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    Wyświetlanie 1-7 z 7
    Tytuł:
    Causes of cracks of chemical apparatus made of austenitic steel
    Przyczyny pęknięć aparatury chemicznej wykonanej ze stali austenitycznej
    Autorzy:
    Lange, A.
    Białucki, P.
    Małachowska, A.
    Bashir, A.
    Harapińska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/115129.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    stal austenityczna
    pęknięcie naprężeniowe
    para wodna
    austenitic steel
    stress crack
    steam
    Opis:
    The subject of the research was the installation of a water steam used in the chemical industry. Penetration tests revealed an extensive network of cracks on the surface of steel and welds. Metallographic studies, chemical composition analysis, EDX analysis were performed. Thermal treatment of steel was carried out and microhardness measurements were made. The results of the tests showed that stress corrosion was the main reason for the occurrence of cracks.
    Przedmiotem badań był inżektor - element instalacji pary przegrzanej eksploatowany w przemyśle chemicznym. Badania penetracyjne ujawniły rozległą siatkę pęknięć na powierzchni stali i spoin. Wykonano badania metalograficzne, analizę składu chemicznego, analizę EDX. Przeprowadzono obróbkę cieplną stali oraz wykonano pomiary mikrotwardości. Wyniki przeprowadzonych badań wykazały, że główną przyczyną wystąpienia pęknięć była korozja naprężeniowa.
    Źródło:
    Welding Technology Review; 2018, 90, 12; 25-31
    0033-2364
    2449-7959
    Pojawia się w:
    Welding Technology Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The evaluation of biodiversity in some indigenous Indian jujube (Zizyphus mauritiana) germplasm through physico-chemical analysis
    Autorzy:
    Anjum, M.A.
    Rauf, A.
    Bashir, M.A.
    Ahmad, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/11858870.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    Pakistan
    jujube tree
    Ziziphus mauritiana
    indigenous plant
    cultivated plant
    morphological trait
    biochemical trait
    physicochemical activity
    antioxidant activity
    germplasm
    biodiversity
    plant breeding
    breeding programme
    breeding research
    plant research
    Opis:
    Indian jujube (Zizyphus mauritiana Lamk.) is mostly cultivated in tropical and sub-tropical regions of the world. Many native and exotic jujube cultivars are grown for fruit production in Pakistan. However, little research work has been conducted on various aspects of jujube i.e. morphological and biochemical characterization of available germplasm. Therefore, fruits of thirteen genotypes were collected to study the biodiversity through physico-chemical analysis during the years 2015 and 2016. The aim of the present study was to investigate the relationship among various physico-chemical attributes of the jujube through Pearson’s correlation that may have greater importance for breeders during the selection of desirable genotype. The cultivar Foladi had the maximum fruit weight (30.49 g), pulp weight (28.42 g) and fruit diameter (36.75 mm) among all the cultivars. The maximum fruit length was recorded in Umran-13 (45.16 mm), while the maximum seed weight (2.70 g) was found in Dilbahar. Khobani had the maximum TSS (14.92 ºBrix). The highest level of acidity (0.74%) was recorded in Gorh. Akasha had highest vitamin C content (72.53 mg 100 mL–1 juice). The cultivars Sadqia, Umran-13, Mehmood wali, Yazman local and Gorh were much sweeter due to the maximum total sugars content (9.74–10.09%). The maximum antioxidant capacity was measured in Mahmood wali (616.13 mM Trolox 100 mL–1), Pak white (615.02 mM Trolox 100 mL–1) and Seedless (600.46 mM Trolox 100 mL–1), while antioxidant activity was significantly higher in Sadqia (40.604%). The maximum amount of total phenolic content was determined in Umran-13 and Sadqia (243.06 and 239.25 µg GAE mL–1 juice, respectively). The highly significant correlation (0.99) was observed between the fruit weight and pulp weight. Antioxidant activity and total phenolic content were also strongly correlated (0.70). Principal component analysis was made to determine the relationship among the genotypes and their variables. Dendrogram constructed on the basis of morphological attributes, divided 13 genotypes into four main clusters. Among the cultivars, Khobani and Mehmood wali share the maximum similarity (78%). Biochemical characteristics also divided the genotypes into three main clusters. The cultivars Pak white and Seedless had the maximum similarity (75%) among all the cultivars.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 4; 39-52
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of Russian olive witches’-broom disease and its insect vector in Northwestern Iran
    Autorzy:
    Hajizadeh, A.
    Khakvar, R.
    Bashir, N.S.
    Zirak, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/66149.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Russian olive
    Elaeagnus angustifolia
    tree
    pathogen
    phytoplasma
    witches' broom
    plant disease
    detection
    polymerase chain reaction
    insect vector
    Candidatus Phytoplasma asteris
    Macropsis infuscate
    Iran
    Opis:
    Recently, Russian olive trees showing witches’-broom and little leaf symptoms have been widely observed in northwestern and central Iran. Polymerase chain reaction (PCR) and nested PCR assays using phytoplasma universal primer pairs confirmed phytoplasma symptomatic infection of trees. Sequence analyses showed that ‘Candidatus Phytoplasma asteris’ was the causal agent of the disease in these regions. However, RFLP results using restriction enzymes HpaII, EcoRI, HinfI and AluI indicated that the collected isolates in these regions are genetically different. In addition, leafhopper Macropsis infuscata was recognized as a possible insect vector of the disease for the first time.
    Źródło:
    Journal of Plant Protection Research; 2017, 57, 3
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection and copy number estimation of the transgenic nucleotide sequences in an unknown GM event of Oryza sativa
    Detekcja i oszacowanie liczby kopii transgenu cry1Ac kodującego cechę odporności na szkodniki w genetycznie modyfikowanym ryżu (Oryza sativa)
    Autorzy:
    Sajjad, A.M.
    Bashir, T.
    Saeed, S.
    Ahmad, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/28252.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    The present study was designed to establish a qualitative detection method based on conventional and real time PCR assay to screen the commonly grown rice varieties for the presence of the cry1Ac gene. The detection of genetically modified rice in the screening process would necessitate accurate assay development and precise qualitative PCR tests complying with established procedures for the detection and characterization of transgenes in food grains. Such assay would not only enable the monitoring of transgene flow in local agricultural environment but also the characterization of different plant species produced with this transgene and its regulatory components. Thus, a reliable and quick screening assay was established for the qualitative detection of the transgene along with the promoter and selectable marker gene in genetically modified rice. By conventional PCR, a fragment of 215 bp was amplified with gene specific primers of cry1Ac. Primers for other transgenes such as gna and bar were also employed; however, no amplification was detected. The presence of the p35s, sps, and nptII genes was confirmed by qualitative real-time PCR. The specificity of the respective PCR products was checked through melt peak curve analysis. Sharp and precise melting temperatures indicated the presence of a single kind of PCR product in correspondence to each of the primers used. Moreover, the copy number of cry1Ac was estimated by ΔΔCT method. It is proposed that the primer sets and experimental conditions used in this study will be sufficient to meet the requirements for molecular detection and characterization of the cry1Ac transgene and affiliated sequences in sorting out conventional rice varieties from the ones which are genetically modified. It will also help to monitor the ecological flow of these transgenes and other biosafety factors.
    Celem niniejszych badań było opracowanie metody detekcji genu cry1Ac, odpowiedzialnego za odporność na szkodniki, z wykorzystaniem konwencjonalnej techniki PCR oraz PCR w czasie rzeczywistym, w celu badania obecności tego transgenu w powszechnie uprawianych odmianach ryżu. Detekcja modyfikacji genetycznej obecnej w odmianach ryżu wymaga opracowania metodyki badawczej z wykorzystaniem metody PCR, zgodnie z ustalonymi procedurami dotyczącymi obecności transgenów w zbożach konsumpcyjnych. Badania te nie tylko umożliwiłyby monitorowanie przepływu transgenów w lokalnym środowisku rolnym, ale również dokonanie charakterystyki różnych gatunków roślin wytworzonych z wykorzystaniem oznaczanego transgenu oraz związanych z nim fragmentów regulatorowych. W niniejszej pracy przedstawiono metodę wiarygodnego testu kontrolnego, w celu detekcji transgenu wraz z promotorem i selekcyjnym genem markerowym. Przy użyciu konwencjonalnej techniki PCR z zastosowaniem starterów specyficznych dla genu cry1Ac powielono fragment długości 215 pz. Poszukiwano także, lecz nie wykryto, innych transgenów, takich jak gna i bar. Obecność genów p35s, sps i nptII została potwierdzona na podstawie techniki ilościowego PCR w czasie rzeczywistym. Poszczególne produkty PCR poddano analizie z wykorzystaniem krzywych topnienia. Ostre wierzchołki krzywych topnienia wskazywały na obecność pojedynczego produktu PCR, odpowiednio dla każdego użytego startera. Za pomocą metody ΔΔCT oszacowano liczbę kopii genu cry1Ac. Na podstawie niniejszych badań wykazano, że zestawy starterów i opracowana metodyka są właściwe do molekularnej detekcji i charakterystyki transgenu cry1Ac oraz sekwencji z nim związanych i mogą służyć do wskazania genetycznie modyfikowanych odmian ryżu. Metoda ta może być również pomocna w monitorowaniu środowiska pod względem przepływu tego transgenu.
    Źródło:
    Acta Agrobotanica; 2016, 69, 4
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    FORMULATION AND IN VITRO EVALUATION OF FLOATING TABLETS OF PSYLLIUM HUSK & TRAGACANTH USING SITAGLIPTIN PHOSPHATE AS A MODEL DRUG
    Autorzy:
    Ghumman, Shazia A.
    Andleeb, Sahrish
    Bashir, Sajid
    Muhammad, Sarfraz R.
    Badshah, Munair
    Khattak, Majeedullah
    Powiązania:
    https://bibliotekanauki.pl/articles/895403.pdf
    Data publikacji:
    2018-06-30
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    sustained release
    Release kinetics
    Tragacanth
    floating tablets
    Sitagliptin phosphate
    psyllium husk
    Opis:
    Abstract A novel floating controlled release drug delivery system of Sitagliptin phosphate was formulated in an effort to increase the gastric retention time of the dosage form and thereby increased drug bioavailability. The tablets were prepared by wet granulation method using Psyllium Husk and tragacanth gum as a release retarding polymers and sodium bicarbonate as a gas generating agent. All the designed nine batches of floating tablets were evaluated for physical characteristics viz. weight variation, thickness, content uniformity, hardness, floating capacity, swelling studies. All formulations had floating lag time of less than 1 min and constantly floated for 12 h except F1, F4 and F7 (that dissolved completely in 8 h or less than 8 h). In vitro drug release studies were carried out for 8 h and release mechanism was further evaluated by linear regression analysis, F9 composed of 30% Psyllium Husk, 10% tragacanth gum and 18% sodium bicarbonate sustained the drug release for longer period. The formulations followed first order kinetics, Higuchi drug release kinetics with diffusion as the dominant mechanism of drug release and the release exponent ranged (0.452-0.635) indicating that the drug release from all formulations was by non-Fickian diffusion mechanism. The prepared floating tablets of STP (F9) might be a promising drug delivery system with sustained release action and improved bioavailability.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 3
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ethnobotanical investigation of significant seasonal medicinal weeds of Toba Tek Singh District, Punjab, Pakistan
    Autorzy:
    Tufail, M.
    Hussain, K.
    Nawaz, K.
    Iqbal, I.
    Arshad, N.
    Shahzadi, A.
    Javed, A.
    Nazeer, A.
    Bashir, Z.
    Qurban, M.
    Zeb, J.
    Ali, S.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049359.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    weeds
    ethnobotany
    flora
    survey
    chwasty
    etnobotanika
    badanie
    Opis:
    Introduction: Medicinal plants are found throughout the world but most are considered weeds. They are – directly or indirectly – the major source of medicines in pharmaceutical and herbal industries. Formulations used to prepare medicines or the method of use for these plants are mainly based on folk or traditional knowledge. This folk knowledge is not documented in many areas and needs to be explored. Objectives: This study was aimed to enlist the seasonal weed species with traditional medicinal usage in Toba Tek Singh District, Punjab, Pakistan. Methods: Field surveys were arranged in winter and summer 2019–2020 to enlist the important medicinal weeds and traditional knowledge of the local community. Data collected were as follows: local name of weed, medicinal use, method and part used. Results: Numerous wild perennial, biennial and annual plants were identified, 30 of them were ethnomedicinally important in the local community. They were grouped in 16 families. It was found that whole weed is used in many prescriptions (37%). Achyranthes aspera L. (Amaranthaceae) was the most common weed used in treating fevers, respiratory problems and asthma. Cichorium intybus L. (Asteraceae) was used in summer drinks to reduce thirst, improve digestion and liver function. Chenopodium album L. (Amaranthaceae) was used with 0.71 UV and 0.147 RFC values. Medicago polymorpha L. (Fabaceae) was used to treat kidney, intestinal and bladder infections. Its UV was 0.65 and RFC was 0.121. Tribulus terrestris L. (Zygophyllaceae) was used in impotency treatment, and in the removal of kidney stones and urinary tract infections treatment. It has 0.63 UV and 0.21 RFC values. This weed also showed the highest Fidelity Level (FL) (77%), as compared to other weeds. Conclusion: It was concluded that there are many significant medicinal weeds in the Toba Tek Singh District, Punjab, Pakistan that are used in traditional medicines in treating various disorders. These plants also showed herbal or pharmacological importance that can be used to develop medicine at commercial scale.
    Źródło:
    Herba Polonica; 2021, 67, 2; 29-38
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ethnobotanical knowledge and folk medicinal significance of the flora of district Gujrat, Punjab, Pakistan
    Autorzy:
    Ali, S.S.
    Hussain, K.
    Nawaz, K.
    Bhatti, K.H.
    Bashir, Z.
    Nazeer, A.
    Arif, U.
    Jafar, S.
    Siddiqi, E.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049056.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    District Gujrat
    medicine
    ethnomedicinal flora
    survey
    native people
    prowincja Gujrat
    lek
    rośliny lecznicze używane w medycynie ludowej
    rdzenni mieszkańcy
    badanie ankietowe
    Opis:
    Introduction: Medicinal plants are the natural source of medicines used in treatment of many diseases among local communities of various countries. It is also the raw material for the pharmaceutical industry. Pakistan is a country with a variety of medicinal plants, comprehensively studied in some areas, while others still need more studies of their flora. Objectives: The study was performed to catalogue the flora of district Gujrat, Punjab, Pakistan and to assess its ethnomedicinal importance. Methods: A field survey was conducted in the Gujrat district (including Sarai Alamgir, Gujrat and Kharian) in 2019–2020 to collect the flora. Nearly 200 people of various age groups were interviewed and the questionnaire was filled, the gender and professions of the participants were also noted. Results: The plant species collected belonged to 32 different Angiosperm families i.e. Poaceae, Brassicaceae, Fabaceae, Asteraceae, Moraceae, Amaranthaceae, Apiaceae, Myrtaceae, Rutaceae, Solanaceae, Malvaceae, Euphorbiaceae and Lamiaceae. The obtained material consisted of 30 herbs, 20 shrubs and 22 trees. The floral parts used most often were leaves (63%) followed by: flower (41%), fruit (28%), stem (16%), seed (16%), bark (14%), root (13%), whole plant (12%), underground part (3%) and latex (3%). According to the study, the highest RFC (Relative Frequency of Citation) values were 0.1 in Cassia fistula L. (0.25) and the smallest RFC values were observed in Stellaria media (L.) Vill. – 0.025. The highest UV (Use Values) were noted for Achyranthes aspera L. at 0.9. In disease category, the highest value (0.67) of ICF (Informant Consensus Factor) was observed for stomach and skin infections, while the lowest ICF value was noted for diabetes and gonorrhoea (0.27). Conclusions: It was concluded that the Gujrat district is rich in useful plants that can be used in the preparation of various medicines as well as be sold on the herbal market.
    Źródło:
    Herba Polonica; 2020, 66, 1; 37-51
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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