p65 Homodimer activity in distal airway cells determines lung dysfunction in equine heaves

Nuclear factor-κB (NF-κB) activity, which is a key regulator of inflammatory gene expression, is increased in bronchial epithelial cells from horses suffering from heaves (a hypersensitivity-associated inflammatory condition of the lung). To determine whether this increased activity extends to distal airways and to other pulmonary cells, cells recovered by broncho-alveolar lavage (BAL) in healthy and heaves-affected horses were assessed for NF-κB activity. NF-κB activity was much higher in BAL cells from heaves-affected horses, especially during crisis (disease exacerbation), than in cells from healthy horses. Moreover, the level of NF-κB activity found in BAL cells was positively correlated to total lung resistance and to the proportion of neutrophils present in BAL fluid. Finally, prototypical p65–p50 NF-κB heterodimers were absent from BAL cells, which mostly contained p65 homodimers. These results (1) show that increased NF-κB activity is a general feature of heaves lung; (2) demonstrate the importance of p65 homodimers in neutrophilic inflammation; and (3) suggest that the use of specific NF-κB inhibitors could improve lung function in heaves-affected horses.     

丰宁木本植物资源调查报告

丰宁满族自治县为河北省重点林业县之一。为使林业打破以往单纯生产原木的旧格局,走立体开发综合利用的新路,县林业局与河北林学院组成联合调查组,对该县重点山区进行了树木资源调查,共采集标本2000余号。经整理鉴定,现知全县木本植物有243种(包括种下等级),隶属于45科,91属。根据调查资料,本文就该县木本植物组成、区系概况、分布及其开发利用等进行了总结分析.     

RTK联合全站仪在南川石漠化地区测图中的应用分析

以南川石漠化山区地形测图为例,对实时载波相位差分技术(RTK)联合全站仪进行数字化测图的作业流程、控制点精度进行分析,指出RTK与全站仪的有效结合,不但可以提高速度、节约时间、节约人力、财力,而且可以保证测图的精度.     

应用遥感技术研究厦门市热岛效应与植被覆盖的关系

为了探讨厦门市城市热岛效应与地表植被覆盖的关系，针对厦门市森林生态网络体系建设的内容，利用卫星遥感资料为数据源，以地理信息系统为分析平台，对厦门市的热环境进行了研究。结果表明：把森林引入城市，建立以森林为主体的厦门市森林生态网络体系，加大植覆盖与水面面积，是改善城市热岛效应，提高厦门市森林生态网络体系建设质量的一个重要措施。     

土壤微量元素研究 Ⅳ.碳酸钙对土壤中加入锌的形态转化的影响

本试验采用土壤恒温恒湿培养和土壤中锌的分组方法,研究碳酸钙对土壤中加入锌的形态转化以及 pH 值的影响,进而探讨碳酸钙对有效锌的影响。试验结果证明:碳酸钙可引起土壤pH 值上升,交换态锌下降以及碳酸盐结合态锌增加,从而使有效锌降低。在 CaCO_2含量1%左右时,各种形态锌分布及 pH 值对 CaCO_2增加较为敏感;在1%～7%时,其变化比较缓慢。     

运用回归方法研究汕优63优化配套

本文根据二次曲面混合设计法进行田间试验,研究了杂交水稻汕优63的种植密度(X_1)、施N肥量(X_2)和秧苗带蘖数(X_3)与产量(y)之间的关系.其回归方程为: ■=455.27 + 11.86X'_1 + 14.4X'_2 + 8.89X'_3 + 7.05X'_2·X'_3 - 9.06(X'_2)~2 - 13.8(X'_3)~2 (R=0.9843,S=13.80 X_i~'=x_i-mic x_i·[4-2]/max x_i-mic x_i)结果表明,在本实验条件下,获得高产的最佳组合是:栽植密度为2万窝/亩,施N肥量为10.3kgN/亩和2.62蘖/株.并且,与大田生产实际有相当高的吻合度.     

森林培育专家决策支持系统的研究

系统地分析了林农的需求,利用现代信息技术集成森林培育与管护、森林病虫害防治、林木收获利用等整个森林的经营管理全过程中的相关技术手段和知识,研建森林培育专家决策支持系统,为森林培育全过程提供专业技术支持。森林培育专家决策支持系统采用"平台+模块+客户化开发"的思想,基于B/S体系结构,建立了森林培育专家决策支持系统的通用框架以适应不同地区的需求。给出了系统结构和总体功能结构设计,对森林培育专家系统和森林病虫害诊治专家系统的框架、知识库与推理机进行了详细设计。该研究成果在"十一五"国家科技支撑计划课题"速生丰产林生产经营过程信息化关键技术研究与应用"的产品"森林培育专家决策支持系统"中进行了应用,取得了满意的结果。     

RELEVANCE OF A RAPID APPRAISAL APPROACH TO IDENTIFY LOCALLY AVAILABLE FEED INGREDIENTS TO SMALL-SCALE NILE TILAPIA (Oreochromis niloticus L.) AQUACULTURE

Applications of a rapid appraisal approach to identify locally available feed ingredients in feed formulation, production, and socio-economics of Nile tilapia aquaculture in Bangladesh are discussed. Three diets of 35%, 30%, and 25% crude protein were formulated using locally available ingredients, and their essential amino acid profiles were assessed for Nile tilapia. Six production scenarios were constructed using these diets and two culture periods of 100 and 150 days were considered. The production scenarios with 35% protein yielded the highest productivity and profitability over the 150-day culture period followed by the 30% protein scenario. Identification of locally available ingredients and their application in small-scale Nile tilapia aquaculture may lead to: (1) increased availability of inexpensive sources of fish production for poor people; (2) increased fish consumption; (3) increased self employment and involvement of women in productive activities; and (4) increased household income to reduce poverty.     

A novel enzymatic pre‐treatment improves amino acid utilization in feather meal fed to rainbow trout (Oncorhynchus mykiss)

A growth trial followed by a digestibility trial were conducted to assess the bioavailability of arginine (Arg) and amino acid digestibility of two feather meals (FeMs) and their pre‐treated counterparts (PTFeMs). Two FeMs, identified as FeM1 and FeM2, were incubated in 200% distilled water (%FeM w/w), with 0.05% of Savinase^® 16L (%FeM v/w) and 2% sodium sulphite (%FeM w/w) at 55ºC for 24 hr in a shaking incubator to produce PTFeM1 and PTFeM2 respectively. A basal diet, highly deficient in Arg (12.0 g/kg Arg) was formulated and 10 other diets were formulated to contain 13.5 or 15.0 g/kg Arg by adding increasing amounts of L‐Arg, FeMs or PTFeMs. The experimental diets were fed for 8 weeks using a standard protocol. At 13.5 g/kg Arg, the PTFeMs supported 10.5% to 11.5% higher growth rates (p < 0.05) than their untreated counterparts. The diets formulated with PTFeMs presented 3.5%–4.5% and 2.7%–5.9% higher (p < 0.05) apparent digestibility coefficients of protein when compared to the diets containing the FeM counterparts at 13.5 and 15.0 g/kg Arg respectively. The results from this study demonstrate the potential of the pre‐treatment to improve the nutritive value of FeMs in rainbow trout.     

大兴安岭西林吉林业局主要林业有害生物初步调查

本文对大兴安岭西林吉林业局内主要的林业有害生物进行了初步的调查,结果表明,该地区的主要林业有害生物种类为兴安落叶松鞘蛾(Coleophora obducta(Meyrick))、落叶松球蚜(Aaetges laricis Vallost)、桦尺蛾(Biston betularia(Linnae-us))、云杉小黑天牛(Monochamus sutor Linnaeus)、落叶松八齿小蠹(Ips subelongatus Motsehulsky)、云杉八齿小蠹(Ips typogra-phus Linnaeus)以及落叶松球果花蝇(Strobilomyia laricicola(Karl)),对其分布与危害、生活习性以及发生规律进行了简要记述,并提出了主要的防治措施。