自动引导行走车环境理解系统的研究

以立体视差测距原理为基础，用两个摄像机同时对同一景物进行拍摄，根据景物在左、右图像中的视差，计算目标距控制点的三维空间的实际距离，可以得到一张关于行走车工作环境的地图，以便进行路径计划。本文给出了一种农用自动引导行走车的环境理解系统的构成方法，经实验验证，该方法可行，适合我国农业发展的趋势，有发展前途     

Anaphylaxis after vaccination for cats in Japan

Severe adverse reactions in cats after vaccination were examined from 316 cases reported to the Ministry of Agriculture, Forestry and Fisheries (MAFF) in Japan during 15-year period from April 2004 to March 2019. We found that 130 (41%) showed anaphylaxis, and 99 (76%) of the 130 cases of anaphylaxis resulted in death. Veterinarians should be well prepared to deal with vaccine-associated anaphylaxis in cats. Bovine serum albumin (BSA) as indicator of purification was detected at high levels in commercially available feline vaccines. BSA might derive from fetal calf serum in culture media. This study provides useful information about anaphylaxis including critical details of the potential clinical signs associated with adverse events to feline vaccination.     

玉米11个ZmbZIP基因的鉴定及表达特征分析

以玉米自交系郑58为试验材料,利用生物信息学方法和qPCR技术,设置200 mmol/L NaCl、20%PEG6000、4 ℃低温和硝态氮或铵态氮缺乏等胁迫试验,对11个ZmbZIP基因进行生物信息学分析,探测这些基因应答低温、干旱、盐害、缺氮等胁迫时的响应表达模式。系统进化树分析结果表明,11个ZmbZIP基因可以细分为2个亚组;qPCR分析结果表明,不同亚组的ZmbZIP基因在玉米不同组织中呈现不同的表达特征,同一亚组的基因呈现类似的表达模式,反映了ZmbZIP基因在玉米生长发育进程中生物学功能的保守性和分化性。人为模拟盐、干旱、低温和氮缺乏等胁迫的结果表明,ZmbZIP基因受到各种逆境因子的广泛调控,亚组I中的ZmbZIP1、ZmbZIP6和ZmbZIP13的表达量同时受NaCl溶液胁迫诱导而上调(相对表达量上调2倍),受PEG6000胁迫抑制下调;亚组II中的ZmbZIP38、ZmbZIP77、ZmbZIP112和ZmbZIP124同时受盐、PEG6000和低温胁迫诱导上调,硝态氮缺乏胁迫抑制ZmbZIP1、ZmbZIP6和ZmbZIP134基因表达,而铵态氮缺乏胁迫下,这3个基因表达明显上调,推测这些基因广泛参与应答逆境胁迫响应途径。     

花卉常规杂交育种的研究进展

本对花卉育种的历史和花卉常规常规杂交育研究进展及各种杂交技术方法进行综述。花卉常规杂交育种的应用领域人：（1）培育花色、花型和香味等观赏性状更加新颖的品种；（2）改变花期；（3）提高花卉适应性和抵抗病虫害能力。并对花卉常规杂交育种未来的研究方向作了展望。     

乌兰布和沙漠抗逆植物选择试验及利用

乌兰布和地区光，热，水，土资源丰富，在国家开发西北地区的大政策下，适合进行农，林，牧业开发，但是限于本地区干旱，少雨，风沙大的现状，开发要在以改善生态环境为目的的防护林建设的基础上进行，为本地区增选抗性强，生长快，见效快的灌木品种是当务之急，也是长远需要，本试验选取了干旱地区常见的8种沙旱生灌木进行造林实验，选择出最适于该地区生长的灌木品种主造林方式。     

赤桉种源生长适应性,抗逆性及其遗传稳定性研究

对赤桉４批试验林４２个种源４￣８年生幼林的生长适应性，抗逆性及其遗传稳定性进行分析研究结果。     

11个玉米bZIP基因应答逆境胁迫的表达分析

bZIP基因家族是一类广泛存在于植物中的重要转录因子,在植物生长发育及应答逆境胁迫响应途径中发挥重要作用。选取11个玉米bZIP基因作为研究对象,系统地研究了ZmbZIP基因应答各类逆境胁迫时的表达模式。进化树分析结果显示11个ZmbZIP基因聚合为一个大家族,并可以进一步细分为3个亚组。qPCR分析结果显示8个ZmbZIP基因表达模式在玉米不同组织中呈现明显差异,预示着在玉米生长发育进程中功能多样化。 人为模拟盐、干旱、低温和硝态氮或铵态氮缺乏胁迫等研究结果表明,8个ZmbZIP呈现不同的表达模式,ZmbZIP71和ZmbZIP129同时受200 mmol·L^-1 NaCl溶液、20% PEG6000和4 ℃低温胁迫的诱导（>2倍）,而其他ZmbZIP在应答3种非生物胁迫时呈现不同的表达模式。叶片和根系中ZmbZIP基因受不同氮形态缺乏胁迫的调控,叶片中有6个ZmbZIP基因受铵态氮缺乏胁迫的诱导,有2个ZmbZIP受硝态氮缺乏胁迫明显抑制,根系中ZmbZIP9、ZmbZIP69和ZmbZIP71同时受2种胁迫因子的影响,而有5个ZmbZIP基因受2种不同胁迫处理的影响不同,显示叶片或根系ZmbZIP基因在调控氮缺乏胁迫响应机制中具有不同的生物学功能。结果可为将来深入研究这些基因的生物学功能提供科学数据。     

Pathology and Neurotoxicity in Dogs after Repeat Dose Exposure to a Serotonin 5-HT1B Inhibitor

AZD3783, a cationic amphiphilic drug and a potent inhibitor of the 5-hydroxytryptamine (5-HT_1B) receptor, was explored as a potential treatment for depression. To support clinical trials, repeat dose toxicity studies in rats and dogs were conducted. Here we report toxicity findings in dogs after dosing from 1 to 3 months. In the 1-month study, there were minimal neuronal vacuolation in the brain, a marked increase in liver enzymes accompanied by hepatocellular degeneration/necrosis and phospholipidosis (PLD), and PLD/cholecystitis in the gallbladder of animals dosed at 47 mg/kg/day. In the 3-month study, neurotoxicity resulted in euthanasia of one animal dosed at 30 mg/kg/day after 86 days. Extensive pathologic changes were seen in all animals in retina epithelium (inclusion bodies), brain (neuronal vacuolation, degeneration, or necrosis and nerve fiber degeneration), spinal ganglia (vacuolation, degeneration, or necrosis), as well as sciatic and optic nerves (degeneration). Pigment-laden macrophages were observed in the lung, kidney, liver, gallbladder, bone marrow, gastrointestinal tract, and lymphoid tissues. Also seen were vitrel and retinal hemorrhage in the eyes. A brain concentration and pathology study showed that the concentration of AZD3783 in the brain was approximately 4 times higher than in the plasma after 4 weeks of dosing, however, they were similar in all regions examined, and did not correlate with areas with pathologic findings. Our findings with AZD3783 in dogs have not been reported previously with other CNS compounds that effect through serotonergic pharmacology.     

长白种猪优化选配减少近交畸形的研究

以华南某1 500头规模种猪场2009年到2010年1 502窝长白猪分娩信息进行优化、选配减少近交畸形的研究,结果显示血缘选配优化时将近交系数控制在1%比3%效果明显,平均产活仔数从10.39头/窝提高到10.46头/窝(P＞0.05),畸形率从10.30%下降到4.79%(P＜0.01);对其中402窝出现畸形仔猪...     

江汉平原管道沿线不良土体的特性及处理措施

介绍了忠县—武汉输气管道在江汉平原段沿线的自然地理概况，研究了江汉平原管道沿线的膨胀土、淤泥类土和粉细砂等不良土体的工程地质特性，统计分析了这些不良土体的工程参数。指出不良土体对管道建设具有潜在的危害性，提出了符合管道建设的设计和施工处理措施。