A significant outbreak of fishy odor occurred in a reservoir located in Inner Mongolia, China, in the winter of 2011, and the odor rating, algal density and concentrations of some potential odorous compounds were moni...A significant outbreak of fishy odor occurred in a reservoir located in Inner Mongolia, China, in the winter of 2011, and the odor rating, algal density and concentrations of some potential odorous compounds were monitored over a period of two months. The peak odor rating of the fishy odor was 7 according to flavor profile analysis. Among the dominant algal species （two diatom and one chrysophyte species） observed during the survey, the chrysophyte Dinobryon sp. was the most abundant species, with the peak density recorded at 88,520 cells/mL. Seven potential algal metabolites including heptanal, 2,4-heptadienal, 2,4-decadienal, nonanal, 2-octenal, 2,6- nonadienal and hexanal were detected. The principal component analysis result showed that n-hexanal, n-heptanal and 2,4-decadienal, possibly the metabolites of diatoms, and 2,4-heptadienal, possibly the metabolite of Dinobryon sp., might have contributed to the fishy odor episode. This study demonstrated that the fishy odor episode in this reservoir might be caused by the abnormal growth of chrysophytes and diatoms under the ice-cover.展开更多
Coir pith is a highly potential adsorbent for adsorbing trimethylamine(TMA). It harbors a higher adsorption capacity for TMA compared to commercial activated carbon(CAC). It was found that lignin and holocellulose ext...Coir pith is a highly potential adsorbent for adsorbing trimethylamine(TMA). It harbors a higher adsorption capacity for TMA compared to commercial activated carbon(CAC). It was found that lignin and holocellulose extracted from coir pith played an important role in TMA adsorption. Lignin itself had the highest TMA adsorption capacity(269.01 mg/g)followed by holocellulose(75.43 mg/g), coir pith(14.3 mg/g) and CAC(10.26 mg/g),respectively. The pseudo-first-and second orders were applied to the kinetic data. For the adsorption of TMA by coir pith, the best fit was achieved by the pseudo-second order.Thermodynamic studies showed an endothermic and physico-chemical adsorption process between TMA and the coir pith. TMA desorption study suggested that only 14%–47% of TMA was desorbed with distilled water. In addition, Fourier transform-infrared(FT-IR) spectra showed that C–H bond(methyl group), C–O bond from phenolic alcohol and C–O bond from tertiary alcohol in lignin and holocellulose were involved in TMA adsorption. Coir pithbased filter showed high TMA adsorption efficiency(98%) and kept constant for more than48 days in a continuous system. Pilot scale experiment, coir pith beads filter could be succesfully applied as a packing material for TMA removal. Therefore, coir pith can be used as a promising packing material for TMA treatment at contaminated site.展开更多
Fluorescent in situ hybridization(FISH) is an important technique in plant genome research,because it provides integrated information about DNA,chromosomes and genomes.Genomic in situ hybridization(GISH) is a modifica...Fluorescent in situ hybridization(FISH) is an important technique in plant genome research,because it provides integrated information about DNA,chromosomes and genomes.Genomic in situ hybridization(GISH) is a modification of FISH that can be used to rapidly compare genome content,relatedness,organization and/or behavior.GISH results often provide insight into genome evolution and species relationships.The cotton genus Gossypium consists of about 50 species,including 5展开更多
Developing recreational fishery is the main way to promote the fisherman transferring their jobs,to enhance their incomes,and to promote the development of the fishing village. The development models of ocean recreati...Developing recreational fishery is the main way to promote the fisherman transferring their jobs,to enhance their incomes,and to promote the development of the fishing village. The development models of ocean recreational fishery of Shandong province were given. According to the development of recreational fishery and management models,the development modes of recreational fisheries can be divided as: individual operation mode,fishermen association mode,the company and fishermen joint venture mode,the government leading mode and enterprises synergetic mode. The new direction of recreational fishery was pointed out at last.展开更多
A fishy odor can significantly hinder the development of products made from nutritious skipjack tuna.To address this issue,rosemary extract(RE)was used as a deodorizing agent for skipjack tuna.Multi-omics techniques,i...A fishy odor can significantly hinder the development of products made from nutritious skipjack tuna.To address this issue,rosemary extract(RE)was used as a deodorizing agent for skipjack tuna.Multi-omics techniques,including e-nose,e-tongue,gas chromatography-ion mobility mass spectrometry(GC-IMS),and gas chromatography-mass spectrometry(GC-MS),were employed to analyze the volatile flavor compounds in the skipjack tuna meat before and after deodorization.The main fishy odors found in the skipjack tuna were identified as nonanal,heptanal,hexanal,and 1-octen-3-ol,primarily resulting from lipid oxidation.Treatment with RE solutions at concentrations of 0.8% and 1.0% completely removed nonanal,hexanal,and heptanal from the skipjack tuna meat,while the level of 1-octen-3-ol was significantly reduced by 67.21%(p<0.05).The GCMS analysis of the impregnated solution indicated a 31% increase in 1-octen-3-ol content at a concentration of 0.2%(p<0.05).Additionally,skipjack tuna meat treated with 0.8% and 1.0%RE showed lower peroxide values and thiobarbituric acid reactive substances values(p<0.05).The reduction of fishy odor by RE was directly linked to decreased lipid oxidation.Quantitative analysis of phenolics revealed that the relative content of phenolics in RE was 52.54%,with the main phenolics being chlorogenic acid,caffeic acid,and luteolin.Thus,RE shows promise in eliminating fishy odors and minimizing lipid oxidation in skipjack tuna.展开更多
The undesirable odor of crab meatballs was evident after boiling and cooling,high-voltage electrostatic field(HVEF),lysozyme and yeast extract(LY),and the combination(LYH)were all applied to pre-deodorize crab meatbal...The undesirable odor of crab meatballs was evident after boiling and cooling,high-voltage electrostatic field(HVEF),lysozyme and yeast extract(LY),and the combination(LYH)were all applied to pre-deodorize crab meatballs to estimate the effect in view of odor,pH,fat oxidation and protein oxidation.None of the tert-butylamine(1.58±0.14 ng/g),(E,E)-2,4-Dodecadienal(18.52±0.12 ng/g),1-Octen-3-ol(13.51±0.22 ng/g)and nonanal(681.55±0.24 ng/g)in the control were detected in LYH group,while nonanal in HVEF and LY groups was reduced by 86.07%and 42.60%,respectively.Thirteen volatile substances with variable importance plot≥1 contributed prominently to the odor of crab meatballs depended on partial least squares discrimination analysis.Protein oxidation of the pretreated crab meatballs was alleviated,as well as thiobarbituric acid reactive substances(TBARS)and lipoxygenase(LOX)activity,with the best inhibitory effect of LYH being 40.10%and 62.80%on the respective effects.The correlation analysis derived that fishy substances were significantly positively correlated with TBARS and pH.LYH was the optimal pre-deodorization,which involved promoting glycolysis and lactic acid bacteria colonization in the liquid medium,and inhibiting fat oxidation by affecting enzyme activity in HVEF.展开更多
基金supported by the National Natural Science Foundation of China(No.5093800721377144)+1 种基金Watershed Eutrophication Management in China through System Oriented Process Modelling of PressuresImpacts and Abatement Actions(No.GJHZ1203)
文摘A significant outbreak of fishy odor occurred in a reservoir located in Inner Mongolia, China, in the winter of 2011, and the odor rating, algal density and concentrations of some potential odorous compounds were monitored over a period of two months. The peak odor rating of the fishy odor was 7 according to flavor profile analysis. Among the dominant algal species （two diatom and one chrysophyte species） observed during the survey, the chrysophyte Dinobryon sp. was the most abundant species, with the peak density recorded at 88,520 cells/mL. Seven potential algal metabolites including heptanal, 2,4-heptadienal, 2,4-decadienal, nonanal, 2-octenal, 2,6- nonadienal and hexanal were detected. The principal component analysis result showed that n-hexanal, n-heptanal and 2,4-decadienal, possibly the metabolites of diatoms, and 2,4-heptadienal, possibly the metabolite of Dinobryon sp., might have contributed to the fishy odor episode. This study demonstrated that the fishy odor episode in this reservoir might be caused by the abnormal growth of chrysophytes and diatoms under the ice-cover.
基金financially supported by King Mongkut's University of Technology Thonburi(KMUTT)through the"KMUTT 55th Anniversary commemorative fund"the Petchra Pra Jom Klao Ph D scholarship(No.05/2557)for financially supporting Mr.Nuttapong Santawee
文摘Coir pith is a highly potential adsorbent for adsorbing trimethylamine(TMA). It harbors a higher adsorption capacity for TMA compared to commercial activated carbon(CAC). It was found that lignin and holocellulose extracted from coir pith played an important role in TMA adsorption. Lignin itself had the highest TMA adsorption capacity(269.01 mg/g)followed by holocellulose(75.43 mg/g), coir pith(14.3 mg/g) and CAC(10.26 mg/g),respectively. The pseudo-first-and second orders were applied to the kinetic data. For the adsorption of TMA by coir pith, the best fit was achieved by the pseudo-second order.Thermodynamic studies showed an endothermic and physico-chemical adsorption process between TMA and the coir pith. TMA desorption study suggested that only 14%–47% of TMA was desorbed with distilled water. In addition, Fourier transform-infrared(FT-IR) spectra showed that C–H bond(methyl group), C–O bond from phenolic alcohol and C–O bond from tertiary alcohol in lignin and holocellulose were involved in TMA adsorption. Coir pithbased filter showed high TMA adsorption efficiency(98%) and kept constant for more than48 days in a continuous system. Pilot scale experiment, coir pith beads filter could be succesfully applied as a packing material for TMA removal. Therefore, coir pith can be used as a promising packing material for TMA treatment at contaminated site.
文摘Fluorescent in situ hybridization(FISH) is an important technique in plant genome research,because it provides integrated information about DNA,chromosomes and genomes.Genomic in situ hybridization(GISH) is a modification of FISH that can be used to rapidly compare genome content,relatedness,organization and/or behavior.GISH results often provide insight into genome evolution and species relationships.The cotton genus Gossypium consists of about 50 species,including 5
基金Supported by the Scientific Research Program of Chinese Ocean Development Study Center(AOCOUC200903)
文摘Developing recreational fishery is the main way to promote the fisherman transferring their jobs,to enhance their incomes,and to promote the development of the fishing village. The development models of ocean recreational fishery of Shandong province were given. According to the development of recreational fishery and management models,the development modes of recreational fisheries can be divided as: individual operation mode,fishermen association mode,the company and fishermen joint venture mode,the government leading mode and enterprises synergetic mode. The new direction of recreational fishery was pointed out at last.
基金funded by the National Key Research and Development Program of China(2023YFD2100200)the Liaoning Revitalization Talents Program(XLYC2202047).
文摘A fishy odor can significantly hinder the development of products made from nutritious skipjack tuna.To address this issue,rosemary extract(RE)was used as a deodorizing agent for skipjack tuna.Multi-omics techniques,including e-nose,e-tongue,gas chromatography-ion mobility mass spectrometry(GC-IMS),and gas chromatography-mass spectrometry(GC-MS),were employed to analyze the volatile flavor compounds in the skipjack tuna meat before and after deodorization.The main fishy odors found in the skipjack tuna were identified as nonanal,heptanal,hexanal,and 1-octen-3-ol,primarily resulting from lipid oxidation.Treatment with RE solutions at concentrations of 0.8% and 1.0% completely removed nonanal,hexanal,and heptanal from the skipjack tuna meat,while the level of 1-octen-3-ol was significantly reduced by 67.21%(p<0.05).The GCMS analysis of the impregnated solution indicated a 31% increase in 1-octen-3-ol content at a concentration of 0.2%(p<0.05).Additionally,skipjack tuna meat treated with 0.8% and 1.0%RE showed lower peroxide values and thiobarbituric acid reactive substances values(p<0.05).The reduction of fishy odor by RE was directly linked to decreased lipid oxidation.Quantitative analysis of phenolics revealed that the relative content of phenolics in RE was 52.54%,with the main phenolics being chlorogenic acid,caffeic acid,and luteolin.Thus,RE shows promise in eliminating fishy odors and minimizing lipid oxidation in skipjack tuna.
基金financial support from National Key R&D Program of China(Contract No.2017YFD0400501)the 111 Project(BP0719028)+1 种基金National First-class Discipline Program of Food Science and Technology(No.JUFSTR20180205)Jiangsu Province Key Laboratory Project of Advanced Food Manufacturing Equipment and Technology(No.FMZ202003)。
文摘The undesirable odor of crab meatballs was evident after boiling and cooling,high-voltage electrostatic field(HVEF),lysozyme and yeast extract(LY),and the combination(LYH)were all applied to pre-deodorize crab meatballs to estimate the effect in view of odor,pH,fat oxidation and protein oxidation.None of the tert-butylamine(1.58±0.14 ng/g),(E,E)-2,4-Dodecadienal(18.52±0.12 ng/g),1-Octen-3-ol(13.51±0.22 ng/g)and nonanal(681.55±0.24 ng/g)in the control were detected in LYH group,while nonanal in HVEF and LY groups was reduced by 86.07%and 42.60%,respectively.Thirteen volatile substances with variable importance plot≥1 contributed prominently to the odor of crab meatballs depended on partial least squares discrimination analysis.Protein oxidation of the pretreated crab meatballs was alleviated,as well as thiobarbituric acid reactive substances(TBARS)and lipoxygenase(LOX)activity,with the best inhibitory effect of LYH being 40.10%and 62.80%on the respective effects.The correlation analysis derived that fishy substances were significantly positively correlated with TBARS and pH.LYH was the optimal pre-deodorization,which involved promoting glycolysis and lactic acid bacteria colonization in the liquid medium,and inhibiting fat oxidation by affecting enzyme activity in HVEF.
