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Coating powder beds with liquids and foams based on viscous formulations using a twin screw mixer:A continuous process study

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Particuology 2024年第10期93卷 364-376页

作者： Mohamed s.Manga Dimitrios Kontziampasis Mustafa Al-Maqdad sean clifford serafim Bakalis David W.York school of Chemical and Process Engineering Faculty of Engineering and Physical SciencesUniversity of LeedsLeedsLS29JTUK school of Mechanical Engineering Faculty of Engineering and Physical SciencesUniversity of LeedsLeedsLS29JTUK school of science and Engineering University of DundeeDD14HNDundeeScotlandUK Dundee International Institute of Central south University Tongzipo RoadCentral South UniversityChangshaHunan410013China Department of Chemical Engineering School of EngineeringUniversity of NewcastleNewcastleNE17RUUK school of Chemical Engineering University of BirminghamBirminghamB152TTUK Department of Chemical Engineering Faculty of EngineeringUniversity of NottinghamNG72RDUK

Coating with viscous formulations has been essential in numerous industries as it can be a means for providing functionalization, additional properties, as well as other benefits. However, there have been scarce studies that have investigated and proposed methodologies in literature. Continuous coating of powders with viscous liquids poses as a promising technology, which has been mentioned in some studies, but has not yet been thoroughly investigated. This paper employs the use of image processing and analysis, in combination with statistical analysis of particles to evaluate the effectiveness of foams and liquids as a means of coating powder beds. Two different sizes of twin screw mixers that are working in continuous operation are employed, and a new continuous foaming device is fabricated and used for the experiments of coating. The effect of materials and process parameters (as for example rotational speed, and flowrate) on the quality of coating are investigated. Image analysis is used to assess the coating quality. The results clearly showcase the potential of using twin screw mixers for coating purposes and not only for mixing. The hypothesis that using large bubble foams to improve the coating of viscous liquids on particles is proven correct, as they provide higher quality coatings compared to their equivalent liquids, when used in the twin screw mixer. surprisingly, using a larger scale twin screw mixer, does not show a substantial effect on the mixing, regarding quality, however there is still a requirement for mix optimization for achieving scale-up of this process. These results provide a new pathway for coating powders with viscous formulations in industrial applications, requiring less energy and effort in this process, and can pave the way towards introducing more sustainable industrial methodologies for coating.

关键词： Powder coating Continuous processing Viscous liquid Foam Image analysis Positron emission particle traking(PEPT)

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The Fentanyl Crisis and ***

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Beijing Review 2024年第5期67卷 22-23页

作者： clifford A.Kiracofe The Washington InstituteforPeaceand Development.

During their summit in san Francisco,California,on November 15,2023,Chinese President Xi Jinping and *** Joe Biden announced continued cooperation on counternarcotics issues,and a crackdown on fentanyl in *** on a wid... 详细信息

关键词： U.s. continued fentanyl

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THE sUMMIT OF U.s.,JAPAN AND PHILIPPINEs:A sTEP CLOsER TO NEW COLD WAR

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China Report AsEAN 2024年第5期9卷 60-61页

作者： clifford A.Kiracofe the Washington Institute for Peace the Us senate Committee on Foreign Relations

The leaders’summit of the United states,Japan,and the Philippines held in Washington,*** billed as“historic.”Manila will join the Washington-led new arrangements targeted at China.

关键词： arrangement Washington China

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Geochemical fingerprints and hydrocarbon potential of Paleocene mudrocks in the Tano Basin, Ghana: insights from biomarkers and stable carbon isotopes

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Acta Geochimica 2024年第2期43卷 255-279页

作者： Kojo Amoako Nancy Pearl Osei-Boakye Ningning Zhong N’Guessan Francois De sales Konan Gordon Foli Prince Opoku Appau clifford Fenyi Ebenezer Apesegah Research Group for Marine Geochemistry(ICBM-MPI Bridging Group) Institute for Chemistry and Biology of the Marine Environment(ICBM)Carl von Ossietzky University OldenburgAmmerlander Heerstr.26129 OldenburgGermany state Key Laboratory of Petroleum Resources and Prospecting College of GeosciencesChina University of PetroleumBeijing 102249China Department of Geological Engineering Faculty of Civil and Geo-EngineeringKwame Nkrumah University of Science and TechnologyKumasiGhana Ghana National Gas Company 225 Osibisa CloseAirport WestAccraGhana Petroleum Corporation GNPCPMBPetroleum HouseTemaGhana

The Paleocene mudrocks in Ghana’s Tano Basin have received limited attention despite ongoing efforts to explore hydrocarbon resources.A thorough geochemical analysis is imperative to assess these mudrocks’petroleum generation potential and formulate effective exploration *** this study,a comprehensive geochemical analysis was carried out on ten Paleocene rock cuttings extracted from TP-1,a discovery well within the Tano *** analytical techniques,including total organic carbon(TOC)analysis,Rock–Eval pyrolysis,gas chromatography-mass spectrometry,and isotope ratio-mass spectrometry,were employed to elucidate their hydrocar-bon potential and organic ***ﬁndings in this study were subsequently compared to existing geochemical data on Paleocene source rocks in the south Atlantic marginal *** results indicated that the Paleocene samples have TOC content ranging from 0.68 to 2.93 wt%.The prevalent kerogen types identiﬁed in these samples were Type Ⅱ and Type Ⅲ.Molecular and isotope data suggest that the organic matter found in the Paleocene mudrocks can be traced back to land plants and lower aquatic *** mudrocks were deposited in a transi-tional environment withﬂuctuating water salinity,charac-terized by sub-oxic redox *** indices,both bulk and molecular,indicated a spectrum of maturity levels within the Paleocene mudrocks,spanning from immature to marginally mature,with increasing maturity observed with greater *** comparison,the organic composition and depositional environments of Paleocene source rocks in the Tano Basin closely resemble those found in the Niger Delta Basin,Douala,and Kribi-Campo Basins,the Kwanza Formation in Angola,and certain Brazilian marginal ***,it is worth noting that Paleocene source rocks in some of the basins,such as the Niger Delta and Brazilian marginal basins,exhibit rela-tively higher thermal maturity levels compared to those observed in the current Paleocene samp

关键词： Paleocene source rocks source input Depositional environment Thermal maturity Hydrocarbon potential Tano Basin West Africa

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Nurses’perceptions about neonatal intensive care units providing family-centered care are associated with skin-to-skin contact implementation

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Pediatric Investigation 2024年第1期8卷 61-65页

作者： Marilyn Aita Gwenaëlle De clifford-Faugère Geneviève Laporte sébastien Colson Nancy Feeley Faculty of Nursing Universitéde MontréalMontrealCanada CHU sainte-Justine Research Centre MontrealCanada Quebec Network on Nursing Intervention Research MontrealCanada Faculty of Medical and Paramedical sciences CEReSSAix-Marseille UniversitéMarseilleFrance Ingram school of Nursing McGill UniversityMontrealCanada Centre for Nursing Research and Lady Davis Institute Jewish General HospitalMontrealCanada

skin-to-skin contact(ssC)consists of positioning the diaper-clad infant against the parent’s chest and is considered a nursing practice rooted in family-centered care(FCC).1 ssC implies simultaneous parental presence and helps to facilitate their involvement from the earliest hours of their preterm infants’lives as this intervention is delivered by parents.1 FCC has gained worldwide popularity in recent years to promote parental presence and active participation of parents in care during neonatal intensive care units(NICUs)hospitalization.2 Both practices relate to developmental care(DC),which regroups specific interventions aimed at reducing stress and improving infant neurological development.

关键词： centered gained skin

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Comparative analysis of impact of human occupancy on indoor microbiomes

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Frontiers of Environmental science & Engineering 2021年第5期15卷 145-154页

作者： Liu Cao Lu Yang clifford s.s.anson shuai Li Qiang He Department of Civil and Environmental Engineering The University of TennesseeKnoxvilleTN37996USA Institute for a secure and sustainable Environment The University of TennesseeKnoxvilleTN37996USA

Educational facilities serve as community hubs and consequently hotspots for exposure to pathogenic ***,it is of critical importance to understand processes shaping the indoor microbiomes in educational facilities to protect public health by reducing potential exposure risks of students and the broader *** this study,the indoor surface bacterial microbiomes were characterized in two multifunctional university buildings with contrasting levels of human occupancy,of which one was recently constructed with minimal human occupancy while the other had been in full operation for six *** levels of human occupancy in the older building were shown to result in greater microbial abundance in the indoor environment and greater proportion of the indoor surface bacterial microbiomes contributed from human-associated microbiota,particularly the skin *** was further revealed that human-associated microbiota had greater influence on the indoor surface bacterial microbiomes in areas of high occupancy than areas of low *** with minimal impact from human occupancy in a new construction,the indoor microbiomes in the new building exhibited significantly lower influence from human-associated microbiota than in the older building,with microbial taxa originating from soil and plants representing the dominant constituents of the indoor surface bacterial *** contrast,microbial taxa in the older building with extensive human occupancy were represented by constituents of the human microbiota,likely from *** findings provide insights into processes shaping the indoor microbiomes which will aid the development of effective strategies to control microbial exposure risks of occupants in educational facilities.

关键词： Built environment Indoor microbiome Occupant Building sequencing

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An exploration of the relationship between recruitment communication and foraging in stingless bees

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Current Zoology 2021年第5期67卷 551-560页

作者： Robbie I’anson PRICE Francisca sEGERs Amelia BERGER Fabio s.NAsCIMENTO Christoph GRUTER Department of Ecology and Evolution University of LausanneLausanne 1015Switzerland swiss Centre for Affective sciences University of GenevaGene`ve 1201Switzerland Department for Applied Bioinformatics Institute of Cell Biology and NeuroscienceGoethe UniversityFrankfurt 60438Germany Departamento de Biologia Faculdade de FilosofiaCiencias e Letras de Ribeirao PretoUniversidade de Sao PauloRibeirao PretoSao Paulo CEP 14040-901Brazil school of Biological sciences University of Bristol24 Tyndall AvenueBristol BS81TQUK

social information is widely used in the animal kingdom and can be highly *** social insects,foragers can use social information to find food,avoid danger,or choose a new nest *** others allows individuals to obtain information without having to sample the *** foragers communicate information they will often only advertise high-quality food sources,thereby filtering out less adaptive *** bees,a large pantropical group of highly eusocial bees,face intense inter-and intra-specific competition for limited resources,yet display disparate foraging *** the same environment there are species that communicate the location of food resources to nest-mates and species that do *** current understanding of why some species communicate foraging sites while others do not is *** freely foraging colonies of several co-existing stingless bee species in Brazil,we investigated if recruitment to specific food locations is linked to 1)the sugar content of forage,2)the duration of foraging trips,and 3)the variation in activity of a colony from 1 day to another and the variation in activity in a species over a *** found that,contrary to our expectations,species with recruitment communication did not return with higher quality forage than species that do not recruit ***,foragers from recruiting species did not have shorter foraging trip durations than those from weakly recruiting *** the intense inter-and intraspecific competition for resources in these environments,it may be that recruiting species favor food resources that can be monopolized by the colony rather than food sources that offer high-quality rewards.

关键词： communication foraging social information stingless bee

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Potential distributional shifts in North America of allelopathic invasive plant species under climate change models

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Plant Diversity 2022年第1期44卷 11-19页

作者： anson Wang Anthony E.Melton Douglas Esoltis Pamela ssoltis Department of Biology University of FloridaGainesvilleFL32611USA Florida Museum of Natural History University of FloridaGainesvilleFL32611USA Genetics Institute University of FloridaGainesvilleFL32610USA Biodiversity Institute University of FloridaGainesvilleFL32611USA

Predictive studies play a crucial role in the study of biological invasions of terrestrial plants under possible climate change *** species are recognized for their ability to modify soil microbial communities and influence ecosystem ***,we focused on six species of allelopathic flowering plants-Ailanthus altissima,Casuarina equisetifolia,Centaurea stoebe ***,Dioscorea bulbifera,Lantana camara,and schinus terebinthifolia-Xhat are invasive in North America and examined their potential to spread further during projected climate *** used species Distribution Models(sDMs)to predict future suitable areas for these species in North America under several proposed future climate *** and Maxent were used to develop sDMs,estimate current distributions,and predict future areas of suitable climate for each *** with the greatest predicted suitable climate in the future include the northeastern and the coastal northwestern regions of North *** size estimations demonstrate the possibility of extreme range loss for these invasives in the southeastern United states,while new areas may become suitable in the northeastern United states and southeastern *** findings show an overall northward shift of suitable climate during the next few decades,given projected changes in temperature and *** results can be utilized to analyze potential shifts in the distribution of these invasive species and may aid in the development of conservation and management plans to target and control dissemination in areas at higher risk for potential future invasion by these allelopathic species.

关键词： Allelopathy Invasive species species distribution models Ecological niche models Invasion impacts Multi-species assessment

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重症医学循证实践

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2017年

作者： clifford s

本书是一本关于循证医学与临床实践的专著。靠前篇着重介绍循证医学的概念和方法、实践的原则和步骤，同时还介绍了循证医学产生的历史以及开展的现状和发展方向。第二篇介绍如何得到有用的证据，包括文献检索的具体方法。第三篇则从诊... 详细信息

ISBN: (纸本)9787533189075

本书是一本关于循证医学与临床实践的专著。靠前篇着重介绍循证医学的概念和方法、实践的原则和步骤，同时还介绍了循证医学产生的历史以及开展的现状和发展方向。第二篇介绍如何得到有用的证据，包括文献检索的具体方法。第三篇则从诊断、治疗、和筛查、预后、不良反应、临床经济分析、生命质量、决策分析、卫生技术和医疗质量评估以及在医学教育中应用等方面论述如何在临床实践和医学教学中开展循证医学。第四篇从疾病角度，向读者介绍各专科医生如何在临床实践中应用循证医学的原理解决临床问题的实例。

关键词：险症循证医学

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Fever of unknown origin:a retrospective review of pediatric patients from an urban,tertiary care center in Washington,DC

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World Journal of Pediatrics 2020年第2期16卷 177-184页

作者： Ann Marie szymanski Hugo clifford Tova Ronis Division of Pediatric Rheumatology Children's National Health SystemWashingtonDCUSA National Institute of Arthritis and Musculoskeletal and skin Diseases National Institutes of HealthBuilding 10Rm 12S251 MSC 156010 Center DriveBethesdaMD 20814USA The school of Medicine and Health sciences The George Washington UniversityWashingtonDCUSA

Background Fever of unknown origin(FUO)continues to challenge clinicians to determine an etiology and the need for *** study explored the most common etiologies,characteristics,and average cost of hospitalization for FUO in a pediatric population at an urban,tertiary care hospital in Washington,*** Records from patients admitted to Children's National Health system between september 2008 and April 2014 with an admission ICD-9 code for fever(780.6)were *** charts of patients 2-18 years of age with no underlying diagnosis and a temperature greater than 38.3℃for 7 days or more at time of hospitalization were *** diagnoses,features of admission,and total hospital charges were *** 110 patients qualified for this *** majority of patients(n=42,38.2%)were discharged without a *** was followed closely by infection,accounting for 37.2%(n=41)of *** disease was next(n=16,14.5%),followed by miscellaneous(n=6,5.4%)and oncologic diagnoses(n=5,4.5%).The average cost of hospitalization was 40,295 Us *** This study aligns with some of the most recent publications which report undiagnosed cases as the most common outcome in patients hospitalized with *** that,often no diagnosis is found may reassure patients,families,and *** cost associated with hospitalization for FUO may cause clinicians to reconsider inpatient admission for diagnostic work-up of fever,particularly given the evidence demonstrating that many patients are discharged without a diagnosis.

关键词： Fever Fever of unknown origin Infection Healthcare costs

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