Advances in Chitin/Chitosan Characterization and Applications
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Anti-Obese Effects of Chitosan and Psyllium Husk
Progress in Nutrition 2016; Vol. 18, N. 2: 152-160 © Mattioli 1885 Original Article Anti-obese effects of chitosan and psyllium husk containing vitamin C in Sprague-Dawley (SD) rats fed a high fat diet Eun Young Jung1†, Yang Hee Hong2†, Un Jae Chang3, Hyung Joo Suh4 1Department of Home Economics Education, Jeonju University, Jeonju 560-759, Korea; 2Department of Beauty Art, Suwon Women’s University, Suwon 441-748, Korea; 3Department of Food and Nutrition, Dongduk Women’s University, Seoul 136-714, Korea; 4Department of Public Health Science, Graduate School, Korea University, Seoul 07249, Republic of Korea - E-mail: [email protected]; †Eun Young Jung and Yang Hee Hong contributed equally to this study Summary. We investigated whether vitamin C would enhance the anti-obese effects of chitosan and psyllium husk. The study was carried out with male Sprague-Dawley (SD) rats for 6 wk using the following diet groups. Normal diet (control), high fat diet (F-control), 5% chitosan (chitosan-1), 5% chitosan containing 1% vitamin C (chitosan-2), 10% psyllium husk (psyllium-1), and 10% psyllium husk containing 1% vitamin C (psyllium-2). Chitosan-2 (1.5%) showed a significant (p<0.05) decrease in epididymal fat pad weight as compared to F- control (2.3%) and chitosan-1 (2.1%). The epididymal fat pad weight of psyllium-2 (1.9%) was significantly (p<0.05) lower than that of F-control (2.3%). In conclusion, additions of vitamin C to chitosan and psyllium husk may be useful for reducing body fat. Key words: chitosan, psyllium husk, vitamin C, body weight, body fat Introduction models have indicated the efficacy of dietary fiber in regulating body weight (3, 4). -
Starch-Chitosan) Development: Characterization for Packaging Materials
Open Journal of Organic Polymer Materials, 2016, 6, 11-24 Published Online January 2016 in SciRes. http://www.scirp.org/journal/ojopm http://dx.doi.org/10.4236/ojopm.2016.61002 Biodegradable Colour Polymeric Film (Starch-Chitosan) Development: Characterization for Packaging Materials M. Z. I. Mollah1*, N. Akter2, F. B. Quader2, S. Sultana1, R. A. Khan1 1Nuclear and Radiation Chemistry Division, Institute of Nuclear Science and Technology, Bangladesh Atomic Energy Commission, Dhaka, Bangladesh 2Department of Applied Chemistry and Chemical Engineering, University of Dhaka, Dhaka, Bangladesh Received 13 December 2015; accepted 8 January 2016; published 12 January 2016 Copyright © 2016 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/ Abstract Biodegradable starch-based chitosan reinforced composite polymeric films were prepared by casting. The chitosan content in the films was varied from 20% to 80% (w/w). Tensile strength (TS) was improved significantly with the addition of chitosan but elongation at break (EB %) of the composites decreased. Tensile strength of the composites raised more with the addition of the acacia catechu content in the films varied from 0.05% to 0.2% (w/w). The better thermal stability of this prepared film was confirmed by thermo-gravimetric analysis. Structural characterization was done by Fourier transform infrared spectroscopy. Surface morphologies of the composites were examined by scanning electron microscope (SEM) which suggested sufficient homogeniza- tion of starch, chitosan and acacia catechu. Water uptake was found lower for final composites in comparison to starch/chitosan and chitosan films. -
Chapter 15. Central and Eastern Africa: Overview
Chapter 15 Chapter 15 CENTRAL AND EASTERN AFRICA: OVERVIEW The region as treated here is comprised mainly of Angola, Cameroon, Central African Republic, Congo (Brazzaville), Congo (Kinshasa) (formerly Zaire), Kenya, Malawi, Tanzania, Uganda, and Zambia. The wide variety of insects eaten includes at least 163 species, 121 genera, 34 families and 10 orders. Of this group the specific identity is known for 128 species, only the generic identity for another 21, only the family identity of another 12 and only the order identity of one. Gomez et al (1961) estimated that insects furnished 10% of the animal proteins produced annually in Congo (Kinshasa). Yet, in this region, as in others, insect use has been greatly under-reported and under-studied. Until recently, for example, the specific identity was known for fewer than twenty species of insects used in Congo (Kinshasa), but, in a careful study confined only to caterpillars and only to the southern part of the country, Malaisse and Parent (1980) distinguished 35 species of caterpillars used as food. The extent of insect use throughout the region is probably similar to that in Congo (Kinshasa) and Zambia, the best-studied countries. Research is needed. Caterpillars and termites are the most widely marketed insects in the region, but many others are also important from the food standpoint, nutritionally, economically or ecologically. As stated by this author (DeFoliart 1989): "One can't help but wonder what the ecological and nutritional maps of Africa might look like today if more effort had been directed toward developing some of these caterpillar, termite, and other food insect resources." The inclusion of food insects in the Africa-wide Exhibition on Indigenous Food Technologies held in Nairobi, Kenya, in 1995 is indicative of the resurgence of interest in this resource by the scientific community of the continent. -
Lactobacillus Plantarum ATCC 8014 Successive Two-Step Fermentation
1 Production of chitin from shrimp shell powders using Serratia marcescens B742 and 2 Lactobacillus plantarum ATCC 8014 successive two-step fermentation 3 4 Hongcai Zhang a, Yafang Jin a, Yun Deng a, Danfeng Wang a, Yanyun Zhao a,b* 5 a School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, P.R. 6 China; 7 b Department of Food Science and Technology, Oregon State University, Corvallis 97331-6602, 8 USA 9 10 11 12 13 14 15 16 17 18 * Corresponding author: 19 Dr. Yanyun Zhao, Professor 20 Dept. of Food Science & Technology 21 Oregon State University 22 Corvallis, OR 97331-6602 23 E-mail: [email protected] 1 24 ABSTRACT 25 Shrimp shell powders (SSP) were fermented by successive two-step fermentation of Serratia 26 marcescens B742 and Lactobacillus plantarum ATCC 8014 to extract chitin. Taguchi 27 experimental design with orthogonal array was employed to investigate the most contributing 28 factors on each of the one-step fermentation first. The identified optimal fermentation conditions 29 for extracting chitin from SSP using S. marcescens B742 were 2% SSP, 2 h of sonication time, 30 10% incubation level and 4 d of culture time, while that of using L. plantarum ATCC 8014 31 fermentation was 2% SSP, 15% glucose, 10% incubation level and 2 d of culture time. 32 Successive two-step fermentation using identified optimal fermentation conditions resulted in 33 chitin yield of 18.9% with the final deproteinization (DP) and demineralization (DM) rate of 34 94.5% and 93.0%, respectively. The obtained chitin was compared with the commercial chitin 35 from SSP using scanning electron microscopy (SEM), Fourier transform infrared spectrometer 36 (FT-IR) and X-ray diffraction (XRD). -
Immunostimulatory Properties and Antitumor Activities of Glucans (Review)
INTERNATIONAL JOURNAL OF ONCOLOGY 43: 357-364, 2013 Immunostimulatory properties and antitumor activities of glucans (Review) LUCA VANNUCCI1,2, JIRI KRIZAN1, PETR SIMA1, DMITRY STAKHEEV1, FABIAN CAJA1, LENKA RAJSIGLOVA1, VRATISLAV HORAK2 and MUSTAFA SAIEH3 1Laboratory of Immunotherapy, Department of Immunology and Gnotobiology, Institute of Microbiology, Academy of Sciences of the Czech Republic, v.v.i., 142 20 Prague 4; 2Laboratory of Tumour Biology, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, v.v.i., 277 21 Libechov, Czech Republic; 3Department of Biology, University of Al-Jabal Al-Gharbi, Gharyan Campus, Libya Received April 5, 2013; Accepted May 17, 2013 DOI: 10.3892/ijo.2013.1974 Abstract. New foods and natural biological modulators have 1. Introduction recently become of scientific interest in the investigation of the value of traditional medical therapeutics. Glucans have Renewed interest has recently arisen for both functional foods an important part in this renewed interest. These fungal wall and the investigation of the scientific value of traditional components are claimed to be useful for various medical medical treatments. The evaluation of mushroom derivatives purposes and they are obtained from medicinal mushrooms and their medical properties are important part of these studies. commonly used in traditional Oriental medicine. The immu- Polysaccharides, including the glucans, have been described as notherapeutic properties of fungi extracts have been reported, biologically active molecules (1-4). Certain glucose polymers, including the enhancement of anticancer immunity responses. such as (1→3), (1→6)-β-glucans, were recently proposed as potent These properties are principally related to the stimulation of immunomodulation agents (3-5). -
Yeast Genome Gazetteer P35-65
gazetteer Metabolism 35 tRNA modification mitochondrial transport amino-acid metabolism other tRNA-transcription activities vesicular transport (Golgi network, etc.) nitrogen and sulphur metabolism mRNA synthesis peroxisomal transport nucleotide metabolism mRNA processing (splicing) vacuolar transport phosphate metabolism mRNA processing (5’-end, 3’-end processing extracellular transport carbohydrate metabolism and mRNA degradation) cellular import lipid, fatty-acid and sterol metabolism other mRNA-transcription activities other intracellular-transport activities biosynthesis of vitamins, cofactors and RNA transport prosthetic groups other transcription activities Cellular organization and biogenesis 54 ionic homeostasis organization and biogenesis of cell wall and Protein synthesis 48 plasma membrane Energy 40 ribosomal proteins organization and biogenesis of glycolysis translation (initiation,elongation and cytoskeleton gluconeogenesis termination) organization and biogenesis of endoplasmic pentose-phosphate pathway translational control reticulum and Golgi tricarboxylic-acid pathway tRNA synthetases organization and biogenesis of chromosome respiration other protein-synthesis activities structure fermentation mitochondrial organization and biogenesis metabolism of energy reserves (glycogen Protein destination 49 peroxisomal organization and biogenesis and trehalose) protein folding and stabilization endosomal organization and biogenesis other energy-generation activities protein targeting, sorting and translocation vacuolar and lysosomal -
1471-2164-15-164.Pdf
Meinhardt et al. BMC Genomics 2014, 15:164 http://www.biomedcentral.com/1471-2164/15/164 RESEARCH ARTICLE Open Access Genome and secretome analysis of the hemibiotrophic fungal pathogen, Moniliophthora roreri, which causes frosty pod rot disease of cacao: mechanisms of the biotrophic and necrotrophic phases Lyndel W Meinhardt1*, Gustavo Gilson Lacerda Costa2, Daniela PT Thomazella3, Paulo José PL Teixeira3, Marcelo Falsarella Carazzolle2, Stephan C Schuster4, John E Carlson5, Mark J Guiltinan6, Piotr Mieczkowski7, Andrew Farmer8, Thiruvarangan Ramaraj8, Jayne Crozier9, Robert E Davis10, Jonathan Shao10, Rachel L Melnick1, Gonçalo AG Pereira3 and Bryan A Bailey1 Abstract Background: The basidiomycete Moniliophthora roreri is the causal agent of Frosty pod rot (FPR) disease of cacao (Theobroma cacao), the source of chocolate, and FPR is one of the most destructive diseases of this important perennial crop in the Americas. This hemibiotroph infects only cacao pods and has an extended biotrophic phase lasting up to sixty days, culminating in plant necrosis and sporulation of the fungus without the formation of a basidiocarp. Results: We sequenced and assembled 52.3 Mb into 3,298 contigs that represent the M. roreri genome. Of the 17,920 predicted open reading frames (OFRs), 13,760 were validated by RNA-Seq. Using read count data from RNA sequencing of cacao pods at 30 and 60 days post infection, differential gene expression was estimated for the biotrophic and necrotrophic phases of this plant-pathogen interaction. The sequencing data were used to develop a genome based secretome for the infected pods. Of the 1,535 genes encoding putative secreted proteins, 1,355 were expressed in the biotrophic and necrotrophic phases. -
Changes in the Sclerotinia Sclerotiorum Transcriptome During Infection of Brassica Napus
Seifbarghi et al. BMC Genomics (2017) 18:266 DOI 10.1186/s12864-017-3642-5 RESEARCHARTICLE Open Access Changes in the Sclerotinia sclerotiorum transcriptome during infection of Brassica napus Shirin Seifbarghi1,2, M. Hossein Borhan1, Yangdou Wei2, Cathy Coutu1, Stephen J. Robinson1 and Dwayne D. Hegedus1,3* Abstract Background: Sclerotinia sclerotiorum causes stem rot in Brassica napus, which leads to lodging and severe yield losses. Although recent studies have explored significant progress in the characterization of individual S. sclerotiorum pathogenicity factors, a gap exists in profiling gene expression throughout the course of S. sclerotiorum infection on a host plant. In this study, RNA-Seq analysis was performed with focus on the events occurring through the early (1 h) to the middle (48 h) stages of infection. Results: Transcript analysis revealed the temporal pattern and amplitude of the deployment of genes associated with aspects of pathogenicity or virulence during the course of S. sclerotiorum infection on Brassica napus. These genes were categorized into eight functional groups: hydrolytic enzymes, secondary metabolites, detoxification, signaling, development, secreted effectors, oxalic acid and reactive oxygen species production. The induction patterns of nearly all of these genes agreed with their predicted functions. Principal component analysis delineated gene expression patterns that signified transitions between pathogenic phases, namely host penetration, ramification and necrotic stages, and provided evidence for the occurrence of a brief biotrophic phase soon after host penetration. Conclusions: The current observations support the notion that S. sclerotiorum deploys an array of factors and complex strategies to facilitate host colonization and mitigate host defenses. This investigation provides a broad overview of the sequential expression of virulence/pathogenicity-associated genes during infection of B. -
Generated by SRI International Pathway Tools Version 25.0, Authors S
Authors: Pallavi Subhraveti Ron Caspi Quang Ong Peter D Karp An online version of this diagram is available at BioCyc.org. Biosynthetic pathways are positioned in the left of the cytoplasm, degradative pathways on the right, and reactions not assigned to any pathway are in the far right of the cytoplasm. Transporters and membrane proteins are shown on the membrane. Ingrid Keseler Periplasmic (where appropriate) and extracellular reactions and proteins may also be shown. Pathways are colored according to their cellular function. Gcf_000725805Cyc: Streptomyces xanthophaeus Cellular Overview Connections between pathways are omitted for legibility. -
(12) Patent Application Publication (10) Pub. No.: US 2006/025 1613 A1 Zhang Et Al
US 2006025 1613A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2006/025 1613 A1 Zhang et al. (43) Pub. Date: Nov. 9, 2006 (54) BIODEGRADABLE CHITOSAN-PEG (22) Filed: May 9, 2005 COMPOSITIONS, AND METHODS OF USE Publication Classification (76) Inventors: Miqin Zhang, Bothell, WA (US); Narayan Bhattarai, Seattle, WA (US); (51) Int. Cl. Frederick A. Matsen, Seattle, WA (US) COSB 37/08 (2006.01) C08G 63/9. (2006.01) Correspondence Address: (52) U.S. Cl. ........................ 424/78.27: 525/54.2:536/20 CHRISTENSEN, O'CONNOR, JOHNSON, KINDNESS, PLLC (57) ABSTRACT 1420 FIFTHAVENUE The present invention provides compositions comprising an SUTE 28OO interpolymer of chitosan and polyethylene glycol, wherein SEATTLE, WA 98101-2347 (US) the interpolymer is a liquid below 25°C. and a gel above 35° C. The present invention also provides methods for using the (21) Appl. No.: 11/124,916 compositions to deliver drugs to a living body over time. Patent Application Publication Nov. 9, 2006 Sheet 1 of 7 US 2006/025 1613 A1 6 NHCOCH CHOH 3 4 5 o 1. HO O O 3)-2 O Hong HO H-CH CH O-(CH CHO)CH 3 A2. A 5 O 4 a 3 s 3 2 2 e 1 O O 10 20 30 40 50 60 TEMPERATURE (C) A2.2 Patent Application Publication Nov. 9, 2006 Sheet 2 of 7 US 2006/025 1613 A1 (Std) ALISOOSIA (CINOOSIS)?IWIL 000€00SZ000Z00SI000I009 (CINOOSIS)HWIL º?y 0009000?00SI000Z00SZ000€ (Std) ALISOOSIA Patent Application Publication Nov. 9, 2006 Sheet 3 of 7 US 2006/025 1613 A1 a es S > P M A24. -
A Glucose Biosensor Based on Immobilization of Glucose Oxidase in Chitosan Network Matrix
Chinese Journal of Chemistry, 2005, 23, 275—279 Full Paper A Glucose Biosensor Based on Immobilization of Glucose Oxidase in Chitosan Network Matrix YAO, Hui(姚慧) LI, Nan(李楠) XU, Jing-Zhong(徐锦忠) ZHU, Jun-Jie*(朱俊杰) Key Laboratory of Analytical Chemistry for Life Science, Department of Chemistry, Nanjing University, Nanjing, Jiangsu 210093, China A simple and promising glucose biosensor was constructed by successful entrapment of glucose oxidase (GOD) into chitosan matrix, which was cross-linked with glutaraldehyde (GA). This material provided good biocompatibil- ity and the stabilizing microenvironment around the enzyme. The morphologies and properties of chitosan and chi- tosan/GOD were characterized by FTIR, UV-Vis and SEM techniques. This biosensor exhibited a fast amperometric response to glucose. The linear range for glucose determination was from 1×10-5 to 3.4×10-3 mol•L-1, with a de- tection limit of 5×10-6 mol•L-1 based on S/N=3. The biosensor could retain ca. 90% of its original activity after two weeks of storage under dry conditions at 4 ℃. Keywords chitosan, glucose oxidase, biosensor, glucose, crosslink Introduction tionality. As an attractive structural material, chitosan has good biocompatibility and has been studied as a Chitosan obtained by N-deacetylation of chitin, has support for immobilization of enzyme, and it can retain attracted some attention since chitin is the secondly enzyme activity and improve the performance of bio- most abundant polysaccharide. As a natural product, sensor. chitosan has the inherent properties of biocompatibility, Chitosan is a functional structural material and has biodegradability, chemical inertness, low toxicity, high been studied as a support for the immobilization of en- mechanical strength and hydrophilicity, and good film zyme and cells. -
An Appraisal of the Higher Classification of Cicadas (Hemiptera: Cicadoidea) with Special Reference to the Australian Fauna
© Copyright Australian Museum, 2005 Records of the Australian Museum (2005) Vol. 57: 375–446. ISSN 0067-1975 An Appraisal of the Higher Classification of Cicadas (Hemiptera: Cicadoidea) with Special Reference to the Australian Fauna M.S. MOULDS Australian Museum, 6 College Street, Sydney NSW 2010, Australia [email protected] ABSTRACT. The history of cicada family classification is reviewed and the current status of all previously proposed families and subfamilies summarized. All tribal rankings associated with the Australian fauna are similarly documented. A cladistic analysis of generic relationships has been used to test the validity of currently held views on family and subfamily groupings. The analysis has been based upon an exhaustive study of nymphal and adult morphology, including both external and internal adult structures, and the first comparative study of male and female internal reproductive systems is included. Only two families are justified, the Tettigarctidae and Cicadidae. The latter are here considered to comprise three subfamilies, the Cicadinae, Cicadettinae n.stat. (= Tibicininae auct.) and the Tettigadinae (encompassing the Tibicinini, Platypediidae and Tettigadidae). Of particular note is the transfer of Tibicina Amyot, the type genus of the subfamily Tibicininae, to the subfamily Tettigadinae. The subfamily Plautillinae (containing only the genus Plautilla) is now placed at tribal rank within the Cicadinae. The subtribe Ydiellaria is raised to tribal rank. The American genus Magicicada Davis, previously of the tribe Tibicinini, now falls within the Taphurini. Three new tribes are recognized within the Australian fauna, the Tamasini n.tribe to accommodate Tamasa Distant and Parnkalla Distant, Jassopsaltriini n.tribe to accommodate Jassopsaltria Ashton and Burbungini n.tribe to accommodate Burbunga Distant.