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Wyszukujesz frazę "temperature effect" wg kryterium: Temat

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Wyświetlanie 1-15 z 57
Tytuł:
Effects of temperature during ultrasonic conditioning in quartz-amine flotation
Autorzy:
Gungoren, C.
Ozdemir, O.
Ozkan, S. G.
Powiązania:
https://bibliotekanauki.pl/articles/110129.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
quartz
amine
flotation
ultrasound
temperature effect
Opis:
In this study, the effect of ultrasound on flotation recovery of quartz-amine flotation was investigated in terms of temperature influence. For this purpose, an ultrasonic probe was used for conditioning quartz surfaces in presence of dodecylamine hydrochloride (DAH), and the change in the temperature was recorded. The temperature-controlled ultrasonic conditioning tests were also carried out at various ultrasonic powers (30, 90, and 150 W) to investigate the effect of increasing temperature on the quartz-DAH flotation. The results showed that temperature of the suspension sharply increased from 23 up to 75 °C at the end of 10 min of conditioning at 150 W ultrasonic power. The flotation results for the temperature controlled and uncontrolled samples indicated that the flotation recovery increased from 45 to 65% by 90 W ultrasonic power. However, higher ultrasonic power levels affected the flotation recovery negatively. On the other hand, the ultrasonic application decreased the flotation recovery at all ultrasonic power levels in the temperature-controlled tests. Finally, the shape analysis was also performed for the particles treated with the ultrasound at various ultrasonic powers. As a conclusion, the positive effect of ultrasound on the quartz-amine flotation recovery could be related to temperature increase during conditioning.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 2; 687-698
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of temperature on breakdown voltage of 10 MeV electron beam irradiated LDPE and HDPE
Autorzy:
Borhani, M.
Ziaie, F.
Bolorizadeh, M.
Mirjalili, G.
Powiązania:
https://bibliotekanauki.pl/articles/146157.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
breakdown voltage
dielectric constant
temperature effect
electron beam
low-density polyethylene
Opis:
The paper presents measurements of the breakdown (dielectric strength) and dielectric constant of the low density polyethylene (LDPE) and high density polyethylene (HDPE) thin sheets, which were irradiated with a 10 MeV electron beam in the range of 0-470 kGy using a Rhodotron accelerator system. The tests were performed at temperatures ranging from 20°C to 110°C. Variation of the measured parameters vs. radiation absorbed dose and temperature were discussed.
Źródło:
Nukleonika; 2006, 51, 3; 179-182
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of temperature and soluble solids content on the viscosity of cherry juice concentrate
Autorzy:
Juszczak, L.
Fortuna, T.
Powiązania:
https://bibliotekanauki.pl/articles/26465.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
viscosity
temperature effect
juice concentrate
cherry juice
rheological behaviour
food quality
Źródło:
International Agrophysics; 2004, 18, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The colonization of hot water systems by Legionella
Autorzy:
Hruba, L
Powiązania:
https://bibliotekanauki.pl/articles/50226.pdf
Data publikacji:
2009
Wydawca:
Instytut Medycyny Wsi
Tematy:
Legionella pneumophila
hot water system
temperature effect
legislation
water temperature
building type
safety factor
Źródło:
Annals of Agricultural and Environmental Medicine; 2009, 16, 1; 115-119
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical identification of Preisach distribution function including temperature effects
Autorzy:
Chelghoum, Leila
Powiązania:
https://bibliotekanauki.pl/articles/2086685.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnetic hysteresis
Preisach distribution function
Preisach model
soft ferromagnetic materials
temperature effect
Opis:
Magnetic hysteresis occurs in most electrical engineering devices once soft ferromagnetic materials are exposed to relatively high temperatures. According to several scientific studies, magnetic properties are strongly influenced by temperature. The development of models that can accurately describe the thermal effect on ferromagnetic materials is still an issue that inspires researchers. In this paper, the effect of temperature on magnetic hysteresis for ferromagnetic materials is investigated using a self-developed numerical method based on the Preisach distribution function identification. It employs a parameter depending on both temperature and the Curie temperature. This approach is of the macroscopic phenomenological type, where the variation of the magnetization (in direct connection with the Preisach triangle) is related to the observed macroscopic hysteretic behavior. The isotropic character of the material medium is predominant. The technique relies on a few experimental data extracted from the first magnetization curve provided by metallurgists. The ultimate goal is to provide a simple and robust magnetic behavior modeling tool for designers of electrical devices. Temperature is introduced at the stage of identifying the distribution function of the Preisach model. This method is validated by the agreement between the experimental data and the simulation results. The developed method is very accurate and efficient in modeling the hysteresis of ferromagnetic materials in engineering particularly for systems with ferromagnetic components and electromagnetic-thermal coupling.
Źródło:
Archives of Electrical Engineering; 2022, 71, 2; 297--309
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of temperature on guaiacol peroxidase of Pyrus communis
Autorzy:
Saeidian, S.
Ghasemifar, E.
Powiązania:
https://bibliotekanauki.pl/articles/10793.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
temperature effect
guaiacol
Peroxidase
Pyrus communis
enzyme
plant growth
plant development
cell wall
Opis:
Peroxidase (EC 1.11.1.7; donor: hydrogen-peroxide oxidoreductase, POD) is one of the key enzymes controlling plant growth, differentiation and development. The enzyme participates in construction, rigidification and eventual lignification of cell walls, biosynthesis of ethylene from 1-aminocyclopropane-1-carboxylic acid and H2O2, regulation of auxin level through auxin catabolism, protection of tissue from damage and infection by pathogenic microorganisms, the oxidation of indoleacetic acid. For peroxidase activity in wild pears extract one pH optimum was observed at 6.5 that probably belong to atleast one isoenzyme. Activity of peroxidase in presence of guaiacol and H2O2 was optimum after incubation at 40 °C. Maximum activity of peroxidase is 300 % .Activity increased to 240 %, 300 %, 70 % and 10 % after 60 minute incubation at 30, 40, 45 and 60 °C for peroxidase. Incubation at high temperature (70 °C) was accompanied with decrease of activity to 10 % peroxidase activity.
Źródło:
International Letters of Natural Sciences; 2013, 05
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kompensacja wpływu zmiany temperatury na pracę sensorów w mostkowym modulatorze kwadraturowym
Compensation of temperature effect on sensor operation used in
Autorzy:
Rylski, A.
Powiązania:
https://bibliotekanauki.pl/articles/155056.pdf
Data publikacji:
2006
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
mostek niezrównoważony
kompensacja temperaturowa
modulacja kwadraturowa
unbalanced bridge
compensation of temperature effect
Quadrature Modulator
Opis:
W artykule opisano kompensację wpływu zmiany temperatury sensorów na ich sygnał w układach modulacji kwadraturowej z mostkiem Wiena do jednoczesnego pomiaru sygnałów z dwóch czujników rezystancyjnych.
The possibility compensation of temperature effect on sensor signals in Wiena bridge Quadrature Modulator used for simultaneous measurement of signal from two resistance sensors is presented.
Źródło:
Pomiary Automatyka Kontrola; 2006, R. 52, nr 12, 12; 30-33
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature Effect on Performance of Different Solar Cell Technologies
Autorzy:
Adeeb, Jehad
Farhan, Alaa
Al-Salaymeh, Ahmed
Powiązania:
https://bibliotekanauki.pl/articles/124356.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
solar cell
photovoltaics
temperature effect
multicrystalline silicon solar cell
amorphous silicon solar cell
monocrystalline
Opis:
One of the main parameters that affect the solar cell performance is cell temperature; the solar cell output decreases with the increase of temperature. Therefore, it is important to select the proper solar cell technology that performs better at a specified location considering its average temperatures. In addition, the solar cell performance is directly reflected on the overall economics of the project. This paper is proposed to evaluate the variations in the performance of different solar cell technologies related to the temperature in Amman, Jordan. Field data of weather station and three PV systems (Poly-crystalline, Mono-crystalline and Thin-film) of identical design parameters were collected from Test Field Project at Applied Science Private University, Shafa Badran, Amman, Jordan. These data were analysed in the following way. estimated specific energy yield (kWh/kWp) for the three different PV systems was calculated depending on the measured value of solar irradiance and technical specifications of the installed solar panels and inverters, then the actual energy yield at different temperatures over one year was compared with the estimated value, so the deviations could be determined and actual temperature coefficients for energy yield could be calculated, knowing that the three PV Systems have identical design parameters (tilt angle, azimuth angle, type and dimensions of mounting structure and inverter size) and same cleaning method and schedule. It was found that the thin-film solar panels are less affected by temperature with temperature coefficient of -0.0984%, and -0.109%, -0.124% for Mono-crystalline and Poly-crystalline respectively. These results can be implemented in the preliminary design steps, specifically in the selection of the solar cell technology to be installed in a specific location.
Źródło:
Journal of Ecological Engineering; 2019, 20, 5; 249-254
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature effect on frequencies of a tapered triangular plate
Autorzy:
Khodiya, Akash
Sharma, Amit
Powiązania:
https://bibliotekanauki.pl/articles/1839862.pdf
Data publikacji:
2021
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
temperature effect
triangle plate
frequency
vibration
częstotliwość
wibracja
metoda Rayleigha-Ritza
gradient termiczny
efekt temperaturowy
Opis:
The two dimensional temperature effect on the vibration is computed for the first time for a clamped triangular plate with two dimensional thickness. In the study we focused on isosceles, right-angled and scalene triangles only. The first three modes of vibration are computed on different variations of plate parameters using the Rayleigh-Ritz method. The objective of the study is to reduce the frequency of the plates. A comparative study of the frequencies with other available results well presents the objective of the study.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2021, 20, 1; 37-48
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of temperature and humidity on the grazing activity of Deroceras reticulatum (O. F. Muller, 1774) and the damage to rape plants
Autorzy:
Kozlowski, J.
Jaskulska, M.
Kaluski, T.
Kozlowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/83902.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:
temperature effect
humidity
grazing activity
Deroceras reticulatum
damage
rape plant
winter rape
slug
yield loss
environmental factor
air temperature
Opis:
Winter rape is susceptible to damage caused by D. reticulatum (O. F. Müller) mainly in the early phases of the plants’ development. The degree of damage and the size of yield losses depend on the slug population and the grazing activity, which are governed by many environmental factors. Laboratory studies were performed to analyse the rate and amount of damage to rape plants (2–3 leaf stage) caused by D. reticulatum, and the effect of temperature and soil humidity on the slug’s grazing activity. With increasing air temperature (up to 16°C) the amount of damage increased, but the effect was not lasting. The slugs were also active at low temperatures (+1°C), and although their grazing was less intense, the amount of damage after seven days could reach an average of 34%. In laboratory tests, the soil humidity had no marked effect on the amount of damage done by the slugs.
Źródło:
Folia Malacologica; 2011, 19, 4
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of temperature on oxidative stress induced by lead in the leaves of Plantago major L.
Autorzy:
Balakhnina, T.I.
Borkowska, A.
Nosalewicz, M.
Nosalewicz, A.
Wlodarczyk, T.M.
Kosobryukhov, A.A.
Fomina, I.R.
Powiązania:
https://bibliotekanauki.pl/articles/24178.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
temperature effect
oxidative stress
lead
heat stress
oxidative destruction
leaf
Plantago major
ascorbate peroxidase
glutathione reductase
Źródło:
International Agrophysics; 2016, 30, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effects of temperature on the dormancy and germination of Cirsium arvense [L.] Scop. seeds
Autorzy:
Bochenek, A
Golaszewski, J.
Piotrowicz-Cieslak, A.I.
Gorecki, R.J.
Powiązania:
https://bibliotekanauki.pl/articles/57089.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
weed
stratification
weed seed
seed
seed dormancy
life cycle
dormancy
temperature effect
afterripening
Cirsium arvense
germination
perennial species
Opis:
The ecophysiological regulation of seed dormancy in perennial species and those with a varied life cycle has not been studied in detail yet. That is why an attempt has been made to determine the Cirsium arvense seed water relations during stratification and afterripening at different temperatures and germination at constant or fluctuating temperatures on the basis of the hydrotime model. The obtained results showed that breaking of the primary dormancy of achenes took place only during the first stratification month at moderate temperatures, mainly due to an increase in the average water-stress tolerance in a seed population. The induction of secondary seed dormancy during after-ripening at all temperatures resulted mostly from a substantial loss of the seeds' ability to tolerate water stress. Fluctuating temperatures affected neither seed germination nor the hydrotime model parameters. The analysis of the variations of hydrotime model parameters allows a better understanding of the physiological basis of seed dormancy relief and induction.
Źródło:
Acta Societatis Botanicorum Poloniae; 2009, 78, 2; 105-114
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphologial variation in colonies of Chalara fraxinea isolated from ash (Fraxinus excelsior L.) stems with symptoms of dieback and effects of temperature on colony growth and structure
Zróżnicowanie morfologiczne kolonii Chalara fraxinea wyizolowanych z jesionów (Fraxinus excelsior L.) z objawami zamierania oraz wpływ temperatury na ich wzrost i strukturę
Autorzy:
Kowalski, T.
Bartnik, C.
Powiązania:
https://bibliotekanauki.pl/articles/28411.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
morphological variation
colony
Chalara fraxinea
isolation
ash
Fraxinus excelsior
stem
dieback symptom
temperature effect
colony growth
colony structure
Opis:
The present paper presents the results of long-term observations of differences in growth and morphology of colonies of C. fraxinea isolated from ash stems with symptoms of dieback and the results of studies on effects of temperature on growth and morphology of colonies in vitro. Thirty randomly chosen C. fraxinea cultures, originating from six Forest Districts in southern and northern Poland, viz. Andrychów, Gryfice, Kańczuga, Lębork, Miechów and Mircze, were included in the temperature assay. Colony growth and morphology were evaluated in vitro, on malt extract agar. Two replicates of each isolate were incubated at 5, 10, 15, 20, 25 and 30oC in darkness. Colonies of C. fraxinea isolated from necrotic stem tissues of diseased ash trees differed greatly in colour, structure, growth rate, presence of sectors and stromata as well as the intensity of conidial sporulation. Colony characters were often lost in further sub-cultures grown on the same medium. Colonies of C. fraxinea grew at 5-25oC in vitro. Three isolates still grew, though slowly, at 30oC. The optimum temperature for growth was 20oC. Among 30 isolates tested, five grew most quickly at 25oC and four at 15oC. Differences among colony diameters recorded at 5, 10, 15, 20 and 30oC were statistically significant, while differences at 15 and 25oC were not. At some temperatures, statistically significant differences in growth rate were related to the origin of the isolates. There were three main colony colour types. Temperature was the main factor affecting colony morphology in vitro. The formation of sectors was observed in 36% of colonies, pseudoparenchymatous stromata in 10.4% of colonies, and white crystalline substances in 53.3% of colonies. The results of in vitro observations were used for discussion of the effects of temperature on growth and activity of C. fraxinea in vivo.
Źródło:
Acta Agrobotanica; 2010, 63, 1
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cointegration method for temperature effect removal in damage detection based on Lamb waves
Wykrywanie uszkodzeń przy pomocy fal Lamba - kompensacja wpływu temperatury oparta o metodę kointegracji
Autorzy:
Dao, P. B.
Powiązania:
https://bibliotekanauki.pl/articles/328179.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
structural health monitoring
Lamb waves
cointegration
temperature effect removal
wykrywanie uszkodzeń
konstrukcja
fale Lamba
kointegracja
kompensacja wpływu temperatury
Opis:
The paper presents an application of the cointegration technique for temperature effect removal in Lamb wave data. The method is based on the analysis of cointegration residuals and stationary statistical characteristics. The experimental results on Lamb wave responses from undamaged and damaged aluminium plates show that the cointegration process can remove undesired temperature effects and accurately detect damage.
Fale Lamba stosowane są do wykrywania uszkodzeń w konstrukcjach płytowych. Wpływ temperatury na amplitudę oraz fazę fal Lamba jest jedną z głównych przeszkód w powszechnym zastosowaniu tej metody w praktyce inżynierskiej. W pracy zastosowano metodę kointegracji do kompensacji wpływu temperatury na propagację fal Lamba. Metoda oparta jest na badaniu stacjonarności sygnałów. Zastosowane podejście pokazane jest na przykładzie wykrywania szczelin zmęczeniowych w płytach aluminiowych. Wyniki pokazują, że metoda kointegracji skutecznie usuwa z fal Lamba wszystkie efekty związane z wpływem temperatury, przyczyniając się do wykrycia badanych uszkodzeń.
Źródło:
Diagnostyka; 2013, 14, 3; 61-67
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Najnowsze rozpoznanie parametrów eksploatacyjnych wód termalnych w ujęciu Chochołów PIG-1 w aspekcie efektu wygrzewania się otworu
Newest recognition of exploitation parameters based on Chochołów PIG-1 borehole in the aspect of temperature effect
Autorzy:
Bielec, B.
Operacz, A.
Powiązania:
https://bibliotekanauki.pl/articles/399826.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
wody termalne
parametry hydrogeologiczne
niecka podhalańska
efekt wygrzewania się otworu
geothermal waters
hydrogeological parameters
Podhale basin
borehole temperature effect
Opis:
W obszarze niecki podhalańskiej funkcjonuje kilkanaście otworów hydrogeologicznych ujmujących wodę termalną. Jednym z nich jest otwór Chochołów PIG-1 eksploatowany na potrzeby kompleksu rekreacyjnego Chochołowskie Termy. W listopadzie 2017 roku przeprowadzono w przedmiotowym otworze badania hydrogeologiczne w celu korekty podstawowych parametrów hydrogeologicznych związanych z eksploatacją ujęcia tj. jego zasobów eksploatacyjnych i dopuszczalnego obniżenia zwierciadła wód termalnych. Szczególną uwagę zwrócono na warunki wygrzewania się otworu. Wyniki pompowania pomiarowego pozwoliły głębiej poznać warunki występowania wód termalnych ujmowanych przedmiotowym otworem.
In the Podhale basin there are several hydrogeological boreholes that cover geothermal water. One of them is the Chochołów PIG-1 well used for the needs of the Chochołowskie Termy recreation complex. In November 2017, tests were carried out in the well in order to establish the basic hydrogeological parameters related to exploitation of the intake, i.e. to determine its operational resources and permissible lowering of the groundwater table. Particular attention was paid to the conditions of the borehole tmperature effect.The results of the conducted measuring pumping allowed to get to know more deeply the conditions of occurrence of thermal waters captured by the borehole.
Źródło:
Inżynieria Ekologiczna; 2018, 19, 6; 145-152
2081-139X
2392-0629
Pojawia się w:
Inżynieria Ekologiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
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