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Prospecting Exopolysaccharides Produced by Selected Bacteria Associated with Marine Organisms for Biotechnological Applications

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chinese Journal of Polymer Science 2015年第2期33卷 236-244页

作者： P.Priyanka A.B.Arun c.c.young P.D.Rekha Yenepoya Research centre Yenepoya University Department of Soil and Environment Sciences National Chung-Hsing University

In this study, bacteria associated with marine organisms were screened for the production of exopolysaccharides（EPSs） on MY media containing sea salts（2.5%-10%）. Three selected isolates were identified as Alteromonas sp. PRIM-21, Nitratireductor sp. PRIM-24 and Enterobacter sp. PRIM-26 using 16 S r RNA gene sequencing. Optimization of the growth and EPS production kinetics in relation to incubation time were assessed. The purified EPS yield was 590, 650 and 540 mg·L-1 culture media respectively in Alteromonas sp. PRIM-21, Nitratireductor sp. PRIM-24 and Enterobacter sp. PRIM-26. Biochemical and FTIR analyses revealed the presence of biologically important functional groups in the EPS produced by all the three isolates. The EPS produced by Nitratireductor sp. PRIM-24 and Alteromonas sp. PRIM-21 showed 2.0% sulfate content. These bacterial EPS also showed antioxidant and emulsifying activities and the EPS produced by Enterobacter ***-26 showed significantly higher antioxidant activities in terms of superoxide（Ic50 0.33 mg·mL -1） and DPPH（Ic50 0.44 mg·mL -1） radical scavenging. It also showed higher emulsifying activities against selected hydrophobic substrates with EI24 values above 60%. From the results of the study, it can be concluded that the isolated bacteria produce EPS that can be investigated in detail for biotechnological applications.

关键词： Marine bacterial exopolysaccharides Alteromonas Nitratireductor Enterobacter Antioxidant activity Emulsification

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New Vertebrate Horizons in china

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地质学报 1937年第Z1期 269-289页

作者： c.c.young cenozoic Research Laboratory Geologival Survey of china

INTRODUcTION Studies on vertebrate palaeontology in china were begun in the lastone and a half *** the year 1920 fossil bones such as thosedescribed by Owen,Lydekker,Koken,Schlosser and others were mostlycollected in ... 详细信息

关键词： New Vertebrate Horizons in china

Preliminary Notes on the Mesozoic Mammals of Lufeng, Yunnan, china

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地质学报 1940年第1期 93-111页

作者： c.c.young cenozoic Laboratory Geological Survey of china

Vertebrate fossils of Yunnan are only previously known by a few tragmentaryfinds belonging to early Tertiary and Plio-Pleistocene age. In October 1938, Mr. M.N. Bien of the Geological Survey of china discovered a rich fossiliferous formationwith two levels of vertebrate remains. Most of the well-preserved fossils were derivedfrom the lower level and contain remains of Dinosaurs which are still under the

关键词： china Yunnan

On tho Triassic Dicynodonts from Shansi

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地质学报 1937年第Z1期 400-418页

作者： c.c.young cenozoic Research Laboratory GeologicaI Survey of china

The occurrence of Dicynodonts in the Triassic beds and short accountson the geological conditions in south-eastern Shansi has already beenreported on an earlier paper.;The present note deals with the descrip-tion of t... 详细信息

关键词： On tho Triassic Dicynodonts from Shansi than

New Triassic and cretaceous Reptiles in china(With some Remarks concerning the cenozoic of china)

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地质学报 1937年第1期 124-135页

作者： c.c.young cenozoic Research Laboratory Geological Survey of china

In summer 1936 I had the pleasure to make two field-reconnaissanceawith *** of the University of *** aim of ourjourneys was to prospect the big Triassic and cretaceous formationsfilling the Shansi and Szechuan basins *** spite of theirextension and of their good exposures these two powerful continentalseries had only yielded so far an amazingly small number of vertebratefossils.

关键词： New Triassic and cretaceous Reptiles in china With some Remarks concerning the cenozoic of china

An Early Tertiary Vertebrate Fauna from Yuauchü

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地质学报 1937年第Z1期 420-445页

作者： c.c.young cenozoic Research Laboratory Geological Survey of china

In the Yuanchü-Mienchih border along the Huangho,a very promis-ing early Tertiary basin was known and first reported by Andersson.;The fauna was later described by Zdansky.;Although most of the formsdescribed are in ... 详细信息

关键词： An Early Tertiary Vertebrate Fauna from Yuauch

A New Stegodon from Kwangsi

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地质学报 1938年第Z1期 219-226+440页

作者： c.c.young cenozoic Research Laboratory Geological Survey of china

Recently *** of the Geological Survey of china hascollected in situ an anterior part of a lower right third molar from thefamous tin-bearing gravels in Papu;,***.A careful examination

关键词： A New Stegodon from Kwangsi

On a Miocene Mammalian Fauna from Shantuug

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地质学报 1937年第2期 216-254页

作者： c.c.young cenozoic Laboratory Geological Survey of china

The discovery of a Miocene mammalian fauna in Shanwang,Shantung,and the geological conditions of the site have already beenreported in an earlier paper;and need no repetition.A preliminary listof the fossils was given... 详细信息

关键词： On a Miocene Mammalian Fauna from Shantuug

Notes on some Newly Discovered late cenozoic Mammals from Southwestern and Northwestern china

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地质学报 1941年第1期 101-110页

作者： c.c.young cenozoic Research Laboratory Geological Survey of china.

The materials included in this short paper were collected from Yunnan,Kuangsi,Szechuan,Shensi and Kansu by members of the National GeologicalSurvey of china and men who are interestsd in geology and ***

关键词： Notes on some Newly Discovered late cenozoic Mammals from Southwestern and Northwestern china