检索结果-南通市图书馆

Nutritional strategies to alleviate oxidative stress in sows

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2022年第2期9卷 60-73页

作者： Qihui Li Siwang Yang Fang Chen Wutai Guan shihai zhang Guangdong Province Key Laboratory of Animal Nutrition Control College of Animal ScienceSouth China Agricultural UniversityGuangzhou 510642China College of Animal Science and National Engineering Research Center for Breeding Swine Industry South China Agricultural UniversityGuangzhou 510642China Guangdong Laboratory for Lingnan Modern Agriculture South China Agricultural UniversityGuangzhou 510642China

The performance of high-yielding sows is directly related to the productivity of pig farming. Fetaldevelopment mainly occurs during the last month of pregnancy, and the aggressive metabolic burden ofsows during this stage eventually leads to systemic oxidative stress. When affected by oxidative stress,sows exhibit adverse symptoms such as reduced feed intake, hindered fetal development, and evenabortion. In addition, milk synthesis during the lactation period causes a severe metabolic burden. Thebiological response to oxidative stress during this period is associated with a decrease in milk production,which further affects the growth of piglets. Understanding the nutritional strategies to alleviateoxidative stress in sows is crucial to maintain their reproduction and lactation performance. Recently,advances have been made in the field of nutrition to relieve oxidative stress in sows during late pregnancyand lactation. This review highlights the nutritional strategies to relieve oxidative stress in sowsreported within the last 20 years.

关键词： Sow Oxidative stress Nutritional strategy Plant extract Selenium Vitamin E

Novel metabolic and physiological functions of branched chain amino acids: a review

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2017年第3期8卷 501-512页

作者： shihai zhang Xiangfang Zeng Man Ren Xiangbing Mao Shiyan Qiao State Key Laboratory of Animal Nutrition College of Animal Science and Technology China Agricultural University College of Animal Science South China Agricultural University College of Animal Science Anhui Science & Technology University Animal Nutrition Institute Key Laboratory of Animal Disease-Resistance NutritionMinistry of Education Sichuan Agricultural University

It is widely known that branched chain amino acids（BCAA） are not only elementary components for building muscle tissue but also participate in increasing protein synthesis in animals and humans. BCAA（isoleucine, leucine and valine） regulate many key signaling pathways, the most classic of which is the activation of the m TOR signaling pathway. This signaling pathway connects many diverse physiological and metabolic roles. Recent years have witnessed many striking developments in determining the novel functions of BCAA including：（1） Insufficient or excessive levels of BCAA in the diet enhances lipolysis.（2） BCAA, especially isoleucine, play a major role in enhancing glucose consumption and utilization by up-regulating intestinal and muscular glucose transporters.（3）Supplementation of leucine in the diet enhances meat quality in finishing pigs.（4） BCAA are beneficial for mammary health, milk quality and embryo growth.（5） BCAA enhance intestinal development, intestinal amino acid transportation and mucin production.（6） BCAA participate in up-regulating innate and adaptive immune *** addition, abnormally elevated BCAA levels in the blood（decreased BCAA catabolism） are a good biomarker for the early detection of obesity, diabetes and other metabolic diseases. This review will provide some insights into these novel metabolic and physiological functions of BCAA.

关键词： Amino acid transporters Glucose transporters Gut health Immunity Lipolysis Mammary health Meat quality Milk production

Impacts of energy feeds and supplemental protease on growth performance, nutrient digestibility, and gut health of pigs from 18 to 45 kg body weight

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2017年第4期3卷 359-365页

作者： Hongyu Chen shihai zhang Inkyung Park Sung Woo Kim Department of Animal Science North Carolina State University

A total of 144 pigs with 18.4 ± 2.3 kg initial body weight(BW) at 6 wk of age were used in a 40-d trial to evaluate effects of protease(300,000 U/kg feed, BioResource International Inc., Durham, NC, USA) on growth performance, apparent ileal digestibility(AID) of nutrients, and gut health of pigs fed diets with sorghum. Pigs were randomly allotted to 4 treatments(12 pens per treatment, 3 pigs per pen) in a 2 x 2 factorial arrangement(corn or sorghum basal diets, and 0 or 0.05% protease as 2 factors) with sex and initial BW as blocks. Experimental period had phase 1(d 1 to 21) and phase 2(d 22 to 40). About 65%(phase 1) and 72%(phase 2) of cereal grains were used in corn or sorghum based diets. Both grains were ground to 400 μm. Body weight and feed intake were recorded weekly. On d 35, serum was collected to quantify tumor necrosis factor-a(TNF-a) and malondialdehyde(MDA). Titanium dioxide(0.3%) was added as an indigestible marker for an additional 4 d feeding. On d 40, 32 pigs(8 pigs per treatment)were euthanized to collect digesta from jejunum and ileum(for viscosity and AID), tissues(for morphology) and mucosa samples(for TNF-α and MDA) from duodenum, jejunum, and ileum. Replacing corn with sorghum in the diet increased(P < 0.05) overall average daily gain(from 756 to 787 g/day) and average daily feed intake(from 1,374 to 1,473 g/day), reduced(P < 0.05) overall gain:feed ratio(from0.553 to 0.537), and did not affect AID. Pigs fed diets with sorghum had lower(P < 0.05) MDA content in serum(from 14.61 to 6.48 μmol/L) and jejunum(from 1.42 to 0.91 μmol/g protein), and reduced(P < 0.05) villus height(from 492 to 396 μm) and crypt depth(from 310 to 257 μm) in jejunum. Dietary protease improved(P < 0.05) AID of crude protein(from 81.8% to 86.0%), decreased MDA level(from 1.20 to 0.98 μmol/g protein) in duodenum, and increased(P < 0.05) the ratio of villus height to crypt depth(from 1.08 to 1.21) in duodenum. Overall, use of sorghum fully replacing corn in diets could b

关键词： Growth performance Gut health Pigs Protease Sorghum

Relaxor-like dielectric behavior and its effect on energy storage performance in P(TFE-HFP-VDF) terpolymers

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 150-153页

作者： KeWang Yi Jie Liu Yang Zhou XinPing Hu shihai zhang BaoJin Chu CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China PolyK Technologies LLCState CollegePennsylvania 16801USA

Capacitors are critical components in many advanced electronic and electrical systems,such as pulse power systems,due to their fast charging-discharging speed and high power density[1-4].The ever-increasing demand for compact energy storage devices requires the dielectrics,which are the energy storage materials in capacitors,to have a higher energy density and low dielectric loss[2,3].Furthermore,a stable high-temperature performance is another important parameter to be considered for some applications in which high-temperature conditions are present,such as hybrid vehicles[4-7].

关键词： dielectric energy performance

Recent progress of porcine milk components and mammary gland function

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2019年第1期10卷 12-24页

作者： shihai zhang Fang Chen Yinzhi zhang Yantao Lv Jinghui Heng Tian Min Lilang Li Wutai Guan Guangdong Province Key Laboratory of Animal Nutrition Control College of Animal ScienceSouth China Agricultural University College of Animal Science and National Engineering Research Center for Breeding Swine Industry South China Agricultural University Agro-Biological Gene Research Center Guangdong Academy of Agricultural Sciences

As the only nutritional source for newborn piglets,porcine colostrum and milk contain critical nutritional and immunological components including carbohydrates,lipids,and proteins(immunoglobulins).However,porcine milk composition is more complex than these three ***,scientists identified additional and novel components of sow colostrum and milk,including exosomes,oligosaccharides,and bacteria,which possibly act as biological signals and modulate the intestinal environment and immune status in piglets and later in *** of these nutritional and non-nutritional components in porcine milk will help better understand the nutritional and biological function of porcine colostrum and ***,some important functions of the porcine mammary gland have been reported in recent published *** preliminary studies hypothesized how glucose,amino acids,and fatty acids are transported from maternal blood to the porcine mammary gland for milk ***,we summarized recent reports on sow milk composition and porcine mammary gland function in this review,with particular emphasis on macronutrient transfer and synthesis mechanisms,which might offer a possible approach for regulation of milk synthesis in the future.

关键词： Bioactive components Fat Lactose Mammary gland Porcine milk Protein

Dietary fiber and microbiota interaction regulates sow metabolism and reproductive performance

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2020年第4期6卷 397-403页

作者： Min Tian Jiaming Chen Jiaxin Liu Fang Chen Wutai Guan shihai zhang Guangdong Province Key Laboratory of Animal Nutrition Control College of Animal ScienceSouth China Agricultural UniversityGuangzhou510642China College of Animal Science and National Engineering Research Center for Breeding Swine Industry South China Agricultural UniversityGuangzhou510642China Guangdong Laboratory for Lingnan Modern Agriculture South China Agricultural UniversityGuangzhou516042China

Dietary fiber is a critical nutrient in sow diet and has attracted interest of animal nutritionists for many *** addition to increase sows’satiety,dietary fiber has been found to involve in the regulation of multiple biological functions in the sow *** interaction of dietary fiber and gut microbes can produce bioactive metabolites,which are of great significance to sows’metabolism and reproductive *** article reviewed the interaction between dietary fiber and gut microbes in regulating sows’gut microbial diversity,intestinal immune system,lactation,and production performance,with the aim to provide a new strategy for the use of dietary fiber in sow diets.

关键词： Dietary fiber Gut microbe Reproductive performance Sow

Effects of L-lysine·H2SO4 product on the intestinal morphology and liver pathology using broiler model

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2019年第3期10卷 673-682页

作者： Hongmin Jia Ting He Haitao Yu Xiangfang Zeng shihai zhang Wenfeng Ma Jie zhang Shiyan Qiao Xi Ma State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Guangdong Provincial Key Laboratory of Animal Nutrition Control College of Animal ScienceSouth China Agricultural UniversityGuangzhou 510642China College of Animal Science and Technology Henan University of Science and TechnologyLuoyang 471003HenanChina College of Animal Science and Technology Qingdao Agricultural UniversityQingdao 266109China

Background: Lysine is used widely in livestock production due to the shortage of feed protein ***·H2SO4 contains L-lysine sulphate as well as fermentation co-products which contain other amino acids and ***,there are few articles about L-lysine·H2SO4 product regarding intestinal morphology and liver pathology of broiler *** this article,we focus on the absorption and metabolism of L-lysine·H2SO4 revealed in the variation of intestinal morphology and liver pathology to determine the tolerance of chicks for L-lysine·***: To evaluate the tolerance of broilers for L-lysine·H2SO4,240 one day old broilers were allocated randomly to one of five dietary treatments which included corn-soybean diets containing 0,1%,4%,7% or 10% L-lysine·H2SO4(L-lysine content = 55%).Results: Supplementation of 1% L-lysine·H2SO4 in the diet had no negative ***,4%,7% or 10% Llysine·H2SO4 supplementation produced negative responses on broiler performance,carcass characteristics,blood biochemistry,and particularly on intestinal morphology and liver pathology compared with broilers fed the control ***: Our results show that supplementation with 1% L-lysine·H2SO4 had no negative effects on performance,carcass characteristics,blood biochemistry,intestinal morphology and liver pathology in broilers,but supplementation with 4%,7% or 10% L-lysine·H2SO4 produced a negative response,particularly with respect to intestinal morphology and liver pathology.

关键词： Broilers Intestinal morphology Liver pathology L-lysine·H2SO4

Low crude protein formulation with supplemental amino acids for its impacts on intestinal health and growth performance of growing-finishing pigs

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2024年第4期15卷 1590-1606页

作者： Marcos Elias Duarte Wanpuech Parnsen shihai zhang Marvio L.T.Abreu Sung Woo Kim Department of Animal Science North Carolina State UniversityRaleighNC 27695USA

Background Low crude protein(CP)formulations with supplemental amino acids(AA)are used to enhance intestinal health,reduce costs,minimize environmental impact,and maintain growth performance of ***,extensive reduction of dietary CP can compromise growth performance due to limited synthesis of non-essential AA and limited availability of bioactive compounds from protein supplements even when AA requirements are ***,implementing a low CP formulation can increase the net energy(NE)content in feeds causing excessive fat *** supplementation of functional AA,coupled with low CP formulation could further enhance intestinal health and glucose metabolism,improving nitrogen utilization,and growth *** experiments were conducted to evaluate the effects of low CP formulations with supplemental AA on the intestinal health and growth performance of growing-finishing *** In Exp.1,90 pigs(19.7±1.1 kg,45 barrows and 45 gilts)were assigned to 3 treatments:CON(18.0%CP,supplementing Lys,Met,and Thr),LCP(16.0%CP,supplementing Lys,Met,Thr,Trp,and Val),and LCPT(16.1%CP,LCP+0.05%SID Trp).In Exp.2,72 pigs(34.2±4.2 kg BW)were assigned to 3 treatments:CON(17.7%CP,meeting the requirements of Lys,Met,Thr,and Trp);LCP(15.0%CP,meeting Lys,Thr,Trp,Met,Val,Ile,and Phe);and VLCP(12.8%CP,meeting Lys,Thr,Trp,Met,Val,Ile,Phe,His,and Leu).In Exp.3,72 pigs(54.1±5.9 kg BW)were assigned to 3 treatments and fed experimental diets for 3 phases(grower 2,finishing 1,and finishing 2).Treatments were CON(18.0%,13.8%,12.7%CP for 3 phases;meeting Lys,Met,Thr,and Trp);LCP(13.5%,11.4%,10.4%CP for 3 phases;meeting Lys,Thr,Trp,Met,Val,Ile,and Phe);and LCPG(14.1%,12.8%,11.1%CP for 3 phases;LCP+Glu to match SID Glu with CON).All diets had 2.6 Mcal/kg *** In Exp.1,overall,the growth performance did not differ among *** LCPT increased(P<0.05)Claudin-1 expression in the duodenum and *** LCP and LCPT increased(P<0.05)CAT-1,4F2hc,and B0AT exp

关键词： Amino acids Growing-finishing pigs Growth performance Intestinal health Low crude protein formulation Net energy

Combined yeast culture and organic selenium supplementation during late gestation and lactation improve preweaning piglet performance by enhancing the antioxidant capacity and milk content in nutrient-restricted sows

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2020年第2期6卷 160-167页

作者： shihai zhang Zhihui Wu Jinghui Heng Hanqing Song Min Tian Fang Chen Wutai Guan Guangdong Province Key Laboratory of Animal Nutrition Control College of Animal ScienceSouth China Agricultural UniversityGuangzhou510642China College of Animal Science and National Engineering Research Center for Breeding Swine Industry South China Agricultural UniversityGuangzhou510642China

This study was conducted to investigate the effects of dietary supplementation with yeast culture(YC)and organic selenium(Se)during late gestation and lactation on reproductive performance,milk quality,piglet preweaning performance,antioxidant capacity,and secretion of immunoglobulin in multiparous sows.A total of 160 healthy cross-bred sows(Landrace×Yorkshire,mean parity 4.1±0.3)were randomly assigned to 4 groups as follows:1)high nutrient(HN),3,420 kcal/kg digestible energy(DE)and 18.0%crude protein(CP);2)low nutrient(LN),3,240 kcal/kg DE and 16.0%CP;3)LN+YC,LN diet+10 g/kg YC;4)LN+YC+Se,LN diet+10 g/kg YC+organic Se(1 mg/kg Se).Feeding trials of sows started from d 85 of pregnancy to d 35 of *** with sows in the LN group,sows fed the LN+YC+Se diet had greater litter weaning weight,average litter gain,and milk fat content(14-d and25-d milk)(P<0.05).The content of malonaldehyde(MDA)(colostrum and 14-d milk)was lesser,and the activity of glutathione peroxidase(GSH-Px)(colostrum and 25-d milk)was greater when sows were fed the LN+YC+Se diet,compared with sows fed the LN diet(P<0.05).Supplementation of YC and organic Se in the nutrient-restricted diet improved sows’reproductive performance and pig weaning body weight by enhancing the antioxidant capacity and fat content in milk.

关键词： Yeast culture Organic selenium Reproductive performance Antioxidant status Sow