نتایج جستجو برای: x ray crystallography

تعداد نتایج: 669246  

2017
Matthew K .Higgins Susan M Lea

While protein crystallography has, for many years, been the most used method for structural analysis of macromolecular complexes, remarkable recent advances in high-resolution electron cryo-microscopy led to suggestions that 'the revolution will not be crystallised'. Here we highlight the current success rate, speed and ease of modern crystallographic structure determination and some recent tri...

FeCl3.6H2O was used as an efficient catalyst for the synthesis of highly functionalized piperidines via a one-pot five-component reaction of aromatic amines, aromatic aldehydes and β-keto esters in EtOH at room temperature. The remarkable advantages offered by this method are good yields, simple procedure, short reaction times, no need to column chromatography and easy work-up. The structures o...

The reactions of Pb(N0 ) and Pb(SCN)2 with 2-(aminomethy1)pyridine (C H N = L) yielded colourless crystals of L Pb(N0 ) ( I ) and L Pb(SCN) , (2), respectively. Their structures were determined by X-ray crystallography. Crystal data: 1, monoclinic, P2 /c, a = 9.263 (4) ?, b = 7.783 (2) ?, c = 6.692 (3) ?, ? = 101.26 (2)?, Z = 2, Mo K?, 1540 observed (I > 2.5 ?(I) data (22 ? C), R = 0...

Journal: :Molbank 2022

X-ray crystallography was used to characterise the title compound for first time, and 1H NMR, 13C NMR IR spectroscopic data from earlier reports were also updated.

Journal: :Protein science : a publication of the Protein Society 2016
John K Everett Roberto Tejero Sarath B K Murthy Thomas B Acton James M Aramini Michael C Baran Jordi Benach John R Cort Alexander Eletsky Farhad Forouhar Rongjin Guan Alexandre P Kuzin Hsiau-Wei Lee Gaohua Liu Rajeswari Mani Binchen Mao Jeffrey L Mills Alexander F Montelione Kari Pederson Robert Powers Theresa Ramelot Paolo Rossi Jayaraman Seetharaman David Snyder G V T Swapna Sergey M Vorobiev Yibing Wu Rong Xiao Yunhuang Yang Cheryl H Arrowsmith John F Hunt Michael A Kennedy James H Prestegard Thomas Szyperski Liang Tong Gaetano T Montelione

We have developed an online NMR / X-ray Structure Pair Data Repository. The NIGMS Protein Structure Initiative (PSI) has provided many valuable reagents, 3D structures, and technologies for structural biology. The Northeast Structural Genomics Consortium was one of several PSI centers. NESG used both X-ray crystallography and NMR spectroscopy for protein structure determination. A key goal of t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه - دانشکده علوم 1391

از زمانی که کمپلکس های فلزی شامل لیگاند های چهاردندانه با الکترون های غیرمستقرشان به عنوان هدایت کننده های خوبی معرفی شدند، شیمی کئوردیناسیون کمپلکس های فلز های واسطه پلی کربوکسیلات آروماتیک در شیمی معدنی، مورد توجه فراوان قرار گرفته است. در این کار ما سنتز کمپلکس های فلزهای واسطه (آهن و کبالت) از واکنش 1و2و4و5 -بنزن تترا کربوکسیلیک و آمین آلیفاتیک در آب را گزارش دادیم. این ترکیبات با استفاده ...

Journal: :Cell 2014
Patrick Cramer

To celebrate a century of X-ray crystallography, I describe how 100 crystal structures influenced chromatin and transcription research.

Journal: :Chemical communications 2001
L S Shimizu M D Smith A D Hughes K D Shimizu

A bis-urea macrocycle 1 was synthesized and shown to form extended nanotubular columns by X-ray crystallography.

2016
Sam Horrell Svetlana V. Antonyuk Robert R. Eady S. Samar Hasnain Michael A. Hough Richard W. Strange

Relating individual protein crystal structures to an enzyme mechanism remains a major and challenging goal for structural biology. Serial crystallography using multiple crystals has recently been reported in both synchrotron-radiation and X-ray free-electron laser experiments. In this work, serial crystallography was used to obtain multiple structures serially from one crystal (MSOX) to study i...

Journal: :Chemical communications 2004
Gabriela A Grasa Rohit Singh Natalie M Scott Edwin D Stevens Steven P Nolan

The reactivity of a N-heterocyclic carbene (NHC) with a pseudo-acid (ester in this case) is described. The product results from an unusual C-H bond activation. The structure of the product has been established by a single crystal diffraction study.

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