African catfish Clarias gariepinus brood stocks were bred by normal induced breeding method, After fertilization, the eggs were treated with 0.40%, 0.50% and 0.60% concentration levels of MS （methylated spirit） and ...African catfish Clarias gariepinus brood stocks were bred by normal induced breeding method, After fertilization, the eggs were treated with 0.40%, 0.50% and 0.60% concentration levels of MS （methylated spirit） and a control treatment without MS （0%）. The objective was to remove the stickiness of the egg outer vitelline membrane to improve hatchability and survival of the hatchlings. Two batches of the treatments were carried out according to treatment duration of 5 s and l0 s. The eggs hatched normally with the highest hatching percentage of 62.31% in eggs treated with 0.40% MS concentration in 5 s treatment and 61.92% in the same concentration for 10 s. The control treatment of 0.00% MS treatment gave the lowest hatchability of 49.69% at 5 s and 45.71% at 10 s exposure time. Growth performance of the hatchlings improved in eggs treated than those not treated. Those treated had higher weight gain and percentage specific growth rates than those not treated. Percentage survival ranged from 75% to 90 % in both treated and untreated groups. MS can therefore be safely used in fish hatchery to prevent egg stickiness to improve hatchability and larval development.展开更多
反应器内合金化技术生产高抗冲聚丙烯(hi PP)过程中,目前工业上普遍采用加入低纯氮(LPN)的方式阻止聚丙烯颗粒表面生成乙丙橡胶的防粘策略,限制了乙烯含量的提高,使得其抗冲性能受到一定的制约。提出了一种在共聚气相釜中原位添加极少量...反应器内合金化技术生产高抗冲聚丙烯(hi PP)过程中,目前工业上普遍采用加入低纯氮(LPN)的方式阻止聚丙烯颗粒表面生成乙丙橡胶的防粘策略,限制了乙烯含量的提高,使得其抗冲性能受到一定的制约。提出了一种在共聚气相釜中原位添加极少量(<0.1%)超细粉体的方法,通过局载化于聚丙烯颗粒表面,从而起到替代低纯氮的作用,并能通过物理阻隔的方式进一步防止颗粒间发黏聚并,成功将其运用于Hypol工艺,制得高乙烯含量(>20%)且流动性良好的hi PP。同时,将产物与传统低纯氮体系的进行比较,其常温抗冲性能由36.44 k J·m?2升至60.56 k J·m?2,低温抗冲性能由14.78 k J·m?2升至35.12 k J·m?2,体现出其优异的常温和低温抗冲性能。展开更多
我国肝癌患者就诊时多数处于中晚期.联合肝脏离断和门静脉结扎的二步肝切除术(associating liver partition and portal vein ligation for staged hepatectomy,ALPPS)是当前的创新手术方式,国外多用于治疗无肝病基础的巨大或多发的转...我国肝癌患者就诊时多数处于中晚期.联合肝脏离断和门静脉结扎的二步肝切除术(associating liver partition and portal vein ligation for staged hepatectomy,ALPPS)是当前的创新手术方式,国外多用于治疗无肝病基础的巨大或多发的转移性肝癌的治疗.本例用ALPPS成功地治疗合并较重肝硬化的巨大肝细胞癌.介绍了术中联合防黏连膜肝周隔绝和肝动脉和门静脉放置治疗泵,经治疗泵注射含血管内皮抑素化疗栓塞乳剂防治肿瘤复发的方法.随访3 mo未见复发.展开更多
文摘African catfish Clarias gariepinus brood stocks were bred by normal induced breeding method, After fertilization, the eggs were treated with 0.40%, 0.50% and 0.60% concentration levels of MS （methylated spirit） and a control treatment without MS （0%）. The objective was to remove the stickiness of the egg outer vitelline membrane to improve hatchability and survival of the hatchlings. Two batches of the treatments were carried out according to treatment duration of 5 s and l0 s. The eggs hatched normally with the highest hatching percentage of 62.31% in eggs treated with 0.40% MS concentration in 5 s treatment and 61.92% in the same concentration for 10 s. The control treatment of 0.00% MS treatment gave the lowest hatchability of 49.69% at 5 s and 45.71% at 10 s exposure time. Growth performance of the hatchlings improved in eggs treated than those not treated. Those treated had higher weight gain and percentage specific growth rates than those not treated. Percentage survival ranged from 75% to 90 % in both treated and untreated groups. MS can therefore be safely used in fish hatchery to prevent egg stickiness to improve hatchability and larval development.
文摘反应器内合金化技术生产高抗冲聚丙烯(hi PP)过程中,目前工业上普遍采用加入低纯氮(LPN)的方式阻止聚丙烯颗粒表面生成乙丙橡胶的防粘策略,限制了乙烯含量的提高,使得其抗冲性能受到一定的制约。提出了一种在共聚气相釜中原位添加极少量(<0.1%)超细粉体的方法,通过局载化于聚丙烯颗粒表面,从而起到替代低纯氮的作用,并能通过物理阻隔的方式进一步防止颗粒间发黏聚并,成功将其运用于Hypol工艺,制得高乙烯含量(>20%)且流动性良好的hi PP。同时,将产物与传统低纯氮体系的进行比较,其常温抗冲性能由36.44 k J·m?2升至60.56 k J·m?2,低温抗冲性能由14.78 k J·m?2升至35.12 k J·m?2,体现出其优异的常温和低温抗冲性能。
