周期变温和后期通氮气或二氧化碳发酵对提高甘油产量的影响

Effects of periodic temperature variation on glycerol fermentation by osmophilic yeast was discussed.At the same time,glycerol fermentation by periodic temperature variation,constant temperature,aerating nitrogen or carbon dioxide during the later stage were compared.The result showed that glycerol yield by periodic temperature variation fermentation was higher than that by constant temperature fermentation and an appropriate temperature oscillatory range was 35-45?℃.During the later stage of constant temperature fermentation,when fermentation time was 72?h,glycerol yield was the highest.After that,glycerol yield began to reduce and glycerol began to be consumed.Then,nitrogen gas or carbon dioxide was sparged in fermentation medium to ferment glycerol unceasingly,which can decrease residual sugar,increase glycerol yield further and avoid glycerol being consumed.Moreover,during the later stage of glycerol fermentation,glycerol yield by sparging nitrogen gas was higher than that by sparging carbon dioxide.

B超诊断幼女卵巢恶性畸胎瘤1例

笔者下旗县体检期间遇到一患儿，女，4岁。2个月前，该患儿父母无意中发现患儿腹部有一鸡蛋大小肿物，能活动，曾以盆腔囊肿服用中药无效，近几天患儿腹部增大显著。该患儿既往体健，自发现肿物以来，精神饮食尚可。

在孕中期对孕妇及胎儿进行超声筛查的价值分析

目的:探讨在孕中期对孕妇和胎儿进行超声筛查的价值。方法:选取2013年1月至2014年6月期间在我院对胎儿进行超声筛查的3026例孕中期孕妇作为研究对象。对所有孕中期孕妇及胎儿进行超声筛查,观察胎儿的声像特征,判断胎儿的发育情况。结果:经超声筛查发现,在这些孕妇及胎儿中,有畸形胎儿62例,其畸形率为2.05%。这些胎儿的畸形类型有积血流舒张期消失、唇腭裂、肾脏异常、心脏异常、四肢异常、腹腔囊肿、单脐动脉、胼胝体发育不良、腹水、永久性右脐动脉、NT增厚、发育迟缓、十二指肠闭锁、肛门闭锁、双胎输血综合征。结论:在孕中期对孕妇级胎儿进行超声筛查可观察到胎儿各个部位和器官的发育情况,能在早期发现异常胎儿,及时采取相应的处理措施,提高人口的出生质量。

超声产前结构筛查的意义

目的:探讨产前实施超声结构筛查的临床意义。方法:将2012年1月—2016年1月我院收治的12455例孕16周～足月孕妇为研究对象,所有孕妇均给予超声产前结构筛查,观察其阳性比率并探讨超声产前结构筛查在其中的临床意义。结果:12455例孕妇筛查结果显示,心脏异常、肾脏异常、单脐动脉、唇腭裂和颈部淋巴水囊瘤占比最高。结论:实施超声产前结构筛查可以有效的检出高危胎儿,对于保证母婴健康有着重要意义。