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Issledovanie i obosnovanie parametrov lemeshno-otval'nogo kartofelekopatelja s barabannym separatorom kartofel'nogo vorokha

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Grusheckijj S., Firman J.
Motrol. Motoryzacja i Energetyka Rolnictwa
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2015
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tom 17
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nr 1
2

Effect of moderate and high intensity training sessions on cardiopulmonary chemosensitivity and time-based characteristics of response in high performance rowers

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Tomiak T., Mishchenko V., Lusenko E., Diachenko A., Korol A.
Baltic Journal of Health and Physical Activity. The Journal of Gdansk University of Physical Education and Sport
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2014
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tom 06
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nr 3
Background: The present study was performed to clarify fatigue-induced effects of a strenuous and moderate intensity endurance training session on temporary changes of cardiopulmonary (CP) chemosensitivity and fast kinetics response. Material/Methods: Eleven high performance (national level) male rowers participated in this study [age 21.8 ±1.7 (range 18-25 years), 89.3 ±2.0 kg, 190.1 ±1.7 cm, VO2 max 67.9 ±1.1 ml·kg-1·min-1]. The studies involved three steps: 1) a study of effects related to a training session of moderate intensity, 2) effects of a high intensity session, and 3) an impact of a high intensity session on values of peak response. The high intensity session consisted of intermittent training loads made up of five sets of four repetitions of sixty-second work intervals (HR of 149-186 bt·min-1). The moderate intensity session consisted of unvarying type of exercise (HR of 138-167 bt·min-1). Measurements were made at rest before, 13-15, and 37-39 hours after the training session. In rebreathing tests ventilatory sensitivity to CO2 and HR response sensitivity to normocapnic hypoxia were measured. Fast kinetics of ventilation, oxygen uptake, CO2 production and the heart rate were measured in a 5-min standard power test (0.7 VO2 max, 5 min, transition from 25 w) and in a 6-min test (1.12 ±0.11 VO2max). Results: We found that a training session of high intensity resulted in a significant decrease in sensitivity to hypercapnia, an increase in CP sensitivity to hypoxia, a decrease in CP fast kinetics and stability of peak response 13-15 hours after the session vs. baseline. Mean power in a 6-min maximum test decreased, which was mainly determined by a decrease in mean power during the first 3 min and utilization of VO2 max for a 6-min test. Moderate intensity of a training session resulted in an increase in ventilatory sensitivity to hypercapnia whereas sensitivity CP to hypoxia and fast kinetics remained unaffected. Conclusions: These results suggest that not only CP chemosensitivity to hypoxia but also CP chemosensitivity to hypercapnia are variable in high intensity endurance training. The variability related to the effect of fatigue in the recovery phase (up to 15-15 hours) after strenuous training sessions.
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Changes in concentration of saturated fatty acid in milk of high performance Polish Holstein-Friesian cows during the lactation

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Kuczynska B., Puppel K., Klis P., Golebiewski M., Kordyasz M., Wojcik A., Nalecz-Tarwacka T.
Annals of Warsaw University of Life Sciences - SGGW. Animal Science
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2012
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tom 51
The purpose of this study was to examine the influence phase of lactation on the concentration of saturated fatty acid in milk of high performance dairy cows. The experiment was conducted on the twenty PHF cows at experimental dairy farm of the Warsaw University of Life Sciences. The cows were kept in a free-stall dairy shed and fed on TMR (total mixed ration) diet. The cows had continuous access to water, TMR diet was provided for ad libitum intake. Milk samples were collected 10-times during the first 10 month of lactation (once a month). Milk from the initial phase of lactation characterized by the lowest level of saturated fatty acid including: C12:0, C14:0 and C16:0 and the highest level of BA compared with the final period. Stage of lactation significantly influenced the concentration of saturated fatty acids in milk of analyzed cows.
4

Rozdrabniarka do drewna pouzytkowego o duzej wydajnosci

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W K.
Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie
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1998
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tom 39
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nr 4
304-305
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