首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 62 毫秒
1.
1稀土简介稀土元素(RareEarth)简称稀土(RE或R),大部分位于元素周期表的第六周期,共有17种元素,包括15种镧系元素,即镧(La)、铈(Ce)、镨(Pr)、钕(Nd)、钷(Pm)、钐(Sm)、铕(Eu)、钆(Gd)、铽(Tb)、镝(Dy)、钬(Ho)、铒(Er)、铥(Tm)、镱(Yb)、镥(Lu),和2个第三副族元素钪(Sc)和钇(Y)元素。  相似文献   

2.
The study of rumen microflora on in vitro NDF digestibility (NDFD) of various sheep forages was conducted. Selected NDF substrates were made from 9 forages (meadow grass hay (MGH), erect milkvetch hay (EMH), alfalfa hay (AH), chinese wildrye hay (CWH), dahuria wildryegrass hay (DWH), corn stalk (CS), sudan grass hay (SGH), millet straw (MS) and corn stover silage(CSS). All these substrates were incubated for 24 h with rumen inoculum. NDFD ranked from greatest to least in the following order: DWH (30.19) 〉 CWH (25.99)〉 MGH (25.80) 〉MS (22.79) 〉 CSS (19.75) 〉AH (19.68) 〉 CS (18.23) 〉 EMH (14.73) 〉 SGH (8.75), the figures in parentheses were NDFD, %NDF.  相似文献   

3.
李健  钟婧  张虹  刘文萍  李华 《野生动物》2011,32(1):52-54
本研究对重庆自然博物馆馆藏的爬行动物标本进行清点、整理,得到自然博物馆馆藏国内爬行动物标本164种,分属于壁虎科(Gekkonidae)7属,鬣蜥科(Agamidae)6属,巨蜥科(Varanidae)1属,蜥蜴科(Lacertidae)4属,石龙子科(Scincidae)3属,盲蛇科(Typhlopidae)1属,蟒科(Boidae)2属,游蛇科(Megapodiidae)25属,眼镜蛇科(Elapidae)6属,蝰科(Viperidae)7属,鳖科(Trionychidae)2属,海龟科(Cheloniidae)1属,平胸龟科(Platysternidae)1属,乌龟科(Emydidae)2属,陆龟科(Tesrudinidae)2属,鳄科(Crocodylidae)1属,以及3个国外物种粗颈龟(Siebenrockiella crassicollis)、咸水泥彩龟(Callagur borneoensis)和蛇鳄龟(Macroclemystemminckii。)  相似文献   

4.
在80年代鸡的常见传染病仅仅见有新城疫(ND)、马立克氏病(MD)、鸡痘(FP)、禽霍乱(FC)和鸡白痢(PD),而现代除上述疫病外还出现了传染性法氏囊病(IBD)、传染性支气管炎(IB)、鸡减蛋综合症(EDS-76)、传染性脑脊髓炎(AC)、病毒性关节炎(AVA)、鸡传染性鼻炎(IC)、鸡大肠肝菌病(AC)、鸡慢性呼吸道病(CRD)以及葡萄球菌病(SC),  相似文献   

5.
北京南海子麋鹿苑麋鹿食性分析   总被引:3,自引:0,他引:3  
王轶  王文 《野生动物》2011,32(2):65-68
2010年1~12月,在北京南海子麋鹿苑用粪便显微组织技术分析麋鹿食性。将收集的240组粪样8个复合样本和11科19种(属)植物标本进行镜检分析,结果如下:春季,麋鹿主要采食紫花苜蓿(4.03%)、狗尾草(11.87%)、野苋菜(9.51%)、黑麦草(8.13%);夏季,紫花苜蓿(27.61%)、狗尾草(15.45%)、禾本类其他植物(11.82%)、野苋菜(8.07%);秋季,紫花苜蓿(22.57%)、蒿(12.55%)、狗尾草(11.26%)、黑麦草(11.17%);冬季,紫花苜蓿(17.16%)、狗尾草(14.48%)、蒿(13.63%)、野苋菜(13.19%)。  相似文献   

6.
李永峰  李锋 《中国饲料》2023,1(8):50-53
文章旨在研究复合益生菌对断奶仔猪生长性能、血清生化及养分消化率的影响。试验选择45头同批次,且初始体重[(9.73±0.42)kg]无显著差异的断奶仔猪,将其随机分为3组,每组3个重复,每个重复5头。其中,对照组饲喂常规饲料(空白),试验1、2组分别在常规饲料的基础上添加0.1%、0.2%的复合益生菌,试验为期28?d。结果:(1)试验1组(0.1%复合益生菌)和试验2组(0.2%复合益生菌)断奶仔猪平均日增重(ADG)显著高于对照组(空白)(P <0.05),且试验2组(0.2%复合益生菌)断奶仔猪平均日增重(ADG)显著高于试验1组(0.1%复合益生菌)(P <0.05);试验2组(0.2%复合益生菌)断奶仔猪平均日采食量(ADFI)显著高于对照组(空白)(P <0.05);(2)试验1组(0.1%复合益生菌)和试验2组(0.2%复合益生菌)断奶仔猪血清中总蛋白(TP)、白蛋白(ALB)含量显著高于对照组(空白)(P <0.05);(3)试验1组(0.1%复合益生菌)和试验2组(0.2%复合益生菌)粗蛋白质(CP)消化率显著高于对照组(空白)(P <0...  相似文献   

7.
为研究巴克夏(B)、皮特兰(P)、太湖猪(T)和黔东花猪(H)组合(BPTH)及巴克夏(B)、杜洛克(D)、太湖猪(T)和黔东花猪(H)组合(BDTH)商品猪胴体和肉质性状,试验对其屠宰性能和肉质性状进行了测定。结果表明,2种组合瘦肉率分别为(55.72±2.260)%和(50.913±2.026)%;平均背膘厚分别为(3.448±0.433)mm和(3.717±0.525)mm;眼肌面积为(53.557±14.377)cm2和(46.796±5.199)cm2;大理石纹均为3.5±0;滴水损失分别为(1.933±0.873)%和(7.667±3.216)%;剪切力分别为(0.616±0.444)kg和(1.12±0.655)kg。综合测定结果说明,BPTH表现出相对优越的胴体品质和肉质性状,是一种较为优质的黑猪杂交组合模式。  相似文献   

8.
从山西省沁县一家蛋鸭养殖场内的病死鸭体内采集病料,通过涂片镜检、细菌培养、生化实验、动物回归试验、血清型鉴定,确诊为鸭大肠杆菌病。对该病原菌进行药敏试验筛选敏感药物,结果显示:该致病性大肠杆菌对头孢噻肟(CTX)、头孢曲松钠(CFX)、庆大霉素(GM),和头孢拉啶(CED)极度敏感,对氟苯尼考(FF)高度敏感,对阿莫西林(AMX)、氨苄西林(SU)、卡那霉素(K)、泰乐菌素(TL)、硫红霉素(E)、利福平(RA)、氧氟沙星(OFL)、诺氟沙星(NOR)、环丙沙星(CIP)、恩诺沙星(ENR)耐药。结论:交替使用头孢噻肟、头孢曲松钠、庆大霉素、头孢拉啶和氟苯尼考对该病进行治疗,临床效果显著。  相似文献   

9.
选取9月龄欧拉型藏系绵羊羯羊(30.21 kg±1.42 kg)40只,随机分为4组,A组冷季放牧,B、C和D组冷季牧归每天每只分别补饲0.10、0.20和0.30 kg混合精料,试验期210 d,研究冷季牧归补饲精料对其血清生化指标的影响。结果表明,补饲精料提高了欧拉型藏系绵羊血清总蛋白(TP)、白蛋白(ALB)、球蛋白(GLB)、钙(Ca)的含量,钙/无机磷(Ca/IP)比值及肌酸激酶(CK)、乳酸脱氢酶(LDH)、谷草转氨酶(AST)、谷丙转氨酶(ALT)和γ-谷氨酰胺基转移酶(GGT)活性;随着精料补饲量增大,绵羊血清葡萄糖(GLU)、胆固醇(CHO)和甘油三酯(TG)含量,超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性,生长激素(GH)、胰岛素样生长因子-1(IGF-1)、缩胆囊素(CCK)、胃泌素及免疫球蛋白A(IgA)、免疫球蛋白G(IgG)及免疫球蛋白M(IgM)的浓度增大,但补饲0.30 kg组试验羊IgG浓度较C组略有下降(P>0.05);与A组相比,补饲精料显著提高了试验羊碱性磷酸酶(AMP)活性、尿素氮(BUN)浓度和BUN/CRE的值,显著降低肌酐(CRE)和尿酸(UA)浓度(P<0.05)。综合上述结果,冷季归牧后补饲适量精料可改善欧拉型藏系绵羊能量和脂肪的代谢能力,增强肝脏蛋白合成,提高机体免疫力和抗氧化力,调节钙磷代谢。  相似文献   

10.
为调查奎屯地区奶牛球虫感染与流行现状,试验选取奎屯不同地区的5个规模化奶牛养殖场,对2~3月龄、6月龄、1~2岁、5~6岁的牛直肠采集粪便共290份进行球虫检测。结果发现被检5个规模化奶牛场均存在球虫感染,感染率最高为58.14%;共检出8种艾美耳属球虫,分别是牛艾美耳球虫(Eimeriabovis)(8.62%)、邱氏艾美耳球虫(Eimeriazuernii)(9.31%)、椭圆艾美耳球虫(Eimeria ellipsoidalli)(11.03%)、柱状艾美耳球虫(Eimeria cylindrce)(5.86%)、阿拉巴艾美耳球虫(Eimeria alabamensis)(4.13%)、亚球艾美耳球虫(Eimeria subspherica)(9.31%)、奥博艾美耳球虫(Eimeria auburnensis)(5.17%)、加拿大艾美耳球虫(Eimeria canadensis)(3.44%),且优势虫种为椭圆艾美耳球虫(Eimeria ellipsoidalli)、邱氏艾美耳球虫(Eimeria zuernii)、亚球艾美耳球虫(Eimeriasubspherica)、牛艾美耳球虫(Eimeriabovis)。  相似文献   

11.
采用高效液相色谱法测定癸氧喹酯干混悬剂的含量,在2-250μg/mL范围内,峰面积的常用对数与进样量浓度的常用对数呈良好的线性关系,R^2=1(n=5),平均回收率为99.24%~99.51%,RSD在0.05%~0.28%。此方法分析时间短,样品前处理简便、定量结果准确,重现性好,结果满意,为其质量控制提供了依据。  相似文献   

12.
13.
本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。  相似文献   

14.
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。  相似文献   

15.
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo.  相似文献   

16.
乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制.  相似文献   

17.
家兔作为一种实验动物 ,推动了繁殖技术的发展。本试验通过对不同年龄公獭兔的睾丸进行组织学观察、测定 ,研究精子的发生规律 ,为系统地进行繁殖生理工作提供依据。1 材料与方法选 60日龄、75日龄、90日龄 3个年龄公獭兔各5只 ,用外科手术法摘取两侧睾丸 ,放入 Bouin氏液中固定 ,二甲苯透明 ,石蜡包埋 ,切成 5~ 8μm切片 ,H.E.染色。在显微镜下观察 ,并进行定量组织学指标测定及差异性比较。2 结果和讨论2 .1 睾丸定量组织学指标的测定结果 见表 1。表 1 獭兔睾丸定量组织学指标   μm,个 /精细管60日龄 75日龄 90日龄曲细精管…  相似文献   

18.
为贯彻落实《兽药生产质量管理规范》(简称《兽药GMP》),进一步推动兽药GMP实施进程,我部制定了《兽药生产质量管理规范检查验收办法》,现予公告。本公告自2003年6月1日起施行。附件:兽药生产质量管理规范检查验收办法二○○三年四月十日第一章 总则 第一条 为推动《兽药生产质量管理规范》(以下简称兽药GMP)的实施,规范兽药GMP检查验收工作,制定本办法。 第二条 农业部负责全国兽药GMP管理和检查验收工作;负责制修订兽药GMP检查验收管理规定;负责兽药GMP检查员队伍建设和监督管理工作,负责国际兽药贸易中GMP互认工作。 …  相似文献   

19.
以国际标准强毒R株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离MG,并收集感染鸡所产蛋分离MG。结果表明,人工感染48小时后上、下呼吸道及肺已被全面感染,96小时气囊已被感染,120小时输卵管已能分离到MG,卵巢始终分离不到MG。人工感染鸡自144小时便能在其所产蛋中分离出MG。药物治疗能在72小时内消除感染,油乳剂苗则需24天后逐渐降低蛋内MG分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内MG,但以研制的种蛋浸泡剂药浴效果为最好。  相似文献   

20.
REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号