目的:探讨津力达颗粒辅助治疗对2型糖尿病(T2DM)患者糖代谢指标及氧化应激反应的影响。方法:选取我院2022年1月—2023年4月收治的96例T2DM患者,按随机数字表法分为对照组与观察组,各48例。对照组予常规治疗,观察组基于常规治疗予津力达...目的:探讨津力达颗粒辅助治疗对2型糖尿病(T2DM)患者糖代谢指标及氧化应激反应的影响。方法:选取我院2022年1月—2023年4月收治的96例T2DM患者,按随机数字表法分为对照组与观察组,各48例。对照组予常规治疗,观察组基于常规治疗予津力达颗粒辅助治疗。对比2组糖代谢指标[空腹血糖水平(FBG)、餐后2 h血糖(2 h PBG)、糖化血红蛋白(Hb A1c)],胰岛细胞功能[胰岛β细胞功能(HOMA-β)、胰岛素抵抗指数(HOMA-IR)],氧化应激反应指标[丙二醛(MDA)、超氧化物歧化酶(SOD)]及不良反应。结果:治疗8周,观察组FBG、2 h PBG、Hb A1c、HOMA-IR、MDA水平较对照组低,HOMA-β、SOD水平较对照组高,差异具有统计学意义(P<0.05);观察组与对照组不良反应对比,差异无统计学意义(P>0.05)。结论:T2DM患者采用津力达颗粒辅助治疗可改善糖代谢与胰岛细胞功能,减轻氧化应激反应,且安全性好。展开更多
Biochar addition can improve the physical and hydraulic characteristics of sandy soil.This study investigated the effects of biochar on water holding capacity and water movement in sandy soil under drip irrigation.By ...Biochar addition can improve the physical and hydraulic characteristics of sandy soil.This study investigated the effects of biochar on water holding capacity and water movement in sandy soil under drip irrigation.By indoor simulation experiments,the effects of biochar application at five levels(0%,1%,2%,4%and 6%)on the soil water retention curve,infiltration characteristics of drip irrigation and water distribution were tested and analyzed.The results showed that biochar addition rate was positively correlated with water holding capacity of sandy soil and soil available water.Within the same infiltration time,with an increasing amount of added biochar,the diffusion distance of the horizontal wetting front(HWF)tended to decrease,while the infiltration distance of vertical wetting front(VWF)initially declined and then rose.The features of wetted bodies changed from"broad-shallow"to"narrow-deep"type.The relationship between the transport distances of HWF and VWF and the infiltration time was described by a power function.At the same distance from the point source,the larger the amount of added biochar,the higher the soil water content.Biochar had a great influence on the water content of the layer with biochar(0–200 mm)and had some effects at 200–250 mm without biochar;but it had less influence on the soil water content deeper than 250 mm.For the application rate of biochar of 4%,most water was retained within 0–250 mm soil layer.However,when biochar application amount was high(6%),it would be helpful for water infiltration.During the improvement of sandy soil,biochar application rate of 4%in the plow layer had the best effect.展开更多
Stable isotopic compositions (δ18O and 6D) have been utilized as a useful indicator for evaluating the current and historical climatic and environmental changes. Therefore, it is vital to understand the relationshi...Stable isotopic compositions (δ18O and 6D) have been utilized as a useful indicator for evaluating the current and historical climatic and environmental changes. Therefore, it is vital to understand the relationship be- tween the stable isotopic contents in lake water and the variations of lake level, particularly in Lake Qinghai, China. In this study, we analyzed the variations of isotope compositions (δ18O, 6D and d-excess) in lake water and pre- cipitation by using the samples that were collected from Lake Qinghai region during the period from 2009 to 2012. The results showed that the average isotopic contents of δ18O and 6D in lake water were higher than those in pre- cipitation, which were contrary to the variations of d-excess. The linear regression correlations between δ18O and 6D in lake water and precipitation showed that the local evaporative line (LEL) in lake water (δD=5.88δ18O-2.41) deviated significantly from the local meteoric water line (LMWL)in precipitation (δD=8.26δ18O+16.91), indicating that evaporative enrichment had a significant impact on isotopic contents in lake water. Moreover, we also quanti- fied the Eli ratio (evaporation-to-input ratio) in Lake Qinghai based on the lake water isotopic enrichment model derived from the Rayleigh equation. The changes of E/I ratios (ranging from 0.29 to 0.36 between 2009 and 2012) clearly revealed the shifts of lake levels in Lake Qinghai in recent years. The average E/I ratio of 0.40 reflected that water budget in Lake Qinghai was positive, and consistent with the rising lake levels and the increasing lake areas in many lakes of the Tibetan Plateau. These findings provide some evidences for studying the hydrological balance or water budget by using δ18O values of lake sedimentary materials and contribute to the reconstruction of paleo- lake water level and paleoclimate from an isotopic enrichment model in Lake Qinghai.展开更多
文摘目的:探讨津力达颗粒辅助治疗对2型糖尿病(T2DM)患者糖代谢指标及氧化应激反应的影响。方法:选取我院2022年1月—2023年4月收治的96例T2DM患者,按随机数字表法分为对照组与观察组,各48例。对照组予常规治疗,观察组基于常规治疗予津力达颗粒辅助治疗。对比2组糖代谢指标[空腹血糖水平(FBG)、餐后2 h血糖(2 h PBG)、糖化血红蛋白(Hb A1c)],胰岛细胞功能[胰岛β细胞功能(HOMA-β)、胰岛素抵抗指数(HOMA-IR)],氧化应激反应指标[丙二醛(MDA)、超氧化物歧化酶(SOD)]及不良反应。结果:治疗8周,观察组FBG、2 h PBG、Hb A1c、HOMA-IR、MDA水平较对照组低,HOMA-β、SOD水平较对照组高,差异具有统计学意义(P<0.05);观察组与对照组不良反应对比,差异无统计学意义(P>0.05)。结论:T2DM患者采用津力达颗粒辅助治疗可改善糖代谢与胰岛细胞功能,减轻氧化应激反应,且安全性好。
基金supported by the Special Fund for Agro-scientific Research in the Public Interest(20130313006,201503136)the National Natural Science Foundation of China(31660073)+1 种基金the National Key Research and Development Program of China(2017YFD0200803-04,2018YFD0800804,2017YFD0201900)the Youth Foundation of Xinjiang Academy of Agricultural Sciences(xjnkq-2015002)
文摘Biochar addition can improve the physical and hydraulic characteristics of sandy soil.This study investigated the effects of biochar on water holding capacity and water movement in sandy soil under drip irrigation.By indoor simulation experiments,the effects of biochar application at five levels(0%,1%,2%,4%and 6%)on the soil water retention curve,infiltration characteristics of drip irrigation and water distribution were tested and analyzed.The results showed that biochar addition rate was positively correlated with water holding capacity of sandy soil and soil available water.Within the same infiltration time,with an increasing amount of added biochar,the diffusion distance of the horizontal wetting front(HWF)tended to decrease,while the infiltration distance of vertical wetting front(VWF)initially declined and then rose.The features of wetted bodies changed from"broad-shallow"to"narrow-deep"type.The relationship between the transport distances of HWF and VWF and the infiltration time was described by a power function.At the same distance from the point source,the larger the amount of added biochar,the higher the soil water content.Biochar had a great influence on the water content of the layer with biochar(0–200 mm)and had some effects at 200–250 mm without biochar;but it had less influence on the soil water content deeper than 250 mm.For the application rate of biochar of 4%,most water was retained within 0–250 mm soil layer.However,when biochar application amount was high(6%),it would be helpful for water infiltration.During the improvement of sandy soil,biochar application rate of 4%in the plow layer had the best effect.
基金financially supported by the National Natural Science Foundation of China (41130640, 91425301, 41321001, 41401057)the projects from the State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University
文摘Stable isotopic compositions (δ18O and 6D) have been utilized as a useful indicator for evaluating the current and historical climatic and environmental changes. Therefore, it is vital to understand the relationship be- tween the stable isotopic contents in lake water and the variations of lake level, particularly in Lake Qinghai, China. In this study, we analyzed the variations of isotope compositions (δ18O, 6D and d-excess) in lake water and pre- cipitation by using the samples that were collected from Lake Qinghai region during the period from 2009 to 2012. The results showed that the average isotopic contents of δ18O and 6D in lake water were higher than those in pre- cipitation, which were contrary to the variations of d-excess. The linear regression correlations between δ18O and 6D in lake water and precipitation showed that the local evaporative line (LEL) in lake water (δD=5.88δ18O-2.41) deviated significantly from the local meteoric water line (LMWL)in precipitation (δD=8.26δ18O+16.91), indicating that evaporative enrichment had a significant impact on isotopic contents in lake water. Moreover, we also quanti- fied the Eli ratio (evaporation-to-input ratio) in Lake Qinghai based on the lake water isotopic enrichment model derived from the Rayleigh equation. The changes of E/I ratios (ranging from 0.29 to 0.36 between 2009 and 2012) clearly revealed the shifts of lake levels in Lake Qinghai in recent years. The average E/I ratio of 0.40 reflected that water budget in Lake Qinghai was positive, and consistent with the rising lake levels and the increasing lake areas in many lakes of the Tibetan Plateau. These findings provide some evidences for studying the hydrological balance or water budget by using δ18O values of lake sedimentary materials and contribute to the reconstruction of paleo- lake water level and paleoclimate from an isotopic enrichment model in Lake Qinghai.