Breeding and Application of Guidan 903,a New High-yield and Good-quality Maize Variety

To meet the demand of maize production in Guangxi and even the southwest region of China and realize the upgrading and undating of maize varieties which will continuously improve the yield and quality of maize,a new big-ear maize variety Guidan 903 with high yield,stable yield and good quality was established by the Maize Research Institute of Guangxi Academy of Agricultural Sciences with two self-selected inbred line GRL17349 and GRL21191 as female and male parents seperately.The average yield of this variety were 7429.5 and 7000.5 kg/hm^(2)in Guangxi Maize Regional Trial and Production Test respectively,which increased by 6.3%and 5.6%than the control(Guidan162).It was approved by Guangxi Zhuang Autonomous Region Crop Variety Certification Committee in June 2020(Approval No.Gui sheng yu 2020083).Determined by the Cereal Quality Supervision and Testing Center of Ministry of Agriculture and Rural Affairs(Bejjing),the grain bulk density,ratio of crude protein,crude fat,crude starch and lysine of Guidan 903 were 782 g/L,9.41%,6.19%,71.45%,0.35%respectively.This variety has the characterisics of strong resistance to collapse and disease,good quality,high and stable yield and wide adaptability.Furthermore,its seed yield is high with easy production technology and low cost.

新一代皮肤再生:生物材料和生物工程的机遇和挑战

Skin regeneration is a critical area of focus in modern medicine due to its potential to repair or replace damaged skin tissue resulting from various causes,including trauma,burns,chronic wounds,and genetic disorders[1].The global burden of skin-related health issues is substantial,with an estimated 1.5 billion people worldwide suffering from chronic skin conditions,and a significant proportion of these individuals require advanced treatments for skin regeneration[2].In China,skin diseases account for approximately20%of all outpatient visits to hospitals[3].

组织再生材料:从基础研究创新到临床转化应用

生物材料作为组织修复与再生医学研究中组织修复、器官再造与替代产品的重要内容,是材料学和生命科学的研发重点和热点.生物材料经历了第1代惰性材料和第2代具有活性或降解性质材料后,已发展到兼具可降解和生物活性的第3代生物材料.近年来,采用生物材料作为人工细胞外基质模板,利用生物材料仿生构建细胞的组织微环境,以期对细胞黏附、形态、增殖与分化以及组织结构和功能修复与器官重建起到重要调控作用.

Consensus on the application of negative pressure wound therapy of diabetic foot wounds

Because China is becoming an aging society,the incidence of diabetes and diabetic foot have been increasing.Diabetic foot has become one of the main health-related killers due to its high disability and mortality rates.Negative pressure wound therapy(NPWT)is one of the most effective techniques for the treatment of diabetic foot wounds and great progress,both in terms of research and its clinical application,has been made in the last 20 years of its development.However,due to the complex pathogenesis and management of diabetic foot,irregular application of NPWT often leads to complications,such as infection,bleeding and necrosis,that seriously affect its treatment outcomes.In 2020,under the leadership of Burns,Trauma and Tissue Repair Committee of the Cross-Straits Medicine Exchange Association,the writing group for‘Consensus on the application of negative pressure wound therapy of diabetic foot wounds’was established with the participation of scholars from the specialized areas of burns,endocrinology,vascular surgery,orthopedics and wound repair.Drawing on evidence-based practice suggested by the latest clinical research,this consensus proposes the best clinical practice guidelines for the application and prognostic evaluation of NPWT for diabetic foot.The consensus aims to support the formation of standardized treatment schemes that clinicians can refer to when treating cases of diabetic foot.

Synergistic effect of fluorination on both donor and acceptor materials for high performance non-fullerene polymer solar cells with 13.5% efficiency

A high performance polymer solar cells(PSCs) based on polymer donor PM6 containing fluorinated thienyl benzodithiophene unit and n-type organic semiconductor acceptor IT-4 F containing fluorinated end-groups were developed. In addition to complementary absorption spectra(300–830 nm) with IT-4 F, the PM6 also has a deep HOMO(the highest occupied molecular) level(-5.50 e V), which will lower the open-circuit voltage(V_(oc)) sacrifice and reduce the E_(loss) of the IT-4 F-based PSCs. Moreover, the strong crystallinity of PM6 is beneficial to form favorable blend morphology and hence to suppress recombination. As a result, in comparison with the PSCs based on a non-fluorinated D/A pair of PBDB-T:ITIC with a medium PCE of 11.2%, the PM6:IT-4 Fbased PSCs yielded an impressive PCE of 13.5% due to the synergistic effect of fluorination on both donor and acceptor, which is among the highest values recorded in the literatures for PSCs to date. Furthermore, a PCE of 12.2% was remained with the active layer thickness of up to 285 nm and a high PCE of 11.4% was also obtained with a large device area of 1 cm^2. In addition, the devices also showed good storage, thermal and illumination stabilities with respect to the efficiency. These results indicate that fluorination is an effective strategy to improve the photovoltaic performance of materials, as well as the both fluorinated donor and acceptor pair-PM6:IT-4 F is an ideal candidate for the large scale roll-to-roll production of efficient PSCs in the future.

Managing chronic wounds during novel coronavirus pneumonia outbreak

To the Editor In December of 2019,a widespread outbreak of novel coro-navirus pneumonia(NCP)occurred in Wuhan,China.On January 12,2020,the virus causing NCP was named as“2019-nCoV”by the World Health Organization[1,2].The World Health Organization renamed NCP as“COVID-19”.COVID-19 is a highly contagious respiratory virus that poses a serious threat to human health worldwide.At present,COVID-19 has been classified as a Class B infectious disease in China,and management of Class A infectious diseases has been adopted.As of March 10,2020,80932 cases were diagnosed and confirmed as COVID-19 in China,with 60002 cured cases and 3140 death.Meanwhile,34656 cases were diagnosed and confirmed as COVID-19 abroad.

平台企业社会责任的同伴效应:研究前沿与展望

平台企业社会责任的同伴效应是平台型企业在履行自我监管、自律、内容和安全审查、消费者权益保障、价值观引导等社会责任行为时,会模仿其他平台企业的社会责任行为,导致企业社会责任决策趋同的现象。概念缘起经历了同伴效应、企业社会责任同伴效应和平台企业社会责任同伴效应三个阶段。由于获取同伴企业的方式不同,平台企业社会责任同伴效应的识别可以分为时间模型和空间模型。平台企业社会责任同伴效应的理论基础包括竞争战略理论、制度理论、利益相关者理论、信号传递理论和羊群理论,形成过程包括平台共建机制、平台竞争机制、平台共享机制和平台共生机制四个方面。平台企业社会责任的同伴效应对企业竞争优势、双边用户信任、社会声誉和价值共创能够产生积极影响。未来研究应该着眼于平台企业社会责任同伴效应的理论体系、存在性识别和消极影响等方面。本文对平台企业履行社会责任的内在动机和完善平台企业的社会责任治理体系具有借鉴作用。