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In vivo degradability and biocompatibility of a rheo-formed Mg–Zn–Sr alloy for ureteral implantation

Journal of Magnesium and Alloys 2022年第6期10卷 1631-1639页

作者： Di Tie Renguo Guan Huinan Liu Minfang Chen Sviatlana A.Ulasevich Ekaterina V.Skorb patricia Holt-Torres Xiaopeng Lu Norbert Hort Engineering Research Center of Continuous Extrusion Ministry of EducationDalian Jiaotong UniversityDalian 116028China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Department of Bioengineering University of CaliforniaRiversideCA 92521USA School of Materials Science and Engineering Tianjin University of TechnologyTianjin 300384China Infochemistry Scientific Center ITMO UniversitySt.Petersburg 192007Russia Magnesium Innovation Center-MAGIC Helmholtz Zentrum GeesthachtGeesthacht D-21502Germany

The introduction of biodegradable implant materials has significantly improved the postoperative subjective feelings of patients within the past few decades,among which magnesium alloy is widely considered a favorable choice as its appropriate biodegradability and evident antibacterial ***,we reveal a semisolid rheo-formed Mg–Zn–Sr alloy ureteral implant that displayed suitable degradability and biocompatibility in a pig *** non-dendritic microstructure was observed in the rheo-formed alloy,which led to ca.47%increase in ultimate tensile strength(from 195.0 MPa to 288.1 MPa)and more homogeneous degradation process compared with the untreated *** post-interventional inflammation or pathological changes of the test animals were observed during the implantation period,and the corrosion rate(0.22±0.04 mm·y^(-1))perfectly fitted the clinical ureteral stent indwelling *** urine bacteria numbers decreased from 88±13 CFU·mL^(-1)at 7 weeks post operation to 59±8 CFU·mL^(-1)at 14 weeks post operation,which confirmed the evident antibacterial activity of the *** study demonstrates that the Mg–Zn–Sr alloy is clinically safe for urinary system,enabling its efficacious use as ureteral implant materials.

关键词： In vivo Biodegradability Biocompatibility Mg–Zn–Sr alloy Ureteral implant

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Host-parasite interactions in perpetual darkness:Macroparasite diversity in the cavefish Astyanax mexicanus

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Zoological Research 2023年第4期44卷 782-792页

作者： Ana Santacruz David Hernández-Mena Ramses Miranda-Gamboa Gerardo Pérez-Ponce De León Claudia patricia Ornelas-García Departamento de Zoología Instituto de BiologíaUniversidad Nacional Autónoma de MéxicoMéxico City CP 04510México Departamento de Sistemas y Procesos Naturales Escuela Nacional de Estudios Superiores Unidad MéridaUcúYucatán CP 97357México Instituto de Energías Renovables Universidad Nacional Autónoma de MéxicoTemixcoMorelos CP 62580México Colección Nacional de Peces Departamento de ZoologíaInstituto de BiologíaUniversidad Nacional Autónoma de MéxicoMéxico City CP 04510México Stowers Institute for Medical Research Kansas CityMO 64110USA

Astyanax mexicanus has repeatedly colonized cave environments,displaying evolutionary parallelisms in many troglobitic *** being a model system for the study of adaptation to life in perpetual darkness,the parasites that infect cavefish are practically *** this study,we investigated the macroparasite communities in 18 cavefish populations from independent lineages and compared them with the parasite diversity found in their sister surface fish populations,with the aim of better understanding the role that parasites play in the colonization of new *** the cavefish populations,we identified 13 parasite taxa,including a subset of 10 of the 27 parasite taxa known for the surface *** infecting the cavefish belong to five taxonomic groups,including trematodes,monogeneans,nematodes,copepods,and *** are the most dominant group,found in 14 *** macroparasites include species with direct life cycles and trophic transmission,including invasive ***,paired comparisons indicate higher parasite richness in the cavefish than in the surface *** variation in parasite composition across the caves suggests historical and geographical contingencies in the host-parasite colonization process and potential evolution of local *** base-line data on parasite diversity in cavefish populations of *** provides a foundation to explore the role of divergent parasite infections under contrasting ecological pressures(cave *** environments)in the evolution of cave adaptive traits.

关键词： Adaptation Metazoan parasites Niche change Parasite assemblage Prevalence

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Dependence of Upper Atmosphere Photochemistry on the Shape of the Diurnal Cycle of the Photolysis Rates

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Advances in Atmospheric Sciences 2006年第2期23卷 207-214页

作者： Sonia MONTECINOS patricia BARRIENTOS Center of Advanced Studies in Arid Zones (CEAZA) University of La Serena La SerenaChile Department of Physics University of La Frontera TemucoChile

A photochemical model of the atmosphere constitutes a non-linear, non-autonomous dynamical system, enforced by the Earth＇s rotation. Some studies have shown that the region of the mesopause tends towards non-linear responses such as period-doubling cascades and chaos. In these studies, simple approximations for the diurnal variations of the photolysis rates are assumed. The goal of this article is to investigate what happens if the more realistic, calculated photolysis rates are introduced. It is found that, if the usual approximations-sinusoidal and step fiunctions—are assumed, the responses of the system axe similar： it converges to a 2-day periodic solution. If the more realistic, calculated diurnal cycle is introduced, a new 4-day subharmonic appear.

关键词： photochemical models bifurcation theory numerical solutions dynamical systems

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Pulmonary complications of portal hypertension:The overlooked decompensation

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World Journal of Clinical Cases 2022年第17期10卷 5531-5540页

作者： Rares Craciun Tudor Mocan Bogdan Procopet Andrada Nemes Cristian Tefas Mihaela Sparchez Lavinia-patricia Mocan Zeno Sparchez 3^(rd)Medical Clinic Department of Internal Medicine"Iuliu Hatieganu"University of Medicine and PharmacyCluj-Napoca 400162Romania Gastroenterology Clinic "Prof.Dr.O.Fodor"Regional Institute of Gastroenterology and HepatologyCluj-Napoca 400162Romania Intensiv Care Unit I Cluj County Emergency HosptialCluj-Napoca 400006Romania 2^(nd)Paediatric Clinic "Iuliu Hatieganu"University of Medicine and PharmacyCluj-Napoca 400126Please enter the state or provinceRomania Department of Histology "Iuliu Hatieganu"University of Medicine and PharmacyCluj-Napoca 400349Romania

The systemic nature of cirrhosis and portal hypertension has long been recognized,and the amount of data characterizing the interplay between each system is becoming ever so *** involvement was among the first described associated entities in cirrhosis,with reports dating back to the late nineteenth ***,it appears that throughout the years,interest in the pulmonary complications of portal hypertension has generally faded,especially in contrast to other decompensating events,as expertise in this field has primarily been concentrated in highly experienced tertiary care facilities and liver transplantation *** affecting up to 10%-15%of patients with advanced liver disease and having a proven prognostic impact,hepato-pulmonary syndrome,porto-pulmonary hypertension,and hepatic hydrothorax are frequently misdiagnosed,mistreated,or *** lack of precision might adversely impact patient care,referral to expert centers,and,ultimately,liver disease-related mortality and successful transplantation *** present minireview aims to increase awareness of the pulmonary complications of chronic liver disease by providing a brief overview of each of the three *** paper focuses on the essential theoretical aspects,addressing the most critical knowledge gaps on the one hand and,on the other hand,critically discussing one key issue for each complication.

关键词： Hepato-pulmonary syndrome Porto-pulmonary hypertension Hepatic hydrothorax Cirrhosis Portal hypertension Advanced liver disease

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Land use and dingo baiting are correlated with the density of kangaroos in rangeland systems

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Integrative Zoology 2023年第2期18卷 299-315页

作者： Stuart J.DAWSON Tracey L.KREPLINS Malcolm S.KENNEDY Juanita RENWICK Mark A.COWAN patricia A.FLEMING Terrestrial Ecosystem Science and Sustainability Harry Butler InstituteMurdoch UniversityMurdochAustralia Department of Primary Industries and Regional Development(present address) South PerthAustralia Department of Primary Industries and Regional Development NorthamAustralia Queensland Department of Environment and Science Australia Queensland Department of Environment and Science MoggillAustralia Department of Biodiversity Conservation and AttractionsWoodvaleAustralia

Rangelands worldwide have been subject to broadscale modiﬁcation,such as widespread predator control,intro-duction of permanent livestock water and altered vegetation to improve *** Australia,these landscape changes have resulted in kangaroos(*** macropods)populations increasing over the past 200 ***-garoos are a key contributor to total grazing pressure and in conjunction with livestock and feral herbivores have been linked to land *** used 22 years of aerial survey data to investigate whether the density of 3 macropod species in the southern rangelands of Western Australia was associated with:(i)land use,including type of livestock,total livestock,density of feral goats,type of land tenure,and kangaroo commercial harvest effort;(ii)predator management,including permitted dingo control effort,estimated dingo abundance,and presence of the State Barrier Fence(a dingo exclusion fence);and(iii)environmental variables:ruggedness,rainfall,fractional cover,and total standing dry *** kangaroos(Osphranter rufus)were most abundant inﬂat,open vegetation,on pastoral land,where area permitted for dingo control was high,and numbers were positively associated with antecedent rainfall with a 12-month *** grey kangaroos(Macropus fuliginosus)were most abundant onﬂat,agricultural land,but less abundant in areas with high permitted dingo ***(Osphranter robustus)were most abundant in rugged pastoral land with open vegetation,where permitted dingo control was *** environmental variables are key drivers of landscape productivity and kangaroo populations,anthropogenic factors such as land use and permitted dingo control are strongly associated with kangaroo abundance.

关键词： herbivores livestock macropods overgrazing rangelands total grazing pressure

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Philippine retinoblastoma initiative multi-eye center study 2010-2020

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International Journal of Ophthalmology(English edition) 2024年第1期17卷 144-156页

作者： Roland Joseph D.Tan Gary John V.Mercado patricia E.Cabrera Paulita Pamela P.Astudillo Rolando Enrique D.Domingo Josept Mari S.Poblete Charmaine Grace M.Cabebe Adriel Vincent R.Te Melissa Anne S.Gonzales Jocelyn G.Sy Beltran Alexis A.Aclan Jayson T.So Fatima G.Regala Kimberley Amanda K.Comia Josemaria M.Castro Mara Augustine S.Galang Aldous Dominic C.Cabanlas Benedicto Juan E.Aguilar Gabrielle S.Evangelista Jo Michael Maniwan Andrei P.Martin Calvin Y.Martinez John Alfred H.Lim Rena Ivy Bascuna Rachel M.Ng Kevin B.Agsaoay Kris Zanna A.Acluba-Arao Ellaine Rose V.Apostol Beatriz M.Prieto Department of Ophthalmology and Visual Sciences Philippine General HospitalManila 1000Philippines Department of Ophthalmology Baguio General Hospital and Medical CenterBaguio City 2600Philippines Department of Ophthalmology Manila Doctors HospitalManila 1000Philippines Department of Ophthalmology Rizal Medical CenterPasig City 1600Philippines Department of Ophthalmology Jose B.Lingad Memorial Regional HospitalPampanga 2000Philippines Department of Ophthalmology Southern Philippines Medical CenterDavao City 8000Philippines Department of Ophthalmology East Avenue Medical CenterQuezon City 1100Philippines Department of Ophthalmology Northern Mindanao Medical CenterCagayan de Oro City 9000Philippines Department of Ophthalmology Cebu Velez General HospitalCebu City 6000Philippines Legazpi Eye Center Legazpi City 4500Philippines Department of Ophthalmology Cagayan Valley Medical CenterTuguegarao City 3500Philippines

AIM:To provide a comprehensive and more representative national data on the disease,especially on treatment options and outcomes,and to determine access of retinoblastoma patients from Luzon,Visayas and Mindanao to eye care,and determine if access is associated with delay in consultation,staging and ***:Cohort study of retinoblastoma patients seen in eleven institutions located in the three major areas of the Philippines namely Luzon,Vizayas and Mindanao from ***:Totally 636 patients,involving 821 eyes,were ***(57%)were from Luzon and were seen in institutions in Luzon(72%).Annually,58±10 new cases were seen with 71%having unilateral *** delay of consultation remained long at 9(3,17)mo,longest in patients with unilateral disease(P<0.02)and those from the Visayas(P<0.003).Based on the International Retinoblastoma Staging System,only 35%of patients had Stage 1 while 47%already had extraocular *** was the most common treatment received by 484 patients while intravenous chemotherapy was received by *** were 250(39%)patients alive,195(31%)dead,85(13%)abandoned,17(3%)refused and 89(14%)with no ***:This study presents the largest cohort of retinoblastoma patients in the Philippines in terms of patients’and participating institutions’number and geographical location and type of institution(private and public).It also presents more comprehensive data on the treatments used and outcomes(survival,globe salvage,and vision retention rates).Delay in consultation was still long among patients leading to advanced disease stage and lower survival *** increasing capacity to diagnose and manage retinoblastoma in the country,the delay of consultation remains long primarily due to accessibility issues to eye care institutions especially in the Visayas and financial *** delay was still significant that overall survival rate remain low.

关键词： retinoblastoma Philippines clinical profile

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Financial Accounting Robert Libby, patricia A. Libby & Daniel G. Short 4th ed.

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2004年

作者： Robert Libby patricia A. Libby & Daniel G. Short

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The use of carbon nanomaterials in membrane distillation membranes:a review

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Frontiers of Chemical Science and Engineering 2021年第4期15卷 755-774页

作者： Sebastian Leaper Ahmed Abdel-Karim patricia Gorgojo Department of Chemical Engineering and Analytical Science School of EngineeringThe University of ManchesterManchesterM139PLUK Water Pollution Research Department National Research CentreGiza 12622Egypt

Membrane distillation(MD)is a thermal-based separation technique with the potential to treat a wide range of water types for various applications and *** challenges remain however,which prevent it from becoming commercially widespread including moderate permeate flux,decline in separation performance over time due to pore wetting and high thermal energy ***,its attractive characteristics such as high rejection(ca.100%)of nonvolatile species,its ability to treat highly saline solutions under low operating pressures(typically atmospheric)as well as its ability to operate at low temperatures,enabling waste-heat integration,continue to drive research interests *** particular interest is the class of carbon-based nanomaterials which includes graphene and carbon nanotubes,whose wide range of properties have been exploited in an attempt to overcome the technical challenges that MD *** low dimensional materials exhibit properties such as high specific surface area,high strength,tuneable hydrophobicity,enhanced vapour transport,high thermal and electrical conductivity and *** use in MD has resulted in improved membrane performance characteristics like increased permeability and reduced fouling *** have also enabled novel membrane capabilities such as in-situ fouling detection and localised heat *** this review we provide a brief introduction to MD and describe key membrane characteristics and fabrication *** then give an account of the various uses of carbon nanomaterials for MD applications,focussing on polymeric membrane *** research directions based on the findings are also suggested.

关键词： carbon nanomaterials graphene membrane distillation desalination carbon nanotubes

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Keeping an ear out:size relationship of the tympanic bullae and pinnae in bandicoots and bilbies(Marsupialia:Peramelemorphia)

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Current Zoology 2022年第3期68卷 251-264页

作者： Melissa C.TAYLOR Kenny J.TRAVOUILLON Margaret E.ANDREW patricia A.FLEMING Natalie M.WARBURTON Terrestrial Ecosystem Science and Sustainability Harry Butler InstituteMurdoch University90 South StMurdochWA 6150Australia Collections and Research Western Australian MuseumWelshpoolWA 6106Australia

Bandicoots and bilbies(Order Peramelemorphia)occupy a broad range of habitats across Australia and New Guinea,from open,arid deserts to dense *** once diverse group has been particularly vulnerable to habitat loss and introduced eutherian predators,and numerous species extinctions and range retractions have *** reasons for this loss requires greater understanding of their *** of the pinnae and tympanic bullae varies markedly among *** hearing is important for both predator avoidance and prey location,the variability in ear morphology could reflect specialization and adaptation to specific environments,and therefore be of conservation *** measured 798 museum specimens representing 29 species of *** for phylogenetic relatedness and head length,pinna surface area was weakly negatively correlated with average precipitation(rainfall being our surrogate measure of vegetation productivity/complexity),and there were no environmental correlates with effective diameter(pinna width).Controlling for phylogenetic relatedness and skull length,tympanic bulla volume was negatively correlated with *** that inhabited drier habitats,which would be open and allow sound to carry further with less obstruction,had relatively larger pinnae and tympanic *** contrast,species from higher rainfall habitats,where sounds would be attenuated and diffused by dense vegetation,had the smallest pinnae and bullae,suggesting that low-frequency hearing is not as important in these *** with temperature did not reach statistical *** findings highlight linkages between hearing traits and habitat that can inform conservation and management strategies for threatened species.

关键词： external ear hearing ecology marsupial middle ear sound perception

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Influence of individual tree characteristics,spatial structure and logging history on tree-related microhabitat occurrence in North American hardwood forests

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Forest Ecosystems 2021年第2期8卷 357-372页

作者： Maxence Martin patricia Raymond Yan Boucher Département des Sciences fondamentales Université du Québec à Chicoutimi555boul.de l’UniversitéChicoutimiQuébec G7H 2B1Canada Institut de la recherche sur les forêts Université du Québec en Abitibi-Témiscamingue445boul.de l’UniversitéRouyn-NorandaQuébec J9X 5E4Canada Centre d'étude de la forêt Université du Québec à MontréalP.O.Box 8888Centre-ville StationMontréalQuébec H3C 3P8Canada Direction de la recherche forestière Ministère des Forêtsde la Faune et des Parcs(MFFP)2700rue EinsteinQuébecQuébec G1P 3W8Canada

Background:Tree-related microhabitats(hereafter,"TreMs")are key components of forest biodiversity but they are still poorly known in North American hardwood *** spatial patterns of living trees bearing TreMs(hereafter,"TreM-trees")also remain to be *** logging practices can lead to a loss of TreM-trees and of their associated biodiversity,it is essential to identify the factors explaining TreM occurrence to better integrate them into forest *** therefore inventoried TreMs in 40.5-ha survey strips in northern hardwood forests in Quebec,Canada,while recording the spatial location of each *** strips were located in unmanaged oldgrowth forests,and 2 were in forests managed under selection *** 4 stands were dominated by sugar maple(Acer saccharum Marsh.)and American beech(Fagus grandifolia Ehrn.).Beech bark disease,an exotic pathology,was observed in all the ***:Large diameter at breast height and low tree vigor were the main characteristics explaining the presence of TreMs at the tree ***-trees presented slight spatial aggregation *** aggregates,however,were not well-defined and were generally constituted by a large number of trees bearing few different types of *** TreM classes(broken branch or top and woodpecker lodge)also presented a spatial *** practices had no significant effect on TreM *** bark disease increased the frequency of senescent *** impact of this pathology on TreMs was however mitigated by the small size of infected trees and probably by the short time elapsed since its ***:The factors explaining the presence and abundance of TreMs on trees has so far been little studied in North American hardwood *** results highlight that TreM-tree characteristics in the surveyed forests are consistent with those of previous studies conducted in other forest types and regions(e.g.,Europe or Northwestern America).To our knowledge,th

关键词： Habitat trees Wildlife habitat Northern hardwoods Old-growth forest Selection cutting Ecosystembased management Biodiversity indicators Conservation Forest management

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