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Effects of Exposure to Extremely Low Frequency Electro-magnetic Fields on Circadian Rhythms and Distribution of Some Leukocyte Differentiation Antigens in Dairy Cows

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Biomedical and Environmental Sciences 2007年第2期20卷 164-170页

作者： CALOGERO STELLETTA PAOLA DE NARDO FRANCESCO SANTIN GIUSEPPE BASSO BARBARA MICHIELOTTO GIUSEPPE PICCIONE massimo morgante Università degli Studi di Padova Dipartimento di Scienze Cliniche VeterinarieViale dell'Università 1635020 Legnaro(PD)Italy Istituto Superiore di Sanità Dipartimento Ambiente e Connessa Prevenzione Primaria Viale Regina Elena 29900161 RomaItaly Università degli Studi di Padova Oncoematologia Pediatrica Via Giustiniani 335128 PadovaItaly Università degli Studi di Messina Dipartimento di Morfologia BiochimicaFisiologia e Produzioni AnimaliLaboratorio di Cronofisiologia VeterinariaSezione di Fisiologia VeterinariaPolo Universitario dell'Annunziata98168MessinaItaly

Objective To investigate the effects of extremely low frequency magnetic and electric fields （ELFEMFs） emitted from 380 kV transmission lines on some leukocyte differentiation antigens in dairy cows. Methods The study was carded out in 5 cows exposed to 1.98-3.28 μT of ELFEMFs and in 5 control cows exposed to 0.2-0.7 μT of ELFEMFs. Following haematological and immunologic parameters were measured in both groups： WBC, CD45R, CD6, CD4, CD8, CD21, and CD11B leukocyte antigen expression. Results Some of the haematological and immunologic parameters under investigation were similar in both groups. However, CD8 （T lymphocyte surface antigen） was higher in the exposed group （1.35 ±0.120 vs 0.50 ±0.14×10^3/mL）. Furthermore, the CD4/CD8 ratio （0.84 ±0.05 and 2.19±0.16 for exposed and not exposed cows respectively） and circadian rhythm were different between the two groups. Conclusion Exposure to ELFEMFs is responsible of the abnormal temporal variations and distribution of some haematological and immunological parameters in dairy cows.

关键词： Electro-magnetic fields Low frequency Leukocyte Circadian rhythm Dairy cow

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Phase diagram of muonium hydride:the significant effect of dimensionality

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Communications in Theoretical Physics 2024年第2期76卷 182-187页

作者： Jieru Hu massimo Boninsegni Department of Physics University of Alberta State Key Laboratory of Precision Spectroscopy East China Normal University

We carry out a theoretical investigation of the low-temperature phase diagram of muonium hydride in two dimensions,using numerical *** is shown that the phase diagram of this substance is qualitatively different in two and three ***,while in three dimensions it is essentially identical to that of parahydrogen,i.e.,only displaying a single(crystalline)*** two dimensions it is very similar to that of^(4)He,with an equilibrium liquid phase that turns superfluid at a temperature as high as~2.2 K,and crystallizes under applied *** is a well-described case of a continuous-space condensed matter system whose ground state equilibrium phase is qualitatively altered by dimensional reduction.

关键词： quantum fuids and solids quantum Monte Carlo phase diagrams

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Excavation compensation and bolt support for a deep mine drift

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3206-3220页

作者： Longji Guo Zhigang Tao Manchao He massimo Coli State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing100083China School of Mechanics&Civil Engineering China University of Mining and Technology(Beijing)Beijing100083China Department of Earth Sciences University of FlorenceFirenze50121Italy

To overcome large deformation of deep phosphate rock roadways and pillar damage,a new type of constant-resistance large-deformation negative Poisson’s ratio(NPR)bolt that can withstand a high prestress of at least 130 KN was *** the conducted tests,the amount of deformation was 200-2000 mm,the breaking force reached 350 KN,and a high constant-resistance pre-stress was maintained during the deformation process.A stress compensation theory of phosphate rock excavation based on NPR bolts is proposed together with a balance system for bolt compensation of the time-space effect and high NPR *** split-set rock bolts are unable to maintain the stability of roadway roofs and *** verify the support effect of the proposed bolt,field tests were conducted using both the proposed NPR bolts and split-set rock bolts as support systems on the same mining *** addition,the stress compensation mechanism of roadway mining was simulated using the particle flow code in three dimensions(PFC^(3D))-fast Lagrangian analysis of continua(FLAC^(3D))particle-flow coupling numerical ***-site monitoring and numerical simulations showed that the NPR excavation compensation support scheme effectively improves the stress state of the bolts and reduces the deformation of the surrounding *** to the original support scheme,the final deformation of the surrounding rock was reduced by approximately 70%.These results significantly contribute to domestic and foreign research on phosphate-rock NPR compensation support technology,theoretical systems,and engineering practices,and further promote technological innovation in the phosphate rock mining industry.

关键词： Deep phosphate rock NPR bolt Split-set rock bolt PFC3D-FLAC3D Compensation support

Portal hypertension in patients with nonalcoholic fatty liver disease:Current knowledge and challenges

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World Journal of Gastroenterology 2024年第4期30卷 290-307页

作者： Anita Madir Ivica Grgurevic Emmanuel A Tsochatzis massimo Pinzani Department of Gastroenterology Hepatology and Clinical NutritionUniversity Hospital DubravaZagreb 10000Croatia School of Medicine University of ZagrebZagreb 10000Croatia Faculty of Pharmacy and Biochemistry University of ZagrebZagreb 10000Croatia UCL Institute for Liver and Digestive Health Royal Free Hospital and University College LondonLondon NW32PFUnited Kingdom

Portal hypertension(PH)has traditionally been observed as a consequence of significant fibrosis and cirrhosis in advanced non-alcoholic fatty liver disease(NAFLD).However,recent studies have provided evidence that PH may develop in earlier stages of NAFLD,suggesting that there are additional pathogenetic mechanisms at work in addition to liver *** early development of PH in NAFLD is associated with hepatocellular lipid accumulation and ballooning,leading to the compression of liver *** compression and intraluminal obstacles cause mechanical forces such as strain,shear stress and elevated hydrostatic pressure that in turn activate mechanotransduction pathways,resulting in endothelial dysfunction and the development of *** spatial distribution of histological and functional changes in the periportal and perisinusoidal areas of the liver lobule are considered responsible for the pre-sinusoidal component of PH in patients with ***,current diagnostic methods such as hepatic venous pressure gradient(HVPG)measurement tend to underestimate portal pressure(PP)in NAFLD patients,who might decompensate below the HVPG threshold of 10 mmHg,which is traditionally considered the most relevant indicator of clinically significant portal hypertension(CSPH).This creates further challenges in finding a reliable diagnostic method to stratify the prognostic risk in this population of *** theory,the measurement of the portal pressure gradient guided by endoscopic ultrasound might overcome the limitations of HVPG measurement by avoiding the influence of the pre-sinusoidal component,but more investigations are needed to test its clinical utility for this *** and spleen stiffness measurement in combination with platelet count is currently the best-validated non-invasive approach for diagnosing CSPH and varices needing *** change remains the cornerstone of the treatment of PH in NAFLD,together with correcting the comp

关键词： Non-alcoholic fatty liver disease Portal hypertension Mechanotransduction Endothelial dysfunction Hepatic venous pressure gradient

High risk of thrombosis recurrence in people with idiopathic or only locally caused non-cirrhotic splanchnic vein thrombosis: it is time for guidelines’ revision

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Hepatobiliary Surgery and Nutrition 2024年第4期13卷 699-702页

作者： massimo Primignani Giulia Tosetti Andrea Artoni Fondazione IRCCS Ca’Granda Ospedale Maggiore Policlinico–SC Gastroenterologia ed Epatologia MilanItaly Angelo Bianchi Bonomi Hemophilia and Thrombosis Center Fondazione IRCCS Ca'Granda Ospedale Maggiore PoliclinicoMilanItaly

Portal hypertension caused by non-cirrhotic(and non neoplastic)splanchnic vein thrombosis(NC-SVT)is responsible for 5–10%of portal hypertension cases in the western world(1).Chronic myeloproliferative neoplasms(MPN)or systemic prothrombotic disorders are in cause in about 40%of subjects,while in about 30%a local condition,such as recent abdominal surgery or infection/inflammation triggers the *** local condition,however,can only be the precipitating cause,since a thorough screening allows identifying the co-occurrence of systemic thrombophilia in about 30%of such ***,screening is mandatory even in cases where the cause of NC-SVT seems ***,about 30%of cases of NC-SVT remains unexplained and defined idiopathic(1).

关键词： Non-cirrhotic splanchnic vein thrombosis factor VIII thrombosis recurrence

Crustal magma oxidation state and endowments in porphyry copper deposits

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Science China Earth Sciences 2024年

作者： Yumin AI massimo CHIARADIA Chao WU Huayong CHEN Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Earth Sciences University of Geneva Guangdong Provincial Key Laboratory of Mineral Physics and Materials

Porphyry copper deposits (PCDs) supply the majority of the world’s copper (Cu) as well as significant amounts of molybdenum (Mo) and gold (Au). The formation of these deposits is controlled by a variety of geological factors, among which the magmatic oxidation is one of the focuses of current research. This study investigates the redox characteristics of arc magmas by analyzing the ratio of vanadium (V) to scandium (Sc) and its correlation with the oxygen fugacity (f O) of magmas from arcs of various crustal thicknesses globally. We compiled an extensive dataset of published V/Sc values and studied the partition coefficients of Vand Sc between minerals and silicate melts across various magmatic environments. The results demonstrate that fractional crystallization of magnetite markedly reduces V/Sc values of the residual melt. Furthermore, magnesium number(Mg#) at the onset of magnetite fractionation is strongly positively correlated with f O of the equilibrium magma. Based on this,the oxidation of arc magmas from different crustal thicknesses can be evaluated. The result suggests that magmas generated in crusts thicker than 20 km tend to be more oxidized with increasing crust thickness. This trend is attributed to enhanced intracrustal differentiation processes involving garnet and amphibole, particularly in mature island and continental arcs. In contrast,magmas in thinner arc crusts (<20 km), which are significantly influenced by subducted slab materials, display higher oxidation states than most of their thicker crust counterparts. These findings suggest that both subduction dynamics and crustal thickness play a vital role in determining the oxidation state of arc magmas and, consequently, their capacity to generate PCDs. Highly oxidized, primitive arc magmas are less favorable for PCD formation due to that they tend to experience magnetite fractionation and thus sulfide saturation in the early stage of magma evolution, a process leading to copper depletion. On th

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In vivo polydopamine coating of Rhodobacter sphaeroides for enhanced electron transfer

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Nano Research 2024年第2期17卷 875-881页

作者： Rossella Labarile Danilo Vona Maria Varsalona Matteo Grattieri Melania Reggente Roberto Comparelli Gianluca M.Farinola Fabian Fischer Ardemis A.Boghossian massimo Trotta Istituto per i Processi Chimico Fisici Consiglio Nazionale delle RicercheBari 70126Italy Dipartimento di Chimica Universitàdegli Studi di BariBari 70126Italy Institute of Chemical Sciences and Engineering(ISIC) Ecole Polytechnique Fédérale de Lausanne(EPFL)Lausanne 1015Switzerland Institute of Life Technologies HES-SO Valais-Wallis1950 SionSwitzerland Institute for Renewable Energy HES-SO Valais-Wallis1950 SionSwitzerland

Recent advances in coupling light-harvesting microorganisms with electronic components have led to a new generation of biohybrid devices based on microbial *** devices are limited by the poorly conductive interface between phototrophs and synthetic materials that inhibit charge *** study focuses on overcoming this bottleneck through the metabolically-driven encapsulation of photosynthetic cells with a bio-inspired conductive *** of the purple non sulfur bacterium Rhodobacter sphaeroides were coated with a polydopamine(PDA)nanoparticle layer via the self-polymerization of dopamine under anaerobic *** treated cells show preserved light absorption of the photosynthetic pigments in the presence of dopamine concentrations ranging between 0.05–3.5 *** thickness and nanoparticle formation of the membrane-associated PDA matrix were further shown to vary with the dopamine concentrations in this *** to uncoated cells,the encapsulated cells show up to a 20-fold enhancement in transient photocurrent measurements under mediatorless *** biologically synthesized PDA can thus act as a matrix for electronically coupling the light-harvesting metabolisms of cells with conductive surfaces.

关键词： bioelectronics photosynthetic bacteria purple bacteria electron transfer polydopamine biophotovoltaics

Assessment of slow deformations and landslide modelling in the urban area through a multi-methodological approach

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Journal of Earth Science 2024年

作者： Fabio Ietto massimo Conforti Cristiano Tolomei Federico Cella Giuseppe Cianflone Università degli Studi della Calabria， Dipartimento di Biologia， Ecologia e Scienze della Terra (DiBEST)， Via P.Bucci， Cubo 15B， 87036 Consiglio Nazionale Ricerche (CNR)， Istituto di Ricerca per la Protezione Idrogeologica (IRPI)， Via Cavour INGV-Istituto Nazionale di Geofisica e Vulcanologia， Via di Vigna Murata 605 Università di Camerino， Scuola di Scienze e Tecnologia， Sez.Geologia， Via Gentile III da Varano 27

Slow-moving landslides are widespread in the Mediterranean area， causing damage to the exposed facilities and economic losses in many countries. The recognition of slow-moving landslides in urban areas is always a difficult task to deal with because the presence of buildings， infrastructures， and human activities usually conceals the morphological signs of these landslide activities. So， in the last decades， numerous researchers have shown new methodologies to deepen the studies of similar instability phenomena. The present research is based on an integrated approach to investigate the landslide boundaries， type of movement， failure surface depth， and vulnerability state of buildings in Rota Greca village (Calabria region， southern Italy) affected by a slow-moving landslide. For this purpose， multi-source data were acquired through geological and geomorphological surveys， recognition of landslide-induced damage on the built environment， subsurface investigations (e.g.， continuous drill boreholes， Standard Penetration Test， Rock Quality Designation index and inclinometer monitoring)， laboratory tests (direct shear tests on undisturbed samples)， geophysical survey， and InSAR-derived map of deformation rates. The complete integration of multi-source data allowed for the construction of reliable landslide modelling with relative geotechnical properties. In addition， the cross-comparison between surface deformation data by SAR images and severity damage level collected on the exposed buildings enabled to obtain the vulnerability map of the built area. In particular， the achieved goals highlighted two failure surfaces at about -13 and -25 m depth， causing a high vulnerability value for the buildings allocated in the central portion of the Rota Greca village. The knowledge acquired by the multi-approach can be used to manage and implement appropriate landslide risk mitigation strategies， providing helpful advice and best practices to state-run organisations and stakeholder

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Polydopamine-coated photoautotrophic bacteria for improving extracellular electron transfer in living photovoltaics

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Nano Research 2024年第2期17卷 866-874页

作者： Melania Reggente Charlotte Roullier Mohammed Mouhib Patricia Brandl Hanxuan Wang Stefano Tacconi Francesco Mura Luciana Dini Rossella Labarile massimo Trotta Fabian Fischer Ardemis A.Boghossian Institute of Chemical Sciences and Engineering(ISIC) Ecole Polytechnique Fédérale de Lausanne(EPFL)Lausanne 1015Switzerland Department of Biology and Biotechnology Charles Darwin Sapienza University of RomeRome 00185Italy Research Center on Nanotechnology Applied for Engineering of Sapienza(CNIS) University of Rome SapienzaRome 00185Italy CNR-IPCF Consiglio Nazionale delle Ricerche–Istituto per i Processi Chimico Fisici Bari 70126Italy Institute of Life Technologies HES-SO Valais-WallisSion 1950Switzerland Institute for Renewable Energy HES-SO Valais-WallisSion 1950Switzerland

Living photovoltaics are microbial electrochemical devices that use whole cell–electrode interactions to convert solar energy to *** bottleneck in these technologies is the limited electron transfer between the microbe and the electrode *** study focuses on enhancing this transfer by engineering a polydopamine(PDA)coating on the outer membrane of the photosynthetic microbe Synechocystis *** coating provides a conductive nanoparticle shell to increase electrode adhesion and improve microbial charge extraction.A combination of scanning electron microscopy(SEM),transmission electron microscopy(TEM),UV–Vis absorption,and Raman spectroscopy measurements were used to characterize the nanoparticle shell under various synthesis *** cell viability and activity were further assessed through oxygen evolution,growth curve,and confocal fluorescence microscopy *** results show sustained cell growth and detectable PDA surface coverage under slightly alkaline conditions(pH 7.5)and at low initial dopamine(DA)concentrations(1 mM).The exoelectrogenicity of the cells prepared under these conditions was also characterized through cyclic voltammetry(CV)and chronoamperometry(CA).The measurements show a three-fold enhancement in the photocurrent at an applied bias of 0.3 V(***/AgCl[3 M KCl])compared to non-coated *** study thus lays the framework for engineering the next generation of living photovoltaics with improved performances using biosynthetic electrodes.

关键词： biophotovoltaics bioelectronics photosynthetic bacteria cyanobacteria polydopamine adherence