Ograniczanie wyników

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

Znaleziono wyników: 48

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 3 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  Cucurbita maxima
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 3 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
High dry matter content in fruit of winter squash influences their durability and prolongs the storage time. The forms of winter squash with a higher dry matter content in fruits are also characterized by a higher sugar content and are a valuable raw material for processing industry. The goal of the work was to study the variability of dry matter content in fruits of selected winter squash (Cucurbita maxima Duch.) forms in two following years of research. 12 forms of winter squash: 6 cultivars and 6 lines of different origin, differentiated in respect of the character studied were the material for research. The plants were grown in the experimental field of WAU, Wolica, in two successive years: 2003 and 2004. The fruits were harvested at the end of September and stored. In the middle of November the samples were taken and the content of dry matter was determined by drying the tissue at the temp. 105°C. The particular forms differed considerably from each other in respect of dry matter content in fruits. The line 801, characterized by very big fruits and pale cream-coloured flesh had the lowest level of the trait (3.31% in 2003 and 5.47% in 2004). The highest level of dry matter content was recorded for the form 800 (15.97% in 2003 and 23.95% in 2004) of small fruits and orange flesh. Among the studied cultivars Melonowa Żółta (4.97% and 7.04% respectively) and Bambino (7.40% and 7.33%) had the lowest level of dry matter content in fruits and Ambar (11.78% and 19.10%) had the highest. The dry matter content in fruits of the analysed material differed considerably in two following years of research amounting from 3.31% to 15.97% in 2003 and from 5.47% to 23.95% in 2004. All the forms studied, except for Bambino, were characterized, on average, by a higher level of the analysed character in 2004 (the mean - 12.38%) than in 2003 (the mean - 8.94%), which was probably connected with the lower amount of rainfall in August and September 2004. Thus the weather conditions during the vegetation period, apart from the genotype, had also a significant influence on the dry matter content in fruits of winter squash.
Effect of ensiling pumpkin Cucurbita maxima with the addition of inoculant or without it on chemical composition and quality of silages. The aim of the studies was to determine the effect of ensiling the pumpkin on chemical composition and quality of silages. The silages were produced from pumpkin of Justynka variety. Before ensiling, the disintegrated pumpkin fruits were mixed with the dried beet pulp in ratio equals 80 : 20. Two variants of silages were prepared: with the inoculant and without it. In the silages, the following basic chemical composition was determined: the content of dry matter, crude ash, crude protein, crude fat, crude fibre, NDF, ADF and ADL. The indicators, being an evidence of the run of ensiling process and the quality of the obtained silages, were also determined, i.e. pH, lactic, acetic and butyric acids, ammonia nitrogen, ethanol and aerobic stability. In the obtained silages, as compared to the material before ensiling, the lower content of crude fibre and ADF was found whereas in the silage with inoculant, NDF level was also lowered. The silages with the inoculant were characterized by higher content of lactic and acetic acids and lower level of nitrogen, ammonia and ethanol. The silages with the inoculant had also higher aerobic stability. The conducted studies indicate that the application of inoculant has affected the improvement of the quality of the obtained silages.
A number of factors at all stages of data processing which affect the accuracy of determination of 15N relaxation parameters in 15N-labeled proteins is discussed. Methods which allow to improve accuracy of the determined parameters are presented using data obtained for Cucurbita maxima trypsin inhibitor.
During the years 1998–2000 the field experiments on microirrigation of squash on the very light soil were carried out in Kruszyn Krajeński near Bydgoszcz. The objective of this study was to recognize the effects of microirrigation in cultivation of winter squash in a very light soil conditions. Both systems of irrigation used, significantly increased mean marketable yields of squash as compared to non-irrigated plots. They amounted 59.4 and 55.4 t·ha⁻¹ for drip and microsprinkler irrigation, respectively. Among three cultivars tested the highest yields were obtained for ‘Melonowa Żółta’, lower for ‘Bambino’ and the lowest for ‘Ambar’. The calculated water use efficiency (WUE) index for both systems of irrigation was higher for drip irrigation.
Osmotic dehydration of pumpkin could be a useful technique to obtain new pro­cessed products of interest to the consumer. The aim of this work was to analyze the effect of concentration of starch syrup solutions, and temperature, on osmotic dehydration of pumpkin cubes. The process was carried out in a water bath for 60, 180 and 300 min. The most significant changes of water content, water loss and solid gain took place during osmotic dehydration in 66.3% starch syrup at a temperature of 60 oC. Water activity of osmotically dehydrated pumpkin decreased at higher starch syrup concentrations, and at higher temperatures.
The study was conducted on experimental plots in the conditions of Lublin. In the years 1998–2000 flowering, nectar secretion and insect visitation of male and female flowers of two winter squash (Cucurbita maxima Duch.) cultivars: ‘Ambar’ and ‘Amazonka’, were studied. The plants flowered from July to October. The flower life span was within the range of 7–10 hours. Female flowers of cv. Ambar were marked by the most abundant nectar secretion (129 mg). The nectar sugar content can be estimated as average (25%–35%). Winter squash nectar contained 84% of sucrose as well as 8–9% of fructose and 7%–8% of glucose. Flowers of the studied taxa were frequently foraged by the honey bee (66%–98% of total insects) and bumblebees (1%–30%).
Celem pracy było określenie zawartości azotanów (III) i (V) w owocach dyni olbrzymiej oraz zbadanie zmian zawartości tych związków, zachodzących podczas przechowywania. Materiał doświadczalny stanowiły trzy nowe mieszańce dyni olbrzymiej (956, 957 i 958) oraz dwie zarejestrowane odmiany: Bambino i Karowita. Zbiór owoców przeprowadzono w dniu 21 września 2005 Badania przeprowadzono w czterech terminach: I - bezpośrednio po zbiorze, II, III, IV, odpowiednio - 4, 8 i 12 tygodni po zbiorze owoców. Dynie przechowywano początkowo w tunelu foliowym, a następnie w chłodni. Temperatura przechowywania wynosiła ok. 10°C, a wilgotność powietrza 75%. Zawartość azotanów(V) w poszczególnych odmianach dyni olbrzymiej była bardzo zróżnicowana. Po zbiorze najmniejszą ilość tych związków zawierał mieszaniec 956 (20,7 mg/kg ś.m.). Najwięcej azotanów(V), ponad 10-krotnie więcej niż mieszaniec 956, zawierały owoce tradycyjnej odmiany Bambino (282,7 mg/kg ś.m.). Podczas przechowywania nastąpiło istotne zmniejszenie zawartości azotanów(V). Po 12 tygodniach składowania ubytek tego związku wyniósł nawet 62,2% początkowej zawartości. Zawartość azotanów(III) w badanych odmianach dyni olbrzymiej była bardzo niska. Po zbiorze najmniej tych związków zawierały owoce odmiany Karowita 0,02 mg/kg ś.m., więcej - 0,05 mg/kg ś.m. Bambino i 958, a najwięcej 0,07-0,08 mg/kg ś.m. odmiana oznaczona jako 956 i 957. Zawartość azotanów(III) w czasie przechowywania nie zmieniała się w sposób statystycznie istotny.
Celem pracy było określenie zmian zawartości sacharydów podczas przechowywania owoców dyni olbrzymiej (Cucurbita maxima). Materiał doświadczalny stanowiło 10 nowych mieszańców i 3 zarejestrowane odmiany dyni olbrzymiej. W badanych dyniach oznaczano zawartość: suchej substancji, ekstraktu, cukrów ogółem oraz cukrów bezpośrednio redukujących. Z różnicy zawartości cukrów obliczano ilość sacharozy. Badania przeprowadzono w 4 terminach. Poziom zawartości suchej substancji w dyniach w czasie przechowywania zawierał się w zakresie od 6,1% do 16,6%. Zawartość ekstraktu w badanych dyniach wahała się od 5,4 do 12,8%. Najwyższą wartość tego parametru stwierdzono w owocach po ok. 10 tyg. przechowywania (II termin). Owoce dyni olbrzymiej charakteryzowały się zawartością cukrów ogółem w przedziale od 27,28 do 56,61 g/100 g s.s.. Tak jak w przypadku ekstraktu, najwyższe wartości zanotowano w II terminie badań (7 spośród 13 odmian i mieszańców). Zawartość cukrów bezpośrednio redukujących wynosiła od 9,84 do 46,23 g/100 g s.s. Ich zawartość osiągnęła największy poziom również w II terminie badań (7 spośród 13 odmian i mieszańców). Zawartość sacharozy wynosiła od 0,28 do 30,89 g/100 g s.s.
Effect of dried pumpkin (Cucurbita maxima D.) supplementation on growth performance, serum biochemistry and parameters antioxidant status of rats. The aim of the studies was to determine the effect of dried pumpkin, used in the diets for rats on parameters of growth, nutrient metabolism and antioxidant status of the animals. The experiment was carried out for 7 weeks with 30 growing male Wistar rats. The animals were classified into three groups, 10 individuals in each group, with the initial body weight of 108 g. The control group (G-0) was fed the semi-synthetic mixture without dried pumpkin additive whereas the experimental groups received the mixture with 5-% (G-5) and 10-% (G-10) additive of the dried pumpkin, Ambar variety. The dry substance was obtained from disintegrated fruits, deprived of seed nests, dried at temperature of 60°C. During the experiment weight gains and feed intake were controlled. After termination of the experiment, the rats were killed by anaesthesia; the blood samples were collected and biochemical indices and indicators of antioxidant status were determined. The dietary treatments had no effects on animal growth and feed utilization. In the animals receiving dried pumpkin in their diets (G-5, G-10) significantly lower level of glucose concentration in serum was found. In group G-0, the higher concentration of triacylglycerolsin relation to group G-10 was recorded. Also, the concentration of total cholesterol in group G-0 was higher in comparison to groups G-5 and G-10. In group G-0, VLDL concentration was also higher in relation to group G-10. In group G-10 vs. groups G-5 and G-0, the higher activity of glutathione peroxidise (GPx) was recorded. Total antioxidant status (TAS) was higher in group G-10 in comparison to groups G-0 and G-5. The effect of the administered diet on indicators of the degree of lipid oxidation was also found. In group G-10 vs. group G-0, thiobarbituric acid reactive substances (TBARS) concentration was lower.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 3 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.