基于圈的多重完全图相关图的生成树数目

利用图G的标定技巧、矩阵和行列式运算、补生成树矩阵定理等理论,研究了当G是基于圈的多重完全图时,其补图类Kn—G的生成树数目的计数问题给出基于圈的多重完全图相关图Kn—G的一些特殊情况时生成树数目具体计数公式．     

海参防御机制的研究进展

海参乃棘皮动物门，海参纲动物的统称，全世界海参约有1200种。在我国海域分布的有140多种，其中品质最佳、药用价值最广的是产于中国辽宁、山东、河北等北太平洋沿海的仿刺参（Apostwhopus japonicus）。研究表明，在海参体壁中含有丰富的胶原成分和蛋白聚糖，并含有钙、镁盐及铁、锰等多种微量元素。     

不同品种的黄花菜鲜干花营养成分比较

采用国标测定方法，对不同品种的鲜黄花菜和干黄花菜的Ca，Fe，P，Mn维生素C等营养成分进行了分析比较。结果表明：鲜黄花菜的脂肪和维生素C含量高于干黄花菜，而蛋白质和其他微量元素的含量均低于干黄花菜，在所测定的4个品种中，冲天花和猛子花的蛋白质、糖类、Ca，Fe含量较高，且黄花菜的营养成分含量与香菇、木耳、冬笋的相比具有较大优势。     

中国夏季旱涝预测研究-现状与进展

根据作者提出的气候变化理论“冬季西风急流与夏季副热带高压的能量互补与平衡”对1997～2001年夏季旱涝进行了预测试验。5年的主要多雨带均与实际雨带吻合,准确率超过国内其他预报机构所作预报。     

中南穿梭育种对南斯拉夫玉米群体改良的互补性研究

198 5- 1997年对南斯拉夫玉米群体SYN1/ 9C0 进行半同胞轮回选择。 1998年通过把在唐山C1～C6和在贝尔格莱德进行C3～C6共计 10个轮回群体与 4个标准自交系进行半双列杂交研究 ,连续 2年试验 ,结果一致。研究结果表明对群体产量和测交组合产量以及产量杂种优势、配合力和田间部分性状一般配合力均存在显著差异 ,南斯拉夫和唐山两地改良效果极具互补性。实验表明 ,中南穿梭育种在提高南斯拉夫群体自身产量、测交组合产量的同时 ,能更为有效地提升群体杂种优势 ,使产量特殊配合力、一般配合力同时提高     

免疫多糖(酵母细胞壁)对中华鳖非特异性免疫功能的影响

报道了口服免疫多糖(酵母细胞壁)对中华鳖(Pelodiscus sinensis)非特异性免疫功能影响的研究结果。试验中共设6个组,在各组饵料中免疫多糖的添加量依次为每千克鳖重0 mg(对照组)5、00.0 mg(试验I组)、1 000.0 mg(试验Ⅱ组)、1 500.0 mg(试验Ⅲ组)2、000.0 mg(试验Ⅳ组)和2 500.0 mg(试验Ⅴ组)。投喂28 d后,取其血液,测定了中华鳖血液中白细胞的吞噬活性、血清溶菌活力和补体活性。研究结果表明,试验I~Ⅲ组中华鳖白细胞吞噬活性和溶菌酶的活性均显著高于对照组(t测验,P<0.05),而试验Ⅳ组和Ⅴ组与对照组中华鳖血液中白细胞的吞噬活性和溶菌酶活性没有显著差异(t测验,P>0.05),补体C3和C4活性最高的是投喂量为每千克鳖重1 000.0 mg和1 500.0 mg的第Ⅱ组与第Ⅲ组,2个组与对照组间存在显著差异(t测验,P<0.05),而第Ⅰ组、第Ⅳ组和第Ⅴ组与对照组之间无显著性差异(t测验,P>0.05)。研究结果证明在中华鳖饵料中添加免疫多糖(酵母细胞壁)的量以每千克鳖重1 000.0 mg左右为宜,超过1 500.0 mg对中华鳖的免疫刺激作用会逐渐降低。     

Enhancement of non‐specific immune responses and disease resistance on oral administration of Nyctanthes arbortristis seed extract in Oreochromis mossambicus (Peters)

The immunomodulatory effect of the seed extract of an Indian medicinal plant Nyctanthes arbortristis L. (NAT) on non‐specific immune responses and disease resistance of tilapia, Oreochromis mossambicus was investigated. Chloroform extract was administered orally as a feed supplement at doses of 0.01%, 0.1% or 1% for 3 weeks. Non‐specific immune parameters such as serum lysozyme and alternate complement haemolytic (ACH₅₀) activities, and cellular reactive oxygen species (ROS), reactive nitrogen intermediate (RNI) and myeloperoxidase production and disease resistance against live virulent Aeromonas hydrophila were investigated after 1, 2 or 3 weeks of feeding with chloroform extract‐supplemented diet. The results of this study indicated that feeding tilapia for 2 weeks with selected doses of chloroform extract of NAT seeds significantly enhanced serum lysozyme, alternate complement activities and cellular ROS, RNI and MPO production. It was evident from the disease resistance test that feed supplemented with NAT seed extract at 0.1% or 1% level significantly reduced the mortality of O. mossambicus and a 3‐week feeding with 0.1% extract‐supplemented diet appears to be the optimal regimen for maximal disease resistance. Thus, the study indicates the scope of using the NAT extract as an immunoprophylactic in finfish aquaculture.     

犊牛注射佐剂后血清中抗体的测定

３０头５日龄犊牛腹膜腔内注射自制的油包水佐剂，１４天后，应用补体结合反应与双相琼脂扩散反应，检测犊牛血清中的抗体浓度。结果表明，试验组犊牛血清中的抗体浓度均比对照组高７．５－８个滴度，呈现免疫有效。     

In vitro effects of plant essential oils on non‐specific immune parameters of red drum,Sciaenops ocellatus L.

Phytochemicals such as plant essential oils (EOs) have been reported to favour various activities in the innate immune system of fish. Thus, the aim of this study was to verify the in vitro effect of three different plant EOs (Ocimum americanum, Cymbopogon flexuosus and Melaleuca alternifolia) on non‐specific immune parameters and erythrocyte osmotic fragility of red drum, Sciaenops ocellatus. Concentrations of each plant EO evaluated in preparations of head‐kidney macrophages, blood leucocytes and blood plasma were as follows: 0.0 (control), 1.0, 2.0, 4.0, 8.0, and 16.0 μg/ml. Red drum head‐kidney macrophages significantly increased extracellular superoxide anion production when exposed (20 h) to O. americanum EO (1.0‐8.0 μg/ml) and C. flexuosus EO (2.0 and 4.0 μg/ml). The respiratory burst of blood leucocytes (NBT test) significantly increased in all concentrations when compared to the respective control group, for all EOs. At the highest concentration (16.0 μg/ml), C. flexuosus EO significantly inhibited the haemolytic activity of complement system in red drum blood after 1 h exposure. None of the tested concentrations significantly altered plasma lysozyme activity or erythrocyte osmotic fragility after exposing (1 h) red drum whole blood to each EO. This study demonstrated that these plant EOs are capable of triggering superoxide anion production in red drum leucocytes (head‐kidney macrophages and/or blood leucocytes). In vivo studies are warranted to address their potential as immunostimulants in the diet of red drum and other aquacultured species.     

对似德治国”方略的几点认识

新形势下贯彻落实江泽民同志‘以德治国”的思想，应全面深刻地理解‘以德治国”的理论基础、现实意义;在建立社会主义市场经济体制过程中，要进一步弘扬中华民族优良传统道德，积极构建社会主义新道德体系,把以德治国与依法治国紧密结合起来。