GRC构件在建筑装饰业的应用

本文系统地阐述了GRC构件的产品性能,施工工艺及方法、特点,展望未来建筑业外装饰的发展趋势。     

鸡源益生菌JM-11菌株的胃肠道耐受及其抗腹泻的研究

本试验从健康的鸡盲肠内容物中筛选出具有较高抑菌活性的病源拮抗菌JM-11菌株,经形态、生理生化及16S rDNA序列鉴定此菌为枯草芽孢杆菌（Bacillus subtilis subsp. subtilis）。经耐受胃肠道环境及胆盐试验,结果表明,JM-11菌株能耐受0.3%的胆盐环境,在pH为3.0的人工胃液中能够很好的存活。利用抗生素打乱雏鸡肠道菌群后,饲喂致病性大肠杆菌来制作腹泻模型。经益生菌JM-11对腹泻雏鸡的治疗试验结果显示,JM-11能显著降低腹泻雏鸡粪便中的大肠杆菌的数量（P<0.01）,增加乳酸菌的数量(P<0.01),提高雏鸡免疫器官指数(P<0.05),对雏鸡具有安全无毒的作用。     

全球鸡蛋消费呈增长趋势

全球范围内鸡蛋消费量持续增长,其中大部分需求量增长来自亚洲的6个国家. 据世界蛋品协会统计分析师Windhorst教授称,截至2015年,世界鸡蛋需求量将比2005年增长1 200万t,从而达到7 090万t(表1).     

贵州天然豆科牧草——窄叶野豌豆的引种与驯化

对采自贵州省册亨县、三都县的窄叶野豌豆野生种进行了引种驯化。结果表明：其产草量中等，鲜草３７．５～４５ｔ／ｈｍ２，草质优良；生育期短，早熟；种子产量高，收纯净种子５００～６００ｋｇ／ｈｍ２。适合在我国南方中亚热带地区同水稻、玉米轮作，也可作为农田填闲作物栽培     

新太湖猪选育过程中近交技术的应用及效应分析

利用新太湖猪选育过程中（１９８６～１９９４）６个世代母猪的分娩产仔记录,后备猪生长发育测定资料,分析了近交对繁殖性能和生长发育性状的影响。相关分析表明,近交与产仔数、产活仔数的相关系数分别为－０．１６２５、－０．１５４６。与１８０日龄活重、体高、胸围、及８０ｋｇ时背膘厚度的相关系数分别为－０．１３５,－０．２１１,－０．２１８,－０．２０４。回归分析表明,近交系数每上升１０％,产仔数下降０．３９头,１８０日龄活重下降１．５ｋｇ,背膘厚下降０．０７４８ｃｍ。产仔记录分析表明,母猪近交系数在２０％以下时,产仔数比非近交组下降０．２７头,差异不显著（Ｐ＞０．０５）;近交系数在２０％以上时,下降１．３５头,差异不显著（Ｐ＞０．０５）。生长发育性状表明,近交系数在３０％以上时,１２０日龄活重、１８０日龄活重等性状都显著下降。８０ｋｇ活体背膘厚当个体近交系数上升到２０％以上时,与非近交组相比下降０．１６ｃｍ,差异显著（Ｐ＜０．０５）。     

乳牛口服大量β-胡萝卜素对维生素A的吸收及钙磷代谢的影响

从北京西郊某农场选取６头健康成年黑白花乳牛,随机分成试验和对照两组。整个试验周期共８周,分为前期,中期和后期。试验结果表明,试验组乳牛血清β－胡萝卜素水平与血清ＡＫＰ活性的变化规律相一致,均于中期时最高,血清ＡＫＰ同工酶酶谱中骨带染色变宽变深;血清维生素Ａ水平呈现逐渐升高趋势;血清钙水平呈下降趋势;血清无机磷水平逐渐下降。据此可以表明,β－胡萝卜素进入机体后,其转化为维生素Ａ的效率在不同的吸收阶段     

Regulation of fibroblast growth factor 9 on the differentiation of goat intramuscular adipocytes

It has been found that fibroblast growth factor receptor (FGF-FGFR) signaling can regulate the expression of adipocyte differentiation genes. FGF9 is one of the members of FGFs that mainly binds receptors FGFR2 and FGFR3. FGF9 is highly expressed in the adipose tissue of humans and mice, but there are few reports on the role of FGF9 in goat intramuscular adipocyte differentiation. Therefore, this study explored the effect of FGF9 on adipocyte differentiation through cell culture, interference, and overexpression. The expression of receptors FGFR1–FGFR4 in adipocyte differentiation and their effects on differentiation were detected to screen receptor gene of FGF9. Finally, the interaction between FGF9 and the receptor was tested by cotransfection. Our results showed that FGF9 interacts with FGFR2 to inhibit goat intramuscular adipocyte differentiation by regulating peroxisome proliferator-activated receptor gamma (PPARγ) and preadipocyte factor 1 (Pref1), which is a data support for subsequent pathway research.     

京华重晚情--庆祝中国饲料工业协会成立20周年大会老饲料工作者活动侧记

深秋的北京,红了枫叶,黄了银杏,这是京华最美的季节,雄伟的北京人民大会堂格外庄严。全国饲料战线广大职工期盼已久的庆祝中国饲料工业协会成立20周年暨第五次全国会员代表大会于2005年11月5日在这里隆重举行。在步入会堂的人流中,有一支队伍格外引人注目:他们人数不多,但行进整齐;他们几乎都是年过六旬的老者,但步履矫健,充满自信;他们的头发大多斑白了,但胸前佩戴的红花映红了绽满欢笑的面容。他们就是受中国饲料工业协会特别邀请,来自全国各省、市和在京的部分离、退休的老饲料工作者,是上个世纪我国饲料工业初创阶段的拓荒者。为了弘扬…     

Chemoattraction and chemorepulsion of Strongyloides stercoralis infective larvae on a sodium chloride gradient is mediated by amphidial neuron pairs ASE and ASH, respectively

Depending on its concentration, sodium chloride acts as either an attractant or a repellant to the infective larvae (L3i) of Strongyloides stercoralis. On a concentration gradient, L3i are attracted to 0.05 M NaCl, but repelled by 2.8M. To test the hypothesis that amphidial neurons ASE and ASH might mediate attraction and repulsion, respectively, these neurons, and control neurons as well, were ablated in hatchling larvae with a laser microbeam. After the larvae attained infectivity (L3i), they were tested on a NaCl gradient. When placed at low salinity, 73.5% of normal controls migrated "up" the gradient, while 26.4% crawled randomly. In contrast, only 20.6% of ASE-ablated L3i migrated "up" the gradient, while 79.4% migrated randomly. Ablation-control ASK-ablated L3i (58.8%) migrated "up" the gradient while 41.1% crawled randomly. When placed at a region of high salinity, 100% of normal control L3i migrated "down" the gradient, whereas 62.5% of ASH-ablated L3i migrated randomly, the remaining 37.5% migrating "down" the gradient. In sharp contrast with ASH-ablated L3i, 94.1% of ablation-control larvae, i.e. ASK-ablated L3i, migrated "down" the gradient. Migration behavior of ASE- and ASH-ablated L3i was significantly different (P < 0.001) from that of ASK-ablated L3i and normal controls. It is noteworthy that 87.5% of ASE-ablated L3i that failed to exhibit chemoattractive behavior were actively chemorepelled from high salinity. Also, 70.0% of ASH-ablated L3i that failed to be chemorepelled from high salinity were capable of chemoattractive behavior, indicating that the worms had retained their behavioral responses except for those associated with the targeted neurons.