97 results match your criteria: "Omar Al Mukhtar University[Affiliation]"
J Immunol Methods
May 2021
School of Life Sciences, The University of Nottingham, Nottingham NG7 2UH, UK. Electronic address:
Skin prick testing (SPT) and measurement of serum allergen-specific IgE (sIgE) are used to investigate asthma and other allergic conditions. Measurement of serum total IgE (tIgE) and allergen-specific IgG4 (sIgG4) may also be useful. The aim was to ascertain the correlation between these serological parameters and SPT.
View Article and Find Full Text PDFJ Histochem Cytochem
September 2020
Department of Otorhinolaryngology-Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
Oropharyngeal squamous cell carcinoma (OPSCC) is subclassified by the World Health Organization into two different entities: human papillomavirus (HPV)-positive and HPV-negative tumors. HPV infection promotes the epithelial-to-mesenchymal transition (EMT) and transformation of keratinocyte stem cells into cancer stem cells. EMT is a crucial process in the carcinogenesis of epithelial-derived malignancies, and we aimed to study the role of its markers in OPSCC.
View Article and Find Full Text PDFJ Anim Sci
July 2020
Department of Animal Sciences, Colorado State University, Fort Collins, CO.
Data on calving ease (CE) and birth, weaning weight (WW), and yearling weight (YW) were obtained from the American Simmental Association (ASA) and included pedigree and performance information on 11,640,735 animals. Our objective was to quantify differential response from selection for high CE vs. low birth weight (LBW) in first-calf Simmental heifers.
View Article and Find Full Text PDFJ Appl Microbiol
October 2020
Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, Selangor, Malaysia.
Aims: Agro-based wastes were evaluated as a medium for mass micropropagule production and optimal efficacy of Trichoderma asperellum B1092 in controlling Fusarium oxysporum f. sp. lycopersici and promoting tomato growth.
View Article and Find Full Text PDFSci Rep
April 2020
Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Chapman University, Irvine, CA, USA.
Gout is a chronic arthritis caused by the deposition of poorly soluble monosodium urate monohydrate (MSU) crystals in peripheral joints. Resident macrophages initiate inflammation in response to MSU mediated by NF-κB nuclear translocation and NLRP3 inflammasome activation. We investigated the role of CD44, a transmembrane receptor, in mediating MSU phagocytosis by macrophages.
View Article and Find Full Text PDFSci Total Environ
May 2020
Electrical and Electronics Engineering Department, Omar Al-Mukhtar University, Al Baida, Libya.
The increased demand for solar renewable energy sources has created recent interest in the economic and technical issues related to the integration of Photovoltaic (PV) into the grid. Solar photovoltaic power generation forecasting is a crucial aspect of ensuring optimum grid control and power solar plant design. Accurate forecasting provides significant information to grid operators and power system designers in generating an optimal solar photovoltaic plant and to manage the power of demand and supply.
View Article and Find Full Text PDFFish Physiol Biochem
February 2020
Faculty of Forestry, Department of Forest Engineering, Kastamonu University, Kastamonu, Turkey.
This study was conducted to determine the effects of dietary supplementation of lemon balm (Melissa officinalis) aqueous methanolic extract on growth performance, blood parameters, digestive and antioxidant enzyme activities, and non-specific immune responses in rainbow trout (Oncorhynchus mykiss). Fish with an average weight of 23.03 ± 0.
View Article and Find Full Text PDFSurfactants are well known as permeation enhancers. Span 60 microparticles encapsulating different concentrations of metformin HCl were prepared by using rapid congeal melting technique. Electro-scanning microscope showed smooth surface but less round microparticles.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
September 2019
Department of Zoology, Faculty of Science, Omar Al Mukhtar University, Al Bayda, Libya.
Oxidative stress and neuroinflammatory changes appear to be the early events involved in AD's development and progression. The present study was designed to assess the effect of soybean isoflavone extract (SIFE) against colchicine-induced cognitive dysfunction and oxidative stress in male rats.Fifty adult male Wistar albino rats were divided into five groups: control, ACSF-treated group, soybean isoflavones (SIF)-treated group, colchicine (COL)-treated group, and SIF + COL-treated group.
View Article and Find Full Text PDFTumour Biol
March 2019
3 Translational Cancer Medicine Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
Human papillomavirus is detected in over 50% of oropharyngeal squamous cell carcinomas. Human papillomavirus-positive oropharyngeal squamous cell carcinomas differ from human papillomavirus-negative tumors, and both expression patterns are classified as distinct entities. The Bmi-1 oncogene is a well-known member of the mammalian polycomb-group family.
View Article and Find Full Text PDFForensic Sci Res
April 2018
Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, Auburn, AL, USA.
A series of N,N-disubstituted piperazines were synthesized containing the structural elements of both methylenedioxybenzylpiperazine (MDBP) and trifluoromethylphenylpiperazine (TFMPP) in a single molecule. These six potential designer drug molecules having a regioisomeric relationship were compared in gas chromatography-mass spectrometry (GC-MS), gas chromatography-infrared spectroscopy and serotonin receptor affinity studies. These compounds were separated by capillary gas chromatography on an Rxi®-17Sil MS stationary phase film and the elution order appears to be determined by the position of aromatic ring substitution.
View Article and Find Full Text PDFAppl Spectrosc
April 2019
1 Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, Auburn, AL, USA.
The analytical differentiation of the indole ring regioisomeric chloro-1- n-pentyl-3-(1-naphthoyl)-indoles is described in this report. The regioisomeric chloroindole precursor compounds, N- n-pentyl chloroindole synthetic intermediates, and the target chloro-substituted naphthoylindoles showed the equivalent gas chromatographic elution order based on the position of chlorine substitution on the indole ring. The regioisomeric chloro-1- n-pentyl-3-(1-naphthoyl)-indoles yield electron ionization mass spectra having equivalent major fragments resulting from cleavage of the groups attached to the central indole nucleus.
View Article and Find Full Text PDFBeilstein J Org Chem
August 2018
WestCHEM, School of Chemistry, Joseph Black Building, University of Glasgow, University Place, Glasgow, G12 8QQ, UK.
A novel methodology towards fabrication of multilayer organic devices, employing electrochemical polymer growth to form PEDOT and PEDTT layers, is successfully demonstrated. Moreover, careful control of the electrochemical conditions allows the degree of doping to be effectively altered for one of the polymer layers. Raman spectroscopy confirmed the formation and doped states of the PEDOT/PEDTT bilayer.
View Article and Find Full Text PDFFront Oncol
July 2018
Department of Biomedical and Pharmaceutical Sciences, Center for Targeted Drug Delivery, School of Pharmacy, Chapman University, Irvine, CA, United States.
Janus tyrosine kinase (JAK) family of proteins have been identified as crucial proteins in signal transduction initiated by a wide range of membrane receptors. Among the proteins in this family JAK2 has been associated with important downstream proteins, including signal transducers and activators of transcription (STATs), which in turn regulate the expression of a variety of proteins involved in induction or prevention of apoptosis. Therefore, the JAK/STAT signaling axis plays a major role in the proliferation and survival of different cancer cells, and may even be involved in resistance mechanisms against molecularly targeted drugs.
View Article and Find Full Text PDFSensors (Basel)
June 2018
Electrical and Electronics Department, Faculty of Engineering, Omar Al-Mukhtar University, Al Bayda P.O. Box 991, Libya.
Eddy current testing (ECT) is an accurate, widely used and well-understood inspection technique, particularly in the aircraft and nuclear industries. The coating thickness or lift-off will influence the measurement of defect depth on pipes or plates. It will be an uncertain decision condition whether the defects on a workpiece are cracks or scratches.
View Article and Find Full Text PDFJ Chromatogr Sci
October 2018
Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, Auburn, AL, USA.
The indole ring regioisomeric methoxy-1-n-pentyl-3-(1-naphthoyl)-indoles represent indole ring-substituted analogs of the synthetic cannabinoid JWH-018. The electron ionization mass spectra show equivalent regioisomeric major fragments resulting from cleavage of the groups attached to the central indole nucleus. The characteristic (M-17)+ fragment ion at m/z 354 resulting from the loss of OH group is significant in the mass spectra of all four compounds.
View Article and Find Full Text PDFEur J Pharm Sci
July 2018
Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University, Egypt.
In the course of application and modernization of buccal dosage forms, lyophilized sponges for transmucosal drug delivery symbolize one of the most attractive approaches. Chitosan (CS) has been extensively investigated as a forming material of different buccal dosage forms including sponges. However, CS-based buccal delivery systems suffer from many limitations like weak adhesion strength and poor tensile properties.
View Article and Find Full Text PDFEur Arch Otorhinolaryngol
May 2018
Department of Pathology, University of Helsinki, HusLab and Helsinki University Hospital, Haartmaninkatu 3, P.O. Box 21, 00014, Helsinki, Finland.
Objectives: Hormone receptors play an important role in many types of cancers. Alongside factors associated with human papillomavirus (HPV) infection, hormonal receptors may impact the tumorigenesis of oropharyngeal cancer.
Materials And Methods: This study consists of 199 consecutive oropharyngeal squamous cell carcinoma (OPSCC) patients diagnosed and treated with a curative intent.
Carbohydr Polym
May 2018
Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University, Egypt.
In the current study, laminated chitosan (CS):hydroxypropyl methylcellulose (HPMC) composite sponges were exploited as solid matrices for buccal delivery of tripterine phytosomes functionalized with novel mucopenetrating protamine layer (PRT-TRI-PHY). Tripterine (TRI) is a herbal drug widely investigated as a potential anticancer candidate against various types of cancers. However, clinical use of TRI is handicapped by its low oral bioavailability.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
May 2018
Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, Auburn, AL 36849, USA. Electronic address:
The twelve 1-n-pentyl-2-, 3-, 4-, 5-, 6- and 7-(1- and 2-naphthoyl)-indoles each have the same substituents attached to the indole ring, identical elemental composition (CHNO) yielding identical nominal and accurate masses. These twelve isomers cover all possible positions of carbonyl bridge substitution for both indole (positons 2-7) and naphthalene rings (positions 1 and 2). Regioisomeric compounds can represent significant challenges for mass based analytical methods however, infrared spectroscopy is a powerful tool for the identification of positional isomers in organic compounds.
View Article and Find Full Text PDFJ Chromatogr B Analyt Technol Biomed Life Sci
March 2018
Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, Auburn, AL 36849, USA. Electronic address:
Int J Pharm
January 2018
Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University, Egypt.
Celastrol (CST) is a promising natural drug of herbal origin that gained a great interest in the recent years by virtue of its wide variety of pharmacological actions. Nowadays, CST is extensively studied as a natural anticancer surrogate with a potential activity against various types of cancers. However, CST suffers from many limitations that handicapped its clinical utility such as limited aqueous solubility and poor gastrointestinal absorption which resulted into its low oral bioavailability.
View Article and Find Full Text PDFTalanta
August 2017
Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, Auburn, AL 36849, USA. Electronic address:
Multiple and complementary analytical methods are often necessary for the identification of a specific compound from a series of closely related structural isomers. Gas chromatography-mass spectrometry (GC-MS), gas chromatography-product ion mass spectrometry (GC-MS/MS) and gas chromatography-infrared spectroscopy (GC-IR) were used to differentiate between the six dimethoxypyrrovalerone (DMPV) regioisomers. The six regioisomeric aminoketones were separated on a 50% phenyl stationary phase and the elution order is related to the positioning of substituents on the aromatic ring.
View Article and Find Full Text PDFJ Chromatogr B Analyt Technol Biomed Life Sci
March 2017
Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, Auburn, AL 36849, USA. Electronic address:
The desoxy phenethylamine analogues in this study represent a combination of alkyl side-chain and cyclic amines (azetidine, pyrrolidine, piperidine and azepane) to yield a set of molecules of identical elemental composition as well as major mass spectral fragment ions (base peaks) of identical elemental composition. These desoxy phenethylamine analogues of the aminoketone designer drug, 3,4-methylenedioxy-pyrrovalerone (MDPV) related to the natural product cathinone were prepared from piperonal (3,4-methylenedioxybenzaldehyde) via the intermediate precursor ketones. The aminoketones and the desoxy phenethylamine regioisomers were each separated in capillary gas chromatography experiments using an Rxi-17Sil MS stationary phase with the aminoketones showing greater retention than the corresponding desoxyamines.
View Article and Find Full Text PDFEndocrine
November 2016
Department of Zoology, Faculty of Science, Omar Al Mukhtar University, Bayda, Libya.
The aim of this article is to solve an existing controversy over the involvement of uncoupling protein-2 in the impairment of glucose-stimulated insulin secretion induced by chronic exposure of β-cells to palmitate. We analyzed and compared the results of studies that support and that deny the involvement of uncoupling protein-2 in this impairment. We observed that this impairment could occur in multiple stages.
View Article and Find Full Text PDF