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Tribologically induced nanostructural evolution of carbon materials: A new perspective

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Friction 2024年第1期12卷 144-163页

作者： guilherme oliveira NEVES Nicolás ARAYA Diego Berti SALVARO Thiago de Souza LAMIM Renan Oss GIACOMELLI Cristiano BINdeR Aloisio Nelmo KLEIN JoséDaniel Biasoli de MELLO Laboratório de Materiais Universidade Federal de Santa CatarinaSanta Catarina 88040-900Brazil departamento de Ingeniería Mecánica Facultad de IngenieríaUniversidad del Bío-BíoConcepcion 4070-386Chile Universidad de Concepción Concepcion 4070-386Chile SENAI Innovation Institute for Laser Processing Santa Catarina 89218-153Brazil Universidade Federal de Uberlândia Minas Gerais 38408-100Brazil

Carbon-based solid lubricants are excellent options to reduce friction and wear,especially with the carbon capability to adopt different allotropes *** the macroscale,these materials are sheared on the contact along with debris and contaminants to form tribolayers that govern the tribosystem *** a recently developed advanced Raman analysis on the tribolayers,it was possible to quantify the contactinduced defects in the crystalline structure of a wide range of allotropes of carbon-based solid lubricants,from graphite and carbide-derived carbon particles to multi-layer graphene and carbon *** addition,these materials were tested under various dry sliding conditions,with different geometries,topographies,and solid-lubricant application *** of the initial tribosystem conditions and allotrope level of atomic ordering,there is a remarkable trend of increasing the point and line defects density until a specific saturation limit in the same order of magnitude for all the materials tested.

关键词： carbon nanostructures tribology Raman spectroscopy defects quantification tribolayer solid lubrication

New avenues for the treatment of immunotherapy-resistant pancreatic cancer

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1134-1153页

作者： Luis guilherme de oliveira Silva Fabian Fellipe Bueno Lemos Marcel Silva Luz Samuel Luca Rocha Pinheiro Mariana dos Santos Calmon Gabriel Lima Correa Santos Gabriel Reis Rocha Fabrício Freire de Melo Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil

Pancreatic cancer(PC)is characterized by its extremely aggressive nature and ranks 14th in the number of new cancer cases ***,due to its complexity,it ranks 7th in the list of the most lethal cancers *** pathogenesis of PC involves several complex processes,including familial genetic factors associated with risk factors such as obesity,diabetes mellitus,chronic pancreatitis,and *** in genes such as KRAS,TP53,and SMAD4 are linked to the appearance of malignant cells that generate pancreatic lesions and,consequently,*** this context,some therapies are used for PC,one of which is immunotherapy,which is extremely promising in various other types of cancer but has shown little response in the treatment of PC due to various resistance mechanisms that contribute to a drop in immunotherapy *** is therefore clear that the tumor microenvironment(TME)has a huge impact on the resistance process,since cellular and non-cellular elements create an immunosuppressive environment,characterized by a dense desmoplastic stroma with cancerassociated fibroblasts,pancreatic stellate cells,extracellular matrix,and immunosuppressive *** to this are genetic mutations in TP53 and immunosuppressive factors that act on T cells,resulting in a shortage of CD8+T cells and limited expression of activation markers such as *** this way,finding new strategies that make it possible to manipulate resistance mechanisms is ***,techniques such as the use of TME modulators that block receptors and stromal molecules that generate resistance,the use of genetic manipulation in specific regions,such as microRNAs,the modulation of extrinsic and intrinsic factors associated with T cells,and,above all,therapeutic models that combine these modulation techniques constitute the promising future of PC ***,this study aims to elucidate the main mechanisms of resistance to immunotherapy in PC and new ways of manipulating thi

关键词： Pancreatic cancer Immunotherapy Resistance Tumor microenvironment manipulation Combined immunotherapy

Influence of biological maturation on cardiac autonomic recovery in female volleyball players during&after repeated sprints training:An experimental trial

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Sports Medicine and Health Science 2024年第3期6卷 279-286页

作者： Paulo Francisco de Almeida-Neto Fernanda Cristina Silva de oliveira Jose Marcondes de oliveira-Júnior Júlio Cesar Medeiros Alves Matheus de Lima Rocha Iago Medeiros da Silva Roberto Felipe C^amara Rocha Paulo Moreira Silva Dantas Breno guilherme de Araújo Tin^oco Cabral Health Sciences Center Federal University of Rio Grande do NorteCCS-UFRNNatal59012-570RNBrazil department of Physical Education Federal University of Rio Grande do NorteDEF-UFRNNatal59078-970RNBrazil

Previously,it was suggested that biological maturation(BM)could be linked to cardiac autonomic recovery(CAR)in the pediatric ***,this influence hasn’t been confirmed *** aim was to investigate the impact of BM on CAR in female volleyball *** study with a sample of 38 volleyball players,comprising 20 girls(age:[11.62.1]years)and 18 women(age:[24.55.5]years),we analyzed BM,comparing maturing subjects(girls)with mature subjects(women).Additionally,we assessed peak height velocity(PHV)in *** conducted a training session involving repeated sprints(3 rounds of 6 sprints interspersed by 5 min[min]of passive rest).Using short-range radio telemetry,we analyzed CAR during(at the end of the 1st and 2nd rounds)and after(following the 3rd round)the training session of repeated sprints by applying the 60-s to 300-s heart rate recovery index(HRR-Index).Girls exhibited superior CAR compared to women(round 2:60-s,120-s,240-s,and 300-s,pdemonstrated superior CAR compared to those in the Early-PHV and During-PHV groups.(60-s to 300-s,η2p>0.4,p0.4,pded that biological maturation has a significant impact on cardiac autonomic recovery.

关键词： Exercise Sport Volleyball Heart rate Pediatric

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

Immune pathway through endometriosis to ovarian cancer

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World Journal of Clinical Oncology 2024年第4期15卷 496-522页

作者： Mariana Santos Calmon Fabian Fellipe Bueno Lemos Marcel Silva Luz Samuel Luca Rocha Pinheiro Luis guilherme de oliveira Silva Gabriel Lima Correa Santos Gabriel Reis Rocha Fabrício Freire de Melo Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil

Endometriosis is an estrogen-dependent inflammatory disease,defined by the presence of functional endometrial tissue outside of the uterine *** disease is one of the main gynecological diseases,affecting around 10%-15%women and girls of reproductive age,being a common gynecologic *** endometriosis is a benign disease,it shares several characteristics with invasive *** support that it has been linked with an increased chance of developing endometrial ovarian cancer,representing an earlier stage of neoplastic *** is particularly true for women with clear cell carcinoma,low-grade serous carcinoma and ***,the carcinogenic pathways between both pathologies remain poorly *** studies suggest a connection between endometriosis and endometriosis-associated ovarian cancers(EAOCs)via pathways associated with oxidative stress,inflammation,and *** article aims to review current data on the molecular events linked to the development of EAOCs from endometriosis,specifically focusing on the complex relationship between the immune response to endometriosis and cancer,including the molecular mechanisms and their *** recent developments in immunotherapy and their potential to boost the effectiveness of future treatments.

关键词： Ovarian neoplasms Endometriosis Endometriosis-associated ovarian cancers Immune response Immunotherapy

Human occupation explains species invasion better than biotic stability:evaluating Artocarpus heterophyllus Lam.(Moraceae;jackfruit)invasion in the Neotropics

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Journal of Plant Ecology 2018年第3期11卷 465-474页

作者： guilherme de oliveira Laboratório de Biogeografia da Conservação Universidade Federal do Recôncavo da Bahia(UFRB)Centro de Ciências AgráriasAmbientais e Biológicas(CCAAB)Setor de Ciências BiológicasRua Rui Barbosa 710Centro 44380-000Cruz das AlmasBahiaBrasil

Aims Biological invasions are recognized to put native species in risk of *** this study,I tested whether the invasion of Artocarpus heterophyllus Lam.(Moraceae;jackfruit)in the Neotropics was explained by its biotic stability,an intrinsic force,or by human occupation,an extrinsic *** I used an ensemble framework combining 12 ecological niche models(ENMs)and 4 atmosphere-ocean general circulation *** were constructed for the pre-industrial time period in the Indo-Malaya biogeographic region,the native habitat of ***,and were then projected to past(last glacial maximum,21000 years ago and mid-Holocene,6000 years ago)and future(end of century,2080)*** ENMs were used to establish the biotic stability of ***-phyllus in areas where it was predicted to be present concomitantly within these four time *** biotic stability was projected onto the Neotropics,and then I used a null model and logistic regression to test what the main driver of *** *** Findings In general,the presence of *** in the Neotropics was not explained by biotic stability,tested by the null ***,human occupation explained much of its presence in the invaded habitat,once all standardized coefficients related to this driver was significant positive in the logistic *** on these results,humans sustained the presence of ***-erophyllus in the Neotropics,probably because of the additive influences of propagule pressure and habitat ***,the recommendation is that the cultivation of *** in the Neotropics must be regulated and supervised,primarily near reserve areas.

关键词： ecological niche models(ENMs) ensemble forecasting climate change habitat disturbance propagule pressure

dehydrated Natural Feed for Cats: Influence on Apparent Digestibility Coefficient, Feces Scores, and Serum Immune, Antioxidant, and Metabolic Biomarkers

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Food and Nutrition Sciences 2024年第7期15卷 594-611页

作者： Bruno Giorgio de oliveira Cécere guilherme Luiz deolindo Bianca F. Bissacotti Priscila Marquezin Copetti Maria Rosa Chitolina Schetinger Bruna Klein Matheus delamea Baldissera Thiago Pereira Ribeiro Walter Hugo Cuelho Suarez Daniel Pigatto Monteiro Aleksandro Schafer Da Silva Graduate Multicenter Program in Biochemistry and Molecular Biology University of the State of Santa Catarina Lages Brazil department of Biochemistry and Molecular Biology Universidade Federal de Santa Maria (UFSM) Santa Maria Brazil department of Animal Science Universidade Federal de Santa Maria (UFSM) Chapec Brazil department of Health Science Universidade Franciscana (UFN) Santa Maria Brazil department of Animal Nutrition Tectron-Tecnologia e Inovao Toledo Brazil

The present study aimed to determine whether natural dehydrated feed (DNF) can replace dry extruded feed while preserving the required daily intake, nutrient digestibility and benefits for immunity and antioxidant response in cats. The animals were divided into two groups of seven animals each. One group received DNF, and the other consumed commercial extruded dry feed (DCF). The experiment lasted 45 days and we measured daily consumption and collected blood and feces samples. The animals in the DNF group showed greater digestibility of fiber and mineral matter than DCF. Cats in the DNF group had a higher volume of feces. DNF cats had lower leukocyte and granulocyte counts and cholesterol levels. Serum enzymatic antioxidant responses and non-enzymatic were higher in DNF cats. Cats in the DNF group showed lower serum acute phase proteins in addition to a tendency toward a higher concentration of transferrin than in the DCF group. Fecal Escherichia coli and total coliform counts of cats fed DNF were higher than DCF. We conclude that the daily consumption of cats is adequate. This feed had greater digestibility of fiber and mineral matter, in addition to an improvement in antioxidant and immunological responses.

关键词： Alternative Feed Antioxidant Companion Animals Health

Effects of Soluble Silicate and Nanosilica Application on Rice Nutrition in an Oxisol

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Pedosphere 2018年第4期28卷 597-606页

作者： Rita de Cassia FELIX ALVAREZ Renato de Mello PRADO guilherme FELISBERTO Angelica Cristina FERNANdeS deUS Raimundo Leonardo LIMA de oliveira Federal University of Mato Grosso do Sul Chapadao do Sul 79560-000 (Brazil) University of the State of Sao Paulo UNESP School of Agronomic Sciences Department of Soils and Fertilizers Jaboticabal 14884-900 (Brazil)

Silicon （Si） has been supplied to plants via application of calcium silicate to soil; however, high doses of calcium silicate are required because of its low solubility. Nanoparticles can reduce Si doses and be applied to seeding furrows. This study investigated the effects of liquid Si sources, i.e., highly soluble silicate （115.2 g L^-1 Si and 60.5 g L^-1 Na20） and nanosilica （〈 200 nm）, on Si uptake by rice plants, plant lignification, plant C：N：P stoichiometry, plant physiology, and grain yield using an Oxisol under greanhouse condistions. The treatments included the application of nanosilica and soluble silicate to seeding furrows at Si doses of 0, 605, 1210, and 2 420 g ha^-1. Plant uptake and treatment effects were evaluated by measuring C and lignin contents, Si, N, and P accumulation, physiological characteristics, and grain yield of rice. The deposition of silica bodies and amorphous silica in the flag leaves was analyzed using scanning electron microscopy. Application of liquid Si increased Si accumulation in rice by 47.3% in relation to the control （0 g ha^-1 Si）, regardless of the Si sources used. Nanosilica application increased leaf lignin content by 112.7% when compared to that in the control. Silicon moderately affected the net C assimilation （increased by 1.83%） and transpiration rates （increased by 48.3%）; however, Si influenced neither plant growth nor grain yield of rice. These results are explained by the lack of biotic or abiotic stress in rice plants during the experiment. To the best of our knowledge, in Brazilian agriculture, this is the first report on the use of nanosilica as a Si fertilizer and its effect on plant nutrition. This study provides evidence that rice plants absorb and accumulate nanoparticles; however, further studies are required to investigate the use of nanoparticles in other plant species.

关键词： C:N:P stoichiometry grain yield leaf lignin net C assimilation plant physiology silicon source

The role of environmental temperature on movement patterns of giant anteaters

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Integrative Zoology 2022年第2期17卷 285-296页

作者： Aline GIROUX Zaida ORTEGA Alessandra BERTASSONI Arnaud Léonard Jean deSBIEZ Danilo KLUYBER Gabriel Favero MASSOCATO guilherme de MIRANDA guilherme MOURÃO Luciana SURITA Nina ATTIAS Rita de Cassia BIANCHI Vinícius Peron de oliveira GASPAROTTO Luiz Gustavo Rodrigues oliveira-SANTOS Ecology department Federal University of Mato Grosso do Sul(UFMS)Campo GrandeMato Grosso do SulBrazil Post Graduate Program of Ecology and Evolution Federal University of Goiás(UFG)GoiâniaGoiásBrazil Institute of Research and Conservation of Anteaters in Brazil(PROJETO TAMANDUÁ) ParnaíbaPiauíBrazil Institute for the Conservation of Wild Animals(ICAS) Campo GrandeMato Grosso do SulBrazil Royal Zoological Society of Scotland(RZSS) MurrayfieldEdinburghUK Institute for Ecological Research(IPÊ) NazaréPaulistaSão PauloBrazil Naples Zoo at Caribbean Gardens NaplesFloridaUSA The Houston Zoo HoustonTexasUSA National Institute of Criminalistics-Federal Police BrasíliaBrazil Embrapa Pantanal CorumbáMato Grosso do SulBrazil Natural Resources Graduate Program(PRONAT)-Federal University of Roraima(UFRR) Boa VistaRoraimaBrazil Animal Biology Graduate Program Federal University of Mato Grosso do Sul(UFMS)Campo GrandeMato Grosso do SulBrazil Animal Biology department São Paulo State University(UNESP)São Josédo Rio PretoSão PauloBrazil department of Preventive Veterinary Medicine and Animal Health School of Veterinary MedicineUniversity of São Paulo(USP)São PauloSPBrazil Brazilian Institute for Conservation Medicine(TRÍAde) RecifePernambucoBrazil

Mammals can show conspicuous behavioral responses to thermal variation,including changes in movement *** used an integrative approach to understand how environmental temperature can drive the movement behavior of a mammal with low capacity for physiological thermoregulation,the giant anteater(Myrmecophaga tridactyla).We tracked 52 giant anteaters in 7 areas throughout the Brazilian *** estimated the distance moved,area used,use of forest areas,and mean environmental temperature for each monitoring day of each *** modeled these data with Mixed Structural Equations—considering the possible interactions between our variables and controlling for sex and body *** anteaters reduced displacement and increased forest use with decreasing environmental temperature,probably because of their low body heat *** is possible that they reduce distance moved and area used by reducing the duration of *** decreasing temperature,forest habitats become warmer than open ones,besides buffer rain and chilly *** displacement and using forests are important strategies to reduce body heat loss and the energetic costs of ***,decreasing movement can limit food access and,consequently,***,we highlight the importance of forests as thermal *** increasing frequency and intensity of extreme weather events,we showed the need to preserve forest patches to offer suitable conditions for tropical mammals’behavioral *** this context,policies favoring deforestation on Brazilian territory are especially ***,we emphasize the need of integrative approaches to understand the complex interactions between organisms and the environment.

关键词： behavioral thermoregulation biologging habitat use mixed structural equations movement ecology