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Lithic soils in the semi-arid region of Brazil:edaphic characterization and susceptibility to erosion

Journal of Arid Land 2022年第1期14卷 56-69页

作者： carlos R PINHEIRO JUNIOR conan A SALVADOR Tiago R TAVARES marcel c abreu Hugo S FAGUNDES Wilk S ALMEIDA Eduardo c SILVA NETO Lúcia H c ANJOS Marcos G PEREIRA Federal Rural University of Rio de Janeiro(UFRRJ) Department of SoilsSeropédicaRio de Janeiro 23890Brazil center for Nuclear Energy in Agriculture(cENA) University of São Paulo(USP)PiracicabaSão Paulo 13416Brazil Federal Institute of Education Science and Technology of Rondônia(IFRO)Rural ZoneAriquemesRondônia 78930Brazil

Soils(Leptosols or Epileptic Regosols)with lithic contact at a depth of 50 cm occupy almost 20%of the Brazilian semi-arid *** lithic soils are susceptible to erosion due to faster saturation of water-holding capacity during rainfall,which accelerates the beginning of ***,erosion traits of lithic soils in the semi-arid region of Brazil are less *** aim of this study was to characterize the soil and landscape attributes in areas with Neossolos Litólicos(Entisols)in the caatinga biome to identify region of high susceptibility to *** showed that the soils were characterized by a sandy texture,soil structure with poor development and low content of organic *** attributes increase susceptibility to erosion and reduce water storage capacity,especially in the states of cearáand *** these states,the content of rock fragments in the soil reaches 790 g/*** contents of silt and fine sand,high silt/clay ratio,predominance of Leptosols and strong rainfall erosivity were observed in Piauíand northwestern ceará.A very high degree of water erosion was observed in the states of Pernambuco and Paraí*** the low degree of erosion observed in the state of Bahia,it is highly susceptible to erosion due to the predominance of very shallow soils,rugged relief and high values of rainfall *** vulnerability was observed in the state of Alagoas because of its more smoothed relief,greater effective soil depth,thicker A horizon of soil and lower rainfall *** general,the characteristics that intensify the susceptibility to erosion in the caatinga biome are those soil structures with poor development or without aggregation,low contents of organic carbon,high contents of silt and fine sand,high values of silt/clay ratio and rugged relief in some *** study collected information contributing to a better characterization of soils with lithic contact in the semi-arid region of *** addition,regions with

关键词： caatinga biome drylands erosive processes leptosols soil degradation

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Light sheet microscope scanning of biointegrated microlasers for localized refractive index sensing

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Photonics Research 2024年第8期12卷 1673-1680页

作者： ROSS c.cOWIE marcel ScHUBERT SUPA School of Physics and AstronomyUniversity of St AndrewsSt AndrewsUK Humboldt centre for Nano and Biophotonics Department of ChemistryUniversity of CologneCologneGermany

Whispering gallery mode(WGM)microlasers are highly sensitive to localized refractive index changes allowing to link their emission spectrum to various chemical,mechanical,or physical *** recently found applications in biological studies within single cells,in three-dimensional samples such as multicellular spheroids,or in ***,detailed studies of biological samples also need to account for the structural heterogeneity of tissues and live animals,therefore requiring a combination of high-resolution microscopy and laser ***,we design and construct a light sheet fluorescence microscope with a coupled spectrometer for use in microlaser studies for combined high-resolution,high-speed imaging and WGM spectral *** light sheet illumination profile and the decoupled geometry of excitation and emission hereby directly affect the lasing and sensing properties,mainly through geometric constraints and by light coupling *** demonstrate the basic working principle of microlaser spectroscopy under light sheet excitation and measure the absolute refractive index within agarose and in zebrafish tail muscle *** further analyze the light coupling conditions that lead to the occurrence of two separate oscillation *** so-called cross modes can be scanned around the entire microlaser surface,which allows to estimate a surface-averaged refractive index profile of the microlaser environment.

关键词： refractive index excitation

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Deformable microlaser force sensing

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Light(Science & Applications) 2024年第6期13卷 1196-1209页

作者： Eleni Dalaka Joseph SHill Jonathan H.H.Booth Anna Popczyk Stefan R.Pulver Malte c.Gather marcel Schubert centre of Biophotonics SUPASchool of Physics and AstronomyUniversity of St AndrewsNorth HaughSt AndrewsUK Humboldt centre for Nano-and Biophotonics Department of ChemistryUniversity of CologneKölnGermany School of Psychology and Neuroscience University of St AndrewsSt Mary’s QuadSouth StreetSt AndrewsUK Institute for Bioengineering of catalonia BarcelonaSpain

Mechanical forces are key regulators of cellular behavior and function,affecting many fundamental biological processes such as cell migration,embryogenesis,immunological responses,and pathological *** force sensors and imaging techniques have been developed to quantify these otherwise invisible forces in single cells and in ***,current techniques rely heavily on high-resolution microscopy and do not allow interrogation of optically dense tissue,reducing their application to 2D cell cultures and highly transparent biological ***,we introduce DEFORM,deformable microlaser force sensing,a spectroscopic technique that detects sub-nanonewton forces with unprecedented spatio-temporal *** is based on the spectral analysis of laser emission from dye-doped oil microdroplets and uses the force-induced lifting of laser mode degeneracy in these droplets to detect nanometer *** validation by atomic force microscopy and development of a model that links changes in laser spectrum to applied force,DEFORM is used to measure forces in 3D and at depths of hundreds of microns within tumor spheroids and late-stage Drosophila *** furthermore show continuous force sensing with single-cell spatial and millisecond temporal resolution,thus paving the way for non-invasive studies of biomechanical forces in advanced stages of embryogenesis,tissue remodeling,and tumor invasion.

关键词： invasion otherwise hundreds

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Broad Hormonal Responses Induced by Aluminum in Roots of Dwarf Transgenics of Solanum lycopersicum L. cv “Micro-Tom”

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American Journal of Plant Sciences 2024年第5期15卷 349-358页

作者： Arthur B. Rates Daniela Boanares Daniele S. G. Pianetti Felipe Della-Torre Joni E. Lima marcel G. c. França Department of Botany and Plant Physiology Laboratory Federal University of Minas Gerais Belo Horizonte Brazil

The spatial pattern distribution of plant hormones in response to aluminum (Al) toxicity in roots remains to be shown. This study was performed to assess the root hormonal accumulation and gene expression in response to Al toxicity in five transgenic miniature dwarf tomatoes cv. Micro-Tom (MT). MT and MT transgenics to acid indole acetic, cytokinin, gibberellin, abscisic acid and ethylene were cultivated in nutrient solutions containing different Al concentrations. Root growth elongation was measured and cellular damage was visualized by staining Evans’s blue. The GUS reporter gene staining technique was used to visualize hormonal changes in MT apex root tissues. Data indicated that the MT is sensitive to Al that induced significant growth inhibition and cellular damage. Al concentration of 27 μM was significantly toxic, inducing root apex darkening and inhibition of root development. The qualitative evaluation of GUS reporter gene expression showed intense crosstalk among all hormones studied, underscoring the complexity of signaling induced by Al in apex roots. Results point out to a major understanding of the hormonal signaling in response to Al toxicity, which may induce a change of root growth and architecture with growth inhibition and cell constraints modulated by all different hormones evaluated.

关键词： Gene Reporter Metal Plant Hormones Root Staining

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Hydroelectrolytic and Energetic Replenisher in Horses Undergoing Marcha Training

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Open Journal of Veterinary Medicine 2024年第8期14卷 203-216页

作者： José D. Ribeiro Filho Bruna M. Ribeiro Micheline O. Silva Samuel R. Alves Anaïs c. Benitez Waleska M. F. Dantas marcel F. B. Avanza Raffaella B. c. Teixeira Pedro Ancelmo N. Ermita Laice A. Silva Rinaldo B. Viana Hélio c. Manso Filho Department of Veterinary Federal University of Viosa Viosa Brazil Institute of Studies of the Wet Tropic Federal University of Southern and Southeastern Par Xinguara Brazil Department of Veterinary clinic and Surgery Federal University of Minas Gerais Belo Horizonte Brazil Institute of Animal Health and Production Federal Rural University of Amazonia Belm Brazil Zootecnics Department Federal Rural University of Pernambuco Recife Brazil

The study aimed to assess the clinical, laboratory, and blood gas analysis of horses undergoing Marcha training and the effects of voluntary ingestion of hydroelectrolytic and energy replenishers after exercise. Eight horses of both genders aged between 5 and 10 years, were included in the study. The exercise consisted of a 10-min warm-up followed by 45 min uninterrupted Marcha on a flat dirt track in the morning. After exercise, the horses received one of the following treatments: Drinking water (control group);Hydroelectrolytic and energy replenisher containing sodium chloride, potassium chloride, calcium acetate, magnesium chloride, sodium citrate, dextrose, maltodextrin, and sucrose in three different concentrations (Replenishers A, B, and c). The horses were distributed across the four treatments in a 4 × 4 Latin Squares design using a Split-plot system with 48-hr intervals. clinical and laboratory evaluations were conducted at four time points: T0 - 5 min before exercise;T1 - up to 5 min after exercise;T2 - 2 hr after starting treatment;and T4 - 4 hr after beginning treatment. concentrations of urea, creatinine, lactate, phosphorus, and ionized calcium significantly changed after exercise. An increase in blood pH and a decrease in chloride concentrations were observed when replenishers B and c were offered after exercise. The replacements were ingested spontaneously by the animals in a volume greater than that of the control group (water). Replacement B was the most ingested by the animals, demonstrating its greatest potential.

关键词： Dehydration Electrolyte Replacement Exercise Rehydration Voluntary Intake

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Urea breath test for Helicobacter pylori infection in adult dyspeptic patients: A meta-analysis of diagnostic test accuracy

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World Journal of Gastroenterology 2024年第6期30卷 579-598页

作者： Fabian Fellipe Bueno Lemos caroline Tianeze de castro marcel Silva Luz Gabriel Reis Rocha Gabriel Lima correa Santos Luís Guilherme de Oliveira Silva Mariana Santos calmon cláudio Lima Souza Ana carla Zarpelon-Schutz Kádima Nayara Teixeira Dulciene Maria de Magalhães Queiroz Fabrício Freire de Melo Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil Instituto de Saúde coletiva Universidade Federal da BahiaSalvador 40110040BahiaBrazil campus Toledo Universidade Federal do ParanáToledo 85919-899ParanáBrazil Laboratory of Research in Bacteriology UFMGBelo Horizonte 30130-100Minas GeraisBrazil

BAcKGROUND Helicobacter pylori(***)infection has been well-established as a significant risk factor for several gastrointestinal *** urea breath test(UBT)has emerged as a leading non-invasive method for detecting *** numerous studies confirming its substantial accuracy,the reliability of UBT results is often compromised by inherent *** findings underscore the need for a rigorous statistical synthesis to clarify and reconcile the diagnostic accuracy of the UBT for the diagnosis of *** *** To determine and compare the diagnostic accuracy of 13c-UBT and 14c-UBT for *** infection in adult patients with *** We conducted an independent search of the PubMed/MEDLINE,EMBASE,and cochrane central databases until April *** search included diagnostic accuracy studies that evaluated at least one of the index tests(^(13)c-UBT or ^(14)c-UBT)against a reference *** used the QUADAS-2 tool to assess the methodo-logical quality of the *** utilized the bivariate random-effects model to calculate sensitivity,specificity,positive and negative test likelihood ratios(LR+and LR-),as well as the diagnostic odds ratio(DOR),and their 95%confidence *** conducted subgroup analyses based on urea dosing,time after urea administration,and assessment *** investigate a possible threshold effect,we conducted Spearman correlation analysis,and we generated summary receiver operating characteristic(SROc)curves to assess ***,we visually inspected a funnel plot and used Egger’s test to evaluate publication *** both as reliable diagnostic tools in clinical *** In summary,our study has demonstrated that ^(13)c-UBT has been found to outperform the ^(14)c-UBT,making it the preferred diagnostic ***,our results emphasize the significance of carefully considering urea dosage,assessment timing,and measurement techniques for both tests to enh

关键词： Helicobacter pylori Urea breath test Diagnosis Diagnostic test accuracy Meta-analysis

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Short-Term and Long-Term Margins of International Trade： Evidence from the canada-chile Free Trade Agreement

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Frontiers of Economics in china-Selected Publications from chinese Universities 2018年第1期13卷 93-115页

作者： Zhiqi chen marcel c. Voia Department of Economics Carleton University Ottawa Ontario K1S 5B6 Canada

We investigate the impact of the canada-chile Free Trade Agreement （ccFTA） on canadian exports to chile, particularly the dynamic effects of the agree- ment on extensive and intensive margins of trade. consistent with the literature, we find that the extensive margin effects occurred later than the intensive margin effects and became more prominent in the long-term. Surprisingly, the intensive margin ef- fects died off in the long-term. A theoretical model is constructed to show that our results can arise in a standard setting of intra-industry trade.

关键词： preferential trade agreements margins of international trade canada-chile trade nonparametric decompositions regression discontinuity

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Bacteriological Profile of Infections Encountered in a Pneumology Service in a Moderate-Income country [Pneumology Department of cHU cocody (côte d’Ivoire)]

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Open Journal of Respiratory Diseases 2024年第1期14卷 1-11页

作者： Brou Jean marcel Ahui Alitonde Eudoxie Djegbeton Alima Kone Marc-Olivier Koffi Kouame clarisse Elogne Mobio Nancy Hermine Benjamin Kouraogo Erick Akouatia constante Virginie Brou-Gode Kigninlman Horo Boko Alexandre Kouassi Ngoran Koffi Pneumology Service Teaching Hospital of Cocody Abidjan C&#244te d’Ivoire Medical School of Abidjan University Félix Houphou&#235t Boigny Abidjan C&#244te d’Ivoire Pasteur Institute of cô te d’Ivoire Abidjan C&#244te d’Ivoire

Introduction: Infections represent a real public health problem aggravating the morbidity and mortality of hospitalized patients. Methods: This was a retrospective study with descriptive purposes over a period of 05 years, in the Pneumology Department of the University Hospital of cocody. Results: The average age in our population was 42 years. We observed a male predo- minance of 64.5%, with a sex ratio of 1.8. Medical history was dominated by HIV infection (23.5%), followed by tuberculosis (15.6%). concerning lifestyle, smoking was found in 38% of cases. Symptoms progressed chronically in 80% of cases. An infectious syndrome was found in 75% of cases. Microbial culture was positive in 42% of cases. Pseudomonas aeruginosa and Klebsiella pneumoniae were encountered in 26.4% of cases each, followed by Echerichia coli in 10.4% of cases. Klebsiella pneumoniae in the first three years topped the list, but gradually. Pseudomonas aeruginosa maintained its leadership over the last three years. Pseudomonas aeruginosa isolates expressed a resistance rate of 9.8% to ceftazidime and 8.1% to imipenem;to aztreonam (36%), ticarcillin (33.3%) and levofloxacin. These strains were susceptible to fosfomycin (100%), mero- penem (96.6%) and amikacin (96%). For isolated strains of Entero- bacteria- ceae, resistance was observed about ticarcillin (83.3%) and amoxicillin clavula- nic acid (71.2%). Streptococcaceae showed resistance to tetracycline (69.2%) and erythromycin (50%). Over the years there has been an increase in re- sistance to amoxicillin-clavulanic acid ceftriaxone. The death rate was 14%. conclusion: The bacterial profile of infections is dominated by germs respon- sible for nosocomial infection with significant mortality.

关键词： Bacterial Pleural Pneumonia Nosocomial Infection Sub-Saharan Africa Antibiotic Therapy

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Impact of cOVID-19 effective reproductive rate on cryptocurrency

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Financial Innovation 2022年第1期8卷 1432-1458页

作者： marcel c.Minutolo Werner Kristjanpoller Prakash Dheeriya Robert Morris University 6001 University BlvdMoon TownshipPA 15108USA Departamento de Industrias Universidad Técnica Federico Santa MaríaAv.España 1680ValparaísoChile california State University Dominguez Hills 1000 E Victoria StCarsonCA 90747USA

The importance of cryptocurrency to the global economy is increasing steadily,which is evidenced by a total market capitalization of over$2.18T as of December 17,2021,according to ***(coin,2021).cryptocurrencies are too confusing for laymen and require more *** this study,we analyze the impact that the effective reproductive rate,an epidemiological indicator of the spread of cOVID-19,has on both the price and trading volume of eight of the largest digital currencies—Bitcoin,Ethereum,Tether,Ripple,Litecoin,Bitcoin cash,cardano,and *** hypothesize that as the rate of spread decreases,the trading price of the digital currency *** Generalized Autoregressive conditional Heteroskedasticity models,we find that the impact of the spread of cOVID-19 on the price and trading volume of cryptocurrencies varies by currency and *** findings offer novel insight into the cryptocurrency market and the impact that the viral spread of cOVID-19 has on the value of the major cryptocurrencies.

关键词： cOVID-19 cryptocurrency Bitcoin GARcH Digital currency Fintech

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High efficiency gas-liquid separation system for pumped wells

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Petroleum 2019年第2期5卷 178-182页

作者： L.Enrique Ortiz-Vidal marcel c.Barbosa Oscar M.H.Rodriguez Industrial Multiphase Flow Laboratory(LEMI) Mechanical Engineering DepartmentS~ao Carlos School of EngineeringUniversity of S~ao Paulo(USP)13563-120Sao CarlosSPBrazil

Gas-liquid separation is a very common process in industrial plants,where often high Efficiency of Gas Separation(EGS)is *** the upstream oil industry,gas separation is also crucial for the proper operation of Electrical Submergible Pumps(ESP).Recent studies report the excellent performance of a gravitational separator known as Inverted-Shroud separator(IS-separator).Laboratory results indicate that this kind of separator can achieve total gas separation for a wide range of operation conditions under continuous two-phase *** original intent is to use the IS-separator for downhole gas separation in oil production ***,by account of its simple design and relatively compact size,it may be suitable for using in industrial *** this paper,we present the IS-separator in details,including geometry characteristics and *** equipment performance is also *** addition,the challenges related to the deep understanding of the gas separation process inside the IS-separator and the possible practical solutions are outlined.

关键词： separation pumped details

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