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Size-dependent flight capacity and propensity in a range-expanding invasive insect

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Insect Science 2022年第3期29卷 879-888页

作者： chelsea Jahant-Miller Russell Miller Dylan Parry Forest Health Protection U.S.Forest ServiceCoeur d’AleneID83815USA School for Environment and Sustainability Cooperative Institute for Great Lakes ResearchUniversity of MichiganAnn ArborMl48106USA Department of Environmental and Forest Biology College of Environmental Science and ForestryState University of New YorkSyracuseNY13210USA

For capital-breeding insects,all resources available for adult metabolic needs are accumulated during larval ***,body size at adult eclosion represents the total energetic capacity of the *** female capital breeders,body size is strongly correlated with lifetime fecundity,while in males,body size,which correlates with fitness,is less *** capital-breeding species with wingless,flightless,or dispersal-limited females,flight potential for male Lepidoptera has important implications for mate-finding and may be correlated with body *** low population densities,failure to mate has been identified as an important Allee effect and can drive the success or failure of invasive species at range edges and in species of conservation *** capital-breeding European subspecies of Lymantria dispar(L.),was introduced to North America in 1869 and now ranges across much of eastern North *** ***,females are flightless and mate-finding is entirely performed by *** quantified male *** flight capacity and propensity relative to morphological and physiological characteristics using fixed-arm flight mills.A range of male body sizes was produced by varying the protein content of standard artificial diets while holding other dietary components *** length,a proxy for body size,relative thorax mass,and forewing aspect were all important predictors of total flight distance and maximum *** results have important implications for mate-finding and invasion dynamics in *** and may apply broadly to other capital-breeding insects.

关键词： flight mill Lymantria dispar life-history invasion dynamics selective pressure

Dynamic changes in proprotein convertase 2 activity in cortical neurons after ischemia/reperfusion and oxygen-glucose deprivation

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Neural Regeneration Research 2013年第1期8卷 83-89页

作者： Shuqin Zhan An Zhou chelsea Piper Tao Yang Department of Neurology the Second Affiliated Hospital Medical School of Xi'an Jiaotong University Robert S. Dow Neurobiology Laboratories Legacy Clinic Research and Technology Center

In this study, a rat model of transient focal cerebral ischemia was established by performing 100 minutes of middle cerebral artery occlusion, and an in vitro model of experimental oxygen-glucose deprivation using cultured rat cortical neurons was established. Proprotein convertase 2 activity gradually decreased in the ischemic cortex with increasing duration of reperfusion. In cultured rat cortical neurons, the number of terminal deoxynucleotidyl transferase-mediated 2＇-deoxyuridine 5＇-triphosphate-biotin nick end labeling-positive neurons significantly increased and proprotein convertase 2 activity also decreased gradually with increasing duration of oxygen-glucose deprivation. These experimental findings indicate that proprotein convertase 2 activity decreases in ischemic rat cortex after reperfusion, as well as in cultured rat cortical neurons after oxygen-glucose deprivation. These changes in enzyme activity may play an important pathological role in brain injury.

关键词： neural regeneration brain injury proprotein convertase 2 cortex neuron cerebralischemia/reperfusion oxygen-glucose deprivation in vivo study in vitro study grants-supportedpaper photographs-containing paper neuroregeneration

Screening colonoscopy:The present and the future

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World Journal of Gastroenterology 2021年第3期27卷 233-239页

作者： chelsea V Hayman Dinesh Vyas College of Medicine California Northstate UniversityElk GroveCA 95757United States Department of Surgery San Joaquin General HospitalFrench CampCA 95231United States

In the United States,colorectal cancer(CRC)is the second leading cause of mortality in men and *** are now seeing an increasing number of patients with advanced-stage diagnosis and mortality from colorectal cancer before 50 years of age,which requires earlier *** the increasing need for CRC screening through colonoscopy,and thus endoscopists,easier and simpler techniques are needed to train proficient *** most widely used approach by endoscopists is air insufflation colonoscopy,where air distends the colon to allow visualization of the colonic *** technique is uncomfortable for patients and requires an anesthetist to administer *** addition,patients commonly complain about discomfort post-op as air escapes into the small bowel and cannot be adequately *** research into the use of water insufflation colonoscopies has proved promising in reducing the need for sedation,decreasing discomfort,and increasing the visibility of the colonic *** direction into water insufflation colonoscopies which have shown to be simpler and easier to teach may increase the number of proficient endoscopists in training to serve our aging population.

关键词： Colorectal cancer Water-insufflation colonoscopy Air-insufflation colonoscopy Adenomatous polyps Adenoma detection rate

Disinfection byproduct regulatory compliance surrogates and bromide-associated risk

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Journal of Environmental Sciences 2017年第8期29卷 191-207页

作者： chelsea Kolb Royce A.Francis Jeanne M.VanBriesen Department of Ciuil and Environmental Engineering Carnegie Mellon Uniuersity Pittsburgh PA 15213 USA Department of Engineering Management and Systems Engineering The George Washington University Washington DC 20052 USA Department of Engineering and Public Policy Carnegie Mellon University Pittsburgh PA 15213 USA

Natural and anthropogenic factors can alter bromide concentrations in drinking water sources. Increasing source water bromide concentrations increases the formation and alters the speciation of disinfection byproducts（DBPs） formed during drinking water *** DBPs are more toxic than their chlorinated analogs, and thus have a greater impact on human health. However, DBPs are regulated based on the mass sum of DBPs within a given class（e.g., trihalomethanes and haloacetic acids）, not based on species-specific risk or extent of bromine incorporation. The regulated surrogate measures are intended to protect against not only the species they directly represent, but also against unregulated DBPs that are not routinely measured. Surrogates that do not incorporate effects of increasing bromide may not adequately capture human health risk associated with drinking water when source water bromide is elevated. The present study analyzes trihalomethanes（THMs）, measured as TTHM,with varying source water bromide concentrations, and assesses its correlation with brominated THM, TTHM risk and species-specific THM concentrations and associated *** potential surrogates are evaluated to assess their ability to capture THM risk under different source water bromide concentration conditions. The results of the present study indicate that TTHM does not adequately capture risk of the regulated species when source water bromide concentrations are elevated, and thus would also likely be an inadequate surrogate for many unregulated brominated species. Alternative surrogate measures,including THM3 and the bromodichloromethane concentration, are more robust surrogates for species-specific THM risk at varying source water bromide concentrations.

关键词： Disinfection byproducts Bromide Disinfection byproduct regulation Trihalomethanes Disinfection byproduct risk

Lipocoacervate,a tunable vesicle for protein delivery

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Nano Research 2024年第10期17卷 9135-9140页

作者： Chia-Wei Yeh Nathaniel Wright chelsea Loh Nabeen Chu Yadong Wang Nancy E.and Peter C.Meinig School of Biomedical Engineering Cornell UniversityKimball Hall 290Ithaca 14853USA Human Biology Healthand Society.College of Human EcologyCornell UniversityIthaca 14853USA

Controlled delivery of proteins and other biologics is a growing medium of therapy for diseases previously *** we report a self-assembling,tunable vesicle for the controlled delivery of growth factors and *** made of heparin and a biocompatible polycation,PEAD,forms the core of the vesicle;lipids form the membrane of the *** call this vesicle lipocoacervate(LipCo),which has a high affinity for growth factors and cytokines due to *** is a tunable protein delivery *** vesicle size is controlled through polymer and salt *** functionalization enables potential for targeting capabilities with long-term storage through ***,the controlled delivery of therapeutics also avoids high toxicity to treated cells in *** we report on these key principles of LipCo assembly and design.

关键词： complex coacervate drug delivery protein delivery heparin lipid particle

Material Alteration and Meaning in Mixed Media Art ——Historical and Contemporary Practices

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Material Alteration and Meaning in Mixed Media Art ——Histo...

作者： chelsea Sandusky 中国美术学院

学位级别：硕士

本文的目的是突出艺术材料的转化属性,并探讨混合媒介、极简主义和材料艺术之间的联系。通过对极简主义艺术家伊娃·黑塞的案例研究,探讨非常规的工业材料和商业材料在当代艺术创作中的应用。材料艺术始于中国以外的地方,本文首先将伊... 详细信息

本文的目的是突出艺术材料的转化属性,并探讨混合媒介、极简主义和材料艺术之间的联系。通过对极简主义艺术家伊娃·黑塞的案例研究,探讨非常规的工业材料和商业材料在当代艺术创作中的应用。材料艺术始于中国以外的地方,本文首先将伊娃·黑塞在工作期间的创作过程与20世纪80年代中国的材料艺术概念联系起来。其次,本文将伊娃·黑塞对非传统材料的结合、使用及近三十年来中国艺术家的相关实践和观念进行比较。本文还将考察龚月斌、何湘玉、顾德新、黄永砯等艺术家的创作过程,并将他们与其他艺术家及美国当代艺术观念进行关联。总之,本文试图通过启发新兴艺术家探索材料并与本文提到的材料艺术家进行联系的方式,来填补对作为一种创作理念的材料艺术的研究空白。

关键词：材料艺术混合媒体极简主义材料改变和转变贫困艺术装置艺术雕塑当代艺

Homeward bound:canopy cover and species identity influence non-breeding season homing success and speed in forest birds

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Avian Research 2021年第2期12卷 173-180页

作者： Jin Bai chelsea A.Weitekamp Kelly Frye Kathryn E.Sieving Wildlife Ecology and Conservation University of FloridaGainesvilleFLUSA Forest Resources and Conservation University of FloridaGainesvilleFLUSA

Background:Efficient and safe movement is fundamental for wild birds to thrive in their *** arboreal forest animals,especially birds,canopy cover has a large impact on birds’daily movements and is a crucial component of conservation strategies seeking to retain avian population in disturbed or urban ***:We translocated woodland bird species utilizing different forest strata during two non-breeding seasons in Gainesville,FL,*** used linear model and generalized linear model to examine the effects of canopy cover and species identity on homing success and ***:Among our study species of Tufted Titmouse(Baeolophus bicolor),Carolina Chickadee(Poecile carolinensis),and Northern Cardinal(Cardinalis cardinalis),we found that Carolina Chickadees and Tufted Titmice were more likely to return than Northern *** birds that successfully returned,homing speed is significantly affected by forest canopy cover and species identity(titmice had higher homing speed than cardinals).Birds return much faster in landscape with higher canopy ***:This study presented evidence of species identity’s effect on homing success and speed in common feeder bird species in Southeast US and provided further evidence that bird movements in the suburban land cover are constrained by low canopy cover.

关键词： Forest bird movement Forest canopy cover Homing behaviour Non-breeding season Site fidelity

Jellyfish-inspired alginate composite hydrogel filter prepared by macro-micro double bionic strategy for efficient water purification

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Frontiers of Environmental Science & Engineering 2024年第4期18卷 141-157页

作者： Huiting Peng Yan Chen Jiaopan Lin chelsea Benally Mohamed Gamal El-Din Junkai Gao School of Naval Architecture and Marinetime Zhejiang Ocean UniversityZhoushan 316022China Department of Civil and Environmental Engineering University of AlbertaEdmontonAB T6G 1H9Canada

Recently,research on hydrogel materials with a porous structure and superior water absorption capabilities significantly ***,the hydrogel under gravity-driven separation conditions often exhibit an unstable pore structure,poor mechanical properties,and limited *** this end,this work presents a novel approach that combines a macro-micro double bionic strategy with a triple crosslinking method to develop a multifunctional alginate composite hydrogel filter(2%-SA-κCG-PVA-Ca^(2+),2%-SKP-Ca^(2+)for short)with a stable pore structure and superior mechanical properties,which possessed an umbrella-shaped structure resembling that of *** 2%-SKPCa^(2+)filter was synthesized using polyvinyl alcohol(PVA)as a stable structure-directing agent,and sodium alginate(SA)andκ-carrageenan(κ-CG)as polymer *** distinctive umbrellashaped hydrogel of 2%-SKP-Ca^(2+)filter,formed through the triple crosslinking method,overcomes the limitations of unstable pore structure and poor durability seen in hydrogels prepared by traditional crosslinking ***,the utilization of the 2%-SKP-Ca^(2+)filter in water treatment demonstrates its good selective permeability,excellent resistance to fouling,and extended longevity,which enables it to simultaneously achieve the multifunctional water purification and the coating of multi-substrate anti-fouling ***,not only does this research provide an efficient,multifunctional,highly pollution-resistant preparation method for designing a new filter,but it also confirms the application prospect of the macro-micro dual bionic strategy developed in this study in complex water treatment.

关键词： Triple crosslinking method Alginate Umbrella-shaped Jellyfish Water purification

The role and potential of attapulgite in catalytic pyrolysis of refinery waste activated sludge

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Petroleum Science 2022年第1期19卷 354-362页

作者： Qinghong Wang Kanghong Hao chelsea Benally Yue Kou Zhexuan An Mohamed Gamal El-Din Chunmao Chen State Key Laboratory of Heavy Oil Processing Beijing Key Laboratory of Oil and Gas Pollution ControlChina University of Petroleum-BeijingBeijing102249China Department of Civil and Environmental Engineering University of AlbertaEdmontonAlbertaT6G 1H9Canada

Pyrolysis is a promising technology for the treatment of refinery waste activated sludge(rWAS).In this study,attapulgite as a natural clay was used to enhance the pyrolysis of *** yields,characteristics of pyrolytic products,pyrolytic kinetics and mechanisms were *** attapulgite improved the conversion of rWAS into non-condensable gases and pyrolytic *** bio-oil quality improved and the biochar yield *** average activation energy of Stage Ⅰ(230-400℃)and Stage Ⅱ(400-500℃)decreased by 36.5%and 49.7%,respectively,compared to rWAS ***_(2)O_(3)and Fe_(2)O_(3)in attapulgite enhanced the dealkylation reaction and cracking of C-C *** content of the gasoline(

关键词： Catalytic pyrolysis Attapulgite Kinetics Product characteristics