卫星搭载对新麦草二代种子活力的影响

不同含水量的新麦草种子经卫星搭载,返回后对其二代种子进行室内分析。结果发现,卫星搭载对新麦草二代种子发芽能力、种苗生长、种子浸出液电导率有显著影响,具体变化因品种而异。种子含水量对卫星搭载效应有重要影响,当含水量为10%-12%,卫星搭载效应减弱;当含水量偏离这一范围时,卫星搭载效应增强。     

关于我国服务业集聚若干问题的研究

产业集聚是生产要素流动和配置的一种必然现象。随着我国经济的快速发展,服务业在地理空间上的集聚趋势进一步增强,产值比重明显上升。本文对我国服务业集聚的发展、理论依据、优势来源等方面进行了分析,具体阐述了服务业集聚的机理及效应、评价指标与影响因素。     

太阳光高速扫射地球表面对地球战争和政局势力变迁的影响研究

分析由于地球倾斜高速自转和绕太阳高速做公转运动,太阳光高速扫射地球表面会产生切向力效应和流体力学效应产生从而对地球战争和政局势力变迁的影响,创新得出影响力方向定律和区域影响力度计算公式,总结其适用范围,并对具体国家具体地区战争和政局根据定律和计算公式进行实例分析。     

“罗森塔尔效应”在学生管理中的启示

"罗森塔尔效应"在大学生教育管理上的具体应用,是要以平等、平和、平常的心态对待每一位学生,要知道,教师的一个不经意的行为,很可能就改变了一个学生的一生,或造就了一位伟人。作为辅导员在平时的教学工作上要求精益求精,在学生管理工作上要求无微不至。     

氢氧化铝佐剂研究进展

氢氧化铝佐剂作为疫苗佐剂己有近80年的历史。其由于高吸附能力及对某些抗原具有较好的吸附性而优于其它佐剂,它也是唯一被美国FDA认证的人用疫苗佐剂,虽然氢氧化铝佐剂应用历史悠久,但其具体作用机制不明,目前认为主要是“储存库效应”和“免疫刺激效应”两种机制。纳米技术可能会给佐剂领域带来新的发展。纳米颗粒的单晶或多晶微粒具有小尺寸效应、良好的表面或界面效应、靶向作用及缓释作用等,其作为疫苗佐剂的作用己引起了人们的关注。     

氢氧化铝佐剂研究进展

氢氧化铝佐剂作为疫苗佐剂己有近80年的历史。其由于高吸附能力及对某些抗原具有较好的吸附性而优于其它佐剂,它也是唯一被美国FDA认证的人用疫苗佐剂,虽然氢氧化铝佐剂应用历史悠久,但其具体作用机制不明,目前认为主要是"储存库效应"和"免疫刺激效应"两种机制。纳米技术可能会给佐剂领域带来新的发展。纳米颗粒的单晶或多晶微粒具有小尺寸效应、良好的表面或界面效应、靶向作用及缓释作用等,其作为疫苗佐剂的作用己引起了人们的关注。     

酸化剂对大圩商品猪生产性能的影响

近年来随着猪肉质量控制手段的研究进展，作为抗菌素添加剂替代物的酸化剂引起养猪业的关注。酸化剂对幼猪早期消化道的营养和保健作用是近年来的研究热点，在饲养效果方面取得了一定的进展（Roth等。1998）。饲粮系酸力（唐湘方等，2005）的控制受到关注。现实生产中需要研究解决的是某种具体酸化剂对某一具体猪种在某一饲养条件下产生的生产全期的效应，并关注到终端产品——猪肉的质量，这对主攻肉质的杂交组合尤为重要。     

善用“领头羊效应”:高职院校班级管理事半功倍

高职院校的班级管理工作越来越复杂,但却无法避免而且举足轻重。本文分别从学习、社团与交际、兼职与创业三方面入手,阐述了领头羊效应的具体应用以及预期的效果。将领头羊效应充分地运用到班级管理中,将有效的提高管理效率和质量,值得我们去探索与尝试。     

生态猪的健康养殖与疾病预防技术探析

近年来,随着人们食品安全意识的提升,生态猪的需求量逐渐上升。生态猪与传统生猪养殖不同,养殖人员要秉承绿色、安全、健康的理念开展养殖,以提高猪肉的整体适口性,进而让生态猪养殖工作符合大众需求。因此养殖人员要做好疾病预防工作,切实提高生态猪养殖的经济效应与社会效应。养殖人员要加强了解健康养殖理念的具体需求,将其与实际养殖工作相结合。为此,本文就以生态猪养殖为例,对健康养殖与疾病预防技术进行了深入分析。     

含次生代谢物饲料组合效应评定方法的比较研究

文章综述了植物次生代谢物的概念、功能及其营养与抗营养作用,并就反刍动物含次生代谢物饲料组合效应的研究方法进行了比较研究,指出瓶子产气法较注射器产气法更适合于在发展中国家开展此类研究,同时提出了具体的设计方法。并特别指出,在用体外产气技术筛选出具代表性的组合后,再结合动物饲养试验,能较全面、准确地评定含次生代谢物饲料的组合效应及其营养代谢机理。     

草原土壤速效磷测定方法的比较

文章比较了草原土壤速效磷测定的脱色方法，并提出改进措施，这种改进方法可供批量分析高有机质含量的土壤时使用。     

斑点免疫金渗滤试验检测绵羊脑多头蚴病的研究

为了寻找一种快速、简便诊断绵羊脑多头蚴病的新方法，应用自行配制的胶体金探针标记SPA，建立了斑点免疫金渗滤试验（DIGFA）。该法同ELISA具有良好的相符性。将抗原、待检血清滴加于膜上进行反应，数分钟内即可用肉眼进行结果判定。本法具有操作简单、反应快速、敏感性强、重复性好、不需要贵重仪器等优点，适合于基层推广应用。     

ULTRASONOGRAPHIC IMAGING OF THE VAGOSYMPATHETIC TRUNK IN THE DOG

The purpose of this study was to evaluate the applicability of ultrasonographic imaging of the vagosympathetic trunk in the dog. Cervical ultrasound was performed in 30 healthy dogs. In all 30 dogs the vagosympathetic trunk was detected as a hypoechoic structure in the carotid sheath, adhering the dorsomedial surface of the common carotid artery. The echotexture of the nerve was heterogeneous with anechoic areas separated by hypoechoic bands. A scanner equipped with a 5 to 8 MHz linear array probe was used for imaging and measurements. The diameter of the vagosympathetic trunk ranged from 0.59 to 2.48 mm varying in correlation to the body weight. In summary, ultrasonography is a helpful noninvasive method to image and evaluate the cervical vagosympathetic trunk in the dog.     

腐霉素的致突变性研究及其潜在致癌性预测

腐霉素是一种具有抗球虫性能的聚醚类抗生素。本文选择Ａｍｅｓ试验，微核试验和精子畸形试验等三种试验组合来检测腐霉素的致突变性，并在此基础上，用致癌性预测和选择试验组合的方法（ＣＰＢＳ法）预测其潜在致癌性。试验结果表明，腐霉素Ａｍｅｓ试验，微核试验和精子畸形成试验均为阴性；ＣＰＢＳ法预测霉素可能是潜在致癌物的概率为８．５２％，因而被评为非致癌物。     

不同草地分类方法对北京山区灌草丛草地分类的比较研究

本文用样线法对北京山区的灌草丛草地进行了测定。用并行指示种分析法、多元聚类法及传统分类法对其进行了分类,并对这三种方法对该类草地的分类结果进行了比较分析,结果说明并行指示种分析法较其余两种方法为好。     

SCINTIGRAPHIC EVALUATION OF THE THORACIC SPINE IN THE ASYMPTOMATIC RIDING HORSE

Scintigraphic evaluation of the spinous processes of the equine spine has been done by subjective evaluation of radiotracer uptake in clinically abnormal horses. To determine the range of variation in asymptomatic riding horses, 33 normal horses were examined. Two 60 degrees oblique views of the thoracic and lumbar spine were evaluated subjectively, and a semi quantitative method based on standardized regions of interest in each spinous process in T10-L3 was also applied. A ratio between each spinous process and a reference area (Rib 15 or 16) was calculated. The effects of two different color displays and a smoothing filter were assessed. The results of the subjective evaluation was compared to the calculated ratios, and the associations between age, gender, weight, height, use and increased radiotracer uptake, and ratios were analyzed. No significant association was found between age, gender, weight, height, use and increased radiotracer uptake, or ratio. One or more areas of increased radiotracer uptake between T13 and T18 were common in the asymptomatic riding horse, which may have implications for the interpretation of clinical patients. The blue, green and red color display had a higher sensitivity for detecting increased radiotracer uptake compared to the continuous grayscale. The smoothing filter used in this study had no effect on the detection of areas with increased radiotracer uptake. The association between the results of the subjective evaluation and the semi quantitative method was apparent when analyzed in T13-17. To evaluate if the semi quantitative method can replace the subjective evaluation, studies on clinically affected horses are necessary.     

A SURGICAL TECHNIQUE FOR THE COLLECTION OF CERVICAL MUCUS IN THE EWE

A technique for collecting cervical mucus in ewes is described. By a surgical procedure, the cervix was fixed to the ventral abdominal wall to enable mucus to be collected continuously into a container attached to the ewe. Mucus was collected successfully by this method for up to 14 months.     

TWO-DIMENSIONAL REAL-TIME OCULAR ULTRASONOGRAPHY IN THE DOG

Two-dimensional real-time ultrasonography was performed with three different methods to determine the optimal technique for scanning canine orbital soft tissues. The three techniques included positioning the transducer on the clipped closed eyelid (eyelid contact method), directly on the cornea (corneal contact method), or on a small waterfilled balloon in direct contact with the cornea (water bath offset method). Horizontal and vertical images from the three techniques were compared and graded for diagnostic quality. The corneal contact method provided superior anatomic definition of the posterior globe and extraorbital tissues, whereas the water bath method gave higher-quality images of the anterior chamber and lens. Use of the eyelid contact method to image the eye and periorbital structures was not recommended because of multiple artifacts that severely degrade the image.     

THE EFFECT OF OBLIQUITY ON THE RADIOGRAPHIC APPEARANCE OF THE TEMPOROMANDIBULAR JOINT IN DOGS

The temporomandibular joint is formed between the condyloid process of the mandible and the mandibular fossa of the temporal bone. The basic anatomy of this joint was assessed and described in a series of skulls including dolichocephalic, mesaticephalic and brachycephalic breeds. The facial index and rotational angles were measured with the facial index providing a useful method of classifying skull types but the rotational angle being of limited use in assessment of the temporomandibular joint until normal breed values are established. Equipment was designed to allow repeatable positioning of the temporomandibular joint for radiography at a variety of lateral and long axis rotational angles relative to the central x-ray beam. The regions of the joint and anatomic features visualized in each view are demonstrated. 10 degrees rotation was required in either axis to project the joints independently of each other. Lateral rotational angles of 10 to 30 degrees in mesaticephalic and dolichocephalic breeds and 20 to 30 degrees in brachycephalics and long axis rotational views of 10 to 30 degrees depending on the region of interest were considered to be the most useful.     

影响尼龙袋法测定牧草消失率因素的分析

对影响瘤胃瘘管－尼龙袋法测定牧草干物质消失率的因素进行了对比试验。结果表明：瘤胃瘘管的安装以两步法比一步法好。尼龙袋在瘤胃中的停留时间以２４ｈ。尼龙袋中的样品量对消失率影响不大。尼龙袋在瘤胃内容物中的深度对消失率无明显影响，供试动物间存在着差异。