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Wyszukujesz frazę "boron mineral" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Characterization of espey colemanite and variation of its physical properties with temperature
Autorzy:
Celik, A. G.
Cakal, G. O.
Powiązania:
https://bibliotekanauki.pl/articles/109932.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
colemanite
boron mineral
characteristic property
physical property
temperature
Opis:
It is important to characterize boron containing minerals because of their uses in a wide range of applications. The purpose of this study is to characterize Espey colemanite by minerological, petrographical and thermal means and to investigate the variation of its physical properties with temperature (up to 600 °C). Colemanite, having a non-porous crystalline structure, was found to consist of 35.8% B2O3 and 30.5% SiO2. The thermal decomposition of colemanite occurred within the temperature range of 300–600 °C. It was found that calcination, a thermal treatment method, influenced the physical properties of colemanite. The highest surface area, 131.9 m2/g, was obtained at 500 °C. The physical properties were found to have high statistical relation.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 1; 66-76
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of boron in animal health
Autorzy:
Kabu, M.
Uyarlar, C.
Zarczynska, K.
Milewska, W.
Sobiech, P.
Powiązania:
https://bibliotekanauki.pl/articles/961611.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
boron
enzyme
hormone
mineral
animal health
Opis:
Boron is a mineral used for various purposes in glass, ceramics, automotive and paint industries. Recently, boron has been confirmed to be an essential element for plants, animals and humans, although the knowledge of its biological effects is rather scanty. Boron is a dynamic trace element, and inorganic borates are transformed into boric acids and absorbed from mucosal surfaces, even when they are in low levels of physiological pH. It has been determined that boron affects many enzymes, bone development, mineralization, Ca, P, Mg and energy metabolism. Boron mineral compounds can be effective in optimizing the performance of an organism, treatment of bone structure disorders, reduction of cholesterol and triglyceride levels. Beside the effects it produces specifically on fat and lipid metabolisms, boron can influence the activity of vitamin D and affect some disorders connected with its deficiency. Although several studies on effects of boron on some mechanisms have been conducted over the last ten years, the available information remains insufficient.
Źródło:
Journal of Elementology; 2015, 20, 2
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of liming and mineral fertilization on the yield and boron content of potato tubers (Solanum tuberosum L.) and green mass of fodder sunflower (Helianthus annuus L.) cultivated in loess soil
Autorzy:
Hajduk, E.
Gąsior, J.
Właśniewski, S.
Nazarkiewicz, M.
Kaniuczak, J.
Powiązania:
https://bibliotekanauki.pl/articles/1190154.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
crop yield
boron
liming
mineral fertilization NPK
potato
fodder sunflower
Opis:
The paper presents results of studies on the influence of liming and mineral fertilization on the yields and boron content of potato tubers and green matter of fodder sunflower grown in four and three rotations, respectively, on soil developed from loess. The experiment was set up on a field submitted to long-term fertilization and located in the village Krasne near Rzeszow, lying in the Rzeszów Foothills (Poland). Boron was determined colorimetrically with diantrimide after digestion of dried plant material at 550°C and dissolution of the residue in hydrochloric acid solution. Average yields of potato tubers and green matter of fodder sunflower were higher after liming, but statistical significance was confirmed only for fodder sunflower. Mineral NPK fertilization, regardless of liming, significantly enhanced the yield of green matter of fodder sunflower and, in most fertilization treatments, raised potato tuber yields. Potato tubers accumulated much smaller amounts of boron (2.2-7.5 mg kg-1 DM) than aerial parts of fodder sunflower (20- 60 mg kg-1 DM). The boron content was significantly lower in potato tubers from the limed variant than in plants from the non-limed field. The response of sunflower to soil liming was opposite. The mineral fertilization applied, regardless of liming, had no significant effect on the boron content of potato tubers. Mineral nutrition reduced the boron content in the sunflower biomass under the influence of increasing doses of nitrogen and against the background of constant phosphorus-potassium fertilization.
Źródło:
Journal of Elementology; 2017, 22, 2; 411-426
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Varied Content of Molybdenum and Boron in Soil on Urease Activity
Wpływ zróżnicowanej ilości molibdenu w glebie na aktywność ureazy
Autorzy:
Kalembasa, S.
Kuziemska, B.
Powiązania:
https://bibliotekanauki.pl/articles/953636.pdf
Data publikacji:
2013
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
enzymatic activity
urease
molybdenum
boron
mineral fertilization
aktywność enzymatyczna
ureaza
molibden
bor
nawożenie mineralne
Opis:
The aim of the study was to determine the effect of varied content of molybdenum and boron in soil on urease activity. Soil in a three-year pot experiment, to which different amounts of molybdenum (0, 0.05, 0.1 and 0.15 mgMo kg–1 of soil on a one-off basis as an aqueous solution of Na2MoO4 2 H2O) and boron (5, 10, 15 mgB kg–1 of soil as an aqueous solution of borax Na2B4O7 10 H2O) were used for analyses. Orchard grass and crimson clover were cultivated in the experiment. Four re-growths of the test plants were harvested during each vegetation period. Soil during each year of the experiment was analysed, after each re-growth of the test plants. Urease activity was determined by the Hoffman and Teicher method based on colorimetric determination of ammonia following enzymatic hydrolysis of urea. The application of increased amounts of molybdenum significantly increased the enzyme activity in soil samples taken after the grass and clover were harvested. Urease activity in soil samples taken after clover harvest was higher each year than in soil taken after grass harvest. No effect of increasing boron content on urease activity was observed in soil taken after the cultivation of test plants.
Źródło:
Ecological Chemistry and Engineering. A; 2013, 20, 6; 611-620
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth, evapotranspiration and mineral content of gerbera under combined salinity and excess boron
Autorzy:
Gomez Bellot, M.J.
Carmassi, G.
Bartalucci, M.
Sanchez-Blanco, M.J.
Pardossi, A.
Powiązania:
https://bibliotekanauki.pl/articles/1959.pdf
Data publikacji:
2018
Wydawca:
Instytut Ogrodnictwa
Tematy:
gerbera
ornamental plant
cut flower
evapotranspiration
mineral content
salinity
boron
toxicity
sodium chloride
growth
flowering
nutrient uptake
Źródło:
Journal of Horticultural Research; 2018, 26, 2
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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