نتایج جستجو برای: nuclear independent chemical shift
تعداد نتایج: 1149737 فیلتر نتایج به سال:
Nuclear magnetic resonance ( N M R ) imaging is increasingly being used for medical diagnosis and in scientific research and applications. In practice, it is often difficult to quantitatively relate the image intensity to the nuclear spin density, because other factors complicate a proportional interpretation. These factors include chemical shift, magnetic susceptibility variation, nuclear spin...
هدف از تحقیق حاضر، بررسی تغییراتی بود که در ترجمه انگلیسی به فارسی گروه های اسمی دارای پیش توصیفات طولانی در متون پزشکی رخ می دهد. در این تحقیق سعی بر آن شد که به دو پرسش پاسخ داده شود: (الف) چه نوع تغییراتی در ترجمه انگلیسی به فارسی گروه های اسمی دارای پیش توصیفات طولانی در متون پزشکی رخ می دهد؟ و (ب) بیشترین نوع تغییر کدام میباشد؟ ازنظریه کتفورد در زمینه ی تغییرات ترجمه (translation shifts) ب...
Background: It is well known that shift work produces fatigue. This effect is enhanced in seniors and could be potentiated by physical and psychosocial job demands. The aim of this study was to investigate the combined effects of work-related risk factors, age and shift work on fatigue. Materials and methods: The field study was performed based on a questionnaire about sleep characteristics, e...
Nuclear magnetic resonance based measurements of small molecule mixtures continues to be confronted with the challenge of spectral assignment. While multi-dimensional experiments are capable of addressing this challenge, the imposed time constraint becomes prohibitive, particularly with the large sample sets commonly encountered in metabolomic studies. Thus, one-dimensional spectral assignment ...
The electronic structure and properties of the osmaabenzenes and para substituted osmabenzenes have been explored using the hybrid density functional mpw1pw91 theory. Systematic studies on the substituent effect in para substituted osmabenzenes complexes have been studied. The following substituents were taken into consideration: H, F, CH3,OH, NH2,CN, NO<...
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