泡沫比例混合器在液下喷射灭火系统中的应用

提出了环泵泡沫比例混合器和泡沫压力比例混合器在相应灭火系统中的应用、安装和操作中应注意的问题，对两种泡沫比例混合器组成的系统进行了对比，认为环泵比例混合泡沫灭火系统采用正压进水，可以克服负压进水方式存在的缺陷，比较适合油库火灾的扑救；压力比例混合泡沫灭火系统灵活性、匹配性较差，适用于泡沫混合液流量相对不变的火灾扑救。     

砂垫层基础的设计与施工措施

在各类工程中砂垫层的作用不同,作者对软弱地基在结构设计中采用砂垫层这一措施进行了详细叙述。     

The immunohistochemical detection of Mycoplasma bovis and bovine viral diarrhea virus in tissues of feedlot cattle with chronic, unresponsive respiratory disease and/or arthritis.

The purpose of this study was to determine the frequency of selected pathogens in the tissues of a group of feedlot cattle with chronic disease (most often respiratory disease and/or arthritis). Samples of lung and joint tissues from 49 feedlot animals that had failed to respond to antibiotic therapy were tested by immunohistochemical staining for the antigens of Mycoplasma bovis, Haemophilus somnus, Pasteurella (Mannheimia) hemolytica, and bovine viral diarrhea virus (BVDV). Mycoplasma bovis was demonstrated in over 80% of cases, including in 45% of joints and 71% of lungs tested. Mycoplasma bovis was the only bacterial pathogen identified in the joints. Haemophilus somnus and Pasteurella (Mannheimia) haemolytica were found in 14% and 23% of cases, respectively, and were confined to the lungs in all instances. Infection with BVDV was demonstrated in over 40% of cases. Mycoplasma bovis and BVDV were the most common pathogens persisting in the tissues of these animals that had failed to respond to antibiotic therapy.     

关于我国海水网箱养鱼发展现状与危机分析及可持续发展的探讨

我国海水网箱养鱼发展现状是以个体联合体生产经营为主体的低技术水平的数量规模化，众多传统港湾已形成了大范围的严重超负荷养殖状态，其对环境巨大的污染力引发鱼病猖獗和频受赤潮侵袭，已面临严峻的养殖环境危机。本文综合分析了我国海水网箱养鱼的发展现状与负面效应及其现状危机，并初步进行了危机根源和可持续发展的讨论分析。     

Enhancement of sulfide auto-oxidation by metal ion in artificial seawater and a seawater which is a possible source of aoshio

SUMMARY: Aoshio is hypoxic milky blue-green seawater observed in some eutrophic bays. Previous studies have shown that colloidal sulfur causes the coloration and that the source of aoshio water is attributed to coastal anoxic bottom water. Occurrences of aoshio have been reported in limited areas of coastal seawater, although hypoxic transparent water seems rather universal. Promotion in auto-oxidation of sulfide by metal ions in seawater was investigated to explain the occurrences of aoshio. Artificial seawater containing 10 μM metal ion was assayed for the sulfide oxidation rate. The velocity constant which represents the oxidation rate within the initial 30 min and the amount of reacted sulfide in 2 h were determined by oxygen monitoring and sulfide quantification, respectively. Fe²⁺ and Cu²⁺ enhanced the initial 30 min reaction. Fe²⁺, Fe³⁺ and Ni²⁺ increased the amount of reacted sulfide in 2 h, forming whitish turbid water. Seawater from a suspected source of aoshio water was also assayed for the auto-oxidation rate of sulfide. The oxidation rate in water from 12 m depth was 13–19 times higher than the artificial seawater without an addition of heavy metal ions. More than 15% of the oxidation rate in 12 m deep seawater was explained by dissolved iron in the seawater.     

槟榔红色素的抗氧化活性

测定槟榔红色素(areca red pigment,AP)对 DPPH·和·OH的清除能力、对脂质体过氧化的抑制能力、对Fe2+的络合能力,并测定其还原能力.结果表明:槟榔色素对DPPH·、·OH的清除能力较强:对脂质体过氧化的抑制能力很强,抑制率高达79.84%;与VE、没食子酸(gallic acid,GA)、BHT相比,槟榔色素的还原力、对Fe2+的络合能力较弱.说明槟榔红色素是较好的抗氧化剂.     

鼠李糖制备新工艺研究

采用正交设计方法探讨发酵法从芦丁水解液里提取制备鼠李糖的最佳制备工艺,优选出鼠李糖纯度达到99%以上的最佳制备工艺为:温度30℃,pH值5.0,酵母量为母液的2%。     

饲料企业降低沟通成本之浅见

在生产经营活动中．说到成本．人们大都会想到直接成本与间接成本．或生产成本与营销成本等有形成本．但有一类无形成本却往往容易被忽视，那就是沟通成本。沟通成本是指由于沟通不畅等原因造成的营运成本增加。由于其无形的特征．所以由它导致的成本上升很难用一个确切的数字来描述。我国饲料工业的历史不过20余年．即使是一些成功的饲料公司也难以通过根深蒂固的企业文化来规范员工的言行。加之缺乏诚信环境和市场不规范现象比比皆是．人员流动频繁，盈利导向至上，员工缺乏系统培训即上岗．唯亲是用等，这都或多或少导致了企业内部的信息与沟通不畅，甚至阻塞逆反．互相扯皮推诿，进而导致沟通成本上升，隐性费用增加，企业市场竞争力下降。     

仔猪初生重与产仔季节的相关性研究

实验以杜洛克×米猪杂交母猪为研究对象,采用大约克公猪配种,经2年研究分析了282窝3001头新生仔猪样本。结果表明:仔猪初生重呈现明显的季节性变化。春、夏、秋、冬出生仔猪的平均初生体重分别为1.101kg、1.049kg、1.152kg、1.163kg,其中春季和夏季分别显著低于秋季和冬季(P<0.05)。仔猪初生重的均匀度以春、冬季最佳。但供试母猪的妊娠期、产活仔数和初生窝重没有类似变化,提示仔猪初生重的这种季节性变化不是由这些因素所致,而很可能与不同季节的环境温度、光照周期以及动物的内分泌特点有关。子宫内生长阻滞(IUGR)的新生仔猪的比例在夏季为10.12%,显著高于秋季的4.83%(P<0.05),证明母猪妊娠后期的热应激会严重阻碍胚胎发育。