نتایج جستجو برای: qsar

تعداد نتایج: 3811  

2012
Love Kumar Soni

A set of 26 compound of the series halogenated Indole-3-Acetic acids as oxidatively activate prodrugs with potential for targeted cancer therapy were subjected to quantitative structure activity relationship (QSAR) analysis using combination of various electronic, thermodynamic and spatial descriptors. Several statistical regression equations were obtained using multiple regression analysis. QS...

Journal: :Journal of chemical information and computer sciences 1998
Arthur F. Duprat T. Huynh Gérard Dreyfus

The prediction of properties of molecules from their structure (QSAR) is basically a nonlinear regression problem. Neural networks are proven to be parsimonious universal approximators of nonlinear functions; therefore, they are excellent candidates for performing the nonlinear regression tasks involved in QSAR. However, their full potential can be exploited only in the framework of a rigorous ...

Journal: :Water research 2005
Gousheng Liu Jianguo Yu

Based on descriptors of n-octanol/water partition coefficients (logKow), molecular connectivity indices, and quantum chemical parameters, several QSAR models were built to estimate the soil sorption coefficients (logKoc) of substituted anilines and phenols. Results showed that descriptor logKow plus molecular quantum chemical parameters gave poor regression models. Further study was performed t...

2014
Mohammed E. El-Telbany

QSAR (quantitative structure-activity relationship) modeling is one of the well developed areas in drug development through computational chemistry. Similar molecules with just a slight variation in their structure can have quit different biological activity. This kind of relationship between molecular structure and change in biological activity is center of focus for QSAR Modeling. Predictions...

ژورنال: :مجله طب نظامی 0
مریم ایمان maryam iman chemical injuries research center, baqiyatallah university of medical sciences, tehran, iranمرکز تحقیقات آسیب های شیمیایی، دانشگاه علوم پزشکی بقیه الله، تهران، ایران بهاره اثنی عشری bahare asna ashari department of medicinal chemistry, faculty of pharmacy, pharmaceutical sciences branch, islamic azad university, tehran, iranدپارتمان شیمی دارویی، واحد علوم دارویی، دانشگاه آزاد اسلامی، تهران، ایرانسازمان اصلی تایید شده: دانشگاه علوم پزشکی بقیه الله (baqiyatallah university of medical sciences) اصغر داود asghar davood department of medicinal chemistry, faculty of pharmacy, pharmaceutical sciences branch, islamic azad university, tehran, iranدپارتمان شیمی دارویی، واحد علوم دارویی، دانشگاه آزاد اسلامی، تهران، ایرانسازمان اصلی تایید شده: دانشگاه آزاد اسلامی علوم دارویی (islamic azad university pharmaceutical sciences branch)

اهداف: در این مطالعه، بر روی یک دسته از مشتقات تری آزول با اثر مهارکنندگی آنزیم cyp51 مطالعات داکینگ و به دنبال آن آنالیز رابطه فعالیت و ساختار کمی (qsar) انجام گرفت. روش ها: با استفاده از برنامه ی hyperchem ساختار مولکولی آزول های طراحی شده ساخته شد. برای انجام مطالعات داکینگ از برنامه autodock استفاده شد. در مطالعات qsar، توصیف گرهای مختلفی محاسبه گردیدند. یافته ها: بر اساس نتایج به دست آمده ...

2015
Noha A. Saleh Hanan Elhaes Osama Osman Abdel Aziz Mahmoud Medhat Ibrahim

Fullerene (C60) is enhanced with pyrrolidine group to produce fulleropyrrolidine which is considered as one of the most important derivatives of fullerene. Fulleropyrrolidine is further modified in order to enhance its solubility which in turn could enhance its biological applications. Accordingly this work is dedicated to modify fulleropyrrolidine carbodithioic acid as NO2 group introduced at ...

2014
MAYURA KALE GAJANAN SONWANE RAJESH NAWALE

In the present work, we have applied group quantitative structure–activity relationships (G-QSAR) for exploring the relationship between the structures of a new emerging family of 2-{[2-(1Himidazol-1-yl)ethyl]sulfanyl}-1H-benzimidazole derivatives and their antiprotozoal activities. We have developed descriptive models, in order to aid in further optimization and development of newer antiprotoz...

Journal: :Machine learning and knowledge extraction 2022

Machine learning represents a milestone in data-driven research, including material informatics, robotics, and computer-aided drug discovery. With the continuously growing virtual synthetically available chemical space, efficient robust quantitative structure–activity relationship (QSAR) methods are required to uncover molecules with desired properties. Herein, we propose variable-length-array ...

Journal: :research in pharmaceutical sciences 0
r sabet a fassihi b moeinifard

quantitative structure-activity relationship (qsar) studies of a series of substituted 3-hydroxy-pyridine-4-ones and 3-hydroxy-pyran-4-ones as antibacterial and antifungal agents against a variety of microorganisms were performed. multiple linear regression approach was used as variable selection method. the antimicrobial activities of these compounds against staphylococcus aureus, aspergilus n...

1-[4-(2-Alkylaminoethoxy)phenylcarbonyl]-3,5-bis(arylidene)-4-piperidones are a novel class of potent cytotoxic agents. These compounds demonstrate low micromolar to submicromolar IC50 values against human Molt 4/C8 and CEM T-lymphocytes and murine leukemia L1210 cells. In this study, a comparative QSAR investigation was performed on a series of 3,5-bis(arylidene)-4-piperidones using different ...

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