Results 21 to 30 of about 38,393 (60)

Experimental performance investigation of air heating solar collector with fins and twisted tapes [PDF]

open access: yesCarbon: Science and Technology, 2018
The current work outlines the experimental findings of an air heating solar collector integrated with fins and twisted tapes of twist ratio ‘Y=2.66’ for the range of air flow rate from 0.007 kg/s to 0.0158 kg/s.
Rajesh Kumar , Prabha Chand
doaj  

KECEPATAN TUMBUH KRISTAL ASAM SITRAT MONO HIDRAT DALAM KOLOM FLUIDASI DAN KAITANNYA DENGAN IMPURITAS KRISTAL

open access: yesReaktor, 2017
Operasi kristalisasi adalah salah satu bentuk operasi yang bertujuan untuk pemurnian dengan pengaturan kondisi oprasi yang baik selain akan didapatkan kualitas produk kristal dengan kemurnian tinggi juga dapat dioptimasikan kecepatan produksinya.
D. Soetrisnanto
doaj   +1 more source

Catalytic Activity of Calcium Oxide from Fishbone Waste in Waste Cooking Oil Transesterification Process

open access: yesJurnal Bahan Alam Terbarukan, 2017
Calcium oxide was obtained from waste fish bones that has been carried out systematically by decomposition at various temperatures that 800oC, 900oC and 1000oC for 4 hours.
Nuni Widiarti   +6 more
doaj   +1 more source

Development of Near Infrared Spectroscopy Models for Quantitative Prediction of the Content of Bioactive Compounds in Olive Leaves [PDF]

open access: yesChemical and Biochemical Engineering Quarterly, 2019
The objective of this work was to evaluate the ability of artificial neural networks (ANN) in near infrared (NIR) spectra calibration models to predict the total polyphenolic content, antioxidant activity, and extraction yield of the olive leaves aqueous
D. Valinger   +7 more
doaj   +1 more source

The Effect of H2SO4 Concentration and Micro Wave Power in Microwave Assisted Hydrolysis of Furfural Production from Empty Palm Fruit Bunches

open access: yesJurnal Bahan Alam Terbarukan, 2019
Empty fruit bunches (EFB), which are wastes from fresh palm fruit bunches, are one of organic wastes from palm oil processing industries as much as 23% of the total production.
Kusyanto Kusyanto, Suci Rahmadina
doaj   +1 more source

Antimicrobial Activity of Kaffir Lime Peel Extract against Streptococcus mutans

open access: yesReaktor, 2019
Kaffir lime peels contain polyphenols as natural antioxidant and antimicrobial agent. The aims of this study were to (1) extract phenolics compounds from kaffir lime peels using water, ethanol 70% and ethanol 96% as the solvent, and (2) assess the ...
Rosalie Purwanto   +3 more
doaj   +1 more source

Poly(3-hydroxybutyrate) Production from Natural Gas by a Methanotroph Native Bacterium in a Bubble Column Bioreactor [PDF]

open access: yesChemical and Biochemical Engineering Quarterly, 2019
Reducing the total cost of poly(3-hydroxybutyrate) (PHB) production as an attractive substitute for conventional petrochemical plastics still remains an unsolved problem.
K. Kosravi-Darani   +3 more
doaj   +1 more source

Enzymatic Kinetics of Solvent-free Esterification with Bio-imprinted Lipase [PDF]

open access: yesChemical and Biochemical Engineering Quarterly, 2020
To avoid the use of compounds that burden the environment, a solvent-free enzymatic reaction was the focus of this study. Investigated were the catalytic activities and kinetics of lipases that were pretreated with carboxylic acids for the solvent-free ...
M. Matsumoto, Y. Hasegawa
doaj   +1 more source

Synthesis and Characterization of Natural Sensitizers for Dye Sensitized Solar Cells

open access: yes, 2017
Natural dyes of anthocyanin extract from flame tree flower (Delonix regia) and chlorophyll extract from pawpaw leaf (Carica papaya) were used as sensitizer to fabricate dye sensitized solar cell (DSSC).
Agam, Mohd Arif Bin   +4 more
core   +1 more source

ADSORPTION MALACHITE GREEN ON NATURAL ZEOLITE

open access: yesReaktor, 2012
A natural zeolite was employed as adsorbent for reducing of malachite green from aqueous solution. A batch system was applied to study the adsorption of malachite green in single system on natural zeolite.
Eko Ariyanto
doaj   +1 more source

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