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Weather conditions and moon phase influence on Tropical Screech Owl and Burrowing Owl detection by playback

BRAGA, Ana Claudia Rocha; MOTTA-JUNIOR, Jose Carlos
Fonte: NEDERLANDSE ORNITHOLOGISCHE UNIE Publicador: NEDERLANDSE ORNITHOLOGISCHE UNIE
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
46.36%
Sampling owls in a reliable and standardized way is not easy given their nocturnal habits. Playback is a widely employed technique to survey owls. We assessed the influence of wind speed, temperature, air humidity, and moon phase on the response rate of the Tropical Screech Owl Megascops choliba and the Burrowing Owl Athene cunicularia in southeast Brazil. Tropical Screech Owl occurs in scrubland and wooded habitats, whereas the Burrowing Owl inhabits open grasslands to grassland savannah. Sixteen survey points were systematically distributed in four different landscape types, ranging from open grassland to woodland savannah. Field work was conducted in 2004 from June to December, the reproductive season of the two owl species. Our study design consisted of eight field expeditions of five nights each; four expeditions occurred under full moon and four under new moon conditions. At each survey station, we performed a broadcast/listening sequence involving several calls and vocalizations from each species, starting with Tropical Screech Owl (the smaller species). From 112 sample periods for each species within their respective preferred habitats, we obtained 54 responses from Tropical Screech Owl (48% response rate) and 30 responses (27% response rate) from Burrowing Owl. We found that the response rate of Tropical Screech Owl increased under conditions of higher temperature and air humidity...

SEASONALITY OF VIRAL RESPIRATORY INFECTIONS IN SOUTHEAST OF BRAZIL: THE INFLUENCE OF TEMPERATURE AND AIR HUMIDITY

Gardinassi, Luiz Gustavo; Marques Simas, Paulo Vitor; Salomao, Joao Batista; Durigon, Edison Luiz; Zanetta, Dirce Maria Trevisan; Cordeiro, Jose Antonio; Lacerda, Mauricio Nogueira; Rahal, Paula; de Souza, Fatima Pereira
Fonte: SOC BRASILEIRA MICROBIOLOGIA; SAO PAULO Publicador: SOC BRASILEIRA MICROBIOLOGIA; SAO PAULO
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
66.59%
Viruses are the major cause of lower respiratory tract infections in childhood and the main viruses involved are Human Respiratory Syncytial Virus (HRSV), Human Metapneumovirus (HMPV), Influenzavirus A and B (FLUA and FLUB), Human Parainfluenza Virus 1, 2 and 3 (HPIV1, 2 and 3) and Human Rhinovirus (HRV). The purposes of this study were to detect respiratory viruses in hospitalized children younger than six years and identify the influence of temperature and relative air humidity on the detected viruses. Samples of nasopharyngeal washes were collected from hospitalized children between May/2004 and September/2005. Methods of viral detection were RT-PCR, PCR and HRV amplicons were confirmed by hybridization. Results showed 54% (148/272) of viral positivity. HRSV was detected in 29% (79/272) of the samples; HRV in 23.1% (63/272); HPIV3 in 5.1% (14/272); HMPV in 3.3% (9/272); HPIV1 in 2.9% (8/272); FLUB in 1.4% (4/272), FLUA in 1.1% (3/272), and HPIV2 in 0.3% (1/272). The highest detection rates occurred mainly in the spring 2004 and in the autumn 2005. It was observed that viral respiratory infections tend to increase as the relative air humidity decreases, showing significant association with monthly averages of minimal temperature and minimal relative air humidity. In conclusion...

Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity

Gardinassi, Luiz Gustavo; Simas, Paulo Vitor Marques; Salomão, João Batista; Durigon, Edison Luiz; Trevisan, Dirce Maria Zanetta; Cordeiro, José Antonio; Lacerda, Mauricio Nogueira; Rahal, Paula; Souza, Fátima Pereira de
Fonte: Sociedade Brasileira de Microbiologia Publicador: Sociedade Brasileira de Microbiologia
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
66.59%
Viruses are the major cause of lower respiratory tract infections in childhood and the main viruses involved are Human Respiratory Syncytial Virus (HRSV), Human Metapneumovirus (HMPV), Influenzavirus A and B (FLUA and FLUB), Human Parainfluenza Virus 1, 2 and 3 (HPIV1, 2 and 3) and Human Rhinovirus (HRV). The purposes of this study were to detect respiratory viruses in hospitalized children younger than six years and identify the influence of temperature and relative air humidity on the detected viruses. Samples of nasopharyngeal washes were collected from hospitalized children between May/2004 and September/2005. Methods of viral detection were RT-PCR, PCR and HRV amplicons were confirmed by hybridization. Results showed 54% (148/272) of viral positivity. HRSV was detected in 29% (79/272) of the samples; HRV in 23.1% (63/272); HPIV3 in 5.1% (14/272); HMPV in 3.3% (9/272); HPIV1 in 2.9% (8/272); FLUB in 1.4% (4/272), FLUA in 1.1% (3/272), and HPIV2 in 0.3% (1/272). The highest detection rates occurred mainly in the spring 2004 and in the autumn 2005. It was observed that viral respiratory infections tend to increase as the relative air humidity decreases, showing significant association with monthly averages of minimal temperature and minimal relative air humidity. In conclusion...

Influência da temperatura e da umidade relativa ambientais na manutenção da esterilidade de materiais autoclavados e armazenados em diferentes embalagens; The influence of enviromental temperature and air humidity in the maintenance of the sterility of materials sterilized in diferent wraps

Bruna, Camila Quartim de Moraes
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 07/10/2010 PT
Relevância na Pesquisa
56.61%
Uma das variáveis que interfere na manutenção da esterilidade dos materiais diz respeito ao armazenamento. Muitas são as recomendações, oficiais ou não oficiais, feitas para a temperatura e a umidade relativa do ar (UR) desta área física, embora sem embasamento teórico ou experimental. Nem todos os hospitais possuem sistema que possibilite o controle da temperatura e da UR, e a área onde ficam dispostas as autoclaves, geralmente é contígua a área de guarda dos materiais esterilizados, liberando calor e vapor constantemente. Assim, o objetivo deste estudo foi avaliar e analisar os efeitos da alta umidade e da alta temperatura ambientais na contaminação do conteúdo de caixas cirúrgicas. Considerando que uma das funções das embalagens é manter a esterilidade do conteúdo, ainda que sob condições adversas, a recomendação para controle ambiental da área de armazenamento, a priori, teria uma importância secundária. Suscitou-se, então, a dúvida quanto à real importância da temperatura e da UR na contaminação dos artigos armazenados, após a esterilização em autoclave. Portanto, foi realizado um estudo experimental, em que caixas contendo instrumentais cirúrgicos e carreadores de porcelana foram embaladas em campo de algodão tecido...

Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity

Gardinassi, Luiz Gustavo; Simas, Paulo Vitor Marques; Salomão, João Batista; Durigon, Edison Luiz; Trevisan, Dirce Maria Zanetta; Cordeiro, José Antonio; Lacerda, Mauricio Nogueira; Rahal, Paula; Souza, Fátima Pereira de
Fonte: Sociedade Brasileira de Microbiologia Publicador: Sociedade Brasileira de Microbiologia
Tipo: Artigo de Revista Científica Formato: 98-108
ENG
Relevância na Pesquisa
66.59%
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Processo FAPESP: 02/08461-2; Processo FAPESP: 04/06883-2; Viruses are the major cause of lower respiratory tract infections in childhood and the main viruses involved are Human Respiratory Syncytial Virus (HRSV), Human Metapneumovirus (HMPV), Influenzavirus A and B (FLUA and FLUB), Human Parainfluenza Virus 1, 2 and 3 (HPIV1, 2 and 3) and Human Rhinovirus (HRV). The purposes of this study were to detect respiratory viruses in hospitalized children younger than six years and identify the influence of temperature and relative air humidity on the detected viruses. Samples of nasopharyngeal washes were collected from hospitalized children between May/2004 and September/2005. Methods of viral detection were RT-PCR, PCR and HRV amplicons were confirmed by hybridization. Results showed 54% (148/272) of viral positivity. HRSV was detected in 29% (79/272) of the samples; HRV in 23.1% (63/272); HPIV3 in 5.1% (14/272); HMPV in 3.3% (9/272); HPIV1 in 2.9% (8/272); FLUB in 1.4% (4/272), FLUA in 1.1% (3/272), and HPIV2 in 0.3% (1/272). The highest detection rates occurred mainly in the spring 2004 and in the autumn 2005. It was observed that viral respiratory infections tend to increase as the relative air humidity decreases...

An evaporative and desiccant cooling system for air conditioning in humid climates

Camargo, J. R.; Godoy, E.; Ebinuma, C. D.
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 243-247
ENG
Relevância na Pesquisa
46.51%
Evaporative cooling operates using water and air as working fluids. It consists in water evaporation, through the passage of an airflow, thus decreasing the air temperature. This system has a great potential to provide thermal comfort in places where air humidity is low, being, however, less efficient where air humidity is high. A way to solve this problem is to use dehumidifiers to pre-conditioning the process air. This paper presents a system that can be used in humid climates coupling desiccant dehumidification equipment to evaporative coolers. The paper shows, initially, the main characteristics of the evaporative cooling and of the adsorption dehumidification systems. Later on the coupled systems, in which occurs a dehumidification by adsorption in a counter flow rotary heat exchanger following the evaporate cooling of the air in evaporative coolers, are analyzed. The thermodynamic equations of state are also presented. Following, this paper analyzes some operation parameters such as: reactivation temperature, R/P relationship (reactivation air flow/ process air flow) and the thermodynamic conditions of the entering air flow. The paper shows the conditions for the best operation point, with regard to thermal comfort conditions and to the energy used in the process. In addition this paper presents an application of the system in different climate characteristics of several tropical and equatorial cities. Copyright © 2005 by ABCM.

Experimental research on the influence of the air humidity conditions in an air conditioning system

Sobrinho, Pedro Magalhães; Tuna, Celso Eduardo
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 152-159
ENG
Relevância na Pesquisa
56.63%
The factors that have influence on the energy consumption of a small air conditioning system that are worth mentioning are the efficiencies of the compressor, evaporator and condenser, the form that the refrigerant flow is controlled, the fan model used, and climatic conditions. Within the climate issue, an interesting factor is that the relative humidity when it comes to the effect that it causes, especially in the performance of the air condenser, which generally is not considered in the projects. This study aims to evaluate the influence of humidity on the coefficient of system performance (COP), seeking to quantify their influence when it happens. The tests were performed on a testing bench, mounted at the Laboratory for Energy Efficiency (LAMOTRIZ) UNESP-Campus Guaratinguetá. In the study, the wet bulb temperature was ranged, keeping the rotation of the scroll compressor with application of a frequency inverter in its best performance. The test bench is provided with a supervisory system of data collection that is also able to control all functions of the bench. In the results, there was a significant influence, particularly when comparing high humidity conditions with low humidity, noting that only over 65% relative humidity is that significant changes are observed in the COP of the system. © 2013 Elsevier Inc.

Air flow humidification for air-assisted boom sprayer

Stanislavski, Wilson M.; Antuniassi, Ulisses R.; Chechetto, Rodolfo G.
Fonte: Associação Brasileira de Engenharia Agrícola (SBEA) Publicador: Associação Brasileira de Engenharia Agrícola (SBEA)
Tipo: Artigo de Revista Científica Formato: 48-56
ENG
Relevância na Pesquisa
46.65%
The air-assisted ground spray is fairly widespread. However, due to the unpredictable weather conditions, the operational efficiency is impaired by stops on grounds of low humidity and high temperatures. The aim of this work was to assess an air humidification method and evaluate its impact on temperature and air humidity for the air curtain of the air-assisted sprayer. With respect to relative air humidity, it has increased in 6.59%, being the maximum change when inserting 1.92 L min-1. So, it is concluded that the pipeline humidification might significantly reduce temperature and enhance air humidity. The treatments performed in this study consisted of a varied flow of a humidity device, related to weather conditions. Temperature and relative air humidity were measured at 1.0 m height from right to left of middle point of the machine, corresponding to the end of the spray boom, in the middle and end of right spray boom. The readings were also performed at three different distances from the end of the pipeline and at 0.25 and 0.50 m from that to the soil. The results show that 0.48 L min-1 in the humidification system has promoted a better efficiency in reducing air-temperature, on average 2.52 ºC when compared to the non-humidified one.; A aplicação terrestre com assistência de ar é bastante difundida. Entretanto...

Effect of Air Humidity on the Evolution of Permeability and Performance of a Fibrous Filter during Loading with Hygroscopic and Non-hygroscopic Particles

Miguel, A. F.
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
66.47%
A model was developed to predict the permeability and performance (i.e., the product of the permeability by the number of aerosol particles caught per unit surface) of a fibrous filter in dynamic regime. Besides the mass loading of the aerosol particles, this model took into account the structural characteristics of the filter, the size of the loading particles and the filtration velocity. An experimental filtration study was carried out to obtain the necessary input data for a comprehensive estimation of some relevant parameters of the model and to verify it. This study was performed with sodium chloride and alumina aerosols in the size range of 0.5–1.3 micron and 0.8–6 micron, respectively, and

Air flow humidification for air-assisted boom sprayer

Stanislavski,Wilson M.; Antuniassi,Ulisses R.; Chechetto,Rodolfo G.
Fonte: Associação Brasileira de Engenharia Agrícola Publicador: Associação Brasileira de Engenharia Agrícola
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/02/2014 EN
Relevância na Pesquisa
46.65%
The air-assisted ground spray is fairly widespread. However, due to the unpredictable weather conditions, the operational efficiency is impaired by stops on grounds of low humidity and high temperatures. The aim of this work was to assess an air humidification method and evaluate its impact on temperature and air humidity for the air curtain of the air-assisted sprayer. With respect to relative air humidity, it has increased in 6.59%, being the maximum change when inserting 1.92 L min-1. So, it is concluded that the pipeline humidification might significantly reduce temperature and enhance air humidity. The treatments performed in this study consisted of a varied flow of a humidity device, related to weather conditions. Temperature and relative air humidity were measured at 1.0 m height from right to left of middle point of the machine, corresponding to the end of the spray boom, in the middle and end of right spray boom. The readings were also performed at three different distances from the end of the pipeline and at 0.25 and 0.50 m from that to the soil. The results show that 0.48 L min-1 in the humidification system has promoted a better efficiency in reducing air-temperature, on average 2.52 ºC when compared to the non-humidified one.

Seasonality of viral respiratory infections in Southeast of Brazil: the influence of temperature and air humidity

Gardinassi,Luiz Gustavo; Simas,Paulo Vitor Marques; Salomão,João Batista; Durigon,Edison Luiz; Trevisan,Dirce Maria Zanetta; Cordeiro,José Antonio; Lacerda,Mauricio Nogueira; Rahal,Paula; Souza,Fátima Pereira de
Fonte: Sociedade Brasileira de Microbiologia Publicador: Sociedade Brasileira de Microbiologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2012 EN
Relevância na Pesquisa
66.59%
Viruses are the major cause of lower respiratory tract infections in childhood and the main viruses involved are Human Respiratory Syncytial Virus (HRSV), Human Metapneumovirus (HMPV), Influenzavirus A and B (FLUA and FLUB), Human Parainfluenza Virus 1, 2 and 3 (HPIV1, 2 and 3) and Human Rhinovirus (HRV). The purposes of this study were to detect respiratory viruses in hospitalized children younger than six years and identify the influence of temperature and relative air humidity on the detected viruses. Samples of nasopharyngeal washes were collected from hospitalized children between May/2004 and September/2005. Methods of viral detection were RT-PCR, PCR and HRV amplicons were confirmed by hybridization. Results showed 54% (148/272) of viral positivity. HRSV was detected in 29% (79/272) of the samples; HRV in 23.1% (63/272); HPIV3 in 5.1% (14/272); HMPV in 3.3% (9/272); HPIV1 in 2.9% (8/272); FLUB in 1.4% (4/272), FLUA in 1.1% (3/272), and HPIV2 in 0.3% (1/272). The highest detection rates occurred mainly in the spring 2004 and in the autumn 2005. It was observed that viral respiratory infections tend to increase as the relative air humidity decreases, showing significant association with monthly averages of minimal temperature and minimal relative air humidity. In conclusion...

Ammonia Flux between Oilseed Rape Plants and the Atmosphere in Response to Changes in Leaf Temperature, Light Intensity, and Air Humidity (Interactions with Leaf Conductance and Apoplastic NH4+ and H+ Concentrations).

Husted, S.; Schjoerring, J. K.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /09/1996 EN
Relevância na Pesquisa
46.36%
NH3 exchange between oilseed rape (Brassica napus) plants and the atmosphere was examined at realistic ambient NH3 levels under controlled environmental conditions. Different leaf conductances to NH3 diffusion were obtained by changing leaf temperature (10 to 40[deg]C), light intensity (0 to 600 [mu]mol m-2 s-1), and air humidity (20 to 80%), respectively. NH3 adsorption to the cuticle with subsequent NH3 transport through the epidermis had no significant effect on the uptake of atmospheric NH3, even at 80% relative air humidity. NH3 fluxes increased linearly with leaf conductance when light intensities were increased from 0 to 600 [mu]mol m-2 s-1. Increasing leaf temperatures from 10 to 35[deg]C caused an exponential increase in NH3 emission from plants exposed to low ambient NH3 concentrations, indicating that leaf conductance was not the only factor responding to the temperature increase. The exponential relationship between NH3 emission and temperature was closely matched by the temperature dependence of the mole fraction of gaseous NH3 above the leaf apoplast (NH3 compensation point), as calculated on the basis of NH4+ and H+ concentrations in the leaf apoplast at the different leaf temperatures. NH3 fumigation experiments showed that an increase in leaf temperature may cause a plant to switch from being a strong sink for atmospheric NH3 to being a significant NH3 source. In addition to leaf temperature...

Differences between water permeability of astomatous and stomatous cuticular membranes: effects of air humidity in two species of contrasting drought-resistance strategy

Karbulková, Jana; Schreiber, Lukas; Macek, Petr; Šantrůček, Jiří
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
46.4%
Cuticular water permeabilities of adaxial and abaxial leaf surfaces and their dependence on relative air humidity (RH) applied in long-term and short-term regimes have been analysed for Hedera helix, native in a temperate climate, and Zamioculcas zamiifolia, native in subtropical regions. The water permeability of cuticular membranes (CM) isolated from the adaxial (astomatous) and abaxial (stomatous) leaf sides was measured using a method which allowed the separation of water diffusion through the remnants of the original stomatal pores from water diffusion through the solid cuticle. The long-term effects of low (20–40%) or high (60–80%) RH applied during plant growth and leaf ontogeny (‘growth RH’) and the short-term effects of applying 2% or 100% RH while measuring permeability (‘measurement RH’) were investigated. With both species, water permeability of the solid stomatous CM was significantly higher than the permeability of the astomatous CM. Adaxial cuticles of plants grown in humid air were more permeable to water than those from dry air. The adaxial CM of the drought-tolerant H. helix was more permeable and more sensitive to growth RH than the adaxial CM of Z. zamiifolia, a species avoiding water stress. However...

Seasonality of viral respiratory infections in southeast of Brazil: the influence of temperature and air humidity

Gardinassi, Luiz Gustavo; Marques Simas, Paulo Vitor; Salomão, João Batista; Durigon, Edison Luiz; Zanetta Trevisan, Dirce Maria; Cordeiro, José Antonio; Lacerda, Mauricio Nogueira; Rahal, Paula; de Souz, Fátima Pereira
Fonte: Sociedade Brasileira de Microbiologia Publicador: Sociedade Brasileira de Microbiologia
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
46.54%
Viruses are the major cause of lower respiratory tract infections in childhood and the main viruses involved are Human Respiratory Syncytial Virus (HRSV), Human Metapneumovirus (HMPV), Influenzavirus A and B (FLUA and FLUB), Human Parainfluenza Virus 1, 2 and 3 (HPIV1, 2 and 3) and Human Rhinovirus (HRV). The purposes of this study were to detect respiratory viruses in hospitalized children younger than six years and identify the influence of temperature and relative air humidity on the detected viruses. Samples of nasopharyngeal washes were collected from hospitalized children between May/2004 and September/2005. Methods of viral detection were RT-PCR, PCR and HRV amplicons were confirmed by hybridization. Results showed 54% (148/272) of viral positivity. HRSV was detected in 29% (79/272) of the samples; HRV in 23.1% (63/272); HPIV3 in 5.1% (14/272); HMPV in 3.3% (9/272); HPIV1 in 2.9% (8/272); FLUB in 1.4% (4/272), FLUA in 1.1% (3/272), and HPIV2 in 0.3% (1/272). The highest detection rates occurred mainly in the spring 2004 and in the autumn 2005. It was observed that viral respiratory infections tend to increase as the relative air humidity decreases, showing significant association with monthly averages of minimal temperature and minimal relative air humidity. In conclusion...

Efeito da temperatura e umidade do ar sobre as características seminais de galos alojados em galpões semiclimatizados; Effect of temperature and air humidity on the seminal characteristics of roosters housed in semi airconditioned sheds

Santos, Lívia Karen Dias
Fonte: Universidade Federal de Uberlândia Publicador: Universidade Federal de Uberlândia
Tipo: Dissertação
POR
Relevância na Pesquisa
46.56%
Foi avaliado o efeito da temperatura e umidade do ar sobre as características do sêmen de galos da linhagem Cobb 500, de 45 a 65 semanas de idade, alojados em galpão semiclimatizado. Os galos foram mantidos separados em um espaço de 90 x 90 x 90 cm e as coletas de sêmen foram realizadas quinzenalmente, totalizando 267 amostras. Quanto à análise estatística, aplicou-se o teste não-paramétrico de Kruskal- Wallis, seguido do teste de Dunn, ambos a 0,05 de significância. Para avaliar a influência dos fatores ambientais sobre as características do sêmen foi utilizado o coeficiente de correlação linear simples de Pearson. Verificou-se que o volume de sêmen na 1a coleta (45 semanas de idade) não diferiu das demais, exceto 8a coleta (59 semanas). O valor médio de motilidade na 2a coleta (47 semanas) diferiu da 6a, 7a e 8a coletas que corresponde a 55, 57 e 59 semanas. Os valores médios de vigor e patologias espermáticas não diferiram entre as coletas. Entre as características seminais estudadas neste trabalho, as patologias espermáticas apresentaram maior coeficiente de variação (85,91%) e a motilidade apresentou o menor (11,33%). Houve correlação positiva e significativa, porém baixa, entre temperatura máxima no dia da coleta e motilidade...

Indoor air microbiological evaluation of offices, hospitals, industries, and shopping centers

Nunes,Zilma G; Martins,Alfredo S; Altoe,Ana Lúcia F; Nishikawa,Marília M; Leite,Marilene O; Aguiar,Paula F; Fracalanzza,Sérgio Eduardo L
Fonte: Instituto Oswaldo Cruz, Ministério da Saúde Publicador: Instituto Oswaldo Cruz, Ministério da Saúde
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/07/2005 EN
Relevância na Pesquisa
46.38%
In this study it was compared the MAS-100 and the Andersen air samplers' performances and a similar trend in both instruments was observed. It was also evaluated the microbial contamination levels in 3060 samples of offices, hospitals, industries, and shopping centers, in the period of 1998 to 2002, in Rio de Janeiro city. Considering each environment, 94.3 to 99.4% of the samples were the allowed limit in Brazil (750 CFU/m³). The industries' results showed more important similarity among fungi and total heterotrophs distributions, with the majority of the results between zero and 100 CFU/m³. The offices' results showed dispersion around 300 CFU/m³. The hospitals' results presented the same trend, with an average of 200 CFU/m³. Shopping centers' environments showed an average of 300 CFU/m³ for fungi, but presented a larger dispersion pattern for the total heterotrophs, with the highest average (1000 CFU/m³). It was also investigated the correlation of the sampling period with the number of airborne microorganisms and with the environmental parameters (temperature and air humidity) through the principal components analysis. All indoor air samples distributions were very similar. The temperature and air humidity had no significant influence on the samples dispersion patterns.

Elevated air humidity affects hydraulic traits and tree size but not biomass allocation in young silver birches (Betula pendula)

Sellin, Arne; Rosenvald, Katrin; Õunapuu-Pikas, Eele; Tullus, Arvo; Ostonen, Ivika; Lõhmus, Krista
Fonte: Frontiers Media S.A. Publicador: Frontiers Media S.A.
Tipo: Artigo de Revista Científica
Publicado em 13/10/2015 EN
Relevância na Pesquisa
46.56%
As changes in air temperature, precipitation, and air humidity are expected in the coming decades, studies on the impact of these environmental shifts on plant growth and functioning are of major importance. Greatly understudied aspects of climate change include consequences of increasing air humidity on forest ecosystems, predicted for high latitudes. The main objective of this study was to find a link between hydraulic acclimation and shifts in trees’ resource allocation in silver birch (Betula pendula Roth) in response to elevated air relative humidity (RH). A second question was whether the changes in hydraulic architecture depend on tree size. Two years of application of increased RH decreased the biomass accumulation in birch saplings, but the biomass partitioning among aboveground parts (leaves, branches, and stems) remained unaffected. Increased stem Huber values (xylem cross-sectional area to leaf area ratio) observed in trees under elevated RH did not entail changes in the ratio of non-photosynthetic to photosynthetic tissues. The reduction of stem–wood density is attributable to diminished mechanical load imposed on the stem, since humidified trees had relatively shorter crowns. Growing under higher RH caused hydraulic conductance of the root system (KR) to increase...

Scaling behaviour in daily air humidity fluctuations

Vattay, Gabor; Harnos, Andrea
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 29/11/1993
Relevância na Pesquisa
46.47%
We show that the daily average air humidity fluctuations exhibit non-trivial $1/f^{\alpha}$ behaviour which different from the spectral properties of other meteorological quantities. This feature and the fractal spatial strucure found in clouds make it plausible to regard air humidity fluctuations as a manifestation of self-organized criticality. We give arguments why the dynamics in air humidity can be similar to those in sandpile models of SOC.; Comment: 3 pages, latex rewtex, 6 short Post Script files attached

Hardening of oleander seedlings by deficit irrigation and low air humidity

Bañón, Sebastián; Ochoa, J.; Franco, J. A.; Alarcón Cabañero, Juan José; Sánchez-Blanco, María Jesús
Fonte: Elsevier Publicador: Elsevier
Tipo: Artículo Formato: 579917 bytes; image/jpeg
ENG
Relevância na Pesquisa
46.63%
The purpose of this study was to examine the effect of irrigation and air humidity during the nursery phase on the water relations, growth and survival of Nerium oleander L. (oleander) to evaluate the degree of hardening resulting from these conditions. Oleander seedlings were planted in 1860 cm3 plastic pots and grown in two greenhouses (nursery phase), where they were subjected to four treatments: low air humidity and deficit irrigation; control air humidity and deficit irrigation; low air humidity and control irrigation; control air humidity and control irrigation. After the nursery phase, each plant was transplanted to a 6450 cm3 plastic pot. The plants were watered 1 day per week to 100% water-holding capacity for 2 weeks, after which they received no irrigation for the remaining 4 weeks of the experiment. The combined effect of both treatments (deficit irrigation and low air humidity) reduced the rate of mortality after transplant compared with the control (from 92% to 32%) as a result of acclimation processes. Such behavior was related to the morphological changes observed in the aerial part (smaller plant size and lower leaf area) and in the root (shorter, thicker, more dense and less ramified roots), and with physiological changes (development of osmotic adjustment...

Effects of irrigation and air humidity preconditioning on water relations, growth and survival of Rosmarinus officinalis plants during and after transplanting

Sánchez-Blanco, María Jesús; Ferrández, Trinitario; Navarro García, Alejandra; Bañón, Sebastián; Alarcón Cabañero, Juan José
Fonte: Elsevier Publicador: Elsevier
Tipo: Artículo Formato: 579917 bytes; image/jpeg
ENG
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The effect of different irrigation and air humidity conditioning treatments on the morphological and physiological responses of Rosmarinus officinalis in nursery conditions was investigated in order to evaluate the degree of hardening resulting from these conditions. Rosmarinus officinalis seedlings were pot-grown during 4 months in two greenhouses (nursery period), in which two irrigation treatments were used (control and deficit). In one of these greenhouses, air humidity was controlled using a dehumidifying system (low humidity), in the other greenhouse the air conditions were not artificially modified (control humidity). After the nursery period, the plants of all treatments were transplanted and well watered (100% water holding capacity for 1 month, transplanting period). After this period, they received no water (establishment period). At the end of the nursery period it was seen that deficit irrigation had altered the morphology of the R. officinalis plants by reducing plant height, stem diameter, leaf area, total dry weight, and root length, while humidity influenced the parameters related with plant water relations. Low air humidity and deficit irrigation-induced tissue dehydration and lower stomatal conductance values (gs). The plants subjected to deficit irrigation developed leaf osmotic adjustment...