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A Visual pH Indicator through Purple Cabbage Dye for Freshness Test of venison

Journal of New Media 2021年第3期3卷 109-118页

作者： Kaixin Qi Guiying Wang Yinggang Huang Pengfei Fang College of Engineering&Technology Northeast Forestry UniversityHarbin150040China

A visual pH indicator through purple cabbage dye is selected to test the freshness of *** and cassava starch of an equal weight were used to prepare the film-forming matrix of the *** crystallization of natural purple cabbage dyes with a weight ratio of 5%,10%,20%and 40%were added to the matrix,*** pH color test showed that the natural purple cabbage lyophilized powder with a weight ratio of 40%was the best for the pH indicator,which was used to test the freshness of venison stored at 4℃.The total bacterial count,volatile basic nitrogen(TVB-N)and thiobarbituric acid(TBA)of venison were tested through an *** stored at under 4℃,a significant color change of the indicator from pink to blue-green was shown when the total amount of volatile basic nitrogen(TVB-N)(22.78 mg/100 g)exceeded the critical value(20 mg/100 g).The test result showed that the indicator was very sensitive to pH value and it would help customers identify the freshness of venison.

关键词： Visual pH indicator purple cabbage dye TVB-N TBA venison

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Potential benefits of amino acid supplementation for cervid performance and nutritional ecology,with special focus on lysine and methionine:A review

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Animal Nutrition 2022年第4期11卷 391-401页

作者： Veit Ny Tersia Needham Francisco Ceacero Department of Animal Science and Food Processing Faculty of Tropical AgriSciencesCzech University of Life Sciences PragueCzech Republic Department of Cattle Breeding Institute of Animal SciencePragueCzech Republic Food Research Institute Prague Czech Republic

Deer farming is a thriving industry for venison,velvet antlers,trophy hunting,and other *** and nutrition are important factors for improving production performance,especially dietary protein and amino acids(AAs),as they are the main components of all *** a few studies on AA supplementation(Lys,Met,Arg)have been performed on cervids,which show positive effects on weight gain,ADG,feed-:gain ratio,plasma AAs,carcass weight,dressing percentage,yield of high-quality muscles,storage of internal fat during winter,DM and CP digestibility,plasma protein-and fat-related metabolite concentrations,antler burr perimeter,weight,length and mineralisation,velvet antler yield,rumen volatile fatty acids,and microbiome *** these effects are relevant for supporting the production of cervids products,from venison to velvet or trophy antlers,as well as their general performance and well-being of captive-bred *** current available information suggests that AA supplementation can be especially interesting for animals fed low protein rations,and growing animals,but should be avoided in high rations and during winter,since it may promote the accumulation of internal *** effects on milk production and the concentrations of different hormones involved in the regulation of the antler cycle should be further explored.

关键词： Antler Deer Feed additive Protein Ruminant venison

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