Results 21 to 30 of about 523,498 (290)

Optimization of the reaction parameters of heavy naphtha reforming process using Pt-Re/Al2O3 catalyst system

open access: yesEgyptian Journal of Petroleum, 2017
One of the most significant procedures in oil refineries is naphtha catalytic reforming unit in which high octane gasoline is gained. Normally, in oil refineries, flow instability in the composition of feedstock can affect the product quality. The aim of
Hussien A. Elsayed   +4 more
doaj   +1 more source

Testing refinements by refining tests [PDF]

open access: yes, 1998
One of the potential benefits of formal methods is that they offer the possibility of reducing the costs of testing. A specification acts as both the benchmark against which any implementation is tested, and also as the means by which tests are generated.
Derrick, John, Boiten, Eerke Albert
openaire   +1 more source

Effect of Refining and Fractionation Processes on Minor Components, Fatty Acids, Antioxidant and Antimicrobial Activities of Shea Butter

open access: yesFoods, 2023
Shea butter is becoming increasingly popular in foods, cosmetics and pharmaceutical products. This work aims to study the effect of the refining process on the quality and stability of fractionated and mixed shea butters.
Adel G. Abdel-Razek   +9 more
doaj   +1 more source

Fit-for-Use Nanofibrillated Cellulose from Recovered Paper

open access: yesNanomaterials, 2023
The cost-effective implementation of nanofibrillated cellulose (CNF) at industrial scale requires optimizing the quality of the nanofibers according to their final application. Therefore, a portfolio of CNFs with different qualities is necessary, as well
Ana Balea   +7 more
doaj   +1 more source

Data refinement refined resume [PDF]

open access: yes, 1986
We consider the original work of Hoare and Jones on data refinement in the light of Dijkstra and Smyth's treatment of nondeterminism and of Milner and Park's definition of the simulation of Communicating Systems. Two proof methods are suggested which we hope are simpler and more general than those in current use.
J. He, C. A. R. Hoare, J. W. Sanders
openaire   +1 more source

A Technology for Reduction of Phenol Containing Waste Water and Power Consumption in Phenol and Acetone Plants

open access: yesEurasian Chemico-Technological Journal, 2001
The aim of this paper is to present a new concept for separation of a reaction mixture (RM) that is result of degradation of cumenehydroperoxide in industrial plants.
N. T. Popov   +2 more
doaj   +1 more source

Refining Action Segmentation with Hierarchical Video Representations

open access: yesIEEE International Conference on Computer Vision, 2021
In this paper, we propose Hierarchical Action Segmentation Refiner (HASR), which can refine temporal action segmentation results from various models by understanding the overall context of a given video in a hierarchical way.
Hyemin Ahn, Dongheui Lee
semanticscholar   +1 more source

Catalytic

open access: yesEgyptian Journal of Petroleum, 2014
A series of dealuminated Y-zeolites impregnated by 0.5 wt% Pt catalysts promoted by different amounts of Ni, Pd or Cr (0.3 and 0.6 wt%) were prepared and characterized as hydrocracking catalysts. The physicochemical and structural characterization of the
S.A. Hanafi   +4 more
doaj   +1 more source

Oxidative Stability of Virgin and Refined Argan [Argania spinosa L. (Skeels)] Oil under Accelerated Aging Conditions and Shelf-Life Prediction at Room Temperature: A Comparative Study

open access: yesAnalytica, 2023
Argan kernels, fruits regurgitated by goats, are 30% cheaper than the regular kernels used to prepare food argan oil. The use of such argan kernels as a cosmetic ingredient, after refining, is thus economically attractive.
Rabha Aissa   +9 more
doaj   +1 more source

Effects of Solvent Concentration on Refining (Degumming, Dewaxing, and Deacidification) of Canola Oil Using Membrane Filtration [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2023
Miscellas of canola were obtained by mixing its crude oil with hexane solvent at 80:20 and 70:30 ratios. Then, 16.1 M of phosphoric acid and 6.92 M of sodium hydroxide were mixed with the resulting micelles at 0.3% (w/w for degumming) and 13% (w/w for ...
Maryam Rashidian   +4 more
doaj   +1 more source

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