Analysis of blood biochemistry and arterial blood gas of systemic inflammatory response syndrome in the early time after trauma

AIM: To explore the variation of blood biochemistry and arterial blood gas of patients with systemic inflammatory response syndrome (SIRS) in the early time after trauma and improve the diagnosis and first aid. METHODS: Eighty-eight patients with trauma from August 2003 to February 2004 were divided into two groups by their AIS-ISS90 score. The data of temperature, pulse, respiratory rate, white blood cell counts, Hb, blood glucose and arterial blood gas (PaO₂, PaCO₂, HCO₃^-, AG) were collected and compared with each group by statistic methods. RESULTS: Of the 88 patients, 49 underwent SIRS, 12 in light trauma group (ISS≥16) and 37 in severe trauma group (ISS<16). Compared with light trauma group, the data of pulse, respiratory rate, white blood cell counts, blood glucose, AG and rate of SIRS of severe trauma group were higher, PaO₂ and HCO₃^- were lower and the cases of PaCO₂>45 mmHg or <35 mmHg were more (P<0.01). The data of temperature and Hb had not significant difference between two groups (P>0.05). 13 patients had MODS in severe trauma group and 2 died while none had MODS or died in light trauma group. CONCLUSION: Application of AIS-ISS90 and SIRS-related blood biochemistry and arterial blood gas is beneficial for the diagnosis and treatment of patients in the early time after trauma.     

Bt玉米对中红侧沟茧蜂发育的间接影响及室内行为研究

利用Y-型嗅觉仪研究了中红侧沟茧蜂(Microplitis Mediator Haliday)对Bt玉米、常规玉米、粘虫幼虫和其虫粪及虫害苗挥发物的行为反应,同时研究了Bt玉米对中红侧沟茧蜂发育的影响。结果表明,两种玉米健康植株的挥发物对中红侧沟茧蜂均有引诱作用;中红侧沟茧蜂对两种玉米的健康植株及机械损伤株挥发物之间的选择性无显著差异;相对于Bt玉米,中红侧沟茧蜂更趋向于选择常规玉米的虫伤苗及玉米-粘虫幼虫-虫粪混合物的挥发物。与对照(寄生于取食常规玉米粘虫的中红侧沟茧蜂)相比,寄生于取食Bt玉米粘虫幼虫的中红侧沟茧蜂幼虫历期延长,出茧率、茧重、羽化率、蜂重均有显著降低,茧历期、蜂历期则差异不显著。     

乙烯对匍匐翦股颖ISR抗病反应中AsA-GSH循环及胼胝质沉积的影响

以匍匐翦股颖品种“Penn-A4”为试验材料,侵染立枯丝核菌后,经丁二醇(BDO)诱导产生系统抗性(ISR),喷施不同浓度的乙烯合成抑制剂氯化钴(CoCl₂)和促进剂1-氨基环丙烷羧酸(ACC)后,检测抗坏血酸-谷胱甘肽(AsA-GSH)循环中抗坏血酸(AsA)和还原型谷胱甘肽(GSH)含量及相关酶活性的变化,并观察匍匐翦股颖ISR反应中胼胝质沉积的变化。结果表明,乙烯抑制剂处理下,匍匐翦股颖幼苗中AsA含量较低,抗坏血酸过氧化物酶(APX)活性下降,大量GSH被催化还原为氧化型谷胱甘肽(GSSG),GSSG大量积累,同时谷胱甘肽还原酶(GR)活性较低,GSSG经GR少量还原为GSH。乙烯促进剂处理下,AsA含量较高,APX活性升高,GSSG在高活性GR作用下催化还原为GSH,使得GSH大量积累。因此在匍匐翦股颖ISR抗病反应中,高浓度乙烯促进AsA和GSH的大量积累,它们不仅参与了活性氧的代谢平衡,同时也作为信号分子在ISR抗病反应中起着重要作用。匍匐翦股颖感染褐斑病后,胼胝质主要沉积在厚壁细胞、韧皮部、木质部和表皮组织,其中厚壁细胞胼胝质沉积最多,表皮组织沉积最少。此外,胼胝质沉积面积在不同乙烯信号分子处理间存在差异,但随着处理时间的延长差异不显著。一定浓度的乙烯对ISR反应中胼胝质的沉积具有一定的影响,随着处理时间的延长显著增加,在100 μmol·L^-1ACC处理5 d后,胼胝质沉积总面积仅为9.916 mm²,处理10 d后升至最高,为38.396 mm²,但在病害侵染后期,胼胝质数量减少,在100 μmol·L^-1ACC处理15 d后,胼胝质沉积总面积降至20.052 mm²,反映了乙烯信号分子对胼胝质沉积的影响是一种短期效应,短期内可提高匍匐翦股颖植株抗病性,具有信号分子的短时效特点。研究结果为探清匍匐翦股颖ISR抗病响应中ET信号分子如何调控抗病生理特性提供了理论基础。     

Effects of zinc oxide nanoparticles on the egg quality,immune response,zinc retention,and blood parameters of laying hens in the late phase of production

The objective of this study was to evaluate the effects of dietary supplementation with zinc oxide nanoparticles (ZnO‐NPs) on the performance, egg quality, Zn retention, immunity responses, superoxide dismutase activity (SOD), egg malondialdehyde (MDA) content, and serum parameters in laying hens in the late phase of production. A total of 288 laying hens at 64 weeks of age were randomly assigned to 4 treatments with 6 replicates, and 12 birds within each group. Experimental diets included a corn‐soybean meal‐based diet (without Zn supplementation) and a basal diet supplemented with 80 mg/kg of Zn‐oxide, ZnO‐NPs, and Zn‐methionine. The results indicated that egg production and egg mass were significantly higher in the Zn‐methionine and ZnO‐NPs groups (p < .05). Also, eggshell thickness and shell strength increased in the ZnO‐NPs group as compared with the other groups (p < .05). Moreover, Zn supplementation decreased egg loss (p < .05). There were significant differences among treatments in Zn deposition in tibiotarsus, liver, pancreas, eggs, and excreta (p < .01). Antibody titre, heterophil (%(, and phytohemagglutinin (PHA) were significantly higher in birds fed with Zn‐supplemented diets (p < .05). In treatments supplemented with ZnO‐NPs and Zn‐methionine, the SOD activity in the liver, pancreas, and plasma was greater as compared with the other treatments (p < .05). The MDA content in eggs was significantly reduced in groups supplemented with Zn (p < .01). Moreover, dietary Zn supplementation significantly affected serum total protein, albumin, glucose, alkaline phosphatase activity, carbonic anhydrase activity, and Zn level (p < .05). In conclusion, this study demonstrated that dietary supplementation with ZnO‐NPs can improve the performance of laying hens. Therefore, ZnO‐NPs can enhance zinc absorption in the intestine of aged layers and can be a more suitable source of zinc than regular Zn‐oxide in diets.     

小兴安岭生态旅游产业转型中政府行为研究

立足小兴安岭生态旅游产业发展现状,分析政府"失当"行为带来的负面影响,提出推进生态旅游产业发展的对策,旨在通过政府行为的积极引导和支持,推动小兴安岭特色生态旅游的快速发展,进而更好地实现小兴安岭生态旅游产业转型。     

基于读者信息行为规律的信息服务管理策略

论述了网络环境下,高校图书馆读者信息行为规律的变化及共性特征,并进行了实证分析研究。在此基础上,提出了图书馆多样化、多元化、个性化和一站式的信息服务管理策略。     

原始云冷杉、红松林树木生长对氮沉降的响应

本文通过野外控制试验，设置4个梯度的施氮处理，分别为对照(CK，不加氮)、低氮(T_L，5 g/(m2·a))、中氮(T_M，10 g/(m2·a))、高氮(T_H，15 g/(m2·a))，研究云冷杉红松林主要树种的径生长对氮沉降增加的响应。结果表明，枫桦径生长随氮添加梯度的增加出现了先促进后抑制的趋势；臭冷杉和红松径生长随氮添加梯度的增加而受到抑制，其中臭冷杉表现出明显的衰退现象甚至死亡；花楷槭则表现出较为复杂的响应，可能与该树种对不同梯度氮添加的响应机制不同有关。同时还发现，各处理、各树种的胸径大小与径生长量存在相关性，可能与树种年龄及其所处的生态位相关。研究表明，氮沉降改变树木生长速率和死亡率，可能影响地上生态系统碳库和整个生态系统碳循环。      

房地产开发企业动态能力的维度结构与实证研究

羊群行为属于行为经济学的一部分，认为市场主体在信息环境不确定的情况下，其行为易受到其他参与主体的影响，模仿他人决策。基于Hwang和Samlton羊群行为测度方法（HS方法）及EGARCH模型，运用2003年1季度至2014年3季度我国30个省市房地产市场销售价格数据，验证我国房地产市场羊群行为的存在性，并分析购房者羊群行为对中国房地产价格波动的影响。结果表明：我国房地产市场羊群行为显著存在，且购房者羊群行为与房地产价格波动呈正相关关系。     

微信公共领域里的失范行为及其法治规范建设

从哈贝马斯公共领域理论出发，提出了微信群与微信公众号已经初步形成了公共领域这一观点，并主要介绍了围绕微信公共领域的社交功能、自媒体传播功能和商业贸易平台功能而产生的失范行为。依法规范微信公共领域，可以从完善依法管理微信公共领域、依法运营微信公共领域、依法使用微信公共领域三个有机联系层面的法治规范展开。