地聚物改良粗粒土的动力特性试验及土坡地震反应分析研究

针对不同围压不同块石含量的地聚物改良粗粒土,进行一系列固结不排水的大型三轴循环试验。探究了不同块石含量、不同围压和不同剪应变幅值下地聚物改良粗粒土的Gmax以及G/Gmax~γ和λ~γ的演化规律,基于实验结果对地聚物改良粗粒土体动力反应所用到的修正的Davidenkov粘弹性动力本构模型进行了二次开发和子程序编译,以某一代表性边坡作为研究场地,对地聚物改良粗粒土坡在不同地震动作用下的地聚物改良土坡地震反应特性进行了数值模拟,得到了动剪应力、加速度和水平位移反应规律。

经营租赁中租赁物改良之会计处理

当前,我国对租赁物改良的会计处理尚缺乏规范,以致企业在实务中对租赁物改良的会计处理不统一,严重影响了财务报表信息的可信度。本文就企业在租赁物改良实务中的常见问题进行探讨,以期对我国制定全面的租赁会计的处理规范有所裨益。

偏高岭土基地聚物改良土最优配比及固化效果分析

地聚物是一种具有快硬、高强、低收缩等特点的新型绿色胶凝材料,可以用于固化软弱土体。通过对偏高岭土基地聚物改良土开展不同配比下的强度特性试验及扫描电镜试验,探讨了地聚物改良土的最佳配比,分析了地聚物材料组分对改良土力学特性及固化效果的影响。结果表明:地聚物改良土抗压强度随偏高岭土和碱激发剂掺量的增加呈现先增后减趋势,偏高岭土和碱激发剂掺量最优配比为2∶1,且二者在土中的最经济掺入比为12%;相同掺比下的地聚物改良土强度优于普通硅酸盐水泥土和纯黏土,团聚固化效应依次减弱;随着地聚物掺量增加,其破坏模式由塑性剪切破坏向脆性劈裂破坏发展。该研究可为偏高岭土基地聚物改良土的应用推广提供参数设计依据。

改良发色底物法测定胃肠道肿瘤患者外周血单核细胞中组织因子活性

目的 :建立一种简便易行的测定组织因子 (TF)活性的方法 ,研究胃肠道肿瘤患者外周血单核细胞中 TF活性与肿瘤的关系。方法 :采用已商品化的冻干人凝血酶原复合物 (PPSB)作为因子 、 的来源 ,活化的 a水解底物 S2 2 2 2释放对硝基苯胺 ,40 5 nm处的吸光度与标准液中的组织凝血活酶含量成良好的双对数关系 (r =0 .998)。采用此法测定 32例胃癌、45例结直肠癌患者和 30例正常人外周血单核细胞 TF的促凝活性。结果 :该方法简单、灵敏、能定量 ,线性范围大 ;胃肠道肿瘤患者外周血单核细胞的活性明显高于对照组 (P <0 .0 5 ) ,且与肿瘤恶性程度成正比 (P <0 .0 5 )。结论 :检测 TF在外周血单核细胞中的活性水平将有助于评估肿瘤的恶性程度。

纤维地聚物改良土配比设计与固化效果试验研究

地聚物具有快硬早强、耐久性好等优点,是土体改良的理想固化剂,但纤维地聚物改良土可期工程性能却受控于其合理材料配比设计。以偏高岭土为前驱体、生石灰和硅酸钠为碱激发材料制备地聚物材料,开展不同材料配比下的地聚物改良土力学特性试验研究,探讨地聚物理想材料配比设计,分析地聚物改良土体的最优掺量,明确玄武岩纤维掺量与长度对地聚物改良土性能的影响规律,并综合评价地聚物、纤维对土体的固化效果。结果表明,纤维地聚物改良土力学性能随地聚物掺量、纤维掺量、纤维长度增加呈现先增后减变化,当偏高岭土与碱激发剂掺比为2∶1、碱激发剂中硅酸钠与生石灰掺比为1∶0.8、地聚物在土中总掺比为15%、玄武岩纤维掺量和长度分别为0.4%和12 mm时,纤维地聚物改良土力学改良效果最为理想;固化效果对比试验则表明,纤维地聚物改良土的抗压、抗拉、抗剪强度均优于普通水泥土、石灰土和纯黏土。研究成果可为纤维地聚物改良土应用推广提供参考依据。

改良黄芪桂枝五物汤治疗产后风湿病研究

产后风湿病,俗称"月子病",多因妇女产后体虚、感受风寒湿邪、营卫失调,营血不足所致。以改良黄芪桂枝五物汤治疗产后风湿病患者62例,总有效率为93.5%,与对照组(总有效率为61.1%)相比较,差异极显著(P<0.01).

改良眼内容物摘除联合义眼座植入术

我们自1997年以来采用改良眼内容物摘除联合义眼座植入术治疗需行眼球摘除患者52例，其效果优于传统眼内容物摘除或眼球摘除联合义眼座植入术。

新改良充气密闭式取物袋在腹腔镜手术中的应用

目的研究新改良充气密闭式取物袋在腹腔镜手术中的应用效果。方法2018年3月至2018年12月我院收治的普通妇科手术住院患者60例,按数字随机法分为对照组和改良组,每组各30例,改良组采用腹腔镜手术及新改良充气密闭式取物袋为30例患者行子宫肌瘤剔除术治疗,对照组采用传统腹腔镜下行子宫肌瘤剔除术治疗,观察手术时间、术中出血量及术后并发症等情况。结果与对照组相比,改良组的手术时间、取肌瘤时间及手术中出血量都少于对照组,差异有统计学意义(P<0.05);与对照组相比,改良组并发症发生率6.66%低于对照组30%,患者出院后3个月后随访发现,改良组仅有1例月经异常,无肌瘤再发、盆腔占位等症状;对照组中有3例月经异常、2例盆腔占位、1例肌瘤再发,差异有统计学意义(P<0.05)。结论新改良充气密闭式取物袋在腹腔镜手术中可有效避免肿瘤组织取出时因旋切造成的盆腔肿瘤种植或外溢于腹腔,降低腹腔及切口污染机会,具有很高的实用价值及社会经济效益,而且便于在医疗行业中推广应用。

税收的土地资源配置效应研究

税收在鼓励节约使用土地资源、调整土地收益分配关系、调整土地利用方向、保护土地资源的生产能力等方面功能显著。理论模型分析结果表明:对土地和土地改良物征收从量税,除了能增加税收收入以外,起不到优化土地资源配置的作用。对土地和土地改良物征收从价税,可以影响到政府和开发商的投资决策,从而可以达到提高土地资源配置效率的政策目标。从目前实际情况看,在土地开发以后,按期实行从价税率,对土地课以重税,对土地改良物课以轻税是理想的选择。

Graft-induced Inheritable Variation in Mungbean and Its Application in Mungbean Breeding

Graft can induce inheritable variations in the progenies of the scion plants. Seedling of mungbean ( Vigna radiata (L.) Wilczek) was grafted onto the stem of sweet potato ( Ipomoea batatas (L.) Lam.). The growth of the scion was maintained until the scion produced selfed seeds. We sowed the seeds for several generations under normal conditions. Distinct genetic variations appeared in the progenies. Similar variations did not appear in the generations of the scion sowed normally without graft. The variations seemed to be induced by the graft and they inherited steadily. For understanding the possible mechanism of the phenomenon (graft_induced inheritable variation), we analyzed the cytoplasmic and genomic DNA of the variations. The results showed that there was no restriction fragment length polymorphism (RFLP) in the cytoplasmic DNA between the original scion and the variation. However, significant difference between the scion and variation was recognized by random amplified polymorphic DNA (RAPD) analysis. In addition, there was no evidence that indicated the gene transformation from stock to scion. Our results suggest that the non_specific grafting has a pragmatic potential for plant breeding and crop improvement and, the genetic variation seems not to be caused simply by DNA transformation but most likely the stress induced mutation.

Remediation of in-situ Leach Mining Contaminated Soil by Amendment-plant Synergism

This study aimed to remediate in-situ leach mining contaminated soil by amendment-plant synergism. The results showed that plant species exhibited ex-tremely significant effects on the concentration of nitrate nitrogen; to be specific, the concentration of nitrate nitrogen in soil planted with wheat was reduced from 692.19 mg/kg to lower than 100 mg/kg; when the mass ratio of amendment to soil reached 3：50 and the amendment particle size was 1-2 mm, the concentration of nitrate ni-trogen in soil planted with wheat was reduced to 43 mg/kg. The amendment type exhibited extremely significant effects on the concentration of ammonium nitrogen; to be specific, when the mass ratio of amendment to soil reached 10：50, the concen-tration of ammonium nitrogen in soil added with 2-3 mm zeolite was reduced from 23 593.75 to 3 300 mg/kg on day 15. Amendments and plants mainly exhibited desorption performance for sulfate radical in soil, and the amendment type extreme-ly significantly affected the concentration of sulfate radical; to be specific, the con-centration of sulfate radical in soil added with limestone increased from 370 mg/kg to 900 mg/kg on day 7.

Effects of Biochar on Tobacco-planting Soil Improvement and Tobacco Quality in Mudanjiang Area

This study was conducted to study the feasibility of biochar in soil im- provement and tobacco quality. The black soil in NinganCountry of Mudanjiang was used as the material in this study, and the effects of biochar on tobacco-planting soil C/N, soil microorganisms, the development of tobacco, and chemical compo- nents and neutral aroma components in flue-cured tobacco werestudied. The results showed that the application of biochar at a rate of 1 800 kg/hm2 could increase soil C/N by 31.79%, and the quantity of actinomycetes in the soil was 3.8 times as much as that in control. The growth wasobviously better after biochar application, plant height and effective leaf number were significantly higher than those ofcontrol, but total sugar and nicotine were not significantly different. The application of biochar at a rate of 1 200 kg/hm2 increased the potassium content by 11%, the application of biochar at a rate of 2 400 kg/hm2 improved total sugar content by 5.40%, and the application of biochar at a rate of 1 800 kg/hm2 made the tobacco solanone content 1.97 times as that of control. Comprehensive studies showed that the application of biochar 1 200-1 800 kg/hm2 could improvesoilenvironment, and promote tobacco growth and quality.

A Method Suitable for Extracting Genomic DNA from Animal and Plant——Modified CTAB Method

[Objective] The study aimed to introduce a rapid and effective method that is suitable for extracting genomic DNA from animal and plant. [ Method ] The genomic DNAs were extracted from tender leaves of 24 peanut cuhivars and from the liver, lung and kidney of white mouse through the specifically modified CTAB method. The DNAs were run on agarose gel, next detected by DNA/Protein analyzer. Finally PCR amplification was conducted to detect the quality of DNAs extracted using the modified CTAB method. [ Result] The clear and orderly bands were observed in gel detection, and the values of OD200/OD200 for DNAs extracted via modified CTAB method were between 1.77 - 1.83. The DNAs performed well in PCR amplification. [ Conclusion] The DNAs extracted by modified CTAB method could satisfy the requirement of PCR amplification.

Effect of amendments on growth and metal uptake of giant reed(Arundo donax L.) grown on soil contaminated by arsenic,cadmium and lead

The effects of five amendments such as acetic acid（AA）, citric acid （CA）, ethylenediamine tetraacetic acid （EDTA）, sepiolite and phosphogypsum on growth and metal uptake of giant reed （Arundo donax L.） grown on soil contaminated by arsenic （As）, cadmium （Cd） and lead （Pb） were studied. The results showed that the shoot biomass of giant reed was enhanced by 24.8% and 15.0%, while superoxide mutase and catalase activities slightly varied when adding 5.0 mmol/kg CA and 2.5 mol/kg EDTA to soil as compared to the control, respectively. The concentrations of As, Cd and Pb in shoots were remarkably increased by the addition of 2.5 mmol/kg AA and CA, 5.0 mmol/kg EDTA, and 4.0 g/kg sepiolite as compared to the control. The accumulations of As and Cd were also significantly enhanced in the above condition, while the shoot Pb accumulation was noticeably enhanced by amending with 4.0 g/kg sepiolite and 8.0 g/kg phosphogysum, respectively. The results suggested that AA, CA and sepiolite could be used as optimum soil amendments for giant reed remediation system.

关于征收城市地价税的探讨

一、关于土地市场日前,理论界对城市土地的有偿使用和有偿转让的认识,在原则上是一致的,只是在具体实行的方式上有重大分歧。其焦点在于能否允许土地买卖、允许开放土地市场。这是改革现行土地管理体制的根本问题,也是发展城市房地产业的关键所在。要深入探讨这个问题,必须联系我国的现实和商品经济对土地经济运行的客观要求。

Telomerase Activity in Human Renal Cell Carcinoma with Reference to Clinicopathologic Features

Objective: To study the telomerase activity in human renal cell carcinoma and to evaluate the correlation with the clinicobiologic features of the neogrowth.Methods: The telomerase activity was studied by means of a modified telomeric repeat amplification protocol (TRAP) in 32 renal cell carcinoma tissues, 32 normal renal tissues and 32 paracancer tissues and its correlation with the clinicopathologic features of the tumor was evaluated.Results: Telomerase activity was strongly positive in 17, positive in 12 and negative in 3 cases of renal cell carcinoma tissues, the total positive rate being 91%. Telomerase activity was weakly positive (6%) in only 2 out of 32 samples of normal renal cortex tissues and positive in 6 paracancer tissues (19%), the difference was conspicuous (P<0.01).Conclusion: The positive rate of telomerase activity was significantly higher in renal cell carcinoma tissues and might serve as a prognostic marker for estimating the biologic characteristics of renal cell carcinoma.

Advance of entomopathogenic nematodes

This paper summarized the history and present condition of studying and utilizing entomopathogenic nematodes at home and abroad, expounded its taxonomy, life cycle and the mechanism with symbiotic bacteria killing host insect. Taxonomy, mycelial form, pathogenic function and anti-bacteria function of symbiotic bacteria were introduced. Production and utilization of entomopathogenic nematodes, the characteristic genetic improvement by use of biological engineering technology, as well as the existing problem and applying foreground were also discussed.

Biochar Applied with Organic Fertilizer Improves Alkaline Soil Properties and Crop Yield

Biochar(BC)is widely applied in agricultural production for its multiple uses such as carbon sequestration.However,application of BC alone has limited effect on soil fertility and crop yield,especially alkaline soil.Therefore,a pot experiment on Chinese cabbage(Brassica rapa var.glabra)was carried out in this study to investigate the effect of BC applied with organic fertilizer(OF)on alkaline soil properties and crop yield.To be specific,BC and OF were respectively applied at 0,1%,2%,and 3%,and Chinese cabbage was transplanted and cultivated for 2.5 months.Results showed that BC and OF increased the content of both organic matter and available P in alkaline soil(P<0.05).Moreover,the application of OF alone decreased the pH value but raised available N content of alkaline soil,and the application of only BC demonstrated the contrary effect(P<0.05).OF significantly improved crop yield(P<0.05),but the effect of BC was insignificant.Crop yield was the highest under the treatment of 1%BC and 3%OF.Thus,BC had limited effect on alkaline soil fertility and crop yield,but the application with OF was a good option for ameliorating alkaline soil and raising crop yield.

Effect of substrate amendment on alkaline minerals and aggregate stability in bauxite residue

Bauxite residue is an alkaline waste material in the process of alumina production due to its characteristics of higher salinity and alkalinity,which results in environmental issues and extremely restricts the sustainable development of alumina industries.In this work,we conduct a column experiment to study the effects of two amendments on aggregate stability and variations in alkaline minerals of bauxite residue.The two amendments are phosphogypsum(PG)and phosphogypsum and vermicompost(PVC).The dominant fraction in aggregate is 1–0.25 mm in diameter on the surface,which takes up 39.34%,39.38%,and 44.51%for CK,PG,and PVC,respectively.Additions of PG and PVC decreased pH,EC,ESP,exchangeable Na^+concentration and the percentage of alkaline minerals,and then increased exchangeable Ca^2+concentration in bauxite residue.There was significant positive correlation between pH and exchangeable Na^+concentration,the percentage of cancrinite,tricalcium aluminate and calcite;while negative correlation was found in pH value versus exchangeable Ca^2+concentration.Theses findings confirmed that additions of phosphogypsum and vermicompost have a stimulative effect on aggregate stability in bauxite residue.In particular,amendment neutralization(phosphogypsum+vermicompost)in column represents an advantage for large-scale simulation of vegetation rehabilitate in bauxite residue disposal areas.