Effect of steam cooking on distribution of paralytic shellfish toxins in different tissue compartments of scallops Patinopecten yessoensis

This study investigated the effect of steam cooking on distribution of paralytic shellfish poisoning toxins (PSP-toxins) in scallops Patinopecten yessoensis. Toxins analysis by high-performance liquid chromatography showed that most of the PSP-toxins (>70%) were accumulated in viscera and adductor muscle of the raw scallops. Steam cooking induced significant loss (p < 0.05) of PSP-toxins from viscera (16%), adductor muscle (24%), gill and mantle (11%) while 32% of the toxins were retained inside viscera and adductor muscle. Overall, 51% of PSP-toxins leaked out from scallop tissues during steam cooking. However, there was no significant loss (p > 0.05) of PSP-toxins from gonad. Consumption of viscera was the most significant risk factor for causing PSP, while gonad and scallop soup were the second most significant. A rapid PSP test further verified detectable levels of PSP-toxins in all samples. However, possible interfering substance(s) in adductor muscles and gonads might potentially affect the results from this test.     

熔融金属喷射沉积技术的发展与应用

喷射沉积是１种快速凝固材料制备新技术。本文叙述该技术的产生及应用发展和原理。在贵金属材料领域将有重要的应用 。     

Fabrication and characterization of a Ni-YSZ anode support using high-frequency induction heated sintering (HFIHS)

Ni-YSZ cermet anode supports solid oxide fuel cells (SOFCs) were fabricated by high-frequency induction heated sintering (HFIHS) under 60 MPa pressure with powders synthesized by the glycine nitrate process (GNP) as well as mechanically mixed commercial powders. The HFIHS method created a uniformly porous microstructure without abnormal grain growth compared to the conventional sintering method. Samples sintered by HFIHS show higher strength and electrical conductivity than conventionally sintered samples, even though they have similar porosity.     

高光注塑成型产品质量的评价体系

介绍了高光注塑成型技术原理,构建了高光注塑成型产品必须满足的传统注塑成型产品质量的评价体系,并着重介绍了表面光泽度、熔接线、表面浮纤和表面硬度等高光注塑成型产品的主要评价项目。     

排采连续性对煤层气开采的影响

排采连续性对煤层气开发至关重要.但是,在排采过程中关井现象不可避免,重新开井后如何排采、制定合理的排采制度是提高产量的关键.通过对煤层气生产阶段理论进行分析,结合关井前后矿场数据,同时借助数值模拟方法,对关井过程中储层参数变化进行了研究.结果表明,关井明显改变储层物性参数,造成井筒附近煤层含水饱和度增加,井底压力升高,...     

快速退火Sol—Gel PZT铁电薄膜的性能研究

报道了以乙酸铅、乙酸氧锆和钛酸正丁酯为原料，用溶胶-凝胶（Sol-Gel）法，经多次旋转涂膜，在Pt／Ti／SiO2／Si衬底上制备了PZT凝胶薄膜。用快速退火（RTA）作薄膜的热解和结晶热处理，制备了以（100）取向为主的PZT薄膜。用X射线衍射（XRD）和RT66A测试了膜的结晶取向、漏电流、电滞回线和抗疲劳性能等。结果表明，经RTA处理的溶胶凝胶法PZT膜具有良好的性能。     

真丝绸新型快速精练剂与应用工艺

介绍了ZS系列丝素保护快速精练剂的应用范围和性能，并与国内外常用精练剂作了对比试验。结果表明；它能保护真丝绸在碱性条件下的强力不受损伤；若采用合适的工艺条件．能缩短精练时间，提高产品质量，降低成本，提高生产效率。     

快速凝固热强Al-4Ti-2V-3La合金的显微结构和力学性能的研究

采用金相（ＯＭ）、透射电镜（ＴＥＭ）、扫描电镜（ＳＥＭ）等先进技术研究了快速凝固Ａｌ－４Ｔｉ－２Ｖ－３Ｌａ合金，确定了基体中弥散分布的细小强化相为单一的Ａｌ２０（Ｔｉ，Ｖ）２Ｌａ相，结构为金刚石立方结构，晶格常数ａ＝１．４７ｎｍ。该性能接近当前较成熟的热强铝合金，说明快凝Ａｌ－Ｔｉ－Ｌａ基合金作为热强铝合金具有潜在的实力。     

Rapid Desensitization of Lipolysis in the Visceral and Subcutaneous Adipocytes of Rats

In adipocytes, short and long term stimulation of β adrenergic receptors (βAR) induces the desensitization to catecholamines, leading to a decrease in the intracellular accumulation of cAMP, but the roles played by this in lipolysis is not clear. In this study, we assessed the catecholamine-induced desensitization of lipolysis and compared this in adipocytes isolated from visceral and subcutaneous fat tissues of rats. When adipocytes were pretreated with isoproterenol (ISO), the norepinephrine (NE)-induced lipolysis was significantly reduced dose- and time-dependently. A similar reduction of the lipolytic response was also found in NE-, dobutamine-, terbutaline- or BRL37344-induced lipolysis. The ISO- and each βAR agonist-induced lipolysis in the visceral fat was not only higher than in the subcutaneous fat, but also markedly reduced by ISO- or NE-pretreatment. These results showed that short-term treatment of three subtypes of βAR by each agonist induces a rapid reduction in the lipolytic response to βAR stimulation. This suggests some common mechanism for the rapid desensitization of βAR-agonist-induced lipolysis, in contrast with previous reports on the characteristics of βAR subtypes. In addition, the regional difference of adipose tissue not only in inducing lipolysis but also in rapid desensitization was also apparent.     

甲型肝炎病毒吕8株的快速适应性培养

用12天35℃初步适应培育出一株在KMB17细胞稳定传代、感染性滴度高、增殖周期短的HAV适应株LU8株，其感染性滴度为108．33TCID50／ml，抗原滴度为1：1024，一步生长曲线试验和免疫电镜观察结果表明12天为该株病毒增殖高峰。LUB株和H2减毒株HAV经纯化和灭活后接种豚鼠，第一次接种后4周血清HAV抗体均阳转，第二次接种后滴度为1：13．5和1：4．8（GMT），第三次接种后滴度增至1：16和1：8。提示LUB株抗原性较H2株强。