CuI / L‐proline‐catalyzed synthesis of bis(2‐(4, 5‐diaryl‐1 H ‐imidazol‐2‐yl)phenyl)sulfane derivatives using potassium ethylxanthate as a sulfur source

2021 ◽  
Author(s):  
Yan Zhang ◽  
Tuan‐Jie Li ◽  
Lanlan Lv ◽  
Jian‐Quan Liu ◽  
Xiang‐Shan Wang
Keyword(s):  
Sulfur Source

I2 Promoted Synthesis of 2-Aminothiadiazoles Employing KSCN as a Sulfur Source Under Metal-Free Conditions

2019 ◽  
Vol 2019 (38) ◽  
pp. 6561-6565 ◽  
Author(s):  
Fuyuan Zhu ◽  
Zhaohua Yan ◽  
Chengmei Ai ◽  
Yanmei Wang ◽  
Sen Lin
Keyword(s):  
Sulfur Source ◽  
Metal Free

Concomitant induction to few-layer and 1T-rich two-dimensional MoS2 by rigid segment-containing polysulfide as a sulfur source and in situ intercalator

2021 ◽  
Author(s):  
Yijuan Wang ◽  
Jianzhi Wang ◽  
Jie Liu ◽  
Zhuangwei Xiao ◽  
Yanan Xue ◽  
...  
Keyword(s):  
Sulfur Source ◽  
Two Dimensional ◽  
Rigid Segment

A rigid segment-containing polysulfide was used as a sulfur source and in situ intercalator to induce the formation of few-layer and 1T-rich MoS2.

scholarly journals Laboratory Test to Evaluate the Resistance of Cementitious Materials to Biodeterioration in Sewer Network Conditions

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 686
Author(s):  
Amr Aboulela ◽  
Matthieu Peyre Lavigne ◽  
Amaury Buvignier ◽  
Marlène Fourré ◽  
Maud Schiettekatte ◽  
...  
Keyword(s):  
Calcium Aluminate ◽  
Standardized Test ◽  
Performance Indicator ◽  
Cementitious Materials ◽  
Test Method ◽  
Sustainable Construction ◽  
Public Health Issue ◽  
Sulfur Source ◽  
Test Protocol ◽  
Wide Range

The biodeterioration of cementitious materials in sewer networks has become a major economic, ecological, and public health issue. Establishing a suitable standardized test is essential if sustainable construction materials are to be developed and qualified for sewerage environments. Since purely chemical tests are proven to not be representative of the actual deterioration phenomena in real sewer conditions, a biological test–named the Biogenic Acid Concrete (BAC) test–was developed at the University of Toulouse to reproduce the biological reactions involved in the process of concrete biodeterioration in sewers. The test consists in trickling a solution containing a safe reduced sulfur source onto the surface of cementitious substrates previously covered with a high diversity microbial consortium. In these conditions, a sulfur-oxidizing metabolism naturally develops in the biofilm and leads to the production of biogenic sulfuric acid on the surface of the material. The representativeness of the test in terms of deterioration mechanisms has been validated in previous studies. A wide range of cementitious materials have been exposed to the biodeterioration test during half a decade. On the basis of this large database and the expertise gained, the purpose of this paper is (i) to propose a simple and robust performance criterion for the test (standardized leached calcium as a function of sulfate produced by the biofilm), and (ii) to demonstrate the repeatability, reproducibility, and discriminability of the test method. In only a 3-month period, the test was able to highlight the differences in the performances of common cement-based materials (CEM I, CEM III, and CEM V) and special calcium aluminate cement (CAC) binders with different nature of aggregates (natural silica and synthetic calcium aluminate). The proposed performance indicator (relative standardized leached calcium) allowed the materials to be classified according to their resistance to biogenic acid attack in sewer conditions. The repeatability of the test was confirmed using three different specimens of the same material within the same experiment and the reproducibility of the results was demonstrated by standardizing the results using a reference material from 5 different test campaigns. Furthermore, developing post-testing processing and calculation methods constituted a first step toward a standardized test protocol.

Hedgehog-like Bi2S3 nanostructures: a novel composite soft template route to the synthesis and sensitive electrochemical immunoassay of the liver cancer biomarker

2021 ◽  
Vol 57 (14) ◽  
pp. 1766-1769
Author(s):  
Jiawen Cao ◽  
Pu Ouyang ◽  
Suhua Yu ◽  
Feng Shi ◽  
Chuanli Ren ◽  
...  
Keyword(s):  
Liver Cancer ◽  
Cancer Biomarker ◽  
Soft Template ◽  
Sulfur Source ◽  
Electrochemical Immunoassay

A new route was proposed to synthesize novel hedgehog-like Bi2S3nanostructure using CTAB-trimellitic acid as a composite soft template and thiourea as the sulfur source, which was used  to construct an effective electrochemical AFP immunosensor.

Highly uniform matchstick-like Ag2S–ZnS hetero-nanorods using dodecanethiol as a sulfur source

2014 ◽  
Vol 126 ◽  
pp. 67-70 ◽  
Author(s):  
Hui Feng ◽  
Junli Wang ◽  
Weiling Fan ◽  
Chi Zhang
Keyword(s):  
Sulfur Source ◽  
Highly Uniform

scholarly journals Green Synthesis of Feather-Shaped MoS2/CdS Photocatalyst for Effective Hydrogen Production

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Yang Liu ◽  
Hongtao Yu ◽  
Xie Quan ◽  
Shuo Chen
Keyword(s):  
Electron Microscopy ◽  
Hydrogen Production ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance ◽  
Sulfur Source ◽  
X Ray ◽  
Transmission Electron ◽  
Microscopy Images ◽  
Effective Hydrogen ◽  
Better Than

MoS2/CdS photocatalyst was fabricated by a hydrothermal method for H2production under visible light. This method used low toxic thiourea as a sulfur source and was carried out at 200°C. Thus, it was better than the traditional methods, which are based on an annealing process at relatively high temperature (above 400°C) using toxic H2S as reducing agent. Scanning electron microscopy and transmission electron microscopy images showed that the morphologies of MoS2/CdS samples were feather shaped and MoS2layer was on the surface of CdS. The X-ray photoelectron spectroscopy testified that the sample was composed of stoichiometric MoS2and CdS. The UV-vis diffuse reflectance spectra displayed that the loading of MoS2can enhance the optical absorption of MoS2/CdS. The photocatalytic activity of MoS2/CdS was evaluated by producing hydrogen. The hydrogen production rate on MoS2/CdS reached 192 μmol·h−1. This performance was stable during three repeated photocatalytic processes.

Sulfur dioxide as a sulfur source in duckweeds (Lemna minor L.)

1976 ◽  
Vol 32 (3) ◽  
pp. 296-297 ◽  
Author(s):  
Chr. Brunold ◽  
K. H. Erismann
Keyword(s):  
Sulfur Dioxide ◽  
Lemna Minor ◽  
Sulfur Source
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