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    Wyświetlanie 1-4 z 4
    Tytuł:
    Potential of karamunting (Rhodomyrtus tomentosa) fraction against kidney damage in diabetic rats
    Autorzy:
    Saleh, M.I.
    Hidayat, R.
    Febriyanto, G.
    Parisa, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049334.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    Rhodomyrtus tomentosa
    antioxidant compound
    oxidative stress
    kidney damage
    diabetic rat
    hemoglobina glikowana A
    insulina
    środki ochronne
    stres oksydacyjny
    Opis:
    Introduction: Karamunting (Rhodomyrtus tomentosa) is Indonesian native plant that contains high antioxidant compounds with the potential to suppress oxidative stress activity in cells. This study is the first research to specifically explore the role of the karamunting fraction in protecting kidney damage due to the formation of AGEs in the renal glomerulus in diabetes mellitus. Objective: This study aims to assess the impact of karamunting on blood glucose profile, HbA1c, insulin profile and kidney condition (AGEs expression, TNF-α and kidney histology) in diabetic rats. Methods: The karamunting extraction process was carried out by maceration with ethanol. Induction of diabetes mellitus was carried out using streptozotocin. Thirty male rats (Rattus norvegicus), Wistar strain weighing between 200–250 grams were the subject in this study. HbA1c, insulin, TNF-α, AGEs levels were evaluated in the kidney tissue. Histological assessment of the kidney was carried out. Results: Karamunting can improve blood glucose levels in diabetic rats. This improvement in blood glucose levels causes an improvement in the level of HbA1c. Administration of karamunting fraction can prevent AGEs deposition in renal tissue, which in turn will inhibits the inflammation and prevents further damage of kidneys. Conclusion: Karamunting fraction can improve blood glucose regulation so that it can prevent further damage and complications of kidney organs in diabetic rats.
    Źródło:
    Herba Polonica; 2021, 67, 2; 9-16
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study the local scour around different shapes of single submerged groyne
    Autorzy:
    Rashak, Budoor M.
    Khassaf, Saleh I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1844415.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    bed materials
    bed topography pattern
    local scour
    single submerged groyne
    Opis:
    River training structures; such as submerged groynes are low profile linear structures that are generally located on the outside bank to form groynes fields and prevent the erosion of stream banks by keeping a flow away from it. In the present research, the maximum scour depth was measured based on laboratory experiments where different shapes of submerged groynes (I-shape, L-shape, T-shape) were used as sort of countermeasures to investigate about most shapes that reduce the scour around them. The result of submerged groynes showed a clear decrease in scour depth ratio due to increasing submerged ratio and increase the scour hole geometry with increasing of flow intensity, and also Froude number. The maximum scour hole in this research was observed at T-shape groyne and then followed by I-shape groyne and L-shape groyne. The maximum scour depth that cased by I-shape was more than L-shape by a percentage about 8.2%, and it was less than T-shape by a percentage about 16.4%.
    Źródło:
    Journal of Water and Land Development; 2020, 47; 1-9
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Computational Study of the Ozonolysis of Phenanthrene
    Autorzy:
    Almatarneh, M.
    Al-Shamaileh, E.
    Ahmad, Z.
    Abu-Saleh, A.A.
    Elayan, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031212.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    Ozonolysis of Phenanthrene
    Primary Ozonide
    Criegee Intermediate
    Opis:
    A computational study of the ozonolysis of phenanthrene has been carried out using DFT methods (B3LYP and M06-2X). The reaction mechanism for the ozonolysis was studied in both gas phase and in solution, using the polarizable continuum solvation model. The structures for all proposed reaction mechanisms were optimized using M06-2X and B3LYP methods with 6-31G(d), 6-31+G(d), and 6-31G(2df,p) basis sets. In solution, all structures were optimized using B3LYP/6-31+G(d,p) and polarizable continuum solvation model. Six different mechanistic pathways were explored for the ozonolysis of phenanthrene that forms aldehyde compounds. The activation energy of the formation of the primary ozonide intermediate in pathway A is 13 kJ mol¯¹ in the polarizable continuum model with the B3LYP/6-31+G(d,p) method. This reaction is followed by a dissociation into a zwitterionic Criegee intermediate with an activation energy of 76 kJ mol¯¹ in polarizable continuum model with B3LYP/6-31+G(d,p). Furthermore, the nucleophilic addition reactions of methanol to the Criegee intermediate have been studied along two pathways, B1 and B2. The water-mediated mechanism for pathways B2 and C2, where the water molecule acts as a mediator through a 1,5-proton shift, dropped the activation barriers by 18 and 26 kJ mol¯¹, respectively, based on B3LYP/6-31G(2df,p) method. The solvation model (polarizable continuum) reduces the energy barriers for all pathways except for the reaction of methanol with the Criegee intermediate. This study provides an insight into understanding the mechanism of transformation of this pollutant into non-toxic compounds.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1149-1156
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of Hexavalent Chromium from Aqueous Solution by the Pod of Acacia gerrardii
    Autorzy:
    Abdulaziz, Mohammed A.
    Bakri, Abdulrahman A.
    Al-Zahrani, Saleh A.
    Al-Zahrani, Majed S.
    Al-Lehebi, Abdulrahman N.
    Banjar, Fadil M.
    Nabag, Mohand I.
    Powiązania:
    https://bibliotekanauki.pl/articles/779613.pdf
    Data publikacji:
    2019
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Biosorption
    chromium
    Acacia gerrardii
    isotherm models
    Park kinetic models
    Opis:
    This study aims at investigating the potential of Acacia gerrardii pod for the removal of Cr(VI) in batch system. Effect of solution pH, biosorbent dosage, initial concentration of Cr(VI), contact time on the removal process was examined. Complete removal of hexavalent chromium was achieved at pH values 1.0 and 2.0 whereas maximum removal of total chromium was obtained at pH of 3.0. The study showed that the biosorption and bioreduction mechanisms were involved in the removal process. The time required for complete removal of Cr(VI) using the pod of Acacia gerrardii was shortened with an increase in biomaterial dosage and decrease in Cr(VI) concentration. Kinetic data was well described using Park kinetic model. Freundlich isotherm model adequately fitted the equilibrium data indication multilayer adsorption of total chromium on the surface of biomaterial. The pod of Acacia gerrardii could be used efficiently for the removal of hexavalent chromium from aqueous solutions.
    Źródło:
    Polish Journal of Chemical Technology; 2019, 21, 2; 14-19
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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