Effects of Inoculum and Substrate Concentrations in Anaerobic Fermentation of Treated Rice Bran to Acetone, Butanol and Ethanol

2012 ◽  
Vol 2 (4) ◽  
pp. 79-89 ◽  
Author(s):  
Olujimi Dada ◽  
Mohd. Sahaid Kalil ◽  
Wan Mohtar Wan Yusoff
Keyword(s):  
Rice Bran ◽  
Anaerobic Fermentation ◽  
Substrate Concentrations

Comparison of multi-enzyme and thermophilic bacteria on the hydrolysis of mariculture organic waste (MOW)

2016 ◽  
Vol 73 (8) ◽  
pp. 1978-1985
Author(s):  
Liang Guo ◽  
Mei Sun ◽  
Yan Zong ◽  
Yangguo Zhao ◽  
Mengchun Gao ◽  
...  
Keyword(s):  
Organic Waste ◽  
Thermophilic Bacteria ◽  
Anaerobic Fermentation ◽  
Energy Resource ◽  
Oxygen Demand ◽  
Enzyme Hydrolysis ◽  
Hydrolysis Time ◽  
Soluble Chemical Oxygen Demand ◽  
Hydrolysis Of ◽  
Substrate Concentrations

Mariculture organic waste (MOW) is rich in organic matter, which is a potential energy resource for anaerobic digestion. In order to enhance the anaerobic fermentation, the MOW was hydrolyzed by multi-enzyme and thermophilic bacteria. It was advantageous for soluble chemical oxygen demand (SCOD) release at MOW concentrations of 6 and 10 g/L with multi-enzyme and thermophilic bacteria pretreatments. For multi-enzyme, the hydrolysis was not obvious at substrate concentrations of 1 and 3 g/L, and the protein and carbohydrate increased with hydrolysis time at substrate concentrations of 6 and 10 g/L. For thermophilic bacteria, the carbohydrate was first released at 2–4 h and then consumed, and the protein increased with hydrolysis time. The optimal enzyme hydrolysis for MOW was determined by measuring the changes of SCOD, protein, carbohydrate, ammonia and total phosphorus, and comparing with acid and alkaline pretreatments.

The role of rice bran extract on acetyl CoA carboxylase in liver of rats fed a high-fat diet

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
C Charkhonpunya ◽  
S Sireeratawong ◽  
S Komindr ◽  
N Lerdvuthisopon
Keyword(s):  
Rice Bran ◽  
High Fat Diet ◽  
Acetyl Coa Carboxylase ◽  
High Fat ◽  
Acetyl Coa ◽  
Rice Bran Extract

Developing a nutraceutical from Egyptian stabilized rice bran: a pharmacological approach

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
AM Helal ◽  
MT Khayyal ◽  
HM Abd El Aziz ◽  
RM Abdel Salam
Keyword(s):  
Rice Bran ◽  
Pharmacological Approach

The comparative effect of rice bran extract on rats fed a high-fat diet for 4 versus 16 weeks

Planta Medica ◽  
2014 ◽  
Vol 80 (16) ◽  
Author(s):  
N Munkong ◽  
S Sireeratawong ◽  
A Wongnoppavich ◽  
N Lerdvuthisopon
Keyword(s):  
Rice Bran ◽  
High Fat Diet ◽  
High Fat ◽  
Comparative Effect ◽  
Rice Bran Extract

Chromatographic Isolation of the LDH-Isoenzymes of Human Blood Platelets and an Investigation of Their Enzyme Kinetics

1968 ◽  
Vol 20 (03/04) ◽  
pp. 301-313 ◽  
Author(s):  
W Schneider ◽  
K Schumacher ◽  
B Thiede ◽  
R Gross
Keyword(s):  
Human Blood ◽  
Blood Platelets ◽  
Deae Cellulose ◽  
Order Reaction ◽  
Kinetic Properties ◽  
Ldh Isoenzymes ◽  
Kinetic Investigations ◽  
Substrate Concentrations ◽  
Chromatographic Isolation ◽  
Human Blood Platelets

SummaryThe LDH-isoenzymes of human blood platelets show a distinct predominance of the isoenzymes 2 and 3 upon chromatography on DEAE-cellulose. Small amounts of LDH-1 are also present, while only traces of LDH-4 and -5 can be detected.Enzyme kinetic investigations of the principal isoenzymes LDH-1, -2 and -3 clearly show that the differences in inhibition constants with pyruvate as substrate which are demonstrable at 25° largely disappear at 37°. On the other hand, the differences among the isoenzymes in their affinity for pyruvate and lactate as substrate as well as in with respect to the optimal substrate concentrations of pyruvate are more marked at 37° than at 25°. Also, the type of inhibition found with lactate as substrate is increasingly the expression of a higher order reaction in going from LDH-1 to LDH-3. A dependence of the LDH distribution pattern upon the metabolism of the cell is discussed. A comparison of our results with thrombocytes with those of other workers with erythrocytes and leucocytes makes it unlikely that the LDH pattern is directly dependent upon the existence of an oxidative metabolism. Rather, the redox potential of the cell could be of importance for the nature of the pattern of isoenzymes and for their differing kinetic properties.

THE INFLUENCE OF ETHANOL ON THE CONVERSION OF PREGNENOLONE TO PROGESTERONE BY HUMAN PLACENTAL MICROSOMES

1974 ◽  
Vol 76 (1) ◽  
pp. 178-188 ◽  
Author(s):  
H. Lübbert ◽  
K. Pollow ◽  
R. Wagner ◽  
J. Hammerstein
Keyword(s):  
Kinetic Parameters ◽  
Enzyme Preparation ◽  
Ethanol Concentration ◽  
Hydroxysteroid Dehydrogenase ◽  
Product Formation ◽  
Linear Increase ◽  
Maximal Velocity ◽  
Microsomal Enzyme ◽  
Temperature Optima ◽  
Substrate Concentrations

ABSTRACT The effects of ethanol on kinetic parameters of placental Δ5-3β-hydroxysteroid dehydrogenase were studied. In the presence of high pregnenolone concentrations (50 μm, [S] > Km) the microsomal enzyme preparation exhibited an almost linear increase in activity as the ethanol concentration in the medium was raised from 2.5 to 15 % (v/v). At lower substrate concentrations ([S] << Km) ethanol caused inhibition. Other effects of ethanol were: linearity of product formation with time was prolonged; the maximal velocity was markedly increased; the Km for pregnenolone slightly decreased with increasing ethanol concentrations (2.5 to 10 %, v/v) whereas the Km for NAD remained the same. The pH and temperature optima of the reaction were unaffected by ethanol. Other organic solvents caused similar effects.

Effective investigation of rice bran extracts to activities of probiotics bacteria

2014 ◽  
Vol 35 (3se) ◽  
Author(s):  
Hoang Van Tuan ◽  
Pham Huong Son ◽  
Nguyen Thi Hien ◽  
Nguyen Thi Lai
Keyword(s):  
Rice Bran
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