141 articles for “q-Derivative”

Research ArticleOpen accessEvery word in the titleNovel Production of Two New Nonpolyenic Antifungal Macrolide Derivatives by Streptomyces Z26 Isolated from Moroccan Rhizospheric SoilAhmed Nafis, Brahim Oubaha, Najoua Elhidar et al.The aim of our study was to screen Moroccan actinomycete isolates able to produce nonpolyenic antifungal metabolites in order to contribute to limiting the problem of fungal infections emergence in particular mycotic diseases and to discover known antifungal families, especially nonpolyenic drugs. 480 isolates were tested against 5clinically pathogenic Candida species. Several methods have been used to study the polyenic … …OnLine Journal of Biological Sciences, Vol. 18, Issue 2 · 8 Mar 2018 · 8,459 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleMicrowave Assisted Regioselective Synthesis and Biological Evaluation of Pyrano[2,3-c]Pyridine Derivatives Utilizing DMAP as a CatalystAsmaa M. FahimRegioselective facile production of pyrano[2,3-c]pyridine through multicomponent reaction of aromatic aldehydes, ethyl cyano acetate or malononitrile and C-H activated compound of 3-hydroxy picolinic acid in the occurrence of smaller amount of DMAP catalyst utilizing microwave apparatus, which is green and simple environmentally with high yield, recyclability catalyst. Totally the products were partitioned for antimicrobiogical action; it was detected that were … …OnLine Journal of Biological Sciences, Vol. 17, Issue 4 · 14 Dec 2017 · 8,019 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleAnticancer Activity of Some New Synthesized Tetrahydroquinoline and Tetrahydrochromene Carbonitrile DerivativesUsama W. Hawas, Mohamed A. Al-Omar, Abd El-Galil E. Amr, Abu El-Ftouh G. HammamProblem statement: In continuation to our search for new heterocyclic chemistry based anticancer, the suggestion, synthesis, structure elucidation of some naphthalene, chromene and quinoline derivatives 3-7 were realized herein using 3-methylcyclohexanone 1 as a starting material. Approach: The antitumor activities of the newly synthesized compounds 4-7 were evaluated utilizing 60 different human tumor cell lines, representing leukemia, melanoma, lung, colon, … …American Journal of Applied Sciences, Vol. 8, Issue 10 · 14 Sep 2011 · 7,484 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleA Hybrid of Fuzzy and Proportional-Integral-Derivative Controller for Electro-Hydraulic Position Servo SystemPornjit Pratumsuwan, Siripun Thongchai, Surapun TansriwongProblem statement: While classical PID controllers are sensitive to variations in the system parameters, Fuzzy controllers do not need precise information about the system variables in order to be effective. However, PID controllers are better able to control and minimize the steady state error of the system. To enhance the controller performance, hybridization of these two controller structures comes to … …Energy Research Journal, Vol. 1, Issue 2 · 31 Oct 2010 · 10,516 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleDetermination of Optimum Values of Descriptors to Set Filters for Synthetic Tri-Pyrrole Derivatives (Prodiginines) Against Multi Drug Resistant Strain of Plasmodium FalciparumVijay H. Masand, Devidas T. Mahajan, Eslam Pourbasheer et al.In the present study, we have carried out extensive non-linear Quantitative-Structure Activity Relationship (QSAR) analysis to correlate in vitro anti-malarial activity against multi drug resistant strain of Plasmodium falciparum. Forty-three synthetic prodiginines with different structural features were used for their potential antimalarial activity. Linear, bilinear, biexponential and parabolic equations were developed. These equations were compared to determine the optimum values … …Current Research in Drug Discovery, Vol. 1, Issue 2 · 26 Jan 2015 · 14,141 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleANTICONVULSANT AND NEUROTOXICITY EVALUATION OF SOME NEWLY SYNTHESIZED THIAZOLYL COUMARIN DERIVATIVESM. Faiz Arshad, Nadeem Siddiqui, Ahmed Elkerdasy et al.The present series of compounds were synthesized with the aim to develop newer anticonvulsant agents that are comparatively more efficacious and safer than the currently used anticonvulsant agents. Various thiazolyl coumarins were synthesized by the reaction of 3-(bromoacetyl)-2H-chromen-2-one with different substituted aryl thiourea. The structures of the synthesized compounds were confirmed by spectral data and elemental analyses. Compounds were tested … …American Journal of Pharmacology and Toxicology, Vol. 9, Issue 2 · 26 Mar 2014 · 7,676 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleKinetic Study of the Effect of Benzoic Acid Derivatives on Copper ElectrodepositionHowaida M. El-KashlanThe effect of anodic oxygen bubbles on the rate of mass transfer in presence of benzoic acid, p-nitro, p-chloro and p-aminobenzoic acids were studied by measuring the limiting current of cathodic deposition of copper from acidified copper sulphate solution using lead anode. It is found that the rate of deposition decreases by adding organic substances. The rate of deposition depends … …American Journal of Applied Sciences, Vol. 5, Issue 3 · 31 Mar 2008 · 7,129 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsq-Bernoulli’s EquationSalih Y. Arbab, Sami H. AltoumThe work shows the q-deformation of Bernoulli’s equation, q-derivative and q-calculus are used to form a q-analogous of Bernoulli’s equation. We introduce the theorem of q-Bernoulli’s equation. …American Journal of Applied Sciences, Vol. 17, Issue 1 · 4 Oct 2020 · 7,127 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsThe q-Riccati AlgebraAmna Hasan, Hakeem A. Othman, Sami H. AltoumFor q∈(0, 1), we introduce the q-Riccati Lie algebra. Using the q-derivative (or Jackson derivative), we give a representation of this Lie algebra. …Journal of Mathematics and Statistics, Vol. 16, Issue 1 · 14 Jan 2020 · 6,980 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsq-Euler Lagrange EquationAmna Hasan, Hakeem A. Othman, Sami H. AltoumIn this work, for q ∈ (0, 1), the q-deformation of Euler- Lagrange equation is studied; we use q-derivative (or Jackson derivative) to deduce a new formula of Euler- Lagrange equation. Some examples are presented. …American Journal of Applied Sciences, Vol. 16, Issue 9 · 22 Nov 2019 · 7,757 accessesView PDF Cite