Relationship between the ultrasonographic findings of suspected superficial digital flexor tendon injury and the prevalence of subsequent severe superficial digital flexor tendon injuries in Thoroughbred horses: a retrospective study

The onset of severe injury to the superficial digital flexor tendon (SDFT) is extremely difficult to predict from slight changes in ultrasonographic findings in cases with no apparent clinical signs. This study investigated the relationship between an increased cross-sectional area (CSA) or edema in the subcutaneous tissue around the tendon and the subsequent onset of severe SDFT injury in Thoroughbred racehorses. Horses were classified into three groups based on ultrasound diagnosis (USD) findings: Group A included cases with enlarged tendons; Group B included cases with tendons of normal size but with prominent edema in the peritendinous tissue; and Group C (control group) included cases with no abnormal USD findings. The incidence of subsequent severe tendon injury was significantly higher in the horses in Groups A (25.7%, 28/101) and B (28.3%, 65/212) than in those in Group C (4.9%, 2/41). There were no significant differences in the median period and the median number of races from the first examination to the subsequent tendon injury between Groups A (140 days, 1 race) and B (120 days, 1 race). The results of this study revealed that horses with increased CSA and peritendinous edema are likely to suffer a subsequent severe tendon injury. Also, these two USD findings, i.e., increased CSA and peritendinous edema, indicate the risk of onset of severe SDFT injury.     

Detection of Oestrus in Bunaji Cows under Field Conditions

The objective of this study was to determine the efficacy of some aids for detectiong oestrus in 72 Bunaji cows synchronized using two injections of prostaglandin F₂ (PGF₂) 13 days apart. Blood samples to determine the accuracy of the aids and ovarian activity by radioimmunoassay technique were collected daily from the day of the second PGF₂ injection until oestrus or for 168 hours for `non-responders'. The aids for detecting oestrus, tail painting, KaMar detectors and a chin-ball mating device (CMD) were applied at the time of the second injection.The oestrus response rate was 73.6% and 61.1%, from the serum progesterone concentration and visual observation, respectively. Based on the total number of oestrus events observed, unaided visual observation, tail painting, KaMar and CMD detected 52.2%, 82.6%, 82.6% and 76.8%, respectively. Visual observation of standing oestrus alone failed to detect 47.8% of the occurrence of oestrus as shown by the concentration of progesterone in the serum and 30.4%, 30.4% and 24.6%, respectively, of the oestrus periods recorded by tail painting, KaMar and CMD. Twenty-eight cows showed abnormalities in progesterone concentration.These investigations showed that oestrus may be detected by using the aids in cows that have been regarded as `anoestrous' by visual observation of standing heat.     

复相乳化法制备明胶微囊蛋氨酸的工艺初探

以明胶和羧甲基纤维素钠为包囊材料,蛋氨酸为芯材采用复相乳化法制备蛋氨酸微胶囊。应用均匀实验设计分析了微胶囊制备过程主要影响因素及适宜的工艺条件,得出明胶溶液浓度对微囊的形成影响较大,优化参数得出蛋氨酸微胶囊载药量为61.30%。     

On the Analysis of EMCS and Its Application in the Project of Shenzhen Underground

In this paper, the selection of type, function and technological requirements of EMCS for Shenzhen Underground has been introduced.Based on the investigation for EMCS's worldwide applications and the analysis of practice in Shenzhen Underground, the comparison and selection of PLC and DDC have been done completely.At the same time,the introduction of EMCS is organized by the center level, station level and the spot level.     

高效液相色谱法测定黄皮果实中的有机酸

为深入了解黄皮果实中有机酸,采用水浴超声提取果实中的有机酸、高效液相色谱法测定的方法,对12份黄皮种质果实中有机酸的组分及含量进行研究。结果表明:在色谱柱Venusil XBP C18(T)(4.6 mm×250 mm,5μm)、流动相为0.01 mol/L(NH4)2HPO4(H3PO4调p H至2.7)、流速1 m L/min、柱温27℃、检测波长210 nm的条件下,黄皮果实中柠檬酸、草酸、乳酸、苹果酸、抗坏血酸、酒石酸得到良好分离,且测定精确灵敏、回收率高、重复性好,标准曲线相关系数为0.9975~0.9996,相对标准偏差为1.02%~1.84%,回收率为95.60%~101.78%。黄皮果实中有机酸以柠檬酸、草酸和苹果酸为主,乳酸在少部分种质中有测出,不同种质果实中柠檬酸、草酸、苹果酸含量分别为0.780~8.090、0.773~4.205、0.478~3.212 mg/(g·FW),分别占总酸的22%~65%、16%~40%、11%~20%。     

转基因水稻恢复系及其F1代Bt蛋白的时空表达分析

本研究以抗虫水稻恢复系9311(Bt)及其杂交种F1(Bt)为研究材料,以非转基因的9311为阴性对照,利用ELISA方法研究9311(Bt)及F1(Bt)各生育时期可溶性总蛋白和Bt蛋白的时空变化规律,为转Bt基因抗虫水稻的安全监管提供科学依据。结果表明：外源基因的导入没有引起水稻组织中可溶性总蛋白含量的明显变化;9311(Bt)的Bt蛋白表达量在整个生长周期的各个部位均高于相应的F1(Bt)植株;同一植株不同组织器官中Bt蛋白表达量为：叶片跃胚乳跃颖壳及茎秆跃根;同一植株不同发育期叶片Bt蛋白的测定结果整体表现为：营养生长阶段跃生殖生长阶段跃成熟衰老阶段。研究结果为转Bt基因抗虫水稻适宜检测时期的选择提供了一定的参考。     

从地下的角度分析膜下滴灌棉花发生早衰的可能机制

在膜下滴灌条件下,棉花早衰问题严重。在对国内外关于棉花早衰研究成果及膜下滴灌条件特殊根区微环境深入分析的基础上,提出了膜下滴灌棉花早衰原因的合理假设,认为不合理的根系构型及其高蕾铃负荷是造成膜下滴灌棉花早衰的根本原因：膜下滴灌条件下棉花根系生长和构型分布发生的明显变化不利于棉花根系吸收土壤深层的水分和养分,抗逆性减弱,对环境的改变无法做出及时的反应,加之覆膜增温及优越的水肥供应,棉花地上部生长良好,蕾铃负担增加,一旦遇到逆境条件,在高蕾铃负荷前提下,即使对根系养分吸收功能最轻微的损害或者暂时的养分供应短缺均有可能造成对地上部养分供应的不足并发生早衰。因此,如何通过调控构建与地上部生长更为匹配的、构型分布更加合理的、抗逆性更强的棉花根系就成为解决膜下滴灌棉花早衰问题的关键。     

叶面肥对无土栽培樱桃番茄性状的影响及产量与植株性状的数学模型研究

为了探索樱桃番茄无土栽培在海南热带地区种植效果及植株产量效应,本研究通过增施不同量叶面肥,设计3种处理、3次重复随机试验,并对试验最佳效果的植株产量、株高和茎粗建立相关数学模型。结果表明,增施叶面肥较传统施肥有明显增产效果,平均增产2250 kg/hm²,增产20.2%。而樱桃番茄株高与产量、茎粗与产量具有显著相关性,其模型分别为Y_单株产量=(47.92060X_{株高-24.95763)² (P= 0.0114＜0.05)和Y单株产量=(61.885X茎粗-46.97988)² (P=0.0372＜0.05),符合植株生长趋势变化。因此,在海南开展樱桃番茄无土栽培是可行的,且可以通过调控来调节植株生长情况从而提高产量,增加经济效益。}     

温度势差驱动玉米去水试验研究

从能势转换的角度探讨谷物节能干燥工艺,即利用自然界自身存在的温度势差驱动谷物水分气化、迁移和扩散,达到去除高水分玉米水分和提高粮温的目的,并通过试验验证了该方法的可行性,为烘干机高效节能设计提供基础数据。     

浅谈中国园林中的水榭

通过若干实例分析,探讨了中国园林中水榭的形式风格以及在园林中的功能。