秋季中华蜜蜂（Apis cerana cerana）工蜂有分泌活性的舌腺和无分泌活性的舌腺的超微结构比较

对秋季中华蜜蜂工蜂有分泌活性舌腺（９日龄）和无分泌活性的舌腺（采集蜂）的超微结构进行了观察和比较，发现二者的舌腺细胞的超微结构存在着差异。９日龄工蜂舌腺处在分泌活性状态。细胞核发达，多突起；粗面内质网发达，成平行状排列；胞内管、胞外管中都充满电子致密度均匀的物质，即王浆物质；有大量的分泌块；线粒体内嵴排列紧密，呈板层状。而采集蜂舌腺处在无分泌活性状态。核周边异染色质增多；粗面内质网不太发达，多呈泡状；胞内管中物质为一些不均匀的电子致密度大的粗颗粒物质；胞外管中只有少量水样物质；线粒体内嵴间隙相对变大，多发现内嵴间隙呈管泡状。     

犊牛磺胺中毒的病理形态学观察

为了解犊牛磺胺中毒的病理形态学变化特点,对2头因磺胺中毒而死亡的犊牛进行了详细的病理学研究.结果表明,犊牛磺胺中毒的病理性损伤主要发生于肾脏和肝脏.宏观检查可见,肾脏肿胀,色泽变淡,皮质增宽,肾盂有多量豆腐渣样物质.肝脏肿胀,淡橘红色,质地脆易碎.微观检查可见,近曲小管上皮细胞肿胀,核浓缩,染色不良,大量上皮细胞脱落....     

Long-established and emerging pesticide poisoning in horses

Poisoning is a frequent problem in domestic animals. Horses are the third most commonly affected species and pesticides are one of the main causes of toxicosis. Here within are reviewed the most frequent toxicoses where it emerges that the main causes are misuse and accidental exposure. Rodenticides, acetylcholinesterase insecticides followed by herbicides are the main cause of toxicosis and effects of emerging chemicals are being reported. Metaldehyde is still a problem, together with methiocarb. No information has been reported on poisoning with pesticide mixtures.     

河北省天然草地禾本科植物资源与开发利用

对河北省天然草地禾本科植物进行了调查统计。结果表明,共有７３属１６２种上了沉重的饲用植物５０属７７种,优良牧草２９属５０种,主要草坪植物１０余种,具药用等用途的２０余种。根据调查结果,对资源的合理开发利用提出了几点建议。     

热激蛋白在动物应激中的应用

热应激蛋白(HSPs)存在于所有动物细胞中，是动物受到应激原刺激后诱导产生的一组应激蛋白，与机体的应激关系密切，在进化上高度保守。本文在对HSP发现、分类及功能简要介绍的基础上，对HSP70在动物应激中的作用及其调控机制进行了详细的综述，指出HSP将对阐明动物应激机理有重要的意义。     

太湖鹅松果体的组织细胞结构研究

在光镜和电镜水平下对太湖鹅松果体组织结构和细胞结构进行研究，结果表明，鹅松果体主要由松查体细胞组成，其间夹有少数胶质细胞，松果体细胞偶尔排列为滤泡状，松果体细胞具有突起，胞核椭圆形，胞核椭圆形，圆形，线粒体常在胞附近集聚，粗面内质网丰富，高尔基体发达，胞质中有散在的游离核蛋白体，脂滴和溶酶体，胞突中微管方向与胞突平行，胞体中方向不一,质细胞的胞核不规则，胞体和胞突中含有微丝。     

中国伞形科柴胡属果实结构的系统学价值

本文首次深入研究了中国柴胡属29种,5变种及2变形果实的三维结构。结构显示果实结构变化较大,分果表面平滑,横切面近圆形,脊略微突出。中果皮有两种分泌结构,伴生油管及非伴生油管（油管）。前者仅存在于少数物种,且直径小,后者包括不分支及分支油管。不分支油管存在于多数物种的沟（1～5）和结合面（2～7）,油管通常与分果近等长,但亦存在短油管。少数物种的油管呈分支状,在中果皮不规则分布。种皮由1或2层薄壁细胞构成。胚乳在结合面平直或微凹。中果皮无结晶。心皮柄多为2个,在结合面彼此相对。柴胡属果实的多数特征存在于芹亚科其他类群,但分支状油管及2层细胞的种皮仅见于牵环花亚科,变豆菜亚科及芹亚科的基础类群。柴胡属果实的解剖结构支持分子系统学将柴胡属位于芹亚科其他类群的基础位置。     

宁夏柠条资源利用现状及其饲料开发潜力调查--以盐池县为例

对以宁夏盐池县为代表的柠条资源分布、利用状况、存在问题等相关内容进行了全面调查与分析。结果表明:截至2003年,全区柠条资源存林面积已达43.672 4万hm2,占全区总土地面积的8.431%。其中天然林为2.590 5万hm2,人工存林面积累计已达41.081 9万hm2,是全区柠条总面积的94.068%,具有面积大、分布广、幼林化、生物贮量多等特点。主要存在有开发与利用程度低下、资源老化程度严重和过度放牧等问题,并结合当地实际,提出了柠条资源的开发与利用相关对策。     

青海省海南州天然草地主要饲用植物经济类群及评价

海南州天然草地饲用植物资源丰富,据调查统计有饲用植物３６４种,占全州植物总数的３４．５７％,其中禾本科饲用植物９８种,豆科饲用植物４９种,莎草科饲用植物２７种,杂类草饲用植物１０９种,这四大经济类群是构成海南州天然草地的主体,在各草地类型中占居重要的地位,发挥着各自的优势和作用。     

ABDOMINAL RADIOTHERAPY

Physical aspects of external beam abdominal radiotherapy are discussed. Acute, intermediate, and late radiation effects on tissue are reviewed as a basis for determining abdominal organ tolerance to therapeutic radiation. Specific tolerances of critical organs that may be affected by abdominal radiotherapy are itemized, and the manifestations of intolerance are described. Potential application of abdominal radiotherapy to veterinary medicine is proposed. Data available on management of adverse reactions to abdominal radiotherapy are summarized.     

The occurrence of large branchiopod crustaceans in perennial pans: a research note

Pans are isolated, shallow depressions that are endorheic in nature. Because of the natural hydrological functioning of pans, these systems are usually restricted to arid regions and complete desiccation occurs seasonally. In the eastern provinces of South Africa many pans are perennial in nature often remaining inundated for several years. A study of the aquatic invertebrate community structure of selected perennial pans indicated that when these systems undergo complete desiccation, the communities are comparable to the communities of ephemeral ecosystems. During these periods the community displays normal succession patterns with branchiopod crustacean dominating the community structure a few weeks after inundation. These perennial ecosystems are comparable to similar habitats around the world but are under increasing threat due to an increase in mining and agricultural activities within the study area.     

三位女性之悲歌——苔丝、爱玛、安娜“自杀”原由探析

笔者认为苔丝、爱玛、安娜“自杀”主要有三个方面的原因：首先，对爱情的绝望是她们自杀的最直接原因；其次，她们自身带着沉重的罪恶感。一方面想从现实环境中逃脱出来，一方面又无法摆脱既定的社会法则；最后，她们都生活在转型时期比较混乱的社会环境中，各种社会因素交织成一张巨网，使她们围困其中而无法动弹。     

Macrolides and lincosamides

Macrolides and lincosamides are first choice bacteriostatic antibiotics used in veterinary dermatology. The main antibiotics in these classes are erythromycin, lincomycin, clindamycin and tylosin. They are well absorbed if given orally and are able to penetrate well into infected skin. Their spectrum of action comprises bacteria commonly associated with skin infections, including staphylococci. Their main disadvantages are the rapid development of bacterial resistance and occasional gastroenteric upset, most often seen with erythromycin. More recently developed macrolides, such as azithromycin and clarithomycin, are bactericidal, have a larger spectrum of action, a longer endurance, less resistance and may be given once a day instead of two or three times daily.     

中国喀喇昆仑山禾本科植物资源及其评价

对中国喀喇昆仑山地区禾本科野生植物资源进行调查研究,结果表明该地区禾本科植物有18属,79种,4亚种,2变种;其中54%~59%为植物群落中的建群种或优势种;97.7%的种类为优良牧草,是该地区野生动物和家畜生存的重要食物来源;作物近缘种有赖草属(Leymus)和披碱草属(Elymus)植物约22种;防风固沙植物资源有芨芨草属(Achnatherum)、拂子茅属(Calamagrostis)、赖草属等约14种;水土保持植物资源有早熟禾属(Poa)、碱茅属(Puccinellia)等约26种;高海拔地区和北方冷季型草坪草资源有早熟禾属、羊茅属(Festuca)、(艹洽)草属(Koeleria)等约9种。     

肉鸡腹水症心肝肺显微和超微结构研究

运用光镜、电镜技术，观察了肉鸡腹水症自然发病鸡心、肝、肺的显微和超微结构。肺呈弥散性充血和水肿，三级支气管和肺房扩张，平滑肌肥大，软骨样和骨样小结节病灶明显增多，呼吸毛细管上皮细胞内出现大量空泡，肺气－血屏障结构受破坏。心脏肥大，右心扩张，心肌纤维间淤血、水肿，充满大量炎性细胞和结缔组织细胞。心肌变性坏死，肌原纤维断裂，有的横纹消失。肝充血肿大，表面被覆一层灰白色或淡黄色胶冻样物。肝血窦扩张，肝细胞索排列紊乱，肝细胞界限不明显，肝细胞质内的线粒体嵴模糊不清     

利用桑树叶资源发展畜牧业生产的可行性分析

桑树适应性广 ,我国各地均有分布 ,有些地区大面积栽培 ,主要用于养蚕生产。桑树是目前木本叶用植物中产量最高的树种之一 ,比经人工改造的南方山原草地的单位载畜量提高 5倍左右。桑叶的营养成分高于一般牧草 ,是木本植物中含量较高的树种。其粗蛋白和氨基酸总量不及大豆粉高 ,但各种氨基酸比例趋向一致 ,桑叶作为畜禽饲料养分很全面。养禽畜试验表明 ,桑叶作饲料适口性好 ,无采食障碍 ,食用后具有很高的消化率 ,品质提高……。因此 ,利用桑叶作为畜牧业的饲料非常有潜力 ,开发前景广阔。     

Histopathological and immunohistochemical features of proliferative lesions in the pituitary pars distalis of rats

Pituitary proliferative lesions derived from the endocrine cells of the pars distalis are frequently encountered and adenomas/carcinomas are a common cause of death in standard 2-year carcinogenicity studies using various rat strains, especially Sprague-Dawley. This report describes the immunohistochemical characteristics of pituitary tumors derived from the pars distalis in rats. Prolactin (PRL)-containing tumors are the most common, with PRL/growth hormone (GH) dual positive tumor masses (PRL/GH co-positive tumor masses) being more prevalent than only PRL-positive tumor masses (PRL single-positive tumor masses). GH-containing tumors are relatively numerous and many of these are also PRL/GH co-positive tumor masses. TSH-containing tumors are common in females. PRL-containing tumors have been shown to increase the incidence of hyperlactation in males and mammary adenomas/adenocarcinomas in females, suggesting that these masses are functional tumors.     

Sulphonamides: updates on use in veterinary medicine

Sulphonamides are the oldest class of antimicrobials and are still the drug of choice for many diseases in veterinary patients. They are classified based on their pharmacokinetics and pharmacodynamics. This article presents an overview of various sulphonamides in each classification, the mechanisms of bacterial resistance, and the effectiveness and maintenance of skin concentrations. Clinical indications, routes and frequency of administration, duration of therapy, compliance factors, cost, adverse drug reactions and drug interactions are described. Controversial topics such as current usage and recommendations for sulphonamide use in dermatology are also discussed.     

麦洼牦牛生长发育研究

测定1055头健康、发育良好、雌、雄性、0－4岁麦洼牦牛的体重和胸围、体长、体高等7个线性性状。公犊、母犊初生重分别为13．71、12．90kg，公牦牛1－4岁体重：72．89、127．21、169．19和197．36kg，胸围：113．73、137．67、153．26和159．91cm；母牦牛1－4岁体重：63．79、117．57、159．66和176．26kg，胸围：109．10、133．34、149．00和153．38cm。两种性别的体重和胸围、体长、体高3个大尺度性状增长曲线拐点出现在3周岁，其余4个小尺度性状增长曲线拐点出现在2周岁或稍后。