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Assessment of Vulnerability of Oxisols to Compaction in the Cerrado Region of Brazil

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Pedosphere 2010年第2期20卷 252-260页

作者： A.E.AJAYI M.S.DIAS JUNIOR N.CURI A.OKUNOLA T.T.TEIXEIRA SOUZA B.SILVA PIRES department of Agricultural Engineering Federal University of Technology departamento de Ci encia do Solo Universidade Federal de Lavras Federal College of Agriculture Fundacao de ensino superior de Passos Universidade do Estado do Minas Gerais

The Cerrado region of Brazil,one of the fastest-growing agricultural areas in the world,is undergoing very rapid mechanization;this development is good for the country's economy but may also snowball into substantial loss of agricultural land and other environmental degradation if the soil susceptibility and vulnerability to compaction is not well *** this study we explored different techniques for estimating soil intrinsic abilities to withstand applied pressure using the prevalent Oxisols of the Cerrado region under native *** samples were collected from three sites within the region and subjected to 1) compressibility test;2) manual penetration resistance test;3) automated penetration resistance test;and 4) packing density *** four methods produced analogous *** results showed the significant influence of soil structure on the inherent strength and compaction susceptibility of the *** also established the association of soil structure with the mineralogy of the *** is noteworthy that the packing density which was developed from very simple and easily obtained parameters could give a picture of the tendency of the soil to ***,this approach would be useful in developing compaction susceptibility maps for the *** could be concluded that most of the Oxisols in the Cerrado region would support mechanized agricultural production very ***,there is need for careful management of the mechanization process to avert *** management techniques should include conservationist practices such as no till in order to maintain as much as possible the favorable structure and drainage of these very old soils.

关键词： compressibility packing density penetration resistance soil structure

A biophysical perspective on the unexplored mechanisms driving Parkinson’s disease by amphetamine-like stimulants

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Neural Regeneration Research 2021年第11期16卷 2213-2214页

作者： Carla Ferreira Joana Couceiro Sandra Tenreiro Alexandre Quintas Molecular Pathology and Forensic Biochemistry Laboratory Centro de Investigação Interdisciplinar Egas MonizP-2825-084 CaparicaPortugal Laboratório de Ciências Forenses e Psicológicas egas moniz Campus Universitário–Quinta da GranjaMonte de CaparicaP-2825-084 CaparicaPortugal Faculty of Medicine of Porto University Al.Prof.Hernâni MonteiroP-4200–319 PortoPortugal iNOVA4Health CEDOCNOVA Medical SchoolNMSUniversidade Nova de Lisboa1169-056 LisboaPortugal

Epidemiological studies have reported an increased risk of Parkinson’s disease(PD)development in amphetamine-type stimulant users during their lifetime(Garwood et al.,2006;Rumpf et al.,2017).Protein inclusions mainly composed of misfolded and aggregatedα-synuclein are the pathological hallmark of PD and other disorders known as *** studies present evidence that amphetamine upregulatesα-synuclein synthesis in substantia *** increment ofα-synuclein levels promotes its aggregation and amyloid fibril formation,increasing reactive oxygen species(ROS),and consequently dopamine oxidation(Wang and Witt,2014),known to be toxic for dopaminergic neurons involved in motor function and limbicmotor *** the years,these damaged cells lose their functionality and may die precociously,depleting the reserve of neural cells necessary for the normal neurological function which contributes to the onset of PD,when a critical number of cells are lost(Garwood et al.,2006).Therefore,the use of amphetamine-type stimulants may be a trigger event in the development of PD and parkinsonism,in conjugation to other risk factors that a given individual may *** the evidence,a previous study suggests that there is not enough data to corroborate the loss of dopamine neurons due to human amphetamine-type stimulant exposure,and consequently its implication in the PD development(Kish et al.,2017).

关键词： driving increment lifetime

Permanence of Lung Disorders after Hospital Discharge of Patients Who Underwent Cardiac Surgery: An Integrative Review

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Health 2020年第2期12卷 194-203页

作者： Daniela Di Bernardi Marcos Bagrichevsky Christiani decker Batista Bonin Instituto de ensino superior (IES) Florianópolis Brasil departmento de Medicina Universidade Regional de Blumenau (FURB) Blumenau Brasil

Patients are more likely to develop lung disorders after cardiac surgery. Pulmonary dysfunction resulting from cardiac surgery in the hospital phase is well documented. However, there is a scarcity of studies related to the permanence of pulmonary disorders in the period following hospital discharge. The objective of this study was to verify in a database investigation the permanence of pulmonary dysfunctions after hospital discharge of patients who underwent cardiac surgery. A literature review with an integrative approach was carried out in the National Library of Medicine (Pubmed) and Scientific Electronic Library Online (Scielo) databases from 1978 to 2019. 4523 articles were found and after applying the inclusion and exclusion criteria, the sample was composed of 14 articles relevant to the subject and that were available in full. The results demonstrated the presence of atelectasis, pleural effusion, diaphragmatic dysfunction, respiratory symptoms such as cough, phlegm, wheezing, and dyspnea, reduced static and dynamic lung volumes, reduced diffusion capacity and respiratory muscle strength, in the period that ranged from three weeks to one year after cardiac surgery. Further studies are needed to elucidate the mechanisms that lead to the permanence of pulmonary dysfunctions after hospital discharge in patients who underwent cardiac surgery.

关键词： Thoracic Surgery Cardiac Surgery Pulmonary Function Test Respiratory Function Tests

Uniformity of Precipitation and Radial Profile of the Super 10 Sprinkler at Different Operating Pressures

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Journal of Water Resource and Protection 2014年第11期6卷 951-960页

作者： Paulo Eduardo S.Martins Elcides R.da Silva Juan Gabriel C.L.Ruiz Gustavo R.Barbosa Jose Renato Zanini Marcilio V.Martins Filho Centro Universitário de Patos de Minas Patos de MinasBrazil Instituto Taquaritinguense de ensino superior TaquaritingaBrazil Sao Paulo State University JaboticabalBrazil

The study aimed to evaluate the effect of operating parameters of the sprinkler Super 10, manufactured by NaanDanJain, with green, yellow and blue nozzles on the hydraulic characterization, so that this information can contribute to a better dimensioning of systems and management of irrigated areas. For the determination of UC and UD the radial method was used and with the aid of computer application CATCH 3D the overlapping of water slides with ten spacings was calculated. The results demonstrate that the mechanism used for the fractionation of the water jet of sprinkler Super 10 is efficient because it presented good uniformity of water distribution and low amplitude of precipitation. For high uniformity of distribution of water in the larger wetting radii, it is recommended to work with Super 10 sprinkler using the green nozzle, with a pressure of 40 mH2O and spacing between sprinklers and lateral lines 12 × 12 m.

关键词： Hydraulic Performance Uniformity Irrigation Water Distribution Profile

The neuroprotective effect of traditional Chinese medicinal plants--A critical review

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Acta Pharmaceutica Sinica B 2023年第8期13卷 3208-3237页

作者： Joao Moreira Mariana Machado Monica Dias-Teixeira Ricardo Ferraz Cristina delerue-Matos Clara Grosso REQUIMTE/LAQV Instituto Superior de Engenharia do PortoInstituto Politecnico do PortoPorto 4249-015Portugal Ciencias Químicas e das Biomoleculas/CISA Escola Superior de SaudedInstituto Politecnico do PortoPorto 4200-072Portugal NICiTeS-Nucleo de Investigacao em Ciencias e Tecnologias da Saude Escola Superior de Saude Ribeiro SanchesLisboa 1950-396Portugal REQUIMTE/LAQV Departamento de Química e Bioquímica Faculdade de CienciasUniversidade do PortoPorto 4169-007Portugal

Neurodegenerative and neuropsychiatric diseases are increasingly affecting individuals’quality of life,thus increasing their cost to social and health *** diseases have overlapping mechanisms,such as oxidative stress,protein aggregation,neuroinflammation,neurotransmission impairment,mitochondrial dysfunction,and ***,there is no cure for neurodegenerative diseases,and the available therapies have adverse effects and low *** neuropsychiatric disorders,such as depression,the current therapies are not adequate to one-third of the patients,the so-called treatmentresistant ***,searching for new treatments is *** plants appear as a strong alternative and complement towards new treatment protocols,as they have been used for health purposes for thousands of ***,the main goal of this review is to revisit the neuroprotective potential of some of the most predominant medicinal plants(and one fungus)used in traditional Chinese medicine(TCM),focusing on their proven mechanisms of action and their chemical compositions,to give clues on how they can be useful against neurodegeneration progression.

关键词： Neurodegeneration Alzheimer's disease Parkinson's disease depression Medicinal plants Oxidative stress Toxicology Clinicaltrials

Evidence for further charmonium vector resonances

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Chinese Physics C 2011年第4期35卷 319-324页

作者： Eef van Beveren George Rupp Centro de Física Computacional departamento de Física Universidade de Coimbra Centro de Física das Interaccoes Fundamentais Instituto superior Tèecnico Universidade Tèecnica de Lisboa Edifício Ciêencia

We discuss the shape of threshold signals in production cross sections of the reaction e＋e- → D＊ Dˉ＊, at the opening of the Ds＊ Dˉs＊ and Λc＋ Λ＋c channels. Furthermore, evidence for the ψ（3D）, ψ（5S）, ψ（4D）, ψ（6S）, ψ（5D）, ψ（7S）, ψ（6D）, and ψ（8S） new charmonium vector resonances is presented, on the basis of data recently published by the BABAR Collaboration. Central masses and resonance widths are estimated. Confirmation of these resonances would be a huge step in lifting the precision level of hadron spectroscopy towards that of atomic spectroscopy, with far-reaching consequences for theory.

关键词： heavy quarkonia hadron production in electron-positron annihilation

Can morphological and behavioral traits predict the foraging and feeding dynamics of social arachnids?

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Current Zoology 2021年第2期67卷 183-190页

作者： Renan F.MOURA Everton TIZO-PEDROSO Kleber deL-CLARO Laboratório de Ecologia Comportamental e de Interaçōes Instituto de BiologiaUniversidade Federal de UberlândiaUberlândiaMG38402-020Brazil Centro de ensino e Aprendizado em Rede Universidade Estadual de GoiásAnápolisGO75123-315Brazil

Complex social insect species exhibit task specialization mediated by morphological and behavior-al ***,evidence of such traits is scarce for other social *** investigated whether the social pseudoscorpion Paratemnoides nidificator exhibits morphologically and behav-iorally specialized individuals in prey *** measured body and chela sizes of adult pseudo-scorpions and analyzed predation *** individuals spent more time moving through the colony and foraging than smaller *** that captured prey had increased body and absolute chelae *** larger individuals had relatively small chelae size,they showed a higher probability of prey *** individuals manipulated prey often,although they fed less than smaller *** that initiated captures fed more frequently and for more time than the *** selection might be favoring individuals speci-alized in foraging and colony protection,allowing smaller and less efficient adults to avoid contact with dangerous *** our knowledge,there is incipient information regarding specialized indi-viduals in arachnids,and our results might indicate the emergence of a morphologically special-ized group in this species.

关键词： altruistic species behavioral ecology cooperative species morphological specialization Pseudoscorpiones social arachnids

Mechanisms associated with winter intraseasonal extreme sea ice extent in the Weddell Sea

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Advances in Polar Science 2017年第3期28卷 171-184页

作者： Fabio Ullmann Furtado de LIMA Leila M.V.CARVALHO Centro de ensino superior da Foz do Itajaí-Univ. do Estado de Santa Catarina (UdeSC) dept.of Geography and Earth Research Institute University of California Santa Barbara

Previous studies have shown evidence of atmospheric extratropical wave trains modulating sea ice area in the Weddell and Amundsen/Bellingshausen seas on intraseasonal time-scales(20–100 d). Here we investigate mechanisms relating intraseasonal extreme sea ice extent and Ekman layer dynamics with emphasis on the Weddell Sea. This study extends from 1989 to 2013 and focuses on the winter season. Wind stress τ is calculated with winds from the Climate Forecast System reanalysis(CFSR) to evaluate momentum transfer between the atmosphere and the Ekman layer. Lag-composites of the anomalies of Ekman transport and the Ekman pumping indicate that divergence of mass in the Ekman layer and upwelling lead the occurrence of extreme sea ice contraction on intraseasonal time-scales in the Weddell Sea. Opposite conditions(i.e., convergence of the mass and downwelling) lead extreme sea ice expansion on intraseasonal time-scales. This study suggests that the Ekman pumping resulting from the anomalous wind stress on intraseasonal time-scales can transport these warmer waters to the surface contributing to sea ice melting. Additionally, high resolution sea ice fraction and ocean currents obtained from satellite and in situ data are used to investigate in detail mechanisms associated with persistent extreme sea ice expansion and contraction on intraseasonal time-scales. These case studies reveal that atmospheric circumpolar waves on intraseasonal time-scales can induce contrasting anomalies of about ±20% in sea ice concentration at the Weddell and western Antarctica Peninsula margins within less than 30 d. This study shows that extreme anomalies in sea ice may lag between 5–25 d(1–5 pentads) the ocean-atmospheric forcing on intraseasonal time-scales.

关键词： sea ice extent intraseasonal time-scales Ekman layer dynamics

The spindle assembly checkpoint:perspectives in tumorigenesis and cancer therapy

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Frontiers in Biology 2011年第2期6卷 147-155页

作者： Joana BARBOSA Ana Vanessa NASCIMENTO Juliana FARIA Patrícia SILVA Hassan BOUSBAA Centro de Investigação em Ciências da Saúde(CICS) Instituto Superior de Ciências da Saúde-NorteCESPURua Central de Gandra13174585-116 Gandra PRDPortugal

Loss or gain of chromosomes,a condition known as aneuploidy,is a common feature of tumor cells and has therefore been proposed as the driving force for *** chromosomal instability can arise during mitosis as a result of mis-segregation of the duplicated sister chromatids to the two daughter *** normal cells,missegregation is usually prevented by the spindle assembly checkpoint(SAC),a sophisticated surveillance mechanism that inhibits mitotic exit until all chromosomes have successfully achieved bipolar attachment to spindle *** abrogation of SAC activity is lethal to normal as well as to tumor cells,as a consequence of massive chromosome ***,many human aneuploid tumor cells exhibit a weakened SAC activity that allows them to tolerate gains or losses of a small number of chromosomes;and interfering with this SAC residual activity may constitute a suitable strategy to kill cancer *** review focuses on the potential link between SAC and tumorigenesis,and the therapeutic strategy to target the SAC for cancer treatment.

关键词： spindle assembly checkpoint mitosis chromosome instability tumor cancer therapy