Isolation of cellulose—producing microbes from the intestine of grass carp (<Emphasis Type="Italic">Ctenopharyngodon idellus</Emphasis>)

The cellulase activities of bacterial strains in the intestine of grass carp were analyzed, using filter paper and absorbent cotton as substrates and measuring the concentration of glucose by calorimetry. Six strains were isolated and determined high cellulase activity in all grass carp. Strains showed different abilities to produce cellulase, which suggests that they interact in the grass carp intestine to digest cellulose. The presence of cellulose activity suggests that grass carp have the ability to digest cellulose in the diet. The cellulase enzymatic activity increased dramatically after 6 days of culture and reached its peak at the 7th day. Microbes are probably the main source of cellulase in grass carp diets.     

笼养海南(开鸟)的活动时间分配

2003年10月至2004年4月,在对海南[开鸟]进行驯养的基础上,采用全部事件取样法研究了笼养海南[开鸟]的活动时间分配。结果表明：笼养海南[开鸟]一天中除静栖和静立外,其余各行为所占时间比例在白天极少,而在晨（5：00～7：00am）、昏（19：00～21：00pm）和午夜（23：00～1：00am）较大,呈明显的日活动节律;节律变化与季节有关;海南[开鸟]各种行为活动所占比例依次为静栖82．48％、静立8．64％、运动5．36％、取食1．97％、身体护理1．30％、其它0．25％。其时间分配不受季节（春、秋、冬季）影响。     

不同三尖瓣成形术治疗风湿性二尖瓣病变合并三尖瓣关闭不全临床研究

目的:比较行不同成形术治疗风湿性二尖瓣病变合并功能性三尖瓣关闭不全的外科疗效。方法:选取风湿性二尖瓣病变合并功能性三尖瓣关闭不全患者119例,按照治疗方法将患者分为对照组、三尖瓣人工环植入成形术组(成形环组)以及三尖瓣缝线成形术(缝线组),分别统计患者年龄、性别、手术方式、术前及术后心功能分级等指标,采用t检验对患者术前、术后2周以及术后6个月心脏各腔内径进行统计学分析。结果:患者行三尖瓣人工环植入成形术以及三尖瓣缝线成形术治疗后,心脏各腔内径均明显缩小,成形环组患者术后心脏内径缩小最显著,行三尖瓣缝线成形术患者次之。术前成形环组左心房、右心房以及右心室内径较对照组扩大明显(P0.05);术前缝线组左心房、右心房以及右心室内径较对照组扩大明显(P0.05);术前成形环组与缝线组右心房、右心室内径组间无明显差异;术后2周以及术后6个月三组间左心房内径无明显差异(P0.05)。术后2周成形环组以及缝线组右心房以及右心室内径仍大于对照组(P0.05),术前成形环组与缝线组组间无显著差异。术后6个月成形环组右心房以及右心室内径较缝线组显著缩小(P0.05),成形环组和对照组间无明显差异。结论:治疗风湿性二尖瓣病变合并功能性三尖瓣关闭不全的方法中,三尖瓣人工环植入成形术效果优于三尖瓣缝线环缩术。