With the widespread popularity of carbon neutrality,the decarbonization approach using carbon capture,utilization,and storage(CCUS)has grown from a low-carbon utilization technology to an indispensable technology for ...With the widespread popularity of carbon neutrality,the decarbonization approach using carbon capture,utilization,and storage(CCUS)has grown from a low-carbon utilization technology to an indispensable technology for the entire global carbon-neutral technology system.As a primary method to support CCUS research,source-sink matching models face several new demand-oriented challenges.Comprehensive research and in-depth insights are needed to guide targeted capability upgrades.This review evaluates the advances,challenges,and perspectives of various CCUS source-sink matching models developed in the past 10 years.We provide an integrated conceptual framework from six key attributes relating to mitigation targets,carbon sources,carbon sinks,transportation networks,utilization,and integration(synergy).The results indicate that previous models have effectively deepened our understanding of the matching process by targeting various CCUS-related issues and provided a solid foundation for more robust models to be developed.Six perspectives are put forward to outline research and development prospects for future models,which may have meaningful effects for advancement under emerging carbon neutrality targets.展开更多
AIM： To investigate the effect of quercetin （3,3,4,5, 7-pentahydroxy flavone）, a major flavonoid in human diet, on hyper-proliferation of gastric mucosal cells in rats treated with chronic oral ethanol. METHODS： F...AIM： To investigate the effect of quercetin （3,3,4,5, 7-pentahydroxy flavone）, a major flavonoid in human diet, on hyper-proliferation of gastric mucosal cells in rats treated with chronic oral ethanol. METHODS： Forty male Sprague-Dawley rats, weighing 200-250 g, were randomly divided into control group （tap wateradlibitum）, ethanol treatment group （6 mL/L ethanol）, quercetin treatment group （intragastric gavage with 100 mg/kg of quercetin per day）, and ethanol plus quercetin treatment group （quercetin and 6 mL/L ethanol）. Expression levels of proliferating cell nuclear antigen （PCNA）and Cyclin D1 were detected by Western blot to assay gastric mucosal cell proliferation in rats. To demonstrate the influence of quercetin on the production of extra-cellular reactive oxygen species/ nitrogen species （ROS/RNS） in rats, changes in levels of thiobarbituric acid reactive substance （TBARS）, protein carbonyl, nitrite and nitrate （NOx） and nitrotyrosine （NT） were determined. The activity of inducible nitric oxide synthase （NOS） including iNOS and nNOS was also detected by Western blot.RESULTS：Compared to control animals, cell proliferation in the gastric mucosa of animals subjected to ethanol treatment for 7 days was significant increased （increased to 290% for PCNA density P 〈 0.05, increased to 150 for Cyclin D1 density P 〈 0.05 and 21.6 ± 0.8 vs 42.3 ± 0.7 for PCNA positive cells per view field）, accompanied by an increase in ROS generation （1.298 ± 0.135 μmol vs 1.772 ± 0.078 μmol for TBARS P 〈 0.05; 4.36 ± 0.39 μmol vs 7.48 ± 0.40 μmol for carbonyl contents P 〈 0.05） and decrease in NO generation （11.334 ± 0.467 μmol vs 7.978 ± 0.334 μmol P 〈 0.01 for NOx; 8.986 ± 1.351 μmol vs 6.854 ± 0.460 μmol for nitrotyrosine P 〈 0.01） and nNOS activity （decreased to 43% P 〈 0.05）. This function was abolished by the co-administration of quercetin. CONCLUSION： The antioxidant action of quercetin relies, in part, on its ability to st展开更多
For sputtering targets, through-thickness texture is critical for assuring reliable sputtering performance.In this paper, through-thickness texture gradient of a rolled and subsequently annealed tantalum sputtering ta...For sputtering targets, through-thickness texture is critical for assuring reliable sputtering performance.In this paper, through-thickness texture gradient of a rolled and subsequently annealed tantalum sputtering target was investigated. The results show that by carefully controlling the rolling process, shear-related components at the surface of the rolled sample could be avoided. Both the rolled sample and the annealed target develop a through-thickness texture gradient with the formation of a stronger {1 1 1}fiber in the center layer compared with that in the surface layer.展开更多
基金supported by the financial support of the National Natural Science Foundation of China under Grant Nos.72174196,71874193,and 71203008.
文摘With the widespread popularity of carbon neutrality,the decarbonization approach using carbon capture,utilization,and storage(CCUS)has grown from a low-carbon utilization technology to an indispensable technology for the entire global carbon-neutral technology system.As a primary method to support CCUS research,source-sink matching models face several new demand-oriented challenges.Comprehensive research and in-depth insights are needed to guide targeted capability upgrades.This review evaluates the advances,challenges,and perspectives of various CCUS source-sink matching models developed in the past 10 years.We provide an integrated conceptual framework from six key attributes relating to mitigation targets,carbon sources,carbon sinks,transportation networks,utilization,and integration(synergy).The results indicate that previous models have effectively deepened our understanding of the matching process by targeting various CCUS-related issues and provided a solid foundation for more robust models to be developed.Six perspectives are put forward to outline research and development prospects for future models,which may have meaningful effects for advancement under emerging carbon neutrality targets.
基金State Education Ministry Scientific Research Foundation for the Returned Overseas Chinese Scholars, No. 1999747
文摘AIM： To investigate the effect of quercetin （3,3,4,5, 7-pentahydroxy flavone）, a major flavonoid in human diet, on hyper-proliferation of gastric mucosal cells in rats treated with chronic oral ethanol. METHODS： Forty male Sprague-Dawley rats, weighing 200-250 g, were randomly divided into control group （tap wateradlibitum）, ethanol treatment group （6 mL/L ethanol）, quercetin treatment group （intragastric gavage with 100 mg/kg of quercetin per day）, and ethanol plus quercetin treatment group （quercetin and 6 mL/L ethanol）. Expression levels of proliferating cell nuclear antigen （PCNA）and Cyclin D1 were detected by Western blot to assay gastric mucosal cell proliferation in rats. To demonstrate the influence of quercetin on the production of extra-cellular reactive oxygen species/ nitrogen species （ROS/RNS） in rats, changes in levels of thiobarbituric acid reactive substance （TBARS）, protein carbonyl, nitrite and nitrate （NOx） and nitrotyrosine （NT） were determined. The activity of inducible nitric oxide synthase （NOS） including iNOS and nNOS was also detected by Western blot.RESULTS：Compared to control animals, cell proliferation in the gastric mucosa of animals subjected to ethanol treatment for 7 days was significant increased （increased to 290% for PCNA density P 〈 0.05, increased to 150 for Cyclin D1 density P 〈 0.05 and 21.6 ± 0.8 vs 42.3 ± 0.7 for PCNA positive cells per view field）, accompanied by an increase in ROS generation （1.298 ± 0.135 μmol vs 1.772 ± 0.078 μmol for TBARS P 〈 0.05; 4.36 ± 0.39 μmol vs 7.48 ± 0.40 μmol for carbonyl contents P 〈 0.05） and decrease in NO generation （11.334 ± 0.467 μmol vs 7.978 ± 0.334 μmol P 〈 0.01 for NOx; 8.986 ± 1.351 μmol vs 6.854 ± 0.460 μmol for nitrotyrosine P 〈 0.01） and nNOS activity （decreased to 43% P 〈 0.05）. This function was abolished by the co-administration of quercetin. CONCLUSION： The antioxidant action of quercetin relies, in part, on its ability to st
基金financially supported by the National Natural Science Foundation of China (No.51301212)the Major National Science and Technology Projects of China (No.2011ZX02705)+1 种基金the Chongqing Science and Technology Commission in China (No.2012jj A50023)the Fundamental Research Funds for the Central Universities of China (No.CDJZR11130010)
文摘For sputtering targets, through-thickness texture is critical for assuring reliable sputtering performance.In this paper, through-thickness texture gradient of a rolled and subsequently annealed tantalum sputtering target was investigated. The results show that by carefully controlling the rolling process, shear-related components at the surface of the rolled sample could be avoided. Both the rolled sample and the annealed target develop a through-thickness texture gradient with the formation of a stronger {1 1 1}fiber in the center layer compared with that in the surface layer.
