火焰原子吸收法测定葡萄糖饮料中的锌含量   总被引：1，自引：0，他引：1  

贾淑梅  李玉霞 《雁北师范学院学报》2002,18(5):47-48

本文用混酸HNO3 HClO3(3 1)消化葡萄糖饮料,利用火焰原子吸收法在λ=213.9m处测定锌的含量,工作曲线R=0.9992,精密度为0.58%,加标回收率为105.3%.结果令人满意.  相似文献   

The effect of pre-exercise carbohydrate feedings on the intensity that elicits maximal fat oxidation     

Juul Achten & Asker E Jeukendrup 《Journal of sports sciences》2013,31(12):1017-1025

The aim of the present study was to examine the effect of ingesting 75?g of glucose 45?min before the start of a graded exercise test to exhaustion on the determination of the intensity that elicits maximal fat oxidation (Fat_max). Eleven moderately trained individuals ( V?O_2max: 58.9±1.0?ml?·?kg^?1?·?min^?1; mean±s_x¯ ), who had fasted overnight, performed two graded exercise tests to exhaustion, one 45?min after ingesting a placebo drink and one 45?min after ingesting 75?g of carbohydrate in the form of glucose. The tests started at 95?W and the workload was increased by 35?W every 3?min. Gas exchange measures and heart rate were recorded throughout exercise. Fat oxidation rates were calculated using stoichiometric equations. Blood samples were collected at rest and at the end of each stage of the test. Maximal fat oxidation rates decreased from 0.46±0.06 to 0.33±0.06?g?·?min^?1 when carbohydrate was ingested before the start of exercise (P?<0.01). There was also a decrease in the intensity which elicited maximal fat oxidation (60.1±1.9% vs 52.0±3.4% V?O_2max) after carbohydrate ingestion (P?<0.05). Maximal power output was higher in the carbohydrate than in the placebo trial (346±12 vs 332±12?W) (P?<0.05). In conclusion, the ingestion of 75?g of carbohydrate 45?min before the onset of exercise decreased Fat_max by 14%, while the maximal rate of fat oxidation decreased by 28%.  相似文献   

有氧运动对大鼠血糖、血脂和血液凝固功能的影响   总被引：3，自引：0，他引：3  

章罗庚 《北京体育大学学报》2009,(7)

目的:研究有氧运动(游泳)对大鼠血糖、血脂和血液凝固功能的影响。方法:30只SD大鼠进行不同强度的游泳训练后,测定其血糖、血脂、血浆组织因子(TF)活性、组织因子途径抑制物(TFPI)抗原、组织型纤溶酶原激活物(t-PA)和纤溶酶原激活剂抑制物-1(PAI-1)的活性。结果:1)与对照组相比,运动对大鼠血糖有降低趋势,但差异无统计学意义(p>0.05);2)小强度运动使大鼠血清LDL明显降低(p<0.05),大强度运动具有升高血清LDL的趋势;3)小运动组大鼠血清HDL浓度呈逐渐升高趋势,而大强度组的大鼠血清HDL明显降低(p<0.05);4)小强度游泳运动后,血浆t-PA活性及t-PA/PAI-1比值明显升高(p<0.01),PAI-1活性却明显降低(p<0.05);大强度游泳运动组t-PA活性没有明显改变,PAI-1活性有所升高;5)与对照组相比,运动训练使TFPI水平升高,其中小强度组TFPI含量(p<0.05)和TFPI/TF比值显著性升高(p<0.01),大强度组的TF含量有所升高,而TFPI/TF比值变化不明显(p>0.05)。结论:小强度的运动训练可以改善机体的凝血和纤溶功能,而大强度的训练不利...  相似文献   

Influence of pranayamas and yoga-asanas on serum insulin,blood glucose and lipid profile in type 2 diabetes     

Savita Singh  Tenzin Kyizom  K. P. Singh  O. P. Tandon  S. V. Madhu 《Indian journal of clinical biochemistry : IJCB》2008,23(4):365-368

A distinguishable feature of type 2 diabetes besides hyperglycemia and deranged lipid profile is an impaired insulin secretion, peripheral insulin resistance and obesity which has become a major health concern worldwide. India with an estimated 31million diabetics in 2000 and 79mllions by the yr 2030 has the highest number of type 2 diabetics in the world. In this study, we aimed to see if yoga-asanas and pranayamas have any influence in modifying certain biochemical parameters. Sixty patients of uncomplicated type 2 diabetes (age 35–60 yrs of 1–10 yrs duration) were divided into two groups: Group 1 (n=30): performed yoga along with the conventional hypoglycemic medicines and group 2 (n=30): patients who only received conventional medicines. Duration of the study was 45 days. Basal recordings of blood glucose (fasting and post-prandial), lipid profile and serum insulin were taken at the time of recruitment and the second reading after forty five days. Results showed a significant improvement in all the biochemical parameters in group 1 while group 2 showed significant improvement in only few parameters, thus suggesting a beneficial effect of yoga regimen on these parameters in diabetic patients.  相似文献   

葡萄糖和果糖对小鼠运动能力影响的对比研究   总被引：8，自引：0，他引：8  

王竹影  严政  邵慧秋 《体育与科学》2000,21(5):32-35

90只昆明种小鼠随机分成安静对照组 (A组 ) ,服葡萄糖运动组 (B1组 ) ,服果糖运动组 (B2组 ) ,服葡萄糖 -果糖运动组 (B3组 )和空白运动组 (B4组 ) ,服药组短期服用糖溶液后 ,进行游泳耐力实验和 4 5分钟定量负荷的游泳运动。结果表明B3组游泳耐力显著延长 ,其次为B2组 ,B1组与B4组之间无明显差异 ;定量负荷运动后 ,B3组血浆丙二醛增幅显著下降 ,红细胞膜Na K ATPase活性明显升高 ,B1、B2和B3组血乳酸浓度增幅显著下降 ,各组间血浆SOD变化不明显  相似文献   

负重力竭性游泳对大鼠血清胰岛素血糖浓度的影响及胰岛B细胞图像分析   总被引：7，自引：0，他引：7  

郑陆  黄岩 《北京体育大学学报》1995,(4)

采用放免分析法及氧化酶法对大鼠负重游泳至力竭状态时血清胰岛素（Ins）及血糖（BG）水平进行测定，同时利用免疫组化PAP法分别显示其胰岛Ins-和IAPP－（胰岛淀粉样多肽）免疫反应细胞，通过图像分析方法对实验组及对照组大鼠胰岛免疫反应细胞的面积进行测量。结果显示，力竭状态下大鼠血清Ins↓BG↑（P＜0.01）。这种变化是由于胰岛B细胞释放Ins受到抑制所致。同时发现，以往认为从B细胞相伴释放的Ins与IAPP的分泌并非完全一致。认为其差异乃是由于B细胞内存在着IAPP／Ins不同比例的分泌颗粒随机体的能量代谢需要而释放的结果。  相似文献   

高初糖谷氨酸发酵的研究     

邓毛程王瑶  阳元娥 《广东轻工职业技术学院学报》2004,3(2):12-14

在高初糖谷氨酸发酵中，高玉米浆用量、高生物素用量可以明显降低高初糖对菌体细胞的抑制作用；且在接种量为10％，玉米浆用量为0．55％，生物素用量为10μg／L，初糖为190g／L的谷氨酸发酵中，流加500g／L的浓糖，30h的产酸率达到145.8g／L，糖酸转化率达到60．32％。  相似文献   

Effects of vanadate on the activities of mice glucokinase and hexokinase     

徐明智  张爱珍  李向荣  许唯  沈凌炜 《Journal of Zhejiang University. Science. B》2004,(10)

This study aimed at acquiring knowledge on the hypoglycemic mechanisms of sodium metavanadate (SMV) showed that the liver glucokinase and muscle hexokinase activities increased rapidly after oral SMV was given, and that the blood glucose level was correlated closely with the activities of the two enzymes but not with the insulin level; which indicated that SMV could improve the altered glucose phosphorylation in diabetic mice independently of stimulating insulin secretion. This was probably one of the mechanisms of hypoglycemic effects of SMV.  相似文献   

红外多波长无创人体血糖检测技术研究     

张大龙  刘芳霞 《咸阳师范学院学报》2004,19(2):23-25

红外多波长血糖检测是利用人体血管红外线的热梯度光谱信息．通过数学模型求出血糖浓度的无创伤的检测方法，特别适用于长期、频繁的血糖检测。研究了红外多波长无创人体血糖检测关键技术，取得了实验室成果。  相似文献   

Use of glycated hemoglobin (HbA<Subscript>1C</Subscript>) and impaired glucose tolerance in the screening of undiagnosed diabetes in the Malaysian population     

Rajes Qvist  Ikram Shah Ismail  Karuthan Chinna  Sekaran Muniandy 《Indian journal of clinical biochemistry : IJCB》2008,23(3):246-249

Although HbA_1C is widely accepted as a useful index of mean blood glucose in type 2 diabetic patients its usefulness as screening test for diabetes has been controversial. The present study was undertaken to determine whether the level of HbA_1C predicted diabetes in a prediabetic group of subjects. Plasma lipids, oral glucose tolerance, HbA_1C was determined in 90 normal control subjects, 57 offspring of one type 2 diabetes mellitus parent and 11 diagnosed type 2 diabetes mellitus individuals. The mean age of participants was 44.5 yrs (not significantly different amongst the three groups) and the mean body mass index was 26.8 (not significantly different amongst the three groups). Two hours after a 75 g glucose challenge, the offspring had a significantly higher plasma glucose level (mean = 7.1 mmol/L, p value = 0.002) than the normals. Similarly the HbA_1C values were higher in the offspring than in the normals (mean = 5.78%, p value = 0.016). Besides the significantly higher values for oral glucose tolerance test and HbA_1C, the diabetics also were significantly higher for triglycerides (mean = 2.25mmol/L), total cholesterol (mean = 6.24mmol/L) and systolic blood pressure (mean = 138.45mm Hg) than the offspring (P value = 0.031, 0.006, 0.010) and the normals (P value = 0.026, 0.018, 0.002) respectively. The mean values of diastolic blood pressure, LDL cholesterol and HDL cholesterol were not significantly different amongst the three groups.  相似文献