Potential Use of Hydrogen Fluoride in organic chemical Processes

1940 ◽  
Vol 32 (2) ◽  
pp. 178-184 ◽  
Author(s):  
J. H. Simons
Author(s):  
Gerardo León Albert ◽  
Juan Ignacio Moreno Sánchez ◽  
José Manuel Moreno Angosto ◽  
José Antonio Fernández López ◽  
Beatriz Miguel Hernández

1994 ◽  
Vol 24 (10) ◽  
pp. 2078-2084 ◽  
Author(s):  
Kwei-Nam Law ◽  
Jacques L. Valade

Although jack pine (Pinusbanksiana Lamb.), which represents 20% of the total softwood volume, is one of the most abundant commercial softwood species in Canada, its rate of utilization in pulping is surprisingly low. This paper reviews the literature concerning the physical and chemical properties as well as the pulping characteristics of this species by mechanical, thermomechanical, chemithermomechanical, chemimechanical, and chemical processes to better understand its potential use in papermaking. The objective is to identify the problems related to the use of jack pine so that solutions might be sought to promote its usage. Some recommendations are put forth concerning future research.


2021 ◽  
Vol 28 (1) ◽  
pp. e18353
Author(s):  
Susana Sirvas Cornejo ◽  
Vanesa Buleje ◽  
Licia Salvatierra ◽  
Michael L. Jaramillo

Bacteria and microbial enzymes are biocatalysts and can be used as an alternative to industrial chemical processes. The present study focused on isolating and identifying bacterial strains from shrimp waste, that produce amylases, lipases, proteases and chitinases with potential use on shrimp waste treatment. Thirty-two bacterial strains were isolated, phenotypically characterized, and identified by the API system and the molecular analysis of the 16S rDNA. It was found that 28.13% of the isolated bacterial strains had amylolytic capacity, 87.50% lipolytic, 96.88% proteolytic and 28.13% chitinolytic capacity on agar plates with specific substrates. The genera Bacillus, Burkholderia, Ochrobactrum, Vibrio, Pseudomonas and Shewanella were identified. Bacteria with enzymatic capacities isolated in the present study, could be used to obtain by-products from shrimp waste as well as other industrial applications.


Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2796 ◽  
Author(s):  
Everton Santos ◽  
Charles Carvalho ◽  
Carolina Terzi ◽  
Shirley Nakagaki

Complexes of porphyrins and of other similar tetrapyrrolic macrocycles are extensively explored as catalysts for different chemical processes, and the development of solid catalysts for heterogeneous processes using molecules with the ability to act as multifunctional catalysts in one-pot reactions is increasing and can lead to the wider use of this class of molecules as catalysts. This mini review focuses on the application of this class of complexes as catalysts in a variety of sequential one-pot reactions.


2019 ◽  
Vol 58 (1) ◽  
pp. 201-205 ◽  
Author(s):  
Senka Pantic ◽  
Sanja Radojevic Skodric ◽  
Zlatibor Loncar ◽  
Igor Pantic

Abstract Copper is an essential trace element and is an integral part of many metabolic and other chemical processes in cells and tissues. Copper-based nanoparticles (CuNPs) have wide industrial and engineering applications, as catalysts, sensing materials, part of superconductors, storage systems, and phototermal / thermoelectric materials. In recent years, their potential use in biology and medicine has also contributed to the increased interest by scientific community. Unfortunately, many aspects of CuNP interactions with cells and tissues remain unknown. It is unclear if, in a living organism, CuNPs behave the same way as conventional metallic copper. Possible impact of CuNPs on the functioning of organs such as liver, kidney and brain is of particular concern. This concise review aims to cover recent research on potential CuNP toxicity, with the emphasis on neurotoxocity, nephrotoxicity and hepatotoxicity. Also, potential implications of CuNPs toxicity in fundamental and clinical medicine are discussed.


CCS Chemistry ◽  
2021 ◽  
pp. 1-18
Author(s):  
Carolin Schneider ◽  
Thomas Leischner ◽  
Pavel Ryabchuk ◽  
Ralf Jackstell ◽  
Kathrin Junge ◽  
...  

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