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Wyszukujesz frazę "heat-stress" wg kryterium: Wszystkie pola


Tytuł:
Roślinne czynniki szoku cieplnego
Plant heat stress factors
Autorzy:
Stawski, Karol
Goc, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1194712.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Przyrodników im. Kopernika
Opis:
Transkrypcyjne czynniki szoku cieplnego (Hsf) są niezbędne dla wszystkich organizmów eukariotycznych do przetrwania w warunkach silnego stresu. Są odpowiedzialne za transkrypcyjną regulację genów kodujących białka chaperonowe oraz inne białka powiązane ze stresem. W porównaniu do czterech Hsf kręgowców, roślinne Hsf są bardzo liczne i mogą mieć nawet 25 członków. Wykazują one wysoki stopień specjalizacji w stosunku do rodzaju stresu jak również różnych programów rozwojowych. Pomimo pewnych wysoce zachowywanych cech, różnice w strukturze roślinnych Hsf pozwoliły na wyróżnieni trzech podstawowych klas (klasa A, B i C). W przeciwieństwie do aktywatorowej klasy A, klasy C i B o porównywalnej liczbie członków nie posiadają oczywistej funkcji. U roślin transkrypcyjna regulacja genów zależnych od Hsf jest kontrolowana przez pośrednią lub bezpośrednią kooperację pomiędzy różnymi czynnikami Hsf, jak również w wyniku interakcji z białkami czperonowymi. Wciąż jednak sieć wzajemnych zależności pomiędzy poszczególnymi Hsf jest mało zrozumiała. Z całą pewność Hsf funkcjonują jako część składowa szlaków transdukcji sygnałów aktywowanych w stresie środowiskowym jak i w trakcie rozwoju.
Heat shock factors (Hsf) are essential for all eukaryotic organisms to survive under exposures to acute stress. They are transcriptional regulators of genes encoding molecular chaperones and other stress proteins. Compared with other eukaryotes, e.g. vertebrates with 4 members of the Hsf family, the plant Hsf family shows a large multiplicity, with more than 20 members. The plant Hsf family shows a strong diversification of expression pattern not only in response to stress, but also during various developmental programs. Despite many conserved features plant Hsf are allocated based on structural characteristics into three major classes (class A, B and C). In contrast to class A, a considerable number of Hsf assigned to classes B and C heave no evident function as transcription activators. Transcriptional regulation of Hsf dependent genes in plants is controlled by direct and indirect cooperation between distinct Hsf members and by interaction with chaperones. However our understanding of the function of plant Hsf network is far from complete. Certainly, they can functions as part of different signal transduction pathways operating in response to environmental stress and during development.
Źródło:
Kosmos; 2012, 61, 4; 625-634
0023-4249
Pojawia się w:
Kosmos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-invasive technique of crop heat-stress resistance estimation
Autorzy:
Trojak, Magdalena
Skowron, Ernest
Powiązania:
https://bibliotekanauki.pl/articles/1179185.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
barley
heat resistance
heat stress
modulated fluorescence (PAM)
photosystem II (PSII)
Opis:
Sessile organisms like plants have drastically reduce possibility to avoid harmful influence of the natural habitat. Evolution of first land plants allowed adapting to harsh conditions, yet despite broad range of tolerance factors such as excessive light and temperature impose limitation for biological activity because viability and in the case of crops the productivity is limited. In fact, physiologists make lots of efforts to increase stress tolerance searching and selecting new cultivars of known crops. As in most cases the exact mechanism of reached improvement is still missing selection is occupied by immense amount of time, energy and funds. Proposed in paper technique of stress resistance estimation is inexpensive and highly reproducible solution for crop selection even at early stage of development. It is based on well-known fluorescent assessment (PAM) of plant photosynthetic machinery expose to factor of interest. We tested two barley (Hordeum vulgare L.) cultivars spring Carina and winter Lomerit exposed to thermal stress and estimated maximal (Fv/Fm) and effective photosystem II quantum yield precisely specifying the way absorbed energy is utilized by photochemical (ΦPSII) or regulated (ΦNPQ) and non-regulated (ΦNO) non-photochemical manner. Studies have confirmed various heat-resistance of tested barley cultivars and proved PAM technique utility.
Źródło:
World Scientific News; 2017, 83; 168-181
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ergonomics in Practice: Physical Workload and Heat Stress in Thailand
Autorzy:
Yoopat, P.
Toicharoen, P.
Glinsukon, T.
Vanwonterghem, K.
Louhevaara, V.
Powiązania:
https://bibliotekanauki.pl/articles/91204.pdf
Data publikacji:
2002
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
ergonomics
heat stress
physiological strain
ciepło
Tajlandia
ergonomia
obciążenie pracą umysłową
stres
praca w wysokiej temperaturze
fizjologia pracy
warunki pracy
Opis:
This study consists of assessments of the thermal environment and physiological strain in tasks associated with airport, construction, and metal jobs. The number of male and female participants was 108. Environmental heat stress was evaluated with the WBGT index. Physiological strain was evaluated by the relative cardiovascular load (%CVL) based on the measurements of heart rate. Also the increase of body temperature, weight loss, and perceived discomfort were determinated. At work sites the assessments lasted for 2 to 4 hrs for each participant. The mean physiological strain exceeded the level of 30%CVL. Severe peaks (over 60%CVL) were observed in specific tasks being in agreement with perceived discomfort ratings. The increase of body temperature and weight loss in most cases remained within acceptable limits. For the most strenuous tasks, various ergonomic improvements were developed in consultation with workers and managers.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2002, 8, 1; 83-93
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heat stress and occupational health and safety – spatial and temporal differentiation
Autorzy:
Błażejczyk, Krzysztof
Baranowski, Jarosław
Błażejczyk, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2037019.pdf
Data publikacji:
2014-04-10
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Heat stress
occupational health
UTCI
WBGT
Warsaw Agglomeration
climate change
Opis:
Evidence of climatic health hazards on the general population has been discussed in many studies but limited focus is placed on developing a relationship between climate and its effects on occupational health. Long working hours with high physical activity can cause health problems for workers ranging from mild heat cramps to severe heat stroke leading to death. The paper presents the possible risk of heat hazard to outdoor workers, using the example of Warsaw. The heat stress hazard, defined by WBGT values above 26 and 28°C and UTCI above 32 and 38°C, is assessed from two perspectives: its spatial distribution on a local scale and its temporal changes during the 21st century due to climate change. City centre and industrial districts were identified as the places with the greatest heat stress hazard. The number of heat stress days in a year (as predicted for the 21st century) is increasing, meaning that heat-related illnesses are more likely to have a direct impact on workers’ health.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2014, 18, 1; 61-67
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Short-term heat stress effects on a cyp 11A1 canola plants
Autorzy:
Sakhno, L.
Slyvets, M.
Korol, N.
Karbovska, N.
Ostapchuk, A.
Kuchuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/80876.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
abiotic stress
climate change
heat stress
cyp11A1 gene
nuclear genome
gene encoding
cytochrome P450-SCC
adrenal cortex mitochondrion
rape plant
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heat Stress Analysis Using the Discomfort Index Method: Impact on Macro Environmental in Yogyakarta
Autorzy:
Nurmaya, E. M.
Abidin, A. U.
Hasanah, N. A. I.
Asmara, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/2025782.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
discomfort index
environmental assessment
heat stress
impact heat stress
thermal comfort
Yogyakarta
Opis:
A growing urban development pattern can have both positive and negative impacts. One of them is the thermal discomfort in the form of heat stress. Heat stress is the maximum condition of the human body to receive the heat exposure to various activities. This study analyzed the thermal comfort in Yogyakarta City based on the Discomfort Index (DI) method. The DI method is commonly used in tropical climates using the parameters that include average air temperature and humidity. The data consists of secondary data obtained from Geophysics Station Gamping in 2004-2020 and Climatology Station Mlati in 2017-2020. The result of DI indicated that the highest value occurred in the wet moon climate type in April, with 25.63 °C. Therefore, the conditions showed that more than 50% of people in the city of Yogyakarta fall into an uncomfortable category with an average index of 24.97 °C, which can lead to heat stress. Environmental engineering can be employed to decrease the heat stress potential and improve the thermal comfort for Yogyakarta’s urban community, which is public and private open space, plant road shade vegetation, implement a green façade (vertical garden), as well as improve people’s living behavior and use appropriate clothing.
Źródło:
Journal of Ecological Engineering; 2022, 23, 1; 286-295
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of biomarkers of heat stress using automatic health monitoring system in dairy cows
Autorzy:
Antanaitis, R.
Urbutis, M.
Juozaitienė, V.
Malašauskienė, D.
Televičius, M.
Powiązania:
https://bibliotekanauki.pl/articles/2087176.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat stress
cow
automatic milking system
temperature
milk
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 2; 253-260
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwości minimalizowania skutków stresu cieplnego u drobiu
Procedures of minimizing heat stress in poultry production
Autorzy:
Mroczek-Sosnowska, N.
Zbikowski, A.
Lukasiewicz, M.
Wnuk, A.
Niemiec, J.
Powiązania:
https://bibliotekanauki.pl/articles/859752.pdf
Data publikacji:
2014
Wydawca:
Krajowa Izba Lekarsko-Weterynaryjna
Tematy:
chow zwierzat
drob
warunki utrzymania zwierzat
stres termiczny
profilaktyka
skutki
ograniczanie skutkow stresu
Źródło:
Życie Weterynaryjne; 2014, 89, 08
0137-6810
Pojawia się w:
Życie Weterynaryjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Występowanie stresu ciepła w środkowo-zachodniej Polsce
The occurrence of heat stress in central-west Poland
Autorzy:
Makosza, A.
Michalska, B.
Powiązania:
https://bibliotekanauki.pl/articles/2084528.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
stres cieplny
Polska Srodkowo-Zachodnia
wystepowanie
obciazenie cieplne
wskaznik HSI
klimat
pogoda
upaly
czlowiek
Opis:
On the basis of term values (12 UTC) of meteorological data of seven synoptic stations in the central-west Poland heat stress index (HSI - Heat Stress Index) was calculated. During the year the heat stress of varying intensity occurred from February to November with a maximum in August. The rest of the year was dominated by thermoneutral conditions. In the period 1971-2006, and especially since 1999, becoming more frequent of occurrence days with an intensity of heat stress was so great, that pose a risk increase in body temperature (HSI > 100%). Based on the frequency of the occurrence of days with values HSI > 30% in the central-west Polad three areas with different number of days chargeable was distinguished.
Źródło:
Prace i Studia Geograficzne; 2011, 47; 265-274
0208-4589
Pojawia się w:
Prace i Studia Geograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of heat stress on biochemical parameters of hens
Wpływ stresu cieplnego na parametry biochemiczne badanych kur
Autorzy:
Havlicek, Z.
Slama, P.
Powiązania:
https://bibliotekanauki.pl/articles/126818.pdf
Data publikacji:
2011
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
heat stress
temperature
hen
acid-base
pH
stres cieplny
temperatura
kura
właściwości kwasowo-zasadowe
Opis:
The objective of this paper was to evaluate the effects of high temperatures on biochemical parameters of hens. Heat stress generally causes a decrease in feed intake. The hypothesis that feed intake, egg production, egg quality measures, acid-base status (pH, pCO2, HCO3 –) of hens would be influenced by the high temperature period was tested. Twenty four Isa Brown hens at 60 weeks of age were used in this experiment and hens were randomly separated into 2 equal groups. Each group contains 12 hens. First control group was housed at 20.1÷21.2°C and 60÷65% relative humidity. Experimental group was housed for 2 weeks at 20.5°C and 60÷65% relative humidity in experimental box, and then exposed to 27°C and 60% for 4 week, and then allowed to recover for 2 week at 20.5°C and 60% relative humidity. All production parameters and egg quality were significantly affected by heat stress. Feed intake during first week heat period was significantly reduced (18%). In three next weeks, feed intake was increasing with reduction 14.5%, 8% and 9.5%, respectively. Blood pH values were significantly lower from 3rd week of exposure. Blood pH had these values: 1st week 7.372, 2nd week 7.371, 3rd week 7.380 and 4th week 7.289.
Źródło:
Proceedings of ECOpole; 2011, 5, 1; 57-60
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intensity of heat stress in 2015 and 2018 summer seasons in the region of the Lower Silesia (Poland)
Autorzy:
Miszuk, Bartłomiej
Powiązania:
https://bibliotekanauki.pl/articles/946945.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Bioclimate
heat stress
UTCI
Lower Silesia
south-west Poland
Opis:
The main goal of this paper was to assess the intensity of heat stress in Lower Silesia, Poland, during selected weather events characterized by high air temperatures. The complex impact of weather on the thermal load of the human organism is presented using the Universal Thermal Climate Index (UTCI). The analysis was carried out for the 2015 and 2018 summer seasons and compared with the multiannual period of 1971–2018. It was based on meteorological data from the IMGW-PIB stations of Wrocław, Jelenia Góra and Śnieżka. In order to examine how heat conditions affect UTCI in different geographical regions, stations located at different altitudes and representing the lowlands, the lower mountain zone and the summit zone of the Sudetes Mountains were considered. The research showed that during the most extreme thermal events, UTCI values in the lowlands and the lower mountain zones can be among the highest heat stress classes. In the summit zone, the maximum UTCI values are usually classed as ‘no thermal stress’.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2020, 24, 3; 138-146
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of heat stress on leaf morphology and nitrogen–carbohydrate metabolisms in two wucai (Brassica campestris L.) genotypes
Autorzy:
Yuan, L.
Tang, L.
Zhu, S.
Hou, J.
Chen, G.
Liu, F.
Liu, S.
Wang, C.
Powiązania:
https://bibliotekanauki.pl/articles/56883.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
Heat stress is a major environmental stress that limits plant growth and yield worldwide. The present study was carried out to explore the physiological mechanism of heat tolerant to provide the theoretical basis for heat-tolerant breeding. The changes of leaf morphology, anatomy, nitrogen assimilation, and carbohydrate metabolism in two wucai genotypes (WS-1, heat tolerant; WS-6, heat sensitive) grown under heat stress (40°C/30°C) for 7 days were investigated. Our results showed that heat stress hampered the plant growth and biomass accumulation in certain extent in WS-1 and WS-6. However, the inhibition extent of WS-1 was significantly smaller than WS-6. Thickness of leaf lamina, upper epidermis, and palisade mesophyll were increased by heat in WS-1, which might be contributed to the higher assimilation of photosynthates. During nitrogen assimilation, WS-1 possessed the higher nitrogen-related metabolic enzyme activities, including nitrate reductase (NR), glutamine synthetase (GS), glutamate synthase (GOGAT), and glutamate dehydrogenase (GDH), which were reflected by higher photosynthetic nitrogen-use efficiency (PNUE) with respect to WS-6. The total amino acids level had no influence in WS-1, whereas it was reduced in WS-6 by heat. And the proline contents of both wucai genotypes were all increased to respond the heat stress. Additionally, among all treatments, the total soluble sugar content of WS-1 by heat got the highest level, including higher contents of sucrose, fructose, and starch than those of WS-6. Moreover, the metabolism efficiency of sucrose to starch in WS-1 was greater than WS-6 under heat stress, proved by higher activities of sucrose phosphate synthase (SPS), sucrose synthase (SuSy), acid invertase (AI), and amylase. These results demonstrated that leaf anatomical alterations resulted in higher nitrogen and carbon assimilation in heat-tolerant genotype WS-1, which exhibited a greater performance to resist heat stress.
Źródło:
Acta Societatis Botanicorum Poloniae; 2017, 86, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expression patterns of molecular chaperone genes in Antarctic psychrophilic yeast, Glaciozyma antarctica PI12 in response to heat stress
Autorzy:
Yusof, Nur Athirah
Wong, Clemente Michael Vui Ling
Murad, Abdul Munir Abdul
Abu Bakar, Farah Diba
Mahadi, Nor Muhammad
Rahman, Ahmad Yamin Abdul
Zainuddin, Nursyafiqi
Najimudin, Mohd Nazalan Mohd
Powiązania:
https://bibliotekanauki.pl/articles/2041852.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
psychrophile
molecular chaperone
heat-stress
transcriptome
Źródło:
Polish Polar Research; 2019, 40, 3; 273-292
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł

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