Factors affecting enzyme activity in foods

2004 ◽  
Author(s):  
J Whitaker
Keyword(s):  
Enzyme Activity ◽  
Factors Affecting

scholarly journals Relationship between formation of gametophore buds in the protonema of mosses and increase in ribonuclease activity

2015 ◽  
Vol 44 (3) ◽  
pp. 433-441
Author(s):  
M. Spychała ◽  
J. Schneider ◽  
A. Szeykowska
Keyword(s):  
Enzyme Activity ◽  
Early Phase ◽  
Ribonuclease Activity ◽  
Rnase Activity ◽  
Bud Formation ◽  
Factors Affecting ◽  
Spontaneous Formation

Changes in RNase activity similar to those accompanying cytokinin-induced formation of gametophore buds in mosses (a decrease in the early phase of bud formation and later an increase in enzyme activity) have also been found during spontaneous formation of gametophores in moss ontogenesis. Using various factors affecting the cytokinin-induced process of bud formation a correlation has been found between this process and the increase in RNase activity.

scholarly journals Effects of Continuous Cropping of Dictyophora on Soil Physical and Chemical Properties, Microbial Biomass and Enzyme Activity

2021 ◽  
Vol 8 (7) ◽  
pp. 214-220
Author(s):  
Long Tong ◽  
◽  
Hongyan Li ◽  
Xiaoming Liu ◽  
Bin Li ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Ph Value ◽  
Chemical Properties ◽  
Available Phosphorus ◽  
Continuous Cropping ◽  
Physical And Chemical Properties ◽  
Factors Affecting ◽  
The One ◽  
Physical And Chemical ◽  
And Chemical Properties

The continuous obstacle of Dictyophora indusiata has become the one of the main factors affecting the healthy development of D. indusiata industry. In order to study the effects of continuous cropping of D. indusiata on the soil environment, four treatments were used in this study: no planted (CK), planted for 1 years (1Y), continuous cropping for 2 years (2Y) and continuous cropping for 3 years (3Y), to determined of the yield of D. indusiata, soil physical and chemical properties, microbial content and enzyme activity. The results showed that the yield and soil pH value decreased with the increase of continuous cropping years, and the contents of organic matter, total nitrogen, total phosphorus and total potassium, C/N and C/P also increased with the increase of continuous cropping years. Soil availability decreased with the increase of continuous cropping years, the content of alkaline nitrogen, available phosphorus and available potassium decreased by 12.25%, 28.91% and 24.86% at 3Y compared with 1Y, respectively. The biomass of bacteria, actinomycetes and fungi and the total amount of microorganism in soil increased at 1Y compared with CK, but with the increase of continuous cropping years, the biomass of bacteria and actinomycetes and the total amount of microorganism decreased significantly, while the biomass of fungi increased significantly; the continuous cropping of D. indusiata also decreased the value of bacteria/fungi in soil. The enzyme activities of the soil were higher than those of the unplanted plots, however, the activities of urease, catalase, peroxidase, sucrase, phosphatase and protease decreased with the increase of continuous cropping years. In a word, with the increase of continuous cropping, the acidity of rhizosphere soil increased, the availability of soil nutrients and the activity of soil enzymes decreased, the biomass of soil microorganisms, bacteria and actinomycetes decreased. However, the increase of fungal biomass led to the decline of soil texture.

FAT METABOLISM IN GROWING SWINE: A REVIEW

1987 ◽  
Vol 67 (2) ◽  
pp. 301-318 ◽  
Author(s):  
E. R. FARNWORTH ◽  
J. K. G. KRAMER
Keyword(s):  
Enzyme Activity ◽  
Body Fat ◽  
Growing Pigs ◽  
Lipolytic Enzyme ◽  
Lipogenic Enzyme ◽  
Factors Affecting ◽  
Growing Period ◽  
Fat Stores ◽  
Temporary Decrease ◽  
Total Body

At birth, piglets have little body fat that can be mobilized. The influx of high-fat milk causes a rapid increase in body fat stores and a depression of lipogenic enzyme activity. Conversely, lipolytic enzyme activity increases after birth. Changing the fat intake of sucking piglets affects the amount of fat deposition. The length of the sucking period also influences body composition at weaning. Weaning produces a pronounced but temporary decrease in total body lipid, despite an increase in fat synthesis. The effect of weaning on lipolysis is not clear due to a lack of experimental data. During the growing period, fat continues to build up even though lipogenic enzyme activity tends to decline with age. The composition of the diet, the sex of the animal and genetic factors have all been shown to influence the rate of lipogenesis. Fewer reports have been published in which factors affecting lipolysis have been studied and the results are often less conclusive. However, the combined activities of lipogenic and lipolytic processes do not account for the large quantity of body fat found in growing pigs. Key words: Swine, fat, lipogenesis, lipolysis, diet, sex.

Factors Affecting Cryopreservation Efficiency and Enzyme Activity in Northern Pike,Esox lucius, Sperm

1997 ◽  
Vol 7 (4) ◽  
pp. 53-67 ◽  
Author(s):  
J. Glogowski ◽  
I. Babiak ◽  
M. J. Luczynski ◽  
M. Luczynski
Keyword(s):  
Enzyme Activity ◽  
Northern Pike ◽  
Esox Lucius ◽  
Factors Affecting ◽  
Pike Esox Lucius

Factors affecting endo-β-mannanase activity in the endosperms of fenugreek and carob seeds

1996 ◽  
Vol 6 (1) ◽  
pp. 23-29 ◽  
Author(s):  
Fanouris Kontos ◽  
Caroline G. Spyropoulos ◽  
Alison Griffen ◽  
J. Derek Bewley
Keyword(s):  
Enzyme Activity ◽  
Abscisic Acid ◽  
Polyethylene Glycol ◽  
Isoelectric Focusing ◽  
Incubation Medium ◽  
Factors Affecting ◽  
Induced Stress ◽  
Mannanase Activity ◽  
Increased Activity ◽  
Inhibited Enzyme

AbstractEndosperms of fenugreek and carob which have been leached following their isolation exhibit increased activity of endo-β-mannanase, part of which is released into the surrounding incubation medium. This activity was suppressed by the addition to the endosperms of abscisic acid or endosperm/seed coat leachate. The leachate from carob inhibited the increase of endo-β-mannanase activity in fenugreek and that from fenugreek inhibited enzyme activity in carob but more weakly; neither of these leachates inhibited the production of α-amylase in wheat endosperm. Polyethylene glycol-induced stress on non-leached endosperms inhibited endo-β-mannanase production, but not when the stress was applied following endosperm leaching. However, the stress did reduce the amount of enzyme released into the surrounding incubation medium. Several isoenzymes of mannanase could be detected on isoelectric focusing activity gels in the endosperms of both fenugreek and carob, but their pis differed between the two species. When activity was suppressed by ABA or leachate, all pl forms declined equally.

Factors affecting enzyme activity in food processing

2018 ◽  
pp. 337-365 ◽  
Author(s):  
M.G. Scanlon ◽  
A.W. Henrich ◽  
J.R. Whitaker
Keyword(s):  
Enzyme Activity ◽  
Food Processing ◽  
Factors Affecting
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