Data on the Distribution of Organic Sulfur Functional Groups in Coals

1981 ◽  
pp. 239-256 ◽  
Author(s):  
AMIR ATTAR ◽  
FRANCOIS DUPUIS
Keyword(s):  
Functional Groups ◽  
Organic Sulfur

Transformation of organic sulfur and its functional groups in nantong and laigang coal under microwave irradiation

2019 ◽  
Vol 40 (31) ◽  
pp. 2749-2760 ◽  
Author(s):  
Yue Wu ◽  
Shengfu Zhang ◽  
Shuangshuang Cai ◽  
Xiong Xiao ◽  
Cheng Yin ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Functional Groups ◽  
Organic Sulfur

Characterization of organic sulfur functional groups in coal by means of temperature programmed reduction

1987 ◽  
Vol 15 ◽  
pp. 363-376 ◽  
Author(s):  
B.B. Majchrowicz ◽  
J. Yperman ◽  
G. Reggers ◽  
J.P. François ◽  
J. Gelan ◽  
...  
Keyword(s):  
Functional Groups ◽  
Organic Sulfur ◽  
Temperature Programmed Reduction ◽  
Temperature Programmed

Grafting of organic sulfur-containing functional groups on activated carbon for gold(I) adsorption from thiosulfate solution

2019 ◽  
Vol 185 ◽  
pp. 102-110 ◽  
Author(s):  
Yunlong Chen ◽  
Futing Zi ◽  
Xianzhi Hu ◽  
Hong Yu ◽  
Yanhe Nie ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Functional Groups ◽  
Organic Sulfur ◽  
Sulfur Containing

Organic sulfur compounds containing functional groups

1982 ◽  
Vol 31 (6) ◽  
pp. 1225-1231
Author(s):  
A. R. Derzhinskii ◽  
V. E. Kalugin ◽  
E. N. Prilezhaeva
Keyword(s):  
Functional Groups ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Organic Sulfur Compounds

S–S Bond Formation: Nanocatalysts in the Oxidative Coupling of Thiols

2017 ◽  
Vol 70 (1) ◽  
pp. 9 ◽  
Author(s):  
Lotfi Shiri ◽  
Arash Ghorbani-Choghamarani ◽  
Mosstafa Kazemi
Keyword(s):  
Catalytic Activity ◽  
Functional Groups ◽  
Oxidative Coupling ◽  
Biological Activities ◽  
Bond Formation ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Diverse Range ◽  
Organic Sulfur Compounds ◽  
Synthetic Intermediates

Compounds containing sulfur–sulfur bonds (often called disulfides or more specifically disulfanes) are arguably one of the most valuable functional groups in organic synthetic chemistry. They exist extensively in nature, in which they exhibit important biological activities. Furthermore, a diverse range of natural and synthetic disulfides have been discovered that have many applications as pharmaceutical and agriculture chemicals as well as synthetic intermediates. Since thiols are commercially accessible or easily synthesizable materials and their choice as starting materials is widely reported for the synthesis of organic sulfur compounds, unsurprisingly the oxidative coupling of thiols is the best and simplest route for the preparation of disulfides. In recent times, nanocatalysts have shown excellent catalytic activity and reusability in the oxidation of thiols to disulfides. Herein, we summarize the recently reported breakthroughs in the use of nanocatalysts for the oxidative coupling of thiols to their corresponding disulfides, with the goal of stimulating further progress in this field.

Improving integration between functional groups: A case in organization change and implications for theory and practice

1971 ◽  
Author(s):  
Warren G. Bennis ◽  
Michael Beer ◽  
Gerald R. Pieters ◽  
Alan T. Hundert ◽  
Samuel H. Marcus ◽  
...  
Keyword(s):  
Functional Groups ◽  
Organization Change ◽  
Theory And Practice

HYDROXYAPATITE, ALGINATE, AND CHITOSAN FOR BONE SCAFFOLDS: SPECTROSCOPY STUDY

2016 ◽  
Vol 19 (2) ◽  
pp. 93-100
Author(s):  
Lalita El Milla
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Functional Groups ◽  
Bone Growth ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Tissue Engineering Scaffolds ◽  
Hydroxyapatite Powder ◽  
Materials Used

Scaffolds is three dimensional structure that serves as a framework for bone growth. Natural materials are often used in synthesis of bone tissue engineering scaffolds with respect to compliance with the content of the human body. Among the materials used to make scafffold was hydroxyapatite, alginate and chitosan. Hydroxyapatite powder obtained by mixing phosphoric acid and calcium hydroxide, alginate powders extracted from brown algae and chitosan powder acetylated from crab. The purpose of this study was to examine the functional groups of hydroxyapatite, alginate and chitosan. The method used in this study was laboratory experimental using Fourier Transform Infrared (FTIR) spectroscopy for hydroxyapatite, alginate and chitosan powders. The results indicated the presence of functional groups PO43-, O-H and CO32- in hydroxyapatite. In alginate there were O-H, C=O, COOH and C-O-C functional groups, whereas in chitosan there were O-H, N-H, C=O, C-N, and C-O-C. It was concluded that the third material containing functional groups as found in humans that correspond to the scaffolds material in bone tissue engineering.

High Resolution Displacement of Functional Groups onto Fluorocarbon Resin Surface by Using ArF Excimer Laser

1996 ◽  
Vol 451 ◽  
Author(s):  
T. Shimizu ◽  
M. Murahara
Keyword(s):  
Contact Angle ◽  
High Resolution ◽  
Laser Beam ◽  
Thin Layer ◽  
Functional Groups ◽  
Excimer Laser ◽  
Laser Fluence ◽  
Large Area ◽  
Three Solutions ◽  
Arf Excimer Laser

ABSTRACTA Fluorocarbon resin surface was selectively modified by irradiation with a ArF laser beam through a thin layer of NaAlO2, B(OH)3, or H2O solution to give a hydrophilic property. As a result, with low fluence, the surface was most effectively modified with the NaAlO2 solution among the three solutions. However, the contact angle in this case changed by 10 degrees as the fluence changed only 1mJ/cm2. When modifying a large area of the surface, high resolution displacement could not be achieved because the laser beam was not uniform in displacing functional groups. Thus, the laser fluence was successfully made uniform by homogenizing the laser beam; the functional groups were replaced on the fluorocarbon resin surface with high resolution, which was successfully modified to be hydrophilic by distributing the laser fluence uniformly.

Sign in / Sign up

Export Citation Format

Share Document