检索结果-南通市图书馆

Does Green Food Certification promote agri-food export quality?Evidence from China

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第3期23卷 1061-1074页

作者： ping wei Hongman Liu Chaokai Xu Shibin Wen College of Economics and Management China Agricultural UniversityBeijing 100083China School of Public Affairs Zhejiang UniversityHangzhou 310058China

The construction of a food certification system plays a vital role in upgrading export quality, which previous studies have largely overlooked. We match China's industry-level data of Green Food Certification with its HS6-digit export data of agri-food products to quantify the impact of Green Food Certification on export quality. We identify the significant and positive effect of Green Food Certification on export quality. The 2SLS estimation based on instrumental variables and a range of robustness checks confirm the validity and robustness of the benchmark conclusions. Further analysis discloses that Green Food Certification improves export quality by raising agricultural production efficiency and brand premiums. Heterogeneity analysis shows that the effect of Green Food Certification varies across regions, notably improving the quality of agri-food products exported to developed regions and regions with high levels of import supervision. Furthermore, among various product types, Green Food Certification significantly improves the export quality of primary products and products vulnerable to non-tariff measures. The above findings could guide the future development of agri-food quality certification systems, potentially leading to a transformation and promotion of the agri-food trade.

关键词： Green Food Certification agri-food products green transformation export quality food labeling

Effects of counter-current driven by electron cyclotron waves on neoclassical tearing mode suppression

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第5期33卷 501-509页

作者：高钦郑平卫 School of Resource Environment and Safety Engineering University of South ChinaHengyang 421001China Demonstration Base for International Science and Technology Cooperation on Nuclear Energy and Nuclear Safety University of South ChinaHengyang 421001China

Through theoretical analysis,we construct a physical model that includes the influence of counter-external driven current opposite to the plasma current direction in the neoclassical tearing mode(NTM).The equation is used with this model to obtain the modified Rutherford equation with co-current and counter-current *** with the reported experimental results,numerical simulations have shown that the localized counter external current can only partially suppress NTM when it is far from the resonant magnetic *** some circumstances,the Ohkawa mechanism dominated current drive(OKCD)by electron cyclotron waves can concurrently create both co-current and *** this instance,the minimal electron cyclotron wave power that suppresses a particular NTM was calculated by the Rutherford *** result is marginally less than when taking co-current alone into *** a result,to suppress NTM using OKCD,one only needs to align the co-current with a greater OKCD peak well with the resonant magnetic *** effect of its lower counter-current does not need to be considered because the location of the counter-current deviates greatly from the resonant magnetic surface.

关键词： driven current neoclassical tearing mode modified Rutherford equation electron cyclotron waves

Energy band modulation of N-doped rutile/anatase TiO_(2) photoanode promoting charge separation toward prominent photoelectrochemical performance

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第8期43卷 3784-3797页

作者： Juan Gao Shi-Xuan Wang Jia-Le Deng ping-ping wei Fu-Zhang Chen Ling-Cheng Zheng Yue-Qin Wang Yang Li Yin Liu Gang He School of Mechanics and Photoelectric Physics Anhui University of Science and TechnologyHuainan 232001China School of Materials Science and Engineering Anhui UniversityHefei230039China Tianneng Battery(Wuhu)Co. Ltd.Wuhu 241000China School of Materials Science and Engineering Anhui University of Science and TechnologyHuainan 232001China

To solve the problem of high photogenerated carrier recombination rate and low photoelectric conversion efficiency of TiO_(2)-based materials,a simple N-doped anatase/rutile TiO_(2) heterophase nanorod film was designed by a low-temperature hydrothermal method in this *** enhanced separation and transport of photogenerated charges were facilitated by the smaller contact barrier and appropriate band matching between anatase TiO_(2)nanoparticles and rutile TiO_(2) *** introduction of N doping in anatase TiO_(2) resulted in an upward shift of the valence band and a narrowing of the band gap,consequently enhancing the efficiency of visible light *** combination of the heterophase junction and N-doping exhibited a synergistic effect,effectively suppressing the recombination of photogenerated charges and enhancing the photoelectric conversion efficiency of the *** AM 1.5G irradiation,the photocurrent density(J)of the A-TO(N)@R-TONR photoanode reached2.19 mA·cm^(-2)(V_(RHE,1.23 eV)).Additionally,the incident photon-electron conversion efficiency(IPCE)and the charge injection efficiency(η)reached 81.4%and 51.6%at320 ***,the J,IPCE,andηvalues of the A-TO(N)@R-TONR photoanode were 2.96,2.1 and 3.2times those of pure R-TONR photoanode,*** work presents a rational strategy for designing efficient TiO_(2)-based photoanodes.

关键词： TiO_(2) Heterophase junction Photoanode

Embryo Transfer Strategies for Women with Recurrent Implantation Failure During the Frozen-thawed Embryo Transfer Cycles:Sequential Embryo Transfer or Double-blastocyst Transfer?

在线全文

学校读者我要写书评

暂无评论

Current Medical Science 2024年第1期44卷 212-222页

作者： Qiao-hang ZHAO Yu-wei SONG Jian CHEN Xiang ZHOU Ji-lai XIE Qiu-ping YAO Qi-yin DONG Chun FENG Li-ming ZHOU wei-ping FU Min JIN The Second Affiliated Hospital of Zhejiang University School of Medicine Hangzhou 310052China Jiaxing Maternity and Child Health Care Hospital Jiaxing 314051China Huzhou Maternity and Child Care Hospital Huzhou 313002China Ningbo Women and Children's Hospital Ningbo 315000China

Objective Both sequential embryo transfer(SeET)and double-blastocyst transfer(DBT)can serve as embryo transfer strategies for women with recurrent implantation failure(RIF).This study aims to compare the effects of SeET and DBT on pregnancy *** Totally,261 frozen-thawed embryo transfer cycles of 243 RIF women were included in this multicenter retrospective *** to different embryo quality and transfer strategies,they were divided into four groups:group A,good-quality SeET(GQ-SeET,n=38 cycles);group B,poor-quality or mixed-quality SeET(PQ/MQ-SeET,n=31 cycles);group C,good-quality DBT(GQ-DBT,n=121 cycles);and group D,poor-quality or mixed-quality DBT(PQ/MQ-DBT,n=71 cycles).The main outcome,clinical pregnancy rate,was compared,and the generalized estimating equation(GEE)model was used to correct potential confounders that might impact pregnancy *** GQ-DBT achieved a significantly higher clinical pregnancy rate(aOR 2.588,95%CI 1.267–5.284,P=0.009)and live birth rate(aOR 3.082,95%CI 1.482–6.412,P=0.003)than PQ/***,the clinical pregnancy rate was significantly higher in GQ-SeET than in PQ/MQ-SeET(aOR 4.047,95%CI 1.218–13.450,P=0.023).The pregnancy outcomes of GQ-SeET were not significantly different from those of GQ-DBT,and the same results were found between PQ/MQ-SeET and PQ/*** SeET relative to DBT did not seem to improve pregnancy outcomes for RIF patients if the embryo quality was comparable between the two *** clinical pregnancy outcomes could be obtained by transferring good-quality embryos,no matter whether in SeET or *** quality plays a more important role in pregnancy outcomes for RIF patients.

关键词： recurrent implantation failure sequential embryo transfer frozen-thawed embryo transfer embryo transfer strategies

Effects of exercise training on glucose metabolism indicators and inflammatory markers in obese children and adolescents:A metaanalysis

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Diabetes 2024年第6期15卷 1353-1366页

作者： Le-Yang Li Song-Mei Li Bo-Xian Pang Jun-ping wei Qiu-Hong Wang Department of Endocrinology Guang’anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China Graduate School Beijing University of Chinese MedicineBeijing 100029China

BACKGROUND Obesity in children and adolescents is a serious problem,and the efficacy of exercise therapy for these patients is *** To assess the efficacy of exercise training on overweight and obese children based on glucose metabolism indicators and inflammatory *** The PubMed,Web of Science,and Embase databases were searched for randomized controlled trials related to exercise training and obese children until October *** meta-analysis was conducted using RevMan 5.3 software to evaluate the efficacy of exercise therapy on glucose metabolism indicators and inflammatory markers in obese *** In total,1010 patients from 28 studies were *** therapy reduced the levels of fasting blood glucose(FBG)[standardized mean difference(SMD):-0.78;95%confidence interval(CI):-1.24 to-0.32,P=0.0008],fasting insulin(FINS)(SMD:-1.55;95%CI:-2.12 to-0.98,Pweight and obese *** training increased adiponectin levels(SMD:1.24;95%CI:0.30 to 2.18,P=0.01)but did not improve tumor necrosis factor-alpha(TNF-α)levels(SMD:-0.80;95%CI:-1.77 to 0.18,P=0.11).CONCLUSION In summary,exercise therapy improves glucose metabolism by reducing levels of FBG,FINS,HOMA-IR,as well as improves inflammatory status by reducing levels of IL-6,CRP,leptin,and increasing levels of adiponectin in overweight and obese *** was no statistically significant effect between exercise training and levels of TNF-α.Additional long-term trials should be conducted to explore this therapeutic perspective and confirm these results.

关键词： Exercise training Obesity Children and adolescents Glucose metabolism Inflammatory markers Meta-analysis

Identification and characterization of chemical constituents in Mahuang Guizhi Decoction and their metabolites in rat plasma and brain by UPLC-Q-TOF/MS

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Herbal Medicines 2024年第3期16卷 466-480页

作者： ping wei Shiying Huang Juan Yang Mo Zhao Qiugu Chen Xiaoyu Deng Jianping Chen Yisheng Li pingshan District Maternal&Child Healthcare Hospital of Shenzhen Pingshan General Hospital of Southern Medical UniversityShenzhen 518118China Shenzhen Key Laboratory of Hospital Chinese Medicine Preparation Shenzhen Traditional Chinese Medicine HospitalThe Fourth Clinical Medical College of Guangzhou University of Chinese MedicineShenzhen 518000China Shenzhen Longgang Otorhinolaryngology Hospital Shenzhen 518100China

Objective:Mahuang Guizhi Decoction(MGD),an essential herbal pair in traditional Chinese medicine,is able to release cold,fever and asthma,mainly containing alkaloids,flavonoids,phenylpropanoids and amino ***,the absorption and distribution of these four category compounds in vivo still remained ***:In our research,we utilized UPLC-Q-TOF-MS technique to identify the constituents within MGD,as well as the prototypes of MGD and their metabolites absorbed in plasma and *** further profiled the drug-time curve of prototypes and metabolites of MGD both in plasma and ***:Our results showed that 105 constituents were characterized in *** of them could be absorbed into blood,and ten of them could be distributed into *** also discovered eight new bio-transformed metabolites in blood,and a half of which could pass through the blood–brain *** addition,all components detected in vivo could be absorbed and distributed ***:These findings provide an approachable method to analyze the potential bio-active compounds in MGD and their in vivo behaviors,which could promote the efficacious material basis study of MGD and the security of clinical utilization.

关键词： chemical constituents Mahuag Guizhi Decoction metabolites rat plasma and brain UPLC-Q-TOF-MS

Low-noise and low-power pixel sensor chip for gas pixel detectors

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第3期35卷 142-152页

作者： Zhuo Zhou Shi-Qiang Zhou Dong Wang Xiang-Ming Sun Chao-Song Gao Peng-Zhen Zhu wei-ping Ren Jun Liu Mu-Xian Li Chen Lian Chun-Lai Dong PLAC Key Laboratory of Quark and Lepton Physics(MOE)Central China Normal UniversityWuhan 430079China

Topmetal-M2 is a large-area pixel sensor chip fabricated using the GSMC 130 nm CMOS process in *** pixel array of Topmetal-M2 consists of pixels of 400 rows×512 columns with a pixel pitch of 45μm×45μ*** array is divided into 16 subarrays,with pixels of 400 rows×32 columns per *** pixel incorporates two charge sensors:a diode sensor and a Topmetal *** in-pixel circuit primarily consists of a charge-sensitive amplifier for energy measurements,a discriminator with a peak-holding circuit,and a time-to-amplitude converter for time-of-arrival *** pixel of Topmetal-M2 has a charge input range of~0-3 k e-,a voltage output range of~0-180 mV,and a charge-voltage conversion gain of~59.56μV∕e-.The average equivalent noise charge of Topmetal-M2,which includes the readout electronic system noise,is~43.45 e-.In the scanning mode,the time resolution of Topmetal-M2 is 1 LSB=1.25μs,and the precision is^()7.41μ*** an operating voltage of 1.5 V,Topmetal-M2 has a power consumption of~49 mW∕cm~*** this article,we provide a comprehensive overview of the chip architecture,pixel working principles,and functional behavior of ***,we present the results of preliminary tests conducted on Topmetal-M2,namely,alpha-particle and soft X-ray tests.

关键词： Charge collection Gas detectors Semiconductor detectors X-ray detectors

Novel de novo TRPV4 mutation identified in a Chinese family with metatropic dysplasia inhibits chondrogenic differentiation

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第3期11卷 83-86页

作者： ping wei weizhe Shi Tianying Nong Caixia Xian Xia Li Zhaohui Li Xin Li Jianping Wu Liyuan Shang Fulong Xu Yibo Xu Hongwen Xu Mingwei Zhu Guangzhou Institute of Pediatrics Guangzhou Women and Children's Medical CenterGuangzhou Medical UniversityGuangdong Provincial Clinical Research Center for Child HealthGuangzhouGuangdong 510623China Department of Pediatric Orthopedics Guangzhou Women and Children's Medical CenterGuangzhou Medical UniversityGuangdong Provincial Clinical Research Center for Child HealthGuangzhouGuangdong 510623China

Metatropicdysplasia(MD,MIM156530)is a rare congenital bone dysplasia primarily characterized by severe platyspondyly with long and wide vertebral bodies and dumbbell deformity of the tubular *** can be caused by heterozygous mutations in the gene encoding transient receptor potential vanilloid family member 4(TRPV4).We identifieda novel de novo mutation,c.2353T>C,in the TRPV4 gene,in a Chinese family with mild MD.

关键词： TRPV4 dysplasia congenital

《马克思恩格斯全集》(MEGA^(2))的理论价值与现实意义

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

吉林大学社会科学学报 2024年第2期64卷 24-30页

作者：魏小萍新疆大学马克思主义学院中国社会科学院哲学研究所北京100732

2004年3月,《吉林大学社会科学学报》开设“探索当代中国哲学的道路”专栏,在国内期刊界率先提出,要引导和推动当代中国哲学的观念创新,探索和创造具有中国气质的当代中国哲学形态。经历二十年的栏目坚守与学界同仁的努力,探索当代中国... 详细信息

2004年3月,《吉林大学社会科学学报》开设“探索当代中国哲学的道路”专栏,在国内期刊界率先提出,要引导和推动当代中国哲学的观念创新,探索和创造具有中国气质的当代中国哲学形态。经历二十年的栏目坚守与学界同仁的努力,探索当代中国哲学的道路,建设具有主体性、原创性的当代中国哲学,已经构成了中国哲学学者共同的思考背景和自觉追求。需要注意的是,中国的发展已进入新的历史方位,“探索当代中国哲学的道路”也应随之进入新的理论境界,面对复杂而真实的世界历史,我们必须不断审视当代中国哲学的内涵、定位及发展方向。这就要求我们,在21世纪的第三个十年,必须重新界定当代中国哲学与世界文明的关系,开启中西方哲学比较的全新视野;必须不断追问中国哲学的古今之变,推动当代中国哲学的基础理论研究与范式转换。基于此,本期拟呼应开栏首期的笔谈文章,以“比较与转换”为题,邀请学界专家从民族性与人类性的统一、中西哲学基本建制的区别、马克思主义哲学与西方哲学研究的范式转变等角度,在“接着讲”的意义上再谈“探索当代中国哲学的道路”。

关键词：期刊界当代中国哲学西方哲学研究社会科学学报学界专家范式转变中西方哲学学界同仁