Search Results - (Author, Cooperation:H. An)

2018-01-20

American Association for the Advancement of Science (AAAS)

2375-2548

Natural Sciences in General

2018-02-10

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Geosciences

Computer Science

Medicine

Natural Sciences in General

Physics

Physics

2018-02-16

The American Association for Cancer Research (AACR)

1078-0432

1557-3265

Medicine

2015-05-09

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

2018-11-16

American Physical Society (APS)

0031-9007

1079-7114

Physics

Condensed Matter: Electronic Properties, etc.

2014-02-21

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

2018-03-06

American Society of Hematology (ASH)

0006-4971

1528-0020

Biology

Medicine

Pediatric Hematology, Sickle Cell Disease, Transfusion Medicine, Free Research Articles, Red Cells, Iron, and Erythropoiesis

2018-03-24

American Association for the Advancement of Science (AAAS)

2375-2548

Natural Sciences in General

2018-03-12

American Association for the Advancement of Science (AAAS)

2375-2548

Natural Sciences in General

2018-02-24

American Association for the Advancement of Science (AAAS)

2375-2548

Natural Sciences in General

2018-10-19

American Society of Hematology (ASH)

0006-4971

1528-0020

Biology

Medicine

Sickle Cell Disease, Free Research Articles, Red Cells, Iron, and Erythropoiesis, CME article

1750-3841

Blackwell Publishing Journal Backfiles 1879-2005

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Process Engineering, Biotechnology, Nutrition Technology

: Oxidative stability of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) and volatile and oxidized volatile compounds in 2 types of DHA-enriched fish oil, triacylglycerol (TG) and ethyl ester (EE), were studied during storage at 80 °C with aeration. The rate of DHA autoxidation was higher than that of EPA. DHA in EE form was more susceptible to autoxidation than in TG form. Thirty-one volatile compounds were identified in EE and 23 volatile compounds in TG. (E)-2-pentenal, 2-(1-pentenyl) furan, and (E,E)-2,4-heptadienal were commonly detected as oxidized volatile compounds from TG and EE fish oil. These volatile oxidized compounds might be formed mainly from the oxidation of DHA and EPA, the main fatty acids of the oil.

Electronic Resource

1750-3841

Blackwell Publishing Journal Backfiles 1879-2005

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Process Engineering, Biotechnology, Nutrition Technology

Distribution of histamine-producing bacteria in fresh albacore and their proliferation in muscle during storage at 25 °C were monitored. Histamine formers constituted a minor portion of the bacterial flora in albacore. Only weak histamine formers were detected in the gill and skin of fresh fish after enrichment. Histamine formers were isolated from the muscles when APC reached 〉107 CFU/g during storage. Hafnia alvei was most prevalent in both fresh and temperature-abused fish. The most prolific histamine former, Morganella morganii, was rarely isolated even from spoiled muscles. The prevalence of weak histamine formers resulted in low levels of histamine accumulation in muscle, 67.1 mg/100 g, for 6 d of storage.

Electronic Resource

1750-3841

Blackwell Publishing Journal Backfiles 1879-2005

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Process Engineering, Biotechnology, Nutrition Technology

Morganella morganii was studied for its growth and histamine formation in mackerel, albacore, mahi-mahi, and salmon stored at various temperatures from -30 °C to 37 °C. The optimal temperature for histamine formation was 25 °C. Mackerel, albacore, and mahi-mahi were shown as good substrates for histidine decarboxylation by M. morganii at elevated temperatures (〉 15 °C). M. morganii inoculated in all fish species including salmon formed histamine above the FDA guideline. Their growth was controlled by cold storage of the fish at 4 °C or below, but histamine formation was controlled only by frozen storage. Although histamine was not detected in any frozen samples, it accumulated rapidly in the previously frozen fish stored at 25 °C.

Electronic Resource

1089-7550

AIP Digital Archive

Physics

Photoluminescence properties of undoped wurtzite GaN epilayers grown on sapphire substrates with different buffer layer treatment conditions in metalorganic chemical vapor deposition (MOCVD) growth have been studied as a function of temperature. At low temperatures, very well resolved spectral features associated with the GaN band structure were observed. From the photoluminescence (PL) data for free excitons, an accurate value of the A exciton binding energy was found. The localization energies of the excitons bound to neutral acceptor are found to agree with Haynes' rule with the proportionality factor close to 0.1. The longitudinal optical (LO) phonon assisted photoluminescence associated with both the bound and free excitons has been observed. The characteristics of free excitons and their LO phonon replica have been studied in detail with the temperature variation and related to the point defects. The behavior of the peak energy and the full width at half maximum of the exciton band as a function of temperature reveals the change of the dominant recombination mechanism of the exciton with the temperature. Besides, all samples show peaks in the energy range of 3.15–3.19 eV, whose intensities vary with the annealing time of the buffer layer. We found that these peaks are related to the Zn impurity, which is unintentionally incorporated due to the memory effect in the MOCVD system. Intensities of Zn impurity related recombination and yellow band luminescence are also examined as functions of the temperature and annealing time of the buffer layer. Based on these temperature dependent PL results, the optimum growth conditions have been suggested. © 1999 American Institute of Physics.

Electronic Resource

1365-2109

Blackwell Publishing Journal Backfiles 1879-2005

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

In the present paper, the results of a study on changes in the proximate and amino acid composition of the eggs and larvae of two Australian native Percichthyid fish, Macquarie perch, Macquaria australasica Cuvier, and trout cod, Maccullochella macquarensis (Cuvier), are presented. The stages of development studied were unfertilized and fertilized eggs, newly hatched larvae, and post-yolk-sac larvae (in Macquarie perch only). In Macquarie perch, significant changes in moisture content occurred throughout development, but this was not so in trout cod. The protein content (per cent dry weight) in Macquarie perch larvae only decreased significantly after hatching (P 〈 0.05). On the other hand, the total lipid (by dry weight) increased significantly during this transformation (P 〈 0.05), and decreased significantly in yolk-sac-resorbed larvae. In trout cod, the protein and lipid content did not change significantly up to hatching. The ash content increased significantly in newly hatched and yolk-sac-resorbed larvae of both species. The total amino acid contents of unfertilized eggs, fertilized eggs, newly hatched larvae and yolk-sac-resorbed larvae of Macquarie perch and trout cod were 5752, 4652, 3696 and 2723 μmol g−1 (dry weight), and 4688. 3448 and 2329 μmol g−1, respectively. In the amino acid pool in Macquarie perch, the essential amino acids (EAAs) leucine, isoleucine and valine, and the non-essential amino acids (NEAAs) alanine, aspargine and glutamate occurred in the greatest quantities in non-fertilized eggs, and the cysteine content was the smallest. In Macquarie perch, five out of nine EAAs (i.e. isoleucine, leucine, lysine, threonine and valine) and six out of eight NEAAs (i.e. alanine, asparagine, glutamate, glycine, proline and serine) decreased significantly (P 〈 0.05) from one developmental stage to the other. In trout cod, all the EAAs, barring lysine and all the NEAAs decreased significantly with development.

Electronic Resource

1750-3841

Blackwell Publishing Journal Backfiles 1879-2005

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Process Engineering, Biotechnology, Nutrition Technology

Beef plasma protein (BPP), egg white and potato extract were tested for their ability to inhibit proteolysis in fish mince and surimi made from Pacific whiting (Merluccius productus). Strong inhibition resulted from all three compounds in fish mince when measured by autolysis. However, when tested in surimi significant differences occurred among the compounds. BPP showed strongest inhibition of proteolytic effect followed by egg white and potato extract when measured by autolysis, gel electrophoresis and torsion. BPP was an effective inhibitor in surimi at a concentration as low as 1%.

Electronic Resource

1600-0668

Blackwell Publishing Journal Backfiles 1879-2005

Architecture, Civil Engineering, Surveying

Medicine

Electronic Resource

1750-3841

Blackwell Publishing Journal Backfiles 1879-2005

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Process Engineering, Biotechnology, Nutrition Technology

Proteins were extracted from raw or cooked pink (Penaeus duorarum), white (Penaeus setiferus) or rock shrimp (Sicyonia brevirostris) with five different solutions: water, water homogenate adjusted to pH 8.0, 0.1M NaCl, 1% SDS, or 8M urea. Each extract from each species was analyzed using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Water extraction showed highly species-specific banding patterns for raw shrimp, while patterns for SDS extracts were not as species-specific. However, SDS extracts provided the greatest information on species variation of cooked shrimp. SDS-PAGE was useful in distinguishing shrimp of different genus. This technique was tested and proven in a blind study to be useful for species identification and detection (within 10% of actual amount) of fabricated products.

Electronic Resource

1750-3841

Blackwell Publishing Journal Backfiles 1879-2005

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Process Engineering, Biotechnology, Nutrition Technology

: The proteolytic activity of octopus arm muscle exhibited optimum activity at 40°C and 60°C, at optimum pH 2.5 and 4.0, respectively. The proteinases were inhibited strongly by cysteine- and aspartic-proteinase inhibitors and, to a lesser degree, by serine-proteinase inhibitors at 40°C, and by cysteine-proteinase inhibitors at 60°C. High pressure did not modify the temperature and pH autolytic activity profiles. The autolytic activity at 40°C was reduced by high pressure; however, it was increased at an incubation temperature of 60°C, mainly in muscle pressurized at 7°C. Aspartic-proteinase was the most sensitive to high pressure. The autolysis of myofibrillar proteins was reduced by high pressure, which was evident in MHC band.

Electronic Resource