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Papers by joshua evan
We construct an infinite family of hyperbolic, homologically thin knots that are not quasi-altern... more We construct an infinite family of hyperbolic, homologically thin knots that are not quasi-alternating. To establish the latter, we argue that the branched double-cover of each knot in the family does not bound a negative definite 4-manifold with trivial first homology and bounded second betti number. This fact depends in turn on information from the correction terms in Heegaard Floer homology, which we establish by way of a relationship to, and calculation of, the Turaev torsion.
Jurnal Teknologi dan Industri Pangan, 2020
Milk bioactive peptides are derivative of milk protein produced either through enzymatic activity... more Milk bioactive peptides are derivative of milk protein produced either through enzymatic activity, digestive processes, or fermentation, that give functional properties. The study aimed to obtain bioactive peptides fraction derived from goat’s milk casein through hydrolysis by papain, analyze the profiles of protein and peptides, and also test the antioxidative activity. The casein isolate was hydrolyzed by papain in a ratio of 100: 0.5 (v/v) at pH 7.0 and 50ºC. Analysis of protein concentration was carried out by the Bradford method and protein profile by SDS-PAGE. Antioxidant assay was carried out by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. A 1,000 ppm ascorbic acid solution was used as positive control. Peptide fractionation was done by membrane filtration with a cut off of 10 kD and 30 kDa. The protein concentration of casein hydrolysates decreased significantly after hydrolysis process with papain. The electrophoresis results showed six protein bands in casein with mole...
We construct an infinite family of hyperbolic, homologically thin knots that are not quasi-altern... more We construct an infinite family of hyperbolic, homologically thin knots that are not quasi-alternating. To establish the latter, we argue that the branched double-cover of each knot in the family does not bound a negative definite 4-manifold with trivial first homology and bounded second betti number. This fact depends in turn on information from the correction terms in Heegaard Floer homology, which we establish by way of a relationship to, and calculation of, the Turaev torsion.
Jurnal Teknologi dan Industri Pangan, 2020
Milk bioactive peptides are derivative of milk protein produced either through enzymatic activity... more Milk bioactive peptides are derivative of milk protein produced either through enzymatic activity, digestive processes, or fermentation, that give functional properties. The study aimed to obtain bioactive peptides fraction derived from goat’s milk casein through hydrolysis by papain, analyze the profiles of protein and peptides, and also test the antioxidative activity. The casein isolate was hydrolyzed by papain in a ratio of 100: 0.5 (v/v) at pH 7.0 and 50ºC. Analysis of protein concentration was carried out by the Bradford method and protein profile by SDS-PAGE. Antioxidant assay was carried out by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. A 1,000 ppm ascorbic acid solution was used as positive control. Peptide fractionation was done by membrane filtration with a cut off of 10 kD and 30 kDa. The protein concentration of casein hydrolysates decreased significantly after hydrolysis process with papain. The electrophoresis results showed six protein bands in casein with mole...