Temat: paw - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Dynamics of wear of the cutting elements of tillers
Dynamika zużycia elementów kultywatora pracujących w glebie
Autorzy:: Dudnikov, A.
Belovod, A.
Pasyuta, A.
Gorbenko, A.
Kelemesh, A.
Powiązania:: https://bibliotekanauki.pl/articles/56172.pdf
Data publikacji:: 2015
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: cultivator paw
deformation
technological process
dynamics
wear rate
cutting element
Opis:: The paper discusses theoretical studies of wear of the cutting elements of working bodies of tillers to develop their technological process of hardening, providing on the one hand increase their longevity, and with another - providing quality tillage. It shows the dependence of the wear rate on the length of the cutting edge cultivator paws. The interaction of the blade working organs of tillers of the soil with the environment was characterized. The diagram of the forces acting on the blade body and working movement direction in the soil was given. The analysis presents dependence between the linear wear lancet cultivators paw thickness and such factors as the way of friction, normal specific dynamic pressure of the soil, the hardness of the material clutches, friction area. The paper shows the effect of the angle between the polar axis and the radius of curvature of the cutting edge of the blade cultivator paws on the value of its wear. The regularities of changes in the intensity of wear feet are observed along the length of its cutting edge.
elementów kultywatora pracujących w glebie. W artykule przedstawiono teoretyczne rozważania dotyczące zużycia elementów kultywatora, które pracują w glebie. W tym kontekście celem podjętych rozważań było wskazanie na czynniki doskonalenia procesu utwardzania powierzchni elementów roboczych, a w efekcie wydłużenia czasu ich pracy i jakości realizacji zadań roboczych kultywatora. Wskazano na zależność stopnia zużycia od długości krawędzi tnącej zębów roboczych. Przedstawiono problemy interakcji między elementami roboczymi kultywatora i środowiskiem glebowym. Zaprezentowano wykres sił działających na ostrze redlicy w glebie w powiązaniu z kierunkiem ruchu narzędzia. Analiza obejmowała zależność między zużyciem łukowej części łapy kultywatora i takimi czynnikami, jak kierunek sił tarcia, stopień ugniecenia gleby, sprężystość zębów i obszar tarcia. W artykule rozwinięto kwestię wpływu kąta osi ustawienia zęba i promienia krzywizny redlicy podcinającej kultywatora na wielkość zużycia powierzchni roboczej. Regularność zmian intensywności zużycia łap kultywatora jest obserwowana wzdłuż długości krawędzi tnącej.
Źródło:: Annals of Warsaw University of Life Sciences - SGGW. Agriculture; 2015, 65 Agric.Forest Eng.
0208-5712
Pojawia się w:: Annals of Warsaw University of Life Sciences - SGGW. Agriculture
Dostawca treści:: Biblioteka Nauki

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Tytuł:: The effects of radio-frequency radiation (RFR) exposure on the analgesic efficacy of morphine in healthy rats and rats with inflammation
Autorzy:: Bodera, Paweł
Antkowiak, Bożena
Paluch, Małgorzata
Sirav, Bahriye
Siwicki, Andrzej K.
Stankiewicz, Wanda
Powiązania:: https://bibliotekanauki.pl/articles/2161960.pdf
Data publikacji:: 2019-07-15
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:: inflammation
rats
morphine
pain perception
radio-frequency radiation
paw withdrawal latency
Opis:: Objectives The aim of this study, conducted at the Military Institute of Hygiene and Epidemiology in Warsaw in 2017, was to evaluate the effects of a single (15 min) and repeated (5 times for 15 min) radio-frequency radiation (RFR) exposure of 1800 MHz frequency on the analgesic efficacy of morphine in healthy rats and rats with complete Freund’s adjuvant (CFA) induced inflammation. Material and Methods Rats were injected intraperitoneally with morphine (MF) in the dose of 8 mg/kg or drug vehicle 15 min before RFR exposure. The authors used the plantar analgesia meter and the radiant heat paw-withdrawal test to assess the pain threshold. Results A single RFR exposure slightly influenced paw withdrawal latency (PWL) in healthy rats in the single exposure baseline group, and influenced PWL, 30 and 60 min after morphine or vehicle injection, in the repeated exposure group. There were differences between the sham-exposed groups (vehicle), 30, 60 and 90 min after injection, both in the single and repeated RFR-exposure groups. The antinociceptive effect of morphine in healthy rats was slightly decreased by RFR exposure at 60 and 90 min, both in the single and repeated exposure groups. The PWL was slightly decreased, both in the single and repeated exposure groups with inflammation (CFA and CFA/MF), at 30, 60 and 90 min, and PWL was increased in the sham-exposed groups (CFA and CFA/MF), both in the single and repeated exposure groups, at 30, 60 and 90 min. The antinociceptive effect of morphine in healthy rats was significantly increased by RFR exposure at 30 min after drug injection in the single exposure group, and increased at 30 and 60 min in the repeated exposure group. Conclusions The authors observed a minor influence of RFR exposure on the antinociceptive effects of morphine in healthy rats after repeated exposures and a statistically significant influence of repeated exposure on morphine mediated antinociceptive effects in the inflammation group. Int J Occup Med Environ Health. 2019;32(4):465–74
Źródło:: International Journal of Occupational Medicine and Environmental Health; 2019, 32, 4; 465-474
1232-1087
1896-494X
Pojawia się w:: International Journal of Occupational Medicine and Environmental Health
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Novel Aryl/Alkyl Azole Derivates as an anti-nociceptive and anti-inflammatory drug candidates
Autorzy:: Kaya-Yasar, Yesim
Barut, Elif N.
Engin, Seckin
Dogan, Inci S.
Sezen, Feride S.
Powiązania:: https://bibliotekanauki.pl/articles/895330.pdf
Data publikacji:: 2020-04-29
Wydawca:: Polskie Towarzystwo Farmaceutyczne
Tematy:: pain
inflammation
aryl/alkyl azole
COX-LOX
formalin-induced hind paw edema test
hot plate test
Opis:: Novel aryl/alkyl azole derivative compounds C1 and C2 were screened for in vivo anti-nociceptive and anti-inflammatory activities by using the hot plate test and formalin-induced hind paw edema test, respectively. Ability of these compounds to inhibit cyclooxygenase-1/2 (COX-1/2) and 5/15-lipoxygenase (5/15-LOX) were evaluated in vitro by using a colorimetric method. C1 (30 and 50 mg/kg, i.p.) and C2 (3 and 30 mg/kg, i.p.) increased the latency to withdrawal in the hot plate test, indicating an anti-nociceptive activity. C1(30 and 50 mg/kg) and C2 (3,30 and 50 mg) were able to decrease formalin-induced edema, indicating their anti-inflammatory properties. C1 and C2 exhibited inhibitory effects on the activity of COX(1-2) and 15-LOX. However, neither C1 nor C2 showed an inhibitory effect on 5-LOX. This study demonstrates that C1 and C2 have anti-nociceptive and anti-inflammatory activities, that is partially mediated by inhibition of COX and LOX enzymes. Our results suggest that C1 and C2, novel aryl/alkyl azole compounds, could serve as lead compounds to develop novel therapeutic options for the treatment of pain and inflammation.
Źródło:: Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 2; 289-294
0001-6837
2353-5288
Pojawia się w:: Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Probability of Ship on Collision Courses Based on the New PAW Using MMG Model and AIS Data
Autorzy:: Asmara, I.P.S.
Kobayashi, E.
Artana, K.B.
Powiązania:: https://bibliotekanauki.pl/articles/116367.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Modeling of Maneuvering of Ships
Crash Astern Maneuvers
anticollision
mathematical model
Maneuvering
Potential Area of Water (PAW)
Automatic Identification System (AIS)
AIS Data
Opis:: This paper proposes an estimation method for ships on collision courses taking crash astern maneuvers based on a new potential area of water (PAW) for maneuvering. A crash astern maneuver is an emergency option a ship can take when exposed to the risk of a collision with other ships that have lost control. However, lateral forces and yaw moments exerted by the reversing propeller, as well as the uncertainty of the initial speed and initial yaw rate, will move the ship out of the intended stopping position landing it in a dangerous area. A new PAW for crash astern maneuvers is thus introduced. The PAW is developed based on a probability density function of the initial yaw rate. Distributions of the yaw rates and speeds are analyzed from automatic identification system (AIS) data in Madura Strait, and estimated paths of the maneuvers are simulated using a mathematical maneuvering group model.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 1; 43-50
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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