Homogeneous branched-chain explosion: Initiation to completion

1978 ◽  
Vol 12 (3) ◽  
pp. 221-235 ◽  
Author(s):  
A. K. Kapila
Keyword(s):  
Branched Chain ◽  
Chain Explosion

Quantitative description of chain explosion by a linear approximation of the theory of branched chain processes

1987 ◽  
Vol 36 (9) ◽  
pp. 1954-1957
Author(s):  
E. N. Aleksandrov ◽  
V. S. Arutyunov ◽  
I. V. Dubrovina ◽  
S. N. Kozlov
Keyword(s):  
Linear Approximation ◽  
Quantitative Description ◽  
Chain Processes ◽  
Branched Chain ◽  
Chain Explosion

Shock Tube Studies of the Reactions of Hydrogen Atoms. I. The Reaction H + NH3 → H2 + NH2

1974 ◽  
Vol 52 (7) ◽  
pp. 1171-1180 ◽  
Author(s):  
John E. Dove ◽  
Wing S. Nip
Keyword(s):  
Shock Tube ◽  
Rate Coefficients ◽  
Oh Radicals ◽  
High Concentration ◽  
Hydrogen Atoms ◽  
Elementary Reactions ◽  
Temperature Range ◽  
Reflected Shock ◽  
Branched Chain ◽  
Chain Explosion

The partial equilibrium state following the branched-chain explosion of shock-heated rich H2/O2/diluent mixtures contains a high concentration of H atoms. The conditions under which this state can be used as a source of H atoms for the study of elementary reactions have been investigated. A small amount of NH3 was added to H2/O2/inert gas mixtures in order to measure the rate of the reaction H + NH3 → H2 + NH2. The pseudo-first order decay of NH3 in an approximately ten-fold excess of H atoms was followed by a time-of-flight mass spectrometer which sampled from the reflected shock region in a shock tube. The rate coefficient for this reaction, determined over the temperature range 1500–2150 °K, is 1013.44±0.10 exp −(17 400 ± 1 300 cal mol−1)/RT cm3 mol−1 s−1.It is pointed out that, under certain stated conditions, the method can also be extended to study the rates of elementary reactions involving O atoms and OH radicals. From our experiments, upper limits on the rate coefficients of the reactions OH + NH3 → H2O + NH2 and O + NH3 → OH + NH2 over the temperature range 1620–1920 °K are 8 × 109T0.08 exp (−1100/RT) and 1 × 1013 exp (−6600/RT), respectively.

Only L-valine among branched-chain amino acids is effective in promoting the growth of the small intestinal mucosa

2001 ◽  
Vol 120 (5) ◽  
pp. A676-A676
Author(s):  
T TAKAHASHI ◽  
H DOI ◽  
H KOMATSU ◽  
K SATO ◽  
O UEDA ◽  
...  
Keyword(s):  
Amino Acids ◽  
Intestinal Mucosa ◽  
Branched Chain Amino Acids ◽  
Small Intestinal Mucosa ◽  
Small Intestinal ◽  
Branched Chain

The Weight Loss Effects of Branched Chain Amino Acids and Vitamin B6: A Randomized Controlled Trial on Obese and Overweight Women

2018 ◽  
Vol 88 (1-2) ◽  
pp. 80-89 ◽  
Author(s):  
Zahra Shakibay Novin ◽  
Saeed Ghavamzadeh ◽  
Alireza Mehdizadeh
Keyword(s):  
Amino Acids ◽  
Weight Loss ◽  
Body Composition ◽  
Vitamin B6 ◽  
Controlled Trial ◽  
Density Lipoprotein ◽  
Branched Chain Amino Acids ◽  
Model Assessment ◽  
Waist To Hip Ratio ◽  
Branched Chain

Abstract. Branched chain amino acids (BCAA), with vitamin B6 have been reported to improve fat metabolism and muscle synthesis. We hypothesized that supplementation with BCAA and vitamin B6 would result in more weight loss and improve body composition and blood markers related to cardiovascular diseases. Our aim was to determine whether the mentioned supplementation would affect weight loss, body composition, and cardiovascular risk factors during weight loss intervention. To this end, we performed a placebo-controlled randomized clinical trial in 42 overweight and obese women (BMI = 25–34.9 kg/m2). Taking a four-week moderate deficit calorie diet (–500 kcal/day), participants were randomized to receive BCAA (6 g/day) with vitamin B6 (40 mg/day) or placebo. Body composition variables measured with the use of bioelectrical impedance analysis, homeostatic model assessment, and plasma insulin, Low density lipoprotein, High density lipoprotein, Total Cholesterol, Triglyceride, and fasting blood sugar were measured. The result indicated that, weight loss was not significantly affected by BCAA and vitamin B6 supplementation (–2.43 ± 1.02 kg) or placebo (–1.64 ± 1.48 kg). However, significant time × treatment interactions in waist to hip ratio (P = 0.005), left leg lean (P = 0.004) and right leg lean (P = 0.023) were observed. Overall, supplementation with BCAA and vitamin B6 could preserve legs lean and also attenuated waist to hip ratio.

Branched chain amino acids decrease top-down event-related potentials in healthy subjects

2007 ◽  
Vol 40 (05) ◽  
Author(s):  
AH Neuhaus ◽  
TE Goldberg ◽  
Y Hassoun ◽  
JA Bates ◽  
KW Nassauer ◽  
...  
Keyword(s):  
Amino Acids ◽  
Healthy Subjects ◽  
Event Related Potentials ◽  
Branched Chain Amino Acids ◽  
Top Down ◽  
Related Potentials ◽  
Branched Chain

1576-P: Correlation Analysis between Insulin Sensitivity, Branched-Chain Acid, and Adiponectin Levels in Japanese Individuals with Varying Degrees of Glucose Tolerance

Diabetes ◽  
2020 ◽  
Vol 69 (Supplement 1) ◽  
pp. 1576-P
Author(s):  
ERI AMANO ◽  
KUMIKO YOSHIMURA ◽  
SHOGO FUNAKOSHI ◽  
SEIKI HIRANO ◽  
SATOKO OHMI ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Correlation Analysis ◽  
Glucose Tolerance ◽  
Branched Chain

Value of quantitative and qualitative assessment of protein in workers’ diet

2019 ◽  
pp. 97-103
Author(s):  
S. E. Dubenko ◽  
T. V. Mazhaeva ◽  
G. M. Nasybullina
Keyword(s):  
Amino Acids ◽  
Physical Exertion ◽  
Qualitative Evaluation ◽  
Essential Amino Acids ◽  
Qualitative Assessment ◽  
Health State ◽  
Occupational Hazards ◽  
Occupational Groups ◽  
Branched Chain ◽  
Amino Acid Contents

Th e authors reviewed literature on methodic evaluations of human requirements of protein, based on Russian and foreign data bases (Scopus, Web of Science, MedLine, RINTs, eLIBRA RY) via key words in article headings, and evaluated quality and quantity of protein in diets of workers exposed to occupational hazards. Average requirements of amino acids and their additional intake for bett er health state in certain occupational groups remains a topical problem. Th e article covers list of methods for quantitative and qualitative evaluation of proteins in foods and diets. Findings are diff erences in approaches to protein quantity regulation in Russian Federation and WHO/FAO/UNU (protein normal level in RF is higher, depends on physical exertion, with lower quantity of amino acids with branched chain in structure of essential amino acids). Th erapeutic and prophylactic diet corresponding to Order N46 of Russian Health Ministry for main occupations of metallurgic workshops can be considered as high-proteous and balanced in amino acid contents. Necessity is to study adequate intake of amino acids in workers exposed to occupational hazards, for improving protective and adaptative body mechanisms, and prevention of occupational and occupationally conditioned diseases.

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