Mechanistic studies on the decomposition of water soluble azo-radical-initiators

1998 ◽  
pp. 2009-2018 ◽  
Author(s):  
Roy U. Rojas Wahl ◽  
Liansheng Zeng ◽  
Stephen A. Madison ◽  
Richard L. DePinto ◽  
Brian J. Shay
Keyword(s):  
Water Soluble ◽  
Mechanistic Studies ◽  
Radical Initiators ◽  
Decomposition Of Water

scholarly journals Reasons for Reduced Moisture Resistance of Sulfur-Extended Asphalt Concrete

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7218
Author(s):  
Huu Tuan Le ◽  
Evgenij V. Korolev ◽  
Anna N. Grishina ◽  
Vitaly A. Gladkikh
Keyword(s):  
Asphalt Concrete ◽  
Water Soluble ◽  
Moisture Resistance ◽  
Physical Processes ◽  
Capillary Structure ◽  
Hydrolytic Decomposition ◽  
Magnesium Salts ◽  
Calcium And Magnesium ◽  
Sulfur Containing ◽  
Decomposition Of Water

The paper presents the results of a study of the mechanism for reducing the moisture resistance of sulfur-extended asphalt concrete. It is shown that a decrease in moisture resistance occurs due to the occurrence of chemical and physical processes. At the same time, it was found that during the manufacture of sulfur-bitumen composites, toxic gases H2S and SO2 are formed, which are capable of interacting with a mineral filler, as well as the interaction of sulfur with a mineral powder with the formation of sulfur-containing water-soluble salts, the extraction of which leads to a decrease in the moisture resistance of sulfur-bitumen materials. The change in the rate of leaching of these substances from the composite is due to the physical process caused by the crystallization of sulfur and the formation of a capillary structure, which significantly increases the rate of leaching of calcium and magnesium salts, which are products of dissolution or hydrolytic decomposition of water-soluble products of the interaction of sulfur, H2S and SO2 gases with calcium and magnesium carbonates. The intensity of chemical and physical processes intensifies with an increase in the amount of sulfur in sulfur-bitumen materials.

Kinetic and Mechanistic Studies on the Reaction of Nitric Oxide with a Water-Soluble Octa-anionic Iron(III) Porphyrin Complex

2005 ◽  
Vol 44 (22) ◽  
pp. 7717-7731 ◽  
Author(s):  
Joo-Eun Jee ◽  
Siegfried Eigler ◽  
Frank Hampel ◽  
Norbert Jux ◽  
Maria Wolak ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Water Soluble ◽  
Mechanistic Studies ◽  
Porphyrin Complex

Decomposition of water-soluble mononitrosyl iron complexes with dithiocarbamates and of dinitrosyl iron complexes with thiol ligands in animal organisms

Nitric Oxide ◽  
2008 ◽  
Vol 18 (3) ◽  
pp. 195-203 ◽  
Author(s):  
Vladimir A. Serezhenkov ◽  
Alexander A. Timoshin ◽  
Tsvetina R. Orlova ◽  
Vasak D. Mikoyan ◽  
Lioudmila N. Kubrinа ◽  
...  
Keyword(s):  
Iron Complexes ◽  
Dinitrosyl Iron Complexes ◽  
Water Soluble ◽  
Thiol Ligands ◽  
Dinitrosyl Iron ◽  
Decomposition Of Water

scholarly journals Investigation of the Immunostimulatory Properties of Oxihumate

2003 ◽  
Vol 58 (3-4) ◽  
pp. 263-267 ◽  
Author(s):  
Gisela Käthe Jooné ◽  
Johan Dekker ◽  
Constance Elizabeth Jansen van Rensburg
Keyword(s):  
Proliferative Response ◽  
Bituminous Coal ◽  
Ex Vivo ◽  
Human Lymphocytes ◽  
Water Soluble ◽  
Hiv Positive ◽  
Wet Oxidation ◽  
Mechanistic Studies ◽  
Stimulation Of

A unique process has been developed to convert bituminous coal by controlled wet oxidation followed by base treatment to a water-soluble humate called oxihumate. The effects of oxihumate on the proliferative response of lymphocytes has been studied in vitro and ex vivo. Oxihumate increased the proliferative response of phytohaemagglutinin-stimulated human lymphocytes, from a concentration of 20 μg/ml and upwards. This response was even more striking in the case of lymphocytes from HIV-infected patients and was not limited to the in vitro setting since similar effects were observed ex vivo following administration of a nontoxic dosage of 4 g oxihumate per day to HIV-positive individuals for two weeks. Mechanistic studies revealed that stimulation of the proliferative response of lymphocytes by oxihumate is associated with an increased production of IL-2, as well as expression of the IL-2 receptor in the setting of decreased production of IL-10. Oxihumate therefore holds promise for the treatment of immunocompromized patients.

Ruthenium-Promoted Acceptorless and Oxidant-Free Lactone Synthesis in Aqueous Medium

Synlett ◽  
2019 ◽  
Vol 30 (06) ◽  
pp. 721-725 ◽  
Author(s):  
Senthilkumar Muthaiah ◽  
Anita Bhatia ◽  
Muthukumar Kannan
Keyword(s):  
Aqueous Medium ◽  
Ruthenium Complexes ◽  
Water Soluble ◽  
Side Product ◽  
Mechanistic Studies ◽  
Hydrogen Acceptor ◽  
Water As Solvent ◽  
Lactone Synthesis

Ruthenium-catalyzed formation of lactones from diols in aqueous medium has been demonstrated. 1,3,5-Triazaphosphaadamantane (PTA) included water-soluble ruthenium complexes [RuCl2(PPh3)(2,6-Py-(CH2-PTA)2]·2Br and [RuCl2(PPh3)2(2-PyCH2PTA)]·Br in the presence of KOH were found to be efficient for the synthesis of lactones from diols. The reported synthetic protocol is green as it uses water as solvent, avoids the use of any hydrogen acceptor/oxidant, and produces hydrogen as the only side product. Mechanistic studies revealed that lactone formation involved aldehyde intermediate and followed dehydrogenative pathway.

Mechanistic Studies on the Reactions of Cyanide with a Water-Soluble Fe(III) Porphyrin and Their Effect on the Binding of NO

2011 ◽  
Vol 50 (8) ◽  
pp. 3413-3424 ◽  
Author(s):  
Maria Oszajca ◽  
Alicja Franke ◽  
Małgorzata Brindell ◽  
Grażyna Stochel ◽  
Rudi van Eldik
Keyword(s):  
Water Soluble ◽  
Mechanistic Studies

MoS2 Films Formed by In-contact Decomposition of Water-soluble Tetraalkylammonium Thiomolybdates

2008 ◽  
Vol 29 (2) ◽  
pp. 155-161 ◽  
Author(s):  
Fernando Chiñas-Castillo ◽  
Javier Lara-Romero ◽  
Gabriel Alonso-Núñez ◽  
Juan de Dios Oscar Barceinas-Sánchez ◽  
Sergio Jiménez-Sandoval
Keyword(s):  
Water Soluble ◽  
Decomposition Of Water
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