五加生化胶囊结合甲氨蝶呤治疗植入性胎盘临床疗效及安全性观察

目的探究五加生化胶囊结合甲氨蝶呤治疗植入性胎盘临床疗效及安全性。方法研究合计纳入83例植入性胎盘患者,均由医院2018年6月—2020年3月收治,采取随机数字表法将患者分为对照组以及观察组,予以对照组患者(41例)甲氨蝶呤治疗,予以观察组患者(42例)五加生化胶囊结合甲氨蝶呤治疗,比较各组患者治疗效果、治疗前后患者胎盘植入组织最大直径变化、治疗前后患者中医症状(产后持续流血、小腹坠痛、腰酸、舌黯红瘀点、苔薄白、脉涩或细数)积分变化、治疗前后患者子宫内膜厚度变化、治疗后各组患者出血持续时间及胎盘排除时间、血绒毛膜促性腺激素恢复正常时间(HCG)、患者治疗后盆腔炎症发生率、继发性不孕发生率、不良反应情况。结果观察组患者治疗效果优于对照组患者,P<0.05;治疗前两组患者胎盘植入组织最大直径比较,P>0.05,治疗后各组患者胎盘植入组织最大直径均缩小,观察组患者治疗后胎盘植入组织最大直径小于对照组,P<0.05;治疗前,两组患者产后持续流血、小腹坠痛、腰酸、舌黯红瘀点、苔薄白、脉涩或细数等中医症状积分比较,P>0.05,治疗后各组患者产后持续流血、小腹坠痛、腰酸、舌黯红瘀点、苔薄白、脉涩或细数等中医症状降低,观察组患者治疗后产后持续流血、小腹坠痛、腰酸、舌黯红瘀点、苔薄白、脉涩或细数低于对照组患者,P<0.05;治疗后,观察组患者子宫内膜厚度情况显著优于对照组,P<0.05;观察组患者出血持续时间及胎盘排除时间、血绒毛膜促性腺激素恢复正常时间均短于对照组患者,P<0.05;观察组患者盆腔炎症发生率(4.76%,2/42)低于对照组(21.95%,9/41),继发性不孕发生率(0.00%)低于对照组(9.76%,4/41)(P<0.05);观察组患者不良反应(4.76%,2/42)与对照组不良反应率(7.32%,3/41)均较低,P>0.05。结论五加生化胶囊结合甲氨蝶呤治疗植入性胎盘临床疗效显著,盆腔炎症发生率、继发性不孕发生率降低,患者恢复较好,不良反应率低,安全可靠,值得应用。

五加生化胶囊治疗产后出血的疗效及对产妇凝血功能、炎症反应的影响

目的分析五加生化胶囊治疗产后出血的疗效及对产妇凝血功能、炎症反应的影响。方法2019年9月—2021年8月河北北方学院附属第二医院产科收治的产后出血产妇100例,通过随机数字表法分为研究组50例及对照组50例。两组均接受常规治疗,对照组接受米索前列醇片治疗,研究组接受五加生化胶囊联合米索前列醇片治疗,两组均治疗7 d。比较两组出血情况,治疗前、治疗后两组子宫下降高度及凝血功能、炎症反应,治疗后疗效。结果研究组用药后24 h出血量低于对照组,出血持续时间、恶露持续时间短于对照组(P<0.05)。治疗后,两组血浆纤维蛋白原(FIB)和D-二聚体(D-D),血清C反应蛋白(CRP)、肿瘤坏死因子-α(TNF-α)和白细胞介素-8(IL-8)水平较治疗前均降低,且研究组低于对照组(P<0.05);治疗后,两组子宫下降高度均较治疗前增加,研究组高于对照组(P<0.05)。治疗后,研究组总有效率高于对照组[94.00%(47/50)vs 80.00%(40/50),P<0.05]。结论五加生化胶囊治疗产后出血可提高出血控制效果,促进子宫复原,或许与其可调节机体凝血功能、抑制炎症反应有关,值得临床进一步研究与应用。

Capacitive Microwave MEMS Switch

A novel capacitive microwave MEMS switch with a silicon/metal/dielectric as a membrane is fabricated successfully by bonding and etching-stop process. Its principal, design, and fabricating process are described in detail. A patterned dielectric layer, Ta2O5, with dielectric constant of 24 is reached. Experiment results show this novel structure,where the switch＇s dielectric layer is not prepared on the transmission line, features very low insertion loss. The insertion loss is 0.06dB at 2GHz and lower than 0.5dB in the wider range from De up to 20GHz,especially when the transmission line metal is only 0. 5μm thick.

Reduction and deposition of arsenic in copper electrolyte

The influences of temperature, H2SO4 concentration, CuSO4 concentration, reaction time and SO2 flow rate on the reduction of arsenic（V） with SO2 were studied and the deposition behavior of arsenic （III） under the effect of concentration and co-crystallization was investigated in copper electrolyte. The results indicate that reduction rate of arsenic （V） decreases with increasing temperature and H2SO4 concentration, but increases with increasing SO2 flow rate and reaction time, and it can reach 92% under appropriate conditions that reaction temperature is 65 °C, H2SO4 concentration is 203 g/L, CuSO4 concentration is 80 g/L, reaction time is 2 h and SO2 gas flow rate is 200 mL/min. To remove arsenic in the copper electrolyte, arsenic （V） is reduced to trivalence under the appropriate conditions, the copper electrolyte is concentrated till H2SO4 concentration reaches 645 g/L, and then the removal rates of As, Cu, Sb and Bi reach 83.9%, 87.1%, 21.0% and 84.7%. The XRD analysis shows that crystallized product obtained contains As2O3 and CuSO4·5H2O.

Characterization of V_2O_5/MoO_3 composite photocatalysts prepared via electrospinning and their photodegradation activity for dimethyl phthalate

Vanadium pentoxide（V2O5）/molybdenum trioxide（MoO 3） composites with different molar ratios of vanadium（V） to molybdenum（Mo） were synthesized via a simple electrospinning technique. The photocatalytic activity of the composites were evaluated by their ability to photodegrade methylene blue and dimethyl phthalate（DMP） under visible-light irradiation. Compared with pure V2O5 and MoO 3,the V2O5/MoO 3 composites showed enhanced visible-light photocatalytic activity because of a V 3d impurity energy level and the formation of heterostructures at the interface between V2O5 and MoO 3. The optimal molar ratio of V to Mo in the V2O5/MoO 3 composites was found to be around 1/2. Furthermore,high-performance liquid chromatographic monitoring revealed that phthalic acid was the main intermediate in the photocatalytic degradation process of DMP.

Effects of V2O5 on Proliferation and Differentiation of Limb Bud Cells of Rat

The micromass culture was used to determine the effects of vanadium pentoxide (V2O5 ) on the proliferation and differentiation of limb bud cells of rat. In the in vitro test, the results showed that V2O5 had obvious inhibiting effects on both proliferation and differentiation of limb bud cells with a dosedependent response, its proliferating and differentiating IC50 being 13.64 and 4.77μmol/L, respectively. In the in vivo/in vitro test, the results showed that V2O5 had no obvious effect on cell proliferation but had obvious inhibiting effect on cell differentiation. These results indicated that V2O5 might have a specific inhibiting effect on the differentiation of limb bud cells.

Dibenzocyclooctadiene Lignans with Platelet-Activating Factor (PAF) Antagonist Activity from Kadsura heteroclita

Seven known dibenzocyclooctadiene lignans,tigloylgomisin P(1), angeloylgomisin P(2),gomisin A(3),Schizandrin(4),angeloylgomisin H(5),gomisin B(6) and R(+)-gomisin M_1(7)were isolated from Kadsura heteroclita.The conformation of tiglolylgomisin P(1)was established by 2D NMR techniques.Using[~3H]platelet activating factor(PAF)binding to human platelet membrane assay,(1),(2)and(7)showed PAF receptor antagonistic activities.

五脏温阳化瘀汤对血管性痴呆模型大鼠海马组织PI3K/Akt-mTOR信号通路的影响

目的探讨五脏温阳化瘀汤治疗血管性痴呆的可能作用机制。方法 55只大鼠随机选择8只为假手术组,剩余大鼠采用双侧颈总动脉永久性结扎法制备血管性痴呆模型。将造模成功的39只大鼠随机分为中药高剂量组10只,中药低剂量组10只,吡拉西坦组10只,模型组9只。中药高、低剂量组分别给予五脏温阳化瘀汤5、1. 25 g/(kg·d)灌胃,吡拉西坦组给予吡拉西坦分散片0. 15 g/(kg·d)灌胃,假手术组和模型组每日给予等量生理盐水灌胃。2周后用Morris水迷宫测试大鼠的学习记忆能力;分别采用RT-PCR法和Western blot法检测大鼠海马组织中的磷脂酰肌醇-3-激酶(PI3K)、蛋白激酶B (Akt)和哺乳动物雷帕霉素靶蛋白(mTOR) mRNA及蛋白表达。结果与假手术组比较,模型组大鼠逃避潜伏期延长,跨越平台次数减少,海马组织PI3K、Akt、mTOR蛋白及mRNA表达升高(P <0. 05或P <0. 01);与模型组比较,中药高剂量组、吡拉西坦组大鼠逃避潜伏期、跨越平台次数增加,海马组织PI3K、AKT、mTOR蛋白及mRNA表达升高(P <0. 05或P <0. 01);中药高剂量组与吡拉西坦组各指标比较差异均无统计学意义(P>0. 05)。结论五脏温阳化瘀汤可以提高血管性痴呆模型大鼠的学习记忆能力,可能是通过调控海马组织PI3K/Akt-mTOR信号通路发挥作用。

Elimination of 1,2-dichloroethane over(Ce,Cr)_x O_2/Nb_2O_5 catalysts: synergistic performance between oxidizing ability and acidity

A series of(Ce,Cr)xO2/Nb2O5 catalysts with different(Ce,Cr)xO2 to Nb2O5 mass ratios were synthesized by the deposition-precipitation method for use in deep catalytic oxidation of 1,2-dichloroethane(DCE), which is one of the typical chlorinated volatile organic compound pollutants. The textural properties were characterized by X-ray diffraction, N2 adsorption/desorption isotherms, UV-Raman spectroscopy, and scanning electron microscopy. The surface acidity and the redox properties were characterized by ammonia temperature-programmed desorption and H2 temperature-programmed reduction, respectively. The results show that the addition of a proper amount of(Ce,Cr)xO2 over Nb2O5 significantly improves the intrinsic catalytic activity towards the deep oxidation of DCE, and only a very small amount of C2H3Cl is detected as the byproduct of the oxidation process. Further study reveals the existence of an obvious synergistic effect between Nb2O5, with abundant strong acid sites, and(Ce,Cr)xO2, with strong oxidation sites, as the strong acid sites of Nb2O5 promote the adsorption and dehydrochlorination of DCE, while the strong oxidation sites of(Ce,Cr)xO2 contribute to the deep oxidation of the reactant, intermediates, and byproducts.

Synthesis of a novel hexagonal porous TT-Nb2O5 via solid state reaction for high-performance lithium ion battery anodes

Hexagonal porous Nb2O5 was synthesized for the first time via a facile solid-state reaction.The structure and electrochemical properties have been optimized through tuning heating temperature.X-ray diffraction results indicate that pseudo hexagonal Nb2O5(TT-Nb2O5)and orthorhombic Nb2O5 have been synthesized at different temperatures.Hexagonal sheet and porous structure of Nb2O5 were characterized by scanning electron microscopy and N2-adsorption-desorption isotherms.The as-prepared TT-Nb2O5(heated at 600℃)shows the best performance with a remarkable charge capacity of 178 mA∙h/g at 0.2C,which is higher than that of T-Nb2O5.Even at 20℃,TT-Nb2O5 offers unprecedented rate capability up to 86 mA∙h/g.The high rate capacity is due to pseudocapacitive Li+intercalation mechanism of TT-Nb2O5.The reported results demonstrate that Nb2O5 with good crystal structure and high specific surface area is a powerful composite design for high-rate and safe anode materials.

Density Functional Theory Calculations of Charge-Induced Spin Polarization in Pentacene

Based on density functional theory （DFT） calculations, we investigate the spin-related properties of spinless-hole injected organic molecule pentacene （Pc）. DFT calculations reveal that there is spontaneous spin polarization in Pc when spinless-hole is injected. The chargeinduced magnetic moment of Pc increases linearly with the increasing of the extra hole charge amount and its maximum can be up to 1 μB per injected spinless-hole per Pc molecule. The magnetic moment is expected due to the injected unpaired charge. The injected hole will preferably ll the spin-splitted carbon pz orbitals, which makes the Pc molecule spin polarize.

Solvothermal Synthesis of V_2O_3 Catalysts for Oxidative Desulfurization of Dibenzothiophene

V2O3 nanoparticles with high surface area have been successfully prepared by a new solvothermal method without using any surfactant and template. The size of V2O3 nanoparticles is mostly equal to 10 nm-30 nm. The highest surface area of obtained V2O3 nanoparticles reaches 49 m2/g. Several kinds of V2O3 catalysts were prepared by different methods. All these V2O3 catalysts obtained thereby showed high catalytic activity for oxidative desulfurization(ODS) reaction by using tert-butyl hydroperoxide as the oxidant. The V2O3 catalyst with a highest ODS activity was obtained under the following conditions: The catalyst was prepared upon using V2O5 as the vanadium source, methanol as the solvent, and oxalic acid as the complexing reagent at a V2O5/oxalic acid molar ratio of 1:2. The process for ODS of dibenzothiophene was carried out under mild conditions(under atmospheric pressure and at a relatively low temperature). The highest ODS activity of the obtained V2O3 nanoparticles can be attributed to their highest surface area.

Dissolution behaviors of Ta_2O_5,Nb_2O_5 and their mixture in KOH and H_2O system

The dissolution behaviors of Ta2O5,Nb2O5 and their mixture in KOH and H2O system were investigated.A L9(34) orthogonal design was used to study the effects of reaction temperature,mass ratio of KOH to Ta2O5,and reaction time on the dissolution rate of tantalum.It was found that the effect of reaction temperature on the dissolution rate of tantalum was much greater than that of the other factors.The results of factorial experiments showed that Ta2O5 was mainly transformed into insoluble potassium tantalate at low temperature(350 ℃) and transformed into soluble potassium tantalate at high temperature(450 ℃).The insoluble potassium tantalate was analyzed by XRD,which was proved to be KTaO3.Differently,almost all Nb2O5 was transformed into soluble potassium niobate at 350-450℃.As for the mixture of Ta2O5 and Nb2O5,the dissolution rate of tantalum increased and the dissolution rate of niobium decreased as an interaction existed between niobium and tantalum.And increasing the mole ratio of Nb2O5 to Ta2O5 in the mixture was beneficial to the dissolution of both Ta2O5 and Nb2O5.In addition,the mechanism of the interaction between niobium and tantalum was also investigated through phase and chemical analysis.

A Novel Technology for Synthesizing Pentasil Zeolites Based on Solid-Solid Mass Transformation Mechanism

A novel technology of preparing zeolites based on solid-solid mass transformation mechanism is developed for the first time. By employing this technology, three different types of highly crystallized pentasil zeolites, ZSM-35 (FER-type), Silicalite-1(MFI-type) and Mordenite(MOR-type), are successfully synthesized in the solid system. In terms of commercial production, the technology-could simplify synthesis procedure and make the continuous production of zeolites possible, so as to improve the productivity. Additionally, it is environmentally friendly because the crystallization occurs in solid phase where there exists no pollution caused by waste liquid. Therefore, this technique provides us with a new industrial process for the clean and continuous production of zeolites. The characteristics in synthesis chemistry and the crystallization mechanism involved in the technology are also discussed.

Soil Aggregates, Organic Matter, and Labile C and N Fractions after 37 Years of N, P and K Applications to an Irrigated Subtropical Soil under Maize-Wheat Rotation

Abstract： Physical, chemical and biological soil properties in surface （0-5 cm） and subsurface soil （5-15 cm） were determined in a field experiment conducted with seven treatments consisted of different combinations of fertilizer N （0, 100 and 200 kg N ha^-1）, P （0, 22 and 44 kg P2O5 ha^-1） and K （0, 41 and 82 kg K2O ha^-1） applied both to summer-grown maize （Zea mays L.） and winter-grown wheat （Triticum aestivum L.） crops continuously for 37 years under irrigated subtropical conditions. Application of N, P and K significantly increased water stable aggregates and had profound effects in increasing the mean weight diameter as well as the formation of macro-aggregates, which were highest in both surface （81%） and subsurface （74%） soil layers with application of 100 kg N ＋ 22 kg P2O5 ＋ 41 kg K2O ha^-1 （N100P22K41）. The N100P22K41 treatment also enhanced total organic C （TOC） from 4.4 g kg^-1 in no-NPK control to 4.8 g kg^-1in surface layer and from 3.3 to 4.1 g kg1 in subsurface layer leading to the 20% higher TOC stocks in 0-15 cm soil. The labile C and N fractions such as water soluble C, particulate and light fraction organic matter, potentially mineralizable N and microbial biomass were also highest under the optimized balanced application of N100P22K41. Relatively higher increase in all labile fractions of C and N as proportion of TOC and total N, respectively suggested that these are potential indicators to reflect changes in management practices long before changes in TOC and TN are detectable. These results demonstrated that optimized balanced application of N, P and K is crucial for improving soil health ensuring long-term sustainability of farming systems in semiarid subtropical soils.

Iodine-doping-assisted tunable introduction of oxygen vacancies on bismuth tungstate photocatalysts for highly efficient molecular oxygen activation and pentachlorophenol mineralization

In this work,the tunable introduction of oxygen vacancies in bismuth tungstate was realized via asimple solvothermal method with the assistance of iodine doping.With the predictions afforded bytheoretical calculations,the as-prepared bismuth tungstate was characterized using various tech-niques,such as X-ray diffraction,Raman spectroscopy,scanning electron microscopy,transmissionelectron microscopy,X-ray photoelectron spectroscopy,electron spin resonance spectroscopy,anduV-Vis diffuse reflectance spectroscopy.The different concentrations of the oxygen vacancies onbismuth tungstate were found to be intensely correlated with iodine doping,which weakened thelattice oxygen bonds.Owing to the sufficient oxygen vacancies introduced in bismuth tungstate as aresult of iodine doping,the molecular oxygen activation was remarkably enhanced,thus endowingbismuth tungstate with high activity for the photocatalytic degradation of sodium pentachloro-phenate.More encouraging is the total organic carbon removal rate of sodium pentachlorophenateover iodine-doped bismuth tungstate that exceeded 90%in only 2 h and was 10.6 times higher thanthat of the pristine bismuth tungstate under visible light irradiation.Moreover,the mechanism,through which the degradation of sodium pentachlorophenate over iodine-doped bismuth tung-state is enhanced,was speculated based on the results of radical detection and capture experiments.This work provides a new perspective for the enhanced photocatalytic degradation of organochlo-rine pesticides from the oxygen vacancy-induced molecular oxygen activation over iodine-dopedbismuth tungstate.

Electrochemical impedance spectra of V_2O_5 xerogel films with intercalation of lithium ion

Vanadium pentoxide xerogel films used for lithium rechargeable batteries were prepared from crystalline c-V2O5 by melt quenching method,then the electrochemical process of lithium intercalation into vanadium pentoxide xerogel films was simulated with an equivalent circuit model, which was derived from the mechanism of electrode reactions. Measured electrochemical impedance spectra at various electrode potentials were analyzed by using the complex non-linear least-squares fitting method. The results show that impedance spectra consist of 2 high-to- medium frequency depressed arcs and a low frequency straight line. The high frequency arc is attributed to the absorption reaction of lithium ions into the oxide film, the medium frequency arc is attributed to the charge transfer reaction at the vanadium oxide/electrolyte interface and the low frequency is characterized by a straight line with a phase angle of 45° corresponding to the diffusion of lithium ion through vanadium oxide phase. The experimental and calculated results are compared and discussed focusing on the electrochemical performance and the state of charge of the electrode. Moreover, the high consistence of the fitted values of the model to the experimental data indicates that this mathematical model does give a satisfying description of the intercalation process of vanadium pentoxide xerogel films.

Extraction and Crystal Structure of Karounidiol

The title compound of karounidiol (C30H48O2), a main active triterpene component of snakegourd seed, was isolated from unsaponifiable matter of the seed oil of Trichosanthes kirilowii Maxim., and characterized by X-ray diffraction analysis. It crystallizes in orthorhombic system, space group P212121 with C30H48O2CH3OHH2O (C31H54O4), a = 7.515(1), b = 14.407(1), c = 27.799(2) , V = 3009.8(5) 3, Z = 4, Dx = 1.087 g/cm3, Mr = 490.77, F(000) = 1088 and = 0.086 mm-1. The final R = 0.0840 and wR = 0.2289 for 2752 observed reflections (|F|2 ≥ 2|F|2). The molecular crystal structure of karounidiol shows relative stereochemistry of (3,13,14, 20)-3,29-dihydroxy-13-methyl-26-norolean-7,9(11)-diene. The molecule is composed of five six- membered rings with ring junctures of A/B trans, C/D trans and D/E cis.

Dechlorination of pentachlorophenol by grinding at low rotation speed in short time

In order to apply grinding method for degradation of pentachlorophenol(PCP) to an industrial scale,the proportion of different materials[CaO,SiO_2 and CO(NH_2)_2]and the size of grinding balls were examined.For saving energy and increasing dechlorination efficiency,the rotation speed and grinding time were maintained at relatively low values.At a mass ratio of grinding balls to materials(40:1),PCP was added into a big steel jar(300 ml) with other materials to grind at 300 r ·min^(-1)for 5 h.The results indicated that when PCP was mixed with CaO and SiO_2in a molar ratio of 1:60:60,the best dechlorination of 58.4%was achieved.CO(NH_2)_2 could not be used as hydrogen donor in the dehalogenation by mechanochemical reaction,since it restrained the dechlorination process.The size of grinding balls has significant effect on the reaction.The experiment with 5 mm steel balls indicates that the weight is too light to provide appropriate energy for the reaction,while steel balls of 10 and 15 mm could give better dechlorination reaction.It indicates that dechlorination depends on the mass of balls and fill rate.

Hydrothermal Synthesis and Crystal Structure of [H_4As_8V_(14)O_(42)(H_2O)]·6H_2O

The title compound [H4As8V14O42(H2O)]6H2O 1 has been synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction analysis. It crystallizes in trigonal, space group R3c with a = b = 36.447(6), c = 21.485(5) ? V = 24717(8) 3, Z = 18, Mr = 2114.66, Dc = 2.557g/cm3, F(000) = 17928, m = 7.149 mm-1, R = 0.0792 and wR = 0.1265. The [H4As8V14O42- (H2O)] cluster consists of fourteen VO5 square pyramids linked by four As2O5 handle-like units.