研究食品感官品质的动力学方法

研究食品感官品质的时间－强反响应曲线动力学方法，能揭示人们对呈味物等刺激的知觉过程奥密。这里评述其技术、运用与前景。     

Chronic sensory denervation reduces thrombin-stimulated endothelin release from aortic endothelial cells

The long-term (trophic) influence of perivascular nerves on the endothelium was investigated by measuring changes in thrombin-stimulated release of the potent vasoconstrictor, endothelin, after selective chronic denervation. Rat pups were treated with either guanethidine or capsaicin to destroy sympathetic or sensory nerves, respectively. The abdominal aortas from the rats at three months of age (5 pooled per experiment) were incubated with 4U thrombin/ml in medium for 24 h at 37°C, and the amount of endothelin released from the preparation determined by immunoassay. After neonatal sensory denervation there was a significant reduction in the thrombinstimulated release of endothelin compared to the controls (0.012±0.012 (4) compared to 0.063±0.012 (6), pmol/cm²/24 h, p<0.02). There was no change in endothelin release after sympathetic denervation. In summary, sensory nerves play a trophic role in the expression of endothelin in endothelial cells of the intima.     

Analysis of synaptic integration using the laser photoinactivation technique

Summary Crickets (and many other insects) have two antenna-like appendages at the rear of their abdomen, each of which is covered with hundreds of filiform hairs resembling the bristles on a bottle brush. Deflection of these filiform hairs by wind currents activates mechanosensory neurons at the base of the hairs. The axons from these sensory neurons project into the terminal abdominal ganglion to form a topographic representation (or map) containing information about the direction, velocity and acceleration of wind currents around the animal. Information is extracted from this map by primary sensory interneurons that are also located within the terminal abdominal ganglion. In this paper, we review the progress that has been made toward understanding the mechanisms underlying directional sensitivity of an identified sensory interneuron in the cricket,Acheta domesticus. The response properties of the cell have been found to depend to a large extent upon the structure of its dendritic branches, which determines its synaptic connectivity with the sensory afferents in the map of wind space and the relative efficacy of its different synaptic inputs.     

PEF处理对冷冻浓缩西瓜汁品质影响的研究

本文探讨温度对果汁电导率影响以及不同处理西瓜汁贮藏期间品质变化情况,采用模糊数学方法对不同处理的西瓜汁进行感官评价.结果表明,可通过控制温度来控制浓缩果汁电导率的大小,以达到PEF杀菌条件.将PEF应用于冷冻浓缩西瓜汁杀菌处理,其微生物指标达到国家标准.贮藏期间各理化指标的比较发现,pH值,固形物含量变化不大,而VC含...     

猪皮胶制备中的酶解工艺研究

以单因素分析为基础,结合正交试验,水解度和感官评分为指标,研究木瓜蛋白酶酶法制备猪皮胶的最佳工艺条件。结果表明:在料液比3:1、pH值6.0、加酶量2.5%、酶解温度50℃、酶解时间2.5 h的条件下酶解猪皮,效果最佳,且制成品品质优良。     

Somatic/ visceral sensory neurons in the spinal cord and synaptic/junctional activity in the spinal ganglion

Somato-visceral interaction or acupoint-visceral interaction is an important subject that greatly concerns scholars of both Chinese traditional and Western modern medicine. The role of our newly discovered spinal projection neurons and type A or C spinal ganglion neurons in convergence and integration of somato-visceral sensation is introduced. The possible challenge brought about by these related results onto some traditional concepts in neuroscience is also discussed.     

Sex pheromone communication in the lepidoptera: New research progress

Summary Significant progress has been made recently in research on lepidopterous sex pheromones. Advances in understanding the biochemical, neurobiological, and behavioral events that results in both successful and unsuccessful pheromone communication have allowed researchers to gain new insights into the genetic control and evolution of phermone systems.     

朝鲜鹌鹑耳蜗感觉上皮的超微结构研究

对朝鲜鹌鹑耳蜗感觉上皮的超微结构进行了研究。朝鲜鹌鹑耳蜗感觉上皮包括听壶感觉上皮和基乳突感觉上皮两部分。这两部分感觉上皮均由毛细胞和支持细胞构成。毛细胞基部与神经末梢形成突触,顶端角质锥中伸出动纤毛和静纤毛,与鸡的耳蜗毛细胞相似,朝鲜鹌鹑耳蜗毛细胞缺乏动纤毛。