Research on the Bit Computation Model for Time Variable Channel Bandwidth

For the encoding bit-rate problem in H.264 wireless video communication,this paper analyzes the bit-rate computation model and the Mean Square Error distortion model,establishes the relation between the quantization parameter of the encoding bit-rate and the intra frame refresh rate of the macro block,and put forward a new ideal about the coding rate on the basis of general binomial computation model theory. Furthermore,this method not only can adaptively adjust the bit allocation and quantization parameter and prevents buffer from overflowing downward or upward under given network bandwidth,but also can apply the rate-distortion to optimize the solution method,control the encoding bits accurately and optimizes the allocation between the intra and inter frame encoding macro block.     

浅谈实验小鼠非病理性脱毛原因

随着生命科学研究的发展,动物实验中小鼠的使用频率越来越高。实验人员对实验小鼠不明原因的脱毛现象十分困扰,影响实验结果的判断,本文针对小鼠的非病理性脱毛,简述包括自然发生和偶然诱导脱毛的原因,实验人员可根据具体情况作出科学的判断。     

D-Amino acids in mouse tissues are not of microbial origin

Summary Neutral free D-amino acid contents in the serum, kidney, liver, brain, small intestine and urine in germ-free mice and those in specific pathogen-free mice were compared. No significant difference was found. This strongly suggests that the free D-amino acids which were shown to be present in mice in our previous work^{1, 2} did not originate from the enteric microbial flora.     

膨化料的特点及用于小鼠的试验研究

本研究通过对两种类型饲料的比较，发现没传统的干烤鼠料相比，膨化过程在对饲料做熟化、臌化处理以提高适口性的同时，还兼有一定的灭菌作用；此外，膨化时短时间高温高压对饲料中不稳定养分一维生素类破坏作用弱。膨化料比干烤鼠料硬、不易破碎，浪费少。用膨化料饲喂生长、繁殖实验小鼠，也获得了同干烤鼠料相同的饲喂效果。因此认为膨化料不仅适用于实验犬、猴、也是一种较为理想的实验小鼠饲料。     

Regulation of phagocyte migration and recruitment by Src-family kinases

Src-family kinases (SFKs) regulate different granulocyte and monocyte/macrophage responses. Accumulating evidence suggests that members of this family are implicated in signal transduction pathways regulating phagocytic cell migration and recruitment into inflammatory sites. Macrophages with a genetic deficiency of SFKs display marked alterations in cytoskeleton dynamics, polarization and migration. This same phenotype is found in cells with either a lack of SFK substrates and/or interacting proteins such as Pyk2/FAK, c-Cbl and p190RhoGAP. Notably, SFKs and their downstream targets also regulate monocyte recruitment into inflammatory sites. Depending on the type of assay used, neutrophil migration in vitro may be either dependent on or independent of SFKs. Also neutrophil recruitment in in vivo models of inflammation may be regulated differently by SFKs depending on the tissue involved. In this review we will discuss possible mechanisms by which SFKs may regulate phagocytic cell migratory abilities.     

油松花粉对雄性幼年小白鼠睾丸发育及精子生成的影响

研究了油松花粉对雄性幼年小白鼠睾丸发育及精子生成的影响．并与睾酮组和正常对照组进行了比较．结果表明：油松花粉具有类似睾酮的作用，可促进睾丸的发育及精子的生成，油松花粉作为营养保健品开发，儿童不宜服用。     

A novel data embedding method for H.264 stereo video codec with joint prediction scheme

It is important to reduce data redundancy of stereo video in practical applications. In this paper,first,a data embedding method for stereo video(DEMSV) is investigated by embedding the encoding data into the reference frame to encode stereo video. It can use only one channel to transfer all the video data and the receiver can choose a monocular video decoder or stereo video decoder adaptively. Then,introducing the joint prediction scheme in the coding process of DEMSV,we propose a novel data embedding meth...     

有效微注射和移植受精卵建立转基因鼠

试验研究了转基因小鼠建立中的受精卵显微注射和移植，对获得受精卵、有效注射及移植易出现的问题和解决方法进行了讨论，对注射后的受精卵的移植加以改进，建立了人Ｇ－ＣＳＦ转基因小鼠模型．