Wyniki wyszukiwania - BazTech

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Analiza wybranych właściwości fizycznych i chemicznych owsa szorstkiego (Avena strigosa Schreb.)

Kolankowska Ewelina, Choszcz Dariusz J., Wojtkowiak Katarzyna M.

Przemysł Chemiczny

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2022

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T. 101, nr 1

46--49

PL

Przedstawiono wyniki badań dotyczące pomiarów cech fizycznych (długość, szerokość, grubość), zawartości białka i składników mineralnych w owsie szorstkim. Cecha fizyczna, która najbardziej charakteryzuje owies szorstki to masa i długość ziarniaków. W przypadku właściwości chemicznych ziarniaki owsa szorstkiego zawierają ok. 10% białka oraz ok. 3% popiołu. Ziarno owsa szorstkiego charakteryzuje również wysoka zawartość P, Mg, Fe, Zn i Mn.

EN

Three hundred grains of rough oats were studied for length, width, thickness as well as the contents of macro- and microelements, dry matter, ash and protein. The grain showed a high content of P, Mg, Fe, Zn and Mn and contained approx. 10% protein and approx. 3% ash.

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Study on cutting cultivation technology and rooting mechanism of Cyclocarya paliurus

Yang Wanxia, Zhuang Jiaqi, Ding Siyu, Zhang Mei, Tian Yuan, Wan Shiying, Fang Shengzuo

Ecological Chemistry and Engineering. S

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2022

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Vol. 29, nr 3

379--389

EN

Cyclocarya paliurus is an important rare and multipurpose tree species in China. In view of the difficulty of asexual propagation of Cyclocarya paliurus, this paper explores the technical system of Cyclocarya paliurus cutting propagation from the aspects of cutting collection position and time, tannin removal pretreatment, hormone treatment, sand storage treatment, cutting matrix, environmental factors and physical factors, and discusses its internal physiological changes in the process of cutting rooting. This paper attempts to clarify the physiological characteristics of Cyclocarya paliurus in the process of cutting propagation and rooting. The results of this study can provide technical support and theoretical basis for the cuttings propagation of Cyclocarya paliurus. The results show that the rooting rate of cuttings inserted on the mixture of perlite and vermiculite is up to 32.2 %. In summer, when the middle and upper parts of branches were treated with 300 mg/L rooting powder No. 1 and GGR-6 (Green Growth Regulator-6) mixture, the rooting rate was up to 44.4 %; in winter, the rooting rate of the base of branches was 36.7 % under the same treatment. During the rooting process of Cyclocarya paliurus, a large number of nutrients such as soluble sugar, starch and soluble protein were consumed. SOD (Superoxide Dismutase), POD (Peroxidase), and PPO (Polyphenol oxidase) are closely related to cutting and rooting. High activity SOD and POD are conducive to the expansion of cuttings, and high activity SOD and PPO are conducive to improving the stress resistance of cuttings. Hormone treatment can improve the enzyme activity and make the enzyme activity change in the direction conducive to rooting. The change of endogenous hormone content in cuttings reflects the rooting ability of Cyclocarya paliurus. Substrate heating and hormone treatment can regulate the content of endogenous hormone in cuttings during the rooting process, so as to affect the rooting effect, the stable total nitrogen content in cuttings was conducive to root formation.

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Physicochemical quality of Wadi Bounamoussa surface waters (Northeast of Algeria)

Ramdani H., Laifa A.

Journal of Water and Land Development

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2017

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no. 35

185--191

EN

Nitrogen is a nutrient that causes inland waters and marine environements’ eutrophication. The latter has become a worldwide environmental concern that considerably lessens the aquatic environments’ quality. This study has focused on physicochemical aspect of Wadi Bounamoussa water, by the diagnosis of the watercourse eutrophication. The river drains a watershed mainly characterized by agricultural activities based on irrigated crops and livestock of sheep and cattle. Fertilizers being Nitrogen inputs and livestock waste are potential pollution source. Nitrogen can get into the watershed's hydro-system in the form of minerals or organic. Temperature, pH, dissolved oxygen, NH4 +, NO3 –, NO2 – were monitored in water samples taken in September and in December 2013 corresponding to the low season, and also in March and June 2014 corresponding to water high season. These samples were obtained from ten stations located along the river downstream sequence between El Cheffia dam and El Batah River mouth. Few observations have been made based on results obtained from the physicochemical analysis. Temperature, pH level, electrical conductivity as well as silica were significantly higher during low water periods comparing to high ones. It has been noticed from the analysis of various water sampling stations the presence of chloride ions with an increasing gradient from upstream to downstream, where it’s content has fluctuated between 30.52 mg·dm–3 and 9964.6 mg·dm–3. In conclusion, the presence of inorganic nitrogen is not considered as an eutrophication risk on the watercourse and its receiving environment.

PL

Azot jest pierwiastkiem biogennym, który powoduje eutrofizację wód śródlądowych i morskich. Eutrofizacja stała się przedmiotem zainteresowania w skali światowej, ponieważ znacząco pogarsza jakość środowiska wodnego. W badaniach prezentowanych w niniejszej pracy skupiono się na fizycznych i chemicznych parametrach jakości wody rzeki Bounamoussa celem zdiagnozowania eutrofizacji tego cieku. Rzeka drenuje zlewnię zdominowaną przez nawadniane uprawy roślin oraz chów owiec i bydła. Nawozy azotowe i odchody zwierzęce stanowią potencjalne źródło zanieczyszczeń. Azot dociera do systemu wodnego zarówno w postaci nieorganicznej, jak i organicznej. Monitorowano temperaturę, pH, stężenie rozpuszczonego tlenu, NH4 +, NO3 – i NO2 – w próbkach wody pobranych we wrześniu i grudniu 2013 r. (stan niskiej wody) oraz w marcu i czerwcu 2014 (stan wysokiej wody). Próbki pobrano w 10 stanowiskach usytuowanych w dół biegu rzeki od zapory El Cheffa do ujścia rzeki Batah. Uzyskane wyniki dowodzą, że temperatura, pH, przewodność elektrolityczna i zawartość krzemu miały znacząco większe wartości w okresie niskich stanów wody niż w okresie wysokich stanów wody. Zanotowano rosnący gradient stężenia chlorków z biegiem rzeki – od 30,52 mg·dm–3 w górze rzeki do 9964,6 mg·dm–3 w dolnych odcinkach rzeki. We wnioskach stwierdzono, że obecność nieorganicznych form azotu nie stwarza ryzyka eutrofizacji rzeki i jej odbiornika.