Ograniczanie wyników

Czasopisma help
Autorzy help
Lata help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 35

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  water intake
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The aim of this study was to determine the amount of water intake of the chinchilla in a day and to check whether addition of herbal formula with an intense aroma and sweet taste to the water will affect the amount of water intake. Based on our experience it can be concluded that there are large differences in daily water intake between individuals in the sample and individual differentiation is the only factor that influenced the occurrence of differences. Other factors such as gender or provision of hay, did not affect significantly (statistically significant) on water intake. Experience has shown that there are highly significant differences in the consumption of water by the same animals before and after addition of the herbal preparation with a sweet taste. However, the addition of compounds, or drugs in the water requires the prior observation of the animal and determine the quantity of water consumed by it, due to the large differences between individuals. The study, which would give the answer if we should continue researching whether the sex, weight, age or other factors can affect the intake of the water by the chinchilla.
Background. Fluid intake in elderly is more important than in younger individuals, because compromised homeostatic mechanisms such as loss of the thirst sensation can result in dehydration. Objective. The aim of the present study was the assessment of water intake from food and beverages by free-living elderly in Poland. Materials and Methods. The study was conducted on 138 volunteers (women and men) at the age of 60 to 90, recruited from Warsaw and Płock Universities of the Third Age and different informal groups from the same cities. Food and beverages consumption data were collected using the method of records for 3 days, including two weekdays and one week-end day, in the period April – June 2012. Results. Average values of total water intake in the present study indicated that women meets of the European Food Safety Agency recommendations (2000 mL/day), but men did not (less about 200 mL/day than the recommended 2500 mL/day). Taking into account the criterion of water per energy intake (mL/kcal) 51% of women and 75% of men did not meet the recommendation. Conclusions. Continuation of the careers and/or participation in Universities of the Third Age contributed to less intake of water from beverages, what in turn affected the total water intake. The elderly leading an active life (working, studying) may be a risk group vulnerable to dehydration, so monitoring is needed.
Leptin interplays with other peptides to control feeding behaviour in humans and animals. Using exendin-4, an agonist of glucagon-like peptide-1, we investigated whether leptin modifies its effect on food intake in the rat. In the first series, exendin-4 alone (0.1, 2 or 10 µg per rat), leptin alone (0.1, 2, 10 or 100 µg per rat) or exendin-4 and leptin together (0.1 + 0.1, 2 + 2, 10 + 10, or 2 + 100 µg per rat, respectively) were injected once intraperitoneally. In the second series animals were injected either with exendin-4 (2 µg) alone, leptin (10 µg) alone, or leptin (10 µg) + exendin-4 (2 µg) daily for 5 subsequent days. At the lowest dose used, leptin and exendin-4 injected once together, but not separately, reduced significantly a 24-hour food intake. When used in higher doses, however, leptin did not change the exendin-4-dependent suppressory effect on food consumption. No significant differences in food intake were seen between rats treated repeatedly with exendin-4 only and animals injected with both drugs. Hence, leptin and exendin-4 may act additively to inhibit appetite when present in low concentrations while, at high leptin doses, this effect is abolished. The lack of synergistic effects of exendin-4 and high leptin concentrations on food intake may explain, at least in part, mechanisms responsible for leptin resistance in subjects with hyperleptinaemia.
Puciłowski O., Trzaskowska E., Jankowska E., Kostowski W., Kupryszewski G.: Effects of intra-amygdaloid TRH injections on motor activity and dominant-submissive behavior in rats competing for water. Acta Physiol. Pol. 1990, 41(1-3); 71-77. The effect of thyrotropin releasing hormone (TRH) microinjections into the central amygdala (10 g in 0.5 1 into each side) on locomotor activity, water intake and dominance behavior in a water competition test was investigated in male Wistar rats. TRH increased the general motility without altering the number of rearings. Intra-amygdaloid TRH injection to submissive rats resulted in a loss ol subordinate position in these animals in the water competition test. A tendency to decrease dominance followed the injection оf the peptide to the dominant animals. The effect of TRH in the dominance test does not appear to involve influence on the thirst drive as microinjection of the peptide did not change significantly the water consumption in thirsty rats.
Test was done on Arkonka underground water intake. To perform it, it was constructed the model station composed of the closed gravity filter, oxygen supply system, water supply system and a mixer. For needs of the experiment it was determined the iron reduction degree, manganese reduction degree, pH determination, determination of the oxygen contents in treated water. The above determinations were to be helpful in analysis of that innovatory technology. The background for the comparison were the results of the above determinations for the aeration – filtration technological line in use on Arkona water intake. That comparison comprised the analysis of the reductive effectiveness of the particular methods with the comparison of the costs of their industrialscale operation.
9
Content available remote

Enhanced food and water intake in renin transgenic rats

72%
In short term experiments angiotensin II (Ang II) is a potent stimulant of thirst, however it is not known whether prolonged activation of the renin-angiotensin system is associated with chronic alteration of water or food intake. Renin transgenic rats TGRmRen(2)27 (TGR) exhibit significant elevation of AngII in the brain regions involved in regulation of body fluid balance. The purpose of the present study was to find out whether TGR rats manifest also different water (WI) and food (FI) intake and renal excretory functions in comparison to their parent Sprague Dawley (SD) strain. To this end 24h WI and FI as well as urine excretion (Vu) and urinary outputs of solutes (Cosm), sodium (UNaV) and potassium (UKV) were compared under baseline conditions in 16 TGR and 15 SD rats having free access to water and food. In 15 TGR and 17 SD rats effect of 24h dehydration on water intake was investigated. Under baseline conditions TGR rats consumed significantly greater amount of food and water than SD rats. Vu, UNaV and UKV were not significantly different in both strains. Cumulative water intakes in SD and TGR rats subjected to 24h dehydration did not differ. The results reveal that under baseline conditions TGR rats manifest greater food and water intakes than SD rats whereas stimulation of thirst by water deprivation is similar in both strains. The results suggest that the ingestive behavior may be chronically altered by upregulation of the renin-angiotensin system.
W pracy wykorzystano wyniki badań terenowych, polegających na pomiarze wilgotności gleby, wykorzystując technikę TDR, które pozwoliły na wyznaczenie poboru wody przez korzenie kukurydzy. Przeanalizowano możliwość zastosowania równania Richardsa do opisu ruchu wody w badanej przestrzeni gleby. W równaniu tym pobór wody przez roślinę uwzględniono jako człon źródłowy, którego wielkość wyznaczono na podstawie badań terenowych. Równanie Richardsa rozwiązano w przestrzeni trójwymiarowej za pomocą metody różnic skończonych.
Działalność przemysłowa wpływa bezpośrednio na środowisko. Przykładem tego jest wpływ ujęć wód podziemnych na warunki hydrogeologiczne. Kluczowym elementem tego zagadnienia jest wybór optymalnej lokalizacji projektowanego ujęcia. Przedstawiany artykuł opisuje wielokryterialną ocenę różnych wariantów lokalizacji ujęcia wód podziemnych. Woda z projektowanego ujęcia będzie dostarczana do oczyszczalni ścieków w Częstochowie do celów technologicznych. W celu zaprojektowania odpowiedniej studni głębinowej spełniającej określone wymagania przeprowadzono obliczenia analityczne m.in. promienia leja depresji i głębokości depresji, izochromy 25 lat oraz ustalono wytyczne dla projektu studni. Wykonano również wykres zwierciadła wód podziemnych podczas interakcji z ujęciem. Rezultatem wyżej wymienionych obliczeń było określenie zasięgu leja depresji oraz wybór wariantu budowy dwóch studni w ramach jednego ujęcia wód podziemnych. Dzięki wykonanej analizie zweryfikowano możliwości wspomagania procesu podejmowania szybkich i racjonalnych decyzji dla dużych obszarów, gdzie występuje wiele czynników wpływu na wydajność studni głębinowej.
Dokonano analizy mikrobiologicznej wody pobranej z ująć па terenie miasta Łodzi (wody źródlane, studnie głębinowe) pobieranej do celów konsumpcyjnych przez masowo odwiedzających je mieszkańców. Porównano jakość mikrobiologiczną wody bezpośrednio po pobraniu i po jej przechowywaniu w temperaturze 0-4 °С oraz w temperaturze pokojowej.
Określono ilościowo stężenia radonu 222Rn w wodzie z ujęć głębinowych na terenie Warszawy. Pomiary wykonano metodą ciekłej scyntylacji cząstek alfa. Przeprowadzono analizę otrzymanych wyników w odniesieniu do proponowanych limitów stężenia radonu 222Rn w wodzie do picia oraz podjęto próbę oszacowania otrzymanych dawek promieniowania jonizującego przez osoby spożywające tę wodę.
The water intake situated at Rybacka Street in Wolin was established in the beginning of the 20th century. It is situated in the close vicinity of the existing apartment and business buildings and the water and sewage systems as well. On the fenced parcel ca 50x80 m besides the objects of: – building of the water-supply station, – warehouse – workshop building with sanitary facilities, – household building, – building of the current generating plant, are situated the deep-water wells No. 6 and No. 9 now in the operational use. The other deep-water wells being now in the operational use are the well No. 10 situated at Rybacka Street in the distance ~ 90 m from the intake parcel border as well as the well No. 5 situated in the distance ~ 220 m from the parcel border.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.