Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 11

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  X-ray fluorescence
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The objective of the present investigation was to study the chemical composition of stem of Pongamia pinnata is a species of tree native to India growing in semi-arid region of Kachchh district, Gujarat, India. The stem of Pongamia pinnata were subjected to Energy Dispersive X-ray Fluorescence (EDXRF) and were analyzed for different mineral composition. As the X-ray Fluorescence is one of the most reliable and accurate, as well as it is also a consistent and nondestructive method for analysis of major and trace elements using a single pressed pellet. During the study it was found that Potassium, Chloride, Calcium, Silicon, Sulfur, Aluminum, Phosphorus were noted in higher amounts, compared to that of other elements like Manganese, Iron, Nickel, Copper, Zink, Bromide, Rubidium, Strontium, Stannous, whereas the elements which were not detected in stem of Pongamia pinnata are Titanium, Cobalt, Hafnium and Tantalum.
10 representative samples of limestone were collected from the Arimogija- Okeluse Axis of the Dahomey Basin and subjected to X-Ray Fluorescence analysis. Major and Trace elements were used to classify and predict the depositional environment of Arimogija-Okeluse limestone. The results for the major oxide composition revealed that CaO content ranges from 47.6-52.31% with a mean value of 50.06%. SiO2 concentration varies from 1.94-5.24% with an average of 3.36%. Fe2O3. MgO, and Al2O3 contents have mean values of 1.702%, 1.52%, and 1.09% respectively. Other oxides; Na2O, P2O5, K2O and TiO2 are low in concentration. The Loss on Ignition also varies from 38.9-41.8 with a mean value of 40.43% suggesting a high carbonate content for the limestone. Standard Ca/Mg and Mg/Ca ratios varies from 25.87-37.63 and 0.03-0.04 with a mean of 33.31and 0.031 respectively. The high strontium content reveals a saline environmental condition of formation for the limestone. The results obtained showed that the Arimogija-Okeluse limestone is a Magnesian limestone deposited in a shallow marine environment and suitable for cement production.
6
84%
To determine the atmospheric concentrations and size distributions of particulate selenium (Se), aerosols were collected by air filtration and impactor sampling at the Kap Arkona coastal weather station on the Island of R¨ugen.T otal reflection X-ray fluorescence analysis was used to determine Se and numerous other elements as well.The dependence of the Se concentration on the wind direction and the results of a regression analysis indicated that Se associated with sub-micron particles is mainly derived from anthropogenic sources.The pronounced relationship between Se and Cu indicated that copper smelting is a major source of atmospheric selenium. A marine Se contribution was identified for particles larger than 2 μm.
The objective of the present investigation was to study the chemical composition of leaves of Carica papaya belonging to family Caricaceae growing in semi-arid region of Kachchh district, Gujarat, India. The leaves of C. papaya were subjected to Energy Dispersive X-ray Fluorescence (EDXRF) and were analyzed for different mineral composition. As the X-ray Fluorescence is one of the most reliable and accurate, as well as it is also a consistent and non-destructive method for analysis of major and trace elements using a single pressed pellet. During the study it was found that Oxygen, Calcium, Magnessium, Potassium were noted in higher amounts, compared to that of other elements like Silicon, Sulphur, Phosphorus, Chloride, Strontium, Stanous, Aluminium, Cromium and Mangenese, whereas the elements which were not detected in leaves of C. papaya are Vanadium, Titanium, Cobalt and Tantalum.
The aim of this study was determine the current levels of major and a trace element in vegetables was grown in Baghdad city, two region check in this study (Al-Taji, north of Baghdad and Al-Rashid south of Baghdad).Qualitative X-ray fluorescence analysis was used as technique for analysis of samples. Six different samples of plant are selected to study, which was tubers, leafy and fruiting .Samples checking was Lettuce, Bean, Apples, Potato, Cabbage and pear. Elements analysis as major elements were (Ca, K and Mn) and trace elements were (Fe, Cu, Pb, Sr and Zn). Results showed that concentrations of elements are in relative agree with the concentrations in neighbor countries and the standards of IAEU.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 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.