Thermodynamics of left-handed
نویسنده
چکیده
The thermodynamics of rightand left-handed helix formation by poly[d(G-C)].poly[d(G-C)] and by poly(dG-mSdC).poly(dG-msdC) were measured spectrophotometrically and calorimetrically. From the spectrophotometric measurements the thermal stabilities of the alternative helical conformations were evaluated as a function of counterion concentration. From the calorimetric measurements the enthalpies of either right-handed or left-handed helix formation were determined. The corresponding experimental AH values are -8.6 and -11.2 kcal/mol base pairs for the two conformations in poly[dG-C)].poly[d(G-C)], and -9.0 and -12.7 kcal/mol base pairs, respectively, for poly(dG-m”dC).poly(dG-m*dC).
منابع مشابه
پرده صماخ و چپ دستها T.M and left handed
ABCTRACT: To find out what percentage of the men are left-handed or as a rule use their left hand for writing or do precise or complicated jobs is to question them directly. Neurologists believe that less than 10 percent of people are left - handed. In our study, we should like to know the correct percentage of the men living in Rasht are left -handed . This study is statistically based on m...
متن کاملمقایسه معاینات پریودنتال دانشجویان دندانپزشکی راست دست و چپ دست در اندازهگیری عمق پاکت پریودنتال
Background and Aims: The precision of periodontal pocket measurements with periodontal probe is related to different factors. Some of these are related to examiner. The purpose of this study was to compare the right-handed and left-handed dental students in the measurement of periodontal pocket depth (PPD).Materials and Methods: Eight systemically healthy adult patients (mean age of 35 years) w...
متن کاملSexual Dimorphism in Surface Anatomical Parameters of Human Cerebral Cortex in Different Lebes in Normal and Neurodegenerative Subjects: a Stereological and Macroscopical Study
Purpose: This study sought to determine sex differences in surface anatomical parameters (thickness and surface areas) of human cerebral cortex in different lobes of the left hemisphere in normal right-handed subjects and right-handed subjects suffering from Alzheimer and Parkinson's diseases. Materials and Methods: This cross-sectional descriptive study was performed on 72 normal human brains...
متن کاملSexual Dimorphism in Volume of Parahippocampal Cortex in Normal and Neurodegenerative Subjects- A Stereological and Macroscopical Study
Purpose: This study is designed to determine the sex differences in volume of the left parahippocampal cortex in right-handed normal subjects and the right-handed subjects which were suffered from Alzheimer and parkinson diseases. Materials and Methods: This study was performed on 72 normal human brains (38 males, 34 females), 11 brains suffered from Alzheimer (4 males, 7 females), and 13 brai...
متن کاملAnalytical Investigation of TM Surface Waves in 1D Photonic Crystals Capped by a Self-Focusing Left-Handed Slab
In this paper, the localized TM surface waves of a nonlinear self-focusingleft-handed slab sandwiched between a uniform medium and a one-dimensionalphotonic crystal (1D PC) is analytically investigated. Our method is based on the firstintegral of the nonlinear Maxwell's equations. For the TM surface waves, the presenceof two electric field components makes the analysis difficult. Therefore, we ...
متن کامل