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Cs_(3)Bi_(2)l_(9)-hydroxyapatite composite waste forms for cesium and iodine immobilization

Journal of Advanced Ceramics 2022年第5期11卷 712-728页

作者： Kun YANG Yachun WANG Junhua SHEN spencer m.scott Brian J.RILEY John D.VIENNA Jie LIAN Department of mechanical Aerospaceand Nuclear EngineeringRensselaer Polytechnic InstituteTroyUSA Department of materials Science&Engineering Rensselaer Polytechnic InstituteTroyUSA Savannah River National Laboratory AikenUSA Pacific Northwest National Laboratory RichlandUSA

Perovskite-based ceramic composites were developed as potential waste form materials for immobilizing cesium(Cs)and iodine(I)with high waste loadings and chemical *** perovskite Cs_(3)Bi_(2)I_(9)has high Cs(22 wt%)and I(58 wt%)content,and thus can be used as a potential host phase to immobilize these critical *** this work,the perovskite Cs_(3)Bi_(2)I_(9)phase was synthesized by a cost effective solution-based approach,and was embedded into a highly durable hydroxyapatite matrix by spark plasma sintering to form dense ceramic composite waste *** chemical durabilities of the monolithic Cs_(3)Bi_(2)I_(9)and Cs_(3)Bi_(2)I_(9)-hydroxyapatite composite pellets were investigated by static and semi-dynamic leaching tests,*** and I are incongruently released from the matrix for both pure Cs_(3)Bi_(2)I_(9)and composite *** normalized Cs release rate is faster than that of I,which can be explained by the difference in the strengths between Cs-I and Bi-I bonds as well as the formation of insoluble micrometer-sized BiOI *** activation energies of elemental releases based on dissolution and diffusion-controlled mechanisms are determined with significantly higher energy barriers for dissolution from the composite versus that of the monolithic Cs_(3)Bi_(2)I_(9).The ceramic-based composite waste forms exhibit excellent chemical durabilities and waste loadings,commensurate with the state-of-the-art glass-bonded perovskite composites for I and Cs immobilization.

关键词： cesium(Cs) iodine(Ⅰ) perovskite nuclear waste hydroxyapatite

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Reinforced tissue matrix to strengthen the abdominal wall following reversal of temporary ostomies or to treat incisional hernias

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 823-832页

作者： spencer P Lake Corey R Deeken Amit K Agarwal mechanical Engineering&materials Science Washington University in St.LouisSt.LouisMO 63130United States Covalent Bio LLCSt.LouisMO 63025United States Department of Surgery McGovern Medical School at UTHealthHoustonTX 77026United States

BACKGROUND Abdominal wall deficiencies or weakness are a common complication of tem-porary ostomies,and incisional hernias frequently develop after colostomy or ileostomy *** use of synthetic meshes to reinforce the abdominal wall has reduced hernia *** meshes have also been used to enhance healing,particularly in contaminated *** tissue matrices(R-Tms),which include a biologic scaffold of native extracellular matrix and a syn-thetic component for added strength/durability,are designed to take advantage of aspects of both synthetic and biologic *** date,RTms have not been reported to reinforce the abdominal wall following stoma *** Twenty-eight patients were selected with a parastomal and/or incisional hernia who had received a temporary ileostomy or colostomy for fecal diversion after rectal cancer treatment or *** hernia repair and proximal stoma closure,RTm(OviTex®1S permanent or OviTex®LPR)was placed to reinforce the abdominal wall using a laparoscopic,robotic,or open surgical ***-operative follow-up was performed at 1 month and 1 *** recurrence was determined by physical examination and,when necessary,via computed tomo-graphy *** endpoints included length of hospital stay,time to return to work,and hospital *** complications of the wound/repair site included presence of surgical site infection,seroma,hematoma,wound dehiscence,or fistula *** The observational study cohort included 16 male and 12 female patients with average age of 58.5 years±16.3 years and average body mass index of 26.2 kg/m^(2)±4.1 kg/m^(2).Patients presented with a parastomal hernia(75.0%),in-cisional hernia(14.3%),or combined parastomal/incisional hernia(10.7%).Using a laparoscopic(53.6%),robotic(35.7%),or open(10.7%)technique,RTms(OviTex®LPR:82.1%,OviTex®1S:17.9%)were placed using sublay(82.1%)or intraperitoneal onlay(IPOm;17.9%)mesh *** 1-mo

关键词： Reinforced tissue matrix Reinforced forestomach matrix Ileostomy Colostomy Ostomy takedown Incisional hernia Abdominal wall

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Optical measurements of dissolved organic matter as proxies for COD_(mn)and BOD_(5)in plateau lakes

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Environmental Science and Ecotechnology 2024年第3期19卷 132-138页

作者： Xuan Yang Yongqiang Zhou Xiaoying Yang Yunlin Zhang Robert G.m.spencer Justin D.Brookes Erik Jeppesen Hucai Zhang Qichao Zhou Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental SciencesYunnan UniversityKunming650500China Institute of International River and Eco-security Yunnan UniversityKunming650500China Zhejiang College of Security Technology Wenzhou325016China Taihu Laboratory for Lake Ecosystem Research State Key Laboratory of Lake Science and EnvironmentNanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing210008China Department of Earth Ocean and Atmospheric ScienceFlorida State UniversityTallahassee32306United States Water Research Centre School of Biological ScienceThe University of AdelaideAdelaide5005Australia Department of Ecoscience Aarhus UniversityAarhus8000Denmark Sino-Danish Centre for Education and Research Chinese Academy of SciencesBeijing100101China Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and ImplementationMiddle East Technical UniversityAnkara06800Turkey Institute of marine Sciences Middle East Technical UniversityErdemliMersin33731Turkey Yunnan Key Laboratory of Pollution Process and management of Plateau Lake-Watershed Yunnan Research Academy of Eco-environmental SciencesKunming650034China

The presence of organic matter in lakes profoundly impacts drinking water supplies,yet treatment processes involving coagulants and disinfectants can yield carcinogenic disinfection *** assessments of organic matter,such as chemical oxygen demand(COD_(mn))and biochemical oxygen demand(BOD_(5)),are often ***,optical measurements of dissolved organic matter(DOm)offer a rapid and reliable means of obtaining organic matter composition *** we employed DOm optical measurements in conjunction with parallel factor analysis to scrutinize COD_(mn)and BOD_(5)*** was performed using an independent dataset encompassing six lakes on the Yungui Plateau from 2014 to 2016(n=256).Leveraging multiple linear regressions(mLRs)applied to DOm absorbance at 254 nm(a254)and fluorescence components C1-C5,we successfully traced COD_(mn)and BOD_(5)variations across the entire plateau(68 lakes,n=271,R^(2)>0.8,Pm optical indices yielded superior estimates(higher R^(2))of COD_(mn)and BOD_(5)during the rainy season compared to the dry season and demonstrated increased accuracy(R^(2)>0.9)in mesotrophic lakes compared to oligotrophic and eutrophic *** study underscores the utility of mLR-based DOm indices for inferring COD_(mn)and BOD_(5)variability in plateau lakes and highlights the potential of integrating in situ and remote sensing platforms for water pollution early warning.

关键词： Dissolved organic matter Chemical oxygen demand Biochemical oxygen demand Water quality Yungui plateau lakes

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Construction of a broad-host-range Anderson promoter series and particulate methane monooxygenase promoter variants expand the methanotroph genetic toolbox

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Synthetic and Systems Biotechnology 2024年第2期9卷 250-258页

作者： Etash H.Bhat Jessica m.Henard spencer A.Lee Dustin mcHalffey mahith S.Ravulapati Elle V.Rogers Logan Yu David Skiles Calvin A.Henard Department of Biological Sciences and BioDiscovery Institute University of North TexasDentonTXUSA

methanotrophic bacteria are currently used industrially for the bioconversion of methane-rich natural gas and anaerobic digestion-derived biogas to valuable *** bacteria may also serve to mitigate the negative effects of climate change by capturing atmospheric greenhouse *** genetic tools have previously been developed for genetic and metabolic engineering of ***,the available tools for use in methanotrophs are significantly underdeveloped compared to many other industrially relevant bacteria,which hinders genetic and metabolic engineering of these *** such,expansion of the methanotroph genetic toolbox is needed to further our understanding of methanotrophy and develop biotechnologies that leverage these unique microbes for mitigation and conversion of methane to valuable ***,we determined the copy number of three broad-host-range plasmids in methylococcus capsulatus Bath and methylosinus trichosporium OB3b,representing phylogenetically diverse Gammaproteobacterial and Alphaproteobacterial methanotrophs,***,we show that the commonly used synthetic Anderson series promoters are functional and exhibit similar relative activity in *** and *** OB3b,but the synthetic series had limited ***,we mutagenized the native *** particulate methane monooxygenase promoter and identified variants with activity that expand the activity range of synthetic,constitutive promoters functional not only in ***,but also in Escherichia ***,the tools developed here advance the methanotroph genetic engineering toolbox and represent additional synthetic genetic parts that may have broad applicability in Pseudomonadota bacteria.

关键词： methanotroph methane monooxygenase Promoter metabolic engineering Synthetic biology

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Importance of periphytic biofilms for carbon cycling in paddy fields:A review

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Pedosphere 2024年第1期34卷 36-43页

作者： Lei ZHOU Yonghong WU Junzhuo LIU Pengfei SUN Ying XU Jan DOLFING Robert Gmspencer Erik JEPPESEN State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Zigui Three Gorges Reservoir Ecosystem Observation and Research Station of Ministry of Water Resources of the People's Republic of ChinaYichang 443605China College of Nanjing University of Chinese Academy of SciencesNanjing 211135China Faculty of Energy and Environment Northumbria UniversityNewcastle upon Tyne NE18QHUK Department of Earth Ocean and Atmospheric ScienceFlorida State UniversityTallahassee FL 32306USA Department of Ecoscience&Centre for Water Technology(WATEC) Aarhus UniversityAarhus DK-8000Denmark Sino-Danish Centre for Education and Research Beijing 100049China Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and Implementation(EKOSAM)Middle East Technical UniversityAnkara 06800Turkiye Institute of marine Sciences Middle East Technical UniversityMersin 33731Turkiye

Paddy fields play an important role in global carbon(C) cycling and are an important source of methane(CH_(4)) emissions. Insights into the processes influencing the dynamics of soil organic C(SOC) in paddy fields are essential for maintaining global soil C stocks and mitigating climate change. Periphytic biofilms composed of microalgae, bacteria, and other microorganisms are ubiquitous in paddy fields, where they directly mediate the transfer of elements at the soil-water interface. However, their contributions to C turnover and exchange have been largely neglected. Periphytic biofilms affect and participate in soil C dynamics by altering both abiotic(e.g., pH and redox potential) and biotic conditions(e.g., microbial community composition and metabolism). This review summarizes the contributions of periphytic biofilms to soil C cycling processes, including carbon dioxide fixation, SOC mineralization, and CH_(4) emissions. Future research should be focused on: i) the mechanisms underlying periphytic biofilm-induced C fixation and turnover and ii) quantifying the contributions of periphytic biofilms to soil C uptake, stabilization, and sequestration in paddy fields.

关键词： carbon fixation carbon mineralization carbon sequestration methane emission microbial aggregates soil organic carbon

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Associations between health-related fitness and patient-reported symptoms in newly diagnosed breast cancer patients

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Journal of Sport and Health Science 2024年第6期13卷 851-862页

作者： Ki-Yong An Fernanda Z.Arthuso myriam Filion spencer J.Allen Stephanie m.Ntoukas Gordon J.Bell Jessica mcNeil Qinggang Wang margaret L.mcNeely Jeff K.Vallance Lin Yang S.Nicole Culos-Reed Leanne Dickau John R.mackey Christine m.Friedenreich Kerry S.Courneya Faculty of Kinesiology Sportand RecreationCollege of Health SciencesUniversity of AlbertaEdmonton T6G 2H9Canada Department of Kinesiology School of Health and Human SciencesUniversity of North Carolina at GreensboroGreensboroNC 27412USA Department of Cancer Epidemiology and Prevention Research Cancer Care AlbertaAlberta Health ServicesCalgary T2S 3C3Canada Faculty of Rehabilitation medicine University of AlbertaEdmonton T6G 2H9Canada Faculty of Health Disciplines Athabasca UniversityAthabasca T9S 3A3Canada Department of Oncology Cumming School of MedicineUniversity of CalgaryCalgary T2N 4N1Canada Faculty of Kinesiology University of CalgaryCalgary T2N 1N4Canada Faculty of medicine and Dentistry University of AlbertaEdmonton T6G 2H9Canada

Background:Newly diagnosed breast cancer patients experience symptoms that may affect their quality of life,treatment outcomes,and *** and managing breast cancer-related symptoms soon after diagnosis is *** purpose of this study was to investigate the associations between health-related fitness(HRF)and patient-reported symptoms in newly diagnosed breast cancer ***:This study utilized baseline data from the Alberta moving Beyond Breast Cancer Cohort Study that were collected within 90 days of *** measures included peak cardiopulmonary fitness(peak volume of oxygen consumption(VO_(2peak))),maximal muscular strength and endurance,flexibility,and body *** measures included depression,sleep quality,and *** multivariable logistic regression was performed for ***:Of 1458 participants,51.5%reported poor sleep quality,26.5%reported significant fatigue,and 10.4%reported moderate *** multivariable-adjusted models,lower relative VO_(2peak)was independently associated with a greater likelihood of all symptom measures,including moderate depression(pmptom(pmultiple symptoms(pmonstrated threshold associations with all symptom measures such that all 3 lower quartiles exhibited similar elevated risk compared to the highest *** strength of the threshold associations varied by the symptom measure with odds ratios ranging from-1.5 for poor sleep quality to-3.0 for moderate depression and multiple ***,lower relative upper body muscular endurance was also independently associated with fatigue in a dose-response manner(p=0.001),and higher body weight was independently associated with poor sleep quality in an inverted U pattern(p=0.021).Conclusion:Relative VO_(2peak)appears to be a critical HRF component associated with multiple patient-reported symptoms in newly diag

关键词： Breast cancer Fatigue Depression Sleep quality Cardiorespiratory fitness

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Corrigendum to“Optical measurements of dissolved organic matter as proxies for COD_(mn)and BOD_(5)in plateau lakes”[***.19(2024)100326]

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Environmental Science and Ecotechnology 2024年第4期20卷 140-140页

The authors regret that the following statements in the original article were wrong and have been *** authors would like to apologise for any inconvenience caused.

关键词： plateau dissolved wrong

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Real-time hybrid simulation for structural control performance assessment

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Earthquake Engineering and Engineering Vibration 2009年第4期8卷 481-492页

作者： Juan E Carrion BF spencer Jr Brian m Phillips Skidmore Owings & Merrill LLP Civil and Environmental Engineering Department University of Illinois

Real-time hybrid simulation is an attractive method to evaluate the response of structures under earthquake loads. The method is a variation of the pseudodynamic testing technique in which the experiment is executed in real time, thus allowing investigation of structural systems with rate-dependent components. Real-time hybrid simulation is challenging because it requires performance of all calculations, application of displacements, and acquisition of measured forces, within a very small increment of time. Furthermore, unless appropriate compensation for actuator dynamics is implemented, stability problems are likely to occur during the experiment. This paper presents an approach for real-time hybrid simulation in which compensation for actuator dynamics is implemented using a model-based feedforward compensator. The method is used to evaluate the response of a semi-active control of a structure employing an mR damper. Experimental results show good agreement with the predicted responses, demonstrating the effectiveness of the method for structural control performance assessment.

关键词： real-time hybrid simulation mR damper semi-active control actuator dynamics

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Development of a building information model-guided post-earthquake building inspection framework using 3D synthetic environments

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Earthquake Engineering and Engineering Vibration 2023年第2期22卷 279-307页

作者： Nathaniel m.Levine Yasutaka Narazaki Billie F.spencer Department of Civil and Environmental Engineering University of Illinois at Urbana-ChampaignUrbanaIllinois 61801USA Zhejiang University-University of Illinois at Urbana-Champaign Institute Zhejiang UniversityHaining 314400China

Computer vision-based inspection methods show promise for automating post-earthquake building *** methods survey a building with unmanned aerial vehicles and automatically detect damage in the collected ***,assessing the damage′s impact on structural safety requires localizing damage to specific building components with known design and *** paper proposes a BIm-based automated inspection framework to provide context for visual surveys.A deep learning-based semantic segmentation algorithm is trained to automatically identify damage in *** BIm automatically associates any identified damage with specific building ***,components are classified into damage states consistent with component fragility models for integration with a structural *** demonstrate the framework,methods are developed to photorealistically simulate severe structural damage in a synthetic computer graphics environment.A graphics model of a real building in Urbana,Illinois,is generated to test the framework;the model is integrated with a structural analysis to apply earthquake damage in a physically realistic manner.A simulated UAV survey is flown of the graphics model and the framework is *** method achieves high accuracy in assigning damage states to visible structural *** assignment enables integration with a performance-based earthquake assessment to classify building safety.

关键词： computer vision earthquake engineering building information model physics-based graphics model synthetic environment

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Damper placement for seismic control of super-long-span suspension bridges based on the first-order optimization method

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Science China(Technological Sciences) 2010年第7期53卷 2008-2014页

作者： Billie F spencer Department of Civil and Environmental Engineering University of Illinois at Urbana-Champaign

To ensure the anti-earthquake performances of super-long-span suspension bridges, effective devices should be employed to control the seismic response of key sections. In this paper, four kinds of assessment functions for seismic response control effect are formulated based on the mechanism of seismic response control with dampers and the seismic response characteristics of long-span suspension bridges. A new optimal placement method of dampers using penalty function and first-order optimization theory is then proposed. Runyang suspension bridge (RSB) with a main span of 1490 m is then taken as an example. After seismic response time-history analyses on RSB using different placements of dampers, the analysis results are optimized by employing the optimal placement method and the optimal placements of dampers with the four assessment functions are then achieved respectively. Comparison of the four optimal control effects show that different assessment functions can lead to different optimal placements when the number of dampers is certain, but all placements of dampers can reduce the seismic response of RSB significantly. The selection of assessment functions and damper optimal placement should be determined by the structural characteristics and by what is considered in the structures. Results also show that the first-order optimization is an effective method on determining the optimal placement of dampers.

关键词： suspension bridge seismic control damper placement control effect assessment first-order optimization method

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