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Direct Evidence for the Nonrandom Nature of Al Substitution in Zeolite ZSM‐5: An Investigation by 27Al MAS and MQ MAS NMR

Incorporation of Al atoms in particular sites in the ZSM?5 structure is governed by the Si/Al ratio during synthesis, and their distribution over the twelve types of tetrahedral sites (T1?

出版机构:WILEY‐VCH Verlag

刊物名称:Angewandte Chemie International Edition

出版时间:2002

ISSN:1433-7851

数据源:报刊文摘

A 3D doubly sensitivity enhanced X-filtered TOCSY-TOCSY experiment

We present a 3D double sensitivity enhanced X-filtered homonuclear TOCSY-TOCSY experiment for the assignment of unlabeled molecules complexed to labeled protein- or nucleic acid-domains.

出版机构:Springer Netherlands

刊物名称:Journal of Biomolecular NMR

出版时间:2002

ISSN:0925-2738

数据源:报刊文摘

SPINS: Standardized ProteIn NMR Storage. A data dictionary and object-oriented relational database for archiving protein NMR spectra

Modern protein NMR spectroscopy laboratories have a rapidly growing need for an easily queried local archival system of raw experimental NMR datasets.

出版机构:Springer Netherlands

刊物名称:Journal of Biomolecular NMR

出版时间:2002

ISSN:0925-2738

数据源:报刊文摘

High-resolution NMR structure of an AT-rich DNA sequence

We have determined, by proton NMR and complete relaxation matrix methods, the high-resolution structure of a DNA oligonucleotide in solution with nine contiguous AT base pairs. The stretch of AT pairs, TAATTATAA?

出版机构:Springer Netherlands

刊物名称:Journal of Biomolecular NMR

出版时间:2002

ISSN:0925-2738

数据源:报刊文摘

A review on metabolic pathway analysis with emphasis on isotope labeling approach

The main characteristics of metabolic engineering is to treat metabolism as a network or entirety instead of individual reactions.

出版机构:The Korean Society for Biotechnology and Bioengineering

刊物名称:Biotechnology and Bioprocess Engineering

出版时间:2002

ISSN:1226-8372

数据源:报刊文摘

1 H-NMR on Super-Ionic Conductor TI 3 H(SO 4 ) 2

These results indicate that protons migrate even at room temperature: that is, Tl 3 H(SO 4 ) 2 becomes a super-ionic conductor at room temperature. From the temperature dependence of ?

出版机构:Taylor & Francis

刊物名称:Ferroelectrics

出版时间:2002

ISSN:0015-0193

数据源:报刊文摘

A Density Functional Study of the Complex Nature of the Hydrogen-Bond Network and Mechanism of the Antiferroelectric Transition in Squaric Acid

n extensive electronic structure analysis of squaric acid (H 2 C 4 O 4 , SQA) was performed by density functional techniques, including a serie of hydrogen-bonded systems to model the solid state compound. In addition, some magnetic properties were calculated by GIAO method.

出版机构:Taylor & Francis

刊物名称:Ferroelectrics

出版时间:2002

ISSN:0015-0193

数据源:报刊文摘

Synthesis and NMR Spectroscopic Study of a New Bis(aminophosphonate) with Terminal Furyl Groups

1,3-Bis[ N -methyl(diethoxyphosphonyl)-1-(2-furyl)]diaminobenzene has been synthesized through the addition of diethyl phosphite to the Schiff base N , N '-difurfurylidene- m -phenylenediamine. The compound has been characterized by elemental analysis, TLC, IR, and 1 H, 13 C, and 31 P NMR spectra.

出版机构:Taylor & Francis

刊物名称:Phosphorus, Sulfur, and Silicon and the Related Elements

出版时间:2002

ISSN:1042-6507

数据源:报刊文摘

A Synthetic and Stereochemical Study of 2,6-Diaroyl-3,5-Diaryl-4-Ethyltetrahydro-1,4-Thiazine-1,1-Dioxides

Double aza-Michael addition of ethylamine over 2,2'-sulfonylbis(1,3-diarylprop-2-en-1-ones) gave the previously unknown title compounds in moderate yields.

出版机构:Taylor & Francis

刊物名称:Phosphorus, Sulfur, and Silicon and the Related Elements

出版时间:2002

ISSN:1042-6507

数据源:报刊文摘

New Synthetic Route and Characterisation of Phosphorus and Arsenic Heterocyclic Compounds

Herein we report synthetic routes for the preparation of 2-chloro-1,3,2-dioxarsenane 1 , O,O'-bis(5,5-dimethyl-1,3,2-dioxarsenane)-2,2-dimethyl-1,3-propanediol 3 , 2-chloro-1,3,2-dioxaphosphorinane 4 , and 2-fluoro-1,3,2-dioxaphosphorinane 5 .

出版机构:Taylor & Francis

刊物名称:Phosphorus, Sulfur, and Silicon and the Related Elements

出版时间:2002

ISSN:1042-6507

数据源:报刊文摘