Results 71 to 80 of about 7,842 (218)
The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)
Sedimentology, Volume 73, Issue 3, Page 802-837, April 2026.ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti +5 more
wiley +1 more source
Evaluation of Ophiolite Complex Impact and Pollution Indices of Groundwater Resources in Jovein Area (NE Iran) [PDF]
Journal of Advances in Environmental Health ResearchBackground: Potential ore deposits and mining activities can cause soil and groundwater pollution with heavy metals, posing risks to human health. This study aimed to identify heavy metal sources, their transfer patterns, and contamination levels in the ...
Raheleh Hatefi +2 more
doaj +1 more source
Artificial meteor ablation studies: Olivine [PDF]
Artificial meteor ablation was performed on a Mg-rich olivine sample using an arc-heated plasma of ionized air. Experimental conditions simulated a meteor traveling about 12 km/sec at an altitude of 70 km.
Blanchard, M. B., Cunningham, G. G.
core +1 more source
Термическое разложение кристаллогидратов нитратов меди и хрома в технологии катализаторов окисления углеводородов [PDF]
, 2009 В статті встановлені основні стадії розкладання суміші кристалогідратів нітратів міді та хрому в інтервалі температур 0 – 1000 °С. Виявлено, що розкладання солей супроводжується утворенням проміжних продуктів – гідроксісолей міді та хрому та хромату ...
Савенков, Анатолий Сергеевич +1 more
core
Hydrological Processes, Volume 40, Issue 3, March 2026.Conceptual diagram of hydrological and geochemical processes within the Santa Elena Ophiolite, Costa Rica. It highlights watershed cross‐sections, soil genesis, hyperalkaline Type II waters (pH > 11.6) with calcite crust and trapped H2/CH4 gases, seepage into surface waters, storm‐impacted stream profiles, weathered vs.
Alexandra May +8 more
wiley +1 more source
Production of fatty alcohol from palm oil methyl ester [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2007 Fatty alcohol is an important raw material for the production of surfactants, and is currently in demand by markets and has a high potential for growth. Moreover, fatty alcohol can be made from methylester that is produced from fats and natural oil.
Tongurai, C. +2 more
doaj
Green Synthesis and CatalysisLignocellulose biomass, without any doubts, is one of the most promising, and, therefore, one of the most studied sources for the production of biofuels, valuable chemicals and “green” solvents. Furfural – a product of biomass catalytic conversion – is a
Victoria S. Zhuravleva +4 more
doaj +1 more source
Extraction of platinum metals during procssing of chromium ores from dunnite deposits
Записки Горного института, 2018 Currently, the main raw materials sources of platinum group metals in Russia are complex sulfide copper-nickel ores of the Taimyr region and placer deposits.
G. V. Petrov +2 more
doaj +1 more source
Activities of Copper Chromite Catalysts for Dehydrogenation of Ethanol
The Journal of the Society of Chemical Industry, Japan, 1970 脱水素用亜クロム酸銅系触媒の活性究明の一助とするために, 純エタノールの脱水素反応に対して, 細孔内拡散の影響度を考慮した速度評価を行なった。すなわち, 工業用円柱触媒 [A,(CuO-Cr2[CuO4]系);径:0.490～0.495cm, 高さ:0.217～0.407cmとG-13,(Cr2[CuO4]系);径:0.476～0.479cm, 高さ:0.215～0.285cm]のそれぞれ, 代表寸法(ΣVpi/ΣSOi;ΣVpi:見かけ容積の和,ΣS0i:見かけ外表面積の和)の異なるものに対して, 触媒Aは 200～300℃で, 触媒 G-13 は 200～350℃ で, 常圧・等温流通系操作によって, 触媒見かけ単位容積当りおよび単位質量当りの, 外部抵抗の無視できる場合の定常速度 (ra ...
Shigeaki KASAOKA +2 more
openaire +2 more sources
Assessment of Air and Water Quality in Opencast Mines [PDF]
, 2015 Mining Industry is one of the most important and revenue-generating industries of our country. It’s pivotal for the industry to thrive and grow to ensure that the manufacturing sector also develops at the required pace.
Pal, Jiten Kumar, Pasayat, Rahul
core