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Gut Microbiota and Short Chain Fatty Acids:Influence on the Autonomic Nervous System
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作者 Jessica Bruning Andrew Chapp +3 位作者 Gregory A.Kaurala Renjun Wang Stephen Techtmann Qing-Hui Chen 《神经科学通报:英文版》 SCIE CAS CSCD 2020年第1期91-95,共5页
Reaching across multiple fields of focus,spanning from periodontistry to gastroenterology to neurobiology to behavior,interest in the influence of the microbiome in human physiology and pathology has risen over the pa... Reaching across multiple fields of focus,spanning from periodontistry to gastroenterology to neurobiology to behavior,interest in the influence of the microbiome in human physiology and pathology has risen over the past few decades.Microbiota co-exist in and on humans forming an evolutionarily symbiotic biological unit,a halobiont,in which disruptions in the relationship can occur through genomic alterations and mutations[1],The human microbiome consists of bacteria,viruses,fungi,and protozoans that contribute 450 times more genes to this relationship and slightly outnumber human host cells[2,3].The bacteria in the gastrointestinal(GI)tract are of the most interest and exist within five phyla:Bacteroidetes,Firmicutes,Pro-teobacteria,Actinobacteria,and Verrucomicrobi&.Within the Verrucomicrobia an interesting bacterium has emerged. 展开更多
关键词 slightly alterations risen
Application of DInSAR for short period monitoring of initial subsidence due to longwall mining in the mountain west United States 预览
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作者 Jessica M.Wempen 《矿业科学技术学报:英文版》 CSCD 2020年第1期33-37,共5页
Differential Interferometric Synthetic Aperture Radar(DInSAR),a satellite-based remote sensing technique,has application for monitoring subsidence with high resolution over short periods.DInSAR uses radar images to me... Differential Interferometric Synthetic Aperture Radar(DInSAR),a satellite-based remote sensing technique,has application for monitoring subsidence with high resolution over short periods.DInSAR uses radar images to measure centimeter-level surface displacements.In the images,ground resolution can be relatively high,with each data point(pixel)representing the average displacement over an area of several square meters.The image data are acquired regularly which allows subsidence to be monitored sequentially over short periods;imaging periods typically range from weeks to months.Monitoring subsidence over short periods with high spatial resolution has potential to provide insight into the dynamics of subsidence and into relationships between mine advance and subsidence.In this study,for three longwall mines in the western United States,initial subsidence occurring at the start of longwall advance is quantified over short periods(12–72 days).C-band interferometric wide swath Synthetic Aperture Radar(SAR)images from the Sentinel satellites are used to quantify the subsidence.Overall,the data show initial development of subsidence,expansion of the subsidence trough,and the advance of subsidence in the direction of mining. 展开更多
关键词 Longwall mining INTERFEROMETRY SUBSIDENCE
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Investigating drivers of microbial activity and respiration in a forested bog
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作者 Kenna EREWCASTLE Jessica AMMOORE +5 位作者 Jeremiah AHENNING Melanie AMAYES Courtney MPATTERSON Gangsheng WANG Daniel BMETCALFE Aimée TCLASSEN 《土壤圈:英文版》 SCIE CAS CSCD 2020年第1期135-145,共11页
Northern peatlands store nearly one-third of terrestrial carbon(C)stocks while covering only 3%of the global landmass;nevertheless,the drivers of C cycling in these often-waterlogged ecosystems are different from thos... Northern peatlands store nearly one-third of terrestrial carbon(C)stocks while covering only 3%of the global landmass;nevertheless,the drivers of C cycling in these often-waterlogged ecosystems are different from those that control C dynamics in upland forested soils.To explore how multiple abiotic and biotic characteristics of bogs interact to shape microbial activity in a northern,forested bog,we added a labile C tracer(13C-labeled starch)to in situ peat mesocosms and correlated heterotrophic respiration with natural variation in several microbial predictor variables,such as enzyme activity and microbial biomass,as well as with a suite of abiotic variables and proximity to vascular plants aboveground.We found that peat moisture content was positively correlated with respiration and microbial activity,even when moisture levels exceeded total saturation,suggesting that access to organic matter substrates in drier environments may be limiting for microbial activity.Proximity to black spruce trees decreased total and labile heterotrophic respiration.This negative relationship may reflect the influence of tree evapotranspiration and peat shading effects;i.e.,microbial activity may decline as peat dries and cools near trees.Here,we isolated the response of heterotrophic respiration to explore the variation in,and interactions among,multiple abiotic and biotic drivers that influence microbial activity.This approach allowed us to reveal the relative influence of individual drivers on C respiration in these globally important C sinks. 展开更多
关键词 FOREST MOISTURE RESPIRATION
Ecology and management of Bactericera cockerelli and Candidatus Liberibacter solanacearum in New Zealand 预览
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作者 Jessica VEREIJSSEN 《农业科学学报:英文版》 SCIE CAS CSCD 2020年第2期333-337,共5页
The psyllid Bactericera cockerelli was first reported in New Zealand in 2006 and spread quickly throughout all potato growing regions.In 2009,B.cockerelli was associated with the plant pathogenic bacterium Candidatus ... The psyllid Bactericera cockerelli was first reported in New Zealand in 2006 and spread quickly throughout all potato growing regions.In 2009,B.cockerelli was associated with the plant pathogenic bacterium Candidatus Liberibacter solanacearum,the putative causal agent of zebra chip disease in potato.Both the psyllid and the bacterium have non-crop host plants which can serve as reservoirs when the crop is not available.Growers apply different management strategies that fit integrated pest management programmes to manage B.cockerelli and subsequently lower incidence of zebra chip disease in potato crops.Despite best management efforts,complete control of B.cockerelli and zero incidence of zebra chip disease are not achievable at the current time. 展开更多
关键词 Bactericera cockerelli Candidatus Liberibacter solanacearum POTATO insect vector
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A comparison of the relative efficiency of ICSI and extended culture with epididymal sperm versus testicular sperm in patients with obstructive azoospermia
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作者 Scott J Morin Brent M Hanson +4 位作者 Caroline R Juneau Shelby A Neal Jessica N Landis Richard T Scott Jr James M Hotaling 《亚洲男性学杂志:英文版》 SCIE CAS CSCD 2020年第2期222-226,共5页
This is a retrospective cohort study comparing blastocyst transfer outcomes following intracytoplasmic sperm injection utilizing epididymal versus testicular sperm for men with obstructive azoospermia.All cases at a s... This is a retrospective cohort study comparing blastocyst transfer outcomes following intracytoplasmic sperm injection utilizing epididymal versus testicular sperm for men with obstructive azoospermia.All cases at a single center between 2012 and 2016 were included.Operative approach was selected at the surgeon’s discretion and included microepididymal sperm aspiration or testicular sperm extraction.Blastocyst culture was exclusively utilized prior to transfer.The primary outcome was live birth rate.Secondary outcomes included fertilization rate,blastulation rate,euploidy rate,and implantation rate.A mixed effects model was performed.Seventy-six microepididymal sperm aspiration cases and 93 testicular sperm extraction cases were analyzed.The live birth rate was equivalent(48.6%vs 50.5%,P=0.77).However,on mixed effects model,epididymal sperm resulted in a greater likelihood of fertilization(adjusted OR:1.37,95%CI:1.05–1.81,P=0.02)and produced a higher blastulation rate(adjusted OR:1.41,95%CI:1.1–1.85,P=0.01).As a result,the epididymal sperm group had more supernumerary blastocysts available(4.3 vs 3,P<0.05).The euploidy rate was no different.Pregnancy rates were no different through the first transfer cycle.However,intracytoplasmic sperm injection following microepididymal sperm aspiration resulted in a greater number of usable blastocysts per patient.Thus,the true benefit of epididymal sperm may only be demonstrated via a comparison of cumulative pregnancy rates after multiple transfers from one cohort. 展开更多
关键词 AZOOSPERMIA intracytoplasmic sperm injection male infertility testicular sperm extraction
癌症的血液标志物
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作者 Jessica Watson Luke Mounce +3 位作者 Sarah ER Bailey Sharon L Cooper Willie Hamilton 时丹丹(译) 《英国医学杂志中文版》 2020年第2期112-115,共4页
一名61岁男子因背痛一个月,去看他的全科医生。他患有高血压,无吸烟史,并且近几个月感到疲劳,背痛使他彻夜难眠,没有体重减轻。临床检查结果正常。该患者的鉴别诊断范围很广,包括潜在的恶性疾病,例如胰腺癌、骨髓瘤、前列腺癌或转移瘤... 一名61岁男子因背痛一个月,去看他的全科医生。他患有高血压,无吸烟史,并且近几个月感到疲劳,背痛使他彻夜难眠,没有体重减轻。临床检查结果正常。该患者的鉴别诊断范围很广,包括潜在的恶性疾病,例如胰腺癌、骨髓瘤、前列腺癌或转移瘤。因为许多常见症状是非特异性的且低风险,故癌症难以识别,甚至众所周知的“警示”性症状对潜在的恶性肿瘤的阳性预测值(PPV)也相对较低1。 展开更多
关键词 全科医生 背痛 常见症状 转移瘤 前列腺癌 骨髓瘤 非特异性 胰腺癌
思维游戏
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作者 Jessica 《英语角》 2020年第2期44-47,58共5页
小明友们,你们喜欢动脑筋吗?你们能够通过事物表象看到本质吗?你们善于发现事物的规律吗?这里有五个思维小游戏,和秋天姐姐一起来挑战吧!
关键词 小游戏 动脑筋 善于发现 思维游戏
Alendronate disturbs femoral growth due to changes during immunolocalization of transforming growth factor-β1 and bone morphogenetic protein-2 in epiphyseal plate 预览
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作者 Juliana Souza Vieira Emanuelle Juliana Cunha +3 位作者 Juliana Feltrin de Souza Luis Henrique Koeler Chaves Jessica Lakes de Souza Allan Fernando Giovanini 《世界实验医学杂志》 2020年第1期1-9,共9页
BACKGROUND The epiphyseal growth plate is an important anatomical segment localized on the ends of a long bone.Despite the abovementioned atractive reasons for alendronate’s use,few data on the effect of alendronate ... BACKGROUND The epiphyseal growth plate is an important anatomical segment localized on the ends of a long bone.Despite the abovementioned atractive reasons for alendronate’s use,few data on the effect of alendronate during epiphyseal growth exist.AIM Verify the effect of alendronate on the growth epiphyseal plate,and compare its effect with the size of the femur during the double-staining of the immunolocalization of transforming growth factor-β1(TGF-β1)and bone morphogenetic protein-2(BMP2)in endochondral ossifing in specimens that have received alendronate.METHODS Forty newborn rats were randomly divided into two groups:a control group(were given applications of 1 mg/kg physiologic saline)and a group that received Alendronate(a dose of 2.5 mg/kg).These groups were then divided into two subgroups for euthanasia in two and 12 d of life.After euthanasia,the femurs were removed,and the femoral bones were measured linearly between the apex of the greater trochanter until the lower intercondylar midlle face to verify the probable bone growth between 3 and 12 d in control and alednroanto treated rats.Posteriorly,the surgical pieces were also sent to the histopathology laboratory to produce histological slides.The obtained slides were stained with hematoxylin and eosin to measure each of the cartilage zones in endochondral development.and other slides were immunohistochemically tested for anti-TGF-β1 and BMP-2 antibodies to investigate the immunolocalization of these proteins in the epiphyseal plaque area.RESULTS On the third day,some diferences between the control group and specimens treated with alendronate were verified.Macroscopiccaly,we found similarities in size between the femoral bones when we compared the control group with the specimens that received alendronate.On the 12^th day,the bone size of the mice receiving the drug was significantly smaller than those of the control group.These results coincide with changes in the TGF-β1 and BMP-2 expression.In the specimens that received alendronate,the TGF-β1 展开更多
关键词 ALENDRONATE BONE development Epiphyseal PLATE BONE morphogentic protein-2 TRANSFORMING growth factor-β1
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我们都是战士
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作者 Jessica Liu 《经营与管理》 2020年第4期1-1,F0002,F0003,共3页
Oesophageal atresia: The growth gap 预览
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作者 Isabelle Traini Jessica Menzies +2 位作者 Jennifer Hughes Steven Thomas Leach Usha Krishnan 《世界胃肠病学杂志:英文版》 SCIE CAS 2020年第12期1262-1272,共11页
Poor growth is an under-recognised yet significant long-term sequelae of oesophageal atresia(OA)repair.Few studies have specifically explored the reasons for growth impairment in this complex cohort.The association be... Poor growth is an under-recognised yet significant long-term sequelae of oesophageal atresia(OA)repair.Few studies have specifically explored the reasons for growth impairment in this complex cohort.The association between poor growth with younger age and fundoplication appears to have the strongest supportive evidence,highlighting the need for early involvement of a dietitian and speech pathologist,and consideration of optimal medical reflux management prior to referring for anti-reflux surgery.However,it remains difficult to reach conclusions regarding other factors which may negatively influence growth,due to conflicting findings,inconsistent definitions and lack of validated tool utilisation.While swallowing and feeding difficulties are particularly frequent in younger children,their relationship with growth remains unclear.It is possible that these morbidities impact on the diet of children with OA,but detailed analysis of dietary composition and quality,and its relationship with these complications and growth,has not yet been conducted.Another potential area of research in OA is the role of the microbiota in growth and nutrition.While the microbiota has been linked to growth impairment in other paediatric conditions,it is yet to be investigated in OA.Further research is needed to identify the most important contributory factors to poor growth,the role of the intestinal microbiota,and effective interventions to maximise growth and nutritional outcomes in this cohort. 展开更多
关键词 Oesophageal atresia GROWTH MALNUTRITION Feeding difficulty DYSPHAGIA MICROBIOTA
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思维游戏
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作者 Jessica 《英语角》 2020年第8期44-47,58,共5页
小朋友们,你们喜欢动脑筋吗?你们擅长透过事物表象看到本质吗?你们善于发现事物的规律吗?这里有三个思维小游戏,和秋天姐姐一起来挑战吧!
关键词 小游戏 善于发现 动脑筋 思维游戏 小朋友
今天,你焦虑吗? 预览
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作者 Jessica 《科学24小时》 2020年第2期50-51,共2页
如果有人问:你焦虑吗?我想,大部分人会说:“是啊,我很焦虑。”“我这次考试准备充分了吗?”“这次的任务完不成怎么办?”“女神是否会答应我的邀约?”……焦虑似乎无处不在。我们讨厌焦虑,也知道焦虑会让事情变得糟糕,甚至担忧自己是否... 如果有人问:你焦虑吗?我想,大部分人会说:“是啊,我很焦虑。”“我这次考试准备充分了吗?”“这次的任务完不成怎么办?”“女神是否会答应我的邀约?”……焦虑似乎无处不在。我们讨厌焦虑,也知道焦虑会让事情变得糟糕,甚至担忧自己是否患有焦虑症。但我们却不知该如何摆脱它。焦虑真的如此可怕吗? 展开更多
关键词 焦虑症 准备充分 无处不在
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Application of Avaatech X-ray fluorescence core-scanning in Sr/Ca analysis of speleothems
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作者 Dong LI Liangcheng TAN +9 位作者 Fei GUO Yanjun CAI Youbin SUN Gang XUE Xing CHENG Hong YAN Hai CHENG R.Lawrence EDWARDS Yongli GAO Jessica KELLEY 《中国科学:地球科学英文版》 SCIE EI CAS CSCD 2019年第6期964-973,共10页
Application of X-ray fluorescence core-scanning(XRF-CS) on both marine and lake sediments has achieved remarkable results. However, its application has not been widely extended to the research on speleothems. In this ... Application of X-ray fluorescence core-scanning(XRF-CS) on both marine and lake sediments has achieved remarkable results. However, its application has not been widely extended to the research on speleothems. In this study, we measure the Sr abundance and the Sr/Ca ratios of three stalagmites(two aragonite stalagmites, one calcite stalagmite) using the state-of-the-art fourth-generation Avaatech high-resolution XRF core scanner. Through comparisons among different scan paths and among different scan resolutions, as well as comparisons with inductively coupled plasma optical emission spectrometer(ICP-OES), Itrax XRF, and Artax XRF results, we confirm that the Avaatech XRF core scanner could precisely, quickly, and nondestructively analyze the high-resolution Sr abundance of speleothems. Furthermore, we combine the stalagmite δ18O records to explore the paleoclimatic significance of the measured stalagmite Sr/Ca. 展开更多
关键词 Avaatech XRF SPELEOTHEM Sr/Ca PALEOCLIMATE
Evaluation of the safety and effectiveness of direct oral anticoagulants and low molecular weight heparin in gastrointestinal cancer-associated venous thromboembolism 预览
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作者 Alejandro Recio-Boiles Sumana Veeravelli +6 位作者 Jessica Vondrak Hani M Babiker Aaron J Scott Rachna T Shroff Hitendra Patel Emad Elquza Ali McBride 《世界胃肠肿瘤学杂志:英文版(电子版)》 CAS 2019年第10期866-876,共11页
BACKGROUND Gastrointestinal cancer(GICA)is associated with a higher incidence of venous thromboembolism(VTE)compared to other solid tumors,moreover,recurrent VTE and major bleeding(MB)complications during anticoagulat... BACKGROUND Gastrointestinal cancer(GICA)is associated with a higher incidence of venous thromboembolism(VTE)compared to other solid tumors,moreover,recurrent VTE and major bleeding(MB)complications during anticoagulation treatment have an associated increase rate.GICA-VTE remains a challenging clinical scenario with MB concerns for utilization of direct oral anticoagulants(DOAC),especially with active cancer therapies.AIM To evaluate patient risk factors,effectiveness(VTE)and safety(MB)of DOACs and low molecular weight heparin(LMWH)in patients with active GICA-VTE.METHODS A retrospective chart review of patients receiving DOACs and LMWH with GICA and symptomatic or incidental VTE treated at comprehensive cancer center from November 2013 to February 2017 was performed.Inclusion criteria included active GI cancer diagnosed at any stage or treatment+/-6 mo of VTE diagnosis,whom were prescribed 6 mo or more of DOACs or LMWH.The Chi-squared test was used for overall and the Fisher exact test for pairwise comparisons of the proportions of patients experiencing recurrent VTE and MB events.Odds ratios were used to compare the relative odds of the occurrence of the outcome given exposure to the risk factor.RESULTS A total of 144 patients were prescribed anticoagulation,in which 106 fulfilled inclusion criteria apixaban(27.3%),rivaroxaban(34.9%)and enoxaparin(37.7%),and 38 were excluded.Patients median age was 66.5 years at GICA diagnosis and 67 years at CAVTE event,with 62%males,80%Caucasian,70%stage IV,pancreatic cancer(40.5%),30%Khorana Score(≥3 points),and 43.5%on active chemotherapy.Sixty-four percent of patients completed anticoagulation therapy(range 1 to 43 mo).Recurrent VTE at 6 mo was noted in 7.5%(n=3),6.8%(n=2)and 2.7%(n=1)of patients on enoxaparin,apixaban and rivaroxaban,respectively(all P=NS).MB at 6 mo were 5%(n=2)for enoxaparin,6.8%(n=2)for apixaban and 21.6%(n=8)for rivaroxaban(overall P=0.048;vs LMWH P=0.0423;all other P=NS).Significant predictors of a primary or secondary outcome for all anticoagulati 展开更多
关键词 DIRECT oral ANTICOAGULANTS Low molecular weight HEPARIN Gastrointestinal CANCER Venous THROMBOEMBOLISM CANCER ASSOCIATED thrombosis Clinical risk
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Changes in insomnia severity with advanced PAP therapy in patients with posttraumatic stress symptoms and comorbid sleep apnea:A retrospective,nonrandomized controlled study
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作者 Barry J.Krakow Natalia D.McIver +1 位作者 Jessica J.Obando Victor A.Ulibarri 《军事医学研究:英文版》 CAS CSCD 2019年第4期308-319,共12页
Background:Sleep disorders frequently occur in posttraumatic stress disorder(PTSD)patients.Chronic insomnia is a common feature of and criteria for the diagnosis of PTSD.Another sleep disorder,obstructive sleep apnea(... Background:Sleep disorders frequently occur in posttraumatic stress disorder(PTSD)patients.Chronic insomnia is a common feature of and criteria for the diagnosis of PTSD.Another sleep disorder,obstructive sleep apnea(OSA),also occurs frequently in PTSD,and emerging research indicates OSA fuels chronic insomnia.Scant research has investigated the impact of OSA treatment on insomnia outcomes(Insomnia Severity Index,ISI)in trauma survivors.Methods:OSA patients with moderately severe posttraumatic stress symptoms were studied in a retrospective chart review.Ninety-six patients who failed CPAP therapy due to expiratory pressure intolerance or complex sleep apnea or both underwent manual titration with advanced PAP modes[autobilevel(ABPAP);adaptive servo-ventilation(ASV)],which were subsequently prescribed.PAP use measured by objective data downloads divided the sample into three groups:compliant regular users(C-RU):n=68;subthreshold users(SC-RU):n=12;and noncompliant users(NC-MU):n=16.The average follow-up was 11.89±12.22 months.Baseline and posttreatment ISI scores were analyzed to assess residual insomnia symptoms as well as cure rates.Results:The C-RU group showed significant improvements in insomnia with very large effects compared to those in the NC-MU reference group(P=0.019).Insomnia severity significantly decreased in all three groups with large effects(C-RU,P=0.001;SC-RU,P=0.027;NC-MU,P=0.007).Hours of weekly PAP use and insomnia severity were inversely correlated(P=0.001,r=–0.321).However,residual insomnia symptoms based on established ISI cut-offs were quite common,even among the C-RU group.Post hoc analysis showed that several categories of sedating medications reported at baseline(hypnotics,anti-epileptic,opiates)as well as actual use of any sedating medication(prescription or nonprescription)were associated with smaller insomnia improvements than those in patients not using any sedating agents.Conclusions:In a retrospective,nonrandomized analysis of a select sample of sleep clinic patients with OSA an 展开更多
关键词 INSOMNIA Obstructive sleep APNEA Complex INSOMNIA CBT-I POSTTRAUMATIC stress symptoms CPAP Auto bi-level Adaptive servo-ventilation
SEX给生活加温给“性福”加分!
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作者 Jessica Press 张力(翻译) 《父母世界》 2019年第3期94-97,共4页
午后在沙发上做羞羞的事,沉浸在无尽的爱潮之中,像是一个世纪以前的事?事后,老公揶揄你,隔壁邻居肯定听见你刚刚的娇喘呻吟声,这种情景有多久没出现了?或者,事前一起淋浴,事后一起聊天,现在也只是遥远的回忆吗?“孩子又哭了!”“我背下... 午后在沙发上做羞羞的事,沉浸在无尽的爱潮之中,像是一个世纪以前的事?事后,老公揶揄你,隔壁邻居肯定听见你刚刚的娇喘呻吟声,这种情景有多久没出现了?或者,事前一起淋浴,事后一起聊天,现在也只是遥远的回忆吗?“孩子又哭了!”“我背下好像有一块乐高。”“孩子在敲门。”……自从有了“第三者”——孩子后,这种情不自禁、不受约束的情况总是不得已以更快的速度结束。 展开更多
关键词 加分 生活 孩子 第三者 速度
Implications of denitrification in the ecological status of an urban river using enzymatic activities in sediments as an indicator
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作者 Jessica Unda-Calvo Miren Martinez-Santos +1 位作者 Estilita Ruiz-Romera Juan Luis Lechuga-Crespo 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第1期255-268,共14页
A better understanding of the effects of a number of environmental factors on denitrification is vital for analyzing its role as nitrogen sink and providing deeper knowledge about the ecological status of a nitrate-ri... A better understanding of the effects of a number of environmental factors on denitrification is vital for analyzing its role as nitrogen sink and providing deeper knowledge about the ecological status of a nitrate-rich ecosystem.Since few studies have addressed the occurrence and implications of denitrification in river sediments,and complexity of interactions among all these environmental factors makes comprehension of the process difficult,the potential of sediments from the Deba River to attenuate nitrate excess through denitrification was investigated.For this purpose,we adapted an in uitro method to measure activities of two enzymes contributing to the entire multiple-step nitrate reduction:Nitrate Reductase and Nitrite Reductase.The environmental features that influence both or single enzymatic activities were identified as oxygen availability, regulated directly by the moisture content or indirectly through the aerobic respiration, organic matter and nitrate content of sediments,and electrical conductivity and exchangeable sodium percentage of water.Additionally,our results showed that Nitrate Reductase catalyzes the principal limiting step of denitrification in sediments.Therefore, taking this enzymatic activity as an indicator,the southern part of the Deba River catchment presented low potential to denitrify but nitrate-limited sediments,whereas the middle and northern parts were characterized by high denitrification potential but nitrate- rich sediments.In general,this study on denitrifying enzymatic activities in sediments evaluates the suitability of the management of the effluents from wastewater treatment plants and municipal sewages to ensure a good ecological status of the Deba River. 展开更多
关键词 Urban CATCHMENT SEDIMENTS DENITRIFICATION ENZYMATIC activity ECOLOGICAL status
Avaatech XRF岩芯扫描分析方法在石笋Sr/Ca测试中的应用 被引量:1
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作者 李东 谭亮成 +9 位作者 郭飞 蔡演军 孙有斌 薛刚 成星 晏宏 程海 RLawrence EDWARDS 高永利 Jessica KELLEY 《中国科学:地球科学》 CSCD 北大核心 2019年第6期1014-1023,共10页
XRF岩芯扫描分析方法在海洋和湖泊沉积环境变化方面的应用研究,已取得了显著的成果.然而,目前其应用还没有广泛拓展到洞穴石笋的研究中.在本文中,我们利用最先进的第四代Avaatech高分辨率XRF岩芯扫描仪测试了3根石笋(2根文石石笋, 1根... XRF岩芯扫描分析方法在海洋和湖泊沉积环境变化方面的应用研究,已取得了显著的成果.然而,目前其应用还没有广泛拓展到洞穴石笋的研究中.在本文中,我们利用最先进的第四代Avaatech高分辨率XRF岩芯扫描仪测试了3根石笋(2根文石石笋, 1根方解石石笋)的Sr元素以及Sr/Ca比值.通过不同扫描路径之间和不同扫描分辨率之间的对比,以及与ICP-OES、Itrax XRF和Artax XRF结果的对比,证实了Avaatech XRF岩芯扫描仪可以准确、快速、无损地进行石笋高分辨率Sr元素的测试.此外,我们还结合石笋氧同位素记录,尝试解释了所测石笋Sr/Ca的古气候意义. 展开更多
关键词 Avaatech XRF 石笋 Sr/Ca 古气候
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作者 Jessica Wohl 《现代广告》 2019年第14期64-65,共2页
通过技术锁定广告的目标受众仅仅是品牌营销者工作内容的一半,他们工作内容的另一半则是维持客户关系。诱人的奖励计划不仅能够让消费者轻松和已购品牌建立联系、为品牌提供大量的数据,而且奖励计划越完善,采纳率越高,所吸引的消费者就... 通过技术锁定广告的目标受众仅仅是品牌营销者工作内容的一半,他们工作内容的另一半则是维持客户关系。诱人的奖励计划不仅能够让消费者轻松和已购品牌建立联系、为品牌提供大量的数据,而且奖励计划越完善,采纳率越高,所吸引的消费者就越多。《哈佛商业评论》在2014年的一份报告中指出,获取新客户的成本是维护现有客户成本的5~25倍。 展开更多
关键词 客户忠诚计划 品牌互动 优惠券
Medical student depression and its correlates across three international medical schools 预览
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作者 Jessica A Gold Xinran Hu +8 位作者 Gan Huang Wan-Zhen Li Yi-Fan Wu Shan Gao Zhe-Ning Liu Mickey Trockel Wan-Zhen Li Robert M Rohrbaugh Kirsten M Wilkins 《世界精神病学杂志》 2019年第4期65-77,共13页
BACKGROUND Medical students have high rates of depression, anxiety, and burnout that have been found to affect their empathy, professional behaviors, and performance as a physician. While studies have examined predict... BACKGROUND Medical students have high rates of depression, anxiety, and burnout that have been found to affect their empathy, professional behaviors, and performance as a physician. While studies have examined predictors for burnout and depression in the United States (US), no study, to our knowledge, has compared depression in medical students cross-culturally, or has attempted to examine the effect of factors influencing rates including burnout, exercise, stress, unmet mental health needs, and region. AIM To examine rates of depression in three international cohorts of medical students, and determine variables that may explain these differences. METHODS Convenience samples of medical students from three countries (US, China, and a Middle Eastern country whose name remains anonymous per request from the school) were surveyed in this observational study. Using the Patient Health Questionnaire-2 (PHQ-2) and a modified Maslach Burnout Inventory, depression and burnout were examined among medical students from the three cohorts (n = 473). Chi-square test and analysis of variance were used to examine differences in demographics, behavioral, and psychological variables across these three schools to identify potentially confounding descriptive characteristics. Analysis of covariance compared depression and the emotional exhaustion component of burnout identified through Principal Component Analysis across countries. Multiple linear regression was used to analyze the impact of demographic, behavioral, and psychological variables on screening positive for depression. RESULTS Medical students from the Middle Eastern country had the highest rates of positive depression screens (41.1%), defined as a PHQ-2 score of ≥ 3, followed by China (14.1 %), and then the US (3.8%). More students in the Middle Eastern school had unmet mental health needs (50.8%) than at the medical school in China (34.8%) or the school in the US (32.8%)(Pearson chi-square significance < 0.05). Thus, PHQ-2 scores were adjusted for unmet mental health n 展开更多
关键词 Medical students WELLNESS BURNOUT DEPRESSION INTERNATIONAL
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