胎型

Analyzed the correlation of different genotypes and productive performances in Sutai pigs with the BB、BD and DD genotypes of HaeⅢdigestion analysis and Sutai pigs with the AA、AB、BB genotypes of RsaⅠdigestion analysis, the results showed significant correlation with postweaning viability in the second litter, and the significant correlation with the total litter, number of viable pigs, litter weight at birth, number of ablactation pigs and litter weight after ablactation in the third litter.

8苏太猪SLA-DQB不同基因型的生产性能比较表明，HaeⅢ酶切的3种基因型BB、BD和DD分别与RsaⅠ酶切的3种基因型AA、AB、BB相对应，HaeⅢ酶切的3种基因型和RsaⅠ酶切的3种基因型均与2胎断奶成活率显著相关，与3胎总产仔数、产活仔数、初生窝重、断奶仔猪数和断奶窝重显著相关，与6胎总产仔数、断奶仔猪数和断奶窝重也显著相关。

The matrix composites for diamond tools were tested with such modern testing instruments and equipments as DTA-7 differential thermal analyzer, JCXA-733 electronic probe and scanning electron microscope, JEM 2000 FX Ⅱ transmission electron microscope, eXL energy spectrometer, and humidity test instrument. The analysis, comparison, and induction of the testing results prove the enhancing effects of the rare earth on the matrix composites: degeneration, micro-alloying, purification, and catalytic activation. The comprehensive function of these effects leads to the decrease in the porosity of the matrix composites and to the increase in such actual indexes as the flexural strength, hardness, and impact ductility of the whole rare earth Fe-based diamond tool materials.

由DTA-7型差热分析仪、JCXA-733型电子探针及扫描电镜、JEM2000FXⅡ型透射电镜、eXL能谱仪以及莱茨2AP高温显微镜材料润湿性测试仪等现代测试仪器设备对金刚石工具材料进行了测试实验，对测试实验的结果进行了分析、比较和归纳，证实了稀土对胎体材料具有变性、微合金化、纯化和催化活化等四大强化作用机理，这些机理的综合作用导致了胎体材料孔隙率的降低和整个稀土Fe基金刚石工具材料抗弯强度、硬度及冲击韧性等实际使用性能的上升。

PCR-RFLP in FSHR gene 5'–flanking region with exon 1 digested by restriction endonuclease TaqⅠdemonstrated that the frequencies of allele A (0.5500) and genotype AA (0.5000) in twinning cows were higher than that of allele A (0.3500) and genotype AA (0.3000) in monovular cows for Qinchuan cattle, while The frequencies of allele B (0.5937) and genotype BB(0.6875) in twinning cows were higher than that of allele B (0.5416) and genotype BB (0.4167) in monovular cows for Holstein cattle. Key words: Bovine; Twinning; FSHR gene; PCR-RFLP

FSHR基因5'端（包括侧翼序列和第一外显子）的限制性内切酶TaqⅠ的PCR-RFLP标记研究发现，在秦川牛中双胎母牛的A基因频率（0.5500）和AA基因型频率（0.5000）分别高于单胎母牛的A基因频率（0.3500）和AA基因型频率（0.3000）；在黑白花奶牛中双胎母牛的B基因频率（0.5937）和BB基因型频率（0.6875）均高于单胎母牛的B基因频率（0.5416）和BB基因型频率（0.4167），也就是FSHR基因的5'端的PCR-RFLP标记在一个品种内单胎母牛和双胎母牛之间有一定趋势，但两个品种的趋势不同。

The frequencies of genotypes were significantly different among the lines (P.001), with BB genotype primarily existing in HU-Yang,++ genotype in Chinese Merino monotocous line, and B+ genotype in Chinnese Merino multiparous lines.

等位基因型频率在各品种间差异极显著（P.001），在湖羊中以BB基因型为主，在中国美利奴单胎品系中以++基因型为主，而在中国美利奴肉用和毛用多胎品系中以B+基因型为主。

With reading a mass of the documents about the rolling resistance and wet anti-grapping, there are 11 types semisteel belt tyres formularies designed in this paper by changing carbon black and SBR1502/SBR1712/BR9000 blending ratio, which answer for the actual demands of the tyre industry and have a certain extent engineering practicability.The DMA curves of 11 types tread rubber materials used in tires with the changes of temperature have been obtained by using Dynamic Mechanics Analysis technique on NETZSCH DMA242 instrument.

本文采用动态力学分析法，使用NEZSCH公司生产的DMA242型实验仪，获得了11种胎面胶的DMA温度曲线，从炭黑和生胶配比变化两方面，分组对不同系列的胎面胶的储能模量—温度曲线和损耗因子—温度曲线进行了分析比较，并参照1#胶料，对11种胎面胶—10℃～10℃和50℃～80℃的tanδ进行比较，讨论了炭黑及SBR1502/SBR1712/BR9000并用比的改变对胎面胶滚动阻力、湿抓着力的影响；在动态力学分析实验的基础上，还获得了11种胎面胶的生热率曲线，并分组进行了比较，研究了配方与生热率的关系。

This result indicates that WT1 gene plays an important role in differentiation and development of fetal kidney and may be the factor that promotes metanephric blastemal cell to differentiate into epithelial cell.

结果显示小胎龄肾组织中WT1蛋白在胚基细胞和幼稚肾小球细胞核表达而大胎龄组肾组织中WT1在肾小管细胞胞浆表达，阳性率分别为57.1％(8/14)和46.2%(6/13)，提示WT1基因在胚胎肾分化发育的过程中起着重要作用，WT1蛋白可能是促进后肾胚基细胞向上皮细胞分化的调控因子，其表达在时间上和空间上都受到严格的调控，WT1的表达异常可能导致胚基细胞分化停滞。17例肾母细胞瘤WT1蛋白表达阳性率为41.2%(7/17)，阳性部位在胚基型和上皮型肿瘤细胞核，表达部位和阳性率与早期胚胎肾相似，其中间质型肾母细胞瘤均为阴性，胚基型和上皮型肾母细胞瘤阳性率70%(7/10)，两组间阳性率有显著差异。

In summer of the result of the experiment, we can suspect the traditional Chinese medicine BaoTai Decoction may urge Th2 cytokine (IL-4, IL-10)'s express level to increase and Th1 cytokine (IL-12, IFN-γ)'s express level to decrease through adjusting Th cell's network equibrium, then prohibit maternal -fetal immune system to assault Fetus, which is good to maintenancing cyesis.

综合本实验结果，推测中药保胎汤可能通过双相性调节母-胎界面Th细胞网络的平衡，促使保护母-胎免疫功能Th2型细胞因子（IL-4，IL-10）增加，损伤母-胎免疫Th1型细胞因子（IL-12，IFN-γ）抑制，从而阻止母胎免疫系统对胎儿的攻击，利于妊娠维持。

According to the above evaluation of immuno-epidemiology of RSA, RSA may be etiologically classified into lack of materno-fetal immuno-recognition, materno-fetal inappropriate immuno-recognition, and disorder of materno-fetal immuno-recognition.

根据RSA免疫流行病学分析，RSA的病因可以分类为：母-胎免疫识别低下型、母-胎免疫识别过度型及母-胎免疫识别紊乱型。

This is a statement of fact and not a return to the fetalization and neotony theories of old.

这是对事实的陈述，而不是回到关於胎型和幼期性熟的理论。

During the experiment, we choose Toyota Corona 1600cc as a test car and measure its maximal acceleration value by means of palm vibration noise analyzer, on conditions of the same tire pressure, speed, load, and road section and measure fuel consumption in a fixed speed and mileage. In addition, by using tire pressure gauge and infrared thermometer, measure after-driving tire pressure and tire temperature to make a comparative analysis. Finally, we use 185/60 R-14 Goodyear tire to measure tire sinkage in an empty car and a loaded car and obtain tire compression ratio to explain the difference of riding comfort and economical consideration of fuel consumption between nitrogen-filled tires and compressed air tires.

在实验时，采用丰田Corona 1600cc轿车，在相同的胎压、车速、负载、路段等条件下，透过掌上型振动噪音分析仪，撷取车辆行驶之最大峰值加速度；并在稳定车速及固定里程下量测汽油之消耗量，再以胎压表和红外线温度计，量取行驶后之胎压和胎温值来作比较分析，最后，再使用185/60 R-14 Goodyear 轮胎，在车上量测空车及负载下轮胎的下沉量，并求得轮胎的压缩率变化值，来说明氮气轮胎与一般压缩空气轮胎，在乘坐舒适性及燃油经济性上的差异原因。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。