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Hepatic ischemia-reperfusion syndrome and its effect on the cardiovascular system: The role of treprostinil, a synthetic prostacyclin analog

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世界胃肠外科杂志:英文版(电子版) 2023年第9期15卷 1858-1870页

作者： christina Mouratidou Efstathios T Pavlidis Georgios Katsanos Serafeim-Chrysovalantis Kotoulas Eleni Mouloudi Georgios Tsoulfas Ioannis N Galanis Theodoros E Pavlidis Intensive Care Unit Hippokration General HospitalThessaloniki 54642Greece 2^(nd)Propedeutic Department of Surgery Hippokration General HospitalSchool of MedicineAristotle University of ThessalonikiThessaloniki 54642Greece Department of Transplantation Hippokration General HospitalSchool of MedicineAristotle University of ThessalonikiThessaloniki 54642Greece

Hepatic ischemia-reperfusion syndrome has been the subject of intensive study and experimentation in recent decades since it is responsible for the outcome of several clinical entities,such as major hepatic resections and liver *** addition to the organ’s post reperfusion injury,this syndrome appears to play a central role in the dysfunction of distant tissues and ***,continuous research should be directed toward finding effective therapeutic options to improve the outcome and reduce the postoperative morbidity and mortality *** is a synthetic analog of prostaglandin I2,and its experimental administration has shown encouraging *** has already been approved by the Food and Drug Administration in the United States for pulmonary arterial hypertension and has been used in liver transplantation,where preliminary encouraging results showed its safety and feasibility by using continuous intravenous administration at a dose of 5 ng/kg/*** improves renal and hepatic function,diminishes hepatic oxidative stress and lipid peroxidation,reduces hepatictoll-like receptor 9 and inflammation,inhibits hepatic apoptosis and restores hepatic adenosine triphosphate(ATP)levels and ATP synthases,which is necessary for functional maintenance of *** exhibits vasodilatory properties and antiplatelet activity and regulates proinflam-matory cytokines;therefore,it can potentially minimize ischemia-reperfusion ***,it may have beneficial effects on cardiovascular parameters,and much current research interest is concentrated on this compound.

关键词： Hepatic ischemia-reperfusion syndrome Myocardial damage Prostaglandins Treprostinil Liver transplantation Hepatectomy

Habitat selection of woodchat shrikes Lanius senator during spring stopover is related to foraging strategy

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Current Zoology 2017年第2期63卷 139-149页

作者： Danai PAPAGEORGIOU Christos BARBOUTIS christina KASSARA Sinos GIOKAS Department of Biology University of Patras Panepistimioupoli Patras GR -26500 Greece Antikythira Bird Observatory Hellenic Ornithological Society Themistokleous 80 Athens GR-10681 Greece

Every spring a huge number of passerines cross the Sahara Desert and the Mediterranean Sea on their way to their breeding grounds. Stopover sites after such extended barriers where birds can rest, refuel, and find shelter from adverse weather, are of crucial importance for the outcome of their migration. Stopover habitat selection used by migrating birds depends on landscape context, habitat patch characteristics, as well as on the particular energetic conditions and needs of individual birds, but it is still poorly investigated. We focused on a long-distance migrating passerine, the woodchat shrike, in order to investigate for the first time the species’ habitat selection at a spring stopover site (island of Antikythira, Greece) after the crossing of the Sahara Desert and Mediterranean Sea. We implemented radio-tracking, color-ringing, and visual behavioral observations to collect data on microhabitat use. Generalized Linear Mixed Models were developed to identify the species’ most preferred microhabitat during its stopover on this low human disturbed island. We found that high maquis vegetation surrounded by low vegetation was chosen as perches for hunting. Moreover, high maquis vegetation appeared to facilitate hunting attempts toward the ground, the most frequently observed foraging strategy. Finally, we discuss our findings in the context of conservation practices for the woodchat shrike and their stopover sites on Mediterranean islands.

关键词： habitat selection Mediterranean ecosystem radio-tracking stopover ecology woodchat shrike Lanius senator

Identification of secondary raw materials in mold powders and their melting behavior

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Journal of Iron and Steel Research(International) 2019年第4期26卷 403-411页

作者： Irmtraud Marschall Nathalie Kolbl Harald Harmuth christina Atzenhofer KI-MET GmbH 8700 LeobenAustria Department Mineral Resources Engineering Chair of CeramicsMontanuniversitaet Leoben8700 LeobenAustria

Commercial mold powders use a limited number of main mineral constituents,but may differ significantly in chemical *** main mineral raw materials of specimens investigated here are quartz,fluorite and free carbon,as well as wollastonite and *** investigations revealed the use of secondary raw materials like blast furnace slag,fly ash,glass scrap and phosphorous slag as further *** the formation of cuspidine was one major point of interest,the influence of the silica source on its formation was identified.A replacement of wollastonite by blast furnace slag reduced the temperature of the first precipitation of cuspidine by about 100℃;the dissociation of sodium carbonate was lowered by-40℃.The lowest temperature of the first Na2CO3 dissociation could be achieved by using fluorine in combination with blast furnace *** formation from the melt is further decreased if sodium and fluorine are both *** use of glass scrap and phosphorous slag strongly reduced the temperature of first melt formation and enhanced cuspidine formation.

关键词： Mold powder Cuspidine Melting Crystallization behavior

Magneto-polaron induced intersubband optical transition in a wide band gap Ⅱ–Ⅵ semiconductor quantum dot

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Journal of Semiconductors 2015年第3期36卷 1-6页

作者： P.christina Lily Jasmine A.John Peter Department of Physics N.M.S.Sermathai Vasan College for Women Department of Physics Government Arts College

Effects of LO-phonon contribution on the electronic and the optical properties are investigated in a ***.2 Se/ZnSe quantum dot in the presence of magnetic field strength. The magneto-polaron induced hydro- genic binding energy as a function of dot radius in the wide band gap quantum dot is calculated. The oscilla- tor strength and the spontaneous lifetime are studied taking into account the spatial confinement, magnetic field strength and the phonon contribution. Numerical calculations are carried out using variational formulism within the single band effective mass approximation. The optical properties are computed with the compact density matrix method. The magneto-polaron induced optical gain as a function of photon energy is observed. The results show that the optical telecommunication wavelength in the fiber optic communications can be achieved using CdSe/ZnSe semiconductors and it can be tuned with the proper applications of external perturbations.

关键词： electronic states optical absorption intersubband transition quantum dot

Epigastric hernias in children and the use of ultrasound in its diagnosis

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World Journal of Pediatric Surgery 2023年第2期6卷 92-96页

作者： Tatjana T König Laura S Oerters Ljuba Spiller Martin Schwind Mark Born christina Oetzmann von Sochaczewski Andreas C Heydweiller Klinik und Poliklinik für Kinderchirurgie Universitätsmedizin der Johannes Gutenberg-Universität MainzMainzGermany Sektion Kinderchirurgie der Klinik und Poliklinik für Allgemein- Viszeral-Thorax-und GefächirurgieUniversität sklinikum BonnBonnGermany Sektion Kinderradiologie der Klinik für Diagnostische und Interventionelle Radiologie Universitätsklinikum BonnBonnGermany

Introduction There is a paucity of clinical data on pediatric epigastric hernias despite them accounting for up to 6%of all hernia repairs in *** aimed to provide additional data to supplement those 117 cases of a recent systematic review and to further clarify the role of ultrasound in diagnosing pediatric epigastric *** We retrospectively included all 60 patients treated for epigastric hernias in children in two tertiary pediatric surgical departments within 12 *** were tested via point-biserial correlation *** Epigastric hernias primarily affected preschool children with a median age of 39 *** vast majority of patients(88%)presented with swelling that was occasionally(30%)accompanied by *** defects could be found during clinical examination in 45%of patients with a median size of 5 mm(95%CI 3 to 10).Smaller defects were less likely to be palpable(r=-0.44,95%CI-0.08 to-0.7,p=0.021).Likewise,ultrasound was used more frequently with smaller fascial defect sizes(r=-0.51,95%Cl-0.16 to-0.74,p=0.007).Laparoscopic repair was used in 11 patients(19%)and more often(4/11)in combination with another simultaneous procedure than open repair(11/48).Conclusions Epigastric hernias are primarily a condition of the preschool *** can be beneficial if the diagnosis cannot be made clinically;otherwise,it is abdicable if it does not change the management of the patient's epigastric *** repairs might be beneficial for children with multiple defects or simultaneous procedures.

关键词： diagnosis primarily otherwise

Respiratory supercomplexes:structure,function and assembly

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Protein & Cell 2013年第8期4卷 582-590页

作者： Rasika Vartak christina Ann-Marie Porras Yidong Bai Department of Cellular and Structural Biology University of Texas Health Science Center at San AntonioSan AntonioTX 78229USA

The mitochondrial respiratory chain consists of 5 enzyme complexes that are responsible for ATP *** paradigm of the electron transport chain as discrete enzymes diffused in the inner mitochondrial membrane has been replaced by the solid state supercomplex model wherein the respiratory complexes associate with each other to form supramolecular *** in these supercomplexes,which have been shown to be functionally active and required for forming stable respiratory complexes,have been associated with many genetic and neurodegenerative disorders demonstrating their biomedical signifi *** this review,we will summarize the functional and structural signifi cance of supercomplexes and provide a comprehensive review of their assembly and the assembly factors currently known to play a role in this process.

关键词： supercomplex mitochondrial respiration

Corrosion Protection of CNTs/CNFs Modified Cement Mortars

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Journal of Materials Science and Chemical Engineering 2022年第8期10卷 1-17页

作者： christina V. Panagiotakopoulou Panagiotis Papandreopoulos George Batis Department of Chemical Engineering National Technical University of Athens Athens Greece

The aim of this study is to examine the performance of nano additives in two different sets of mortar specimens armed with reinforcing steel rebars. In particular, three sets of reinforced concrete cylinders with additives of 0.1% wt of carbon nanotubes (CNTs) and carbon nanofibers (CNFs) have been exposed to a solution of 3.5% NaCl, and further examined for the impact of nano-modification on corrosion performance. The anti-corrosive performance of these additives was investigated through linear polarization technique (LPR), mass loss and mercury porosimetry technique (MIP). From the investigation results, it is found that the addition of CNTs/CNFs causes lower steel corrosion, whereas the pore structure of concrete with CNTs/CNFs can significantly reduce the mass loss rate and the relative permeability.

关键词： Nano Additives CNTs/CNFs Cement Mortars Corrosion Resistance Electrochemical Measurements Porosimetry

The distribution,characteristics and fluid sources of lode gold deposits:An overview

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Science China Earth Sciences 2021年第9期64卷 1463-1480页

作者： christina Yan WANG Bo WEI Wei TAN Zaicong WANG Qingdong ZENG CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou510640China CAS Center for Excellence in Deep Earth Science Chinese Academy of SciencesGuangzhou510640China State Key Laboratory of Geological Processes and Mineral Resources(GPMR) School of Earth SciencesChina University of GeosciencesWuhan430074China Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China Institutions of Earth Science Chinese Academy of SciencesBeijing100029China University of Chinese Academy of Sciences Beijing100029China

Lode gold deposits are among the most economically important types of gold deposits in the ***,they formed mainly in three time intervals,2.8 to 2.5 Ga,2.1 to 1.8 Ga,and 700 Ma to the *** of ore-forming fluids and other components are of critical importance in a better understanding of the genesis and the geodynamic controls of these *** ore-forming fluids were mostly derived from devolatization of sedimentary and/or volcanic sequences during greenschist to amphibolite facies metamorphism associated with orogenic deformation,magmatic hydrothermal fluids have been increasingly shown to be important in many gold deposits in various *** this review paper,we summarize the major features of lode gold deposits,possible sources of ore-forming fluids,and mechanisms of gold *** we acknowledge the critical role of metamorphically derived fluids in the genesis of such deposits worldwide,we emphasize that mantle-or basaltic magma-derived fluids may have been much more important than commonly *** use the Liaodong peninsula of the North China Craton as an example to demonstrate the significance of mantle-derived *** earlier studies and new data,we show that some of the late Mesozoic lode gold deposits in the North China Craton may have formed from magmatic hydrothermal fluids due to the extension and partial melting of the hydrated,metasomatized subcontinental lithosphere mantle,as best exemplified by the Wulong gold deposit.

关键词： Lode gold deposit Ore-forming fluid Metasomatized subcontinental lithosphere mantle Mantle-derived melt/fluid North China Craton

Impacts of COVID-19 pandemic on urban park visitation:a global analysis

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Journal of Forestry Research 2021年第2期32卷 553-567页

作者： Dehui(christina)Geng John Innes Wanli Wu Guangyu Wang Faculty of Forestry University of British Columbia2424 Main MallVancouverBC V6T 1Z4Canada

The COVID-19 pandemic has resulted in over 33 million confirmed cases and over 1 million deaths globally,as of 1 October *** the lockdown and restrictions placed on public activities and gatherings,green spaces have become one of the only sources of resilience amidst the coronavirus pandemic,in part because of their positive effects on psychological,physical and social cohesion and spiritual *** study analyzes the impacts of COVID-19 and government response policies to the pandemic on park visitation at global,regional and national levels and assesses the importance of parks during this global *** data we collected primarily from Google’s Community Mobility Reports and the Oxford Coronavirus Government Response *** results for most countries included in the analysis show that park visitation has increased since February 16th,2020 compared to visitor numbers prior to the COVID-19 *** on social gathering,movement,and the closure of workplace and indoor recreational places,are correlated with more visits to ***-at-home restrictions and government stringency index are negatively associated with park visits at a global *** from residents for parks and outdoor green spaces has increased since the outbreak began,and highlights the important role and benefits provided by parks,especially urban and community parks,under the COVID-19 *** provide recommendations for park managers and other decision-makers in terms of park management and planning during health crises,as well as for park design and *** particular,parks could be utilized during pandemics to increase the physical and mental health and social well-being of individuals.

关键词： COVID-19 COVID-19 response policies Parks visitation Stepwise regression analysis Urban parks