银川阅海公园水生植物园规划

银川阅海湿地公园是国家级湿地公园,对银川阅海公园水生植物园的规划建设,可以完善阅海湿地公园的整体布局、功能及生态系统,促进银川阅海公园生态与经济的和谐发展。同时本项目的规划建设对提高银川地区水生植物资源的开发利用、保护生物多样性、扩大银川阅海公园的知名度将产生积极而深远的影响。     

园林观赏植物几种扦插繁殖试验

本试验采用嫩枝扦插法繁殖园林观赏植物,以不同基质和植物生长调节剂ABT生根粉、1-NAA、吲哚-3-丁酸,其中ω(1-NAA):ω(吲哚-3-丁酸)=1∶1为混合处理试剂.混合处理试剂,以不同质量分数配成的溶液处理插穗,通过分析扦插基质对插穗生根的影响以及不同植物生长调节剂的不同质量分数对插穗生根的影响,结果表明:1-NAA和吲哚-3-丁酸的混合试剂以100倍质量分数处理的金叶小檗插穗在蛭石中扦插长势最好;经ABT生根粉处理的插穗在蛭石中扦插以1/7 000的质量分数处理较好;经1-NAA处理的插穗在蛭石中以250倍质量分数处理较好;经吲哚-3-丁酸各质量分数处理的插穗在蛭石中扦插均表现不理想.为此总结出不同植物快速有效的扦插技术,采用此技术推广繁育上述植物,可增加银川地区园林绿化植物种类,提升园林绿化景观,改善城市生态环境.     

Role of PKG-L-type calcium channels in the antinociceptive effect of intrathecal sildenafil

Sildenafil increases the cyclic guanosine monophosphate (cGMP) by inhibition of a phosphodiesterase 5, thereby leading to an antinociceptive effect. The increased cGMP may exert the effect on an L-type calcium channel through the activation of protein kinase G (PKG). The purpose of this study was to examine the possible involvement of a PKG-L-type calcium channel on the effect of sildenafil at the spinal level. Catheters were inserted into the intrathecal space of male SD rats. Pain was induced by applying 50 µL of a 5% formalin solution to the hindpaw. The sildenafil-induced effect was examined after an intrathecal pretreatment of a PKG inhibitor (KT 5823), or a L-type calcium channel activator (FPL 64176). Intrathecal sildenafil produced an antinociceptive effect during phase 1 (0~10 min interval) and phase 2 (10~60 min interval) in the formalin test. Intrathecal KT 5823 and FPL 64176 attenuated the antinociceptive effect of sildenafil during both phases. Sildenafil is effective against both acute pain and the facilitated pain state at the spinal level. In addition, the inhibition of an L-type calcium channel by activation of the PKG may contribute to the antinocieptive mechanism of sildenafil in the spinal cord.     

Field trial of praziquantel for control of fishborne zoonotic trematodes in reservoir hosts in Vietnam

This field trial was conducted to determine whether 40 or 75 mg/kg of praziquantel is suitable for treatment of fishborne zoonotic trematodes (FZT) in naturally infected dogs (n=10) and cats (n=11). Three days after treatment all animals at either dose were negative for small trematode eggs. In two cats and one dog treated with 75 mg/kg, however, a few damaged eggs were found 3 days post-treatment; no small trematode eggs were seen in these animals at day 14 post-treatment. In addition, at the 75 mg dose, two cats and two dogs experienced vomiting or diminished appetite. Therefore a praziquantel dose of 40 mg/kg is suggested for treatment of FZT in dogs and cats.     

A new cytotoxic guaianolide from Chrysanthemum boreale

A new cytotoxic guaianolide was isolated from Chrysanthemum boreale Makino. The structure of guaianolide was elucidated as 8-acetoxy-4,10-dihydroxy-2,11(13)-guaiadiene-12,6-olide (1). Compound 1 exhibited cytotoxic activity (IC(50)< or =4 microg/ml) against all five human cancer cell lines tested.     

露地黄瓜新品种‘津优40 号’

 ‘津优40 号’黄瓜以高代稳定自交系母本B8231 和父本48 杂交而成。该一代杂种生长势强, 瓜的商品性好, 畸形瓜率低, 耐高温。果肉淡绿色, 质脆, 味甜; 抗霜霉病、白粉病和枯萎病, 适合露地栽培。     

雪鸡肉氨基酸和微量元素含量分析

通过雪鸡肉的氨基酸和微量元素等成分测定表明：雪鸡肉中的氨基酸含量丰富，总合百分含量最高达２２．２１％。养殖的雪鸡肉中氨基酸总合百分含量比野生雪鸡还高２．３４％。四种微量元素的含量，二者差异不显著。     

Antiviral effect of Saccharomyces cerevisiae beta-glucan to swine influenza virus by increased production of interferon-gamma and nitric oxide

The aim of these experiments was to investigate the potential antiviral effect of Saccharomyces cerevisiae beta-glucan on the pneumonia induced by swine influenza virus (SIV). Forty colostrum-deprived 5-day-old piglets were randomly divided into four groups of 10. The 20 pigs in groups 1 and 2 were administered Saccharomyces cerevisiae beta-glucan orally (50 mg/day/pig; En-Bio Technology Co., Ltd) for 3 days before SIV infection and those in groups 3 and 4 were given culture medium/diluent alone. Groups 1 and 3 were inoculated intranasally with 3 ml of tissue culture fluid containing 2 x 10(6) tissue culture infective doses 50% (TCID(50))/ml of SIV and those in groups 2 and 4 were exposed in the same manner to uninfected cell culture supernatant. The microscopic lung lesions induced by SIV infection (group 1 pigs) were significantly more severe than those induced by infection in animals pre-administered beta-glucan (group 3) (P < 0.05). Significantly more SIV nucleic acid was detected in the lungs of pigs experimentally infected with SIV only (group 1) at 5, 7 and 10 days post-inoculation (dpi) compared with lungs from pigs pre-administered beta-glucan and infected with SIV (group 3) (P < 0.05). The concentrations of interferon-gamma (IFN-gamma) and nitric oxide (NO) in bronchoalveolar lavage fluid from pigs pre-administered beta-glucan and infected with SIV (group 3) were significantly higher than for any other group at 7 and 10 dpi for IFN-gamma, and at 5, 7 and 10 dpi for NO (P < 0.05). Saccharomyces cerevisiae beta-glucan reduced the pulmonary lesion score and viral replication rate in SIV-infected pigs. These findings support the potential application of beta-glucan as prophylactic/treatment agent in influenza virus infection.