Author
Karna Wijaya
Bio: Karna Wijaya is an academic researcher from Gadjah Mada University. The author has contributed to research in topics: Catalysis & Montmorillonite. The author has an hindex of 12, co-authored 161 publications receiving 734 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors used a coconut shell biochar (CSB) catalyst to convert free fatty acids (FFA) into biodiesel, and the optimal conditions were an methanol/PFAD molar ratio of 12:1, the amount of catalyst of 7%wt and reaction temperature of 60oC.
62 citations
TL;DR: The iron(II) complexes studied have higher affinity towards the more facile A-T sequence than the G-C sequence, which may be attributed to the steric effect induced by the ancillary part of the ligands in the course of DNA binding.
48 citations
TL;DR: In this paper, aluminum pillared montmorillonite was used as a porous support for the synthesis of TiO2-based photocatalysts with varying TiO 2 loading and the titania content in the composites significantly influenced the physicochemical properties and catalytic activity.
43 citations
TL;DR: In this article, the authors focused on the preparation of Pt-promoted sulfated zirconia (Pt/SZ) and study the effect of different concentrations of Pt on SZ for hydrocracking reaction of LDPE plastic waste.
41 citations
TL;DR: It is a surprising observation that the enantioselectivity of the DNA binding for [Fe(phen)2(dppz)]2+ is base-dependent in nature.
33 citations
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TL;DR: An overview of Mercury 4.0, an analysis, design and prediction platform that acts as a hub for the entire Cambridge Structural Database software suite, is presented.
Abstract: The program Mercury, developed at the Cambridge Crystallographic Data Centre, was originally designed primarily as a crystal structure visualization tool. Over the years the fields and scientific communities of chemical crystallography and crystal engineering have developed to require more advanced structural analysis software. Mercury has evolved alongside these scientific communities and is now a powerful analysis, design and prediction platform which goes a lot further than simple structure visualization.
2,075 citations
TL;DR: In this article, a review of existing research papers on various biological, chemical and physical dye removal methods to find its efficiency through percentage of dye removal is presented, which highlights enzyme degradation and adsorption (physical) dye removal as these are known as one of the most efficient dye removal techniques these days.
Abstract: Dye effluents released from numerous dye-utilizing industries are harmful towards the environment and living things. Consequently, existence of dye effluent in environmental water bodies is becoming a growing concern to environmentalists and civilians. A long term sustainable and efficient dye effluent treatment method should be established to eliminate this issue. Dye wastewater should be treated first before release to minimize its negative impacts towards the environment and living things. However, due to lack of information on efficient dye removal methods, it is difficult to decide on a single technique that resolves the prevailing dye effluent issue. Therefore, this paper reviews existing research papers on various biological, chemical and physical dye removal methods to find its efficiency through percentage of dye removal. Although there are numerous existing tried and tested methods to accomplish dye removal, most of them have a common disadvantage which is the generation of secondary pollution to the environment. This paper highlights enzyme degradation (biological) and adsorption (physical) dye removal as these are known as one of the most efficient dye removal techniques these days. This paper also suggests the usage of a combined adsorbent as it is envisioned that this technique has better efficiency and is able to remove dyes at a faster rate.
1,186 citations
TL;DR: In this paper, the authors present an overview of the relationship between organic chemistry and natural products, focusing on the Stereochemistry and the Chemistry of Natural Products (SCHP).
Abstract: Organic Chemistry By Dr. I. L. Finar. Vol. 2: Stereochemistry and the Chemistry of Natural Products. Pp. xi + 733. (London and New York: Longmans, Green and Co., Ltd., 1956.) 40s. net.
1,037 citations
TL;DR: In this article, the authors reviewed the researches done on economics of biodiesel production, emphasizing on the methods of assessment and determination of total investment cost and operation cost, as well as on assessment of economically better technology, catalyst and feedstock alternatives.
335 citations
TL;DR: Spectroscopic studies of the interaction of these tetranuclear clusters with DNA showed that these compounds bind to dsDNA, and all three complexes, at low cluster concentration, are obviously capable of binding to pDNA causing its cleavage (relaxation) at physiological pH and temperature.
220 citations