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Assessment of physico-chemical properties of gum-arabic of commerce from Acacia senegal found in different localities of Ethiopia

100%
Yebeyen D., Haile F.
World News of Natural Sciences
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2017
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vol. 12
33-42
EN
A study was conducted to investigate the effect of growing location in the physico-chemical properties of gum arabic obtained from Acacia senegal. Authentic representative gum exudates samples were collected from Abederafi, Yabello, Awash and Filtu areas of Ethiopia. The experiment was conducted to determine Moisture content (MC), Ash content (Ash), pH, Relative Viscosity (RV), Nitrogen (N), Crude Protein (CP) and Mineral contents. Laboratory analyses were employed to determine the physico-chemical characteristics. The results were analyzed by using SAS Statistical Software. The analysis indicated that very high significant differences (p < 0.001) were seen on Ash, pH, RV, iron, calcium, and sodium contents of the gum arabic samples between the study sites. Furthermore, significant differences (p < 0.05) were indicated for N, CP, Cu, K contents. The results also showed MC, Mn and Mg contents have no significant difference among growing locations. According to our results, the percentage moisture content of the gum arabic samples were between 12.64 % and 13.41 %, while Ash percentage were between 0.32 % and 16.98 %. The mean pH values of the gum samples, obtained by employing different concentration of aqueous solutions also ranged between 4.4 and 4.97. In addition, the relative viscosity of the gum samples studied fall between 0.9 to 4.2 centipose, while Nitrogen and crude protein contents of the gum arabic samples from the study areas were from 0.313 % to 0.513 % and 1.943 % to 3.21 %, respectively. The major mineral element compositions of the gum arabic samples in descending order were Mg, Ca, Na, Cu, Fe, Mn and K. As compared to international standards and prior studies on gum arabic, the gum-arabic samples from the study sites have comparable physico-chemical characteristics.
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Evaluation of the hydrological role of wetlands in the Włodawka River catchment (Polesie Lubelskie)

88%
Turczyński M., Michalczyk Z., Chmiel S., Mięsiak-Wójcik K., Głowacki S., Turczyński M., Michalczyk Z., Chmiel S., Mięsiak-Wójcik K., Głowacki S.
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issue 13B
3
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Warunki środowiskowe i paleogeograficzne znaczenie osadów torfowiska Błonie (środkowa Polska)

63%
Janas W., Forysiak J.
Acta Universitatis Lodziensis. Folia Geographica Physica
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2023
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issue 22
7-17
EN
The area of the studied peatland is a fragment of a complex of wetlands occupying the floor of the Warsaw-Berlin ice-marginal valley in the region of Łęczyca. The specificity of this part of the valley and the peatland in Błonie is influenced by the watershed location and the Kłodawa rock salt dome of the Permian age. The thickness and lithology of biogenic deposits were identified, and the physicochemical parameters of the sediments and their dating were determined in the selected research profile. This made it possible to reconstruct the most important phases of wetland development, reflecting the natural and anthropogenic changes in the conditions of the geographical environment that prevailed in the area of the Warsaw-Berlin ice-marginal valley in the section between Łęczyca and Błonie
PL
Obszar badanego torfowiska stanowi fragment kompleksu mokradeł zajmujących dno pradoliny warszawsko-berlińskiej w rejonie Łęczycy. Na specyfikę tej części pradoliny oraz torfowiska w Błoniu wpływa wododziałowe położenie, a także kłodawski wysad soli kamiennej wieku permskiego. Rozpoznane zostały miąższość i litologia utworów biogenicznych, a w wybranym profilu badawczym oznaczono ich parametry fizykochemiczne i wykonano datowania. Pozwoliło to na zrekonstruowanie najważniejszych faz rozwoju mokradła, odzwierciedlających naturalne i antropogeniczne zmiany warunków środowiska geograficznego, jakie panowały na obszarze pradoliny warszawsko-berlińskiej w odcinku między miejscowościami Łęczyca i Błonie.
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