Results 21 to 30 of about 2,511,664 (300)

Toward an overall analytical framework for the integrated sustainability assessment of the production and supply of raw materials and primary energy carriers [PDF]

open access: yes, 2015
The sustainable production and supply of raw materials (nonenergy raw materials) and primary energy carriers (energy raw materials) is a core element of many policies. The natural resource base for their production and supply, and the access thereto, are
Blengini, Gian Andrea   +5 more
core   +2 more sources

Fuel potential and properties of grape pomace hydrochar [PDF]

open access: yesActa Periodica Technologica, 2019
Increasing fossil fuel depletion that leads to air pollution and global warming have become serious environmental problem. For this reason, a numerous of alternative biofuels have been developed and investigated as potential energy sources to ...
Petrović Jelena T.   +6 more
doaj   +1 more source

Hydrophobization of limestone from the deposit 'Cancar' Aranđelovac using stearic acid [PDF]

open access: yesTehnika, 2015
The paper presents the results of investigation of the possibility of hydrophobization of calcite from deposit 'Cancar' company 'Good stone' - Aranđelovac, Serbia.
Mihajlović Slavica R.   +4 more
doaj   +1 more source

Nanoplastics in aquatic environments: Origin, separation and characterization: Review [PDF]

open access: yesTehnika, 2023
Scientists discovered plastic in the early 1900s, but didn't realize the detrimental effects its fragmentation could have on the environment 100 years later.
Milojkov Dušan V.   +4 more
doaj  

Dissolution behaviour of a polyphosphate glass in simulated body fluid [PDF]

open access: yesJournal of the Serbian Chemical Society, 2017
In this work, the dissolution behavior of a polyphosphate glass, with the composition 45P2O5·3SiO2·25K2O·15CaO·10MgO·ZnO·MnO (mol %), in simulated body fluid (SBF) at a temperature of 37 °C for different times was studied.
Nikolić Jelena D.   +6 more
doaj   +1 more source

Effects of structural and textural grain characteristics on leaching of sulphide minerals from a polymetallic concentrate by sodium nitrate and sulphuric acid solution [PDF]

open access: yesHemijska Industrija, 2017
In this paper, the influence of structural and textural characteristics of sulfide minerals on their leaching from a polymetallic concentrate by sulfuric acid and sodium nitrate solution is presented.
Sokić Miroslav D.   +6 more
doaj   +1 more source

EU methodology for critical raw materials assessment : policy needs and proposed solutions for incremental improvements [PDF]

open access: yes, 2017
Raw materials form the basis of Europe's economy to ensure jobs and competitiveness, and they are essential for maintaining and improving quality of life.
Blagoeva, Darina   +14 more
core   +2 more sources

Potential bioethanol and biogas production using lignocellulosic biomass from winter rye, oilseed rape and faba bean [PDF]

open access: yes, 2007
To meet the increasing need for bioenergy several raw materials have to be considered for the production of e.g. bioethanol and biogas.In this study, three lignocellulosic raw materials were studied, i.e.
Hauggaard-Nielsen, Henrik   +3 more
core   +1 more source

Dynamic Product Assembly and Inventory Control for Maximum Profit [PDF]

open access: yes, 2010
We consider a manufacturing plant that purchases raw materials for product assembly and then sells the final products to customers. There are M types of raw materials and K types of products, and each product uses a certain subset of raw materials for ...
Huang, Longbo, Neely, Michael J.
core   +2 more sources

Impact of recrystallization on the purity of ANSH crystals produced from Ni hyperaccumulator plant [PDF]

open access: yesTehnika
The industrial development will influence the demand and price of nickel in the coming years which opens the possibility for the use of innovative ways for its exploitation from secondary resources.
Marković Branislav R.   +6 more
doaj   +1 more source

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