药食同源——山茱萸

山茱,别名肉,俗名枣皮,为山茱科落叶乔木或灌木。山茱英的成熟干燥果实去核后即为名贵药材英肉,供药用,为收敛性强壮药,有补肝肾止汗的功效。药用价值山茱英其味酸涩,性微温,具有滋补、健胃、利尿、补肝肾、益气血等功效。

Effect of annealing temperature on microstructure and mechanical properties of Mg-Zn-Zr-Nd alloy with large final rolling deformation

In this study,the Mg-3Zn-0.5Zr-χNd(χ=0,0.6)alloys were subjected to final rolling treatment with large deformation of 50%.The impact of annealing temperatures on the microstructure and mechanical properties was investigated.The rolled Mg-3Zn-0.5Zr-0.6Nd alloy exhibited an ultimate tensile strength of 386 MPa,a yield strength of 361 MPa,and an elongation of 7.1%.Annealing at different temperatures resulted in reduced strength and obviously increased elongation for both alloys.Optimal mechanical properties for the Mg-3Zn-0.5Zr-0.6Nd alloy were achieved after annealing at 200℃,with an ultimate tensile strength of 287 MPa,a yield strength of 235 MPa,and an elongation of 26.1%.The numerous deformed microstructures,twins,and precipitated phases in the rolled alloy could impede the deformation at room temperature and increase the work hardening rate.After annealing,a decrease in the work hardening effect and an increase in the dynamic recovery effect were obtained due to the formation of fine equiaxed grains,and the increased volume fraction of precipitated phases,which significantly improved the elongation of the alloy.Additionally,the addition of Nd element could enhance the annealing recrystallization rate,reduce the Schmid factor difference between basal and prismatic slip systems,facilitate multi-system slip initiation and improve the alloy plasticity.

“仙药”地黄

地黄(RehmanniaglutinosaLibosch.)是玄参科多年生草本植物[1],一般以块根入药,临床应用广泛。依据炮制方式的不同,地黄可分为鲜地黄、生地黄和熟地黄三种。地黄秋季釆挖,除去芦头、须根及泥沙后鲜用,即为“鲜地黄”;将地黄缓缓烘焙至约八成干,习称“生地黄”;取生地黄,酒炖法或蒸法炮制则得“熟地黄”。鲜地黄味甘苦,性寒,能够清热生津,凉血,止血;生地黄味甘,性寒,能够清热凉血,养阴生津;熟地黄味甘,性微温,能够补血滋阴,益精填髓[2]。地黄制法不同,功效亦有差异,是中药生熟异治的典型体现。

河南道地药材 山茱萸

山茱萸,又称“山萸肉”,是被子植物门双子叶植物纲伞形目山茱萸科山茱萸属植物。山茱萸的干燥成熟果肉,俗名“枣皮”,味酸涩,性微温,是中药“六味地黄丸”必用的药材之一。《神农本草经》有关于山茱萸的记载:“味酸平,主心下邪气,逐寒湿痹,去三虫,久服轻身。”李时珍在《本草纲目》中对山茱萸的药用价值进行了详尽的阐述,将其视为“补益肝肾、调气补虚、明目和强身之药”。

治黄褐斑在脸上敷点山楂粉

提起山楂,多数朋友可能都会对一颗颗红似玛瑙的水果赞不绝口,但也有很多人对它的＂酸＂望而生畏。其实,山楂具有很高的营养和药用价值。山楂为蔷薇科植物山里红或山楂的成熟果实。其味酸、甘,性微温;归脾、胃、肝经;能消食化积,行气散淤。

二黄茶增强抵抗力

不知为何最近皮肤状况看起来很不好,朋友就推荐给我她常喝的一个方子,黄精3~5克,黄芪3~5克,枸杞、西洋参各2~3克。将药材放入杯中用开水浸泡,盖上杯盖焖5~10分钟即可饮用。黑龙江刘女士点评：黄精,性平,味甘甜,具有养阴润肺、补脾益气、滋肾填精的作用,有明显的调脂、降压、延缓衰老、增强免疫功能的功效,并能控制血糖。黄芪,性微温,味甘,入脾、肺经,

High temperature tensile properties of laser butt-welded plate of Inconel 718 superalloy with ultra-fine grains

For successfully forming multi-sheet cylinder sandwich structure of Inconel 718 superalloy, high temperature tensile properties of laser butt-welded plate of Inconel 718 superalloy were studied. The experiment results show that tensile direction has great effect on elongation of the laser butt-welded plate. Under conditions of transverse direction tension, the maximum elongation reaches 458.56% at 950 °C with strain rate of 3.1-10-4 s-1, in which the strain rate sensitivity value m is 0.352 and the welding seam is not deformed. Under conditions of longitudinal direction tension, the maximum elongation is 178.96% at 965 °C with strain rate of 6.2-10-4 s-1, in which m-value is 0.261, and the welding seam contributes to the deformation with the matrix. The microstructure in as-welded fusion zone is constituted of austenite dendrites and Laves phase precipitated in interdendrites. After longitudinal direction tension, a mixed microstructure with dendrite and equiaxed crystal appears in the welding seam due to dynamic recrystallization. After high temperature deforming, many δ-phase grains are transformed from Laves phase grains but a small part of residual Laves phase grains still exist in the welding seam. The deformation result of multi-sheet cylinder sandwich structure verifies that high temperature plasticity of the laser butt-welded plate can meet the requirement of superplastic forming.

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.

Anomalous yield and intermediate temperature brittleness behaviors of directionally solidified nickel-based superalloy

A nickel-based superalloy with good corrosion resistance was fabricated by directional solidification, and its microstructure and tensile properties at elevated temperatures were investigated. Microstructure observations reveal that the γ＇ precipitates are arrayed in the y matrix regularly with some MC, Ni5Hf and M3B2 particles distributed along the grain boundary. The tensile tests exhibit that the tensile properties depend on temperature significantly and demonstrate obvious anomalous yield and intermediate-temperature brittleness （ITB） behavior. Below 650℃, the yield strength decreases slightly but the ultimate tensile strength almost has no change. When the temperature is between 650 ℃ and 750 ℃, the yield and ultimate tensile strengths rise rapidly, and after then they both decrease gradually with temperature increasing further. The elongation has its minimum value at about 700 ℃. The TEM examination exhibits that sharing of the γ＇ by dislocation is almost the main deformation mechanism at low temperatures, but the γ＇ by-pass dominates the deformation at high temperatures. The transition temperature from shearing to by-pass should be around 800 ℃. The anomalous yield and intermediate-temperature brittleness behaviors should be attributed to the high content of γ＇. In addition, the carbides and eutectic structure also contribute some to the ITB behaviors of the alloy.

Effect of temperature on dielectric property and microwave heating behavior of low grade Panzhihua ilmenite ore

The permittivity of low grade Panzhuhua ilmenite ore at 2.45 GHz in the temperatures from 20 ℃ up to 100 ℃ was measured using the technology of open-ended coaxial sensor combined with theoretical computation. The results show that both the real （ε′） and imaginary （ε′） part of complex permittivity （ε′-jε′） of the ilmenite significantly increase with temperature. The loss tangent （tanδ） is a quadratic function of temperature, and the penetration depth of ilmenite decreases with temperature increase from 20 ℃to 100 ℃ The increase of the sample temperature under microwave radiation displays a nonlinear relationship between the temperature （T） and microwave heating time （t）. The positive feedback interaction between complex permittivity and sample temperature amplifies the interaction between ilmenite and the microwave radiation. The optimum dimensions for uniform heat deposition vary from 10 cm to 5 cm （about two power penetration depths） in a sample being irradiated from both sides in a 2.45 GHz microwave field when temperature increases from room temperature to 100 ℃

Microstructure and tensile properties of containerless near-isothermally forged TiAl alloys

Ti-47Al-2Nb-2Cr-0.4（W, Mo） （mole fraction, %） alloy ingot fabricated using vacuum consumable melting was containerless near-isothermally forged, and the high temperature forgeability, microstructure and tensile properties were investigated. The results show that the TiAl ingot exhibits good heat workability during containerless near-isothermally forging process, and there are not evident cracks on the surface of as-forged TiAl pancake with a total deformation degree of 60%. The microstructure of the TiAl ingot appears to be typical nearly-lamellar（NL）, comprising a great amount of lamellar colonies （α2＋γ） and a few equiaxed γ grains. After near-isothermally forging, the as-forged pancake shows primarily fine equiaxed γ grains with an average grain size of 20 μm and some broken lamellar pieces, and some bent lamellas still exist in the hard-deformation zone. Tensile tests at room temperature show that ultimate tensile strength increases from 433 MPa to 573 MPa after forging due to grain refinement effect.

服用人参有禁忌

人参是一种名贵的中药材。中医认为,人参味甘、微苦,性微温,归脾、肺、心、肾经,具有大补元气、复脉固脱、补脾益肺、生津止渴、安神益智等功效,被誉为“百补之王”。很多人喜欢在煲汤或泡药酒时加入一些人参,但是对于人参的种类、功效以及服用禁忌等却缺乏足够的了解。为此,笔者来给大家科普一些关于人参的小知识。

桔梗栽培的初步研究

桔梗为桔梗科植物桔梗Platycodon grandiflorum（Jacq.）A.DC.的干燥根,变种为白花桔梗P.grandiflorum（Jacq.）A.DC.var.album Hort。中药材学名：Radix Platycodonis域：真核域;界：植物界;门：被子植物门;纲：双子叶植物纲;目：菊目;科：桔梗科;属：桔梗属。

Temperature compensation method of silicon microgyroscope based on BP neural network

The temperature characteristics of a silicon microgyroscope are studied, and the temperature compensation method of the silicon microgyroscope is proposed. First, an open-loop circuit is adopted to test the entire microgyroscope＇s resonant frequency and quality factor variations over temperature, and the zero bias changing trend over temperature is measured via a closed-loop circuit. Then, in order to alleviate the temperature effects on the performance of the microgyroscope, a kind of temperature compensated method based on the error back propagation（BP）neural network is proposed. By the Matlab simulation, the optimal temperature compensation model based on the BP neural network is well trained after four steps, and the objective error of the microgyroscope＇s zero bias can achieve 0.001 in full temperature range. By the experiment, the real time operation results of the compensation method demonstrate that the maximum zero bias of the microgyroscope can be decreased from 12.43 to 0.75（°）/s after compensation when the ambient temperature varies from -40 to 80℃, which greatly improves the zero bias stability performance of the microgyroscope.

Microstructure and high temperature oxidation resistance of Si-Y co-deposition coatings prepared on TiAl alloy by pack cementation process

In order to improve the high temperature oxidation resistance of TiAl alloy, Y modified silicide coatings were prepared by pack cementation process at 1030, 1080 and 1130 °C, respectively, for 5 h. The microstructures, phase constitutions and oxidation behavior of these coatings were studied. The results show that the coating prepared by co-depositing Si?Y at 1080 °C for 5 h has a multiple layer structure: a superficial zone consisting of Al-rich (Ti,Nb)5Si4 and (Ti,Nb)5Si3, an out layer consisting of (Ti,Nb)Si2, a middle layer consisting of (Ti,Nb)5Si4 and (Ti,Nb)5Si3, and aγ-TiAl inner layer. Co-deposition temperature imposes strong influences on the coating structure. The coating prepared by Si?Y co-depositing at 1080 °C for 5 h shows relatively good oxidation resistance at 1000 °C in air, and the oxidation rate constant of the coating is about two orders of magnitude lower than that of the bare TiAl alloy.

黄芪生脉饮简介

浙江新光制药厂最新产品“黄芪生脉饮”是在原“生脉饮口服液”的基础上加入黄芪而成。黄芪味甘性微温,入脾、肺两经;含有多糖、胆硷、皂甙、氨基酸、甜菜硷、香豆素及黄酮化合键,能增强机体抵抗力,扩张血管,增强心肌收缩力。据现代药理学研究,生脉饮对急性心功不全有预防作用,主要与改善心肌功能及冠脉循环有关[《天津医药》1974年报道]。

党参补中气益脾肺

党参味微甜、气微香,性微温而不燥,皮松肉紧,质地柔润,秉性中和,善补中气、益肺气、健脾运,且能生津养血、扶正祛邪。党参的得名,是因原出山西上党,而根的形态如人参。因其功近似人参、性较平和、价廉物美,在很多方药中常代替人参使用,故比人参用之更为普遍,医家用之更为得手,消费者更为熟悉。党参在药膳食疗中多有应用。如党参洗净、蒸透至甜软.

党参补中气、益脾肺

党参味微甜、气微香,性微温而不燥,皮松肉紧,质地柔润,秉性中和,善补中气、益肺气、健脾运,且能生津养血、扶正祛邪。党参的得名,是因原出山西上党,而根的形态如人参。因其功近似人参、性较平和、价廉物美,在很多方药中常代替人参使用,故比人参用之更为普遍,医家用之更为得手,消费者更为熟悉。