Keiko Shirai

ORCID: 0000-0001-6965-131X
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About
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Research Areas
  • Nanocomposite Films for Food Packaging
  • Protein Hydrolysis and Bioactive Peptides
  • Diabetes, Cardiovascular Risks, and Lipoproteins
  • Enzyme Production and Characterization
  • Lipid metabolism and disorders
  • Studies on Chitinases and Chitosanases
  • biodegradable polymer synthesis and properties
  • Microbial Metabolites in Food Biotechnology
  • Cholesterol and Lipid Metabolism
  • Cancer, Lipids, and Metabolism
  • Biofuel production and bioconversion
  • Nuclear and radioactivity studies
  • Aquaculture Nutrition and Growth
  • Lipoproteins and Cardiovascular Health
  • Lipid metabolism and biosynthesis
  • Enzyme Catalysis and Immobilization
  • Pineapple and bromelain studies
  • Adsorption and biosorption for pollutant removal
  • Electrospun Nanofibers in Biomedical Applications
  • Botanical Research and Applications
  • Probiotics and Fermented Foods
  • Cardiovascular Health and Disease Prevention
  • Nematode management and characterization studies
  • Algal biology and biofuel production
  • Meat and Animal Product Quality

Universidad Autónoma Metropolitana
2015-2024

Toho University Medical Center Sakura Hospital
1996-2019

Toho University
2001-2019

Central Research Institute of Electric Power Industry
1993-2017

Seirei Hamamatsu General Hospital
2016

Okayama University
1980-2013

TU Dresden
2006-2009

Toshiba (Japan)
2009

Hokkaido University
2007

Universidad Nacional Autónoma de México
2007

Chitin production was biologically achieved by lactic acid fermentation (LAF) of shrimp waste (Litopenaeus vannameii) in a packed bed column reactor with maximal percentages demineralization (DMIN) and deproteinization (DPROT) after 96 h 92 94%, respectively. This procedure also afforded high free astaxanthin recovery up to 2400 μg per gram silage. product obtained from the chemical method using alkali for comparison. The chitin (BIO-C) showed higher Mw (1200 kDa) crystallinity index (ICR)...

10.1021/bm200750t article EN Biomacromolecules 2011-07-26

Abstract Inhibition of radial growth and spore germination Aspergillus niger in media with added chitosan were detected. The highest inhibition (73%) was determined at 24 h 3 g · L −1 chitosan, the percent 40% after 13 inoculation. Further, CC 50 , that is, concentration which is inhibited by 50%, estimated probit analysis (3.5 ). activation energies, E A an Arrhenius model control amended media, obtaining 35.6 36.6 kcal mol respectively. These values same order magnitude because as...

10.1002/mabi.200350024 article EN Macromolecular Bioscience 2003-10-01

Aims: Glimepiride, a third generation sulfonylurea (SU), is known to have extrapancreatic effects, but its vascular effect unclear. We investigated the efficacy of glimepiride in improving arterial stiffness assessed by cardio-ankle index (CAVI) type 2 diabetic patients, compared with glibenclamide, conventional SU. Methods: Forty patients were randomly assigned two groups. One group was administered 1.5 mg/day, and other glibenclamide 1.25 mg/day for 6 months. Results: No significant...

10.1111/j.1742-1241.2010.02399.x article EN International Journal of Clinical Practice 2010-10-14

Chitosan films (CF) with cinnamon bark oil (CO) incorporated at 0% (control), 0.25%, 0.5%, and 1.0% v/v were prepared by an emulsion method. The characterized based on their physical properties (solubility, water vapor permeability, optical property, microstructure) antioxidant (DPPH, ABTS, its protective effects human erythrocytes). results showed that the incorporation of 0.5 CO into CF significantly decreased solubility to 22% control (<mml:math...

10.1155/2015/974506 article EN cc-by International Journal of Polymer Science 2015-01-01

Free astaxanthin one-solvent extractions with ethanol, acetone, and liquid 1,1,1,2-tetrafluoroethane from raw lactic acid fermented (ensilaged) shrimp residues were investigated. The total carotenoid recovery ensilaged wastes was higher than that non-ensilaged ones as assessed by HPLC analyses. Acetone gave the highest extraction yields of free up to 115 µg/g material. Moreover, tetrafluoroethane is reported for first time in a successful carotenoids shrimp.

10.1021/jf071469h article EN Journal of Agricultural and Food Chemistry 2007-11-20

Abstract This study provides information on the use of shrimp head silage protein hydrolysate (SPH) as an alternative source for tilapia feeding. Six diets (28% protein, 12% lipid) were prepared where fishmeal was replaced at levels 0 (control), 10, 15, 20, 25 and 30% with hydrolysate. The supplied to Nile fry (338 mg initial weight) stocked in plastic recirculating 20 l tanks (10 animals per tank), three replicates treatment. After 8 week experimental period, fish fed containing 10 15% SPH...

10.1002/jsfa.1092 article EN Journal of the Science of Food and Agriculture 2002-04-16
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