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    Wyświetlanie 1-8 z 8
    Tytuł:
    A study of second order differential inclusions with four-point integral boundary conditions
    Autorzy:
    Ahmad, Bashir
    Ntouyas, Sotiris
    Powiązania:
    https://bibliotekanauki.pl/articles/729334.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    differential inclusions
    four-point integral boundary conditions
    existence
    nonlinear alternative of Leray Schauder type
    fixed point theorems
    Opis:
    In this paper, we discuss the existence of solutions for a four-point integral boundary value problem of second order differential inclusions involving convex and non-convex multivalued maps. The existence results are obtained by applying the nonlinear alternative of Leray Schauder type and some suitable theorems of fixed point theory.
    Źródło:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2011, 31, 2; 137-156
    1509-9407
    Pojawia się w:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonlinear fractional differential inclusions with anti-periodic type integral boundary conditions
    Autorzy:
    Ahmad, Bashir
    Ntouyas, Sotiris
    Powiązania:
    https://bibliotekanauki.pl/articles/729350.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    fractional differential inclusions
    anti-periodic
    integral boundary conditions
    existence
    fixed point theorems
    Opis:
    This article studies a boundary value problem of nonlinear fractional differential inclusions with anti-periodic type integral boundary conditions. Some existence results are obtained via fixed point theorems. The cases of convex-valued and nonconvex-valued right hand sides are considered. Several new results appear as a special case of the results of this paper.
    Źródło:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2012, 32, 1; 45-62
    1509-9407
    Pojawia się w:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An existence theorem for fractional hybrid differential inclusions of Hadamard type
    Autorzy:
    Ahmad, Bashir
    Ntouyas, Sotiris
    Powiązania:
    https://bibliotekanauki.pl/articles/729503.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    Hadamard fractional derivative
    hybrid differential inclusions
    Diriclet boundary conditions
    existence
    fixed point
    Opis:
    This paper studies the existence of solutions for fractional hybrid differential inclusions of Hadamard type by using a fixed point theorem due to Dhage. The main result is illustrated with the aid of an example.
    Źródło:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2014, 34, 2; 207-218
    1509-9407
    Pojawia się w:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sustained Release of Drug Facilitated Through Chemically Crosslinked Polyvinyl Alcohol-Gelatin (PVA-GE) Hydrogels. A sustainable biomedical approach
    Autorzy:
    Ali, Shaukat
    Ranjha, Nazar Muhammad
    Ahmad, Bashir
    Khan, Ayaz Ali
    Hassan, Fakhr Ul
    Aziz, Tariq
    Alharb, Metab
    Alshammari, Abdulrahman
    Alasmari, Abdullah F.
    Alharbi, Mousa Esa
    Powiązania:
    https://bibliotekanauki.pl/articles/27315648.pdf
    Data publikacji:
    2023
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    hydrogel
    gelatin
    drug release
    ciprofloxacin HCl
    polyvinyl alcohol
    Opis:
    The present study aimed to prepare hydrogel based on polyvinyl alcohol (PVA) and gelatin (Ge) and characterization of PVA/Ge hydrogel for their potential use as a sustained drug delivery system. Polyvinyl Alcohol (PVA) and-Gelatin (Ge) were cross-linked using glutaraldehyde (GA) as a crosslinking agent and hydrochloric acid (HCl) as a catalyst. Different feed polymer ratio and crosslinking agent concentration were used to prepare a series of PVA/Ge hydrogels. The obtained PVA/Ge hydrogels were investigated for dynamic and equilibrium swelling studies. The effect of polymers ratio, degree of crosslinking and pH of the medium on swelling of PVA/Ge hydrogels was investigated. Furthermore, the values of diffusion coeficient (D), volume fraction, polymer-solvent interaction parameter, molecular weight between crosslink and crosslink density were calculated. For swelling studies, 0.05M USP phosphate buffer solutions of different pH (1.2, 5.5, 6.5 and 7.5) were used. For the drug release study, ciprofloxacin HCl was loaded into selected samples as a model drug. The release of drug from these samples was performed for 12 hours in USP phosphate buffers of pH 1.2, 5.5 and 7.5. The release data from these samples were fitted into various kinetic models like zero order, first order, Higuchi and Peppas models to investigate the release mechanism. It was found that by varying the composition of PVA/Ge hydrogel and GA concentration, a significant difference was observed in drug release kinetics. FTIR spectroscopy and X-ray diffraction were used for the characterization of hydrogels. PVA/Ge hydrogel showed sustained release of the model drug at various pH values suggesting its potential use as a sustained drug delivery system.
    Źródło:
    Polish Journal of Chemical Technology; 2023, 25, 2; 56--65
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    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:
    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:
    Atomic Ordering Behavior of CoTi Alloy with Addition of Transition Metals
    Autorzy:
    Hussain, Abid
    Ziya, Amer Bashir
    Atiq, Shabbar
    Saleem, Muhammad
    Ullah, Mahtab
    Ahmad, Sajjad
    Ahmad, Naseeb
    Powiązania:
    https://bibliotekanauki.pl/articles/2049690.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    transformation temperature
    order parameter
    ternary alloys
    ordering energy
    Opis:
    The statistical-thermodynamic theory of ordering and electronic theory of ordering in the pseudo-potential approximation was used to study the influence of ternary addition of some transition metals on the atomic ordering behavior of Co0.5(Ti1-xMx)0.5 alloys with M = Fe, Pt, re, V, Cr, Mn, Ni, Cu, Zn, Zr, Ag, Hf or Au up to a concentration of 1 at.%. The partial ordering energies, order-disorder phase transformation temperatures and partial short range order parameters have been calculated for these alloys. The analysis shows that the impurity elements in Co0.5(Ti1-xMx)0.5 alloys can be divided into two main groups on the basis of lattice site occupancy i.e. M = V, Cr, Mn, Cu, Zn, Zr, Ag, Hf and Au mainly substitute for Co sublattice sites whereas M = Fe, Ni, Pt or re mainly substitute for Ti sublattice sites. Further, the order-disorder transformation temperatures were found to either increase or remain nearly unchanged by the addition of ternary impurities in the CoTi alloy depending on the absolute value of the partial ordering energies. Alloys of Ti with V, Cr, mn, Cu, Zn, Zr, Ag, Hf or Au in place of Co and alloys of Co with Fe, Ni, Pt or Re in place of Ti can be predicted for future. The results of the present analysis are in good agreement with the available experimental data on these alloys.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 2; 425-430
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Clinico-radiological Results of Distal Chevron Osteotomy without Lateral Soft Tissue Release in Mild to Moderate Hallux Valgus Deformity
    Autorzy:
    Wani, Mohd Rafeeq
    Wani, Mohd Iqbal
    Bashir, Arshid
    Halwai, Manzoor Ahmad
    Sonum, Stanzin
    Rashid, Yasir
    Powiązania:
    https://bibliotekanauki.pl/articles/28409356.pdf
    Data publikacji:
    2021-08-21
    Wydawca:
    Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
    Tematy:
    hallux valgus
    distal chevron osteotomy
    lateral soft tissue release
    AOFAS score
    Opis:
    Background. The study was done to evaluate short term clinico-radiological results of distal chevron osteotomy without lateral soft tissue release in mild to moderate hallux valgus. Materials and methods. This was a prospective study consisting of a total of 35 cases with mild to moderate hallux valgus deformity. All these patients were treated by distal chevron osteotomy without lateral soft tissue release. Results. In our study, the average value of hallux angle preoperatively was 32° (range, 24°-40°) and at final follow-up it was 14° (range, 8°-31°). The average reduction was 18°. The average intermetatarsal angle showed mean reduction of 5.3° at the final follow-up. Average range of motion of the first metatarsophalyngeal joint preoperatively and at final follow-up showed a small reduction of 5 degrees. The average preoperative AOFAS score was 49, which improved by 35 points to 84 at the final follow-up. 11.42% of the patients in the study group had a recurrence. Conclusions. 1. Based on our experience with distal chevron osteotomy without lateral soft tissue release, we found the procedure easy to perform with good procedural outcomes. 2. The possible complications of lateral soft tissue release are avoided.
    Źródło:
    Ortopedia Traumatologia Rehabilitacja; 2021, 23(4); 287-293
    1509-3492
    2084-4336
    Pojawia się w:
    Ortopedia Traumatologia Rehabilitacja
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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