LIVIVO - Das Suchportal für Lebenswissenschaften

switch to English language
Erweiterte Suche

Suchergebnis

Treffer 1 - 10 von insgesamt 44

Suchoptionen

  1. Artikel: Thermodynamic assessment of a small-scale solar chimney

    Maia, Cristiana Brasil / Castro Silva, Janaína de Oliveira

    Renewable energy. 2022 Mar., v. 186

    2022  

    Abstract: In recent decades, the world is facing significant global population growth, leading to an energy use intensification. Due to the depletion of global energy resources, renewable sources can be used to replace or enhance conventional sources. Solar energy ...

    Abstract In recent decades, the world is facing significant global population growth, leading to an energy use intensification. Due to the depletion of global energy resources, renewable sources can be used to replace or enhance conventional sources. Solar energy is a non-polluting and inexhaustible energy source. The solar chimney uses solar energy to heat the air and generate an updraft airflow, which can be used for electricity generation or agricultural drying. Most models from the literature predict the steady-state airflow parameters using fixed values for ambient temperature and solar radiation, or unsteady analysis using experimental data. In this paper, a comprehensive assessment of the unsteady airflow inside a small-scale prototype is presented. A mathematical model is used to predict the mass flowrate and the temperatures of the airflow throughout a year, on an hourly basis, and the results showed a good agreement with experimental data obtained in a small prototype. The performance of the system was evaluated, with a maximum exergy efficiency of 11%. The low energy and exergy efficiencies were mainly attributed to the small dimensions of the prototype.
    Schlagwörter air ; air flow ; ambient temperature ; electricity generation ; exergy ; mathematical models ; population growth ; prototypes ; solar chimneys ; solar energy ; solar radiation
    Sprache Englisch
    Erscheinungsverlauf 2022-03
    Umfang p. 35-50.
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel
    ZDB-ID 2001449-1
    ISSN 1879-0682 ; 0960-1481
    ISSN (online) 1879-0682
    ISSN 0960-1481
    DOI 10.1016/j.renene.2021.12.128
    Datenquelle NAL Katalog (AGRICOLA)

    Volltext online

    Zusatzmaterialien

    Kategorien

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

  2. Artikel ; Online: Sindicalismo, reestruturação produtiva e capitalismo financeiro no Brasil

    JANAÍNA DE OLIVEIRA / MARIA CHAVES JARDIM / SIDNEY JARD DA SILVA

    Brazilian Journal of Political Economy, Vol 41, Iss 2, Pp 426-

    2021  Band 443

    Abstract: RESUMO O artigo se situa no âmbito das discussões contemporâneas que desafiam a sociologia econômica e a sociologia do trabalho a refletir sobre um novo fenômeno socioeconômico: a chegada de sindicalistas no mercado financeiro, via criação e, sobretudo, ... ...

    Abstract RESUMO O artigo se situa no âmbito das discussões contemporâneas que desafiam a sociologia econômica e a sociologia do trabalho a refletir sobre um novo fenômeno socioeconômico: a chegada de sindicalistas no mercado financeiro, via criação e, sobretudo, a gestão de fundos de pensão. Atores sociais da construção deste novo fenômeno financeiro, os sindicalistas passam a (re)significar não somente suas estratégias, mas também seus discursos, agregando questões morais e sociais aos interesses do mercado. O trabalho demonstra que o novo éthos do sindicalismo brasileiro busca utilizar a própria lógica do capital na resistência contra a financeirização da economia e a reestruturação produtiva.
    Schlagwörter Capitalismo financeiro ; fundos de pensão ; sindicato ; reestruturação produtiva ; Economics as a science ; HB71-74
    Sprache Englisch
    Erscheinungsdatum 2021-03-01T00:00:00Z
    Verlag Editora 34
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

    Zusatzmaterialien

    Kategorien

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

  3. Artikel ; Online: Immune system cells modulation in patients with reproductive issues: A systematic review approach.

    Moura, Gabriel Acácio de / Rocha, Yasmim Mendes / Moura, Francisca Lariza Damascieira / Freitas, Janaína de Oliveira / Rodrigues, João Pedro Viana / Gonçalves, Vanessa Pinheiro / Nicolete, Roberto

    JBRA assisted reproduction

    2024  Band 28, Heft 1, Seite(n) 78–89

    Abstract: The aim of this study was to carry out a systematic literature review to investigate the main immune cells responsible for implantation failures. We selected papers from PubMed, Embase and Virtual Health Library databases. Eligible articles included ... ...

    Abstract The aim of this study was to carry out a systematic literature review to investigate the main immune cells responsible for implantation failures. We selected papers from PubMed, Embase and Virtual Health Library databases. Eligible articles included publications between January 1, 2010 and April 24, 2022. Inclusion criteria were: observational and case-control studies; and the exclusion criteria were: review papers, letters to the editor, abstracts, animal studies and case reports. We extracted the following information: day of collection, number of patients, control group, age of patients, type of sample used, immune cells and cytokines. As main findings in our mapping, we found that in peripheral blood, CD3+, CD4+, CD8+, CD16+, CD56+, CD57+, CD69+, CD154+, CD158a+, NKp46 cells were increased and the CD4+, CD45+, Foxp3 and NKp46 markers were reduced. From the endometrial biopsies, there was an increase in CD3+, CD4+, CD5+, CD8+, CD16+, CD25+, CD45+, CD56+, CD57+, CD68+, CD127+ and a reduction in CD45+, CD56+, NKp46 and FoxP3 cells. Cytokines found increased in peripheral blood included IL-6, IL-10, IL-17, INF-γ, TGF-ß, TNF-α; while IL-4, IL-6, IL-10, IL-35, FoxP3, TGF-ß, SOCS3 were reduced. As for the biopsies, there was an increase in IL-2, IL-6, IL-17, IL-22, IL-23, INF-A1, INF-B1, INF-γ, TNF-R and a reduction in IL-6, IL-10, INF-γ, TGFß, TNF-α. We concluded that immune cells can be modulated during pregnancy failure, but further studies are needed to elucidate the modulating effect of the immune system on the endometrium of these patients.
    Mesh-Begriff(e) Pregnancy ; Female ; Humans ; Interleukin-10 ; Interleukin-17 ; Interleukin-6 ; Tumor Necrosis Factor-alpha ; Flow Cytometry ; Cytokines ; Immune System ; Forkhead Transcription Factors
    Chemische Substanzen Interleukin-10 (130068-27-8) ; Interleukin-17 ; Interleukin-6 ; Tumor Necrosis Factor-alpha ; Cytokines ; Forkhead Transcription Factors
    Sprache Englisch
    Erscheinungsdatum 2024-02-26
    Erscheinungsland Brazil
    Dokumenttyp Systematic Review ; Journal Article ; Review
    ZDB-ID 2856226-4
    ISSN 1518-0557 ; 1517-5693
    ISSN (online) 1518-0557
    ISSN 1517-5693
    DOI 10.5935/1518-0557.20230044
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

  4. Artikel ; Online: O desenvolvimento das Ciências Sociais e a modernização brasileira

    Natalia Maria Casagrande / Janaina de Oliveira

    Revista Sem Aspas, Vol 8, Iss

    2019  Band 2

    Abstract: A intelectualidade vivencia uma ruptura com os padrões de consagração vigentes na Primeira República. A partir da tomada do poder por Getúlio Vargas e a Revolução de 1930, tem-se início um novo cenário político. Devido à queda do preço do café, o modelo ... ...

    Abstract A intelectualidade vivencia uma ruptura com os padrões de consagração vigentes na Primeira República. A partir da tomada do poder por Getúlio Vargas e a Revolução de 1930, tem-se início um novo cenário político. Devido à queda do preço do café, o modelo agroexportador encontrava-se em processo de decadência, pois já não era mais possível manter artificialmente o valor deste produto. Somam-se a este fator as restrições provocadas pela crise financeira de 1929, o que implicou na queda da demanda externa e no surgimento de novos competidores. Neste contexto, os intelectuais estão subordinados de um modo mais intenso à conjuntura política do que propriamente às questões culturais. A função e atuação dos intelectuais ultrapassam, desta maneira, o campo estritamente intelectual e adentram o do político. Assim, o presente trabalho tem como objetivo demonstrar a relação entre a modernização brasileira e o desenvolvimento institucional e intelectual das Ciências Sociais no Brasil.
    Schlagwörter Modernização ; Ciências Sociais ; Intelectuais ; Institucionalização ; Sociology (General) ; HM401-1281 ; Social sciences (General) ; H1-99
    Sprache Portugiesisch
    Erscheinungsdatum 2019-12-01T00:00:00Z
    Verlag Universidade Estadual Paulista
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

    Zusatzmaterialien

    Kategorien

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

  5. Artikel ; Online: “Das minas de ouro e das montanhas gerais”

    Janaina de Oliveira Campos / Rennan Lanna Martins Mafra

    Lumina, Vol 12, Iss

    a representação do Terra de Minas sobre a identidade mineira

    2018  Band 2

    Abstract: Este trabalho trata da representação da identidade mineira no âmbito do programa Terra de Minas, da Rede Globo. Como arcabouço teórico, lança mão de teorias da representação social para compreender as interrelações entre mineiridade e meio rural. Como ... ...

    Abstract Este trabalho trata da representação da identidade mineira no âmbito do programa Terra de Minas, da Rede Globo. Como arcabouço teórico, lança mão de teorias da representação social para compreender as interrelações entre mineiridade e meio rural. Como escopo metodológico, utiliza a análise de conteúdo para identificar, em algumas edições do programa, traços característicos da mineiridade que remetam ao rural. Os principais resultados da pesquisa apontam que o programa cumpre papel de representar o sujeito mineiro que foi constrído com referência à ruralidade, acrescida, todavia, de combinações com outros aspectos da contemporaneidade, ligados à culinária, à natureza, à história e a uma impressão idealizada do ser mineiro.
    Schlagwörter representação ; identidade ; mídia ; mineiridade ; Communication. Mass media ; P87-96 ; Social sciences (General) ; H1-99
    Sprache Portugiesisch
    Erscheinungsdatum 2018-08-01T00:00:00Z
    Verlag Universidade Federal de Juiz de Fora
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

    Zusatzmaterialien

    Kategorien

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

  6. Artikel ; Online: Obesity as an additional factor for autonomic imbalance and poor sleep behavior in chronic obstructive pulmonary disease: a case-control study.

    Mostarda, Cristiano / Barboza, Catarina de Andrade / Cutrim, Ana Lídia / Silva-Filho, Antonio Carlos / Dias, Carlos José / Brito-Monzani, Janaina De Oliveira / Rodrigues, Bruno

    Clinics (Sao Paulo, Brazil)

    2021  Band 76, Seite(n) e1826

    Abstract: Objectives: We compared the autonomic modulation and sleep behavior of eutrophic and overweight patients with chronic obstructive pulmonary disease (COPD).: Methods: COPD participants were divided into the overweight and eutrophic groups. Pulmonary ... ...

    Abstract Objectives: We compared the autonomic modulation and sleep behavior of eutrophic and overweight patients with chronic obstructive pulmonary disease (COPD).
    Methods: COPD participants were divided into the overweight and eutrophic groups. Pulmonary function, blood pressure, body composition, autonomic modulation, and the Pittsburgh Sleep Quality Index score were assessed. Participants performed the six-minute walk test for functional assessment.
    Results: Spirometric variables obtained in eutrophic and overweight individuals with COPD showed no statistically different results. We observed that the SDNN index indicated lower overall variability (p=0.003), and root mean square of successive differences between normal heart beats (RMSSD) (p=0.04) indicated lower parasympathetic modulation in the overweight group than observed in the eutrophic group. The indexes of the frequency domain presented lower values of total variability (p<0.01), low frequency bands (p<0.01), and high frequency (p=0.02), suggesting a higher sympathetic modulation and reduced parasympathetic modulation of the overweight group compared to eutrophic group. The overweight group also showed reduced sleep quality than the eutrophic group.
    Conclusion: Overweight COPD patients showed lower autonomic modulation and impaired sleep quality, latency, and efficiency as compared eutrophic subjects. These results reinforce the importance of weight control and the acquisition of healthy habits in this population.
    Mesh-Begriff(e) Case-Control Studies ; Heart Rate ; Humans ; Obesity/complications ; Pulmonary Disease, Chronic Obstructive ; Sleep
    Sprache Englisch
    Erscheinungsdatum 2021-01-20
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2182801-5
    ISSN 1980-5322 ; 1807-5932
    ISSN (online) 1980-5322
    ISSN 1807-5932
    DOI 10.6061/clinics/2021/e1826
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

    Verfügbar in ZB MED Köln/Königswinter

    Zs.B 404: Hefte anzeigen Standort:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

  7. Artikel ; Online: Redox imbalance is related to HIV and pregnancy.

    Vanessa Martinez Manfio / Karen Ingrid Tasca / Jessica Leite Garcia / Janaina de Oliveira Góis / Camila Renata Correa / Lenice do Rosário de Souza

    PLoS ONE, Vol 16, Iss 5, p e

    2021  Band 0251619

    Abstract: Redox imbalance may compromise the homeostasis of physiological processes indispensable to gestational development in HIV-infected women. The present study aims to evaluate markers of the redox system in the development of pregnancy of these women. HIV- ... ...

    Abstract Redox imbalance may compromise the homeostasis of physiological processes indispensable to gestational development in HIV-infected women. The present study aims to evaluate markers of the redox system in the development of pregnancy of these women. HIV-positive pregnant women, HIV-negative pregnant women and non-pregnant were studied. Redox markers superoxide dismutase (SOD), catalase (CAT), protein carbonylation and malondialdehyde (MDA) were assessed at first or second trimester, third trimester and postpartum from pregnant and from non-pregnant women. According to the longitudinal analysis model, CAT activity was increased in the postpartum in HIV-positive women and before delivery in HIV-negative women. Increased carbonylation was observed in the pre-delivery period of HIV-negative pregnant women and MDA concentrations were higher in HIV-positive pregnant women compared to those non-infected by HIV at all times. According to the factorial model, higher SOD and CAT activities were observed in HIV-positive women in the initial months of pregnancy and in non-pregnant women. Carbonylation at third trimester was more evident in HIV-negative pregnant women. MDA levels were higher in HIV-positive pregnant women. Increased oxidative stress may occur in HIV-infected pregnant women. Nevertheless, the HIV virus is not solely responsible for this process; instead, mechanisms inherent to the pregnancy seem to play a role in this imbalance.
    Schlagwörter Medicine ; R ; Science ; Q
    Sprache Englisch
    Erscheinungsdatum 2021-01-01T00:00:00Z
    Verlag Public Library of Science (PLoS)
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

    Zusatzmaterialien

    Kategorien

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

  8. Artikel ; Online: Obesity as an additional factor for autonomic imbalance and poor sleep behavior in chronic obstructive pulmonary disease

    Cristiano Mostarda / Catarina de Andrade Barboza / Ana Lídia Cutrim / Antonio Carlos Silva-Filho / Carlos José Dias / Janaina De Oliveira Brito-Monzani / Bruno Rodrigues

    Clinics, Vol

    a case-control study

    2021  Band 76

    Abstract: OBJECTIVES: We compared the autonomic modulation and sleep behavior of eutrophic and overweight patients with chronic obstructive pulmonary disease (COPD). METHODS: COPD participants were divided into the overweight and eutrophic groups. Pulmonary ... ...

    Abstract OBJECTIVES: We compared the autonomic modulation and sleep behavior of eutrophic and overweight patients with chronic obstructive pulmonary disease (COPD). METHODS: COPD participants were divided into the overweight and eutrophic groups. Pulmonary function, blood pressure, body composition, autonomic modulation, and the Pittsburgh Sleep Quality Index score were assessed. Participants performed the six-minute walk test for functional assessment. RESULTS: Spirometric variables obtained in eutrophic and overweight individuals with COPD showed no statistically different results. We observed that the SDNN index indicated lower overall variability (p=0.003), and root mean square of successive differences between normal heart beats (RMSSD) (p=0.04) indicated lower parasympathetic modulation in the overweight group than observed in the eutrophic group. The indexes of the frequency domain presented lower values of total variability (p<0.01), low frequency bands (p<0.01), and high frequency (p=0.02), suggesting a higher sympathetic modulation and reduced parasympathetic modulation of the overweight group compared to eutrophic group. The overweight group also showed reduced sleep quality than the eutrophic group. CONCLUSION: Overweight COPD patients showed lower autonomic modulation and impaired sleep quality, latency, and efficiency as compared eutrophic subjects. These results reinforce the importance of weight control and the acquisition of healthy habits in this population.
    Schlagwörter Overweight ; Chronic Obstructive Pulmonary Disease ; Autonomic Modulation ; Sleep Behavior ; Medicine (General) ; R5-920
    Thema/Rubrik (Code) 796
    Sprache Englisch
    Erscheinungsdatum 2021-01-01T00:00:00Z
    Verlag Elsevier España
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

    Zusatzmaterialien

    Kategorien

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

  9. Artikel ; Online: COVID-19 Outbreak in a Large Penitentiary Complex, April–June 2020, Brazil

    Fernando A. Gouvea-Reis / Patrícia D. Oliveira / Danniely C.S. Silva / Lairton S. Borja / Jadher Percio / Fábio S. Souza / Cássio Peterka / Claudia Feres / Janaína de Oliveira / Giselle Sodré / Wallace dos Santos / Camile de Moraes

    Emerging Infectious Diseases, Vol 27, Iss 3, Pp 924-

    2021  Band 927

    Abstract: An outbreak of coronavirus disease began in a large penitentiary complex in Brazil on April 1, 2020. By June 12, there were 1,057 confirmed cases among inmates and staff. Nine patients were hospitalized, and 3 died. Mean serial interval was ≈2.5 days; ... ...

    Abstract An outbreak of coronavirus disease began in a large penitentiary complex in Brazil on April 1, 2020. By June 12, there were 1,057 confirmed cases among inmates and staff. Nine patients were hospitalized, and 3 died. Mean serial interval was ≈2.5 days; reproduction number range was 1.0–2.3.
    Schlagwörter Brazil ; coronavirus disease ; COVID-19 ; infectious diseases ; outbreaks ; overcrowding ; Medicine ; R ; Infectious and parasitic diseases ; RC109-216
    Sprache Englisch
    Erscheinungsdatum 2021-03-01T00:00:00Z
    Verlag Centers for Disease Control and Prevention
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

    Zusatzmaterialien

    Kategorien

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

  10. Artikel: Prognostic Factors in Children and Adolescents with Lymphomas and Vertical Transmission of HIV in Rio de Janeiro, Brazil: A Multicentric Hospital-Based Survival Analysis Study.

    Duarte, Nathalia Lopez / Bueno, Ana Paula Silva / Sanches, Bárbara Sarni / Ramos, Gabriella Alves / Santos, Julia Maria Bispo Dos / Silva, Henrique Floriano Hess E / Pondé, Janaina de Oliveira / Sá, José Gilberto de / Rossi, Priscila Mazucanti / Horn, Patricia Regina Cavalcanti Barbosa / Sztajnbok, Denise Cardoso das Neves / Rubini, Norma de Paula Motta / da Costa, Elaine Sobral / Milito, Cristiane Bedran / de Abreu, Thalita Fernandes / Land, Marcelo Gerardin Poirot

    Cancers

    2023  Band 15, Heft 8

    Abstract: Lymphomas related to HIV are generally aggressive and have a poor prognosis, despite the use of combined antiretroviral therapy (cART) and effective chemotherapy treatment. To determine survival and prognostic factors in children and adolescents living ... ...

    Abstract Lymphomas related to HIV are generally aggressive and have a poor prognosis, despite the use of combined antiretroviral therapy (cART) and effective chemotherapy treatment. To determine survival and prognostic factors in children and adolescents living with HIV (CLWH) in Rio de Janeiro (RJ), Brazil, who developed lymphomas, we performed a retrospective and observational study of vertically infected CLWH aged from 0 to 20 incomplete years during1995 to 2018 at five reference centers for cancer and HIV/AIDS treatment. Of the 25 lymphomas, 19 were AIDS-defining malignancies (ADM) and 6 were non-AIDS-defining malignancies (NADM). The 5-year overall survival (OS) and 5-year event-free survival (EFS) probabilities were both 32.00% (95% CI = 13.72-50.23%), and the 5-year disease-free survival (DFS) probability was 53.30% (95% CI = 28.02-78.58%). In the multivariate Cox regression analysis, performance status 4 (PS 4) was considered a poor prognostic factor for OS (HR 4.85, 95% CI = 1.81-12.97,
    Sprache Englisch
    Erscheinungsdatum 2023-04-14
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2527080-1
    ISSN 2072-6694
    ISSN 2072-6694
    DOI 10.3390/cancers15082292
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

Zum Seitenanfang