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Wyszukujesz frazę "eucalyptus" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Seasoning Characteristics and Potential uses of Eucalyptus pilularis, Eucalyptus viminalis and Trichilia dregeana lumber tree species
Autorzy:
Kaba, Gemechu
Desalegn, Getachew
Powiązania:
https://bibliotekanauki.pl/articles/1031739.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Eucalyptus pilularis
Eucalyptus viminalis
Lumber quality
Trichilia dregeana
moisture content
seasoning
seasoning defects
shrinkage characteristics
timber species
Opis:
Technical information on lumber seasoning, moisture content (MC), density, mechanical, workability and chemical characteristics would strongly determine rational utilization of each lumber species. A study was conducted on home-grown two Eucalyptus species (Eucalyptus pilularis and Eucalyptus viminalis) and one indigenous (Trichilia dregeana) timbers with the main objective of determining some characteristics of lumber that will indicate quality and proper utilization. Study species were harvested from Shashemene, Asella and Arjo sites, respectively. The experimental design for seasoning and density was complete randomized design, a factorial experiment. The experiments were conducted using air and kiln seasoning methods. To determine initial moisture content oven drying method was used. The mean initial MC for the three timber species were 48.25%, 56.1% and 65.45%, respectively. The species were classified as very rapid seasoning rate during kiln seasoning. The mean shrinkage values were Tangential (6.31, 4.94 and 4.43%), radial (3.4, 4.02 and 2.10%) volumetric (9.46, 8.6 and 6.37%), when they seasoned from green to 12% MC, respectively. Seasoning defects such as cup, bow, crook, end split, surface and end-checks were observed, though the extent varies with species. The density of E. pilulalris, E. viminalis and T. dregeana at 12% MC was 780, 810 and 530 Kg/m3, respectively. The one-way analysis of variance indicated that there was significant difference (P>0.001) in initial MC, final MC, density values at different MC and shrinkage characteristics. They revealed good lumber characteristics and qualities, comparable with many indigenous and home-grown exotic timber species in density, seasoning rate and shrinkage. The tree species have to be well managed, properly harvested and sawn. Boards have to be properly stacked and seasoned to about 12% MC, with kiln and air seasoning methods that can help to minimize seasoning time, seasoning defects, shrinkage characteristics and increase quality.
Źródło:
World News of Natural Sciences; 2020, 29, 3; 162-178
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antifungal efficiency of three traditional medicinal plants against Trichophyton rubrum
Autorzy:
Kindu, Geta
Mekonen, Mekonen
Ageze, Emebat
Abebaw, Maritu
Workie, Animut
Getnet, Bruktawit
Powiązania:
https://bibliotekanauki.pl/articles/1076672.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Croton macrostachyus
Dermatophytes
Eucalyptus globules
Phytolacca dodecandra
Trichophyton rubrum
Opis:
Cutaneous fungal infection are a wide-spread public health concern affecting millions of people all across the world. Nearly half of the affected will experience multiple episodes of infection requiring numerous rounds of treatment. Trichophyton rubrum was the most common etiological agent of dermatophytes, and it is emerging as an important and significantly prevalent infection in an increasingly aging population and immune-compromised patients. Development of more effective and less toxic anti-fungal agents is required for the treatment of dermatophytosis. The aim of the study was to evaluate the anti-fungal activity of extracts of three plant species used in traditional medicine against Trichophyton rubrum. The ethanol and water extracts of Eucalyptus globules, Croton macrostachyus, and Phytolacca dodecandra leaves were evaluated in vitro for anti-fungal activity against Trichophyton rubrum, using the agar well diffusion technique. The mean inhibition zone of both extracts for E. globulus, C. macrostachyus and P. dodecandra were 19.8, 20 and 16.3 mm, respectively, and mean inhibition zone of the ethanol and water extracts were 23 and 14.4 mm, respectively. Generally, mean inhibition zone of plant extracts did not show statistically significant difference among plants and the mean inhibition zone of plant extracts did show statistically significant difference between extracts (P ≤ 0.05). On the basis of the current findings, Eucalyptus globules and Croton macrostachyus could be good candidates in the search for new antifungal agents from natural products against Trichophyton rubrum. Therefore, further studies are needed to study their toxicology and isolate the bio- active components from these plants.
Źródło:
World News of Natural Sciences; 2019, 25; 15-21
2543-5426
Pojawia się w:
World News of Natural Sciences
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:
Extraction of eucalyptus oil as reduction of bacterial growth in drinking water
Autorzy:
Dubey, A.K.
Sahu, O.
Powiązania:
https://bibliotekanauki.pl/articles/11148.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
extraction
eucalyptus oil
reduction
bacterial growth
drinking water
composition
essential oil
growth rate
microbe
Opis:
Drinking water is acting as life line for living thing on the Earth, without that no life. Due to global industrialization availability of pure water is one of the major issues. The effluent are directly or indirectly discharge through the river stream, which affect the ground as well as sea water and climatically cycle water reach to us. In that condition medicine are required for quire purpose. In the world so many plants and herbs are available which are used as antimicrobial and sources of medicines. Today the large number of drugs in use is derived from plants. The important advantages for therapeutic uses of medicinal plants in various ailments are their safety besides being economical, effective and easy availability. In this regard’s herb plant Eucalyptus extracted oil is used as antibacterial agent to treat the drinking water.
Źródło:
International Letters of Natural Sciences; 2014, 11, 2
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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