Room Temperature Aerobic Peroxidation of Organic Substrates Catalyzed by Cobalt(III) Alkylperoxo Complexes

2021 ◽  
Author(s):  
Yunzhou Chen ◽  
Huatian Shi ◽  
Chi-Sing Lee ◽  
Shek-Man Yiu ◽  
Wai-Lun Man ◽  
...  
Keyword(s):  
Room Temperature ◽  
Organic Substrates

Study of the Influence of Water on Oxidative Properties of Fe3+ in ZSM-5 Zeolite Channels

2002 ◽  
Vol 67 (12) ◽  
pp. 1743-1759 ◽  
Author(s):  
Gabriel Čík ◽  
Milada Hubinová ◽  
František Šeršeň ◽  
Vlasta Brezová
Keyword(s):  
Ion Exchange ◽  
Room Temperature ◽  
Cation Radical ◽  
Organic Substrates ◽  
Cation Radicals ◽  
Influence Of Water

The interactions of phenol and thiophene with Fe3+ ions have been studied in ZSM-5 zeolite channels in the presence of water. The Fe-ZSM-5 was prepared by the ion exchange of Fe3+ for Na+. The Fe3+ ions in zeolite channels have unsaturated co-ordination spheres and oxidize organic substrates (phenol, thiophene) at room temperature. The interaction of Fe3+ with phenol gives rise to the stabilized cation-radical PhOH•+ and thiophene forms low oligomers (2-6 monomeric units). The oligomers are present in the neutral as well as oxidized form as cation-radicals (polarons). The formation of dications (bipolarons) has not been observed.

scholarly journals Low Temperature Platinum Chemical Vapor Deposition on Functionalized Self-Assembled Monolayers

2020 ◽  
Author(s):  
Bryan G. Salazar ◽  
Hanwen Liu ◽  
Amy V. Walker ◽  
Lisa McElwee-White
Keyword(s):  
Vapor Deposition ◽  
Alkyl Radical ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Reaction Pathways ◽  
Self Assembled Monolayers ◽  
Organic Substrates ◽  
Radical Trap ◽  
Assembled Monolayers ◽  
Self Assembled

The reaction pathways of Pt CVD using (COD)PtMe<sub>2-x</sub>Cl<sub>x</sub> (x = 0, 1, 2) have been investigated on functionalized self-assembled monolayers (SAMs) as models for organic substrates. In the presence of 1,4-cyclohexadiene, a well-known alkyl radical trap, Pt deposition was increased by up to 10-fold creating a room-temperature effective Pt CVD process.<br><br>This article has been submitted to the Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films.

Direct fabrication of CaWO4 patterns on cellulose based organic substrates by on-site ink-jet reaction at room temperature

2007 ◽  
Vol 137 (1-3) ◽  
pp. 299-303 ◽  
Author(s):  
Ruwan Gallage ◽  
Ryo Teranishi ◽  
Takeshi Fujiwara ◽  
Tomoaki Watanabe ◽  
Masahiro Yoshimura
Keyword(s):  
Room Temperature ◽  
Organic Substrates ◽  
Direct Fabrication ◽  
Ink Jet

scholarly journals Low Temperature Platinum Chemical Vapor Deposition on Functionalized Self-Assembled Monolayers

2020 ◽  
Author(s):  
Bryan G. Salazar ◽  
Hanwen Liu ◽  
Amy V. Walker ◽  
Lisa McElwee-White
Keyword(s):  
Vapor Deposition ◽  
Alkyl Radical ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Reaction Pathways ◽  
Self Assembled Monolayers ◽  
Organic Substrates ◽  
Radical Trap ◽  
Assembled Monolayers ◽  
Self Assembled

The reaction pathways of Pt CVD using (COD)PtMe<sub>2-x</sub>Cl<sub>x</sub> (x = 0, 1, 2) have been investigated on functionalized self-assembled monolayers (SAMs) as models for organic substrates. In the presence of 1,4-cyclohexadiene, a well-known alkyl radical trap, Pt deposition was increased by up to 10-fold creating a room-temperature effective Pt CVD process.<br><br>This article has been submitted to the Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films.

scholarly journals Screening of Organic Substrates for Solid-State Fermentation, Viability and Bioefficacy of Trichoderma harzianum AS12-2, a Biocontrol Strain Against Rice Sheath Blight Disease

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1258 ◽  
Author(s):  
Shahram Naeimi ◽  
Vahid Khosravi ◽  
András Varga ◽  
Csaba Vágvölgyi ◽  
László Kredics
Keyword(s):  
Rice Straw ◽  
Rice Husk ◽  
Room Temperature ◽  
Organic Substrates ◽  
Sheath Blight Disease ◽  
Beet Pulp ◽  
Broom Sorghum ◽  
Blight Disease ◽  
One Year ◽  
Sorghum Grain

The present study was undertaken to find the most suitable organic substrates for the biomass production, viability and efficacy of the biocontrol strain Trichoderma harzianum AS12-2 in the solid-state fermentation system. In total, 13 inexpensive, locally available substrates (agricultural wastes or by-products) were inoculated with the antagonist, and following one month of incubation at room temperature, all colonized substrates were air dried and ground to powder. The shelf life and viability of the Trichoderma strain were assessed as colony-forming units per gram (CFUs g−1) of each substrate on a monthly basis for up to one year at room temperature (25 ± 2 °C) and in the refrigerator (4 °C). In order to find out the effect of the substrate on the bioefficacy of T. harzianum AS12-2, the biocontrol potential of the formulations was evaluated against rice sheath blight disease caused by Rhizoctonia solani. The results showed that the fungus colonized more or less all substrates after one month, although the degree of colonization and conidiation was different among the substrates, being especially high in broom sorghum grain, rice husk, rice straw, rice bran and sugar beet pulp. Analysis of variance (ANOVA) of the population in the substrates in “Month 0” showed that the effect of treatment was significant, and the means were significantly different. The maximum population was recorded for broom sorghum grain and rice straw (6.4 × 1010 and 5.3 × 1010 CFUs g−1, respectively). The population declined in all substrates after one year of incubation at room temperature. This decline was relatively smaller in broom sorghum grain, rice straw and rice husk. On the other hand, the population in the same substrate incubated in the refrigerator was decreased in a mild slope, and the final population was high. In addition, the results of greenhouse assay showed that all bioformulations were effective in controlling the disease, and there were no significant differences among the substrates. According to the results of this study, broom sorghum grain, rice husk, rice straw, sugar beet pulp and cow dung could be recommended as suitable fermentation media for the industrial-scale production of T. harzianum strains.

scholarly journals A Tentative Model to Describe the Respiration of Stored Apples

1991 ◽  
Vol 116 (3) ◽  
pp. 478-481 ◽  
Author(s):  
G. Andrich ◽  
R. Fiorentini ◽  
A. Tuci ◽  
A. Zinnai ◽  
G. Sommovigo
Keyword(s):  
Room Temperature ◽  
Enzymatic Oxidation ◽  
Limiting Factor ◽  
Organic Substrates ◽  
Controlled Atmosphere Storage ◽  
Commercial Scale ◽  
Tentative Model ◽  
Mathematical Equations ◽  
Atmosphere Storage ◽  
Menten Constant

Using mathematical equations that describe the 02 mass-transfer and the enzymatic oxidation of the organic substrates of apples (Malus domestica Borkh.), we developed a kinetic model to correlate fruit respiration rate with environmental oxygen partial pressure (PO2. The kinetic determinations were carried out at room temperature using apples stored at 3 to 4C for 11 to 19 weeks. Results show that: 1) the calculated value of the Michaelis-Menten constant related to the enzymatic oxidation of the respiratory substrate (Km = 2.1 ± 0.5.10-5 mol·kg-1) is close to that reported in the literature for cytochrome-c oxidase; 2) the located range of PO2 levels where 02 becomes the limiting factor in the respiration process (near 2.6 kPa at T = 20.5 ± lC) is close to those usually used on a commercial scale for controlled atmosphere storage.

scholarly journals Germination and growth of the tree Handroanthus chrysanthus (Bignoniaceae) under nursery conditions

2020 ◽  
Vol 12 (2) ◽  
pp. e3175
Author(s):  
Henry Hernan Medina Arroyo ◽  
Jhon Jerley Torres Torres ◽  
Carlos Alexis Palacios Palacios ◽  
Bayron Alexander Ruiz Blandón ◽  
Melida Martínez Guardia ◽  
...  
Keyword(s):  
Room Temperature ◽  
Selective Logging ◽  
Chicken Manure ◽  
Organic Substrates ◽  
River Sand ◽  
Alluvial Sand ◽  
Main Components ◽  
Germination And Growth ◽  
Growth Of Seedlings ◽  
Germinated Seeds

Introduction: Selective logging of forests has significantly diminished the densities of Handroanthus chrysantha Jacq. in Colombia. Therefore, there is a need for studies that contribute to its management. Objective: We aimed to evaluate seed germination and the growth of seedlings under nursery conditions. Methods: Four pre-germinative, four organic substrates and two luminosity conditions were tested. We used a random multifactorial experimental design composed of 32 controlled factors. The main components were immersion of seeds in water at room temperature at different times, combinations of organic substrates and exposure of the factors to shade and sun. Results: We recorded 395 and 290 germinated seeds, corresponding to 51 and 38% of the total sown under shade and sun, respectively. The factors with the best germination values were immersion for 24 hours with alluvial sand and immersion for 24 hours with river sand of mixed with ant soil (2:1) under shade and, without immersion with alluvial sand+ground of ant 2:1 and immersion for 24 hours with chicken manure+ant soil 2:1 under sun. The highest growth in height, vigour and survival was observed in seedlings exposed to full sunlight in any of the combinations of organic substrates. Conclusion: The propagation of H. chrysantha should germinate the seeds under shadow and then expose them to the sun to stimulate their growth..  

Dependence of Intergranular Fracture on Boundary Topography and Cohesion

1973 ◽  
Vol 31 ◽  
pp. 150-151
Author(s):  
J. E. Doherty ◽  
A. F. Giamei ◽  
B. H. Kear ◽  
C. W. Steinke
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Boundary Shear ◽  
Room Temperature Ductility ◽  
Solid Solution Matrix ◽  
Nickel Base ◽  
Solution Matrix ◽  
Different Levels ◽  
Base Superalloy

Recently we have been investigating a class of nickel-base superalloys which possess substantial room temperature ductility. This improvement in ductility is directly related to improvements in grain boundary strength due to increased boundary cohesion through control of detrimental impurities and improved boundary shear strength by controlled grain boundary micros true tures.For these investigations an experimental nickel-base superalloy was doped with different levels of sulphur impurity. The micros tructure after a heat treatment of 1360°C for 2 hr, 1200°C for 16 hr consists of coherent precipitates of γ’ Ni3(Al,X) in a nickel solid solution matrix.

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