Role of Hydrogen Disulfide in Vulcanization

1958 ◽  
Vol 31 (2) ◽  
pp. 353-355
Author(s):  
E. I. Tinyakova ◽  
E. K. Khrennikova ◽  
B. A. Dolgoplosk
Keyword(s):  
Hydrogen Sulfide ◽  
Vulcanization Accelerator ◽  
Free Sulfur

Abstract It was shown that the breakdown of hydrogen disulfide in α-olefins results in the exclusive formation of addition products (mono-, di-, and tetrasulfides) without formation of hydrogen sulfide and free sulfur. Similar results were obtained when sulfur reacted with monoethanolamine (vulcanization accelerator) in α-olefin solution.

Modern Views on the Chemistry of Vulcanization Changes. II. Role of Hydrogen Sulfide

1947 ◽  
Vol 20 (2) ◽  
pp. 353-359 ◽  
Author(s):  
Ralph F. Naylor
Keyword(s):  
Hydrogen Sulfide ◽  
Hydrogen Atom ◽  
Ultraviolet Light ◽  
Radical Reaction ◽  
Radical Type ◽  
Polar Reaction ◽  
Reaction Chain ◽  
Free Sulfur

Abstract 1. The normal addition of hydrogen sulfide to olefins is catalyzed by very small proportions of sulfur, but the rate of addition is too slow to provide a satisfactory basis for the hydrogen sulfide-actuated mechanism of vulcanization. 2. The main products of the sulfur-catalyzed (polar) reaction of hydrogen sulfide with polyisoprenes are substituted pentamethylene sulfides, derived by intramolecular normal addition of the initially formed monothiols. 3. The main products of the ultraviolet light-catalyzed (radical) reaction of hydrogen sulfide with polyisoprenes are monothiols and substituted pentamethylene sulfides, the latter derived by intramolecular abnormal addition. 4. The resemblance of the cyclic sulfides obtained by reaction of free sulfur with polyisoprenes to the products of polar hydrogen sulfide addition (as opposed to the products of the radical-type addition) supports the hypothesis that, in the sulfur-olefin reaction, the radical reaction chain is terminated by the capture of a hydrogen atom by an RS* radical, the thiol so formed adding intramolecularly in a polar reaction catalyzed by sulfur.

The Role of Reactive Oxygen Species, Kinases, Hydrogen Sulfide, and Nitric Oxide in the Regulation of Autophagy and Their Impact on Ischemia and Reperfusion Injury in the Heart

2020 ◽  
Vol 16 ◽  
Author(s):  
Andrey Krylatov ◽  
Leonid Maslov ◽  
Sergey Y. Tsibulnikov ◽  
Nikita Voronkov ◽  
Alla Boshchenko ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Reactive Oxygen Species ◽  
Hydrogen Sulfide ◽  
Ischemia Reperfusion ◽  
Reactive Oxygen ◽  
Ischemia And Reperfusion ◽  
Oxygen Species ◽  
Ischemia And Reperfusion Injury ◽  
Adaptive Process

: There is considerable evidence in the heart that autophagy in cardiomyocytes is activated by hypoxia/reoxygenation (H/R) or in hearts by ischemia/reperfusion (I/R). Depending upon the experimental model and duration of ischemia, increases in autophagy in this setting maybe beneficial (cardioprotective) or deleterious (exacerbate I/R injury). Aside from the conundrum as to whether or not autophagy is an adaptive process, it is clearly regulated by a number of diverse molecules including reactive oxygen species (ROS), various kinases, hydrogen sulfide (H2S) and nitric oxide (NO). The purpose this review is to address briefly the controversy regarding the role of autophagy in this setting and to examine a variety of disparate molecules that are involved in its regulation.

Taurine treatment reverses protein malnutrition-induced endothelial dysfunction of the pancreatic vasculature: the role of hydrogen sulfide

Metabolism ◽  
2021 ◽  
pp. 154701
Author(s):  
Daniele M. Guizoni ◽  
Israelle N. Freitas ◽  
Jamaira A. Victorio ◽  
Isabela R. Possebom ◽  
Thiago R. Araujo ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Endothelial Dysfunction ◽  
Protein Malnutrition ◽  
Taurine Treatment

Role of hydrogen sulfide in cerebrovascular alteration during aging

2019 ◽  
Vol 42 (5) ◽  
pp. 446-454 ◽  
Author(s):  
Juyeon Mun ◽  
Hye-Min Kang ◽  
Junyang Jung ◽  
Chan Park
Keyword(s):  
Hydrogen Sulfide

NaHS inhibits NF-κB signal against inflammation and oxidative stress in post-infectious irritable bowel syndrome

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64208-64214 ◽  
Author(s):  
Shenglan Yang ◽  
Danfang Deng ◽  
Yingying Luo ◽  
Yanran Wu ◽  
Rui Zhu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Irritable Bowel Syndrome ◽  
Hydrogen Sulfide ◽  
Murine Model ◽  
Irritable Bowel ◽  
And Oxidative Stress ◽  
Post Infectious

In this study, the alleviating role of hydrogen sulfide (H2S) was investigated in a Post-Infectious Irritable Bowel Syndrome (PI-IBS) murine model and Caco-2 cells.

scholarly journals Role of molybdenum in corrosion of iron-based alloys in contact with hydrogen sulfide containing solution

2016 ◽  
Vol 68 (6) ◽  
pp. 595-603 ◽  
Author(s):  
G. Genchev ◽  
C. Bosch ◽  
E. Wanzenberg ◽  
A. Erbe
Keyword(s):  
Hydrogen Sulfide ◽  
Iron Based ◽  
Corrosion Of Iron

Hydrogen sulfide-mediated cardioprotection: mechanisms and therapeutic potential

2010 ◽  
Vol 120 (6) ◽  
pp. 219-229 ◽  
Author(s):  
Madhav Lavu ◽  
Shashi Bhushan ◽  
David J. Lefer
Keyword(s):  
Blood Pressure ◽  
Cardiovascular Disease ◽  
Hydrogen Sulfide ◽  
Therapeutic Potential ◽  
Blood Pressure Regulation ◽  
Pressure Regulation ◽  
Signalling Molecule ◽  
Anti Inflammatory ◽  
Antioxidant Effects

H2S (hydrogen sulfide), viewed with dread for more than 300 years, is rapidly becoming a ubiquitously present and physiologically relevant signalling molecule. Knowledge of the production and metabolism of H2S has spurred interest in delineating its functions both in physiology and pathophysiology of disease. Although its role in blood pressure regulation and interaction with NO is controversial, H2S, through its anti-apoptotic, anti-inflammatory and antioxidant effects, has demonstrated significant cardioprotection. As a result, a number of sulfide-donor drugs, including garlic-derived polysulfides, are currently being designed and investigated for the treatment of cardiovascular conditions, specifically myocardial ischaemic disease. However, huge gaps remain in our knowledge about this gasotransmitter. Only by additional studies will we understand more about the role of this intriguing molecule in the treatment of cardiovascular disease.

P12 Role of hydrogen sulfide in heart adaptation to physical training

Nitric Oxide ◽  
2014 ◽  
Vol 39 ◽  
pp. S19-S20
Author(s):  
Vadim Sagach ◽  
Tatiana Shimanskaya ◽  
Yulia Goshovska ◽  
Anatoliy Kotsuruba
Keyword(s):  
Hydrogen Sulfide ◽  
Physical Training

scholarly journals The Pathogenic Role of Cystathionine γ-Lyase/Hydrogen Sulfide in Streptozotocin-Induced Diabetes in Mice

2011 ◽  
Vol 179 (2) ◽  
pp. 869-879 ◽  
Author(s):  
Guangdong Yang ◽  
Guanghua Tang ◽  
Ling Zhang ◽  
Lingyun Wu ◽  
Rui Wang
Keyword(s):  
Hydrogen Sulfide ◽  
Pathogenic Role ◽  
Diabetes In Mice ◽  
Streptozotocin Induced Diabetes
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