To clarify the effect of down-regulated expression of fad2 gene on the seed nutritional quality of rapeseed, the fatty acid composition, amino acid composi- tion, oil content, protein content, crude fiber content and ...To clarify the effect of down-regulated expression of fad2 gene on the seed nutritional quality of rapeseed, the fatty acid composition, amino acid composi- tion, oil content, protein content, crude fiber content and glucosinolate content in the seeds of both transgenic line W-4 and its control Westar were compared. The re- sults showed that the oleic acid content in W-4 was 86.03%±0.20%, which was 29.36% higher than that in the control (P〈0.01); the linoleic acid content was 2.86%± 0.01%, which was reduced by 84.03% compared with that in the control (P〈0.01); the linolenic acid content in W-4 was 3.04%±0.04%, reduced by 57.60% (P〈0.01); the palmitic acid content in W-4 was 3.23%±0.07%, reduced by 18.63% (P〈0.01); the eicosenoic acid content in W-4 was increased by 18.46% compared with that in the control (P〈0.01); the erucic acid content in W-4 was increased by 13.15% (P〈 0.05); there was no significant difference in stearic acid content between the treat- ment and control groups (P〉0.05). The amino acid composition analysis showed that total 18 amino acids, including 8 essential amino acids, were detected in both W-4 and Westar; there were no significant differences in contents of the 18 amino acids between the treatment and control groups except that of tyrosine (P〉0.05); the contents of oil, proteins, glucosinolates and crude fiber in W-4 were 45.40%± 0.17% (P〉0.05), 18.18%±0.91% (P〉0.05), 18.20%±1.21% (P〉0.05) and 12.29%± 0.04% (P〉0.05), respectively. All the results above showed that the down-regulated expression of fad2 had great effects on fatty acid composition and accumulation in rapeseed seeds, but had no significant effects on other seed quality traits, such as oil content, protein content, crude fiber content and glucosinolate content.展开更多
[Objective] This study aimed to investigate the optimal component of culti- vation medium for container seedling raising of Camellia oleifera. [Method] In the application of container nursery technology of Camellia ol...[Objective] This study aimed to investigate the optimal component of culti- vation medium for container seedling raising of Camellia oleifera. [Method] In the application of container nursery technology of Camellia oleifera grafting in emergent stocks, yellow clay soil, surface soil of pine forest, decomposed edible fungus, peat soil, dung and dirt were mixed by different proportions into five formulae as nursery substrates, with garden soil as the control, in order to investigate the influences of various substrates on the growth of annual Camellia oleifera container seedlings by using randomized block design based on variance analysis and multiple comparisons, and to screen the optimal substrate formula for container nursery of Camellia oleifera. [Result] The influences of different substrates on the transplanting survival rate, seedling height, basal diameter, height-diameter ratio and lateral root length of Camellia oleifera container seedlings were significantly different. Various growth indi- cators of Camellia oleifera container seedlings cultivated in the substrate containing 40% of yellow clay soil + 15% of surface soil of pine forest + 20% of decomposed edible fungus + 20% of peat soil + 5% of dung and dirt exceeded that of the control and other substrate formulae, which could be used as the optimal substrate formula for the container nursery of Camellia oleifera. [Conclusion] This study screened the optimal substrate formula for the container nursery of Camellia oleifera, which provided technical reference for the cultivation of Camellia oleifera container seedlings.展开更多
A piston-cylinder apparatus was established to measure the solubility and diffusivity of air in dimethyl silicone oils and in hydraulic oils based on the PVT state equation of air and the solution of unsteady one-dime...A piston-cylinder apparatus was established to measure the solubility and diffusivity of air in dimethyl silicone oils and in hydraulic oils based on the PVT state equation of air and the solution of unsteady one-dimensional diffusion equation.The measured diffusivity-temperature relation can be well fitted by the Arrhenius equation for engineering applications.The correlation between the solute diffusivity D and solvent viscosity μ is examined.In terms of Eyring's activation theory,the activation in the air-silicone-oil diffusion process is quite different from that in the momentum transport of the silicone oil:the activation entropy of the former is positive while that of latter is negative.However,the activation enthalpies of the two processes are in the same order of magnitude,which leads to the observation that Dμ/T is roughly constant.展开更多
[Objective] The paper aimed to determine the fatty acid components and contents,and measure the fractional protein and the amino acid components of Desi chickpea seeds.[Method] The oil of Desi chickpea seeds was extra...[Objective] The paper aimed to determine the fatty acid components and contents,and measure the fractional protein and the amino acid components of Desi chickpea seeds.[Method] The oil of Desi chickpea seeds was extracted from their kernels collected from Xinjiang.The contents and components of fatty acids were tested by GC-MS.The fractional extraction was used to get the proteins of their kernels,and then the content of protein was tested.The amino acid compositions of the proteins were also analyzed.[Result] The fat content of chickpea seeds was as high as up to 18.2%,among which,the unsaturated fatty acids oleic acid and linoleic acid were the major component,accounting for 80% of the total fatty acids;the content of saturated fatty acid was low.The average content of protein was 23.71% in chickpea seeds.Globulin and albumin were the main protein in chickpea seeds,accounting for more than 80% of the total proteins,while glutelin and gliadin contents were low.All the proteins got from chickpea seeds belonged to complete protein,which contained 18 kinds of amino acids.The content of Glu was the highest(15.8%),and the content of Asp was 10.7%,followed by Arg(9.30%),Leu(7.56%),Lys(6.34%),Phe,Ala,Val and Ile.The contents of Trp,Met and Cys were the least.The chickpea seed was rich in essential amino acids.[Conclusion] The Desi chickpea was a legume crop containing high content of unsaturated fatty acids and rich in amino acids.展开更多
The preparation of macauba fruits (Acrocomia aculeate (Jacq.) Lodd. ex Martius) both for oil extraction by continuous pressing and biodiesel production were investigated. The fruits and its pulp and kernel were ch...The preparation of macauba fruits (Acrocomia aculeate (Jacq.) Lodd. ex Martius) both for oil extraction by continuous pressing and biodiesel production were investigated. The fruits and its pulp and kernel were characterized for their resulting oils. Experimental design was carried out to study the transesterification of each oil to obtain the concentrations of ethanol and catalyst that would provide the best biodiesel yield. A higher amount of biodiesel was produced from the best conditions to evaluate some characteristics as specified by ANP (National Agency of Petroleum, Natural Gas and Biofuels). The results showed a variation in the fruits composition and different characteristics presented by the pulp and kernel oil. It was possible to define technological steps to obtain oil from the fruits of macauba and find the optimal conditions to biodiesel production, concentration of catalyst 4.42% and 5% and 13.3:1 and 9:1 ethanol:oil molar ratio to kernel oil and pulp oil, respectively.展开更多
A new silica sol binder was obtained by mixing the acid-modified aluminium sulfate and water glass. The effect of SiO2 concentration in sodium silicate, pH value and polymerization was investigated. The new silica sol...A new silica sol binder was obtained by mixing the acid-modified aluminium sulfate and water glass. The effect of SiO2 concentration in sodium silicate, pH value and polymerization was investigated. The new silica sol binder, which possessed abundant pore volume and suitable acid amount, was an ideal component for preparing cracking catalyst. As a result, the corresponding catalyst comprising the new binder showed excellent performance. Compared with the reference sample, the liquefied petroleum gas(LPG) and propylene yield obtained over this catalyst increased by 3.49 and 1.20 percentage points, respectively. The perfect pore structure and suitable Lewis acid amount of new silica sol were the possible reason leading to its outstanding performance.展开更多
[Objective] The aim was to investigate the fatty acid and amino acid components of Agriophyllum squarrosum seeds from Xinjiang.[Method] The oil sample was extracted from kernels of A.squarrosum seeds collected from Xi...[Objective] The aim was to investigate the fatty acid and amino acid components of Agriophyllum squarrosum seeds from Xinjiang.[Method] The oil sample was extracted from kernels of A.squarrosum seeds collected from Xinjiang for measuring the components and contents of fatty acids with GC-MS;semi-micro Kjeldahl method and fractional extraction were conducted to get the proteins from the kernels and determine amino acids of the proteins.[Result] The fat content of A.squarrosum seeds was as high as up to 13.7%,among which unsaturated fatty acid and linoleic acid were the major components,accounting for more than 80% of the total fatty acids,while saturated fatty acid content was lower.The content of crude proteins was 24.37% in A.squarrosum seeds,in which globulin and albumin were the main components,accounting for more than 80% of the total proteins,while glutenin,gliadin and residue proteinswere less.Protein got from A.squarrosum seeds belonged to complete protein,contained 18 kinds of amino acids.The content of glutamic acid was the highest(18.3%),followed by arginine(9.46%),aspartate(9.27%),leucine(6.67%),phenylalanine(5.04%),serine,methionine,lysine,valine,cystine,histidine and tryptophane.In addition,A.squarrosum seed was rich in essential amino acid.[Conclusion] The paper will provide reference for comprehensive development of A.squarrosum resources from Xinjiang.展开更多
Fatty acids' ethyl and methyl esters are not natural components of edible vegetable oils and therefore should not be present in virgin olive oils. Among the quality requirements for extra virgin olive oils, the Inter...Fatty acids' ethyl and methyl esters are not natural components of edible vegetable oils and therefore should not be present in virgin olive oils. Among the quality requirements for extra virgin olive oils, the International Olive Council (IOC) Norm, 2015 review, set limits for the ethyl ester content at ≤ 435 ppm for the 2014/2015 and 2015/2016 harvests and at ≤ 30 ppm for the 2016/2017 harvest. The purpose of this paper is to: (a) determine the alkyl ester content in two extra virgin olive oils (of the Arbequina and Coratina varieties) as parameters of quality at the moment of their elaboration and to assess the length of their shelf life, over a 12 month period at room temperature; (b) determine extra virgin olive oils' free alcohols content as these may esterify due to the free fatty acids present during storage. After 6 months of storage, the Arbequina oil's ethyl ester content was 32 ppm, and the Coratina's was 46 ppm. As a result, the shelf life for both was only about half a year (labeling usually indicates it must be consumed "before 1 year"). However, parameters related to oxidation (peroxide index, K 232, K 270 and AK) remained within the limits set by the International Olive Council (IOC) throughout the year. In conclusion: ethyl ester content is a very fine parameter for assessing the quality of extra virgin in an olive oil and determining the length of its shelf life.展开更多
Low-temperature viscosity of lube oils mixed with paraffinic base oil and naphthenic base oil at different mass ratios has been tested by experiments. The influence of paraffinic base oil on the performance of naphthe...Low-temperature viscosity of lube oils mixed with paraffinic base oil and naphthenic base oil at different mass ratios has been tested by experiments. The influence of paraffinic base oil on the performance of naphthenic base oil was investigated by studying the low-temperature viscosity of tested oils. The viscosity of lube oils increased with an increasing content of high-viscosity paraffinic base oil in the oil mixture. And the low-temperature viscosity was less influenced when the content of paraffinic base oil in the mixture was insignificant. In order to reduce the cost for formulating lubricating oil, a small fraction of paraffinic base oil can be added into naphthenic base oil as far as the property of lubricating oil can meet the specification. According to the study on low-temperature viscosity of the oil mixed with paraffinic base oil and naphthenic base oil, a basic rule was worked out for the preparation of qualified lubricating oils.展开更多
基金Supported by National Rapeseed Industrial Technology System(CARS-13)"948"Project of Ministry of Agriculture(2011-G23)~~
文摘To clarify the effect of down-regulated expression of fad2 gene on the seed nutritional quality of rapeseed, the fatty acid composition, amino acid composi- tion, oil content, protein content, crude fiber content and glucosinolate content in the seeds of both transgenic line W-4 and its control Westar were compared. The re- sults showed that the oleic acid content in W-4 was 86.03%±0.20%, which was 29.36% higher than that in the control (P〈0.01); the linoleic acid content was 2.86%± 0.01%, which was reduced by 84.03% compared with that in the control (P〈0.01); the linolenic acid content in W-4 was 3.04%±0.04%, reduced by 57.60% (P〈0.01); the palmitic acid content in W-4 was 3.23%±0.07%, reduced by 18.63% (P〈0.01); the eicosenoic acid content in W-4 was increased by 18.46% compared with that in the control (P〈0.01); the erucic acid content in W-4 was increased by 13.15% (P〈 0.05); there was no significant difference in stearic acid content between the treat- ment and control groups (P〉0.05). The amino acid composition analysis showed that total 18 amino acids, including 8 essential amino acids, were detected in both W-4 and Westar; there were no significant differences in contents of the 18 amino acids between the treatment and control groups except that of tyrosine (P〉0.05); the contents of oil, proteins, glucosinolates and crude fiber in W-4 were 45.40%± 0.17% (P〉0.05), 18.18%±0.91% (P〉0.05), 18.20%±1.21% (P〉0.05) and 12.29%± 0.04% (P〉0.05), respectively. All the results above showed that the down-regulated expression of fad2 had great effects on fatty acid composition and accumulation in rapeseed seeds, but had no significant effects on other seed quality traits, such as oil content, protein content, crude fiber content and glucosinolate content.
基金Supported by Natural Science Foundation of Hubei Province(2012FFC03101)~~
文摘[Objective] This study aimed to investigate the optimal component of culti- vation medium for container seedling raising of Camellia oleifera. [Method] In the application of container nursery technology of Camellia oleifera grafting in emergent stocks, yellow clay soil, surface soil of pine forest, decomposed edible fungus, peat soil, dung and dirt were mixed by different proportions into five formulae as nursery substrates, with garden soil as the control, in order to investigate the influences of various substrates on the growth of annual Camellia oleifera container seedlings by using randomized block design based on variance analysis and multiple comparisons, and to screen the optimal substrate formula for container nursery of Camellia oleifera. [Result] The influences of different substrates on the transplanting survival rate, seedling height, basal diameter, height-diameter ratio and lateral root length of Camellia oleifera container seedlings were significantly different. Various growth indi- cators of Camellia oleifera container seedlings cultivated in the substrate containing 40% of yellow clay soil + 15% of surface soil of pine forest + 20% of decomposed edible fungus + 20% of peat soil + 5% of dung and dirt exceeded that of the control and other substrate formulae, which could be used as the optimal substrate formula for the container nursery of Camellia oleifera. [Conclusion] This study screened the optimal substrate formula for the container nursery of Camellia oleifera, which provided technical reference for the cultivation of Camellia oleifera container seedlings.
基金Supported by the National Natural Science Foundation of China (50675202)
文摘A piston-cylinder apparatus was established to measure the solubility and diffusivity of air in dimethyl silicone oils and in hydraulic oils based on the PVT state equation of air and the solution of unsteady one-dimensional diffusion equation.The measured diffusivity-temperature relation can be well fitted by the Arrhenius equation for engineering applications.The correlation between the solute diffusivity D and solvent viscosity μ is examined.In terms of Eyring's activation theory,the activation in the air-silicone-oil diffusion process is quite different from that in the momentum transport of the silicone oil:the activation entropy of the former is positive while that of latter is negative.However,the activation enthalpies of the two processes are in the same order of magnitude,which leads to the observation that Dμ/T is roughly constant.
文摘[Objective] The paper aimed to determine the fatty acid components and contents,and measure the fractional protein and the amino acid components of Desi chickpea seeds.[Method] The oil of Desi chickpea seeds was extracted from their kernels collected from Xinjiang.The contents and components of fatty acids were tested by GC-MS.The fractional extraction was used to get the proteins of their kernels,and then the content of protein was tested.The amino acid compositions of the proteins were also analyzed.[Result] The fat content of chickpea seeds was as high as up to 18.2%,among which,the unsaturated fatty acids oleic acid and linoleic acid were the major component,accounting for 80% of the total fatty acids;the content of saturated fatty acid was low.The average content of protein was 23.71% in chickpea seeds.Globulin and albumin were the main protein in chickpea seeds,accounting for more than 80% of the total proteins,while glutelin and gliadin contents were low.All the proteins got from chickpea seeds belonged to complete protein,which contained 18 kinds of amino acids.The content of Glu was the highest(15.8%),and the content of Asp was 10.7%,followed by Arg(9.30%),Leu(7.56%),Lys(6.34%),Phe,Ala,Val and Ile.The contents of Trp,Met and Cys were the least.The chickpea seed was rich in essential amino acids.[Conclusion] The Desi chickpea was a legume crop containing high content of unsaturated fatty acids and rich in amino acids.
文摘The preparation of macauba fruits (Acrocomia aculeate (Jacq.) Lodd. ex Martius) both for oil extraction by continuous pressing and biodiesel production were investigated. The fruits and its pulp and kernel were characterized for their resulting oils. Experimental design was carried out to study the transesterification of each oil to obtain the concentrations of ethanol and catalyst that would provide the best biodiesel yield. A higher amount of biodiesel was produced from the best conditions to evaluate some characteristics as specified by ANP (National Agency of Petroleum, Natural Gas and Biofuels). The results showed a variation in the fruits composition and different characteristics presented by the pulp and kernel oil. It was possible to define technological steps to obtain oil from the fruits of macauba and find the optimal conditions to biodiesel production, concentration of catalyst 4.42% and 5% and 13.3:1 and 9:1 ethanol:oil molar ratio to kernel oil and pulp oil, respectively.
基金the Department of Science and Technology Management of PetroChina for providing financial support
文摘A new silica sol binder was obtained by mixing the acid-modified aluminium sulfate and water glass. The effect of SiO2 concentration in sodium silicate, pH value and polymerization was investigated. The new silica sol binder, which possessed abundant pore volume and suitable acid amount, was an ideal component for preparing cracking catalyst. As a result, the corresponding catalyst comprising the new binder showed excellent performance. Compared with the reference sample, the liquefied petroleum gas(LPG) and propylene yield obtained over this catalyst increased by 3.49 and 1.20 percentage points, respectively. The perfect pore structure and suitable Lewis acid amount of new silica sol were the possible reason leading to its outstanding performance.
文摘[Objective] The aim was to investigate the fatty acid and amino acid components of Agriophyllum squarrosum seeds from Xinjiang.[Method] The oil sample was extracted from kernels of A.squarrosum seeds collected from Xinjiang for measuring the components and contents of fatty acids with GC-MS;semi-micro Kjeldahl method and fractional extraction were conducted to get the proteins from the kernels and determine amino acids of the proteins.[Result] The fat content of A.squarrosum seeds was as high as up to 13.7%,among which unsaturated fatty acid and linoleic acid were the major components,accounting for more than 80% of the total fatty acids,while saturated fatty acid content was lower.The content of crude proteins was 24.37% in A.squarrosum seeds,in which globulin and albumin were the main components,accounting for more than 80% of the total proteins,while glutenin,gliadin and residue proteinswere less.Protein got from A.squarrosum seeds belonged to complete protein,contained 18 kinds of amino acids.The content of glutamic acid was the highest(18.3%),followed by arginine(9.46%),aspartate(9.27%),leucine(6.67%),phenylalanine(5.04%),serine,methionine,lysine,valine,cystine,histidine and tryptophane.In addition,A.squarrosum seed was rich in essential amino acid.[Conclusion] The paper will provide reference for comprehensive development of A.squarrosum resources from Xinjiang.
文摘Fatty acids' ethyl and methyl esters are not natural components of edible vegetable oils and therefore should not be present in virgin olive oils. Among the quality requirements for extra virgin olive oils, the International Olive Council (IOC) Norm, 2015 review, set limits for the ethyl ester content at ≤ 435 ppm for the 2014/2015 and 2015/2016 harvests and at ≤ 30 ppm for the 2016/2017 harvest. The purpose of this paper is to: (a) determine the alkyl ester content in two extra virgin olive oils (of the Arbequina and Coratina varieties) as parameters of quality at the moment of their elaboration and to assess the length of their shelf life, over a 12 month period at room temperature; (b) determine extra virgin olive oils' free alcohols content as these may esterify due to the free fatty acids present during storage. After 6 months of storage, the Arbequina oil's ethyl ester content was 32 ppm, and the Coratina's was 46 ppm. As a result, the shelf life for both was only about half a year (labeling usually indicates it must be consumed "before 1 year"). However, parameters related to oxidation (peroxide index, K 232, K 270 and AK) remained within the limits set by the International Olive Council (IOC) throughout the year. In conclusion: ethyl ester content is a very fine parameter for assessing the quality of extra virgin in an olive oil and determining the length of its shelf life.
文摘Low-temperature viscosity of lube oils mixed with paraffinic base oil and naphthenic base oil at different mass ratios has been tested by experiments. The influence of paraffinic base oil on the performance of naphthenic base oil was investigated by studying the low-temperature viscosity of tested oils. The viscosity of lube oils increased with an increasing content of high-viscosity paraffinic base oil in the oil mixture. And the low-temperature viscosity was less influenced when the content of paraffinic base oil in the mixture was insignificant. In order to reduce the cost for formulating lubricating oil, a small fraction of paraffinic base oil can be added into naphthenic base oil as far as the property of lubricating oil can meet the specification. According to the study on low-temperature viscosity of the oil mixed with paraffinic base oil and naphthenic base oil, a basic rule was worked out for the preparation of qualified lubricating oils.