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Invasive grasses consistently create similar plant-soil feedback types in soils collected from geographically distant locations

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Journal of Plant Ecology 2016年第2期9卷 180-186页

作者： Lora B.perkins Gary Hatfield Erin K.Espeland Department of Natural resource Management South Dakota State University1 N.Campus Dr.BrookingsSD 57007USA Department of Mathematics and Statistics South Dakota State University100 Admin LaneBrookingsSD 57007USA Pest Management research Unit USDA-ARS NPARL1500 North Central AveSidneyMT 59270USA

Aims Plants of similar life forms and closely related species have been observed to create similar types of plant–soil feedbacks(PSFs).However,investigations of the consistency of PSFs within species have not yielded clear *** example,it has been reported that species create different types of PSFs in their native and introduced *** aim of this project is to examine if four species create similar PSF types from soils collected from widely distributed areas within their introduced *** soil for this project was collected from three areas in western North *** this design,we aim to determine species-and site-specific ability to create PSFs and if the type of PSF created is consistent in all soil from all three collection *** species examined are Agropyron cristatum,Centaurea solstitialis,Poa pratensis and Taeniatherum *** We used three-field collected soils(from northern Nevada,western Montana and eastern Montana)in a two-phase greenhouse experiment to quantify the type of PSFs created by four invasive *** first phase was a conditioning phase wherein each invasive species created species-specific changes to the *** second phase of the experiment was the response phase wherein both the conditioning species and a native phytometer were grown in the conditioned soil and in unconditioned(control)*** final aboveground biomass was used to evaluate the effect of conditioning and to determine the type of PSF created by each invasive *** Findings Our results suggest that three of our four study species did show consistency in relation to *** species *** and *** consistently created PSF types that benefit conspecifics more than heterospecifics(and thus are‘invasive’PSF types)and *** consistently exhibited no,or‘neutral’,*** fourth species(***)was inconsistent:in one soil,no feedback was created;in other soil,an invasive PSF was created and in t

关键词： plant-soil feedback invasion niche construction

Hidden heterogeneity and its influence on dengue vaccination impact

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Infectious Disease Modelling 2020年第1期5卷 783-797页

作者： Magdalene Walters T.Alex perkins Department of Biological Sciences and Eck Institute for Global Health University of Notre DameNotre DameIN46556USA

The CYD-TDV vaccine was recently developed to combat dengue,a mosquito-borne viral disease that afflicts millions of people each year throughout the tropical and subtropical *** rollout has been complicated by recent findings that vaccinees with no prior exposure to dengue virus(DENV)experience an elevated risk of severe disease in response to their first DENV infection subsequent to *** a result of these findings,guidelines for use of CYD-TDV now require serological screening prior to vaccination to establish that an individual does not fall into this high-risk *** complications mean that the public health impact of CYD-TDV vaccination is expected to be higher in areas with higher *** important practical difficulty with tailoring vaccination policy to local transmission contexts is that DENV transmission is spatially heterogeneous,even at the scale of neighborhoods or blocks within a *** raises the question of whether models based on data that average over spatial heterogeneity in transmission could fail to capture important aspects of CYD-TDV impact in spatially heterogeneous *** explored this question with a deterministic model of DENV transmission and CYD-TDV vaccination in a population comprised of two communities with differing transmission *** to the full model,a version of the model based on the average of the two communities failed to capture benefits of targeting the intervention to the high-transmission community,which resulted in greater impact in both communities than we observed under even *** addition,the model based on the average of the two communities substantially overestimated impact among vaccinated individuals in the low-transmission *** the event that the specificity of serological screening is not high,this result suggests that models that ignore spatial heterogeneity could overlook the potential for harm to this segment of the population.

关键词： Dengue Vector borne disease Dengvaxia CYD-TDV Computational modeling SIr r Spatial heterogeneity

Anodic Cyclizations, Seven-Membered rings, and the Choice of radical Cation *** Pathways

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Chinese Journal of Chemistry 2019年第7期37卷 672-678页

作者： robert J.perkins ruozhu Feng Qingquan Lu Kevin D.Moeller Department of Chemistry Washington University in St.Louis St.Louis MO 63130 USA

While many steps in an oxidative cyclization reaction can be important,it is the cyclization step itself that plays the central *** this step does not proceed well,then optimization of the rest of the sequence is *** report here that the key to the cyclization is channeling the reaction down the correct *** reactions require the use of a radical pathway and some require the use of a radical cation *** example of each is provided along with a strategy for accessing both pathways using a common intermediate.

关键词： Anodic Cyclizations Seven-Membered rings

Comparison in executive function in Chinese preterm and full-term infants at eight months

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Frontiers of Medicine 2018年第2期12卷 164-173页

作者： Yao Feng Hong Zhou Yan Zhang Anthony perkins Yan Wang Jing Sun Department of Child Adolescent and Women's Health School of Public Health Peking University Beoing 100191 China Menzies Health Institute Queensland Griffith University Gold Coast Queensland QLD 4222 Australia School of Medicine Griffith University Gold Coast Queensland QLD 4222 Australia

Executive function （EF） is increasingly recognized as being responsible for adverse developmental outcomes in preterm-born infants. Several perinatal factors may lead to poor EF development in infancy, and the deficits in EF can be identified in infants as young as eight months. A prospective cohort study was designed to study the EF in Chinese preterm infants and examine the relationship between EF in preterm infants and maternal factors during perinatal period. A total of 88 preterm infants and 88 full-term infants were followed from birth to eight months （corrected age）. Cup Task and Planning Test was applied to assess the EF of infants, and the Bayley Scale of Infant Development （BSID-III） was used to evaluate cognitive （MDI） and motor abilities （PDI） of infants. In comparison with full-term infants, the preterm infants performed more poorly on all measures of EF including working memory, inhibition to prepotent responses, inhibition to distraction, and planning, and the differences remained after controlling the MDI and PDI. Anemia and selenium deficiency in mothers during pregnancy contributed to the differences in EF performance. However, maternal depression, hypertension, and diabetes during pregnancy were not related to the EF deficits in preterm infants. Future research should focus on the prevention of anemia and selenium deficiency during pregnancy and whether supplementing selenium in mothers during pregnancy can prevent further deterioration and the development of adverse outcomes of their offspring.

关键词： executive function (EF) preterm infant working memory inhibition to prepotent response inhibition to distraction planning

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MOBILE INETErNET

China Communications 2013年第6期10卷 I0002-I0003页

作者：张平 Charles E. perkins the School of Information and Communication Engineering of BUPT information sciences of Chinese Science Bulletin the Special Government Allowance of State Council of China Futurewei Mobile Communications and Computing review the official publication of ACM SIGMOBILE IEEE Internet Computing magazine

As most terminals sold today offer wireless Internet connectivity as a primary feature for personal communication requirements, the "Mobile Internet" is rapidly flourishing in the information society. And, yet,

关键词：移动互联网 LNTErNET 互联网连接互联网安全个人通信信息社会持续增长工程师

Signet-ring cell carcinoma of the stomach: Impact on prognosis and specific therapeutic challenge

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World Journal of Gastroenterology 2015年第40期21卷 11428-11438页

作者： Simon Pernot Thibault Voron Geraldine perkins Christine Lagorce-Pages Anne Berger Julien Taieb Department of Gastroenterology and Digestive Oncology Georges-Pompidou European Hospital Department of Digestive Surgery Georges-Pompidou European Hospital Department of Genetic Georges-Pompidou European Hospital Department of Pathology GeorgesPompidou European Hospital

While the incidence of gastric cancer has decreased worldwide in recent decades,the incidence of signetring cell carcinoma(SrCC) is rising. SrCC has a specific epidemiology and oncogenesis and has two forms: early gastric cancer,which can be resected endoscopically in some cases and which has a better outcome than non-SrCC,and advanced gastric cancer,which is generally thought to have a worse prognosis and lower chemosensitivity than non-SrCC. However,the prognosis of SrCC and its chemosensitivity with specific regimens are still controversial as SrCC is not specifically identified in most studies and its poor prognosis may be due to its more advanced stage. It therefore remains unclear if a specific therapeutic strategy is justified,as the benefit of perioperative chemotherapy and the value of taxanebased chemotherapy are unclear. In this review we analyze recent data on the epidemiology,oncogenesis,prognosis and specific therapeutic strategies in both early and advanced SrCC of the stomach and in hereditary diffuse gastric cancer.

关键词： Gastric cancer Signet ring cell carcinoma Diffuse

perkins携新品亮相2015上海国际动力展

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电机与控制应用 2015年第6期42卷 86-87页

作者： perkins发动机有限公司 perkins发动机有限公司

2015年5月13~15日,perkins携带其1500系列发动机亮相第十四届中国（上海）国际动力设备及发电机组展览会。perkins此次展出了研发团队的最新力作1500系列发动机。该系列产品投产后将取代perkins现有发电用发动机阵容中的1300和1600系列... 详细信息

2015年5月13~15日,perkins携带其1500系列发动机亮相第十四届中国（上海）国际动力设备及发电机组展览会。perkins此次展出了研发团队的最新力作1500系列发动机。该系列产品投产后将取代perkins现有发电用发动机阵容中的1300和1600系列。＂1500系列发动机设计完全能满足发电机组制造商的需求,除载荷承受能力有所提升外,油耗更可降低7%,高海拔和特殊环境下的性能表现也改善多达8％。

关键词：动力设备发动机设计 perkins 系列产品客户服务涡轮增压朱恩中国企业热带气候恩达

perkins携多款新品亮相中国（上海）国际动力设备及发电机组展

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电机与控制应用 2016年第6期43卷 94-95页

作者： perkins发动机有限公司

2006年，perkins在上海设立办事处。2008年，perkins在中国无锡独资建立了第一个工厂，目前无锡工厂和上海办公室的员工将近500人。perkins发电用产品营销经理葛赛民（Simon Gray）说：“中国的发电机市场增长非常强劲，perkins正在积... 详细信息

2006年，perkins在上海设立办事处。2008年，perkins在中国无锡独资建立了第一个工厂，目前无锡工厂和上海办公室的员工将近500人。perkins发电用产品营销经理葛赛民（Simon Gray）说：“中国的发电机市场增长非常强劲，perkins正在积极将解决方案本土化，并不断努力跟上“中国制造2025”和“工业4．0”的发展。”

关键词：中国制造发电机组动力设备上海国际营销经理市场增长办公室

Enhancing the clinical relevance of haemorrhage prediction models in trauma

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Military Medical research 2024年第3期11卷 467-468页

作者： Sankalp Tandle Jared M.Wohlgemut Max E.r.Marsden Erhan Pisirir Evangelia Kyrimi rebecca S.Stoner William Marsh Zane B.perkins Nigel r.M.Tai Centre for Trauma Sciences Blizard InstituteQueen Mary University of LondonLondon E12ATUK The royal London Hospital Barts Health NHS TrustLondon E11FRUK Academic Department of Military Surgery and Trauma Research and Clinical InnovationThe Royal Centre for Defence MedicineBirmingham B152WBUK Department of Electronic Engineering and Computer Science Queen Mary University of LondonLondon E14NSUK

We read with interest the recent systematic reviewaArtificial intelligence and machine learning for hemorrhagic trauma careoby Peng et al.[1],which evaluated literature on machine learning(ML)in the management of trau... 详细信息

关键词： Trauma Injury Blood transfusion Massive transfusion Prediction Artificial intelligence Machine learning