搜索结果: 181-195 共查到“知识库 生物化学”相关记录3417条 . 查询时间(1.546 秒)
为研究蓖麻油聚乙二醇单酯葡萄糖苷(Castor oil polyethylene glycol monoester glucoside,CPMG)在细菌灭活疫苗浸泡免疫中的佐剂作用,将CPMG和嗜水气单胞菌灭活疫苗联合施用,二次浸泡免疫异育银鲫后饲养在室内玻璃缸中,用实时荧光定量PCR检测加强免疫后2 d、4 d、7 d、11 d、14 d和21 d脾脏中IgM、IL-1β、C3、C-凝集素和溶菌...
本试验研究了饲料中添加氧化鱼油对黄颡鱼(Pelteobagrus fulvidraco)幼鱼肠道免疫、抗氧化和其它功能指标、组织结构的影响及添加精氨酸对其的干预作用。[方法]采用新鲜鱼油(FF):氧化鱼油(OF)按照(w/w)2.5:0、1.5:1.0和0.5:2.0配制3种饲料(FF,OF1,OF2),在此基础上分别添加0.48%精氨酸(Arg)盐酸盐配制3种精氨酸饲料(FFA,OFA1,OFA...
The effects of dietary protein intake on appendicular lean mass and muscle function in elderly men: a 10-wk randomized controlled trial
nutrient requirements dietary protein skeletal muscle older adults whole foods
2018/11/21
Background: The Recommended Daily Allowance (RDA) for protein intake in the adult population is widely promoted as 0.8 g · kg−1 · d−1. Aging may increase protein requirements, particularly...
Serum ferritin as an indicator of iron status: what do we need to know?
iron status iron deficiency ferritin iron deficiency anemia cutoffs hepcidin diagnostic test
2018/11/21
Determination of iron status in pregnancy and in young children is essential for both clinical and public health practice. Clinical diagnosis of iron deficiency (ID) through sampling of bone marrow to...
Laboratory methodologies for indicators of iron status: strengths, limitations, and analytical challenges
iron analysis ferritin soluble transferrin receptor total body iron NHANES iron methodologies
2018/11/21
Biochemical assessment of iron status relies on serum-based indicators, such as serum ferritin (SF), transferrin saturation, and soluble transferrin receptor (sTfR), as well as erythrocyte protoporphy...
Consumption of whole eggs promotes greater stimulation of postexercise muscle protein synthesis than consumption of isonitrogenous amounts of egg whites in young men
protein digestion food protein quality leucine amino acid transporters anabolic signaling exercise
2018/11/21
Background: Protein in the diet is commonly ingested from whole foods that contain various macro- and micronutrients. However, the effect of consuming protein within its natural whole-food matrix on p...
水稻土中砷的氧化还原和甲基化等生物化学过程是影响水稻砷毒性的主要作用机制；同时，水淹厌氧条件是驱动水稻土中砷的生物化学过程关键环节，且是导致水稻对砷大量吸收累积的主要原因，对以水稻为主食的人们造成健康威胁。本文综述了水稻土中砷的氧化还原和甲基化现象、砷的生物化学作用机制以及影响水稻土砷迁移转化的关键因素，并探讨了水淹厌氧条件对水稻土砷代谢微生物群落、微生物基因表达水平以及对砷归趋的影响。最后，展望...
同型半胱氨酸及其代谢酶基因多态性与冠心病的关系
冠心病 同型半胱氨酸 基因多态性
2018/9/19
探讨血浆同型半胱氨酸(Ｈｃｙ) 水平及其代谢酶 ＭＴＨＦＲ Ｃ６７７Ｔ、ＭＴＨＦＲ Ａ１２９８Ｃ、ＭＳ Ａ２７５６Ｇ、
ＭＴＲＲ Ａ６６Ｇ 基因多态性与冠心病的相关性ꎮ 方法 在川东北地区汉族人群中 ２２１ 例冠心病患者(冠心病组)和与
之性别、年龄匹配的 ２１０ 例非冠心病患者(对照组)为研究对象ꎮ 采用 Ｈｃｙ 检测试剂盒(速率法)测定两组患者血
浆 Ｈｃｙ ...
Quantity and source of dietary protein influence metabolite production by gut microbiota and rectal mucosa gene expression: a randomized, parallel, double-blind trial in overweight humans
dietary protein protein source high-protein diet gut microbiota
2018/11/19
Background: Although high-protein diets (HPDs) are frequently consumed for body-weight control, little is known about the consequences for gut microbiota composition and metabolic activity and for lar...
In the elderly, meat protein assimilation from rare meat is lower than that from meat that is well done
protein metabolism amino acid bioavailability meat cooking elderly
2018/11/20
Background: Meat cooking conditions in in vitro and in vivo models have been shown to influence the rate of protein digestion, which is known to affect postprandial protein metabolism in the elderly.
Within-day protein distribution does not influence body composition responses during weight loss in resistance-training adults who are overweight
exercise weight loss muscle mass heart health protein patterning
2018/11/20
Background: Emerging research suggests that redistributing total protein intake from 1 high-protein meal/d to multiple moderately high-protein meals improves 24-h muscle protein synthesis. Over time, ...
生物法拆分外消旋甲霜灵制备R-甲霜灵
生物催化 生物过程 水解 R,S-甲霜灵 R-甲霜灵 菌种筛选和鉴定 酯酶 Albibacters
2017/11/24
从土壤和污泥样品中分离得到一株能不对称水解甲霜灵的革兰阴性菌。通过分子生物学鉴定，命名该菌株为Albibacters sp.zjut528。当底物浓度为50 g·L-1，湿菌体（含水量81%）：底物=0.3：1（质量比），反应28 h，产物得率为47.1%，主产物为R-甲霜灵酸，对映体过量值eep > 99.9%。将菌株细胞破碎得到的粗酶液分离纯化得到一个SDS-PAGE电泳纯的酯酶，分子量约为4...
Effects of protein supplementation combined with resistance exercise on body composition and physical function in older adults: a systematic review and meta-analysis
elderly people obesity protein supplementation resistance exercise body composition
2018/11/16
Background: Overweight and obese older people face a high risk of muscle loss and impaired physical function, which may contribute to sarcopenic obesity. Resistance exercise training (RET) has a benef...
Effects of protein supplementation combined with resistance exercise on body composition and physical function in older adults: a systematic review and meta-analysis
elderly people obesity protein supplementation resistance exercise body composition
2018/11/20
Background: Overweight and obese older people face a high risk of muscle loss and impaired physical function, which may contribute to sarcopenic obesity. Resistance exercise training (RET) has a benef...
Consumption of protein beverages as a strategy to promote increased energy intake in older adults
Consumption of protein beverages older adults Consumption
2018/11/19
The United States is experiencing a demographic shift, with an estimated doubling of adults aged ≥65 y by 2050, creating a need to target nutrition strategies to promote health as we get older (1).