灭鼠施饵方法试验初报

为探索防治高原鼠兔的工作效率 ,采用对比试验的方法 ,进行了机械撒施 ,人工洞口投施及不同撒施带距的试验。结果表明 ,机械撒施 ,人工洞口投施两处理防治效果差异不显著 ,撒施带距5 0 m和 2 5 m两处理间 ,其防治效果也不显著。     

A Character Recognition Based on Feature Extraction

This thesis analyzes the theory of image processing and feature extraction, character feature is investigated in this thesis, including width, intersection, chain-code, the way of structure of character is used, a hand-written character recognition and entry system is developed. It is proved feature is simple and definite.     

Hand‐assisted laparoscopic adhesiolysis of extensive small intestinal adhesions in a mare after breeding injury

In this article we report the course of disease in a mare following severe vaginal injury during natural cover. Although the genital injury healed completely, the mare developed extensive intra‐abdominal intestinal adhesions causing complete small intestinal obstruction 2 years after the incident. The adhesion was not accessible during initial emergency laparotomy and a standing, hand‐assisted laparoscopic adhesiolysis and jejuno‐jejunal end‐to‐end anastomosis were subsequently performed. The mare was subjected to euthanasia 10 weeks after surgery due to recurrence of abdominal pain. The pertaining literature is discussed in regards to this case.     

Objectives and Integrated Approaches for the Control of Brown Tree Snakes

The inadvertent introduction of the brown tree snake (Boiga irregularis) to Guam has resulted in the extirpation of most of the island's native terrestrial vertebrates, has presented a health hazard to small children, and also has produced an economic problem. Management of brown tree snakes is aimed at a number of objectives, the foremost of which has been to deter its dispersal through Guam's cargo traffic to other locations. Another objective is to reclaim areas on Guam for reintroduction of native wildlife. A related objective is the protection of small sensitive sites on Guam from brown tree snake intrusion, such as power stations or nesting trees and caves. A fourth objective is to contain and capture incoming brown tree snakes at destinations vulnerable to their introduction. A final objective is to control incipient populations in other areas beyond their native range. A number of control tools have been developed, or are being developed. The efficacy of each control method depends on the situation to which it is to be applied. The control methods are described individually and the suites of methods most suited to each management objective are discussed.     

Protein requirements for Blue-fronted Amazon (Amazona aestiva) growth

The objective of this study was to evaluate the protein requirements for hand-rearing Blue-fronted Amazon parrots (Amazona aestiva). Forty hatchlings were fed semi-purified diets containing one of four (as-fed basis) protein levels: 13%, 18%, 23% and 28%. The experiment was carried out in a randomized block design with the initial weight of the nestling as the blocking factor and 10 parrots per protein level. Regression analysis was used to determine relationships between protein level and biometric measurements. The data indicated that 13% crude protein supported nestling growth with 18% being the minimum tested level required for maximum development. The optimal protein concentration for maximum weight gain was 24.4% (p = 0.08; r(2) = 0.25), tail length 23.7% (p = 0.09; r(2) = 0.19), wing length 23.0% (p = 0.07; r(2) = 0.17), tarsus length 21.3% (p = 0.06; r(2) = 0.10) and tarsus width 21.4% (p = 0.07; r(2) = 0.09). Tarsus measurements were larger in males (p < 0.05), indicating that sex must be considered when studying developing psittacines. These results were obtained using a highly digestible protein and a diet with moderate metabolizable energy levels.     

杂交粳稻“榆杂29”苗期生理优势研究

 “榆杂29”在苗期具下列生理优势:(1)播种萌发后胚乳中(α+β)淀粉酶活性最高,胚芽、胚根生长最迅速,形态建成最快.(2)硝酸还原酶活性较高,耐肥性好.(3)游离氨基酸和酰胺含量最低,蛋白质合成最快.(4)还原糖含量较高,碳代谢旺盛.(5)根中(琥珀酸)脱氢酶活性较高,根系活力高;(6)过氧化氢酶活性居中等水平,意味着:①光呼吸较低,光合产物损耗较少,利于干物质积累,且CO₂补偿点低,利于加强光合作用;②消除H₂O₂毒性的能力较强,利于光合作用进行.(7)抗逆性最强.①自由水含量最低,束缚水含量最高,“束缚水/自由水”最大;②离体叶片在空气中的失水速率最小,保水力最强;③阴雨后游离脯氨酸含量较高.     

关于草畜平衡的几个理论和实践问题

论述了与草原牧区草畜平衡密切相关的几个重要概念及其在实践中的应用问题,对草原“三化”的具体含义给出了概念上的区别;提出了草畜平衡的实质是人草平衡的观点;讨论了确定草原载畜量所涉及的基本概念和实践问题,特别是牧业年度和年末存栏量对载畜量确定的影响。通过对畜群结构优化、草原畜牧业发展阶段、划区轮牧和季节畜牧业等概念的讨论,进一步阐述了在草原牧区提高畜牧业经营水平和维持草畜平衡的相关理论和实践问题。     

Hand and mechanical properties of stretch fabrics

This paper discusses the hand and preference of stretch fabrics for sportswear through subjective and objective hand evaluations. Twenty-two varieties of stretch fabrics for fall/winter sportswear fabrics were used. Seven main factors were classified through subjective evaluation and total cumulative variance value was 68.28 %. According to correlations between objective hand and preference, there are differences in preferences for pants and shirts, and in response to preference for shirts, no gender differences are observed. Correlations between subjective hand and preference show that there is a similar tendency in preferences for pants and shirts regardless of usage by different genders.     

中药连翘对大肠杆菌R质粒消除作用的研究

目的：探讨中药连翘对大肠杆菌R质粒的消除作用,使其重新恢复对抗生素的敏感性。方法：将大肠杆菌DH5α制备成感受态后,导入含有Ampr基因的质粒,再用连翘作用转化后的大肠杆菌,经培养12h后,挑出亚抑菌浓度的菌落涂于含有Amp的平板上培养24h,观察有无细菌生长,并通过电泳检测是否消除质粒。结果：在含有Amp平板上无大肠杆菌生长,在不含Amp的平板上细菌生长良好,质粒DNA电泳检测结果经中药作用过的大肠杆菌无质粒带,表明连翘对质粒具有消除作用。