Idiopathic eosinophilic colitis lesions of the equine small (descending) colon

Five horses with a primary surgical lesion of the small (descending) colon were diagnosed with eosinophilic colitis based on visual and histopathological examination. These were evident as visibly striking, hyperaemic, focal lesions of the small colon, with serosal petechiation, oedema and marked thickening of the intestinal wall at the site. Areas of focal necrosis were also evident. The gross appearance of the lesions were considered to be sufficiently severe in all cases to merit resection, due to concerns about intestinal necrosis and septic peritonitis. An inability to fully exteriorise the affected portion of intestine to perform a resection and anastomosis necessitated intraoperative euthanasia of one horse. A total of three horses survived to hospital discharge. Eosinophilic colitis lesions are a rare cause of severe small colon disease, but should be considered in cases with similar visual characteristics.     

三叶木通栽培条件下的生长结果习性

三叶木通[Akebia trifoliata(Thunb)Koidz]是木通科木通属的一种营养价值较高的半落叶藤本野生果树。果实是一种品质优良的野生鲜食水果,但其种子多,果肉少,可食率较低,需要经过驯化选育栽培加以利用。从2005年起搜集野生三叶木通进行人工驯化栽培,观察其生长结果习性。结果:在人工栽培条件下果实最大单果重313.5 g、最小97.7 g、平均单果重78.1~244.1 g,并初步掌握了其生长结果习性,为进一步生产栽培及育种打下了基础。     

高坡猪GH基因不同基因型对其部分生产性能的影响

采用PCR-RFLP-ApaⅠ方法检测高坡猪GH基因-119~ 486 bp片段的多态性,探讨了不同基因型对其部分生产性能的影响。结果表明:产生2个等位基因A(449 bp)和B(316 133 bp),其频率分别为0.54和0.46;3种基因型:AA、AB和BB,其频率分别为0.26、0.56和0.18;除6月龄腹围和背膘厚外,其余指标值均以BB基因型最高,AA基因型的6月龄腹围和瘦肉率与BB基因型相比差异显著(P<0.05),其他指标在各基因型间差异均不显著(P>0.05)。表明,A可能是小型猪的有利等位基因,B则可能是大型猪的有利等位基因。     

迷迭香抗氧化剂和精油综合提取技术研究(Ⅲ)——超临界CO2萃取法

超临界CO2萃取(SCDE)法是迷迭香抗氧化剂和精油综合提取的有效方法之一.迷迭香抗氧化剂和精油超临界CO2萃取的优选条件为:萃取时间 4 h,夹带剂 95% 乙醇与迷迭香叶子的质量比为2∶5,萃取罐和分离器I的温度分别为50和 70 ℃,分离器II的温度为 40 ℃,萃取压力 20 MPa,分离压力为4～5 MPa.迷迭香精油的平均得率为 1.80%,迷迭香精油主要含有1,8 - 桉叶素、樟脑、α - 松油醇、龙脑、马鞭草烯酮、 4 - 松油醇、乙酸龙脑酯和芳樟醇等成分.迷迭香抗氧化剂的平均得率为 11.93%,主要含有鼠尾草酸、鼠尾草酚和迷迭香酸等活性成分,其质量分数分别为 23.61%、 7.33% 和 5.13%.     

Responsible Research and Innovation Framework,the Nagoya Protocol and Other European Blue Biotechnology Strategies and Regulations: Gaps Analysis and Recommendations for Increased Knowledge in the Marine Biotechnology Community

As the quest for marine-derived compounds with pharmacological and biotechnological potential upsurges, the importance of following regulations and applying Responsible Research and Innovation (RRI) also increases. This article aims at: (1) presenting an overview of regulations and policies at the international and EU level, while demonstrating a variability in their implementation; (2) highlighting the importance of RRI in biodiscovery; and (3) identifying gaps and providing recommendations on how to improve the market acceptability and compliance of novel Blue Biotechnology compounds. This article is the result of the work of the Working Group 4 “Legal aspects, IPR and Ethics” of the COST Action CA18238 Ocean4Biotech, a network of more than 130 Marine Biotechnology scientists and practitioners from 37 countries. Three qualitative surveys (“Understanding of the Responsible Research and Innovation concept”, “Application of the Nagoya Protocol in Your Research”, and “Brief Survey about the experiences regarding the Nagoya Protocol”) indicate awareness and application gaps of RRI, the Nagoya Protocol, and the current status of EU policies relating to Blue Biotechnology. The article categorises the identified gaps into five main categories (awareness, understanding, education, implementation, and enforcement of the Nagoya Protocol) and provides recommendations for mitigating them at the European, national, and organisational level.     

动态载荷下基于声发射技术的杨木破坏过程检测

利用声发射检测和力学试验相结合的方法,研究山杨木材在动态载荷下的声发射演变过程;结合木材粘弹性特点,通过声发射参数分析研究在不同受力阶段木材的声发射特点.结果表明:1)声发射信号幅值不连续,是跃迁的;材料断裂前声发射信号的幅值和能量比断裂后小,在断裂点对应声发射信号幅值和能量的局部极大值.2)随时间和载荷的变化,声发射累计撞击数和累计能量增加快慢可以体现杨木在受力条件下的完全弹性、弹性为主的弹塑性共存、塑性为主的弹塑性共存3种状态.3)声发射率和幅值参数可以预测材料纤维开始断裂进入危险期的第一"临界点"和材料大量纤维断裂进入严重危险期的第二"临界点",如果继续加载材料将会破坏断裂.     

红檵木叶色变化的生理生化研究

红檵木(Loropetalum chinense var.rubrum)在春季新叶初发时,花红叶红,且叶片红艳可人,具有很高的观赏价值.但随着叶龄的增大,叶色发生较大变化,在初夏叶色变为暗红色,到了盛夏高温季节,叶色几乎变成了绿色,出现了生产上称之的"高温返青"现象.     

火炬松半同胞子代配合选择的遗传增益估算

以半同胞子代为材料,开展火炬松生长性状的评价并进行配合选择,在估算3种遗传力的基础上,估算配合选择的遗传增益.子代测定林分别建于广东英德(24°15'N,113°45'E)和浙江富阳(30°15'N,119°58'E)2个地点,包含24个共同家系,均来自广东英德火炬松种子园.子代林为随机区组设计,6次重复,英德试点为6株行式小区,富阳试点为8株行式小区.以SAS(R)/STAT统计软件的VARCOMP过程用限制性最大似然法估算的方差成分进行遗传力的估算.结果表明:6年生树高单株遗传力、家系内遗传力和家系遗传力分别为0.161、0.129和0.579,胸径遗传力分别为0.075、0.059和0.384,单株材积遗传力分别为0.104、0.082和0.471.用3个公式估算配合选择的遗传增益.在数据严重不平衡的情况下,3个公式估算的结果非常接近,显示了简便的估算公式,即利用家系遗传力和家系内遗传力以及相应的选择差进行估算的公式,具有实用性和可靠性.     

FRW阻燃胶合板的DMA分析

目前世界范围内木材资源短缺的情况日益加剧,发展人造板工业已成为世界各国解决木材资源严重不足的重要途径.其中,胶合板作为室内装饰的主要材料,其产量和需求量都在急剧增长.我国胶合板产量从1980年的33.00万m3增长到2004年的2 098.62万m3,呈现大幅度增长的趋势(张文标等,2000).但由于普通胶合板具有易燃性,在许多领域的应用上受到限制.因为一旦发生火灾,不仅造成重大的经济损失,而且往往会发生人员伤亡.1950-2003年全国共发生火灾4 177 730起,直接经济损失2 434.525 1亿元,因火灾死亡174 855人,受伤329 352人.