منابع مشابه
Halogen bonds in biological molecules.
Short oxygen-halogen interactions have been known in organic chemistry since the 1950s and recently have been exploited in the design of supramolecular assemblies. The present survey of protein and nucleic acid structures reveals similar halogen bonds as potentially stabilizing inter- and intramolecular interactions that can affect ligand binding and molecular folding. A halogen bond in biomole...
متن کاملCrafting, Crafting, Crafting - Extreme Programming in Classroom?
Extreme Programming (XP) shows several interesting approaches which are very attractive for education. It is centered around early and incremental creation of working software. In the following, the chances XP offers for class are shown – especially for use in a class project, but also for practical phases in all lessons where programming is useful. Finally several common problems which can occ...
متن کاملMotion of Water Molecules and Hydrogen Bonds
The *H N M R spin-lattice relaxation time 7 \ , C1 NQR frequency VQ, and C1 NQR spin-lattice relaxation time 7 \ Q of [ Z n ( H 2 0 ) 6 ] [SnCl6] (zinc hexachlorostannate(IV) hexahydrate) have been measured at temperatures between 77 and 350 K. The NQR spin echo signal with Vq— 15.689 MHz at 77 K showed a positive temperature coefficient attributable to O H C l type H-bonds in the crystal. vQ a...
متن کاملThe Dynamics of Molecules Containing Multiple Bonds
Using the acetylene, ethylene and ethane series, the applicability of the Modified Extended Hiickel Method in the determination of the atomization energies as well as stable configurations of molecules has been demonstrated. It is believed, moreover, that within the procedual framework of our proposed technique the proportionality constants Fa (HH) =2.00, Fa (CH) =1.75, F0(CC) = 2.10 and FW(CC)...
متن کاملMega-scale fabrication by contour crafting
Contour Crafting is a mega scale layered fabrication process which builds large scale three-dimensional parts by depositing paste materials layer by layer at unprecedented speed and with superior surface quality. This paper presents an overview of related research activities and the progress aimed at extending the technology to construction of residential housing units and civil structures.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chem
سال: 2020
ISSN: 2451-9294
DOI: 10.1016/j.chempr.2020.04.016