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Articles 4231 - 4260 of 4798
Full-Text Articles in Food Biotechnology
Design Road Of Food Packaging Guided By Interactive Concept, Lin Haiyan
Design Road Of Food Packaging Guided By Interactive Concept, Lin Haiyan
Food and Machinery
Analyzed the current situation where food packaging in China tends to only visualization or only formalization seriously. Then, the interactive concept is applied to the origin and historical background of food packaging design, which demonstrates that the interactive concept promotes the creation and the development tendency to intelligent interaction of food packaging design. Further proves that the road to survive and develop of future food packaging is the people-oriented design focusing on user experiences guided by the interactive concept.
Effects Of Packing Ways On Logistics Preservation Quality Of Broccoli, Yan Kaiya, He Yezi, Zhang Min
Effects Of Packing Ways On Logistics Preservation Quality Of Broccoli, Yan Kaiya, He Yezi, Zhang Min
Food and Machinery
In order to reduce use level of coolant, effects of the coordination of coolant with ordinary polyethylene (polyethylene, PE) packing bag or micro-perforated PE packing bag on logistics preservation quality of broccoli were studied. Results revealed that regarding preservation quality of broccoli, foam boxes with 4 bags of coolant is better than that without coolant, while foam boxes coordinated of 2 bags of coolant and PE packing bag does better than that with 4 bags of coolant. Broccoli packed with 2 bags of coolant and micro-perforated packing bag has the highest quality among them. The results show that coordination of …
Effects Of Different Solvents On Extraction Of Phenolics From Oil-Tea Meal Under Hot Reflux And Ultrasonic Assistances, Chen Peiyun, Zhong Haiyan
Effects Of Different Solvents On Extraction Of Phenolics From Oil-Tea Meal Under Hot Reflux And Ultrasonic Assistances, Chen Peiyun, Zhong Haiyan
Food and Machinery
The effects of methanol, ethanol and acetone was investigated, on the extraction of phenolic contents and antioxidant activity from oil-tea meal under hot reflux and ultrasonic assistances. Under hot reflux and ultrasonic assistances, phenolic contents of acetone extracts were 1 444 ± 2 and 1 623 ± 1 mg GAE / 100 g (DW), respectively. that were significantly higher (P＜0.05) than the corresponding methanol and ethanol extracts. Phenolic compounds, including catechin, epicatechin, rutin and quercetin were determinate by HPLC in these extracts. Under hot reflux and ultrasonic assistances, the ORAC values of acetone extracts were 358.4 ± 16.9 and 370.6 …
Reducing The Potential For Acrylamide Formation In Wheat Products, Amy Hauver, P. Stephen Baenziger, Mary J. Guttieri
Reducing The Potential For Acrylamide Formation In Wheat Products, Amy Hauver, P. Stephen Baenziger, Mary J. Guttieri
UCARE: Research Products
Acrylamide, a chemical formed from free asparagine and reducing sugars during high-temperature cooking via the Maillard reaction (i.e. frying or baking) of high starch foods is deemed ‘probably carcinogenic to humans’ based on its affect in mice. In April of 2002, a group of Swedish researchers reported findings that presented evidence that heat-treated, starch-rich foods contained high levels of acrylamide, later linking the production of acrylamide to the Maillard reaction. A number of other studies have been done to link dietary intake of acrylamide to human cancers and other health effects, although many have had inconclusive results. Nevertheless, the World …
Toxicological Evaluation On Safety Of Hemp Seed Oil, Wei Yueyuan, Li Li
Toxicological Evaluation On Safety Of Hemp Seed Oil, Wei Yueyuan, Li Li
Food and Machinery
The acute toxicity test, genotoxicity and subchronic oral toxicity of hemp seed oil were investigated. Results indicated that LD50 from the acute toxicity test of mouse was higher than 40 mL/kg. The negative results were showed in Ames test, micronucleus test of bone marrow and sperm abnormality test. No significant differences were found in body weight, food efficiency and blood endpoint values between testing groups and control group. Furthermore, the values of serum biochemical endpoints separately fell into the ranges of their normal specific concentrations. An absence of histological changes in rat organs was observed. It is concluded that …
Isolation, Identification And Biological Characteristics Of A Bacteriocin-Producing Lactic Acid Bacteria Strain Isolated From Fermented Soybean Processing Wastewater, Yin Lebin, Zhang Chenfei, Sun Jing, Kong Xiaoting, Xia Qiuliang, Zhou Xinxing, Du Yan, Lai Han, Zhao Liangzhong
Isolation, Identification And Biological Characteristics Of A Bacteriocin-Producing Lactic Acid Bacteria Strain Isolated From Fermented Soybean Processing Wastewater, Yin Lebin, Zhang Chenfei, Sun Jing, Kong Xiaoting, Xia Qiuliang, Zhou Xinxing, Du Yan, Lai Han, Zhao Liangzhong
Food and Machinery
A bacteriocin-producing lactic acid bacteria strain designated as NLB-3 was isolated from natural fermentation broth of a soybean plant. By excluding the disturbances of organic acids and H2O2 to antibacterial activity of indicator bacteria, and after the fermentation broth protein stability analysis, the antibacterial substance was determined as bacteriocin. On the basis of the colonies, cells morphology, dissolved calcium circle, physiological and biochemical characteristics, strain NLB-3 was preliminary identified as Lactobacillus sp.. The biological characteristics of strain NLB-3 showed that, its optimum growth temperature was at 35 ℃, after 16 hours fermentation, the pH value reached 3.45 …
Analysis Of Fatty Acids Component And Distribution In Sn-2 In Oils From Different Camellia Spp., Feng Na, Zhong Haiyan, Zhou Bo, Zhong Jinjing, Ma Li, Yu Jiao
Analysis Of Fatty Acids Component And Distribution In Sn-2 In Oils From Different Camellia Spp., Feng Na, Zhong Haiyan, Zhou Bo, Zhong Jinjing, Ma Li, Yu Jiao
Food and Machinery
The contents of fatty acids in nine different oils of Camellia spp.wereanalyzed by GC using methyl pentadecanoate as the internal standard. The triglycerides were specially hydrolyzed by the use of pancreatic lipase, 2-monoglyceride was isolated by thin-layer chromatography and then was analyzedby gas chromatography. The results showed that five kinds of fatty acids presented in tested samples of which were palmitic acid, stearic acid, oleic acid, linoleic aicd and linolenic acid. Contents of oleic acid and unsaturated fatty acids in Camellia chekiangoleosawere the highest with 82.79 and 84.77 g/100 g, respectively. The fatty acids in Sn-2 were mainly oleic acid …
Relevance Features Of Rice Protein And Its Components To Physical And Sensory Properties Of Cooked Rice, Wang Pengyue, Shen Qingxia, Lu Xinghua, Pang Linjiang, Chen Zhongxiu
Relevance Features Of Rice Protein And Its Components To Physical And Sensory Properties Of Cooked Rice, Wang Pengyue, Shen Qingxia, Lu Xinghua, Pang Linjiang, Chen Zhongxiu
Food and Machinery
Taking the rice both with similar amylose and different protein contents as the research materials, the relevant characteristics of rice protein and protein component (PC) to physical property and sensory quality were studied. The results showed that the crude protein content of cooked rice changed little, and each PC content decreased to different degrees, in which a substantial reduction in albumin, and globulin changes little. And the rice glutelin content have a significant positive correlation with the total contents of protein components (TCPC) of rice, reduced percentage of glutelin content and TCPC in cooked rice. Most cooked rice physical parameters …
Comparison Of Nutritional And Functional Components In 6 Kinds Of Naked Oat, Li Xiaorui, Liu Shan, Wang Shixia, Yao Yang, Ren Guixing, Qi Wentao
Comparison Of Nutritional And Functional Components In 6 Kinds Of Naked Oat, Li Xiaorui, Liu Shan, Wang Shixia, Yao Yang, Ren Guixing, Qi Wentao
Food and Machinery
The components of basic nutritional、functional active and characteristic ingredients in six representative naked oats were detected and compared. The results showed that, the total starch had the highest variation coefficient of 8.21% among all the 6 selected samples, and the amplitude of variation ranged from 51.50% to 64.32%. The contents of slowly digestible and resistant starch of Ba-you 3 and Hua-zao 2 in total starch were relatively high. The variation coefficient of rude fat was 26.29%, ranged from 3.13% to 7.75%. The proportion of unsaturated fatty acids of Ding-you-8 in total fatty acid was 84.00%, which was the highest, and …
Pasting And Gel Properties Of Hulless Barley Starch, Lu Yuandi, Chang Yaning, Dai Wei, Nie Jiarui
Pasting And Gel Properties Of Hulless Barley Starch, Lu Yuandi, Chang Yaning, Dai Wei, Nie Jiarui
Food and Machinery
The pasting properties of starch from hulless barley were analyzed and compared with those of starches from buckwheat and wheat. Effects of different media (sucrose, NaCl and pH) on pasting was studied. The texture and stability of gels were analyzed. Chemical composition, granule structure, relative crystallinity and transparency of the starches were investigated. The results indicated that highland barley starch (HBS) granule is large, flat oval with A type crystal pattern and crystallinity of 26.7%. The pasting stability was increased with the addition of NaCl and retrogradation had been suppressed greatly. While little effects of sucrose and pH (3～11) on …
Application Of Maillard Reaction To Improve The Quality Of Tobacco Sheets, Zhang Peng, Yu Jingyang, Long Zhangde, Li Zhihua, Zhang Xiaoming
Application Of Maillard Reaction To Improve The Quality Of Tobacco Sheets, Zhang Peng, Yu Jingyang, Long Zhangde, Li Zhihua, Zhang Xiaoming
Food and Machinery
According to the principles，the influences of conditions of the maillard reaction, such as reaction time and ratios of exogenous amino acids to sugars, on the improving effects of tobacco sheets were evaluated. The results showed that when the initial pH being 7.0～8.0 and thermal reaction temperature of 70 ℃, the optimum conditions for maillard reaction of extracts were as follows: reaction time of 13h, and the ratios of exogenous amino acids to carbohydrates being Pro︰Gly︰Phe︰Cys︰peptides︰fructose as 13︰13︰13︰2︰0.3︰70. GC—MS was used to analyze the main flavor components of the reaction mixture, and the tobacco sheet samples were sensory evaluated by professionally …
Research On Texture Properties Of Low-Methoxyl Pectin Gel, Hu Wenyue, Shan Yang, Li Gaoyang, Fu Fuhua, Li Qili
Research On Texture Properties Of Low-Methoxyl Pectin Gel, Hu Wenyue, Shan Yang, Li Gaoyang, Fu Fuhua, Li Qili
Food and Machinery
Taking low-methoxyl pectin and low-methoxyl amidated pectin as research objects, hardness and springiness as measurement index, this study aimed to investigate the effects of pectin concentration, sucrose concentration, calcium concentration and pH value on the texture properties of pectin gel. Through single factor experiment, it could be concluded that the texture properties of low-methoxyl amidated pectin gel was better than the ordinary low-methoxyl pectin. The orthogonal test showed that the optimum condition for low-methoxyl amidated pectin gel were as follows: concentration of pectin was 1.3 g/100 mL, concentration of sucrose was 20 g/100 mL, concentration of calcium was 35 mg/g …
Uptake And Distribution Of Pb And Cd By Hybrid Rice In Soils, Wang Jingyun, L Ijuan
Uptake And Distribution Of Pb And Cd By Hybrid Rice In Soils, Wang Jingyun, L Ijuan
Food and Machinery
In Jingxing village, Changsha city, soil samples and their respective hybrid rice samples were collected. Based on the content of Pb and Cd in the soils and hybrid rice, whether put in lime before heading had an effect on the accumulation and distribution of Pb and Cd was analyzed. The results showed that, in the common red soil, 94.20% of Pb was distributed in root, only 54.00% of Cd was distributed in root. In red soil with lime, the total distribution of Pb and Cd in root, stem and leaf were increased 2.20% and 17.20%, but the distribution decreased by …
Preparation And Modification Of Magnetic Nanobeads With Promised Biological Applications, Hu Qiongcan, Ning Jingheng, Liu Zhenguo, Zhang Weifeng, Liu Long, Wang Jianhui
Preparation And Modification Of Magnetic Nanobeads With Promised Biological Applications, Hu Qiongcan, Ning Jingheng, Liu Zhenguo, Zhang Weifeng, Liu Long, Wang Jianhui
Food and Machinery
Magnetic nanobeads are more and more widely used in the fields of biology and medicine. However, there are still some shortcomings about the magnetic nanobeads such as nonuniform size, poor dispersity, weak magnetism and low functionalization degree after modification. This study was focused on how to acquire magnetic nanobeads by overcoming these drawbacks. Firstly, a highly magnetic nucleus with homogenous sizes, Fe3O4, was prepared. Then, it was successively modified by tetraethoxysilane and 3-aminopropyltriethoxysilane, giving functionalized magnetic nanobeads Fe3O4@SiO2 or Fe3O4@SiO2—NH2, respectively. The influence …
Assessment On Joint Toxicity Of Heavy Metals In Agricultural Products Based On Luminescent Bacteria Method, Liu Xia, He Zao, Hu Yuxin, Zheng Shu, Luo Fang
Assessment On Joint Toxicity Of Heavy Metals In Agricultural Products Based On Luminescent Bacteria Method, Liu Xia, He Zao, Hu Yuxin, Zheng Shu, Luo Fang
Food and Machinery
Toxic of Pb2+, Cd2+, Hg2+, Pb2++Cd2+, Cd2++Hg2+, Pb2++Hg2+ and Pb2++Cd2++Hg2+ were investigated using luminescent bacteria test. The joint toxicities of heavy metals mixtures were assessed by toxic unit method and additive index method. Results showed that the joint toxicity of Pb2+ with Cd2+ was synergetic in action while the joint toxicities of Cd2+with Hg2+, Pb2+ with Hg2+, and Pb2+ with Cd2+, Hg2+were antagonistic.
Determination Of Streptomycin Residue By In Tomatoes By Synchronous Fluorescence Of Cdte Quantum Dots, Mao Yongqiang, Hu Meina, Li Na, Zhang Dan, Mao Jing
Determination Of Streptomycin Residue By In Tomatoes By Synchronous Fluorescence Of Cdte Quantum Dots, Mao Yongqiang, Hu Meina, Li Na, Zhang Dan, Mao Jing
Food and Machinery
Thioglycolic acid capped CdTe quantum dots (QDs) was prepared via hydrothermal synthesis method. Based on the synchronous fluorescence enhancement of CdTe QDs in the presence of streptomycin, a synchronous fluorescence method for the determination of streptomycin residue was established. Influence factors including pH value of buffer solution, concentration of CdTe QDs and reaction time were investigated. The samples were extracted with methanol by ultrasonic processing, and were added into the solution which was composed of 1.0 mL of CdTe quantum dots (3.5×10-5 mol/L) and 1.0 mL of Tris—HCl buffer solution (pH=6.0). After standing for 10 min, the synchronous fluorescence …
On-Line Detection Of Sugar Content Of Nanshui Pears By Vis/Nir Spectroscopy And Variable Selection Methods, Sun Tong, Jiang Shuiquan
On-Line Detection Of Sugar Content Of Nanshui Pears By Vis/Nir Spectroscopy And Variable Selection Methods, Sun Tong, Jiang Shuiquan
Food and Machinery
Sugar content (SC) is one of the important internal qualities of Nanshui pears. In this research, Visible/near infrared (Vis/NIR) spectroscopy was used to detect SC of Nanshui pears on-line. Transmission speed of Nanshui pears was 0.3 m/s, and USB4000 spectrometer was used to acquire the spectra of Nanshui pear samples in the wavelength range of 470～1 150 nm. Then three variable selection methods were used to select sensitive wavelength variables, and partial least squares (PLS) was used to develop calibration models of SC for Nanshui pears, also performance of calibration models was compared. The results indicate that Vis/NIR spectroscopy combined …
Determination Of Sugars And Polyols In Domestic And Imported Cigarette Brands With High Performance Liquid Chromatography, Guo Lei, Su Jiakun, Luo Juanmin, Xu Da, Shao Dengyin, Song Shiqing, Fan Linghui, Lu Huijun
Determination Of Sugars And Polyols In Domestic And Imported Cigarette Brands With High Performance Liquid Chromatography, Guo Lei, Su Jiakun, Luo Juanmin, Xu Da, Shao Dengyin, Song Shiqing, Fan Linghui, Lu Huijun
Food and Machinery
High performance liquid hromatography (HPLC) was developed to detect fructose, glucose, maltose, sucrose, glycerol, propylene glycol and sorbitol in tobacco. Samples were separated in Hi-Plex Ca cation ion exchange column with ultra pure water as mobile phase, refractive index detector as detector, and injection volume 15 μL, velocity of 0.4 mL/min, column temperature 80 ℃. The results show that the recoveries of sugars and polyols ranged from 97% to 108% with RSD of 0.89%～1.39% in the limit of detection of 1.5～2.0 mg/L. Meanwhile. Thirteen domestic and imported cigarette brands were analyzed by using this method. Results indicate that the propylene …
A Comparative Research On Detection Methods Of Procyanidins From Chestnut Shells, Wei Qin
A Comparative Research On Detection Methods Of Procyanidins From Chestnut Shells, Wei Qin
Food and Machinery
Determining the content of procyanidins from chestnut shells respectively with two kinds of methods. The average purity of purified product was 74.78% (RSD=0.99%) by using HPLC. Firstly optimizing molysite catalytic chromogenic condition of colorimetry to determine the colorimetric optimization of procyanidins from chestnut shells (CSPCs) by colorimetry with ferric ions as catalysis agent, on the basis of single-factor experiments, an orthogonal experimental design was employed, with Absorbance of extract as an index, to optimize four factors. The optimum colorimetric conditions were Fe3+ concentration of 0.01 g/mL, reaction time of 40 min, reaction temperature of 100 ℃, butanol-hydrochloric acid volume …
Optimization Of Extraction Process For Hs—Spme In Gc—Ms Of Volatile Compounds In Flavor Pickle Goose, Zhou Hengliang, Hu Yujiao, Li Cheng, Liu Aiping
Optimization Of Extraction Process For Hs—Spme In Gc—Ms Of Volatile Compounds In Flavor Pickle Goose, Zhou Hengliang, Hu Yujiao, Li Cheng, Liu Aiping
Food and Machinery
The optimal extraction fiber was selected by comparing the extraction effect of different extraction fiber. Under this condition, response surface methodology was employed to optimize HS—SPME extraction conditions for volatile components in flavor pickle goose. The effects of extraction temperature, extraction time and desorption time on the total of peak area and the total number of volatile substances. The volatile compounds in flavor pickle goose were determined through SPME—GC—MS. Results indicated that the optimal extraction conditions of flavor pickle goose was obtained as follows: extraction fiber 75 μm CAR/PDMS, extraction temperature 55 ℃, extraction time 53 min, desorption time 4 …
Optimizationon Determination Conditions For Aromatic Components Of Sichuan Xiaoqu Chinese Spirit, Wu Hechuan, Zhou Jian, Zhang Suyi, Ma Yingying, Yang Jiangang
Optimizationon Determination Conditions For Aromatic Components Of Sichuan Xiaoqu Chinese Spirit, Wu Hechuan, Zhou Jian, Zhang Suyi, Ma Yingying, Yang Jiangang
Food and Machinery
Headspace solid-phase microextraction (HS—SPME) and gas chromatography coupled with mass spectrometry (GC—MS) were used for the qualitative determination of aromatic components in Sichuan Xiaoqu Chinese spirit samples. The effect factors of HS—SPME were optimized, such as alcohol content in sample，sample volume in headspace glass vial, concentrations of sodium chloride, equilibrium temperature and time, desorption time. The best extraction performance was achieved under the following conditions: 20% vol alcohol content in sample，45% sample volume in headspace glass vial with addition of 0.1 g/mL sodium chloride, 30min equilibrium time at 45 ℃, 30 min headspace adsorption time. In this condition, there were …
Determination Of Bisphenol A In Canned Food By Hplc Method, Dai Huanhuan
Determination Of Bisphenol A In Canned Food By Hplc Method, Dai Huanhuan
Food and Machinery
The hollow fiber liquid phase microextraction high performance liquid chromatography (HF—LPME—HPLC) of bisphenol A in canned food were determined to establish a simple, fast and accurate detection method. Mainly use the two-phase hollow fiber (HF) of liquid phase microextraction (LPME) technology, combined with high performance liquid chromatography to the determination of bisphenol A (BPA) content, so as to realize the optimization of the extractant, sample solution pH, extraction temperature, extraction time and stirring rate and other basic data parameters optimization,The results of the study show that: to octanol as the extractant, the selection of the determination of food sample solution …
Accumulation And Migration Regularity Of Heavy Metals In Plankton And Aristichthys Nobilis, Lu Weiya, Li Jie, Xue Minmin, Yang Mengxin, Liu Jiayu
Accumulation And Migration Regularity Of Heavy Metals In Plankton And Aristichthys Nobilis, Lu Weiya, Li Jie, Xue Minmin, Yang Mengxin, Liu Jiayu
Food and Machinery
Development of mineral resources along Xiang River has brought serious pollution of heavy metals. What’s more, heavy metals migrate from environment into organism which bring a consequence of security threat. Studied the pollution situation and migration regularity of 7 kinds of heavy metals in water,sediment,plankton and aristichthys nobilis. The results showed that: The concentration of heavy metals in water were below the first class standard limit value of the national surface water environment quality; The pollution degree of heavy metals in sediments were found with the order: Cd>Zn>Pb>Cu>Cr>As>Hg, and the comprehensive pollution grading had …
Design Ideas Andanalysis On Application Prospects Of Potato Starch Processing Machine, Li Shuhua, Wang Kai, Yan Zehua
Design Ideas Andanalysis On Application Prospects Of Potato Starch Processing Machine, Li Shuhua, Wang Kai, Yan Zehua
Food and Machinery
In this paper, analyzes the status quo of China's potato starch processing, in view of potato planting more dispersed and intolerance storage features, a machine design ideas was put for small potato starch processing, to avoid the traditional potato starch factory wastewater concentration of waste pollution problem, and its application prospect was analyzed.
Design Of Egg Fruit Automatic Processing Device Based On Principle Of Servo, Zhang Zhi, Wang Yumo, Zhang Yan, Ren Xibao
Design Of Egg Fruit Automatic Processing Device Based On Principle Of Servo, Zhang Zhi, Wang Yumo, Zhang Yan, Ren Xibao
Food and Machinery
Based on the principle of servo, an egg fruit automatic processing device with theoretical computational analysis and structure overall design was designed, . Experimental studies showed that egg fruit automatic processing device,based on the principle of servo, could process fresh fruit 1.1 t averagely per hour, and its obtaining rate of juice reached 28%. Juice, with high quality and purity, presented little foreign flavor. Rate of peel collection was up to 97%, and 26% energy consumption lower than that of P6G-300 type machine. It also obtained self-adaptive ability, thus could separate out juices of high quality in a rapid speed, …
Design Of Rubber Fruit Sheller, Zhao Hua, Wang Tao, He Zhuoliang
Design Of Rubber Fruit Sheller, Zhao Hua, Wang Tao, He Zhuoliang
Food and Machinery
In order to realize the mechanized shelling operation and improve the shelling efficiency in rubber fruit processing, a sheller mechine was developed. The shelling principle of the proposed mechanism is based on the ripping and rubbing effects produced by the compression and shearing action together. The shelling unit comprises cutting means, pressing means and separating means. The rubber fruit to be shelled fall into the cutting unit by gravity and are shelled by cutting and squeezing action. The shelled kernels and the broken shell drop to the separating means to be separated. The shelling machine is simple, easy to operate …
Establishment Of Model On Growth/No Growth Boundary Of Staphylococcus Aureus Based For Three Factors, Zhao Xueguang, Li Xueying, Yang Xianshi
Establishment Of Model On Growth/No Growth Boundary Of Staphylococcus Aureus Based For Three Factors, Zhao Xueguang, Li Xueying, Yang Xianshi
Food and Machinery
Establishes growth/no growth model of Staphylococcus aureus in the factors of temperature, pH and salt concentration, by R, a software for statistical analysis. The P value was obtained by the model for model parameter values were below 0.01, so reached highly significant. When the temperature at 10 ℃ to 25 ℃, the pH at 4.5 to 5.5, the Sodium chloride salt concentration from 0.5% to 14.5%, each single factor’s effect on Staphylococcus aureus’ growth/no growth was significant, and three factors affected collaborative in other selected range of values.
A Comparative Study On Quality Of Green Radish Treated By Pe Film And Micro-Perforated Film At Cold Storage, Wu Haiqing, Zhen Runying, He Xinyi, Sun Guibao
A Comparative Study On Quality Of Green Radish Treated By Pe Film And Micro-Perforated Film At Cold Storage, Wu Haiqing, Zhen Runying, He Xinyi, Sun Guibao
Food and Machinery
In order to investigate the effect of the packing materials on the storage quality of green radish, the main physical physics and chemistry indicators and sensory indexes of Weiqing radish were compared at (2.0±0.5) ℃, which treated by the polyethylene film (PE) and micro-perforated film. The results showed that, the contents of vitamin C, acidity, soluble solids content and weight loss rate of the treated by micro-perforated film were higher than those of the PE film group. The amylase activity, contents of reducing sugar and nitrite in the treatment of PE film were higher than those in micro-perforated group. The …
Preparation And Properties Of Chitosan/Paraben Composite Films, Liu Jing, Hu Changying, Zeng Shaofu
Preparation And Properties Of Chitosan/Paraben Composite Films, Liu Jing, Hu Changying, Zeng Shaofu
Food and Machinery
The influence of different concentration of paraben on properties of chitosan/paraben composite films was studied. The structure characterizations of films were characterized by FT-IR and SEM. Transmittance, color, mechanical properties, water vapor permeability, swelling degree and antibacterial properties were also tested. Results: with the increasing of concentration of paraben, the transmittance of composite film decreased and the color became yellow. The highest tensile strength was 37.0 MPa, and the elongation at the break was 55% when the concentration of paraben were 5%(WT) and 25%(WT), respectively. The water vapor permeability was 7.5×10-14 g/(m2·s·Pa) when concentration of paraben was …
Study On Dynamics Of Atp-Related Compounds And Freshness Of Grass Carp Muscles Of During Storage, Ouyang Fangfang, Wang Jianhui, Chen Qi, Wang Faxiang, Li Xianghong, Y Ujian, Liu Yongle
Study On Dynamics Of Atp-Related Compounds And Freshness Of Grass Carp Muscles Of During Storage, Ouyang Fangfang, Wang Jianhui, Chen Qi, Wang Faxiang, Li Xianghong, Y Ujian, Liu Yongle
Food and Machinery
In order to clarify the relationship between muscle quality and ATP-related compounds of grass carp muscle chilled storaged at 4 ℃, ATP-related compounds of grass carp muscle was investigated using high -performance liquid chromatography (HPLC), and K value was calculated. The results showed that the variation tendency of ATP-related compounds of dorsal and abdominal muscle in grass carp was similar during chilled storage. IMP contents were increased at first and then decreased. Hx and HxR contents increased continuously. K values of dorsal and abdominal muscle of fresh grass carp were 7.72% and 7.78%. The fish began to decay when K …