Prey capture and feeding behaviour in an endemic land flatworm from São Tomé Island

ABSTRACT

Two specimens of the endemic land flatworm species Othelosoma impensum Sluys & Neumann, 2017 from the volcanic island São Tomé were observed in the wild in Obo-National Park while they were preying on ants that had descended on a tree trunk after their nuptial flight. A maximum of 41 ants were assembled in a cluster by one of the flatworms, the insects being immobilised by mucus secreted by the worms. A strong cephalic retractor muscle facilitated capture of the mobile prey. Presence or absence of similar cephalic adaptations in other species of Othelosoma and other genera of land flatworms is discussed, as well as the effectiveness of the sticky mucus secreted by the worms during prey capture.     

围绝经期异常阴道流血病因分析（附198例病理报告）

目的 探讨围绝经期妇女异常阴道流血的病因。方法分析198例围绝经期异常阴道流血的子宫内膜和子宫颈组织病理检查结果。结果（1）围绝经期异常阴道流血的主要病因是功能失调性子宫出血（62．63％）。其子宫内膜的表现主要为增生过长（69.35％）。（2）肿瘤是围绝经期异常阴道流血的第二大发病原因（16．67％）,以子宫肌瘤常见。（3）妊娠性疾病的发病率较低（4．04％）。结论围绝经期妇女异常阴道流血的主要病因是性腺轴内分泌失调,同时注意排外肿瘤。     

A study of macromolecular diffusion through native porcine mucus

A diffusion chamber technique based on time-lag analysis for the estimation of effective diffusion coefficients of radiolabelled macromolecules of varying molecular weights through native mucus gel is reported. For all solutes studied, a reduction in effective diffusion coefficients was observed with a retardation of solute flux in both aqueus and mucus layers. Over the molecular weight range of solutes investigated (126–186 000 Daltons), a consistent effect of molecular weight was evident with regard to the retarding effect of mucus. No apparent or absolute molecular weight cut-off for macromolecular transfer was exhibited. However, at high molecular weights (>30 000 Daltons) the retardation was greatly enhanced. The results confirm that mucus can be regarded as a gel with finite pores, but that it does not constitute an absolute barrier to even high molecular weight solutes.     

母犬阴道角化上皮细胞与最适交配期的研究

实验用阴道涂片法检测经激素处理的空怀８个月和１年以上母犬，产后４５天、６０天、９０天诱导发情以及自然发情母大阴道角化细胞的变化，作为确定母犬最适交配时间的依据。结果表明：可依阴道涂片法确定母犬发情最适交配期，并以此作为检测指标之一用于生产实践．     

北极狐人工授精技术研究

报道了对北极狐用电刺激采精法采取精液 ;用粘液电测法 (用测情仪测定雌狐发情期阴道分泌物的电阻值 )确定最适输精时间 ;采用子宫内输精法对 8只雌狐实施人工授精、受胎率 5 0 %的初步试验结果及具体操作技术 .     

中西药结合治疗带下病100例

观察了运用自拟治带汤加减和佳丽康阴道泡腾片相结合治疗带下病的疗效.将270例带下病患者随机分为中西药结合、西药和中药3组进行治疗.中西药结合组运用自拟治带汤加减煎服,每日一剂,同时每晚睡前阴道内放置佳丽康阴道泡腾片1片;西药组口服替硝唑、阿莫灵或氧氟沙星等消炎药,并用同样方法放置佳丽康阴道泡腾片;中药组单用自拟治带汤加减煎服.3组均治疗10 d.中西药结合治疗组总有效率为99%,西药组总有效率为72.22%,中药组总有效率为76.25%(P＜0.05).中西药结合治疗带下病疗效优于单纯的西药或中药,值得临床广泛应用.     

乳牛的乳汁及宫颈粘液流变特性的研究及应用

本文研究了乳牛的乳汁及宫颈粘液的流变特性,得到了这两种体液的宏观流变模型。在跟踪乳牛发情和妊娠期以及考查牛奶成分和健康状况对其流变特性影响的基础上,试图建立两种定量流变学标准分别用于i)判断乳牛的发情和早期妊娠;ii)检验牛奶质量和营养价值以便研制牛奶质量快速测定仪。