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Correlation of Commonly Used Anthropometric Parameters with FPG,FPG-CV and HbA1C 预览
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作者 Ya-Nan Zhao Rui-Hua Wang +2 位作者 Li-Juan Zhang Qiang Xu Yan-Fen Li 《TMR食疗与健康管理》 2019年第1期2-7,共6页
Objective:To investigate the relationship between body mass index(BMI),waist circumference(WC),hip circumference(HC),waist-hip ratio(WHR),waist height ratio(WHtR),fasting blood glucose(FPG),fasting blood glucose varia... Objective:To investigate the relationship between body mass index(BMI),waist circumference(WC),hip circumference(HC),waist-hip ratio(WHR),waist height ratio(WHtR),fasting blood glucose(FPG),fasting blood glucose variation(FPG-CV)and glycosylated hemoglobin(HbA1C)to provide a reference for predicting the risk and development trend of diabetes mellitus.Methods:From October 2016 to December 2017,111 subjects from the Second Affiliated Hospital of Tianjin University of Traditional Chinese Medicine were selected to measure their height and weight.BMI,WHR and WHtR were calculated and the concentrations of FPG and HbA1C were detected.Statistical analysis was carried out with SPSS21.0 software,and the data were processed by multiple linear regression analysis.Results:The concentration dependence of WHtR,FPG,FPG-CV and HbA1C were more closely related.There was a significant difference between WHtR and FPG,FPG-CV and HbA1C by multiple linear regression analysis(t=8.531,6.910 and 6.905,respectively,P<0.01),and the correlation coefficient was 0.633,0.552 and 0.552 respectively(P<0.01).Conclusion:There is a significant correlation between WHtR and FPG,FPG-CV and HbA1C.Therefore,measuring the height and waist circumference for the predictive potential of diabetes needs to be emphasized and intensified. 展开更多
关键词 FASTING blood GLUCOSE FASTING GLUCOSE variation GLYCOSYLATED HEMOGLOBIN Human parameters Correlation
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Diabetes and Technology: Continuous Glucose Monitoring among Pregnant Women in Real Time 预览
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作者 Hossam Alakhrass Waleed Alenazi 《健康(英文)》 2019年第7期855-861,共7页
The objective of this paper is to assess if real-time intermittent Continuous Glucose Monitoring (CGM) helps to improve the control of glycemic and outcome of pregnancy in women with diabetes. A total of 123 women wit... The objective of this paper is to assess if real-time intermittent Continuous Glucose Monitoring (CGM) helps to improve the control of glycemic and outcome of pregnancy in women with diabetes. A total of 123 women with type 1 diabetes and 31 women with type 2 diabetes respectively were used at random in the Continuous Glucose Monitoring for a total of 6 days at different stages of pregnancy. Results revealed that intermittently using real-time Continuous Glucose Monitoring in pregnancy plus plasma glucose which is self-monitored does not really help to improve the control of glycemic or outcome of pregnant women with diabetes. 展开更多
关键词 DIABETES GLUCOSE Monitoring PREGNANCY Technology
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Glucose and Electrolytes Concentrations in Blood and Saliva Samples amongst Diabetics 预览
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作者 Mieebi Martin Wankasi Eni-yimini Solomon Agoro +1 位作者 Charles German Ikimi Edidiong Okon Tommy 《糖尿病(英文)》 2019年第2期39-49,共11页
Diabetes mellitus is a group of metabolic disorders of carbohydrate metabolism in which glucose is underutilized, producing hyperglycaemia. The management requires proper maintenance of glucose and electrolytes within... Diabetes mellitus is a group of metabolic disorders of carbohydrate metabolism in which glucose is underutilized, producing hyperglycaemia. The management requires proper maintenance of glucose and electrolytes within its optimum concentrations. The study was designed to evaluate the possibility of using saliva as an alternative non-invasive sample for the determination of electrolytes. A total of 100 samples were utilized consisting of equal number of control (non-diabetics) and diabetic groups. Fasting blood and saliva were collected employing standard methods. The biochemical parameters were analysed using WHO approved methods and procedures. Independent samples t-test and Pearson correlation were the statistical tools used for the data analysis obtained from SPSS package (version 20). The study revealed a significant increase (p < 0.05) in concentrations of blood and salivary glucose, potassium and calcium when controls were compared to diabetics. Moreover, there was a high level of semblances and patterns between plasma and salivary electrolytes, except for potassium. Therefore, electrolytes and glucose results gotten from the use of saliva could be used to equate to that of blood. Hence, instances of non-accessibility of blood, saliva could be of help. 展开更多
关键词 SALIVA Blood Electrolytes GLUCOSE NON-INVASIVE
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Can Wernicke’s Encephalopathy Be Precipitated by Administering Glucose before Thiamine in Severely Malnourished or Alcoholic Patients? 预览
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作者 Joshua Altman Matthew F. Ryan 《临床医学病理报告(英文)》 2019年第9期245-249,共5页
We discuss the safety and controversy regarding the administration of glucose before thiamine with regards to precipitation of Wernicke’s Encephalopathy in the severely malnourished and alcoholic patient population. ... We discuss the safety and controversy regarding the administration of glucose before thiamine with regards to precipitation of Wernicke’s Encephalopathy in the severely malnourished and alcoholic patient population. Herein we review clinical features, pathophysiology and the relevant literature to provide an evidenced-based recommendation that thiamine replacement should not delay glucose administration acutely in the malnourished patient population. 展开更多
关键词 Wernicke’s ENCEPHALOPATHY THIAMINE GLUCOSE
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Update on biomarkers of glycemic control 预览
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作者 Maja Krhac Marijana Vucic Lovrencic 《世界糖尿病杂志:英文版(电子版)》 2019年第1期1-15,共15页
Attaining and maintaining good glycemic control is a cornerstone of diabetes care.The monitoring of glycemic control is currently based on the self-monitoring of blood glucose(SMBG)and laboratory testing for hemoglobi... Attaining and maintaining good glycemic control is a cornerstone of diabetes care.The monitoring of glycemic control is currently based on the self-monitoring of blood glucose(SMBG)and laboratory testing for hemoglobin A1c(HbA1c),which is a surrogate biochemical marker of the average glycemia level over the previous 2-3 mo period.Although hyperglycemia is a key biochemical feature of diabetes,both the level of and exposure to high glucose,as well as glycemic variability,contribute to the pathogenesis of diabetic complications and follow different patterns in type 1 and type 2 diabetes.HbA1c provides a valuable,standardized and evidence-based parameter that is relevant for clinical decision making,but several biological and analytical confounders limit its accuracy in reflecting true glycemia.It has become apparent in recent years that other glycated proteins such as fructosamine,glycated albumin,and the nutritional monosaccharide 1,5-anhydroglucitol,as well as integrated measures from direct glucose testing by an SMBG/continuous glucose monitoring system,may provide valuable complementary data,particularly in circumstances when HbA1c results may be unreliable or are insufficient to assess the risk of adverse outcomes.Long-term associations of these alternative biomarkers of glycemia with the risk of complications need to be investigated in order to provide clinically relevant cut-off values and to validate their utility in diverse populations of diabetes patients. 展开更多
关键词 Diabetes mellitus HEMOGLOBIN A1C FRUCTOSAMINE Glycated ALBUMIN 1 5-ANHYDROGLUCITOL Plasma GLUCOSE GLUCOSE variability Diabetic complications
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基于频次的SAT问题学习子句混合评估算法 预览
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作者 吴贯锋 徐扬 +2 位作者 陈青山 何星星 常文静 《计算机工程与科学》 CSCD 北大核心 2019年第8期1374-1380,共7页
为了有效管理学习子句,避免学习子句规模呈几何级增长,减少冗余学习子句对系统内存占用,从而提高布尔可满足性问题SAT求解器的求解效率,需要对学习子句进行评估,然后删减学习子句。传统的评估方式是基于学习子句的长度,保留较短的子句... 为了有效管理学习子句,避免学习子句规模呈几何级增长,减少冗余学习子句对系统内存占用,从而提高布尔可满足性问题SAT求解器的求解效率,需要对学习子句进行评估,然后删减学习子句。传统的评估方式是基于学习子句的长度,保留较短的子句。当前主流的做法一个是变量衰减和VSIDS的子句评估方式,另外一个是基于文字块距离LBD的评估方式,也有将二者结合使用作为子句评估的依据。通过对学习子句参与冲突分析次数与问题求解的关系进行分析,将学习子句使用频率与LBD评估算法混合使用,既反映了学习子句在冲突分析中的作用,也充分利用了文字与决策层之间的信息。以Syrup求解器(GLUCOSE4.1并行版本)为基准,在评估算法与并行子句共享策略方面做改进测试,通过实验对比发现,混合评估算法比LBD评估算法有优势,求解问题个数明显增多。 展开更多
关键词 SAT问题 并行求解器 LBD GLUCOSE
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Metal Ions Impact on <i>Shewanella Oneidensis</i>MR-1 Adhesion to ITO Electrode and the Enhancement of Current Output 预览
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作者 Aisha Alshahrani Alanah Fitch John Al-Bazi 《美国分析化学(英文)》 2019年第9期428-443,共16页
The goal of this study is to enhance the efficiency of bacterial extracellular electron transfer (EET) in Shewanella oneidensis MR-1 by enhancing adhesion to the electrode surface. Our results clearly show a major dif... The goal of this study is to enhance the efficiency of bacterial extracellular electron transfer (EET) in Shewanella oneidensis MR-1 by enhancing adhesion to the electrode surface. Our results clearly show a major difference in attachment and behavior of S. oneidensis MR-1 for Ca2+, Pb2+, Cd2+, and Mg2+ compared to the control. The final microbial coverage, as measured by confocal microscopy and cathodic peak charge in cyclic voltammetry (Qpc), increases with increasing metal ion concentrations. We found the cells attached to the electrode increased more with the addition of metal ion concentrations in the following order of metals: Ca2+ > Pb2+ > Cd2+ > Mg2+ compared to the control. The effect of metal ions on metabolism of the bacteria was tested by the riboflavin production and glucose consumption. Metabolic activity mirrored the same order of the activity as the electrochemical results. 展开更多
关键词 SHEWANELLA oneidensis MR-1 Metal Ions Extracellular Electron Transfer Glucose RIBOFLAVIN ADHESION
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Mechanism Research of Reducing Obesity-Induced Insulin Resistance in the White Adipose Tissue by Knockdown of Neuropeptide Y Expression in the Dorsomedial Hypothalamus
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作者 ZHAI Qiuran QIN Qian +4 位作者 CHEN Peng CUI Zhihui WANG Jiao ZHANG Jianxiang WANG Shoujun 《武汉大学学报:自然科学英文版》 CAS CSCD 2019年第1期45-56,共12页
This study investigated the specific mechanism of knockdown of neuropeptide Y(NPY)in reducing obesity-induced insulin resistance in the white adipose tissue.Adeno-associated virus(AAV)-mediated RNAi was utilized to do... This study investigated the specific mechanism of knockdown of neuropeptide Y(NPY)in reducing obesity-induced insulin resistance in the white adipose tissue.Adeno-associated virus(AAV)-mediated RNAi was utilized to downregulate NPY expression in rats fed either regular chow or high fat diet.By investigating the differences in rat body weight and food intake,we assessed the effect of knockdown of NPY expression on insulin sensitivity andβ-cell proliferation.Glucose consumption and 2-[3 H]DG uptake in 3 T3-L1 adipocytes were assessed to determine the molecular mechanisms.The results showed that knockdown of NPY expression in the dorsomedial hypothalamus(DMH)reduced obesity-induced insulin resistance,increased glucose consumption,and decreased 2-[3 H]DG uptake in 3 T3-L1 adipocytes via the PI3 K/Akt/GSK-3βsignaling pathways and the NPY Y5 receptor. 展开更多
关键词 KNOCKDOWN of NEUROPEPTIDE Y(NPY) insulin resistance GLUCOSE consumption GLUCOSE INTAKE PI3K/Akt/GSK-3βsignaling pathways
碳源对O/A-F/F模式积累内源聚合物及反硝化的影响 被引量:1
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作者 崔有为 金常林 +1 位作者 王好韩 李晶 《环境科学》 EI CAS CSCD 北大核心 2019年第1期336-342,共7页
好氧/缺氧-盛宴/饥饿(O/A-F/F)选择模式能够在好氧段实现活性污泥积累内源聚合物的同时在缺氧段原位利用内源聚合物驱动反硝化.为了深入探究不同的碳源类型对O/A-F/F模式下内源聚合物积累和内源反硝化的影响,实验以乙酸和葡萄糖为主要... 好氧/缺氧-盛宴/饥饿(O/A-F/F)选择模式能够在好氧段实现活性污泥积累内源聚合物的同时在缺氧段原位利用内源聚合物驱动反硝化.为了深入探究不同的碳源类型对O/A-F/F模式下内源聚合物积累和内源反硝化的影响,实验以乙酸和葡萄糖为主要碳源探究内源聚合物积累和内源反硝化特性以及富集的活性污泥菌群的结构和功能.结果表明,在O/A-F/F选择模式下,当进水化学需氧量(COD)为500 mg·L^-1左右时,以乙酸为主要碳源系统(Ac-SBR)和以葡萄糖为主要碳源的系统(Gc-SBR)均能实现40 mg·L^-1的硝酸盐氮的内源去除,且各系统均实现了部分短程反硝化.但Ac-SBR实现了更高的亚硝酸盐的积累.乙酸有利于内源聚羟基脂肪酸酯(PHA)积累并驱动内源反硝化过程,PHA产率为0.52,平均反硝化速率(DNR)为9.65 mg·(L·h)^-1.Gc-SBR系统能够实现PHA和糖原(Gly)的同时积累,但Gly产率高于PHA产率,分别为0.36和0.17,DNR为4.35 mg·(L·h)^-1.Gly是实现内源反硝化过程的主要驱动力,反硝化脱氮贡献率占总量的77%.16S rRNA高通量测序表明Proteobacteria门中的β-Proteobacteria在Ac-SBR中为优势菌纲,菌群丰度为40.56%,而在Gc-SBR中菌群丰度为18.05%.α-Proteobacteria可能在Gc-SBR中贡献了微生物的糖原积累.β-Proteobacteria、Unclassified Bacteroidetes和Lgnavibacteria在Ac-SBR中贡献了内源PHA积累. 展开更多
关键词 好氧/缺氧-盛宴/饥饿模式(O/A-F/F) 乙酸 葡萄糖 内源聚合物积累 内源反硝化
Aspirin inhibits the proliferation of hepatoma cells through controlling GLUT 1-mediated glucose metabolism
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作者 Yun-xia Liu Jin-yan Feng +8 位作者 Ming-ming Sun Bo-wen Liu Guang Yang Ya-nan Bu Man Zhao Tian-jiao Wang Wei-ying Zhang Hong-feng Yuan Xiao-dong Zhang 《中国药理学报:英文版》 SCIE CAS CSCD 2019年第1期122-132,共11页
Aspirin can efficiently inhibit liver cancer growth,but the mechanism is poorly,understood.In this study,we-report that aspirin modulates glucose uptake through downregulating glucose transporter 1 (GLUT1),leading to ... Aspirin can efficiently inhibit liver cancer growth,but the mechanism is poorly,understood.In this study,we-report that aspirin modulates glucose uptake through downregulating glucose transporter 1 (GLUT1),leading to the inhibition of hepatoma cell proliferation.Our data showed that aspirin significantly decreased the levels of reactive oxygen species (ROS)and glucose consumption in hepatoma cells.Interestingly,we identified that GLUT1 and HIF1α could be decreased by aspirin.Mechanically,we demonstrated that the -1008/-780 region was the regulatory element of transcriptional factor NF-κB in GLUT1 promoter by luciferase report gene assays.PDTC,an inhibitor of NF-KB,could suppress the expression of GLUT1 in HepG2 and H7402 cells,: followed by affecting the levels of ROS and glucose consumption.CoCl2-activated HIF1α expression could slightly rescue the GLUT1 expression inhibited by aspirin or PDTC,suggesting that aspirin depressed GLUT1 through targeting NF-κB or NF-κB/HIFla signaling.Moreover,we found that GLUT1 was highly expressed in clinical HCC tissues relating to their paired adjacent normal tissues.Importantly,we observed that high level of GLUT1 was significantly correlated with the poor relapse-free survival of HCC patients by analysis of public data.Functionally,overexpression of GLUT1 blocked the PDTC-induced or aspirin-induced inhibition of glucose metabolism in HepG2 cells.Conversely,aspirin failed to work when GLUT1 was stably knocked down in the cells. Administration of aspirin could depress the growth of hepatoma cells through controlling GLUT1 in vitro and in vivo.Thus,our finding provides new insights into the mechanism by which aspirin depresses liver cancer. 展开更多
关键词 ASPIRIN GLUCOSE UPTAKE GLUT1 NF-κB liver cancer
负压型微流控葡萄糖生物传感在线检测系统的研制 预览
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作者 高学金 吕昕雨 金辰 《仪表技术与传感器》 CSCD 北大核心 2019年第9期66-68,共3页
葡萄糖是发酵过程中菌体生长和产物合成的主要碳源。为了稳定产物产量与质量,必须控制葡萄糖在发酵液中的浓度。由于第一代酶注射式葡萄糖在线分析仪响应速度慢,流路结构复杂且易受噪声干扰,不利于在线检测。因此,文中设计了一种结合了... 葡萄糖是发酵过程中菌体生长和产物合成的主要碳源。为了稳定产物产量与质量,必须控制葡萄糖在发酵液中的浓度。由于第一代酶注射式葡萄糖在线分析仪响应速度慢,流路结构复杂且易受噪声干扰,不利于在线检测。因此,文中设计了一种结合了Y型和S型混合流道的微流控芯片,作为葡萄糖生物传感器的核心部件。应用负压抽取液体的方式抽取微流控芯片中的反应液体,来保证分析系统流路中的液体流转。经实验对比和测试,蠕动泵在5 mL/h的抽取速度下,液体混合和反应效果较好,所研制的葡萄糖生物分析系统基本满足了发酵过程葡萄糖在线测量的要求。 展开更多
关键词 负压 微流控芯片 葡萄糖 发酵过程 在线测量
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Novel Cancer Treatment Using Targeted Delivery of Short-Lived Radiologically Activated Nanoparticles 预览
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作者 P.L.Andrade J.B.Leao 《健康科学:英文版》 2019年第1期43-47,共5页
The goal of our preliminary study is to show that a minimal of overall body toxicity while maximizing the cancer tumor treatment may be achieved in a novel approach where minute amounts of coated nanoparticles may be ... The goal of our preliminary study is to show that a minimal of overall body toxicity while maximizing the cancer tumor treatment may be achieved in a novel approach where minute amounts of coated nanoparticles may be radiologically activated prior to treatment and“coerce”tumor cells into readily absorb these nanoparticles.This targeted intracytoplasmic delivery of short-lived radiologically activated nanoparticles could provide less“whole-body”radiation dose while delivering a short lived potent tumor localized dose,along with their low toxicity may prove to be another tool in the treatment of diverse cancers. 展开更多
关键词 NANOPARTICLES NEUTRON activation IRRADIATION cancer metabolism WARBURG effect GLUTAMINE GLUCOSE
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不同盐度条件下葡萄糖对余氯等水质的影响 预览
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作者 秦海鹏 许威威 +6 位作者 王博 廖栩峥 胡世康 刘雪婷 郑义华 苏玉芹 孙成波 《安徽农业科学》 CAS 2019年第7期94-97,共4页
[目的]研究葡萄糖在不同盐度条件下对余氯的去除效果,水体中微生物的生长衰亡对水体中三氮的影响,以及余氯对水体pH的影响。[方法]在4个盐度梯度(0、10、20、30)条件下设置相同浓度的葡萄糖,研究葡萄糖对水中总余氯的去除效果,同时计算... [目的]研究葡萄糖在不同盐度条件下对余氯的去除效果,水体中微生物的生长衰亡对水体中三氮的影响,以及余氯对水体pH的影响。[方法]在4个盐度梯度(0、10、20、30)条件下设置相同浓度的葡萄糖,研究葡萄糖对水中总余氯的去除效果,同时计算各个盐度7d内的水体水质指标。[结果]在30h时盐度为30的水体中总余氯浓度最先降至0,与其他3组显著差异(P<0.05)。盐度为0时,弧菌无法生长。4个不同盐度梯度下的总菌数目24h后均不同程度的增长,此后细菌数量开始减少衰亡,4组之间差异显著(P<0.05)。在7个时间点内盐度为0的水体pH比其他3个盐度梯度的pH均高,盐度0与另外3组差异显著(P<0.05)。在7个时间内4个盐度梯度的氨氮先缓慢升高然后上升速度逐渐变快,最后快速下降。在7个时间内硝酸盐变化趋向于平缓,波动不大,4组之间差异不显著(P>0.05)。4个盐度梯度的亚硝酸盐含量在0~72h出现微小波动,但72h后开始略有升高且在升高后保持稳定。[结论]在消毒水体中加入葡萄糖作为中和余氯的碳源,不同盐度对葡萄糖中和余氯的效率有影响,盐度越高,中和效率越高,且水体中的三氮随着水体中细菌数量的增长衰亡呈现规律变化。 展开更多
关键词 盐度 葡萄糖 去除余氯 三氮 菌群
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脱脂牛乳体系中乳蛋白-葡萄糖美拉德反应程度及产物功能性质研究 预览
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作者 牟全生 杨敏 +5 位作者 王裕成 包鹏杰 雷敬敬 陈浩 王海霞 杨继涛 《食品工业科技》 CAS 北大核心 2019年第12期1-6,共6页
以脱脂牛乳为研究对象,以葡萄糖为还原糖,对乳蛋白进行美拉德反应修饰,研究葡萄糖添加量为0~9 g/100 mL脱脂乳时反应体系的糖基化程度、pH、中间产物含量、褐变程度、粒径,以及产物乳化性、发泡性和吸油性。结果显示,脱脂乳体系糖基化... 以脱脂牛乳为研究对象,以葡萄糖为还原糖,对乳蛋白进行美拉德反应修饰,研究葡萄糖添加量为0~9 g/100 mL脱脂乳时反应体系的糖基化程度、pH、中间产物含量、褐变程度、粒径,以及产物乳化性、发泡性和吸油性。结果显示,脱脂乳体系糖基化程度在葡萄糖添加量为3 g/100 mL时达到最大值,之后迅速降低;中间产物和褐变程度均在该添加量下达到最低值,之后迅速上升。反应体系pH并未随葡萄糖添加量的增加而显著变化。糖基化反应后,酪蛋白胶束粒径增加。糖基化修饰改善了脱脂乳体系的乳化性,当葡萄糖添加量为3 g/100 mL时,乳化活性和乳化稳定性均达到最大值。糖基化修饰后,脱脂乳体系的发泡性并未显著提高,但该体系10和30 min泡沫稳定显著增加(p<0.05)。糖基化修饰后乳蛋白的吸油性降低。研究结论可为脱脂乳体系中乳蛋白美拉德反应产物的应用提供基础数据。 展开更多
关键词 脱脂乳 糖基化 美拉德反应 葡萄糖
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工艺处理对金花茶花营养成分的影响
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作者 罗昭润 刘彰铭 +2 位作者 田雪琴 赵鸿杰 玄祖迎 《林业科技通讯》 2019年第2期49-51,共3页
通过测定活性成分、矿质元素、微量元素、氨基酸等营养成分含量,研究了制作工艺对金花茶花营养成分的影响。结果表明:制作工艺处理金花茶花活性成分茶多酚、茶多糖、黄酮和维生素E、维生素C含量分别升高249.28%、1 129.29%、390.16%和18... 通过测定活性成分、矿质元素、微量元素、氨基酸等营养成分含量,研究了制作工艺对金花茶花营养成分的影响。结果表明:制作工艺处理金花茶花活性成分茶多酚、茶多糖、黄酮和维生素E、维生素C含量分别升高249.28%、1 129.29%、390.16%和181.09%、47.02%,茶皂苷、咖啡碱含量分别下降4 530.36%和101.85%;矿质元素中K、Na、Ca、Mg、P含量分别升高719.06%、112.04%、592.57%、796.86%和872.27%;微量元素中Fe、Mn、Zn、Cu、Se含量分别升高248.74%、227.55%、350.30%、774.25%和477.78%;氨基酸总量增加972.72%。该工艺提高金花茶营养成分,可以用于制作金花茶花茶。 展开更多
关键词 金花茶 CAMELLIA nitidissima 葡萄糖 真空干燥 制作工艺 营养成分
SnO2-Pt/γ-Al2O3催化葡萄糖制备乳酸甲酯的研究 预览
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作者 王珍 黄元波 +2 位作者 郑云武 王继大 郑志锋 《林产化学与工业》 EI CAS CSCD 北大核心 2019年第3期49-56,共8页
以γ-Al2O3为载体,采用浸渍法制备了SnO2-Pt/γ-Al2O3催化剂,探讨工艺参数(反应温度、反应时间、催化剂用量)对葡萄糖催化转化制备乳酸甲酯的影响,并对催化剂的重复使用性能以及放大实验进行探索。同时采用扫描电子显微镜(SEM)、X光射... 以γ-Al2O3为载体,采用浸渍法制备了SnO2-Pt/γ-Al2O3催化剂,探讨工艺参数(反应温度、反应时间、催化剂用量)对葡萄糖催化转化制备乳酸甲酯的影响,并对催化剂的重复使用性能以及放大实验进行探索。同时采用扫描电子显微镜(SEM)、X光射线电子能谱(XPS)、X射线衍射(XRD)、氮气吸附-脱附、NH3程序升温脱附(NH3-TPD)等对SnO2-Pt/γ-Al2O3催化剂进行了表征。结果表明:金属Pt和SnO2均匀地分散到γ-Al2O3载体上,催化剂体系同时具有B酸和L酸的分布,比表面积为117.08m^2/g,孔容为0.23cm^3/g,平均孔径为6.54nm,催化活性明显。当葡萄糖为1g、催化剂用量(以葡萄糖质量计)为10%、葡萄糖与甲醇料液比为1∶10(g∶mL)、反应温度220℃、反应10h的条件下,SnO2-Pt/γ-Al2O3表现出较高催化活性,葡萄糖转化率为92.63%,乳酸甲酯选择性高达20.08%,且催化剂表现出良好的重复使用性能和放大稳定性,重复使用3次时,葡萄糖转化率仍达88.43%,乳酸甲酯选择性达19.27%;物料投加量放大10倍时,葡萄糖转化率仍达86.27%,乳酸甲酯选择性达18.71%。 展开更多
关键词 乳酸甲酯 SnO2-Pt/γ-Al2O3 载体 葡萄糖 甲醇
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NiO@Ni/TNTs纳米复合材料的制备及其对葡萄糖电催化性能的研究 预览
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作者 关高明 徐兆柳 +2 位作者 游秋娥 邱燕璇 蒋辽川 《广州化工》 CAS 2019年第20期38-41,共4页
采用阳极氧化法在Ti片基底制备TiO2纳米管阵列,再以脉冲电化学沉积法对纳米管阵列进行功能化修饰NiO颗粒,得到NiO@Ni/TNTs纳米复合材料.利用场发射扫描电子显微镜和X射线衍射仪研究该复合材料的形貌和晶体结构.NiO@Ni/TNTs纳米复合材料... 采用阳极氧化法在Ti片基底制备TiO2纳米管阵列,再以脉冲电化学沉积法对纳米管阵列进行功能化修饰NiO颗粒,得到NiO@Ni/TNTs纳米复合材料.利用场发射扫描电子显微镜和X射线衍射仪研究该复合材料的形貌和晶体结构.NiO@Ni/TNTs纳米复合材料对葡萄糖进行测试,循环伏安结果表明,氧化峰电位在+0.58 V左右,证明其对葡萄糖具有较好的电催化性能.同时,抗干扰性、稳定性和重现性实验也表明该材料对葡萄糖的测试具有很好的选择性、稳定性和重现性,是一种较为理想的无酶型葡萄糖电化学传感器. 展开更多
关键词 TIO2纳米管阵列 NiO@Ni/TNTs纳米复合材料 电化学传感器 葡萄糖
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基于Ni12P5纳米粒子的电化学传感器用于灵敏测定葡萄糖(英文) 预览
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作者 徐雯 周讯 +2 位作者 徐金明 徐涵 陶菲菲 《无机化学学报》 SCIE CAS CSCD 北大核心 2019年第4期729-736,共8页
通过改进的热溶剂胶体合成法制备了单分散的Ni12P5纳米粒子,并利用X射线衍射、透射电子显微镜、X射线光电子能谱、X射线能谱对Ni12P5纳米粒子的晶体结构、化学组成和形貌等进行了表征。基于单分散Ni12P5纳米粒子研制出的非酶葡萄糖传感... 通过改进的热溶剂胶体合成法制备了单分散的Ni12P5纳米粒子,并利用X射线衍射、透射电子显微镜、X射线光电子能谱、X射线能谱对Ni12P5纳米粒子的晶体结构、化学组成和形貌等进行了表征。基于单分散Ni12P5纳米粒子研制出的非酶葡萄糖传感器具有出色的性能,其快速响应时间小于3 s,检测范围广(0.002~4.2 mmol·L-1),灵敏度高达1 572 mA·L·mol-1·cm-2,检测限低至0.8μmol·L-1。此外,该传感器在用于人体血液中葡萄糖的实际检测中取得了满意的效果。 展开更多
关键词 纳米粒子 生物传感器 葡萄糖 电分析
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涤/棉织物植物靛蓝染料生态染色工艺 预览
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作者 王华清 《印染助剂》 CAS 北大核心 2019年第7期44-47,共4页
以葡萄糖代替保险粉作为植物靛蓝染料的还原剂,对涤/棉织物进行染色。为解决涤/棉织物靛蓝染料染色同色性较差的问题,对涤/棉织物采用两浴法染色。探讨了葡萄糖用量、氢氧化钠用量、还原温度、还原时间、染色温度、染色时间等对涤/棉织... 以葡萄糖代替保险粉作为植物靛蓝染料的还原剂,对涤/棉织物进行染色。为解决涤/棉织物靛蓝染料染色同色性较差的问题,对涤/棉织物采用两浴法染色。探讨了葡萄糖用量、氢氧化钠用量、还原温度、还原时间、染色温度、染色时间等对涤/棉织物K/S值的影响,并测试了染色织物的色牢度。结果显示,植物靛蓝染涤的最佳工艺为:靛蓝5 g/L,葡萄糖10 g/L,氢氧化钠0.5 g/L,60℃还原30 min,pH=5,120℃保温染色30 min;染棉的最佳工艺为:靛蓝5 g/L,葡萄糖40 g/L,氢氧化钠8 g/L,50℃还原30 min,35℃保温染色两次共60 min。两浴法染涤/棉织物可使涤纶和棉纤维有较好的同色性、染色深度和色牢度。 展开更多
关键词 涤/棉织物 植物靛蓝染料 葡萄糖 同色性 染色
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分级多孔活性炭的KOH再活化法制备及其电化学性能 预览
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作者 孙靖 艾金贵 +2 位作者 张津凤 杨树华 曹丙强 《中国粉体技术》 CAS CSCD 2019年第6期56-61,共6页
首先利用水热法以葡萄糖为碳源合成炭微球,然后采用KOH再活化法将炭微球制备成分级多孔活性炭,最后测试并表征其作为超级电容器电极材料的电化学性能。结果表明:KOH再活化法具有扩孔和再造孔的双重作用,可获得具有较高的比表面积、合适... 首先利用水热法以葡萄糖为碳源合成炭微球,然后采用KOH再活化法将炭微球制备成分级多孔活性炭,最后测试并表征其作为超级电容器电极材料的电化学性能。结果表明:KOH再活化法具有扩孔和再造孔的双重作用,可获得具有较高的比表面积、合适的分级多孔结构和良好的石墨化程度的分级多孔活性炭材料;在Na2SO4中性电解液中,在电流密度为1 A/g时,分级多孔活性炭材料的比电容可达209 F/g,表现出优异的电化学性能。 展开更多
关键词 葡萄糖 炭微球 再活化 分级多孔活性炭 超级电容器
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