نتایج جستجو برای: Solution stability
تعداد نتایج: 742683 فیلتر نتایج به سال:
1- in a search directed to the reaction of compound)23(the cycloaddition reaction of 1,3- diphenylisobenzofurane)14(with p-benzoquinone)19(,followed by addition of cyclopentadiene was carried out.the specific spacial stracture of its ir,nmr,mass spectra. 2- in another attempt the kinetic stability and behavior of compounds)20(and)23(was studied.the main subject of this study was the highly reve...
atropine (at) and oximes, alone or in combination, have been proven greatly valuable therapeutics in the treatment of organophosphates intoxications. an injectable mixture of at and obidoxime (ob) was formulated for administration by automatic self-injector. the aqueous single dose solution contained 275 mg obidoxime chloride and 2.5 mg atropine sulfate per 1 ml (220 mg and 2 mg per 0.8 effecti...
as we know sol-gel is one of the most important techniques for thin film preparation. in this paper, high transmission silica thin films have been prepared by dip-coating process from a new silicon-alkoxide solution. the prepared sol was stable for 45 days which is very important to characterize the coating process. the optical properties as a function of aging time, withdrawal rate, and heat t...
fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...
Abstract Introduction: Allicin is extracted from Garlic, and can attach to the tiol groups of proteins by tiosulfanate group. This attachment leads to damage of various proteins and enzymes of microbes, and can affect wide spectrum of viruses, bacteria, fungi, and parasites. The aim of this study was to investigate the stability, toxicity and antimicrobial effect of allicin solution. ...
We provide necessary and sucient conditions for psi-conditional as-ymptotic stability of the solution of a linear matrix Lyapunov system and sucientconditions for psi -conditional asymptotic stability of the solution of a rst ordernon-linear matrix Lyapunov system X0 = A(t)X + XB(t) + F(t;X).
in this paper, first we discuss a local stability analysis of model was introduced by p. j. mumby et. al. (2007), with $frac{gm^{2}}{m+t}$ as the functional response term. we conclude that the grazing intensity is the important parameter to control the existence or extinction of the coral reef. next, we consider this model under the influence of the time delay as the bifurcat...
This paper studies a borrower’s optimal decision, when he has the choice to make early payment, to close a fixed rate mortgage. Mathematically we use several integral identities to design an effective Newton algorithm to solve for the optimal prepayment curve iteratively. Numerical evidence shows that the algorithm is fast and stable.
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