نتایج جستجو برای: σ interactions
تعداد نتایج: 409273 فیلتر نتایج به سال:
Hammett constants (σ) can be important factor to understanding substitution and position effects on benzoic acid. This report describes a computational study of ∆G◦ and σ for six substituted benzoic acid (X= F,Cl ,OH ,NH2 ,CN,NO2 )and phenylacetic acid substituted (X=OH ,NH2 ) at para and meta positions ingas and aqueousphases by DFT method and comparesit to available experimental and theoretic...
The objective of this work is to simulate mode II multi-scale fracture propagation in shale by coupling a continuum anisotropic damage model with a Cohesive Zone Model (CZM). The Continuum Damage Mechanics – based Differential Stress Induced Damage (DSID) model is used to represent micro-scale crack evolution. DSID parameters were calibrated against pre-peak points of stress/strain curves obtai...
فروبوم دشت ارژن با جهت شمال خاور در 65 کیلومتری باختر شیراز در اثر فعالیت قطعههایی از گسل فعال کرهبس تشکیل شده است. این فروبوم کششی بخشی از کمربند چینخورده ساده زاگرس است که به وسیله سامانه گسل مرزی ارژن خاوری و باختری و عمود بر طاقدیس کوه شاهنشین و سلامتی دربرگرفته شده است. نمونهبرداری جهتدار از آینههای گسلی دو گسل مرزی برای بازسازی سوگیری دیرینه تنش در تشکیل فروبوم دشت ارژن انجام شده ...
Despite considerable advances over the past years in understanding the mechanisms of action and the role of the σ₁ receptor, several questions regarding this receptor remain unanswered. This receptor has been identified as a useful target for the treatment of a diverse range of diseases, from various central nervous system disorders to cancer. The recently solved issue of the crystal structure ...
We report measurements of the charm-anticharm production asymmetries for Λc , Σ c , Σ 0 c , Σ ++∗ c , Σ 0∗ c , and Λ + c (2625) baryons from the Fermilab photoproduction experiment FOCUS (E831). These asymmetries are integrated over the region where the spectrometer has good acceptance. In addition, we have obtained results for the photoproduction asymmetries of the Λc baryons as functions of p...
Initiation of σ(54)-dependent transcription requires assistance to melt DNA at the promoter site but is impeded by numerous protein-protein and nucleo-protein interactions. To alleviate these inhibitory interactions, hexameric bacterial enhancer binding proteins (bEBP), a subset of the ATPases associated with various cellular activities (AAA+) protein family, are required to remodel the transcr...
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