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Economic analysis of shrimp culture in ThailandTokrisna, Ruangrai Manyanondh January 1979 (has links)
Photocopy of typescript. / Thesis (Ph. D.)--University of Hawaii at Manoa, 1979. / Bibliography: leaves 112-115. / Microfiche. / x, 115 leaves ill. 29 cm
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Isolation of a natural antioxidant from shrimp wasteLi, Shiao Jing 02 August 1994 (has links)
Shrimp waste samples were extracted with a variety of
organic solvents. Each fraction was measured for
antioxidant activity by determining the rate of oxidation of
β-carotene-linoleic acid in an emulsion system. An ethanol
extract exhibited the highest antioxidant activity.
Purification of the most active fraction was accomplished by
thin layer chromatography (TLC) and high performance liquid
chromatography (HPLC). Antioxidant activity was not
significantly effected by heating at 100°C for 4 hr or 30
days storage at 4°C.
Purified antioxidant samples were further analyzed by
several spectroscopy methods such as Fourier transformed-infrared
spectroscopy (FT-IR), mass spectrometry and nuclear
magnetic resonance (NMR). The antioxidant was characterized
as an ortho-disubstituted benzene. The content of
antioxidant in shrimp waste was estimated to be 1.80 ppm.
Antioxidant from shrimp waste was extracted and
partially purified by silica gel glass column
chromatography. Two species of rockfish (Sebastolobus
alascanus, Sebastes ruberriumus) were treated with crude
antioxidant solution respectively, while rockfish fillets
(Sebastes alutus) were treated with different concentrations
of antioxidant solutions from the column chromatography.
Higher a* values were found in rockfish samples treated with
antioxidants compared to the control without antioxidant
during iced storage. Furthermore, rockfish fillets treated
with 0.20%, and 0.50% (w/v) antioxidant had lower
2-thiobarbituric acid (TBA) values compared to the control
group of rockfish fillets (Sebastes alutus).
Crude extract (0.50% w/w), and purified antioxidant
(0.10%, 0.20%, and 0.50% w/w) from shrimp waste were applied
to sablefish mince and evaluated for their effectiveness to
inhibit oxidative and hydrolytic rancidity of mince samples.
Treatments with crude extract (0.5%), partially purified
antioxidant (0.2%, 0.5%) had a significantly lower TBA, and
peroxide value (PV) compared to the control group during
refrigerated (4°C) and frozen storage (-20°C). The results
from free fatty acid values suggested that antioxidant from
shrimp waste had no effect on hydrolytic rancidity in
sablefish mince. / Graduation date: 1995
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A feasibility study of commercial shrimp breeding in Hong Kong: research report.January 1980 (has links)
by Wong Cheung-on, Li, Yun-hoi. / Title also in Chinese. / Summary in Chinese. / Thesis (M.B.A.)--Chinese University of Hong Kong, 1980. / Bibliography: leaves 164-165.
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Feeding behaviour of the early life history stages of the shrimp Metapenaeus ensis.January 1991 (has links)
by Patrick Kah Kin Leong. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1991. / Includes bibliographical references. / ABSTRACT --- p.i / ACKNOWLEDGEMENTS --- p.iii / TABLE OF CONTENTS --- p.iv / LIST OF TABLES --- p.vii / LIST OF FIGURES --- p.viii / LIST OF PLATES --- p.xi / LIST OF ABBREVIATIONS --- p.xii / Chapter CHAPTER1 --- INTRODUCTION --- p.1 / Chapter CHAPTER2 --- LITERATURE REVIEW / Chapter 2.1 --- Biology of Metapenaeus ensis --- p.4 / Chapter 2.2 --- Definitions in the measurements of zooplankton feeding rate --- p.5 / Chapter 2.3 --- Zooplankton feeding rates and food concentration --- p.6 / Chapter 2.4 --- Other factors affecting feeding behaviour --- p.11 / Chapter 2.5 --- Feeding patterns of the early life history stages in various crustaceans --- p.14 / Chapter 2.6 --- Selective feeding --- p.17 / Chapter CHAPTER3 --- LARVAL DEVELOPMENT OF Metapenaeus ensis / Chapter 3.1 --- Introduction --- p.20 / Chapter 3.2 --- Materials and Methods --- p.22 / Chapter 3.3 --- Results --- p.25 / Chapter 3.4 --- Discussion --- p.52 / Chapter CHAPTER4 --- THE GRAZING BEHAVIOUR OF EARLY LIFE HISTORY STAGES OF Metapenaeus ensis / Chapter 4.1 --- Introduction --- p.86 / Chapter 4.2 --- Materials and Methods --- p.87 / Chapter 4.3 --- Results --- p.90 / Chapter 4.4 --- Discussion --- p.94 / Chapter CHAPTER5 --- THE SELECTIVE FEEDING BEHAVIOUR OF EARLY LIFE HISTORY STAGES OF Metapenaeus ensis / Chapter 5.1 --- Introduction --- p.109 / Chapter 5.2 --- Materials and Methods --- p.110 / Chapter 5.3 --- Results --- p.115 / Chapter 5.4 --- Discussion --- p.117 / Chapter CHAPTER6 --- CONCLUSION --- p.133 / REFERENCES --- p.136
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Antimicrobial Interventions to Reduce Listeria spp. Contamination on ShrimpWong, Tsui-Yin 14 January 2010 (has links)
The effects of selected antimicrobials, applied singularly or in combination, and frozen or refrigerated storage conditions on the survival of Listeria spp. on inoculated shrimp was evaluated in this study. A combination of
0.5% CPC (Cetylpyridinium Chloride) with a water wash at room temperature and freezing of the shrimp at -22.3 degrees C was the only treatment that had a
significant antimicrobial effect on the Listeria spp. Antimicrobial effects and the
mode of action of PEF (Pulsed Electric Field) and CPC on Listeria cells were
evaluated in detailed studies. PEF in 0.1% sodium chloride had a bacterostatic
effect toward Listeria spp. during refrigerated storage, but no immediate or
bacteriostatic effect was caused by freezing the samples. A concentration of 1%
sodium chloride reduced the Listeria spp. population after freezing by 1.1 log;
however, the pungent chlorine odor that was generated during treatment might
cause discomfort for employees in shrimp processing facilities. Also, chlorine
might cause corrosion of metal surfaces of processing equipment. There was no
difference in the antimicrobial effects on the survival of Listeria spp. by PEF between the exposure times of 1 or 2 min, as well as in the sodium chloride
concentrations of 0.1 and 0.5%. PEF treatment in the presence of 0.1% sodium
chloride is recommended. A solution of 0.5% CPC effectively inhibited all of the
strains of Listeria spp. in the cell suspensions. A treatment of 0.5% CPC
combined with PEF treatment in a sodium chloride concentration of 0.1%
caused a delayed effect on the Listeria spp. after 2 d of refrigerated storage.
After 2 d of frozen storage, the formation of ice crystals was decreased in the
number of Listeria spp. when contaminated samples were treated with water.
The results indicated chemicals (e.g. CPC and NaCl) might protect Listeria spp.
from the formation of ice crystals. TEM (Transmission Electron Microscopy)
micrographs revealed that cell membranes were damaged by PEF treatment
and that cells were ruptured by CPC treatment. A maximum reduction of 2.76
log10 CFU/g of Listeria spp. on shrimp was achieved by a combination of PEFCPC.
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Feeding rates of the mud shrimp Upogebia pugettensis and implications for estuarine phytoplankton abundance /Griffen, Blaine D. January 1900 (has links)
Thesis (M.S.)--Oregon State University, 2002. / Typescript (photocopy). Includes bibliographical references (leaves 70-74). Also available online.
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Studies on digestive enzymes from the hepatopancreas of the Indian white shrimp, Penaeus indicusOmondi, James Gordon January 1995 (has links)
No description available.
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Sustainability of rice-shrimp farming system in a brackish water area in the Mekong Delta of Vietnam /Tran, Thanh Be. Unknown Date (has links)
Thesis (MSc. Sys. Ag. (Honours))--University of Western Sydney, Hawkesbury, 1994. / "A thesis submitted for the degree of Master of Science (Honours) in Systems Agriculture."
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Fisheries biology, ecology and recreational harvesting of ghost shrimp (trypaea australiensis) in south-eastern AustraliaRotherham, Douglas. January 2004 (has links)
Thesis (Ph.D.)--University of Wollongong, 2004. / Typescript. Includes bibliographical references.
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The deep-water red shrimp, Aristaeomorpha foliacea, of the Sicilian Channel : biology and exploitation /Bianchini, Marco, January 1999 (has links)
Thesis (Ph. D.)--University of Washington, 1999. / Vita. Includes bibliographical references (leaves 287-338).
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