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肥胖儿童non-HDL-C、remnant cholesterol与亚临床动脉粥样硬化的关系 被引量:4
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作者 焦朝艳 刘戈力 +4 位作者 鲍鹏丽 魏莹 杨箐岩 郑荣秀 赵菁 《天津医科大学学报》 2014年第1期25-28,共4页
目的:了解non-HDL-C和remnant cholesterol与肥胖儿童亚临床动脉粥样硬化(AS)的关系。方法:根据甘油三酯(TG)水平将65例肥胖儿童(肥胖组)分为I组(TG≥2.3 mmol/L)32例,II组(TG<2.3 mmol/L)33例,与肥胖组儿童性别年龄相匹配的正常体... 目的:了解non-HDL-C和remnant cholesterol与肥胖儿童亚临床动脉粥样硬化(AS)的关系。方法:根据甘油三酯(TG)水平将65例肥胖儿童(肥胖组)分为I组(TG≥2.3 mmol/L)32例,II组(TG<2.3 mmol/L)33例,与肥胖组儿童性别年龄相匹配的正常体质量儿童30例为III组(对照组)。比较3组儿童血脂指标,对肥胖组各项血脂指标与血浆致动脉粥样硬化指数(AIP)进行相关性分析,肥胖患儿体质指数、血脂指标与颈动脉内径、内膜-中层厚度(c-IMT)、血流参数进行相关性分析。结果:I组、II组的TG、总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、non-HDL-C、remnant cholesterol、AIP均较对照组升高,高密度脂蛋白胆固醇(HDL-C)较对照组降低,且I组的remnant cholesterol、AIP均较II组升高。肥胖组儿童AIP与TG、non-HDL-C、remnant cholesterol呈正相关,与HDL-C呈负相关。37例行颈动脉超声检查的肥胖儿童的c-IMT较正常儿童的增厚。结论:non-HDL-C、remnant cholesterol在肥胖儿童亚临床AS中有重要作用,在肥胖儿童血脂异常的治疗中应关注non-HDL-C、remnant cholesterol的变化。 展开更多
关键词 儿童肥胖 亚临床动脉粥样硬化 non—HDL—C REMNANT CHOLESTEROL 血浆致动脉粥样硬化指数 颈动脉内膜-中层厚度
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Shenqi Fuzheng injection combined with GP chemotherapy in the treatment of advanced non-small cell lung cancer: a meta-analysis 被引量:13
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作者 Qiang Zhang Yi-Huan Fan +2 位作者 Teng Zhang Xiao-Lan Qin Ji-Fang Song 《TMR Integrative Medicine》 2017年第2期68-78,共11页
Objective: To evaluate the clinical efficacy of Shenqi Fuzheng injection combined with gemcitabine plus cisplatin(GP) in the treatment of advanced non-small cell lung cancer (NSCLC). Methods: we performed a syst... Objective: To evaluate the clinical efficacy of Shenqi Fuzheng injection combined with gemcitabine plus cisplatin(GP) in the treatment of advanced non-small cell lung cancer (NSCLC). Methods: we performed a systematicsearch in the electronic databases such as Cochrane Library, Pubmed, Embase, Chinese Journal Full-text Database,Chinese Biomedical Literature Database, Chinese Science and Technology Periodical Full-text Database andWanfang Database up to 30 January 2017. Randomized controlled trials (RCT) of Shenqi Fuzheng Injectioncombined with GP chemotherapy in the treatment of advanced NSCLC were searched, and all the RCTs wereconducted on methodological quality assessment. Data extraction and data analysis were according to standards ofCochrane systematic review. Results: Eight trials were included including a total of 701 patients. Meta-analysisresults: Shenqi Fuzheng injection combined with GP chemotherapy could significantly improve the functionalstatus of patients with NSCLC (OR = 3.44, 95% CI [2.26, 5.25], P 〈 0.0001) and clinical treatment efficacy (OR =(OR = 0.31, 95%CI [0.20, 0.47], P 〈 0.0001. The rate of leukopenia (OR = .31, 95%CI [0.20,0.47], P 〈 0.0001),thrombocytopenia (OR = 0.58, 95%CI [0.37, 0.91], P = 0.020), hemoglobin decline ((OR = 0.31, 95%CI [0.16,0.59], P = 0.0004) and incidence of gastrointestinal reactions (OR = 0.58,P 〈 0.05) could be reduced. Conclusion:Shenqi Fuzheng injection combined with GP chemotherapy in the treatment of advanced NSCLC obtainedsignificantly clinical efficacy. The quality of the literature incorporated is low, the conclusion requires high-qualityresearch to further prove. 展开更多
关键词 Shenqi Fuzheng GP chemotherapy Advanced non - small cell lung cancer Meta analysis
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Analysis of Numerical Results in High Temperature Congealment and Chemistry Non-equilibrium Flow Field
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作者 Hong-tao Zheng Zhi-yong Tan +2 位作者 Hai-ou Sun Chun-liang Zhou Zhi-ming Li 《Journal of Marine Science and Application》 2002年第1期26-34,共9页
Using the air plasma ignition technique, physicochemical process of burning can be accelerated; concentration limit ofretrofires both can be extended; reliability of retrofires and stability of burning can be improved... Using the air plasma ignition technique, physicochemical process of burning can be accelerated; concentration limit ofretrofires both can be extended; reliability of retrofires and stability of burning can be improved. In this paper, using internalequivalent heat area in place of electric are that created Ohm heat, the flow fields of thermodynamic equilibrium chemistry con-gealment and chemistry non-equilibrium in the plasma generator were simulated. The influences of the inlet prerotation angleof air, the inlet total pressure of air and the airflow compression angle of spray nozzle on the temperature on the surface of elec- 展开更多
关键词 plasma GENERATOR CHEMISTRY non - EQUILIBRIUM IGNITION technique numerical calculation
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Turbulent Flow Action of Pulp in Wet - Laid Non - Woven Processes
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作者 程隆棣 黄秀宝 于修业 《Journal of China Textile University(English Edition)》 EI CAS 2000年第3期57-59,共3页
The paper deals with the fluid field of web forming in wet-laid non-woven production.The influence of the turbulent flow on blending fiber and occluded fluid produced in pulp flow has been discussed in theory and prac... The paper deals with the fluid field of web forming in wet-laid non-woven production.The influence of the turbulent flow on blending fiber and occluded fluid produced in pulp flow has been discussed in theory and practice.The suitable use of the imported velocity of pulp is very important in producing wet-laid products of good quality. 展开更多
关键词 WET - laid non - woven fiber PULP FLOW TURBULENT FLOW layer FLUID occluded FLUID .
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CYFRA 21-1 as an early predictor of first line chemotherapy response in advanced non small cell lung cancer
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作者 Kashif Iqbal 《The Chinese-German Journal of Clinical Oncology》 CAS 2007年第3期250-253,共4页
Objective: In an era of ever evolving, promising new therapies for advanced non small cell lung cancer (NSCLC), early predictors of response to therapy, are needed. We evaluated early variations in CYFRA 21-1 serum... Objective: In an era of ever evolving, promising new therapies for advanced non small cell lung cancer (NSCLC), early predictors of response to therapy, are needed. We evaluated early variations in CYFRA 21-1 serum levels of patients with advanced NSCLC receiving first line chemotherapy and correlated the results with objective tumor response. Methods: 29 consecutive, previously untreated, patients of advanced non small cell lung cancer, with measurable disease on CT scan were evaluated. All patients were treated with conventional systemic chemotherapy, although the choice of chemotherapy was left to the discretion of the treating physicians. Serum samples were obtained immediately before the start of 1st and 2nd cycles of chemotherapy. CYFRA 21-1 was measured with an electrochemiluminescense immunoassay on an automatic analyzer (Elecsys 2000; Roche Diagnostics). Response was evaluated using Response evaluation criteria in solid tumors (RECIST) criteria. Results: 10 patients had partial response, 9 patients had stable disease and 9 had progressive disease. None of the patients had complete response. 21/29 (72%) patients had an elevated baseline value of CYFRA 21-1.62% patients (18/29) had a decrease in CYFRA 21-1 after 1 cycle of chemotherapy. The average reduction in the 2nd reading was irrespective of whether baseline value was normal or not. The average reduction was statistically significant (P = 0.002; 95% CI, from 0.8369 to 3.49464; t test). 8 out of 10 (80%) patients with partial response had a reduction in their 2nd reading of. CYFRA (P = 0.019; 95% CI, from 0.81965 to 7.20035; t test) which was significant. We also observed that 6/9 (66%) patients whose disease remains stable also had a decrease in their subsequent reading (P = 0.0106; 95% CI, from -0.44942 to 3.82720; t test), though it was not significant statistically. Although 5 out of 9 (55%) patients, who had an increase in their CYFRA 21-1 level, had progressive disease, but it was not statistically significant (P = 0.537; 95% CI, from -1.20021 to 2.13354; ttest). 14 out of 19 (73%) who either had partial response or had stable disease, had a reduction in their 2nd value of CYFRA 21-1 and was significant statistically (P = 0.004; 95% CI, from 0.74792 to 3.50208; t test). We also observed that except for 1 patient, all patients who had a decrease of 42% or more in their subsequent CYFRA 21-1 level, were those who had either responded to chemotherapy or had stable disease (P = 0.001), which was statistically significant. Conclusion: We can conclude that monitoring of serum marker CYFRA 21-1, early dudng first-line chemotherapy may be a useful prognostic tool for evaluation of early tumor response in patients with advanced NSCLC. 展开更多
关键词 CYFRA 21-1 non small cell lung cancer CHEMOTHERAPY RESPONSE
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MiR-16-5p plays an inhibitory role in human non-small cell lung cancer through Fermitin family member 2
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作者 JUNQI GUO YUN YANG +6 位作者 WEI ZHAO ZHONGHAI YAN XIA YANG YUNFEI YAN RUIMIN HAO JINXIA HU FEI JIAO 《BIOCELL》 SCIE 2021年第3期627-638,共12页
Increasing evidence indicates that aberrant expressions of some microRNAs are associated with cancer progression.However,the roles and biological mechanisms of miRNA-16-5p in human non-small cell lung cancer(NSCLC)are... Increasing evidence indicates that aberrant expressions of some microRNAs are associated with cancer progression.However,the roles and biological mechanisms of miRNA-16-5p in human non-small cell lung cancer(NSCLC)are not to be well studied.Here,we validated that the expression of miR-16-5p was decreased significantly in NSCLC samples and cell lines.The correlation between the clinicopathological features of NSCLC and the miR-16-5p expression showed that the expression of miR-16-5p in non-small cell lung cancer was linked with the advanced TNM stage,positive lymph node metastasis,with short overall survival(OS).Also,a negative correlation between miR-16-5p and Fermitin family member 2(FERMT2)was observed,implying there may be a potential link about their regulation.The hypothesis was further confirmed by in-silico analysis and dual-luciferase reporter assay.Moreover,we demonstrated that the transfections of miR-16-5p mimics could alter some biological characteristics of NSCLC cells remarkably accomplished by the expression variance of FERMT2 in vitro and in vivo assays.Summarily,this study demonstrated that miR-16-5p,as a tumor suppression factor in NSCLC by targeting FERMT2,could serve as one promising biomarker in the prediction for NSCLC patients. 展开更多
关键词 miR-16-5p non–small-cell lung cancer(NSCLC) Fermitin family member 2(FERMT2) APOPTOSIS INVASION Overall survival(OS)
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免蒸养超高性能混凝土-既有混凝土界面粘结性能试验研究 被引量:1
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作者 吴琛 储福玮 +1 位作者 龚明子 曾志攀 《材料导报》 CSCD 北大核心 2023年第24期159-166,共8页
免蒸养超高性能混凝土(Ultra-high performance concrete,UHPC)在常温养护下具有超高强、超耐久等优异性能,其与普通混凝土(Normal concrete,NC)界面的粘结性能是保证免蒸养UHPC加固NC结构获得良好性能的重要因素。为研究免蒸养UHPC-NC... 免蒸养超高性能混凝土(Ultra-high performance concrete,UHPC)在常温养护下具有超高强、超耐久等优异性能,其与普通混凝土(Normal concrete,NC)界面的粘结性能是保证免蒸养UHPC加固NC结构获得良好性能的重要因素。为研究免蒸养UHPC-NC界面粘结性能,设计直剪试验,分析免蒸养UHPC龄期、NC强度、NC表面处理方式和界面粘结剂对界面粘结性能的影响,提出了免蒸养UHPC-NC界面粘结-滑移本构模型,并给出相关刚度系数建议值。结果表明:免蒸养UHPC-NC试件界面破坏模式主要分为粘结界面破坏、粘结界面和NC破坏、NC破坏及NC和UHPC破坏;刻槽组较凿毛组试件具有明显的开裂阶段,表现出一定的延性且具有更高的粘结强度,最大提高量为183.7%;界面使用SiKa 32LP结构胶时,其粘结强度为4.91 MPa,是其他界面粘结剂试件粘结强度的两倍以上。因此,当采用免蒸养UHPC加固NC构件时建议NC表面刻槽和采用SiKa 32LP结构胶。 展开更多
关键词 免蒸养超高性能混凝土(免蒸养UHPC) 粘结性能 直剪试验 荷载-滑移曲线 粘结-滑移本构模型
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高掺量煤气化渣制备免蒸压加气混凝土 被引量:1
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作者 李颖 李辉 +1 位作者 吴锋 李肽脂 《洁净煤技术》 CAS CSCD 北大核心 2024年第7期154-161,共8页
为实现煤气化渣资源化利用,以煤气化渣为主要原料,高盐废水作拌合水,辅以Ca(OH)_(2)和NaOH制备出免蒸压加气混凝土。前期用正交试验和单因素试验方式,制备煤气化渣基胶凝材料。选取强度最高配比作为加气混凝土基体材料配比。主要研究双... 为实现煤气化渣资源化利用,以煤气化渣为主要原料,高盐废水作拌合水,辅以Ca(OH)_(2)和NaOH制备出免蒸压加气混凝土。前期用正交试验和单因素试验方式,制备煤气化渣基胶凝材料。选取强度最高配比作为加气混凝土基体材料配比。主要研究双氧水和硬脂酸钙对加气混凝土物理力学性能及孔结构影响,并用XRD及SEM等微观检测方法分析不同养护温度加气混凝土的水化产物。结果表明:以煤气化渣的质量基准,外掺入占煤气化渣总量10%的NaOH、10%的Ca(OH)_(2),拌合水为高盐废水,煤气化渣基胶凝材料28 d抗压强度最高,达68.8 MPa。此外,向该胶凝材料中掺入双氧水作发气剂、硬脂酸钙作稳泡剂,制备出免蒸压加气混凝土。随双氧水掺量增加,加气混凝的孔径逐渐增大,连通孔增多,故干密度和强度一同降低。加入适量硬脂酸钙后,孔分布更均匀且孔的形态趋于规则的圆形,故强度明显提升。当双氧水和硬脂酸钙的掺量分别为5%、1.5%,养护温度80℃时加气混凝土的抗压强度最高,达2.9 MPa,对应干密度617.2 kg/m^(3)。微观分析表明:高掺量煤气化渣基加气混凝土的水化产物主要为C-S-H凝胶、C-A-H凝胶和沸石。孔壁处主要为相互交错重叠的箔片状C-S-H凝胶,存在少量杂乱交织的细长针棒状C-S-H凝胶。这些水化产物相互交联,使孔壁结构较为密实,利于强度的提高。 展开更多
关键词 煤气化渣 免蒸压加气混凝土 双氧水 硬脂酸钙 养护温度
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基于正交试验的免蒸压加气混凝土的制备与性能优化
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作者 刘小荟 彭晓彤 +2 位作者 汪洪伟 李维海 王鹏 《中国粉体技术》 CAS CSCD 2024年第6期74-84,共11页
【目的】制备轻质高强、节能保温的免蒸压加气混凝土,寻找最优制备配合比,提高固体废弃物的利用率。【方法】基于正交试验采用极差分析和矩阵关联分析的方法确定免蒸压加气混凝土的基础最优配比,优化玻璃粉的掺入量来实现加气混凝土性... 【目的】制备轻质高强、节能保温的免蒸压加气混凝土,寻找最优制备配合比,提高固体废弃物的利用率。【方法】基于正交试验采用极差分析和矩阵关联分析的方法确定免蒸压加气混凝土的基础最优配比,优化玻璃粉的掺入量来实现加气混凝土性能的提升。【结果】各因素对免蒸压加气混凝土的表观干密度和抗压强度的影响程度由大到小为铝粉掺量(质量分数,下同)、水泥掺量、水料比、聚丙烯纤维(PP纤维)掺量,加气混凝土的基础最优配比为水泥掺量为24%,水料比为0.44,铝粉掺量为0.13%,PP纤维掺量为0.4%;当玻璃粉质量替代率达到25%时,混凝土的综合性能达到最优。【结论】玻璃粉作为粉煤灰的替代材料,在改善免蒸压加气混凝土干密度、抗压强度、导热系数方面效果显著。 展开更多
关键词 免蒸压加气混凝土 玻璃粉 干密度 抗压强度 导热系数 正交试验
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免蒸压PHC管桩混凝土的制备及管桩生产技术研究综述
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作者 卿婷 龚磊 +4 位作者 夏艳晴 王宁 阳黎 朱梦 田晓苏 《混凝土与水泥制品》 2024年第2期41-45,共5页
为加大推动管桩行业向节能降碳、高质量发展,综述了免蒸压PHC管桩混凝土的原材料选择、配合比设计以及管桩成型工艺、养护制度、施工方法等技术,并对未来发展方向进行了展望。
关键词 免蒸压 PHC管桩 原材料 配合比 施工方法 养护制度
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聚羧酸外加剂对管桩开模免蒸压混凝土和易性的影响
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作者 吉飞 李伟 +1 位作者 邵楷模 杨凯 《混凝土世界》 2024年第2期25-30,共6页
针对聚羧酸外加剂在管桩开模免蒸压生产中对混凝土和易性敏感,无法量化表征,混凝土操作性差,强度波动大等问题,利用不同聚羧酸母液及功能型助剂的复配技术,并掺加高性能活性粉HPAP,通过将开模混凝土的水胶比提高0.02后,测定倒坍时间、... 针对聚羧酸外加剂在管桩开模免蒸压生产中对混凝土和易性敏感,无法量化表征,混凝土操作性差,强度波动大等问题,利用不同聚羧酸母液及功能型助剂的复配技术,并掺加高性能活性粉HPAP,通过将开模混凝土的水胶比提高0.02后,测定倒坍时间、扩展度、含气量、抗压强度等指标,确定最佳外加剂配比。试验及试桩结果表明:该方法可以科学有效地评价低水胶比、半干硬性混凝土的和易性,试桩的脱模强度即可达到80 MPa以上,3 d强度最高达99.8 MPa,管桩内壁、外观均较佳。 展开更多
关键词 聚羧酸外加剂 管桩 免蒸压 和易性 评价方法
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FAREY SEQUENCE OF NONLINEAR DIFFERENTIAL DYNAMIC SYSTEM IN TWO DIMENSIONS 被引量:1
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作者 H. Q. Jin and S. N. Xu Shenyang Institute of Technology , Shenyang 110015 , China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1999年第5期1234-1236,共3页
In this paper , through the discrim ination of Farey sequence in the forced Brusselator withweak coupling , it is proved that there is a topological translation fro m a nonlinear differen tial system ( limit cycle)... In this paper , through the discrim ination of Farey sequence in the forced Brusselator withweak coupling , it is proved that there is a topological translation fro m a nonlinear differen tial system ( limit cycle) to the circle m ap . 展开更多
关键词 non - linearity Farey sequence phase lock CHAOS
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Ways to Overcome Anxiety in the English Listening Class in College (SUN JING-YU KE SU-FEN)
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作者 孙晶玉 柯素芬 《呼伦贝尔学院学报》 1999年第1期74-77,87,共5页
In my ten-yeat experience of tenching English as major in college , I feel that students experience more difficulties in listening lessons than in other lessons. What, then, prevents students from achieving success in... In my ten-yeat experience of tenching English as major in college , I feel that students experience more difficulties in listening lessons than in other lessons. What, then, prevents students from achieving success in the listening class? I suggest that anxiety is one of the major factors, which interferes with students listening comprehension. And I would agree with writers such as Gardner and Horwitz et al. (1991)that anxiety may impede learner’s ability to perform successfully in all aspects of learning a foreign language. I feet it is particularly significant for listening. 展开更多
关键词 LISTENING anxiety creation of non - ANXIETY environment skills and process focus COUNSELLING corner exposure to authentic English
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硅锰渣复合粉煤灰制备免蒸压加气混凝土 被引量:2
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作者 孙鑫蕊 王学志 +1 位作者 辛明 贺晶晶 《金属矿山》 CAS 北大核心 2023年第1期289-295,共7页
以不同取代率的硅锰渣复合粉煤灰作为硅质原料,采用免蒸压工艺制备加气混凝土,对比了不同掺量的硅锰渣对免蒸压加气混凝土干密度、含水率、吸水率、抗压强度等性能的变化规律;对性能指标进行无量纲处理,建立免蒸压加气混凝土的性能指标... 以不同取代率的硅锰渣复合粉煤灰作为硅质原料,采用免蒸压工艺制备加气混凝土,对比了不同掺量的硅锰渣对免蒸压加气混凝土干密度、含水率、吸水率、抗压强度等性能的变化规律;对性能指标进行无量纲处理,建立免蒸压加气混凝土的性能指标多因素影响回归模型,通过偏相关性分析,得到不同性能指标与自变量的相关性程度;并采用扫描电镜(SEM)对不同配合比加气混凝土的内部微观形貌及孔结构进行分析。结果表明,随硅锰渣掺量的增加,加气混凝土干密度增大,而含水率、吸水率变化幅度相对较小,抗压强度则随硅锰渣及硅灰掺量增加及水胶比的变化而呈现不同的趋势;随硅锰渣掺量的增加,加气混凝土水化产物中托贝莫来石晶体数量减少,气孔多呈现连通状态或扁平状态;当粉煤灰与硅锰渣质量比为3∶1时,加气混凝土抗压强度最高;在硅锰渣掺量为100%,水胶比为0.35时,试件仍能满足A5.0级要求,从绿色环保及综合利用大宗固废的角度考虑,在制备加气混凝土过程中,尽量大程度掺加硅锰渣是可行的。 展开更多
关键词 硅锰渣 粉煤灰 免蒸压加气混凝土 水胶比 回归分析 微观结构 孔结构
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流变性对高早强泡沫混凝土性能的影响 被引量:1
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作者 凌建祥 董波 +1 位作者 叶焕 韩意 《混凝土与水泥制品》 2023年第7期70-74,共5页
为降低泡沫混凝土生产过程中的能耗,改善泡沫混凝土的性能,研究了流变性对高早强免蒸压泡沫混凝土发气效果和硬化后性能的影响。结果表明:当屈服应力超过200 Pa后,泡沫混凝土不再膨胀;高早强免蒸压泡沫混凝土的6 h抗压强度可以达到2.7 M... 为降低泡沫混凝土生产过程中的能耗,改善泡沫混凝土的性能,研究了流变性对高早强免蒸压泡沫混凝土发气效果和硬化后性能的影响。结果表明:当屈服应力超过200 Pa后,泡沫混凝土不再膨胀;高早强免蒸压泡沫混凝土的6 h抗压强度可以达到2.7 MPa,导热系数基本不大于0.20 W/(m·K);浆体的屈服应力偏小可能导致孔隙率(体积密度)相近的泡沫混凝土导热系数相差30%,抗压强度相差100%左右。 展开更多
关键词 流变性 免蒸压 泡沫混凝土 导热系数
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钼尾矿免蒸压砖的制备及性能研究 被引量:1
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作者 万欣娣 王今华 +4 位作者 李建伟 马炎 张茂亮 杜渐 张冰 《新型建筑材料》 2023年第3期91-94,共4页
以钼尾矿、矿粉为主要原料,消石灰和水玻璃为激发剂,采用振动成型法制备了免蒸压砖,研究了钼尾矿用量、养护温度、激发剂种类及用量等因素对免蒸压砖抗压强度的影响,通过SEM、EDS表征了不同龄期的水化产物,分析了其强度形成机理。结果表... 以钼尾矿、矿粉为主要原料,消石灰和水玻璃为激发剂,采用振动成型法制备了免蒸压砖,研究了钼尾矿用量、养护温度、激发剂种类及用量等因素对免蒸压砖抗压强度的影响,通过SEM、EDS表征了不同龄期的水化产物,分析了其强度形成机理。结果表明:在钼尾矿-矿粉-石灰体系中,添加水玻璃可以提高石灰常温下的碱激发效果,矿粉中所含的硫酸盐可以加快水化反应,促进水化硅酸钙和水化铝酸钙的形成。免蒸压砖最优配比为:钼尾矿65%、矿粉30%、石灰5%,水玻璃掺量为矿粉质量的0.5%,水灰比0.43,按此制得的免蒸压砖28 d抗压强度为37.8 MPa,符合GB/T 21144—2007《混凝土实心砖》中MU35的要求。 展开更多
关键词 钼尾矿 矿粉 室温养护 免蒸压砖
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低钙固碳胶凝材料免蒸压加气混凝土的制备及性能研究 被引量:1
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作者 黎帅 周凤娇 +4 位作者 谭新宇 林永权 陶从喜 张宾 黄明俊 《新型建筑材料》 2023年第9期110-113,133,共5页
以低钙固碳胶凝材料、水泥、钢渣、石灰和石膏为主要原料,铝粉作为引气剂,采用碳化养护制备免蒸压加气混凝土(CLC),研究了原料配方和养护工艺对其干密度和抗压强度的影响。结果表明:调整原料配比,CLC制品的抗压强度最高达到5.2 MPa,符合... 以低钙固碳胶凝材料、水泥、钢渣、石灰和石膏为主要原料,铝粉作为引气剂,采用碳化养护制备免蒸压加气混凝土(CLC),研究了原料配方和养护工艺对其干密度和抗压强度的影响。结果表明:调整原料配比,CLC制品的抗压强度最高达到5.2 MPa,符合GB/T 11968—2020中A5.0、B07级要求。当低钙固碳胶凝材料掺量为40%,水泥20%,钢渣30%,水胶比为0.24,铝粉掺量为0.18%,CO_(2)养护浓度为100%,碳化时间为8 h制备的CLC制品性能最优,其干密度为571 kg/m^(3),抗压强度为4.0 MPa,符合A3.5、B06级要求。 展开更多
关键词 低钙固碳胶凝材料 免蒸压加气混凝土 碳化养护 抗压强度 干密度
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免蒸压硅锰渣加气混凝土力学性能研究
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作者 王昱博 赵琳 +2 位作者 辛明 李国涛 余俊 《吉林水利》 2023年第12期56-58,63,共4页
采用一定配比的含硅原料硅锰渣和硅灰,分别以不同的总质量比率(25%、50%、75%)替代粉煤灰,使用免蒸压工艺制作加气混凝土,并分析其干密度、质量含水率、立方体抗压强度、劈裂抗拉强度的动态变化规律。结果表明,掺入含硅原料时,随着原料... 采用一定配比的含硅原料硅锰渣和硅灰,分别以不同的总质量比率(25%、50%、75%)替代粉煤灰,使用免蒸压工艺制作加气混凝土,并分析其干密度、质量含水率、立方体抗压强度、劈裂抗拉强度的动态变化规律。结果表明,掺入含硅原料时,随着原料比率增大,干密度增长幅度较为明显,质量含水率与劈裂抗拉强度存在较小波动,抗压强度随着水胶比的变化而呈现规律性变化。其中,当硅锰渣与硅灰以25%取代粉煤灰时混凝土具有最高抗压强度,此发现对于环保节能及增强材料性能具有重要意义。 展开更多
关键词 硅锰渣 硅灰 免蒸压 加气混凝土
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外源硅和有机质对水稻土溶液中砷形态变化的影响 被引量:9
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作者 王钊 杨阳 +2 位作者 崔江慧 陈正 刘文菊 《水土保持学报》 CSCD 北大核心 2013年第2期183-188,共6页
采用水稻种植区的砷污染土壤,结合高效液相色谱(HPLC)-电感耦合等离子体质谱(ICP-MS)联用分析测试系统,探索了淹水模式下灭菌/不灭菌土壤中添加硅和有机质对砷污染土壤溶液中砷赋存形态的影响。结果表明:在土壤溶液中检测到的砷形态只... 采用水稻种植区的砷污染土壤,结合高效液相色谱(HPLC)-电感耦合等离子体质谱(ICP-MS)联用分析测试系统,探索了淹水模式下灭菌/不灭菌土壤中添加硅和有机质对砷污染土壤溶液中砷赋存形态的影响。结果表明:在土壤溶液中检测到的砷形态只有无机三价砷As(Ⅲ)、无机五价砷As(Ⅴ)和有机的二甲基砷DMA(Ⅴ),未检测到单甲基砷MMA(Ⅴ)的存在;As(Ⅲ)为砷的主要赋存形态,所占比例约为91%,As(Ⅴ)次之,约占8%,DMA(Ⅴ)含量相对最低,约为1%;在灭菌的情况下,随淹水时间的延长,添加外源硅增加了土壤溶液中As(Ⅲ)和As(Ⅴ)的浓度;而在自然淹水的土壤中添加有机质明显降低了土壤溶液中As(Ⅲ)、As(Ⅴ)、DMA(Ⅴ)和水溶性总砷的浓度(P<0.05)。结合水稻生长的实际环境条件和该研究结果进行分析显示,淹水20d后添加有机质的不灭菌自然土壤溶液中总砷浓度较低,为99.2ng/ml,因此,在砷污染的水稻种植区建议采用短周期干湿交替的水分管理模式和适量施用有机肥,尽量降低土壤溶液中总砷的浓度,从而控制土壤中砷的生物有效性。 展开更多
关键词 淹水模式 外源硅和有机质 土壤灭菌 不灭菌 砷形态
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氨基酸与钠离子非共价键相互作用的电喷雾质谱研究 被引量:3
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作者 吴胜明 杨松成 +6 位作者 王杰 王鸿丽 刘炳玉 李爱玲 何昆 魏开华 张学敏 《分析测试学报》 CAS CSCD 北大核心 2004年第z1期66-67,共2页
  实验研究中常常观察到钠离子与一些多肽或蛋白质有较强的非共价键结合能力,这种非共价键相互作用可能与生物的一些功能和活性有关.为了进一步了解这一结合作用,我们应用电喷雾质谱研究了常见的20种氨基酸与钠离子在溶液中的非共价...   实验研究中常常观察到钠离子与一些多肽或蛋白质有较强的非共价键结合能力,这种非共价键相互作用可能与生物的一些功能和活性有关.为了进一步了解这一结合作用,我们应用电喷雾质谱研究了常见的20种氨基酸与钠离子在溶液中的非共价键相互作用.实验研究中发现脯氨酸和苯丙胺酸与钠离子有较强的非共价键结合能力.…… 展开更多
关键词 Sodium ion Amino acids non - covalent interaction ESI - MS
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