نتایج جستجو برای: 4h benzohchromenes

تعداد نتایج: 6735  

Journal: :Chemical communications 2008
Xiaomei Huang Zhiqian Guo Weihong Zhu Yongshu Xie He Tian

A new red fluorescent sensor DCCP-Cu2+ based on dicyanomethylene-4H-chromene shows turn-on fluorescence with high selectivity for pyrophosphate over other anions.

Journal: :Chemical communications 2013
David Cáceres Cristina Cebrián Antonio M Rodríguez José R Carrillo Ángel Díaz-Ortiz Pilar Prieto Fátima Aparicio Fátima García Luis Sánchez

Ribbon-like supramolecular structures prepared by the organized aggregation of 4-aryl-4H-1,2,4-triazoles act as optical waveguides that propagate photoluminescence.

Journal: :Foco 2022

Entre os vários politipos do carbeto de silício ( -SiC), o 4H-SiC é reconhecido como semicondutor mais atraente para operação em dispositivos eletrônicos alta potência, frequência e temperatura devido a seu maior gap mobilidade portadores que outros politipos. Neste artigo foram determinados deslocamento velocidade dos elétrons condução no na forma dopado tipo . O transporte foi obtido utilizan...

Journal: :South African journal of chemistry 2021

ABSTRACT A simple and efficient approach has been developed to synthesise novel functionalised 5H-chromeno[2,3-d] pyrimidines derivatives (4a-h). This entails treating 2-amino-3-cyano-4H-chromenes (3a-h) with formamidine acetate under microwave irradiations solvent-free conditions. All structures of new compounds obtained in this study were characterised by IR, MS, 1H 13C NMR analysis. Addition...

Journal: :AIP Advances 2023

In recent years, 4H-SiC power devices have been widely employed in electronic systems owing to their superior performance Si devices. However, stacking faults can degrade the device performance. Stacking be considered as polytype inclusions 4H-SiC. Carrier recombination is a cause for degradation. Understanding carrier different polytypes other than helpful understanding mechanism of degradatio...

2012
Ruby N. Ghosh Reza Loloee

SiC based capacitive devices have the potential to operate in high temperature, chemically corrosive environments provided that the electrical integrity of the gate oxide and metallization can be maintained in these environments. We report on the performance of large area, up to 8 x 10 -3 cm, field-effect capacitive sensors fabricated on both the 4H and 6H polytypes at 600°C. Large area capacit...

A Foroumadi A Shafiee L Firoozpour M Abbasi M Mahdavi SA Tabatabai T Akbarzadeh V Sheibani

Two novel 3-amino-5-(4-choloro-2-phenoxyphenyl)-4H-1,2,4-triazole derivatives were prepared and their anticonvulsant activity was measured by evaluation of the ability of these compounds to protect mice against convulsion induced by lethal doses of pentylenetetrazole (PTZ). Diazepam (Sigma) was considered as a positive control drug with anticonvulsant effect [ED50 = 1.2 (0.5-1.9) mg/Kg]. Amongs...

Journal: :Dalton transactions 2015
Rajendra S Dhayal Jian-Hong Liao Hsing-Nan Hou Ria Ervilita Ping-Kuei Liao C W Liu

Neutral tetrahedral [Cu4(Se2CNnPr2)4] (1), monocationic hydride-centered tetracapped tetrahedral [Cu8(H){Se2CNR2}6]+ (R = nPr, 2H; Et, 3H) and neutral hydride-centered tricapped tetrahedral [Cu7(H){Se2CNR2}6] (R = nPr, 4H; Et, 5H) clusters were formed. They are the first Cu(I) complexes supported by dialkyl diselenocarbamates. The as-synthesized complexes 2H and 3H, formed from a reaction mixtu...

2013
Mohamed Nashrudin Naharudin Ashril Yusof

BACKGROUND Since hypohydration commonly occurs in sports, studies on anaerobic exercise performance under this condition have been extensively carried out. When describing anaerobic performance, authors usually refer to a drop in anaerobic performance as fatigue index (FI) which is conventionally calculated using peak and low power data points. Meanwhile, another possible method in explaining a...

Journal: :Biophysical journal 2014
Segun Jung Tamar Schlick

RNA junctions are common secondary structural elements present in a wide range of RNA species. They play crucial roles in directing the overall folding of RNA molecules as well as in a variety of biological functions. In particular, there has been great interest in the dynamics of RNA junctions, including conformational pathways of fully base-paired 4-way (4H) RNA junctions. In such constructs,...

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