date, many C. cladosporoides infections have been identified. Risk factors for C. cladosporioides infection are primarily injuries, metabolic disorders, organ transplantation and autoimmune diseases, among others. Objective. The aim of the study was to assess the type of pharmacodynamic interactions between fluconazole and some selected essential oils: orange, mandarin, lemon and grapefruit, in an in vitro study against C. cladosporioides. Materials and method. Experiments were carried out using the plate cultivation method. Fluconazole was tested against C. cladosporioides at concentrations ranging from 0.05–3.3 mg / ml, and the activity of essential oils added to PDA medium at concentrations ranging from 1–30%. The dose-effect curves for the collected results were determined with by the log- probit method. Isobolographic analysis of the results allowed determining the type of interactions between fluconazole and the tested essential oils. Results. Lemon essential oil was the most active, and in a concentration of 1% it inhibited the growth of C. cladosporioides by 21%. Isobolographic analysis showed that the combination of fluconazole with orange and grapefruit essential oil had an additive interaction, and with mandarin and lemon – an additive interaction with a tendency to synergy in the plate culture test for C. cladosporioides. Conclusions. The use of isobolographic analysis can contribute to the introduction of natural substances with the desired activities into the pharmacotherapy of many infections and diseases. The use of natural substances can also help to reduce the number of side-effects caused by conventional and standard therapies.
Źródło:
Journal of Pre-Clinical and Clinical Research; 2021, 15, 1; 15-19
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of different harvest periods on essential oil components of Lippia citriodora Kunth under semi-arid climatic conditions and biological activities of its essential oil
Autorzy:
Kizil, S.
Dinc, H.
Diraz, E.
Toncer, O.
Kizil, M.
Karaman, S.
Powiązania:
https://bibliotekanauki.pl/articles/12189404.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
Turkey
plant cultivation
lemon verbena
Lippia citriodora
medicinal plant
harvest season
climate condition
semi-arid climate
essential oil
essential oil component
biological activity
Opis:
Lemon verbena is cultivated mainly due to the lemon-like aroma emitted from its leaves that are utilized for most purposes. The chemical composition of the essential oil of lemon verbena was analyzed by GC/MS in July at pre flowering, in September at full flowering and in end of October at post flowering period. The in vitro antimicrobial activity of the essential oil, extracted from Lippia citriodora was tested against laboratory control strains belonging to the American Type Culture Collection (Maryland, USA) four Gram (+) and Gram (-) bacteria using the disc diffusion test. Antioxidant activity of the sample was determined by 1,1-diphenil-2- -picrly-hydrazil (DPPH) assay. Well-known antioxidant compounds such as ascorbic acid and α-tocopherol were used as standard. Results showed, among different harvest periods high fresh and dry herbage and dry leaf yields per plant were obtained from full flowering stage. Harvest periods were found to have a significant effect on the content of essential oil and the highest amounts of limonene, neral and geranial and measured as 31.15, 11.92 and 15.53%, respectively at full flowering stage. In all samples, the main constituents were limonene, neral and geranial constituting 46.03%–58.59% of the total essential oil yield depend on development stages. Lemon verbena essential oil was found to have antibacterial activity especially against Gram (+) microorganisms. In DPPH system, the moderate radical scavenging activity was exhibited. Therefore, L. citriodora has potential to be used as a natural antioxidant and antimicrobial agent in food processing.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 2; 39-48
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spin trapping studies of essential oils in lipid systems
Autorzy:
Makarova, K.
Drązikowska, K.
Suska, B.
Zawada, K.
Wawer, I.
Powiązania:
https://bibliotekanauki.pl/articles/147786.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
spin trapping ESR
essential oils
DFT calculations
lipids
Opis:
In the present work, we report the results of a spin trapping ESR study of four essential oils widely used for skin care products such as creams and bath salts. The studied essential oils are Rosmarini aetheroleum (rosemary), Menthae piperitae aetheroleum (mint), Lavandulae aetheroleum (lavender), and Thymi aetheroleum (thyme). Fenton reaction in the presence of ethanol was used to generate free radicals. The N-tert- -butyl-α-phenylnitrone (PBN) was used as a spin trap. In the Fenton reaction, the rosemary oil had the lowest effect on radical adduct formation as compared to the reference Fenton system. Since essential oils are known to be lipid soluble, we also conducted studies of essential oils in Fenton reaction in the presence of lipids. Two model lipids were used, namely 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) and 1,2-dipalmitoyl-sn- -glycero-3-phosphocholine (DPPC). The obtained results suggested that in the presence of DOPC lipids, the •OH and PBN/•CHCH3(OH) radicals are formed in both phases, that is, water and lipids, and all the studied essential oils affected the Fenton reaction in a similar way. Whereas, in the DPPC system, the additional type of PBN/X (aN = 16.1 G, aH = 2.9 G) radical adduct was generated. DFT calculations of hyperfi ne splittings were performed at B3LYP/6-311+G(d,p)/EPR-II level of theory for the set of c-centered PBN adducts in order to identify PBN/X radical.
Źródło:
Nukleonika; 2015, 60, No. 3, part 1; 461-468
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical Composition and Antibacterial activity of Essential Oil of Marrubium vulgare from Eastern Algeria
Autorzy:
Abadi, A.
Hassani, A.
Powiązania:
https://bibliotekanauki.pl/articles/411975.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Marrubium vulgare
Essential oil composition
GC-MS
antibacterial activities
Opis:
The essential oil from flowering Marrubium (Marrubium vulgare L.) an aromatic member of the Lamiaceae family, from Algeria, obtained by hydrodistillation, was analysed by GC/FID and GC/MS. The constituents were identified by their mass spectra and Kovats’ indices. Fivety (50) components in the oil of M. vulgare were identified. The results demonstrated that the major components of the essential oil were: 4,8,12,16-Tetramethyl heptadecan-4-olid (16.97 %), Germacrene D-4-ol (9.61 %), α- pinéne (9.37 %), Phytol (4.87 %), Dehydro-sabina ketone (4.12 %), Piperitone (3.27 %), δ-Cadinene (3.13 %), 1-Octen-3-ol (2.35 %) and Benzaldehyde (2.31 %). Essential oil of M vulgare was evaluated for its antibacterial activities against Gram-positive and Gram negative pathogenic bacteria: Bacillus subtilis, Micrococcus luteus, Escherichia coli and Klebsiella pneumoniae.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 10, 1; 61-69
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of distillation time and distillation apparatus on the chemical composition and quality of Lavandula angustifolia Mill. essential oil
Autorzy:
Wesołowska, Aneta
Jadczak, Dorota
Zyburtowicz, Karolina
Powiązania:
https://bibliotekanauki.pl/articles/27315651.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Lavandula angustifolia essential oil
distillation time
distillation apparatus
GC-MS
gas chromatography-mass spectrometry
quality of lavender essential oil
Opis:
In the study, the influence of distillation time as well as distillation apparatus on the chemical composition and quality of lavender (Lavandula angustifolia Mill.) essential oil were investigated. Two different types of distillation apparatuses: Deryng (popular in Poland) and Clevenger-type (recommended by European Pharmacopoeia) were used for the isolation of the essential oil from dried lavender flowers (Lavandulae flos). Moreover, different distillation times (2, 3 and 4 hours) were also applied. The chemical composition of the isolated oils, determined by gas chromatography coupled with mass spectrometry (GC-MS), revealed the dominance of linalool (11.55–17.19%) and linalyl acetate (12.84–16.78%) in the all analyzed samples. Other important constituents were: caryophyllene oxide (5.66–7.35%), lavandulyl acetate (4.64–5.40%) and borneol (4.62–5.51%). On the basis of the obtained data it was proved that the distillation time and distillation apparatus affect the amounts of some constituents in the lavender oil.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 4; 36--43
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interactions between Clotrimazole and selected essential oils against Malassezia pachydermatis clinical isolates
Autorzy:
Bohmova, E.
Conkova, E.
Harcarova, M.
Sihelska, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2087584.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
antimycotic
antifungal
synergism
clotrimazole
essential oil
checkerboard
Źródło:
Polish Journal of Veterinary Sciences; 2019, 1; 173-175
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficacy of fungicides and essential oils against bacterial diseases of fruit trees
Autorzy:
Mikicinski, A.
Sobiczewski, P.
Berczynski, S.
Powiązania:
https://bibliotekanauki.pl/articles/66389.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fungicide
essential oil
bacterial disease
plant disease
fruit tree
Opis:
In the framework of the performed studies, the antibacterial activity of the following fungicides was evaluated: Miedzian 50 WG (active substance - a.s. 50% copper oxychloride), Ridomil MZ Gold 68 WG (a.s. 3.8% metalaxyl-M and 64%, mancozeb), Euparen Multi 50 WG (a.s. 50% tolylfluanid), Captan 80 WG [a.s. 80% N-(captan)], Dithane Neotec 75 WG (a.s. 75% mancozeb). The evaluation also concerned the essential oils: lavender, sage, lemon balm, clove, and a preparation based on thyme oil (BioZell). Each preparation and compound was tested against the following bacterial pathogens: Erwinia amylovora, Xanthomonas arboricola pv. corylina, X. arboricola pv. juglandis, Pseudomonas syringae pv. syringae, Agrobacterium tumefaciens (presently Rhizobium radiobacter). Each preparation and compound was tested at a concentration of 1,000 ppm of active substance. Copper oxychloride was also tested at a concentration of 1,500 ppm. Among the tested fungicides, metalaxyl-M with mancozeb, mancozeb alone, and copper oxychloride inhibited all of the tested strains of pathogenic bacteria. Tolylfluanid did not inhibit any of the bacteria used. Out of the investigated essential oils, the strongest inhibitors of bacteria were: sage, cloves, and BioZell. The protective activity of the above mentioned fungicides was also evaluated in vivo. They were assessed against fire blight on apple blossoms and pear fruitlets, against bacterial canker on sweet cherry fruitlets, and against crown gall on sunflower seedlings (the test plant). All fungicides were applied at the same concentrations as those in the in vitro tests. Only copper oxychloride was found to show protective activity against the studied diseases. This result indicates that the antibacterial properties of the other fungicides did not correspond with their activity on the plant organs used in the in vivo experiment.
Źródło:
Journal of Plant Protection Research; 2012, 52, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of SPE for selective fractionation of essential oils constituents from plant materials
Autorzy:
Szewczyk, Joanna
Dybowski, Michał P.
Dawidowicz, Andrzej L.
Powiązania:
https://bibliotekanauki.pl/articles/764050.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
SPE
essential oils from herbs
fractionation
Opis:
Solid-phase extraction (SPE) is simple and inexpensive sample preparation procedure which can be applied for the isolation/fractionation of essential oil compounds from wide variety of samples, such as foodstuffs, biological and environmental. Due to the complex nature of the examined matrices and frequently low concentration level of target components, analytical procedures require the use of initial sample preparation stage. The paper shows the possibility of essential oil components fractionation from different plant materials using SPE method. The results presented in this paper shows that the proposed SPE procedure allows for easy and total fractionation of essential oil constituents (especially low-molecular oxygen compounds) from the sample matrix.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2015, 70, 2
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antifungal Activity of Finished Chromium Tanned Leather Containing Thyme and Tea Tree Essential Oils
Autorzy:
Gendaszewska, Dorota
Wionczyk, Barbara
Bednarek, Agata
Boniecki, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2172003.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
essential oil
antifungal activity
leather
microorganisms
Opis:
Leather products provide an ideal environment for microbial growth. In order to prevent the appearance and spread of various types of microorganisms, it is treated with selected biocides and even essential oils. The aim of this paper was to investigate the antifungal activity of selected essential oils applied to finished chromium tanned leather which is intended for leather fancy products. Antifungal activity was evaluated according to the PN-EN 14119: 2005 standard. Four finished chromium tanned leathers were tested, each of which was soaked in the following essential oils: tea tree essential oil at a concentration of 1, 2 and 5% and thyme essential oil at concentration of 1, 2 and 5%. The results obtained indicated that leather finishing with thyme essential oil showed the antimicrobial activity against Aspergillus niger, Chaetomium globosum and Candida albicans strains. The application of 5% thyme essential oil to leather samples inhibited the growth of all strains tested. Using tea tree essential oil on leather samples showed a antimicrobial effect only against Candida albicans. The application of essential oils in the leather finishing process may be an alternative to biocides used in the tanning industry.
Źródło:
Fibres & Textiles in Eastern Europe; 2022, 3 (151); 41--45
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Essential oil composition and antioxidant activity of Marrubium vulgare L. growing wild in Eastern Algeria
Autorzy:
Abadi, A.
Hassani, A.
Powiązania:
https://bibliotekanauki.pl/articles/412455.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Marrubium vulgare
Lamiaceae
Essential oil composition
GC
GC-MS
antioxidant
Opis:
In previous work [1], the essential oil of the aerial parts of Marrubium vulgare L. obtained by hydrodistillation was analysed by gas chromatography coupled to mass spectrometry (GC-MS) in order to determine their chemical composition. Fifty (50) components in the oil of M. vulgare were identified. The results demonstrated that the major components of the essential oil were: 4,8,12,16-Tetramethyl heptadecan-4-olid (16.97 %), Germacrene D-4-ol (9.61 %), α- pinéne (9.37 %), Phytol (4.87 %), Dehydro-sabina ketone (4.12 %), Piperitone (3.27 %), δ-Cadinene (3.13 %), 1-Octen-3-ol (2.35 %) and Benzaldehyde (2.31 %). In this study, the antioxidant properties of essential oil were examined. The results showed that this oil can be considered an effective source of antioxidants of natural origin. This is the first report on chemical composition of M. vulgare essential oil cultivated in Algeria and the original study on the antioxidant activity of M. vulgare essential oil. The antioxidant activity was investigated with one method: 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging method.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 9, 1; 17-24
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conception, Connotation, and Essential Predication: Peter Auriol’s Conceptualism to the Test in II Sententiarum, d. 9, q. 2, art. 1
Autorzy:
Fornasieri, Giacomo
Powiązania:
https://bibliotekanauki.pl/articles/1621436.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
Peter Auriol
Connotation
Essential Predication
Conceptualism
Opis:
This paper comprises two parts. The first part is an introduction to Auriol’s moderate conceptualism, as it is presented in his Commentary on Book II of the Sentences, distinction 9, question 2, article 1. The second part is an edition of the text. In the introduction, I focus on Auriol’s use of the noetic tool of connotation. My thesis, in particular, is that connotation is a necessary prerequisite to his moderate conceptu alism. To this purpose, the first part of this introduction will be devoted to a brief presentation of Auriol’s conceptualism. In the second part, Auriol’s theory of essential predication will be presented. In the third part, I will present my claim that Auriol’s theory of essential predication can only be made sense of when read against the background of his theory of connotation as applied to intellectual cognition. Finally, I will offer a collation of Auriol’s Commentary on Book II of the Sentences, dis tinction 9, question 2, article 1, obtained by collating eight manuscripts, which hand down Auriol’s text, that is, Firenze, Biblioteca nazionale centrale, ms. Conv. Soppr. B.6.121, Firenze, ms. Conv. Soppr. A. 3.120, Napoli, Biblioteca nazionale, ms. VII.C.3, Padova, Biblioteca Antoniana, ms. 161, scaff. ix, Paris, Bibliothèque nationale de France, ms. latin 15867; Pelplin, Biblioteka Seminarium duchownego, ms. 46/85, Vaticano (Città del), Biblioteca Apostolica, ms. Borgiano 404, Vaticano (Città del), Biblioteca Apostolica, ms. Vat. lat. 942.
Źródło:
Analiza i Egzystencja; 2021, 54; 81-126
1734-9923
2300-7621
Pojawia się w:
Analiza i Egzystencja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Obowiązki małżeńskie : istotne i nieistotne
Obligazioni matrimoniali - essenziali e non essenziali
Autorzy:
Sztychmiler, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/663295.pdf
Data publikacji:
1998
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
istotny obowiązek małżeński
nieistotny obowiązek małżeński
obowiązek małżeński
essential conjugal duty
non-essential conjugal duty
conjugal duty
Opis:
Obbligazioni matrimoniali essenziali sono importanti nelle diversi piani di vita della Chiesa. Nel piano canonico importantissimo e divisione tra obligazioni essenziali e non essentiali. Necessaria è anche ricerca della conoscenza ed accettazione delle obbligazioni matrimoniali. Questo è condizineo della vera preparazione alla realizzazione delle obbligazioni matrimoniali. Sono importanti nella vita dei coniugi e nie processi di nullità del matrimonio. Distinzione tra obblighi essenziali e non essenziali è importante per                     i pastori delle Chiese, per iudici e altri cooperatori dei tribunali ecclesiastici.
Źródło:
Ius Matrimoniale; 1998, 9, 3; 115-134
1429-3803
2353-8120
Pojawia się w:
Ius Matrimoniale
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza olejku eterycznego z Galium aparine.
Analysis of essential oil of Galium aparine.
Autorzy:
Antoniak, Katarzyna
Dudek-Makuch, Marlena
Bylka, Wiesława
Powiązania:
https://bibliotekanauki.pl/articles/762669.pdf
Data publikacji:
2019-12-11
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
aktywność biologiczna
olejek eteryczny
Galium aparine
essential oils
biological activities
Opis:
Summary Galium aparine L. (clivers, goosegrass) (Rubiaceae) is used in folk medicine as diuretic and medicinal plant alleviating different dermatoses as psoriasis, seborrheic dermatitis, eczema, and improves the immune system. So far, scientific studies have shown as a main constituents: iridoids (mainly asperuloside), flavonoids (luteolin, chrysoeriol, apigenin and quercetin derivatives), numerous of phenolic acids and phytosterols. Previous studies confirmed antimicrobial, antioxidant and cytotoxic activity of clivers. The aim of this work was to investigate the chemical profile of essential oil isolated from G. aparine collected in Poland. The essential oil was extracted from the herb of G. aparine by hydrodistillation in Deryng-type apparatus and the volatile constituents were identified by gas chromatography coupled with mass spectrometry (GC-MS). 0,1 ml of essential oil (3,33 ml/kg) was obtained from the of G. aparine herb, in which 74 volatile ingredients were identified (100%). According to GC/MS analysis 9-diazo-9H-fluorene (31,93%), palmitic acid and dihomo-γ-linolenic acid (8,89%) were as major constituents. 9-diazo-9H-fluorene is very rare in the plant world, previously identified only in Bidens pilosa. Terpene compounds represented 22,31% of essential oil, including 15 sesquiterpenes (18,23%), 6 monoterpenes (2,00%) and 1 diterpene (3,08%). The other active ingredients of the oil include: phytol, β-ionone, anethole, spatulenol, α-cadinol, phenylethyl alcohol, eugenol, methyleugenol, α-carvacrol, α-caryophyllene, α-terpineol, isoaromadendren epoxide, carvone, linalool, santalol, β-farnesene and eucalyptole. The ingredients of the essential oil are multi-directional activity - anti-inflammatory, antimicrobial, anti-cancer, antiproliferative, effect on angiogenesis, and also have occlusive properties. Quantify and a number of ingredients of the essential oil have proven that it may be one of the bioactive important fractions of the clivers herb and partly justify the traditional use of G. aparine.
Streszczenie Galium aparine L. (przytulia czepna) (Rubiaceae) jest stosowana w medycynie ludowej jako diuretyk i środek łagodzący różne schorzenia skóry. W wyniku dotychczasowych badań stwierdzono, że głównymi związkami ziela są irydoidy, flawonoidy, kwasy fenolowe i fitosterole. Badania naukowe potwierdziły aktywność przeciwdrobnoustrojową, antyoksydacyjną i cytotoksyczną surowca. Celem naszych badań była analiza składników olejku lotnego otrzymanego z rosnącego w Polsce G. aparine. Olejek otrzymano metodą hydrodestylacji w aparacie Derynga, a jego skład analizowano metodą GC-MS. W efekcie otrzymano 0,1 ml olejku (3,33 ml/kg), w którym zidentyfikowano 74 składniki (100%). Dominującymi związkami były: 9-diazo-9H-fluoren (31,93%), który dotąd został wykryty jedynie w Bidens pilosa oraz kwasy palmitynowy i dihomo-γ-linolenowy (8,89%). Związki terpenowe, które stanowiły 22,31% olejku, reprezentowane były przez 15 seskwiterpenów (18,23%), 6 monoterpenów (2,00%) i 1 diterpen (3,08%). Ze względu na wykazaną w licznych pracach aktywność biologiczną, na uwagę zasługują takie składniki olejku, jak: fitol, β-jonon, anetol, spatulenol, α-kadinol, alkohol fenyloetylowy, eugenol, metyloeugenol, α-karwakrol, α-kariofilen, α-terpineol, epitlenek izoaromadendrenu, karwon, linalol, santalol, β-farnezen i eukaliptol. Zawartość oraz skład olejku otrzymanego z analizowanego przez nas surowca wskazuje, że może być jedną z istotnych frakcji czynnych surowca i częściowo uzasadniać tradycyjne zastosowanie G. aparine.
Źródło:
Farmacja Polska; 2019, 75, 10; 536-541
0014-8261
2544-8552
Pojawia się w:
Farmacja Polska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka folii otrzymywanych z biopolimerów z dodatkiem olejków eterycznych
Characteristics of biopolymer films with essential oils
Autorzy:
Jamróz, E.
Powiązania:
https://bibliotekanauki.pl/articles/947082.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
folie biopolimerowe
żelatyna
chitozan
olejki eteryczne
biopolymer films
gelatin
chitosan
essential oils
Opis:
Artykuł stanowi przegląd literatury dotyczącej wpływu olejków eterycznych na właściwości folii żelatynowych, chitozanowych oraz żelatynowo-chitozanowych. Folie biopolimerowe są tanie, biokompatybilne oraz funkcjonalne, a modyfikacja matrycy biopolimerowej olejkami eterycznymi o właściwościach przeciwbakteryjnych i przeciwutleniających umożliwia zastosowanie wytworzonych folii do produkcji materiałów opakowaniowych i zastąpienie nimi materiałów syntetycznych.
This paper provides areview of the literature on the effect of essential oils on the properties of gelatin, chitosan, and gelatin-chitosan films. Biopolymer films are inexpensive, biocompatible and functional, while the modification of biopolymer matrix with antibacterial and antioxidant essential oils makes possible to use the produced films in food packaging instead of synthetic materials.
Źródło:
Polimery; 2017, 62, 6; 428-433
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrophobic properties of Candida spp. under the influence of selected essential oils
Autorzy:
Rajkowska, Katarzyna
Kunicka-Styczyńska, Alina
Pęczek, Marlena
Powiązania:
https://bibliotekanauki.pl/articles/1038879.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Candida spp.
food-borne and clinical strains
hydrophobic properties
essential oils
Opis:
Processes of colonization of biotic and abiotic surfaces and biofilm formation depend inter alia on hydrophobic properties of Candida spp. The aim of this research was to determine the effect of tea tree, thyme and clove essential oils on hydrophobic properties of environmental and clinical Candida isolates. The relative cell surface hydrophobicity of strains tested was high, and ranged from 68.7% to 91.2%, with the highest value for a C. rugosa food-borne strain. The effectiveness of essential oils was diversified and depended on the type of essential oil, concentration and yeast strain. Statistically significant decrease of hydrophobicity indexes was observed after application of tea tree oil for C. krusei, clove oil for C. albicans reference strain, and all essential oils tested for C. rugosa. Only in the case of C. famata food-borne strain and C. albicans clinical isolate, solely used essential oils did not affect their hydrophobic properties. To determine the interactions of essential oils, their mixtures (1 MIC:1 MIC, 1 MIC:2 MIC and 2 MIC:1 MIC) were applied. Generally, essential oils used in combinations influenced yeast's hydrophobic properties much more than applied separately. The essential oils' mixtures reduced hydrophobicity of Candida yeasts in the range of 8.2 to 45.1%, depending on combination and strain. The interaction indexes of essential oils used in combinations predominantly indicate their additive effect. The application of tea tree, thyme and clove essential oils, especially in combinations, decreases hydrophobicity of the tested Candida isolates with implications of a probable advantageous limitation of their ability to colonize the food production industry environment.
Źródło:
Acta Biochimica Polonica; 2015, 62, 4; 663-668
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The potential application of Origanum dubium Boiss. essential oil as a seed protectant against bean and tomato seed-borne bacterial pathogens
Autorzy:
Basim, H.
Turgut, K.
Kaplan, B.
Basim, E.
Turgut, A.
Powiązania:
https://bibliotekanauki.pl/articles/12687443.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
plant cultivation
bean
tomato
Origanum
Origanum dubium
antimicrobial activity
essential oil
essential oil treatment
plant protection
seed protection
bacterial pathogen
Opis:
Origanum dubium is a valuable wild oregano species of the natural flora of Antalya, Turkey. In this study, we extracted essential oil (EO) by hydro-distillation of the aerial parts of selected O. dubium chemotype with highest EO content, and analyzed by gas chromatography/mass spectrometry. Carvacrol was the primary component (85.9%) among 24 different compounds in the EO. The volatile test showed minimum inhibitory effect of the EO against Xanthomonas axonopodis pv. vesicatoria, Clavibacter michiganensis subsp. michiganensis, Xanthomonas axonopodis pv. phaseoli, Xanthomonas axonopodis pv. phaseoli var. fuscans, and Pseudomonas syringae pv. tomato, at 309, 303, 318, 254, and 901 µL/mL, respectively. A 1-hour treatment of bean and tomato seeds in the volatile phase of the EO effectively sterilized the seeds from bacterial pathogens without inhibiting their germination. To the best of our knowledge, this is the first study on the potential for the use of O. dubium EO as a seed protectant against bean and tomato seed-borne bacterial pathogens.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 3; 79-86
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Access to standard essential patents and antitrust enforcement: the case for licensing component manufacturers
Autorzy:
Sikorski, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/1037599.pdf
Data publikacji:
2020-06-30
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
standard essential patents (SEPs)
FRAND licenses
refusal to license
licensing at component level
technical standards
Opis:
The ability to compete on numerous markets today depends on access to technological standards. When standards are protected by standard essential patents (SEP), a license to use such SEPs will be required. There have been numerous disputes in various jurisdictions over refusals to license SEPs. Most recently, disputes concern access to SEPs by the manufacturers of components. Some SEP holders deny access to their standard essential patents to component manufacturers and prefer to license end product producers. This practice has become a highly contentious issue around the world. In particular, manufacturers of components who are denied access to SEPs claim that such refusals amount to violations of competition rules. The author examines this highly contested practice is an attempt to show when denying access to an SEP license could harm competition.
Źródło:
Ruch Prawniczy, Ekonomiczny i Socjologiczny; 2020, 82, 2; 19-33
0035-9629
2543-9170
Pojawia się w:
Ruch Prawniczy, Ekonomiczny i Socjologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of chemical modification of hydrodistillation on yield, composition and biological activity of Rosmarinus officinalis essential oil
Autorzy:
Dzięcioł, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1849323.pdf
Data publikacji:
2021
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Rosmarinus officinalis essential oil
chemical modification of hydrodistillation
antioxidant activity
fungicidal activity
Opis:
Studies on the chemical modifications of Rosmarinus officinalis essential oil hydrodistillation process (HD) by using 5% citric acid (CA-HD) and 5% trisodium citrate (TSC-HD) ase water phase were performed. Composition of essential oils obtained in conventional and modified conditions was analyzed by gas chromatography with mass selective detector method (GC-MS) and compared. Antioxidant activity of all essential oils was determined spectrophotometrically by using DPPH radical scavenging method. It was found that applied modifications of hydrodistillation process enhanced yields and antioxidant activity and the best results were obtained using 5% citric acid as a modifier. Effect of this modification on fungicidal activity of essential oils against 8 various fungi strains (Alternaria alternata, Botrytis cinerea, Fusarium culmorum, Phythophtora cactorum, Rhizoctonia solani, Phythophtora infestans, Sclerotinia sclerotiorum and Ascosphaera apis) was also determined and in most cases enhanced activity was observed.
Źródło:
Polish Journal of Chemical Technology; 2021, 23, 3; 49-53
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CHEMICAL COMPOSITION OF THE ESSENTIAL OIL AND FLAVONOIDS OF THYMUS SERPYLLUM L., GROWING ON TERRITORY OF THE EAST KAZAKHSTAN
Autorzy:
Tazabayeva, Kulyash A.
Sylibaeva, Batiyash
Powiązania:
https://bibliotekanauki.pl/articles/895645.pdf
Data publikacji:
2018-12-31
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
essential oils
flavonoids
anticancer activity
Thymus serpyllum
Opis:
Thymus serpyllum L. (T.serpyllum) has a great interest as a potential plant component, which is used in the production of fermented milk products with anticancer effect. The plant material was collected at the flowering stage. Chemical composition of essential oil and flavonoids from the aerial parts of the T. serpyllum, grown in the Southern Altai of the East Kazakhstan region, has been investigated for the first time. Output of the essential oil received from the aerial part of the plant in the flowering stage was on average 0,2%. Forty-one compounds were identified in T. serpyllum essential oil, which accounts for 96, 1% of the total oil. The main components of the oil were thymol (41,8%), γ-terpinene (15,3%), o-cymene (10,9%). Apart from the composition of essential oils, there were shown some flavonoids, such asapigenin 7 glucoside (0.24 % of dried plant material), luteolin (0,039 %), quercetin (0,006 %), which demonstrated a cytotoxic effect on cancer cells. In our experiments, luteolin had greater cytotoxic effect on cancer cells HCT-15 than quercetin. IC50 value of quercetin (100 μM) was higher than that of luteolin (50 μM).
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 6; 1329-1337
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The antioxidant and antibacterial activities of the essential oils of Marrubium vulgare growing wild in Eastern Algeria
Autorzy:
Abadi, A.
Abdellatif, F.
Powiązania:
https://bibliotekanauki.pl/articles/412468.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Marrubium vulgare
Essential oil composition
GC-MS
antibacterial activities
antioxidant
Opis:
The chemical composition was analyzed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). The constituents were identified by their mass spectra and Kovats’ indices. Fivety (50) components in the oil of M. vulgare were identified. The results demonstrated that the major components of the essential oil were : 4,8,12,16-Tetramethyl heptadecan-4-olid (16.97 %), Germacrene D-4-ol (9.61 %), α- pinéne (9.37 %), Phytol (4.87 %), Dehydro-sabina ketone (4.12 %), Piperitone (3.27 %), δ-Cadinene (3.13 %), 1-Octen-3-ol (2.35 %) and Benzaldehyde (2.31 %). The antioxidant activity of the oils was assessed by measurement of metal chelating activity, the reductive potential, the free radical scavenging (DPPH) assay. The antioxidant activity was compared with that of synthetic antioxidants: butylated hydroxyanisole (BHT) , and the essential oils . The results showed as the Essential oil of M vulgare was evaluated for its antibacterial activities against Gram-positive and Gram negative pathogenic bacteria: Listeria monocytogene, Pseudomonas aeruginosa , Agrobacterium tumefaciens and Salmonella enterica.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 10, 2; 159-166
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel method of time-frequency analysis: an essential spectrogram
Autorzy:
Czarnecki, K.
Powiązania:
https://bibliotekanauki.pl/articles/332003.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
A novel precise method of time-frequency analysis is presented. In the algorithm, a new energy distribution is estimated by simultaneously discard or displacement of the classical spectrogram energy. A channelized instantaneous frequency and a local group delay are used in order to replacement in the same manner as formulated by Kodera et al. [1, 2]. Additionally, new representations: a channelized instantaneous bandwidth and a local group duration are used in order to remove some part of irrelevant energy. A newly obtained energy distribution called essential spectrogram is highly concentrated and signal mono-components are precisely localized in the time-frequency domain.
Źródło:
Hydroacoustics; 2013, 16; 29-34
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of enzymatic pretreatment on yield and chemical composition of Rosmarinus officinalis essential oil
Autorzy:
Dzięcioł, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2174831.pdf
Data publikacji:
2022
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Rosmarinus officinalis essential oil
Rosmarinus officinalis hydrolate
modification of hydrodistillation
enzymatic pretreatment
total phenolic content (TPC)
Opis:
Effect of enzymatic pretreatment before hydrodistillation process on yield and composition of Rosmarinus officinalis essential oil was studied. Results obtained by using two selected commercial enzymes applied in food and beverage industry were compared. Control process with non-enzymatic pretreatment in analogous conditions was also performed for proper interpretation of results. Application of gas chromatography with mass selective detector (GC-MS) enabled analysis and comparison of essential oils composition. Moreover, total phenolic content (TPC) was determined spectrophotometrically in post-processing hydrolates, which are also valuable products e.g. for cosmetic applications. Modifications of isolation process by pretreatment with selected enzymes resulted in significant increase in essential oil yields in comparison to conventional hydrodistillation and control process with non-enzymatic pretreatment in analogous conditions. No substantial changes in the composition of obtained essential oils were observed. In post-processing hydrolates higher values of total phenolic content (TPC) were found both after enzymatic and non-enzymatic pretreatment.
Źródło:
Polish Journal of Chemical Technology; 2022, 24, 4; 61--66
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficacy of Lamiaceae essential oils with selected azoles against Candida albicans clinical isolates
Autorzy:
Proškovcová, M.
Čonková, E.
Váczi, P.
Marcinčáková, D.
Harčárová, M.
Powiązania:
https://bibliotekanauki.pl/articles/16539174.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Candida albicans
fluconazole
itraconazole
Lamiaceae essential oils
synergistic effect
Opis:
A current problem in candidiasis treatment is increasing resistance to azoles, which are often prescribed to patients. The study underlines the high resistance of yeasts to fluconazole, which achieved high MIC (minimal inhibitory concentration) values both alone and in combination with essential oils (EOs). Antifungal activity of Hyssopus officinalis, Thymus vulgaris, Salvia officinalis and Rosmarinus officinalis EOs was determined against 13 clinical isolates of Candida albicans and reference strain Candida albicans ATCC 10231. The synergistic effect was investigated for the combination of itraconazole and fluconazole with Hyssopus officinalis and Thymus vulgaris EOs. Based on the fractional inhibitory concentration index, the synergistic effect was achieved in all of the samples exposed to itraconazole with Hyssopus officinalis (FICI 0.3±0.06). On the other side, the additive effect was proven in use of itraconazole with Thymus vulgaris (FICI 0.75±0.35) and fluconazole with both EOs tested (FICI 0.81±0.19; 0.88±0.57) This study shows the importance of monitoring the synergistic effect of antifungals combined with EOs, because it is a possible solution for reducing the resistance and improving the disease prognosis.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 2; 279-285
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antifungal effect of Satureja khuzestanica Jamzad essential oil on oral candidiasis in immunosuppressed rats
Autorzy:
Najibzadeh, T.
Yadegary, M.H.
Powiązania:
https://bibliotekanauki.pl/articles/72688.pdf
Data publikacji:
2018
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
aromatic plant
Satureja khuzestanica
antifungal effect
essential oil
oral candidiasis
rat
immunosuppression
candidiasis
Opis:
The antimicrobial, antibacterial, antioxidant, antihyperlipidaemic, antidiabetic, anti-inflammatory and analgesic effects of Satureja khuzestanica (Lamiaceae) have been investigated in numerous studies. The antifungal effects of S. khuzestanica essential oil (SKJO) in immunosuppressed rats suffering from oral candidiasis were investigated. A fungal suspension with a density of 3×108 CFU/ml was taken from the isolate of a case with acute vaginitis. In order to achieve a medicinal formulation, accurate twice the minimum inhibitory concentration (MIC) of SKJO and 10 times MIC of nystatin was used with 0.8% agar as a base material. In this study, 35 rats divided into 5 groups each of 7 were used. The assessment of level of infection and specification of the effects of treatment were performed using microbiological and histopathological methods as well as clinical examinations. Our results show that carvacrol is the main compound of SKJ essential oil. Lesions completely disappeared in both treatment groups (SKJO and nystatin) after 8 days of treatment. Furthermore, in groups treated with SKJO and nystatin, the quantities of mean logarithm of colony forming unit (CFU) were 85.62% and 90.62%, respectively, in comparison with placebo group. Also, histopathological properties suggested no infection in groups who had clean and normal dorsal tongue mucosa. Using SKJO with twice accuracy it was concluded that MIC in immunosuppressed rats was quite successful in a time of a week and equal with that of a nystatin treatment with an accuracy of 10 times the MIC.
Źródło:
Herba Polonica; 2018, 64, 3
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O istotnym i nieistotnym występowaniu jakiegoś wyrażenia w innym wyrażeniu
On Essential and Inessential Occurrence of Expressions in Another Expressions
Autorzy:
Brożek, Anna
Powiązania:
https://bibliotekanauki.pl/articles/909843.pdf
Data publikacji:
2005-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Filozofii
Tematy:
denotation & connotation
essential occurrence
inessential occurrence
logical value
semantic category
Opis:
Let us assume that the expression A is a segment of the expression B. Now, let us assume that we try to transform the expression B into the expression B', removing A from B or replacing A with another expression, say A'. When shall we say that A is irremovable or occurs in B essentially? We shall do it, if we can neither remove A from B nor replace A with A', not influencing upon important properties of B. On the other hand, when shall we say that the occurrence A in B is essential? We shall do it, if we can transform B into B' changing no <> properties of B. Let us say it more precisely. Let us assume - as concerns expressions x, y, x' and y' - that: (a) x occurs in y; (b) the only structural difference between y and y' is that x does not occur in y', or x' occurs in y instead of x. Then: x occurs in y inessentially-with-respect-to-w of y, iff y' is the same as y with respect to p. Correspondingly: x occurs in y essentially-with-respect-to-w of y, iff y' is different as y with respect to p. The occurrence x in y may be essential or inessential with respect to syntactic, semantic or pragmatic properties of y. In my paper, I discuss a variety of detailed concepts of the (in)essential occurrence of expressions in another expressions with respect to semantic properties of these expressions, i.e. with respect to semantic category, logical value, denotation and connotation. I also discuss some philosophical and methodological implications of presented solutions of the problem.
Źródło:
Filozofia Nauki; 2005, 13, 2; 5-25
1230-6894
2657-5868
Pojawia się w:
Filozofia Nauki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Additivity interactions between fluconazole and citrus essential oils to Aspergillus fumigatus
Autorzy:
Wroblewska-Luczka, P.
Luszczki, J.
Powiązania:
https://bibliotekanauki.pl/articles/2098525.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Tematy:
Aspergillus fumigatus
mycosis
mould
interaction
fluconazole
essential oil
antifungal property
antibacterial property
antiinflammatory property
isobolographic analysis
Opis:
Introduction. Aspergillus fumigatus is the most common pathogen causing allergic bronchopulmonary mycosis. The pathogenic capacity of Aspergillus fumigatus is related to its thermal tolerance and the small size of the spores which enables transfer to the respiratory tract. In the case of fungal diseases, their treatment is based on fungicidal antibiotics, such as fluconazole. Due to the growing problem of drug resistance, new therapeutic solutions are sought, especially of natural origin. Essential oils, due to their anti-bacterial, anti-fungal, anti-inflammatory and immunostimulatory properties, constitute interesting research material in the fight against mould. Objective. The aim of the study was to assess the type of pharmacodynamic interactions between fluconazole and selected essential oils: lemon, orange, tangerine, and grapefruit in an in vitro study against Aspergillus fumigatus. Isobolographic analysis of the results allowed determining the type of interactions between fluconazole and the tested essential oils. Results. According to the research results, a IC50 dose of fluconazole versus Aspergillus fumigatus IC50 = 1.87±0.88mg/ml. The most active essential oil was lemon oil, which at the concentration of 4% in medium completely inhibited the growth of Aspergillus fumigatus. Tangerine essential oil is the least active against A. fumigatus. Isobolographic analysis of the interactions between fluconazole and essential oils showed additive interactions for the combination of fluconazole with lemon, orange and grapefruit ols, and an additive interaction with a tendency to synergism for the combination of fluconazole with tangerine oil. Conclusions. Isobographic analysis can contribute to the introduction of natural substances into the therapy of many diseases.
Źródło:
Journal of Pre-Clinical and Clinical Research; 2021, 15, 3; 116-120
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of essential oils as natural cosmetic preservatives
Zastosowanie olejków eterycznych jako naturalnych środków konserwujących w kosmetykach
Autorzy:
Dreger, M.
Wielgus, K.
Powiązania:
https://bibliotekanauki.pl/articles/71562.pdf
Data publikacji:
2013
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
essential oil
application
natural cosmetic
cosmetic preservative
antimicrobial activity
challenge test
Opis:
Nowadays, safety of chemical preservatives has been questioned by a big number of consumers. Traditionally used preservatives often cause skin irritation and lead to allergenic reactions. Growing demands for more natural and preservative-free cosmetics promoted an idea of the replacement of synthetic preservatives with essential oils (EOs) of antimicrobial properties. The antimicrobial effect of essential oil depends on content, concentration and interactions between the main active compounds. Effective preservatives should be characterized by a broad spectrum of antimicrobial activity at a minimum concentration. Formulations containing both types of preservatives: essential oil and a synthetic one have been tested and proposed as a compromise that allows for reducing concentration of both components due to their synergistic activity. Although most essential oils are regarded as safe, some of them may cause risk of contact allergy or phototoxic reaction. A well balanced risk-benefit assessment of essential oils is one of the great challenges for scientists or health policy authorities. This paper presents current state of knowledge on essential oils focused on their antimicrobial properties, the assessment of their efficacy and safety as cosmetic preservatives.
Bezpieczeństwo stosowanych obecnie syntetycznych środków konserwujących jest kwestionowane przez coraz większą rzeszę konsumentów. Przypadki reakcji uczuleniowych oraz potencjalne ryzyko wystąpienia innych problemów zdrowotnych spowodowało rosnące zapotrzebowanie na naturalne i pozbawione środków konserwujących kosmetyki. Zainicjowało również ideę zastąpienia syntetyków przez olejki eteryczne o właściwościach przeciwdrobnoustrojowych. Wyniki badań pokazują, że formulacja zawierająca zarówno olejek eteryczny, jak i syntetyczny środek konserwujący pozwala zmniejszyć stężenie obu czynników i dzięki temu osiągnąć lepszy efekt. Chociaż większość olejków eterycznych uważana jest za substancje bezpieczne, to niektóre z nich mogą powodować ryzyko uczuleń lub reakcji fototoksycznej. Dobrze skalkulowana ocena korzyści i ryzyka jest jednym z wyzwań stojących przed naukowcami oraz instytucjami zajmującymi się polityką zdrowotną. Artykuł prezentuje aktualny stan wiedzy na temat olejków eterycznych, ze szczególnym uwzględnieniem ich mechanizmu działania, skuteczności konserwującej w produktach kosmetycznych, a także kwestię bezpieczeństwa ich stosowania.
Źródło:
Herba Polonica; 2013, 59, 4
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of essential oils and their combinations added to broiler diets on the mineral contents of some tissues and bone breaking strength
Autorzy:
Sevim, B.
Cufadar, Y.
Powiązania:
https://bibliotekanauki.pl/articles/2119510.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Zootechniczne
Tematy:
broiler
diet
essential oil
bone
mineral
Opis:
The current research was conducted to determine the effect of thyme (Thymus vulgaris L.), rosemary (Rosmarinus officinalis L.), and French lavender (Lavandula stoechas L.) essential oils and their combinations on serum, bone and excreta mineral content and bone breaking strength in broilers. A total of 640 day-old broiler chicks (Ross 308) were randomly allocated to eight treatment groups with five replicates each. The experimental diets were prepared by adding essential oils to the control diet as follows: control (0 mg/kg), thyme essential oil (50 mg/kg), rosemary essential oil (50 mg/kg), French lavender essential oil (50 mg/kg), thyme + rosemary (25+25 mg/kg), thyme + French lavender (25+25 mg/kg), rosemary + French lavender (25+25 mg/kg) and thyme + rosemary + French lavender (16,7+16,7+16,7 mg/kg). No difference was shown between the treatment groups in serum content of Ca, Mg, P or Zn (P > 0,05). Tibia Ca, Mg and P contents were statistically significant (P < 0,01), while tibia breaking strength was not significant (P > 0,05). Excreta Ca, Fe, Mg, Mn, P and Zn contents were significantly affected by the dietary treatments (P < 0,01), but excreta Cu content was not statistically significant (P > 0,05). The addition of thyme essential oil to the diet was effective in increasing tibia Ca, P and Mg content. The essential oils used, especially their binary mixtures, can be effective in reducing the amount of minerals excreted in the faeces.
Źródło:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego; 2021, 17, 3; 59-69
1733-7305
Pojawia się w:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the fungicidal properties of essential oils from Leptospermum scoparium and Azadirachta indica in relation to selected fungi causing wood decay
Autorzy:
Świstak, Joanna
Betlej, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/2200175.pdf
Data publikacji:
2020
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
essential oils
fungicides
wood rotting fungi
Opis:
Evaluation of the fungicidal properties of essential oils from Leptospermum scoparium and Azadirachta indica in relation to selected fungi causing wood decay. The publication presents the results of evaluation of the fungicidal effect of two essential oils from Leptospermum scoparium (manuka) and Azadirachta indica (neem) on fungi that cause the decomposition of Trametes versicolor and Coniophora puteana wood. Research results indicate that the growth of the tested fungi is clearly inhibited with the participation of the highest concentrations of essential oils used. At the same time, it was found that the action of neem oil was stronger compared to the Traetes versicolor fungus. In contrast, manuka essential oil has a stronger inhibitory effect on the growth of Coniophora puteana.
Ocena właściwosci grzybobójczych olejków z Leptospermum scoparium i Azadirachta indica w stosounku do wybranych grzybów powodujacych rozkład drewna. W publikacji przedstawiono wyniki oceny działania fungicydowego dwóch olejków eterycznych z L. scoparium (manuka) i A. indica (neem) na grzyby powodujące rozkład drewna Trametes versicolor i Coniophora puteana. Rezultaty badań wskazują, że wzrost testowanych grzybów jest wyraźnie hamowany przy udziale największych z zastosowanych stężeń badanych substancji chemicznych. Jednocześnie stwierdzono, że działanie olejku neem było mocniejsze w stosounku do grzyba T. versicolor. Z kolei olejek manuka działał silniej inhibujaco na wzrost grzyba C. puteana.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2020, 110; 118--125
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
DIPSACUS FULLONUM L. LEAVES AND ROOTS - IDENTIFICATION OF THE COMPONENTS OF THE ESSENTIAL OILS AND ALPHA-AMYLASE INHIBITORY ACTIVITIES OF METHANOLIC EXTRACTS
Autorzy:
Witkowska-Banaszczak, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/895320.pdf
Data publikacji:
2018-08-31
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
essential oil composition
methanolic extract
alpha-amylase inhibition
Opis:
Abstract: Dipsacus fullonum L. syn. D. sylvestris is a biennial plant from the Dipsacaceae family. It grows in Europe, North Africa and Asia Minor. It has been used in folk medicine mainly to treat Lyme disease. This study was undertaken to identify and compare the components of the essential oils from dried and fresh roots, which are usually applied as medicinal agents, as well as those of the essential oils from dried and fresh leaves, used less frequently. The essential oils from the Dipsacus fullonum leaves and roots were analysed by the GC and GC-MS analysis. 18 components were identified in the essential oil from the fresh leaves, whereas 37 were recognised in the oil from the dried leaves; 10 components were identified in the essential oil from the fresh roots and 40 in that from the dried roots. Phytol was the main component in the essential oil from the leaves, whereas n-hexadecanoic acid was predominant in the roots. The α -amylase inhibition has been proven for methanolic extracts of D. fullonum leaves and roots. The strongest activity was demonstrated by the extract from fresh leaves of D. fullonum and showed an effect about one hundred times weaker than acarbose.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 4; 951-957
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical composition of essential oil and antioxidant activity of Postia puberula, an endemic species from Iran
Autorzy:
Hemmati Hassan Gavyar, P.
Amiri, H.
Powiązania:
https://bibliotekanauki.pl/articles/12614017.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
Iran
endemic species
Postia puberula
chemical composition
essential oil
antioxidant activity
Opis:
Essential oils from the leaves, stems and flowers of Postia puberula at the flowering stage were analyzed using GC and GC/MS. The results showed that leaves are abundant of cis-3-hexenyl benzoate (10.75%), benzyl benzoate (8.16%) and caryophyllene oxide (8.12%). The main compounds of stems were benzyl benzoate (21.92%), E-nuciferol (11.58%) and dibutyl phthalate (7.08%), while major components of flowers were benzyl benzoate (9.99%), caryophyllene oxide (8.14%) and E-nuciferol (8.13%). The antioxidant activities of methanol extract were evaluated by DPPH and β-carotene/linoleic acid assays. The results showed that in both methods, leaves had stronger antioxidant activity than other organs.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 1; 119-128
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of composition of essential oil and coumarin compounds of Angelica archangelica L.
Autorzy:
Forycka, A.
Buchwald, W.
Powiązania:
https://bibliotekanauki.pl/articles/2048982.pdf
Data publikacji:
2019
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
Angelica archangelica
essential oil
coumarins
furanocoumarins
chemical composition
chemotaxonomy
olejek eteryczny
kumaryny
furanokumaryny
chemotaksonomia
skład chemiczny
Opis:
The medicinal and culinary properties of Angelica archangelica L. have been known and valued since the Middle Ages. Ingredients of essential oil and coumarins found in this plant are to a large degree responsible for its pharmacological activity. This study is a review of the literature of the most important biologically active compounds present in herbal raw materials: root (rhizome with roots) and angelica fruits. Research shows that the content of individual compounds of the essential oil and coumarin fraction is variable, which may point to a large intraspecific variation. Therefore, these compounds may be good markers for identifying taxa or chemotypes in chemotaxonomic research valuable for the herbal medicine and pharmaceutical industry.
Źródło:
Herba Polonica; 2019, 65, 4; 62-75
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity of Fusarium solani isolated from asparagus on essential oils
Wrażliwość Fusarium solani wyizolowanego ze szparaga na olejki eteryczne
Autorzy:
Grata, K.
Powiązania:
https://bibliotekanauki.pl/articles/388811.pdf
Data publikacji:
2016
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
Fusarium solani
asparagus
essential oils
antifungal activity
szparagi
olejki eteryczne
aktywność przeciwgrzybowa
Opis:
The purpose of this study was to evaluate the antifungal properties of sage oil, clove oil and basil oil against Fusarium solani isolated from white asparagus spears (Asparagus officinalis L.). A dual culture plate method was used for the assessment of the inhibitory effects of essential oils and volatile components on mycelium, inoculated into a PDA medium. The culturing process was conducted for 9 days at a temperature of 26oC and the fungal linear growth was measured every 1–3 days. The conidial germination of the fungus in the presence of oils was evaluated by microscope method. The results show differences in the fungistatic activity of oils, dependent on the type and dose of the oil. Generally the oils had a higher impact against the fungal spores than on mycelium growth of F. solani, however the type of oil and dose determined different amounts. The conidial germination was most inhibited by the basil oil (98.9% maximum inhibition), followed by the clove and sage oils at a concentration of 4% (respectively 89.9% and 85.4% maximum inhibition). In contrast, the oils had much less of an impact on the linear mycelial growth of F. solani. Use of the highest dose of clove oil reduced the linear growth of mycelium by 29.9%, sage oil by 14.8% and basil oil by 4%. Furthermore, gas metabolites limited the growth of F. solani. The degree of inhibition of mycelium amounted to 17.1% for clove oil, 15.5% for sage oil and 9.3% for basil oil used in the maximum concentration 4.0%. Based on these results, clove oil was the greatest inhibitor of mycelial growth and sporulation of F. solani.
Celem badań była ocena przeciwgrzybicznych właściwości olejku z szałwii, olejku goździkowego i olejku bazyliowego wobec Fusarium solani wyizolowanego z pędów szparaga (Asparagus officinalis L.) Ocenę właściwości antagonistycznych testowanych olejków i ich metabolitów gazowych wobec grzybni przeprowadzono metodą hodowlano-płytkową na podłożu PDA. Hodowlę prowadzono przez 9 dni w temp. 26oC, dokonując pomiarów co 1–3 dni. Natomiast zarodnikowanie grzyba w obecności olejków oceniono metodą mikroskopową. Przeprowadzone badania wykazały różnice w aktywności metabolicznej testowanych olejków. W zależności od rodzaju olejku i jego dawki, stwierdzono większą aktywność wobec zarodników grzybów niż na wzrost grzybni F. solani. Największy wpływ na zdolność kiełkowania zarodników wykazał olejek bazyliowy, następnie kolejno olejek goździkowy i olejek szałwiowy w stężeniu 4%. Stopień zahamowania kiełkowania zarodników wyniósł odpowiednio: 98,9%, 89,9% oraz 85,4%. Natomiast zdecydowanie mniejszy wpływ wykazały na wzrost grzybni F. solani. Zastosowanie największej dawki olejku goździkowego ograniczy ło tempo wzrostu grzyba o 29,9%, olejku szałwiowego o 14,8% a olejku bazyliowego tylko o 4,0%. Równie ż metabolity gazowe ograniczały wzrost grzybni F. solani. Stopień zahamowania wzrostu wynosił odpowiednio 17,1% dla olejku goździkowego, 15,5% dla olejku szałwiowego i 9,3% dla bazyliowego. Biorąc pod uwagę analizowane czynniki, olejek goździkowy okazał się największym inhibitorem kiełkowania zarodników i wzrostu grzybni F. solani.
Źródło:
Ecological Chemistry and Engineering. A; 2016, 23, 4; 453-464
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of the essential oils addition on the rate of bacterial cellulose surface overgrowth by mold fungi
Autorzy:
Jałowiecki, Marcin
Betlej, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/2146693.pdf
Data publikacji:
2021
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
bacterial cellulose
mold fungi
essential oils
celuloza bakteryjna
grzyby pleśniowe
olejki eteryczne
Opis:
Effect of the essential oils addition on the rate of bacterial cellulose surface overgrowth by mold fungi. The aim of this study was to determine the effectiveness of protecting films made of bacterial cellulose with essential oils against overgrowth by mold fungi. The cellulose film produced by microorganisms forming a pellicle called SCOBY was modified by introducing into the cellulose pulp essential oils: cinnamon and manuka. Samples of the protected film were treated with mold fungi: Chaetomium globosum, Aspergillus niger and Trichoderma viride. On the basis of the tests conducted, the rate of film overgrowth by mold fungi and the effectiveness criteria of cellulose film protection with essential oils were determined. The addition of cinnamon oil protected the film against the growth of Aspergillus niger and Chaetomium globosum fungi. Manuka oil slowed down the growth of Chaetomium globosum microorganisms on the surface of the bacterial cellulose film sample, but did not protect the samples from overgrowth. The essential oils tested were ineffective against the fungus Trichoderma viride.
Wpływ dodatku olejków eterycznych na stopień porastania powierzchni celulozy bakteryjnej przez grzyby pleśnie. Przedmiotem badań było ustalenie skuteczności zabezpieczenia folii wytworzonej z celulozy bakteryjnej olejkami eterycznymi przed porastaniem grzybami pleśniowymi. Folia celulozowa, wytworzona przez mikroorganizmy tworzące konsorcjum zwane SCOBY została poddana modyfikacji poprzez wprowadzenie do pulpy celulozowej olejków eterycznych: cynamonowego i z manuka. Próbki zabezpieczonej folii zostały poddane działaniu grzybów pleśniowych: Chaetomium globosum, Aspergillus niger i Trichoderma viride. Na podstawie przeprowadzonych badań określono stopień oceny porastania folii przez grzyby pleśniowe i kryteria skuteczności zabezpieczenia folii celulozowej olejkami eterycznymi. Dodatek olejku cynamonowego zabezpieczył folię przed rozwojem grzybów Aspergillus niger i Chaetomium globosum. Olejek manuka spowolnił rozwój mikroorganizmów Chaetomium globosum na powierzchni próbki folii celulozy bakteryjnej, ale nie zabezpieczył próbek przez porastaniem. Badane olejki eteryczne okazały się nieskuteczne wobec grzyba Trichoderma viride.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2021, 114; 43--52
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Essential oils in the needles of Scots pine (Pinus sylvestris L.)
Wydajność olejków eterycznych z igliwia sosny zwyczajnej (Pinus sylvestris L.)
Autorzy:
Sporek, M.
Powiązania:
https://bibliotekanauki.pl/articles/126554.pdf
Data publikacji:
2014
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
essential oil
pine needles
Scots pine
olejek eteryczny
igliwie
sosna zwyczajna
Opis:
The aim of the study was to determine the content of essential oils in pine needles in 3 canopy zones (lower, middle and upper) of model trees, for 3 youngest needle cohorts (1, 2 and 3 years old). The research revealed a clear increase in the content of essential oils from the lower through the middle to the upper part of the crown. The lowest oil content was found in 3-year-old needles (0.40%), while 1-year and 2-year old needles contained 0.48 and 0.49% of oil, respectively.
Celem badań było określenie wydajności olejków eterycznych w igliwiu sosnowym w 3 strefach korony drzew modelowych (dolnej, środkowej i górnej) dla 3 najmłodszych roczników igliwia (1-, 2- i 3-letniego). W wyniku przeprowadzonych badań stwierdzono wyraźny wzrost wydajności olejków eterycznych w kierunku od dolnej poprzez środkową do górnej części korony. Najmniejszą zawartość olejku stwierdzono w igliwiu 3-letnim (0,40%), natomiast igliwie 1-roczne i 2-letnie zawierało odpowiednio 0,48 i 0,49%.
Źródło:
Proceedings of ECOpole; 2014, 8, 2; 437-441
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanoemulsje roślinnych olejków eterycznych oraz ich zastosowanie w utrwalaniu żywności
Plant essential oils nanoemulsions and their application in food preservation
Autorzy:
Kordala, Natalia
Powiązania:
https://bibliotekanauki.pl/articles/472879.pdf
Data publikacji:
2017-06-01
Wydawca:
Collegium Witelona Uczelnia Państwowa
Tematy:
roślinne olejki eteryczne
nanoemulsje
utrwalanie żywności
plant essential oils
nanoemulsions
food preservation.
Opis:
Przedstawiono aktualny stan wiedzy o kierunkach i możliwościach stosowania roślinnych olejków eterycznych w utrwalaniu żywności. Zwrócono uwagę na mechanizm oddziaływania składników olejków eterycznych na mikroorganizmy patogenne oraz wskazano czynniki decydujące o ich skuteczności. W celu jej doskonalenia opisano procedury stosowane w przygotowaniu nanoemulsji olejów eterycznych. Podano przykłady metod ich otrzymywania oraz zastosowania w utrwalaniu żywności
The article describes the current state of knowledge on directions and possibilities of the use of plant essential oils in food preservation. Attention is drawn to the mechanism of action of essential oils components on pathogenic microorganisms and indication of the factors in determining their effectiveness. An overview of the procedures used in the preparation of essential oils nanoemulsions is provided. The examples of methods for their preparation and use in food preservation are also presented
Źródło:
Zeszyty Naukowe Państwowej Wyższej Szkoły Zawodowej im. Witelona w Legnicy; 2017, 2, 23
1896-8333
Pojawia się w:
Zeszyty Naukowe Państwowej Wyższej Szkoły Zawodowej im. Witelona w Legnicy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Językowe rytuały fatyczne w publikacjach edukacyjnych
Linguistic Rituals Essential for Educational Publications
Autorzy:
Bortliczek, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2037928.pdf
Data publikacji:
2021-09-07
Wydawca:
Akademia Ignatianum w Krakowie
Tematy:
nadawca
odbiorca
kontakt
rytuały fatyczne
wspólnota fatyczna
„my” inkluzywne
pluralis modestiae
sender
receiver
communication
essential rituals
natural community
“We” inclusive
Opis:
Artykuł zawiera analizę wybranych publikacji edukacyjnych skierowanych do dzieci uczących się czytać, a także do uczniów pogłębiających wiedzę o języku. Celem analizy jest odpowiedź na pytania: Jakie językowe rytuały fatyczne są obecne w analizowanych tekstach? Jak jest minimalizowany lub maksymalizowany dystans poznawczy, językowy i społeczny między uczestnikami dyskursu edukacyjnego? Prezentowane w artykule ujęcie deskryptywne dotyczy językowych i stylistycznych sposobów kreowania wspólnoty fatycznej przede wszystkim w kontakcie z dziećmi uczącymi się czytać, a także – z samodzielnie czytającymi uczniami. Analiza zmierza do wskazania środków, które służą budowaniu wspólnoty fatycznej, oraz do uchwycenia specyfiki rytuałów fatycznych w zależności od statusu odbiorcy.
The paper includes an analysis of selected educational publications addressed to children who learn to read, as well as to learners who develop their knowledge about language. The aim of the analysis is to answer the following questions: What linguistic phatic rituals are present in the analysed texts? How can cognitive, linguistic and social distance be minimalised or maximalised among the participants of an educational discourse? A descriptive approach presented in this paper refers to linguistic and stylistic manners of forming a phatic community, first of all in communication with children who learn to read and with learners who can read on their own. The analysis intends to indicate the means that serve to develop a phatic community and to capture the characteristic features for the phatic rituals due to the recipient’s status.
Źródło:
Edukacja Elementarna w Teorii i Praktyce; 2021, 16, 4(62); 81-92
1896-2327
Pojawia się w:
Edukacja Elementarna w Teorii i Praktyce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Essential norm of an integral-type operator from ω-Bloch spaces to μ-Zygmund spaces on the unit ball
Autorzy:
Du, J.
Zhu, X.
Powiązania:
https://bibliotekanauki.pl/articles/255790.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
essential norm
integral-type operator
ʊ-Bloch space
µ-Zygmund space
Opis:
In this paper, we give an estimate for the essential norm of an integral-type operator from ω-Bloch spaces to μ-Zygmund spaces on the unit ball.
Źródło:
Opuscula Mathematica; 2018, 38, 6; 829-839
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antimicrobial effect of lining leather fatliquored with the addition of essential oils
Autorzy:
Bielak, E.
Syguła-Cholewińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/410405.pdf
Data publikacji:
2017
Wydawca:
Politechnika Łódzka. Wydawnictwo Politechniki Łódzkiej
Tematy:
lining leathers
essential oils
antimicrobial finish
leather hygienic properties
skóra wyściółkowa
olejki eteryczne
wykończenie antybakteryjne
właściwości higieniczne skór
Opis:
Footwear, especially those often and intensively used, provides an ideal environment for microbial growth. An appropriate high temperature and moisture content inside it enhance bacterial and fungal colonization by microbes. These microorganisms can be potentially pathogenic to human health and responsible for destruction of shoes materials from which the parts inside the shoe are made. In previous studies it has been shown that the addition of essential oils of antiseptic activity at leather finishing operations allows a leather to get antimicrobial properties. The aim of this paper is to assess the durability of antimicrobial effect of leather fatliquored with the addition of cinnamon, thyme and oregano essential oils at concentration of 5% per leather weight. Antimicrobial activity was evaluated according to guidelines of PN-EN ISO 20645:2006 “Textile fabrics – determination of antibacterial activity – Agar diffusion plate test” after 36-month storage. The obtained results have indicated that leathers under investigations show antimicrobial activity against E. coli, S. aureus and C. albicans strains even 3 years after fatliquoring. The use of natural bioactive substances such as cinnamon, thyme and oregano oils at concentration of 5% per leather weight in the leather finishing process may be an alternative to biocides used in the tanning industry as well it can improve hygienic properties of shoes, internal parts of which are made of such finished leathers.
Źródło:
Biotechnology and Food Science; 2017, 81, 2; 149-157
2084-0136
2299-6818
Pojawia się w:
Biotechnology and Food Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antifungal activity of essential oils on Aspergillus parasiticus isolated from peanuts
Autorzy:
Yooussef, M.M.
Pham, Q.
Achar, P.N.
Sreenivasa, M.Y.
Powiązania:
https://bibliotekanauki.pl/articles/66729.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
antifungal activity
essential oil
antifungal agent
Aspergillus parasiticus
isolate
peanut
mycelial growth inhibition
Opis:
Aspergillus parasiticus is one of the most common fungi which contaminates peanuts by destroying peanut shells before they are harvested and the fungus produces aflatoxins. The aim of this study was to evaluate the antifungal activities of seventeen essential oils on the growth of the aflatoxigenic form of A. parasiticus in contaminated peanuts from commercial outlets in Georgia. The agar dilution method was used to test the antifungal activity of essential oils against this form of A. parasiticus at various concentrations: 500; 1,000; 1,500; 2,000; 2,500 ppm. Among the seventeen essential oils tested, the antifungal effect of cinnamon, lemongrass, clove and thyme resulted in complete inhibition of mycelial growth. Cinnamon oil inhibited mycelial growth at ≥ 1,000 ppm, lemongrass and clove oils at ≥ 1,500 ppm and thyme at 2,500 ppm. However, cedar wood, citronella, cumin and peppermint oils showed partial inhibition of mycelial growth. Eucalyptus oil, on the other hand, had less antifungal properties against growth of A. parasiticus, irrespective of its concentration. Our results indicate that the aflatoxigenic form of A. parasiticus is sensitive to selected essential oils, especially cinnamon. These findings clearly indicate that essential oils may find a practical application in controlling the growth of A. parasiticus in stored peanuts.
Źródło:
Journal of Plant Protection Research; 2016, 56, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antimicrobial Activity of the Essential oil of Thymus capitatus against Helicobacter pylori
Autorzy:
güvenir, meryem
Hanoglu, Azmi
Hanoglu, Duygu
Suer, Kaya
Baser, Husnu Can
Ozkum Yavuz, Dudu
Sanlıdag, Tamer
Powiązania:
https://bibliotekanauki.pl/articles/895252.pdf
Data publikacji:
2020-02-29
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
helicobacter pylori
Thymus capitatus
in vi
essential oil
Opis:
Helicobacter pylori (H.pylori) is an infective agent and the main resourceful factor of chronic, active ot type B gastritis, peptic and duodenal ulcer, gastric carcinoma and mucosa-associated lymphoid tumors. Nowadays, pharmological treatment of H. pylori infections attract attention beside antibiotic treatment. The aim of this study is to analyse the chemical composition of the essential oils of Thymus capitatus and the antimicrobial activity against H. pylori. Aerial parts of wild growing plant materials were collected during flowering stage from three different locations. Essential oil composition analyses were performed simultaneously by GC-FID and GC-MS systems. The antimicrobial activity of the essential oil were tested by broth dilution method. The thymol percentage was determined as more than half of the essential oil composition of Thymus capitatus-Yedidalga (51.9%) and Thymus capitatus –Yıldırım (57.1%); however, the composition of thymol was 47.2% followed by 15.1% (p-cymene), 10.0% (-terpinene) and 5.7% (carvacrol) for Thymus capitatus-Boğaz/Girne.The essential oil from Thymus capitatus- Boğaz/Girne showed the lowest MIC and MBC values and the strongest bactericidal activity against H. pylori compared to the other tested essential oils. Bactericidal efficacy of essential oil of Thymus capitatus on H. pylori could have been affected due to the varied rates of major compounds. Thymus capitatus essential oil could be an alternative way for the treatment of H. pylori infections.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 1; 155-160
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical composition of Scaligeria meifolia Boiss. essential oil from Iran
Skład chemiczny olejku eterycznego Scaligeria meifolia Boiss. rosnącego w Iranie
Autorzy:
Rowshan, V.
Tarakemeh, A.
Powiązania:
https://bibliotekanauki.pl/articles/71829.pdf
Data publikacji:
2013
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
chemical composition
Scaligeria meifolia
aerial part
Apiaceae
essential oil
oil component
Iran
Opis:
Scaligeria meifolia Boiss., belonging to the Apiaceae family, grows wild in Iran. The essential oil from aerial parts of S. meifolia were obtained by hydrodistillation and analyzed by GC and GC/MS. Thirty-one constituents representing 99.98% of total oil components were identified. The main constituents of the essential oil were germacrene–D, (24.2%), germacrene-B (14.8%), limonene (14.2%), γ-elemene (11.6 %) and β-elemene (5.2%).
Scaligeria meifolia Boiss. należąca do rodziny Apiaceae, rośnie dziko w Iranie. Olejek eteryczny z nadziemnych części S. meifolia uzyskano i analizowano za pomocą GC i GC/MS. Zidentyfikowano 31 składników, co stanowi 99,98% wszystkich składników olejku. Najważniejszymi składnikami olejku eterycznego były: germakren-D (24,2%), germakren- B (14,8%), limonen (14,2%), γ-elemen (11,6%) i β-elemen (5,2%).
Źródło:
Herba Polonica; 2013, 59, 1
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Olejki eteryczne jako biocydowe składniki wulkanizatów kauczuku naturalnego
Essential oils as biocidal agents in natural rubber vulcanizates
Autorzy:
Kmiotek, M.
Bieliński, D. M.
Piotrowska, M.
Jakubowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/946842.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
kauczuki
olejki eteryczne
korozja mikrobiologiczna
rubber
essential oils
microbiological corrosion
Opis:
Wulkanizaty kauczuku naturalnego napełnionego sadzą lub kredą i usieciowanego nadtlenkiem dikumylu, modyfikowano dodatkiem różnych olejków eterycznych o potwierdzonym w literaturze działaniu biobójczym. Stwierdzono, że rodzaj użytego olejku oraz napełniacza wpływa na stopień usieciowania oraz właściwości mechaniczne wulkanizatów. Wulkanizaty modyfikowane dodatkiem olejku tymiankowego, goździkowego lub geraniowego wykazywały odporność na działanie grzybów pleśniowych, natomiast wulkanizaty modyfikowane dodatkiem olejku herbacianego, mandarynkowego lub cytronelowego charakteryzowały się zwiększoną bakteriobójczością.
Natural rubber compounds filled with carbon black or calcium carbonate and crosslinked using dicumyl peroxide, were modified by addition of various essential oils with biocidal action confirmed in the literature. It was found that the type of essential oil and filler used determines the degree of crosslinking and mechanical properties of the vulcanizates. The resistance against mould fungi was shown by vulcanizates modified with thyme, clove or geranium oil, whereas bactericidal action was observed in cases of tea tree, mandarin or lemongrass oil used as modifying agents.
Źródło:
Polimery; 2016, 61, 1; 39-45
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowe formy w dramaturgii Witkacego i wynikające stąd spory O „rozmowach istotnych”
New Forms in the Dramatic Works of Witkacy and the Resultant Disputes: On ‘Essential Conversations’
Autorzy:
Kurowska, Sara
Powiązania:
https://bibliotekanauki.pl/articles/1816630.pdf
Data publikacji:
2021-02
Wydawca:
Instytut im. Jerzego Grotowskiego we Wrocławiu
Tematy:
essentiality
essential conversations
drama
performance studies
agon
Opis:
The article attempts to present essentiality – one of the concepts used most frequently by Witkacy – as a performative category. The artist was aware that essentiality would not have the final form in the dictionary of intellectual concepts, that it could not be fixed within stable definitions, but continued his efforts to push the boundaries of the human mind as far as possible. The paper analyses Witkacy’s epistemological tactics using Anna Krajewska’s dramatic theory of literature, which draws, among other things, on the achievements of performative discourse. Seen in this perspective, Witkacy’s ‘essential conversations’ can be regarded as dramatic forms which establish essentiality in constant motion and give it the character of a processual event – of something uncertain in a state of unreadiness, something attempted.
Źródło:
Didaskalia. Gazeta Teatralna; 2021, 161; 227-254
2720-0043
Pojawia się w:
Didaskalia. Gazeta Teatralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On uniformly strongly prime Γ-semirings (II)
Autorzy:
Dutta, Tapan
Dhara, Suhrid
Powiązania:
https://bibliotekanauki.pl/articles/729133.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
Γ-semiring
uniformly right strongly prime Γ-semiring
annihilators
essential ideal
essential extension
uniformly strongly prime k-radical
matrix Γ-semiring
special class
super t-system
Opis:
The Uniformly strongly prime k-radical of a Γ-semiring is a special class which we study via its operator semiring.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2006, 26, 2; 219-231
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alterations in fatty acid composition of Cunninghamella echinulata lipids induced by orange essential oil
Autorzy:
Moustogianni, A.
Bellou, S.
Triantaphyllidou, I. E.
Aggelis, G.
Powiązania:
https://bibliotekanauki.pl/articles/363210.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
Cunninghamella echinulata
essential oil
fatty acid desaturases
glycerol
desaturaza kwasów tłuszczowych
olejek eteryczny
glicerol
Opis:
The growth of Cunninghamella echinulata on raw glycerol as sole carbon source was positively affected by the presence of essential oil (EO) of orange in the growth medium. However, significant alterations in the fatty acid composition were observed since the biosynthesis of PUFA was inhibited, especially in the late fermentation steps. Refereeing to the ratios ∆9C18:1/C18:0, ∆9,12C18:2/∆9C18:1 and ∆6,9,12C18:3/∆9,12C18:2 used as indices for ∆9, ∆12 and ∆6 desaturase activity, respectively, we suggest that in the presence of EO, the activity of ∆9 desaturase involved in the desaturation of stearic acid was significantly increased. During this process both ∆12 and ∆6 desaturases involved in the desaturation of oleic and linoleic acids, respectively, decreased. We conclude that EO could be used for the in vivo modification of microbial lipids.
Źródło:
Environmental Biotechnology; 2014, 10, 1; 1-7
1734-4964
Pojawia się w:
Environmental Biotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Perturbation theory, M-essential Spectra of 2 x 2 operator matrices and application to transport operators
Autorzy:
Jeribi, Aref
Moalla, Nedra
Yengui, Sonia
Powiązania:
https://bibliotekanauki.pl/articles/2052375.pdf
Data publikacji:
2021
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
operator matrices
essential spectrum
Fredholm perturbation
transport equation
macierz operatora
widma
perturbacja Fredholma
równanie transportu
Opis:
In this article we give some results on perturbation theory of 2 x 2 block operator matrices on the product of Banach spaces. Furthermore, we investigate their M-essential spectra. Finally, we apply the obtained results to determine the M-essential spectra of two group transport operators with general boundary conditions in the Banach space $L_{p}([-a, a] \times [-1, 1]) \times L_{p}([-a, a] x [-1, 1]), p \geq 1 and a > 0$.
Źródło:
Journal of Mathematics and Applications; 2021, 44; 35-55
1733-6775
2300-9926
Pojawia się w:
Journal of Mathematics and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the composition and fungicidal activity of essential oils from fennel fruits cultivated in Poland and Egypt
Autorzy:
Wodnicka, Alicja
Huzar, Elżbieta
Dzięcioł, Małgorzata
Krawczyk, Maria
Powiązania:
https://bibliotekanauki.pl/articles/779276.pdf
Data publikacji:
2019
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
fennel essential oil
Foeniculum vulgare Mill
fungicidal activity
trans-anethole
estragole
Opis:
The yield, composition and fungicidal activity of essential oils obtained from fennel fruits cultivated in Poland (FEOPOL) and Egypt (FEO-EG) were compared. The influence of the duration of hydrodistillation using a Clevenger apparatus on the essential oil yield was studied. The composition of the fennel essential oils was determined by GC-MS method. Studies have shown that FEO-POL and FEO-EG are two distinct chemotypes, which differ in yield and composition. The fennel fruits cultivated in Poland contained 4.14% of essential oil with trans-anethole as a main component. The plant material from Egypt was characterised by low content of essential oil (1.32%) with a predominant share of estragole. The fungicidal activity was tested in vitro against ten species of pathogenic fungi. The best result for FEO-POL was achieved against Sclerotinia sclerotiorum, Rhizoctonia solani and Botrytis cinerea. Antifungal activity of FEO-EG against tested fungi was weak or none.
Źródło:
Polish Journal of Chemical Technology; 2019, 21, 2; 38-42
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the effectiveness of selected essential oils with mineral oil and spinosad on Dermanyssus gallinae
Autorzy:
Roczeń-Karczmarz, M.
Demkowska-Kutrzepa, M.
Zdybel, J.
Szczepaniak, K.
Studzińska, M.
Tomczuk, K.
Powiązania:
https://bibliotekanauki.pl/articles/16539169.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Dermanyssus
mite
essential oil
mineral oil
spinosad
Opis:
It seems that essential oils can be a good ingredient in effective preparations against Dermanyssus gallinae. Dermanyssus affects animal health leading to financial losses and bird welfare issues. Collected mites were treated with various essential oils in four (20, 50, 80 and 100%) concentrations at a dose of 0.28 mg/cm2. The direct toxicity of the essential oils, mineral oil and spinosad to D. gallinae was tested in the laboratory. Eucalyptus oil was the most toxic essential oil in all concentrations to D. gallinae (87.6 - 97.6% mortality at all four concentrations), while geranium, pine and rosemary oils showed mortality rates of 14.2 - 68.2%. High mortality after 48 hours of contact was also recorded for the oil of cloves at 80% dilution (85.1% mortality), lavender 100% (94.2% mortality). Similarly, the thyme essential oil produced 83.5 - 93.2% mortality in three concentrations: 50, 80 and 100%. The mineral oil was the least effective oil against mites. Spinosad showed high effectiveness against D. gallinae.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 2; 261-268
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antioxidant and antimicrobial activity of essential oils extracted from aromatic plants
Autorzy:
Yahaya, Muhammad F.
Kubmarawa, Dimas
Yelwa, Jibrin M.
Runde, Musa
Powiązania:
https://bibliotekanauki.pl/articles/1162022.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Antimicrobial
Antioxidant
Cananga odorata
Citrus limon
Essential oils
Phytochemical screening
Vitex trifolia
bioactive agents and Alkaloids
Opis:
The antimicrobial and antioxidant activities of extracted essential oils in some aromatic plants were determined. Phytochemical screening was conducted using standard qualitative techniques, while the essential oils was extracted from the Citrus limon linn leaf, Vitex trifolia seed and Cananga odorata by modified steam distillation apparatus. Furthermor, the plant materials were tested using Antioxidant activity and Antimicrobial activity test. Citrus limon linn produced large volume essential oil (1.4 ml), Vitex trifola (0.7 ml) and Cananga odorata (0.5 ml) after 3hours of steam distillation. Antioxidant activities test using DPPH method reveals that all the essential oil determined showed positive effect, but the oil extracted from Citrus limon linn leaf could be a better antioxidant than that of Vitex tifolia and Cananga odorat when compared to commercial Ascorbic acid. The antioxidant activities of the essential oils of different plants under investigation showed a variation which may be as a result of the difference in their chemical compositions. Antimicrobial activities showed that all the essential oils were inhibited on the entire five microorganisms being used. However, Citrus limonlinn showed highest inhibition on the organisms (E. coli, S. typhi C. Kleb, P. avengunosa and S. aureus) compared to Cananga odorata and Vitex trifolia.
Źródło:
World Scientific News; 2018, 111; 13-25
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of water stress on growth, essential oil, and chemical composition of herbs [Ocimum sp.]
Autorzy:
Khalid, K.A.
Powiązania:
https://bibliotekanauki.pl/articles/25982.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
herb
vegetative growth
Ocimum americanum
Labiatae
Ocimum basilicum
herb plant
essential oil
seedling
Ocimum
chemical composition
growth
water stress
Źródło:
International Agrophysics; 2006, 20, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The development of technology for obtaining essential oils from Scots pine tree foliage
Rozwój technologii pozyskiwania olejków eterycznych z drzew sosny
Autorzy:
Daugavietis, M.
Spalvis, K.
Powiązania:
https://bibliotekanauki.pl/articles/8606.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
technological development
essential oil
Scotch pine
tree
foliage
needle
steam
distillation
consumption
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2014, 87
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Copper - an essential micronutrient for calves and adult cattle
Autorzy:
Wysocka, D.
Snarska, A.
Sobiech, P.
Powiązania:
https://bibliotekanauki.pl/articles/15105.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:
Journal of Elementology; 2019, 24, 1
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical Composition and Antimicrobial Activity of Essential Oil of Wild and Cultivated Rosmarinus Officinalis from Two Moroccan Localities
Autorzy:
Elyemni, Majda
El Ouadrhiri, Faiçal
Lahkimi, Amal
Elkamli, Taha
Bouia, Abdelhak
Eloutassi, Noureddine
Powiązania:
https://bibliotekanauki.pl/articles/2068472.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
essential oil
Rosmarinus officinalis
antimicrobial activity
chemotype
Opis:
This research aimed to measure the impact of provenance on the yield, chemical profile and antimicrobial activity of Rosmarinus officinalis essential oil (EO) collected from cultivated and wild plants from two different regions in Morocco (Fez and Figuig). The chemical composition analysis was accomplished utilizing the GC-MS techniques. Sixteen compounds were identified in the EO of both samples, dominated by 1,8-cineole (32.18%), camphor (16.20%) and α-pinene (15.40%) in cultivated type. The α-pinene (51.19) presents the majority compound in the rosemary samples collected from the wild populations.The antimicrobial activity was investigated by using the broth dilution methods against yeast, four bacterial strains and two molds. Rosemary aerial part provided EO with the highest yield and comes from Figuig. The GC-MS analysis demonstrated the existence of two chemotypes of oils: α-pinene as well as 1,8-cineole/camphor/α-pinene. Both EOs showed good antimicrobial activity against all microbial strains. The essential oil produced by Fez plants was the most effective against the selected microorganisms having MIC values of 0.315–2.5 mg/L.
Źródło:
Journal of Ecological Engineering; 2022, 23, 3; 214--222
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niezbędny język (La langue nécessaire)
The essential language (La langue nécessaire)
Autorzy:
Devi, Ananda
Jarosz, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2194864.pdf
Data publikacji:
2020-11-20
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Opis:
Tłumaczenie z języka fracuskiego tekstu Anandy Devi.
Translation of Ananda Devi's text The essential language.
Źródło:
Śląskie Studia Polonistyczne; 2020, 16, 2; 1-10
2084-0772
2353-0928
Pojawia się w:
Śląskie Studia Polonistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Insecticidal activity and chemical composition of essential oil from Artemisia judaica L. against Callosobruchus maculatus (F.) (coleoptera: bruchidae)
Autorzy:
Abd-Elhady, H.K.
Powiązania:
https://bibliotekanauki.pl/articles/961654.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
essential oil
artemisia judaica
insecticidal activity
callosobruchus maculatus
chemical composition
gas chromatographymass spectrometry (gc/ms) analysis
Opis:
The insecticidal properties of essential oil derived via the hydro-distillation method from aerial parts of Artemisia judaica L. were tested against the cowpea weevil, Callosobruchus maculatus (Fab.) (Coleoptera: Bruchidae). The repellent activity assay of essential oil against C. maculates adults indicated that in concentrations of 63.7, 31.9, 15.9, 8.0 or 4.0 μg/cm2, the oil reduced egg laying by 92.5, 86.0, 61.8, 42.7 and 12.5%, respectively. Also, the residual-film assay showed that after 72 hours of treatment, concentrations of 50 and 40% were highly effective against the C. maculates adults. The sub-lethal effects of essential oil were investigated on fecundity and F1 progany by exposing adult females to treated seeds. Both LC25 and LC50 of essential oil significantly reduced F1 progany production compared to the control. The chemical composition of the essential oil was analyzed by GC-MS and the resulting oil piperitone (32.4%), camphor (20.6%) and (E)-ethyl cinnnamate (8.2%) were found to contain the major constituents of the oil. This provided the insecticidal properties of the essential oil against cowpea weevil.
Źródło:
Journal of Plant Protection Research; 2012, 52, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kłopoty z istotą. O pewnych istotnych i nieistotnych pojęciach „istoty” (w nawiązaniu do ks. Jana Salamuchy)
The Troubles with Essence. On Some Essential and Non-essential Concepts of "Essence" (with Reference to Rev. Jan Salamucha)
Autorzy:
Jadacki, Jacek J.
Powiązania:
https://bibliotekanauki.pl/articles/1918564.pdf
Data publikacji:
2020-11-16
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Opis:
The author considers three groups of concepts of essence, defines them in the modified language of functional calculus and classes calculus, points out connections between them, analyses their difficulties and presents the concepts derived from "essence". These groups are as follows:1. Three non-essential concepts of "essence" (found in works by Arystoteles, M. A. Krąpiec, T. Czeżowski, A. B. Stępień), i.e.:(i) essence as any property of the object:∧ x ∧ I (I is the essence of x ≡ I x);(ii) essence as the necessary property of the object:∧ x ∧ I is the essence of x ≡ ∧ y [(x = y) → Iy] ;(iii) essence as all properties of the object:∧ x ∧ I I is the essence of x ≡ ∧ P [Px ≡ (P ∈ I) .2. One more essential concept of "essence" (Rev. J. Salamucha, and also: Arystoteles, St. Thomas Aquinas, K. Ajdukiewicz, A. B. Stępień), i.e. essence as the property «common» to all object of the given group (and only to these objects):∧ x ∧ I I is the essence of x as Z ≡ [(x ∈ Z) →/← Ix] .3. Two the most essential concepts of "essence" (K. Ajdukiewicz, T. Kotarbiński), i.e.:(i) the simple essence as a «common» and «characteristic» property (see 2.), from which the other important («characteristic») properties result:∧ x ∧ I ∧ Z ⟨I is the simple essence of x as Z ≡ [(x ∈ Z ≡ Ix] ∧ y ∧ PW [y ∈ Z) → Pwy] → (Iy → PWy) ⟩;(ii) the complex essence as the constitutive intension of a name:∧ x ∧ I ∧ Z ∧ P ∧ Q ⟨I is the complex essence of x as Z ≡ [(x ∈ Z) ≡ Ix] ∼ ∨ P ∧ Q {[Q = (I − P)] → ∧ y [(y ∈ Z ≡ Qy] ⟩.
Źródło:
Roczniki Filozoficzne; 1996, 44, 1; 21-31
0035-7685
Pojawia się w:
Roczniki Filozoficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Toxicity and physiological effect of essential oil of Artemisia annua (Labiatae) on Agriolimax agrestis L. (Stylommatophora: Limacidae)
Autorzy:
Amirmohammadi, F.
Sendi, J.J.
Zibaee, A.
Powiązania:
https://bibliotekanauki.pl/articles/66768.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
toxicity
physiological effect
essential oil
Artemisia annua
Labiatae
slug
Agriolimax agrestis
Stylommatophora
Limacidae
biochemical component
Opis:
Essential oil of Artemisia annua L. was investigated to find out its toxicity and physiological aspects on the slug Agriolimax agrestis, in controlled conditions (8±1°C, 75±5 RH and 14:10 LD). The slugs received different concentrations of essential oil treated radish leaves in methanol, while the control received methanol alone. LC10, LC30, LC50 and LC90 values were estimated at 4.67, 5.3, 5.81, 7.25%, respectively. The effect of the essential oil on some important enzymatic components like; cytochrome P450 monnooxygenase, acid phosphatase, alkaline phosphatase, lipase, amylase and protease were significantly increased compared to the control. These results indicate that the plant Artemisia annua L. not only shows toxicity but also shows some irreversible effect on some important biochemical components and deserves further investigation.
Źródło:
Journal of Plant Protection Research; 2012, 52, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wrażliwość na olejki eteryczne środowiskowych lekoopornych szczepów Escherichia coli
Sensitivity to the essential oils of environmental, resistant to drugs strains of Escherichia coli
Autorzy:
Krzyśko-Łupicka, T.
Mysłek, M.
Błaszczyk, K.
Powiązania:
https://bibliotekanauki.pl/articles/126593.pdf
Data publikacji:
2015
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
Escherichia coli
antybiotykooporność
olejki eteryczne
antibiotic resistance
essential oils
Opis:
W środowisku coraz powszechnej stwierdzana jest obecność lekoopornych szczepów Escherichia coli. Alternatywną drogę ich eliminacji mogą stanowić biodegradowalne i nietoksyczne substancje, między innymi olejki eteryczne. Celem pracy była ocena działania olejków eterycznych na środowiskowe lekooporne szczepy Escherichia coli. Materiał badawczy stanowiło 10 wyizolowanych ze środowiska naturalnego lekooopornych szczepów E. coli, w tym 8 glukuronidazo-dodatnich. Wrażliwość szczepów na takie antybiotyki, jak: ampicylina, amoksycylina, cefotaksym, chloramfenikol, cyprofloksacyna, ceftazydym, doksycyklina, gentamycyna, kanamycyna, trimetoprim, tetracyklina, streptomycyna, kwas nalidyksowy oraz na sulfonamidy, oznaczono na podłożu Mueller-Hinton. Metodą dyfuzyjną płytkowo-cylinderkową oceniono wrażliwość szczepów na olejki: tymiankowy, oregano, herbaciany, lemongrasowy, cytrynowy i kminkowy oraz tymol w stężeniach 1,5%; 1,0%; 0,5%; 0,25%. Na podstawie uzyskanych wyników stwierdzono, że testowane szczepy E. coli wykazywały oporność na co najmniej połowę testowanych antybiotyków, a 90% z nich było oporne na ampicylinę i amoksycylinę. Także wrażliwość szczepów na testowane olejki eteryczne była zróżnicowana. Tylko olejek tymiankowy w stężeniach 1 i 1,5% zahamował rozwój 90% badanych szczepów E. coli. Olejki herbaciany, lemongrasowy, cytrynowy, oregano i kminkowy w testowanych stężeniach nie hamowały rozwoju testowanych szczepów Escherichia coli.
In an environment increasingly common finding is the presence of antibiotic-resistant strains of Escherichia coli. An alternative way to eliminate them can provide biodegradable and non-toxic substances, including essential oils. The aim of this study was to evaluate the effect of essential oils on environmental, antibiotic-resistant strains of Escherichia coli. The research material consisted of 10 isolated from the environment, antibiotic-resistant strains of E. coli, including 8 glucuronidase-positive. Using the Mueller-Hinton medium was evaluated the sensitivity to antibiotics such as ampicillin, amoxicillin, cefotaxime, chloramphenicol, ciprofloxacin, ceftazidime, doxycycline, gentamycin, kanamycin, trimethoprim, tetracycline, streptomycin, nalidixic acid and sulfonamides. Using the platelet-cylinders diffusion method was assessed the sensitivity of the strains on essential oils: thyme, oregano, tea tree, lemongrass, lemon, and caraway, at concentrations of 1.5%; 1.0%; 0.5%, 0.25%. Based on the results, it was found that the tested strains of E. coli were resistant to at least half of the used antibiotics and 90% of them showed resistance to ampicillin, and amoxicillin. Also, the sensitivity of the strains to tested essential oils has been diverse. Only thyme oil in a concentration of 1.5% inhibited growth of 90% of the tested strains of E. coli. On the other hand, oregano oil in a concentration of 1.5% inhibited the development of 3 out of 10 tested strains. Oils of tea, lemongrass, lemon and caraway, at the mentioned concentrations have been not bactericidal against strains of Escherichia coli.
Źródło:
Proceedings of ECOpole; 2015, 9, 2; 633-639
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of water stress and nitrogen fertilizer on herb and essential oil of oregano
Autorzy:
Said-Al, Ahl H A H
Omer, E.A.
Naguib, N.Y.
Powiązania:
https://bibliotekanauki.pl/articles/26613.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
water stress
nitrogen fertilizer
herb
essential oil
oregano
Origanum vulgare
fresh herb yield
Źródło:
International Agrophysics; 2009, 23, 3; 269-275
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quality assessment of the essential oil from Eucalyptus globulus Labill of Blida (Algeria) origin
Autorzy:
Boukhatem, M. N.
Amine, F. M.
Kameli, A.
Saidi, F.
Walid, K.
Mohamed, S. B.
Powiązania:
https://bibliotekanauki.pl/articles/411538.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Eucalyptus globulus Labill
Chemical composition
Essential oil
Gas Chromatography
Eucalyptol
Opis:
Despite the reputation earned by aromatic and medicinal plants of Algeria, the chemical constituents of Eucalyptus globulus essential oil (EGEO) of Blida origin has not previously been investigated. Thus, the present study has been conducted for the determination of chemical constituents and different physico-chemical properties of the EGEO. Chemical composition of the EGEO, grown in Algeria, was analysed by Gas Chromatography-Mass Spectrometry. The chemical components were identified on the basis of Retention Time and comparing with mass spectral database of standard compounds. Relative amounts of detected compounds were calculated on the basis of GC peak areas. Fresh leaves of E. globulus on steam distillation yielded 0.96 % (v/w) of essential oil whereas the analysis resulted in the identification of a total of 11 constituents, 1.8 cineole (85.8 %), α-pinene (7.2 %), and β-myrcene (1.5 %) being the main components. Other notable compounds identified in the oil were β-pinene, limonene, α-phellandrene, γ-terpinene, linalool, pinocarveol, terpinen-4-ol, and α-terpineol. The physical properties such as specific gravity, refractive index and optical rotation and the chemical properties such as saponification value, acid number and iodine number of the EGEO were examined. The oil extracted has been analyzed to have 1.4602 - 1.4623 refractive index value, 0.918 - 0.919 specific gravity (sp.gr.), +9 - +10 optical rotation that satisfy the standards stipulated by European Pharmacopeia. All the physical and chemical parameters were in the range indicated by the ISO standards. Our findings will help to access the quality of the Eucalyptus oil which is important in the production of high value essential oils that will help to improve the economic condition of the community as well as the nation.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 17, 3; 303-315
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
WAŻNE PRZYCZYNY WYŁĄCZENIA „TRUDNEGO” WSPÓLNIKA ZE SPÓŁKI Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ
ESSENTIAL REASONS FOR THE EXPULSION OF A CONFRONTATIONAL PARTNER FROM A LIMITED LIABILITY COMPANY
Autorzy:
Jarnutowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/550715.pdf
Data publikacji:
2018
Wydawca:
Wyższa Szkoła Biznesu i Przedsiębiorczości w Ostrowcu Świętokrzyskim
Tematy:
wspólnik
wyłączenie
ważne powody
spółka
artner (shareholder)
essential reasons
limited liability company (LLC) expulsion
Opis:
Praktyka obrotu gospodarczego dostarcza licznych przykładów, gdy prawidłowe działanie spółki zaburzone jest przez jednego lub kilku wspólników. Niejednokrotnie dochodzi do sytuacji, w których jeden wspólnik nie potrafi porozumieć się z pozostałymi, paraliżuje rozwój działalności spółki poprzez uporczywe zasypywanie zarządu spółki najróżniejszymi pismami i wnioskami oraz inicjowaniem szeregu bezzasadnych postępowań przy wykorzystaniu wszelkich możliwych organów władzy publicznej, urzędów, instytucji i organów wymiaru sprawiedliwości. W niniejszym opraco-waniu podejmę próbę zdefiniowania pojęcia „ważne przyczyny” w oparciu o stanowisko doktryny i judykatury. Ponadto spróbuję określić granice powyższego pojęcia. W publikacji rozważę również, z czyjego punktu widzenia należy oceniać ważność przyczyn stanowiących podstawę do wyłączenia wspólnika ze spółki. Innymi słowy, czy przyczyny te winny być ważne dla spółki, wspólnika, który podlega ewentu-alnemu wyłączeniu, czy może dla wspólników żądających wyłączenia?
The practice of economic turnover provides a lot of examples when the company's proper activity is disturbed by one or more partners. Sometimes, there are situations when one partner, cannot communicate with the rest board and paralyses the company activity through various letters or submissions and start unnecessary legal proceedings by using all available public institutions and organisations of the judicature. In my article, I will try to define the term "important reasons "based on the current position of doctrine and judicature. Furthermore, I will try to determine the boundaries of the above topic. In my publication, I will also consider from what point of view it should judge the validity of the reasons for expulsion the partner from the partnership.
Źródło:
Acta Scientifica Academiae Ostroviensis. Sectio A, Nauki Humanistyczne, Społeczne i Techniczne; 2018, 12(2)/2018; 109-122
2300-1739
Pojawia się w:
Acta Scientifica Academiae Ostroviensis. Sectio A, Nauki Humanistyczne, Społeczne i Techniczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oddziaływanie naturalnych olejków eterycznych na wzrost Phytophthora spp. – patogenów wyizolowanych z sadzonek pelargonii
The influence of natural essential oils on the growth of Phytophthora spp. Isolated from pelargonium cuttings
Autorzy:
Machura, M.
Kurzawińska, H.
Powiązania:
https://bibliotekanauki.pl/articles/399722.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
olejki eteryczne
pelargonia
Phytophthora spp.
essential oils
pelargonium
Opis:
Rośliny ozdobne odgrywają ważną rolę w życiu człowieka, pozytywnie wpływają na psychikę i poprawiają samopoczucie przebywających w ich otoczeniu ludzi. Rośliny produkują tlen, stanowią barierę dla kurzu i hałasu, obniżają temperaturę i zwiększają wilgotność powietrza, przez co pozytywnie oddziałują na mikroklimat. Niezmienna atrakcyjność pelargonii, łatwość w uprawie i pielęgnacji, obfitość kwitnienia od wiosny aż do późnej jesieni i jej walory dekoracyjne sprawiają, że znajduje ona wszechstronne zastosowanie. Celem badań było określenie składu gatunkowego zasiedlającego chore sadzonki pelargonii, identyfikacja wyosobnionych izolatów grzybowych i organizmów grzybopodobnych, zbadanie chorobotwórczości wybranych izolatów oraz ocena w warunkach in vitro wpływu wybranych olejków (kminkowy, cytrynowy, mandarynkowy i z drzewa herbacianego) na wzrost liniowy grzybni: Phytophthora cryptogea i Ph. nicotianae var. nicotianae. Jako standardowy preparat chemiczny zastosowano Previcur Energy 840 SL. Spośród wyizolowanych mikroorganizmów zasiedlających chore rośliny pelargonii najczęściej występowały gatunki rodzajów: Phytophthora, Fusarium, Botrytis, Cylindrocladium, Alternaria i Cylindrocarpon. Najwyższą skutecznością w stosunku do Ph. cryptogea Ph. nicotianae var. nicotianae charakteryzował się olejek cytrynowy (stężenie 0,1%, 1%) oraz olejek kminkowy zastosowany w stężenie 1%.
Ornamental plants play an important role in human life. Plants positively influence the psyche and improve the well-being of people around them. They produce oxygen, provide a barrier to dust and noise, lower the temperature and increase air humidity, thereby positively impacting the microclimate. The unmatched appeal of pelargonium, ease of cultivation and care, abundance of flowering from spring to late autumn and its decorative qualities make it a universal application. The aim of the study was to isolate the microorganisms that inhabit the cuttings of pelargonium, identify fungal isolates, investigate the pathogenicity of selected isolates and evaluate the influence of certain essential oils (Carum carvi L. essential oils, Citrus limon L. essential oils, Citrus reticulatae aetheroleum essential oils, essential oil of tea tree ) in in vitro circumstances on the linear growth of the mycelium: Phytophthora cryptogea, Phytophthora nicotianae var. nicotianae. Previcur Energy 840 SL was used as a standard chemical protection. The most numerous isolated fungi were: Phytophthora, Botrytis, Cylindrocladium, Alternaria and Cylindrocarpon. The highest efficiency in relation to Phytophthora cryptogea characterized the Citrus limon L. essential oils (concentration 0.1% and 1%) and Carum carvi L. essential oil (concentration 1%).
Źródło:
Inżynieria Ekologiczna; 2017, 18, 5; 84-91
2081-139X
2392-0629
Pojawia się w:
Inżynieria Ekologiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Different variations of using essential oils in several animal species: treatment and supplementation
Możliwości wykorzystania olejków eterycznych u różnych gatunków zwierząt: leczenie i suplementacja
Autorzy:
Padzik, N.
Szewczuk, M.
Sablik, P.
Powiązania:
https://bibliotekanauki.pl/articles/2606369.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
essential oil
veterinary medicine
utilization
animal species
animal treatment
supplementation
Źródło:
Acta Scientiarum Polonorum. Zootechnica; 2018, 17, 3; 3-8
1644-0714
Pojawia się w:
Acta Scientiarum Polonorum. Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of chromium on ruminant health
Autorzy:
Zarczynska, K.
Krzebietke, S.
Powiązania:
https://bibliotekanauki.pl/articles/1192470.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
chromium
ruminants
essential nutrient
toxicity
Opis:
Chromium (Cr) is a micronutrient that occurs in the natural environment in different oxidation states. Natural compounds contain chromium in the +3 oxidation state, whereas chromic(VI) acid derivatives are industrial products with strong toxicity. Hexavalent chromium compounds can adversely affect the respiratory system and the gastrointestinal tract, cause skin changes, and exert carcinogenic, mutagenic, embryotoxic as well as teratogenic effects. Research indicates that both organic and inorganic trivalent chromium compounds improve carbohydrate, lipid, and protein metabolism. These compounds are found in many enzymes, and they influence antioxidant processes, regulation of immune responses, and the secretion of hormones and selected vitamins in the body. In animals, Cr has been found to increase fat-free body mass, improve reproductive parameters, enhance growth, increase feed conversion efficiency, boost immunity, and decrease mortality. It has been suggested that Cr supplements can intensify the effects of insulin, decrease the plasma levels of non-esterified fatty acids (NEFAs), decrease triglyceride concentrations in the liver, and improve glucose tolerance, thus improving the performance and productivity of cattle in the perinatal period. Symptoms of chromium deficiency, including decreased feed intake, lower weight gains, reproductive disorders, and higher lipid levels, are observed in cattle fed diets that are low in this nutrient, and in animals that are exposed to considerable and prolonged stress. In ruminants, chromium supplementation is recommended during thermal stress, in the perinatal period, and during infections.
Źródło:
Journal of Elementology; 2020, 25, 3; 893-903
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czy nadszedł czas wielkich pytań?
Has the Time Come for Essential Questions?
Autorzy:
Zanussi, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/964200.pdf
Data publikacji:
2009-05-15
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
science
theology
Opis:
One thing we cannot do is failing to address the issue of ‘what next’? Where are we heading? What are our objectives on the horizon of dreams and not short-term solutions? Where is mankind heading as a whole? It is you economists and managers I am aiming my questions at. I am incapable of finding a clear answer but I sincerely hope to discover it in your dissertations (going beyond your master, doctorate and habilitation theses). Thanks to the brilliant paradigm, our civilisation has made achievements which it tends to forget. Mankind today is living more comfortably than ever before. I want to raise a question if we are conscious of the fact that our privileges should be shared by all inhabitants of our planet. I wish to reflect on the good of a man – what does a human need to be fulfilled in all dimensions, not in the mere material one. How do we conceive of the future organization and identity of mankind? I asked school principals: Is it good to allow the sexes to become alike, to see women become masculine and men effeminate? Is the contrast of the sexes vital to the preservation of the human race? Does the tension resulting from the diversification matter? I do not intend to present my own intuitions; my wish would be finding some answers in humanities. Sadly, doctorate and habilitation theses tend to focus on marginal issues. Why does contemporary theology differ so considerably from what the contemporary world, contemporary physics or mathematics deal with on a regular basis?
Źródło:
Annales. Etyka w Życiu Gospodarczym; 2009, 12, 2
1899-2226
2353-4869
Pojawia się w:
Annales. Etyka w Życiu Gospodarczym
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of the essential oil from cone-berries of Juniperus communis L. (Cupressaceae)
Charakterystyka olejku eterycznego uzyskiwanego z szyszkojagód jałowca pospolitego Juniperus communis L. (Cupressaceae)
Autorzy:
Majewska, E.
Kozłowska, M.
Kowalska, D.
Gruczynska, E.
Powiązania:
https://bibliotekanauki.pl/articles/72358.pdf
Data publikacji:
2017
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
essential oil
Juniperus communis
Cupressaceae
folk medicine
Opis:
Juniperus communis L. (Cupressaceae) is a plant widely cultivated in the Northern hemisphere. Juniper berries, the fruit of Juniperus communis L. are a highly valued, essential oil-rich plant material used traditionally in folk medicine as antiseptic, diuretic, antirheumatic, anti-inflammatory, antibacterial and antifungicidal agent. This paper reviews information on extraction methods of the essential oil from the juniper berries, its chemical composition and antimicrobial as well as antioxidant properties.
Jałowiec pospolity Juniperus communis L. (Cupressaceae) jest rośliną powszechnie występującą na całej półkuli północnej. Szyszkojagoda jałowca jest surowcem roślinnym dostarczającym cennego olejku eterycznego wykorzystywanego głównie w lecznictwie jako środek o właściwościach bakteriobójczych, moczopędnych, przeciwzapalnych, przeciwreumatycznych oraz przeciwgrzybiczych. W pracy przedstawiono charakterystykę olejku eterycznego uzyskiwanego z szyszkojagód jałowca pospolitego, metody jego ekstrakcji, skład chemiczny oraz właściwości przeciwbakteryjne i przeciwgrzybicze, jak również przeciwutleniające.
Źródło:
Herba Polonica; 2017, 63, 3
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Activity of selected essential oils on spoiling fungi cultured from Marzolino cheese
Autorzy:
Nardoni, S.
D'Ascenzi, C.
Caracciolo, I.
Mannaioni, G.
Papini, R.A.
Pistelli, L.
Najar, B.
Mancianti, F.
Powiązania:
https://bibliotekanauki.pl/articles/2081687.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Tematy:
essential oils
mixtures
cheese
spoiling fungi
Penicillium funiculosum
Mucor racemosus
Opis:
Microscopic fungi can be present on a variety of foodstuff, including cheese. They can be responsible for fungal spoilage, causing sensory changes making food unacceptable for human consumption, and posing severe health concerns. Furthermore, some of these organisms are able to resist antimicrobial preservatives provided for by law. Antifungal activity of 15 chemically defined EOs, alone and in mixture, were checked by a microdilution test against isolates of Penicillium funiculosum and Mucor racemosus cultured from rinds of Marzolino, a typical Italian fresh pecorino cheese. Origanum vulgare yielded the lowest MIC values, followed by Salvia sclarea, Ocimum basilicum and Cymbopogon citratus, while Citrus paradisi and Citrus limon were not active. All mixtures showed antifungal activity at lower concentration with respect to MIC values of each EO component, when not in combination. This study is the first to describe the setting up of EOs mixtures to limit spoiling moulds.
Źródło:
Annals of Agricultural and Environmental Medicine; 2018, 25, 2; 280-284
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Losses of essential oils and antioxidants during the drying of herbs and spices. A review
Straty olejków eterycznych oraz związków o właściwościach przeciwutleniających podczas suszenia ziół i przypraw. Przegląd
Autorzy:
Prusinowska, R.
Smigielski, K.
Powiązania:
https://bibliotekanauki.pl/articles/5330.pdf
Data publikacji:
2015
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
essential oil
antioxidant
polyphenol
loss
drying
herb
spice
Opis:
Drying is the most common and also the simplest method of preserving fresh plant materials. This process greatly extends the life of the product by the removal of water, which decreases the rate of chemical and enzymatic reactions, or even inhibits them. The drying step can cause a change in appearance, taste, color and consistency, as well as reduce the quantity of essential oils, polyphenols, pigments and vitamins. These changes can be significantly reduced by using suitable drying techniques, depending on the material. The choice of the technique should be based on knowledge of the biological, physical and chemical characteristics of the raw material. The paper presents the effects of drying on the quantitative loss of essential oils and compounds with antioxidant properties, as well as changes in the antioxidant properties of selected herbs and spices dried by different methods. Both, the food industry and the cosmetics or pharmaceuticals industry generates a demand for high-quality raw materials, and hence research is being conducted both on preservation methods and on their impact on the quality of the obtained material. It seems that the new technology of drying material in a fluidized bed, greatly reduces or even eliminates the disadvantages of current procedures.
Suszenie jest najczęściej stosowaną i zarazem najprostszą metodą konserwacji świeżych surowców roślinnych. Proces ten znacznie przedłuża trwałość produktu, poprzez usunięcie wody, co zmniejsza szybkość bądź nawet hamuje reakcje chemiczne i enzymatyczne. Etap suszenia może powodować zmiany w wyglądzie, smaku, kolorze czy konsystencji, jak również obniżać ilość olejków eterycznych, polifenoli, barwników czy witamin. Zmiany te można w znacznym stopniu ograniczyć, stosując odpowiednie techniki suszenia w zależności od suszonego materiału, których dobór powinien wynikać ze znajomości biologicznych, fizycznych i chemicznych właściwości surowca. W pracy przedstawiono wpływ suszenia na straty olejków eterycznych i związków o właściwościach przeciwutleniających oraz zmiany właściwości antyoksydacyjnych wybranych ziół i przypraw, suszonych różnymi metodami. Zarówno przemysł spożywczy jak i kosmetyczny czy farmaceutyczny, wykazuje zapotrzebowanie na surowce wysokiej jakości, i stąd wskazane jest prowadzenie badań zarówno nad metodami utrwalania jak i nad określeniem ich wpływu na jakość uzyskanego surowca. Wydaje się, że nowa technologia suszenia surowców w złożu fluidalnym w znacznym stopniu ogranicza a nawet eliminuje wady obecnie stosowanych procedur.
Źródło:
Nauki Inżynierskie i Technologie; 2015, 2(17)
2449-9773
2080-5985
Pojawia się w:
Nauki Inżynierskie i Technologie
Dostawca treści:
Biblioteka Nauki
Artykuł
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