ChemInform Abstract: A Novel and Environmental Friendly, One-Step Synthesis of 2,6-Diamino-4-phenyl Pyrimidine-5-carbonitrile Using Potassium Carbonate in Water.

ChemInform ◽  
2008 ◽  
Vol 39 (36) ◽  
Author(s):  
M. B. Deshmukh ◽  
P. V. Anbhule ◽  
S. D. Jadhav ◽  
S. S. Jagtap ◽  
D. R. Patil ◽  
...  
2019 ◽  
Vol 59 ◽  
pp. 166-179 ◽  
Author(s):  
Betül Gürünlü ◽  
Mahmut Bayramoğlu

Graphene is one of the most promising materials discovered in last years. It is usually synthesized by Hummers’ method requiring the usage of many chemicals. As an alternative to traditional methods, in this study a bottom-up synthesis method was developed from various saccharides such as starch, mannose, cellulose, fructose, arabinose, and xylose by carbonization at 600 °C to 800 °C in LiCl/KCl molten salt system. The proposed method is environmental friendly and economic. Graphene yields at 600 °C are higher than at 800 °C. Graphene products give peak at 2θ = 23° on the X-Ray Diffraction (XRD) patterns. As the temperature is increased, amorph structure is observed on the XRD patterns. Raman spectroscopy results show that intensity of D band peak over intensity of G band peak (ID/IG) values of graphene products synthesized from arabinose and cellulose at 600 °C, graphene from arabinose synthesized at 800 °C are 0.76, 0.65 and 0.85 respectively, which show that these products are few-layered. According to X-ray photoelectron spectroscopy (XPS) results, graphene products synthesized at 600 °C have higher carbon content than those synthesized at 800 °C.


Nanoscale ◽  
2021 ◽  
Author(s):  
Zhaokun Ding ◽  
Zhen Liu ◽  
Changfa Xiao

Despite the current efforts, there are huge challenges in preparing the hyper-hydrophobic via environmental-friendly materials and simple methods. In this work, via the phase separation theory, we prepared a fluorine-free...


RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 70461-70472 ◽  
Author(s):  
M. T. H. Aunkor ◽  
I. M. Mahbubul ◽  
R. Saidur ◽  
H. S. C. Metselaar

A one-step, novel, easy, fast, facile, economic, and environmental friendly route to reduce graphene oxide (GO) is studied and explained in this study.


2014 ◽  
Vol 39 ◽  
pp. 47-50 ◽  
Author(s):  
Maria Laura Mercuri ◽  
Angela Serpe ◽  
Luciano Marchiò ◽  
Flavia Artizzu ◽  
Davide Espa ◽  
...  

Author(s):  
R.P. Goehner ◽  
W.T. Hatfield ◽  
Prakash Rao

Computer programs are now available in various laboratories for the indexing and simulation of transmission electron diffraction patterns. Although these programs address themselves to the solution of various aspects of the indexing and simulation process, the ultimate goal is to perform real time diffraction pattern analysis directly off of the imaging screen of the transmission electron microscope. The program to be described in this paper represents one step prior to real time analysis. It involves the combination of two programs, described in an earlier paper(l), into a single program for use on an interactive basis with a minicomputer. In our case, the minicomputer is an INTERDATA 70 equipped with a Tektronix 4010-1 graphical display terminal and hard copy unit.A simplified flow diagram of the combined program, written in Fortran IV, is shown in Figure 1. It consists of two programs INDEX and TEDP which index and simulate electron diffraction patterns respectively. The user has the option of choosing either the indexing or simulating aspects of the combined program.


2006 ◽  
Vol 73 ◽  
pp. 85-96 ◽  
Author(s):  
Richard J. Reece ◽  
Laila Beynon ◽  
Stacey Holden ◽  
Amanda D. Hughes ◽  
Karine Rébora ◽  
...  

The recognition of changes in environmental conditions, and the ability to adapt to these changes, is essential for the viability of cells. There are numerous well characterized systems by which the presence or absence of an individual metabolite may be recognized by a cell. However, the recognition of a metabolite is just one step in a process that often results in changes in the expression of whole sets of genes required to respond to that metabolite. In higher eukaryotes, the signalling pathway between metabolite recognition and transcriptional control can be complex. Recent evidence from the relatively simple eukaryote yeast suggests that complex signalling pathways may be circumvented through the direct interaction between individual metabolites and regulators of RNA polymerase II-mediated transcription. Biochemical and structural analyses are beginning to unravel these elegant genetic control elements.


2010 ◽  
Vol 43 (18) ◽  
pp. 16
Author(s):  
MATTHEW R.G. TAYLOR
Keyword(s):  

2007 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
C.W. Kim ◽  
Y.H. Kim ◽  
H.G. Cha ◽  
D.K. Lee ◽  
Y.S. Kang

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