家蚕消化液对几种外源性酶活性的影响

通过体外试验和经口添食试验表明,家蚕消化液对纤维素酶和果胶酶具有明显的 抑制作用.分析认为,这是由于消化液的强碱性或消化液中存在的蛋白酶的分解作用 所致.因此,利用外源性消化酶的可能途径是先经酶促反应,将大量纤维素或果胶等 转变成可吸收利用的还原糖形态,然后进行给饵.     

细粒棘球绦虫原头节及囊壁的蛋白质,糖,脂及酯酶同工酶分析

本试验应用聚丙烯酰胺凝胶等电聚焦电泳时对细粒棘球绦虫原头节及囊壁可溶性粗提物的蛋白质，糖，脂及酯酶同工酶进行了初步分析。结果表明，用考马斯亮兰Ｒ－２５０染蛋白分别显示１８及１７条带，用ＰＡＳ试剂染糖分别显示４及８条带；用Ｎｉｌｅｓ兰染脂分别显示４及带；用坚固兰染酯酶同工酶，分别显示５及１０条带。两者的蛋白组成包括酸性糖蛋白，酸性脂蛋白，酸性糖脂蛋白及单纯蛋白。多糖均为酸性。     

PHYSIOLOGY OF THE RESPIRATORY SYSTEM, SIGNIFICANT SPECIES DIFFERENCES, MEASUREMENTS OF PULMONARY FUNCTION, NORMAL VALUES AND SIGNIFICANCE OF VARIATIONS FROM NORMAL

The respiratory system of animals can be divided for evaluation into pulmonary system and circulatory system. The pulmonary system is involved in external respiration whereas the circulatory system is involved in internal respiration. External respiration is the exchange of oxygen (O₂) and carbon dioxide (CO₂) between the environment and circulating blood by way of the lungs and internal respiration is the transport of O₂ and CO₂ between the lungs and the metabolic machinery of the body cells.     

COMPUTED TOMOGRAPHY OF THE LUNG OF HEALTHY SNAKES OF THE SPECIES PYTHON REGIUS, BOA CONSTRICTOR, PYTHON RETICULATUS, MORELIA VIRIDIS, EPICRATES CENCHRIA, AND MORELIA SPILOTA

Thirty-nine healthy boid snakes representing six different species ( Python regius, Boa constrictor, Python reticulatus, Morelia viridis, Epicrates cenchria , and Morelia spilota ) were examined using computed tomography (CT) to characterize the normal appearance of the respiratory tissue. Assessment was done subjectively and densitometry was performed using a defined protocol. The length of the right lung was calculated to be 11.1% of the body length, without a significant difference between species. The length of the left lung in proportion to the right was dependent on the species examined. The most developed left lung was in P. regius (81.2%), whereas in B. constrictor , the left lung was vestigial or absent (24.7%). A median attenuation of −814.6 HU and a variability of 45.9 HU were calculated for all species with no significant difference between species. Within the species, a significantly higher attenuation was found for P. regius in the dorsal and cranial aspect of the lung compared with the ventral and caudal part. In B. constrictor , the reduced left lung was significantly hyperattenuating compared with the right lung. Results of this study emphasize the value of CT and provide basic reference data for assessment of the snake lung in these species.     

女贞子、五味子、四君子汤、大豆黄酮和黄霉素对蛋鸡脂质稳定性的影响

试验选用51周龄海兰褐蛋鸡144只,随机分为6个处理组,试验1、2和3组分别添加1%的女贞子、五味子和四君子汤,试验4组添加10mg/kg的大豆黄酮,试验5组添加5mg/kg黄霉素,试验6组为对照组。研究中草药及大豆黄酮对蛋鸡脂质稳定性的影响及其机理,同时比较中草药、大豆黄酮和黄霉素的效果。设预试期1周,正试期为6周。结果表明:1)添加3种中草药和大豆黄酮均有降低蛋鸡组织、血清或蛋黄中脂质过氧化物含量的作用,其中3种中草药的作用明显优于大豆黄酮和黄霉素(P<0.05),黄霉素的作用不明显;2)中草药、大豆黄酮和黄霉素对超氧化物歧化酶活性没有显著提高(P>0.05),但能显著提高谷胱甘肽还原酶活性(P<0.05);3)3种中草药和大豆黄酮均可显著提高蛋鸡组织或血清中谷胱甘肽含量(P<0.05)。结论为:3种中草药和大豆黄酮均有增强蛋鸡抗氧化水平和脂质稳定性的作用;3种中草药的抗氧化作用优于大豆黄酮;黄霉素对蛋鸡的抗氧化机能没有影响。     

毛泽东邓小平江泽民胡锦涛现代化建设发展观比较研究

论述比较了我国社会主义现代化建设几代中央主要领导人的发展观,它们分别是毛泽东的落后就要挨打、邓小平的发展是硬道理、江泽民的发展是党执政兴国的第一要务、胡锦涛的科学发展观,指出它们是一脉相承的关系,是继承和发展的关系.     

铁与维生素A及其互作效应对肉仔鸡的生产性能、铁、铜、锰、锌表观存留率的影响

选用1日龄艾维茵肉仔鸡504只 ,随机分为9组 ,每组4个重复 ,每重复14只鸡 ,公母比为1 :1 ,采用3×3(Fe×VA)完全随机试验设计 ,研究了日粮中不同水平的Fe和VA对肉仔鸡不同生长阶段 (0～4周龄和5～7周龄 )的生产性能与铁、铜、锰、锌表观存留率的影响。日粮铁的添加量分别为0 ,30 ,60mg/kg ,VA的添加量分别为750,1500,2700IU/kg。结果表明 :①常规日粮中添加铁对肉仔鸡的生产性能影响不显著 (P>0.05) ,添加VA对前后期体增重及日采食量影响均不显著 (P>0.05) ,但对料重比影响接近显著 (P≈0.05) ,Fe和VA交互作用对体增重影响显著 (P<0.05)。②日粮不同铁水平对前后期铁表观存留率的影响显著 (P<0.01) ,随着日粮铁水平的增加 ,铁的表观存留率下降 ;对前后期铜表观存留率的影响均不显著(P>0.05) ;对前后期锰表观存留率的影响显著 (P<0.01) ,随着日粮铁水平的增加 ,锰的表观存留率下降 ;对前期锌表观存留率的影响均不显著(P<0.05) ;对后期锌表观存留率的影响均显著 (P<0.01)。③日粮不同VA水平对前后期铁表观存留率的影响显著 ,随着日粮VA水平的增加 ,铁的表观存留率上升 (P<0.05) ;对前后期铜表观存留率的影响均不显著(P>0.05) ;日粮VA水平对前后期锰表观存留率的影响均显著(P<0.01) ,前期VA(1500IU/kg)组锰