5种温热性活血化瘀中药对寒凝血瘀证大鼠内分泌激素及5-羟色胺、去甲肾上腺素的影响

目的探讨温热性活血化瘀中药干预寒凝血瘀证模型大鼠的性-效机制。方法实验动物为远交群SD大鼠,采用冰水浸泡法复制寒凝血瘀证模型。300只造模成功的寒凝血瘀证模型大鼠,按体重均衡原则随机分为5组,每组60只,分别用于平行观察三碘甲腺原氨酸(T3)、四碘甲腺原氨酸(T4)、孕酮(P)、5-羟色胺(5-HT)及去甲肾上腺素(NE)5个指标;各组再分为模型组、姜黄组、川芎组、红花组、延胡索组、乳香组6个亚组,每组10只;每个指标组分别设正常对照组,每组10只,共使用正常大鼠50只。完成1项观察指标需70只大鼠(7组),5个观察指标共用350只大鼠。各给药组按20 g生药/kg体重灌胃给予相应的中药水煎液,1天1次,1次3 m L,连续7天;同时正常组和模型组予等量生理盐水。检测各组大鼠给药前、给药1周T3、T4、P、5-HT及NE的含量。结果与本组给药前比较,给药后川芎组T3、乳香组T3、各给药组T4、川芎组5-HT、各给药组NE及各给药组P水平均升高(P<0.05);与正常组比较,模型组T3、T4、5-HT、NE及P水平均降低(P<0.05)。与模型组比较,各给药组T3、T4、5-HT、NE水平升高(P<0.05),P水平川芎组、乳香组差异有统计学意义(P<0.05)。结论温热性活血化瘀中药对寒凝血瘀证模型大鼠血清T3、T4、NE及P等具有组群特征性调控作用,可促进机体甲状腺-性腺轴功能,增强内分泌系统功能,这可能是温热性活血化瘀中药调治寒性血瘀证的药效学机制之一。

GRP新型温室覆盖膜温热特性的研究

为解决现有温室塑料覆盖膜使用寿命短、变光性能差、造价高的问题, 研制成功了经济耐用、变光性能优的GRP新型覆盖材料。在实验基础上, 运用现代数理统计方法, 初步分析了GRP温室覆盖材料的温热特性, 防雾和防滴性能及对栽培作物产量的影响。结果证明, GRP膜具有良好的温热性与保温性, 在最低气温条件下, 试验温室室内最低气温比对照温室室内气温高2℃, 而最高气温均为32℃; 在阴天, GRP膜的增温效果较EVA膜好,最好时比对照温室内气温高3 30℃。另外, 在实验期间, 试验温室从未见过起雾, 滴水也很少, 说明新材料具有良好的防雾、防滴性能。因此, GRP膜对作物生产具有明显的增产效应, 与对照温室相比, 增产幅度高达16 2%。

温热性水果的食疗价值

水果是人人喜爱的食疗佳品,要达到最佳的食疗效果,还必须了解水果的不同性质及自己的体质。邻居小王平时面部多油,素爱起痘痘,大便也容易干燥。有一天接到朋友从海南寄来的一箱芒果,看着金灿灿的大芒果,她食欲大增,一口气吃了三个。不料,第二天嘴上就起了一个大泡,眼睛也被厚厚的眼屎黏住了。

温热治疗肿瘤的基础研究进展

在肿瘤治疗学中,温热治疗是指运用不同方法对恶性肿瘤进行热治疗,他常与放疗、化疗联用,肿瘤的温度常在40-43℃．现综述温热治疗的细胞死亡、体内温热治疗的特征以及温热治疗的效应器等方面的研究进展．

婴儿服装的舒适性及安全防护性设计

本文主要从服装的湿热舒适性、活动舒适性、触觉舒适性以及安全性能方面分析婴儿服装的面料选择、款式的设计、结构的设计及工艺处理等问题。

温热治疗肿瘤的分子学研究进展

在肿瘤治疗学中，温热治疗是指运用不同方法对恶性肿瘤进行热治疗，它常与放疗、化疗联用，肿瘤的温度常在40-43℃。本文主要综述了温热治疗的细胞死亡、体内温热治疗的特征，以及温热治疗的效应器等方面的研究进展。

Numerical Analysis of Explosion Characteristics of Vent Gas From 18650 LiFePO_(4) Batteries With Different States of Charge

The combustion and explosion characteristics of lithium-ion battery vent gas is a key factor in determining the fire hazard of lithium-ion batteries.Investigating the combustion and explosion hazards of lithium-ion batteries vent gas can provide guidance for rescue and protection in explosion accidents in energy storage stations and new energy vehicles,thereby promoting the application and development of lithium-ion batteries.Based on this understanding and combined with previous research on gas production from lithium-ion batteries,this article conducted a study on the combustion and explosion risks of vent gas from thermal runaway of 18650 LFP batteries with different states of charge(SOCs).The explosion limit of mixed gases affected by carbon dioxide inert gas is calculated through the“elimination”method,and the Chemkin-Pro software is used to numerically simulate the laminar flame speed and adiabatic flame temperature of the battery vent gas.And the concentration of free radicals and sensitivity coefficients of major elementary reactions in the system are analyzed to comprehensively evaluate the combustion explosion hazard of battery vent gas.The study found that the 100%SOC battery has the lowest explosion limit of the vent gas.The inhibitory elementary reaction sensitivity coefficient in the reaction system is lower and the concentration of free radicals is higher.Therefore,it has the maximum laminar flame speed and adiabatic flame temperature.The combustion and explosion hazard of battery vent gas increases with the increase of SOC,and the risk of explosion is the greatest and most harmful when SOC reaches 100%.However,the related hazards decrease to varying degrees with overcharging of the battery.This article provides a feasible method for analyzing the combustion mechanism of vent gas from lithium-ion batteries,revealing the impact of SOC on the hazardousness of battery vent gas.It provides references for the safety of storage and transportation of lithium-ion batteries,safety protection of energy storage stations,and the selection of related fire extinguishing agents.

Fe-Al/Al_2O_3复合材料与ZTA陶瓷的抗热震性研究

对Fe -Al/Al2 O3 复合材料的抗热震性进行了测定。通过与ZTA陶瓷的抗热震性对比 ,分析了该复合材料具有较好抗热震性的原因。试验发现 :Fe -Al/Al2 O3 复合材料的残余硬度和抗压强度随ΔT的变化有明显差异。在热震温差很高时 ,Fe -Al相的高温热强性改善了Fe -Al/Al2 O3 复合材料的抗热震性。

聚乙烯吹塑膜的改性

随着商品包装的多样化、高档化,对包装材料的性能要求也愈来愈要求严格,包装材料要求的性能也由原来的抗张强度、伸长率、冲击强度向更高更广的方向发展:静、动摩擦系数、抗静电、电磁屏蔽等.因此原有的吹膜级LDPE树脂用于复合膜内封层就不能全部满足当今高速自动灌装机的要求,LDPE树脂就要进行适当的改性才能满足这些要求.

高纯度、低偏析GH4169合金研究进展

镍基高温合金GH4169镍含量高达50%以上,是一种以析出强化为主、固溶强化和晶界强化为辅的变形高温合金,在650℃以下高温环境工作时,不仅具有优异的高温强度、极高抗氧化和耐腐蚀性能,而且还具有良好的焊接性能,广泛应用于航空航天发动机等高温零部件。随着我国航空航天发动机不断的更新换代,对内燃机和发动机用镍基高温合金的高温热强性和耐候性提出了更高的要求。针对GH4169合金纯净化制备方法、焊接性能、热加工工艺和锻造等方面,系统介绍了制备技术和热加工的作用,总结了最优的熔炼技术、焊接工艺和热加工技术,分析了GH4169变形高温合金的应用和发展趋势。

高温主汽用15X1M1Φ钢接头失效及解决措施

为了研究俄供机组高温运行后的大口径厚壁管道15X1M1Φ钢(对应中国牌号15Cr1Mo1V)在焊接接头出现的大量横向裂纹问题,取样进行了各种宏观、微观检验分析,进行了失效原因分析、多种焊接工艺试验及评定。分析表明:原安装工艺施焊的焊缝金属表现为低塑性、低韧性状态,开裂性质为高温下运行后发生的焊缝再热开裂,并非运行方式所致。根据再热开裂原因,改进了焊条成分并优化了焊接工艺,可有效防止高温运行再热开裂,确保接头的高温热强性能达到设计要求,保障机组安全运行。

Tolerance of a Restorer Line R1056 to High Temperature and Its Application in Rice Breeding

The tolerance of a restorer line R1056 of rice and its hybrid combinations to high temperature at flowering stage was evaluated by sowing them at three dif- ferent dates and transplanting them into a greenhouse equipped with heating system at flowering stage. Several important agronomic traits of these rice varieties or combinations were also measured. The results revealed that treated by high temper- ature （38 ℃） at flowering stage, the seed setting rate （70.4%）, percentage of dehis- cent anthers （75.5%）, and pollen number per floret （78） of R1056 were close to those of N22, which is tolerant to high temperature, and significantly higher than those of the rice varieties sensitive to high temperature. The seed setting rate, per- centage of dehiscent anthers, and pollen number per floret of the hybrid combina- tions generated from R1056 were smaller than those of R1056, but higher than those of the rice varieties sensitive to high temperature. R1056 had excellent agro- nomic traits, and good combining ability, and its hybrid combinations had low plant height, numerous panicles and high yield, suggesting that R1056 is not only an ex- cellent rice variety with tolerance to high temperature, but also an excellent restorer in three-line hybrid rice breeding.

Dielectric properties and temperature increase characteristics of zinc oxide dust from fuming furnace

Cavity perturbation method was used to determine the dielectric properties （ε′,ε″, and tanδ） of zinc oxide dust in different apparent densities. The process was conducted to study the microwave-absorption properties of zinc oxide dust and the feasibility of microwave roasting zinc oxide dust to remove fluorine and chlorine. The dielectric constant, dielectric loss, and loss tangent were proportional to the apparent density of zinc oxide dust. The effects of sample mass and microwave power on the temperature increase characteristics under the microwave field were also studied. The results show that the apparent heating rate of the zinc oxide dust increases with the increase in microwave roasting power and decreases with the increase in the sample mass. The temperature of the samples reaches approximately 800 ＆#176;C after microwave treatment for 8 min, which indicates that the zinc oxide dust has strong microwave-absorption ability.

Viscous warm pressure bulging process of AZ31B magnesium alloy with different ellipticity dies

Based on the bulging principle of different ellipticity dies, the methyl vinyl silicone rubber with excellent thermal stability and heat transfer performance was chosen as the viscous medium. The finite element analysis and experiments of viscous warm pressure bulging （VWPB） of AZ31B magnesium alloy were conducted to analyze the influence of different ellipticity dies on the formability of AZ31B magnesium alloy. At the same time, based on the grid strain rule, the forming limit diagram （FLD） of VWPB of AZ31B magnesium alloy was obtained through measuring the strain of bulging specimens. The results showed that at the temperature range of viscous medium thermal stability, the viscous medium can fit the geometry variation of sheet and generate non-uniform pressure field, and as the die ellipticity increases, the difference value of non-uniform pressure reduces. Meanwhile, according to the FLD, the relationship between part complexity and ultimate deformation was investigated.

Experimental study on thermal characteristics of a double skin faade building

An experimental study of the thermal characteristics of an existing office building with double skin facade DSF were conducted in hot summer daytime in Nanjing China. The temperature distributions of the DSF and indoor environment were measured at different control modes of DSF.The results show that the energy consumption of the air conditioning system in room B with opened exterior vents a closed interior facade and an air cavity with shading was 21.0% less than that in room A with closed exterior vents a closed interior facade and air cavity without shading in 9.5 h. The temperature distributions of the DSF and indoor environment in both horizontal and vertical directions were decisively influenced by shading conditions. The usage of shading devices strengthens the stack effect on the air cavity. Compared to room A the temperature distribution in room B is more uniform with smaller fluctuations.Meanwhile the problem of overheating in the air cavity of the DSF is still present in all tested conditions.

Effects of Sn element on microstructure and properties of Zn-Cu-Bi-Sn high-temperature solder

The microstructures and properties of the Zn-Cu-Bi-Sn(ZCBS) high-temperature solders with various Sn contents were studied using differential scanning calorimetry(DSC),scanning electron microscopy(SEM) and X-ray diffraction(XRD).The results indicate that the increase of Sn content can both decrease the melting temperature and melting range of ZCBS solders and it can also effectively improve the wettability on Cu substrate.The shear strength of solder joints reaches a maximum value with the Sn addition of 5%(mass fraction),which is attributed to the formation of refined β-Sn and primary ε-CuZn_5 phases in η-Zn matrix.However,when the content of Sn exceeds 5%,the shear strength decreases due to the formation of coarse β-Sn phase,which is net-shaped presented at the grain boundary.

A Novel Built-in CMOS Temperature Sensor for VLSI Circuits

A novel temperature sensor is developed and presented especially for the purpose of on-line thermal monitoring of VLSI chips.This sensor requires very small silicon area and low power consumption,and the simulation results show that its accuracy is in the order of 0.8℃.The proposed sensor can be easily implemented using regular CMOS process technologies,and can be easily integrated to any VLSI circuits to increase their reliability.

Thermostability of Vane Absorber

Aim To improve the thermostability of vane absorbers while designing and manu- facturing. Methods Having considered the structural features of vane absorbers, measures that could reduce the force decay ratio of vane absorbers were discussed. A kind of practical auto temperature compensation apparatus, whose theoretical basis had been discussed, was designed. Results Compared to the prototype vane absorber, this kind of apparatus could decrease force decay ratio sharply. Thus, the thermostability of vane absorbers was improved greatly The accuracy of theoretical analysis and the effectiveness and feasibility of the apparatus was proved by actual testing Conclusion changing vane absorber's configuration, its performance is improved.

Effect of pouring and mold temperatures on hot tearing susceptibility of AZ91D and Mg-3Nd-0.2Zn-Zr Mg alloys

Pouring and mold temperatures are two important parameters during casting magnesium components. The present study examined their influence on hot tearing susceptibility （HTS） of commercial AZ91D and newly developed Mg-3Nd-0.2Zn-Zr （mass fraction, %; NZ30K） magnesium alloys in gravity permanent mold casting condition. The results indicate that mold temperature shows much more significant influence on the HTS of both alloys than pouring temperature whose influence only can be distinguished at low mold temperature （341 K for AZ91D alloy and 423 K for NZ30K alloy）. Hot tearing susceptibility prediction model concerning feeding parameters, grain size and solidification range, is more suitable to estimate the HTS of different magnesium alloys than the model only concerning feeding parameters. In order to achieve better hot tearing resistance, the ranges of pouring and mold temperatures are suggested to be 961-991 K and≥641 K for AZ91D alloy, 1003-1033 K and≥623 K for NZ30K alloy, respectively.