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19-21
PL
Badano kształtowanie się wartości nacisków prasujących w zależności od parametrów geometrycznych matrycy w procesie brykietowania mieszanki paszowej przeznaczonej dla bydła. Określono jakościowy i ilościowy wpływ współczynnika perforacji oraz długości otworów w matrycy na naciski prasujące, przy różnej wilgotności brykietowanej mieszanki.
EN
Results of investigations on the effect of perforation coefficient and length of holes in the matrix on pressure values in the briquetting process of folder mixture are presented and analyzed in the paper. It has proved that along with increasing the perforation coefficient of the matrix decreas linear pressure values and along with increasing length of holes in the matrix they increas also in linear function. Along with increasing humidity of fodder mixture decreas pressure values.
PL
Przeprowadzono podstawowe badania farmakologiczne nowego związku o działaniu hipoglikemicznym - chlorowodorku N-(3,5,5-trimetylo-2-pirazolino-1-karbonimidoilo)-guanidyny. Badania wykazały, że związek ten charakteryzuje się łagodnym działaniem uspokajającym i spazmolitycznym oraz posiada działanie przeciwzakrzepowe. Nie miał on natomiast wpływu na ciśnienie tętnicze krwi i oddech, a także na wydzielanie żółci i wydalanie moczu. Na tej podstawie można wnioskować, że związek ten działa korzystniej od stosowanego obecnie preparatu Phenformin.
EN
Essential pharmacological studies of the new compound with hypoglycaemic activity - N-(3,5,5-trimethyl-2-pyrazolme-1-carbonimidoyl) guanidine - have been done. The studies have showed that this compound is characterized by sedative, spasmolytic and antithrombotic activity. However, it has no influence on the blood pressure and respiration and also on the bile secretion and urine excretion. Taking it into consideration we ought to conclude, that this compound acts more favourable than Phenformin - actual used preparation.
EN
Carbon dioxide is commonly used to anesthetize the bee queen during instrumental insemination. It can be used both during the insemination procedure, and also to speed up the start of oviposition of instrumentally inseminated queen bees. Anesthesia is not indifferent to the bees’ condition and is unable to reduce the queen latency period to a similar duration as in naturally mated queens. Aside from experiments on bee queens research on worker bees is also conducted because of costs reduction as well as the fact that adverse effects of anesthesia are more pronounced in worker bees than in queens. Therefore the aim of this study carried out on worker bees is to determine the influence of different atmospheric compositions during their awakening from anesthesia. The study was conducted in 2008 in the apiary of the Apiculture Division of the Warsaw University of Life Sciences – SGGW. 3960 Carniolan bees at the age of 2 weeks were studied. All of the 10 bees placed in plastic mail cages were anaesthetized with carbon dioxide for 3 minutes and then awakened in a chamber with a controlled composition of the atmosphere. 33 repetitions were conducted, each of them included 6 groups of the following atmospheric compositions: 1. oxygen 100%; 2. nitrogen 100%; 3. oxygen/nitrogen 30%/70%; 4. oxygen/nitrogen 50%/50%; 5. oxygen/nitrogen 70%/30%; 6. control group, natural composition of atmospheric air. Awakening time was determined by first breathing movements observed and then upon their fully awakening. The awakening of bees after carbon dioxide anesthesia follows a different course in relation to the atmospheric composition during recovery. Awakening in a pure oxygen and pure nitrogen atmosphere significantly prolongs the time to the appearance of the first respiratory movements and the total time to full awakening of bees (in comparison to the control group). Awakening in an atmosphere composed of 70% of oxygen and 30% of nitrogen significantly reduces the time to the appearance of the first respiratory movements and the time of the full awakening of bees. The highest survival rate 14 days after awaking was found in group 5 (70% of oxygen and 30% of nitrogen). The shortest survival rate, (22 days), had bees that awakened in a pure nitrogen atmosphere.
EN
:Effect of mating nucs spacing and subspecies of honey bee (Apis mellifera) on the drifting of queens returning from mating flights. The loss of honeybee queens during mating flights increases the cost of their production. The aim of the study was to examine if the spacing of nucs influences the drifting of queen honey bees which return from mating flights. The study also compared the drifting of Carniolan (A. m. carnica) and Italian (A. m. ligustica) queens. We examined the total of 89 queens which were placed in mating nucs together with about 1000 workers. Some of the mating nucs were arranged in rows spaced 30 centimetres apart, without any landmarks, and other nucs were spaced a few meters apart, next to trees or bushes. Each group of nucs included Carniolan and Italian queens. The results show that significantly more queens failed to return from mating flights to nucs placed in rows without any landmarks (51%) than from those placed next to trees or bushes (7%). The study also showed that there is no significant differences between level of drifting of Carniolan and Italian queens.
PL
Wpływ ustawienia ulików weselnych oraz podgatunku pszczoły miodnej (Apis mellifera) na błądzenie matek powracających z lotów godowych. Straty matek pszczelich podczas lotów weselnych zwiększają koszty ich produkcji. Celem pracy było zbadanie, czy sposób ustawienia ulików weselnych wpływa na błądzenie matek powracających z lotów godowych. Porównano również błądzenie matek kraińskich (A. m. carnica) i włoskich (A. m. ligustica). Ogółem zbadano 89 matek, które znajdowały się w ulikach weselnych z około tysiącem robotnic. Część ulików ustawiono w rzędach w odległości około 30 cm od siebie, a część przy drzewach lub krzewach w odległości kilku metrów. W każdej grupie ulików były matki kraińskie i włoskie. Stwierdzono, że z ulików weselnych ustawionych w rzędzie, bez punktów orientacyjnych ginie, podczas lotów godowych, istotnie więcej matek (51%) niż z ulików ustawionych przy drzewach lub krzewach (7%). Nie stwierdzono istotnych różnic pomiędzy błądzeniem matek kraińskich i włoskich.
EN
Quality of bee queens depends primarily on the age of the brood used to queen rearing. The best queens are obtaining by rearing from the eggs. The aim of the study was to investigate whether the unsealed brood presence in the rearing colonies affects eggs acceptance. To colonies rearing with the unsealed brood there were introduced eggs at the age of 0-18 hours, 24—12 hours and 48-66 hours. After three days the number of built queen cells was verified. When in the colonies was no longer open broods, eggs were introduced to those colonies again and after three days the number of built queen cells was checked. Rearing colonies with unsealed brood accepted 42% of eggs at the age of 0-18 hours, 40% of eggs at the age of 24—12 hours and 51% of eggs at the age of 48-66 hours. Colonies without an open brood accepted 31% of eggs at the age of 0-18 hours, 61% of eggs at the age of 24-42 hours and 78% of eggs at the age of 48-66 hours. It was found that the best accepted eggs were the oldest ones in colonies without unsealed brood.
PL
Wpływ czerwiu otwartego w rodzinach wychowujących na przyjmowanie jaj w różnym wieku. Jakość matek pszczelich zależy przede wszystkim od wieku czerwiu użytego do ich wychowu. Najlepsze matki uzyskuje się przy wychowie z jaj. Celem doświadczenia było zbadanie czy czerw otwarty w rodzinach wychowujących wpływa na przyjmowanie poddawanych jaj. Do rodzin wychowujących z czerwiem otwartym poddano jaja w wieku 0-18 godzin, 24—42 godziny i 48-66 godzin. Po trzech dniach sprawdzono liczbę odciąganych mateczników. Gdy w rodzinach nie było już czerwiu otwartego ponownie poddano do nich jaja i po trzech dniach sprawdzono liczbę odciąganych mateczników. Rodziny wychowujące z czerwiem otwartym przyjęły 42% jaj w wieku 0-18 godzin, 40% jaj w wieku 24—42 godziny i 51% jaj w wieku 48-66 godzin. Rodziny wychowujące bez czerwiu otwartego przyjęły 31% jaj w wieku 0-18 godzin, 61% jaj w wieku 24-42 godziny i 78% jaj w wieku 48-66 godzin. Stwierdzono, że najlepiej przyjmowane są jaja najstarsze w rodzinach bez czerwiu otwartego.
17
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EN
Bee anesthesia has long been widely used in scientific research and for practical purposes. Bee anesthesia is usually induced with carbon dioxide. It is required for such procedures as populating mating hives and cages, introducing queen bees and instrumental insemination. The oxygen to nitrogen ratio may play a very important role in the process of awakening. The aim of the experiment was to investigate the survival rate of worker bees after the application of different concentrations of oxygen and nitrogen in their recovery from anesthesia. The general purpose was to determine the optimal gas mixture for the fastest recovery and the longest survival of bees. The results of this study provide a basis for future experiments on queen bees aimed at accelerating the awakening from anesthesia with carbon dioxide during insemination as well as the initiation of laying eggs. The lowest bee mortality in the first days after awakening from anesthesia was observed in the group awoken in a mixture of 48.6% O₂ and 51.4% N₂, but the highest average survival rate was noted in the group awoken in 60% O₂ and 40% N₂.
EN
The development of industry, intensive agriculture and the automotive industry has contributed to a massive increase in pollution of the environment. The many pollutants accumulating in the environment include toxic elements (Hg, Zn, Cu, Pb, As, Cd) whose natural content in soil and the atmosphere is very small. Honeybees (Apis mellifera L.) are entirely dependent on flowering plants that provide them with nectar and pollen. They also make use of plant buds, from which they collect propolis. Therefore, since 1998 in the Apiculture Department of the Faculty of Animal Science research has been conducted on the content of heavy metals in bee products from all over Poland (108 apiaries, 324 colonies). The content of mercury and lead in propolis, honey and beebread was analysed. The results obtained were satisfactory, as the average mercury content (0.00027 mg/kg) and lead content (0.0485 mg/kg) of honey was low and did not exceed accepted norms in any of the samples tested. Moreover, the average content of mercury (0.00091 mg/kg) and lead (0.2885 mg/kg) in the beebread did not exceed the norms in any of the samples. The only product in which the average content of mercury (0.00491 mg/kg) and lead (9.6621 mg/kg) exceeded the norm was propolis. The results show that in most areas of Poland there is no danger of contamination of bee products with mercury and lead. Our findings and a review of the results of other authors clearly indicate that bee products such as propolis, honey and beebread can be used as bioindicators of environmental pollutants such as heavy metals.
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