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Articles 120001 - 120030 of 255947

Full-Text Articles in Life Sciences

Modeling And Dynamic Simulation Ofautomatic Apple Oriented Mechanism, Ma Yao, Yu Jinghu Nov 2016

Modeling And Dynamic Simulation Ofautomatic Apple Oriented Mechanism, Ma Yao, Yu Jinghu

Food and Machinery

It’s difficult to distinguish between apple damage and fruit axis and calyx in image processing. This results in poor efficiency and accuracy. An apple orientation mechanism is designed, and realized orientation of apple before image acquisition, thereby reducing image processing time. It mainly includes fruit pan, synchronous wheel, fixed caster and drive shaft. ADAMS was used to simulate the orientation process of apple, which verified the feasibility of the mechanism, and sure that the apple will not scratched in the orientation process. In order to improve the efficiency of apple sorting system, the optimal scheme was obtained by simulating the …

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Tea Frying Temperature Control System Based On Fuzzy Expert Control, Pan Yucheng, Lin Gaofei, Chen Xiaoli, Huang Xianzhou Nov 2016

Tea Frying Temperature Control System Based On Fuzzy Expert Control, Pan Yucheng, Lin Gaofei, Chen Xiaoli, Huang Xianzhou

Food and Machinery

Tea frying temperature has a great influence on the quality of tea.To cope with the disadvantages of the existing tea-leaf parcher temperature control system with temperature control of low precision and the longtime adjusting, the tea-leaf parcher with intelligent temperature control system we designed， which is suitable for frying high-end quality famous tea. System used AT89S52 single chip as the core, the platinum thermal thermistor as the temperature sensor and linearized the output signal of unbalanced bridge by means of current transmitter XTR106 and designed a kind of fuzzy expert controller combine with the fuzzy control theory and expert system. …

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Optimization On Nc Machining Simulation And Machining Processing Route Based On Vericut, Deng Yi, Ding Ke, Fu Hong, Ma Guijun Nov 2016

Optimization On Nc Machining Simulation And Machining Processing Route Based On Vericut, Deng Yi, Ding Ke, Fu Hong, Ma Guijun

Food and Machinery

VERICUT is one kind of 3D software, which can not only carry on the virtual machining, but also optimize the cutting tool. The VERICUT processing simulation and tool path were optimized for trademark logo mold parts with inspection procedure process, and may produce collision and cut, improve tool route, reduce unneces-sary tool time. The processing simulation and the optimization of the process were showed in VERICUT environment.

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Optimal Design For Bidirectural Cramp Frame Based On Triz Theory, Du Chunkuan Nov 2016

Optimal Design For Bidirectural Cramp Frame Based On Triz Theory, Du Chunkuan

Food and Machinery

It was well known that standard cramp frame can only clamp a group of workpieces, without the ability to catch many groups of workpieces with related position constraint. To solve this problem, a design solution based on TRIZ theory as well as an inventive principle were proposed in this study. A bidirectural cramp frame with hyperbolic structure was designed, and it could clamp workpieces on both sides. Therefore, the application range and fields of this new kind cramp frame were expanded. Moreover, the bidirectural cramp frame was also analyzed and optimized using the finite element method. Finally, simulation results showed …

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Effect Of Core Browning And Storage Fresh-Keeping On Huangguan Pear By Low-Power Microwave Treatment, Guo Yanming, Dong Ming, Zhang Linyu, Wu Xiaocong, Zhang Shuyuan, Jin Wenping Nov 2016

Effect Of Core Browning And Storage Fresh-Keeping On Huangguan Pear By Low-Power Microwave Treatment, Guo Yanming, Dong Ming, Zhang Linyu, Wu Xiaocong, Zhang Shuyuan, Jin Wenping

Food and Machinery

With a low-power microwave treatment on Huangguan pear fruits, different levels of low-power microwave treatment on fruit storage quality and the influence of the core browning were studied. Through the determinations of total phenols, polyphenol oxidase (PPO), malondialdehyde (MDA), DPPH in Huangguan pear core and ethylene, respiration intensity, hardness in storage period, the optimal treating conditions were gotten. Under the condition of 0～2 ℃ refrigerating, compared with the control group, the low energy microwave treatment group could keep the fruits of high hardness, delay the reduce of soluble solids, reduce the respiration intensity of fruit, and delay the ethylene peak …

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Study On The Preserving-Green Technology Of Quick-Frozen ‘Sally’ Komatsuna In Processing, Frozen Storage And Transportation, Cheng Xihong, Zhu Dongxing, Wu Lei, Huang Youru, Zhong Wei, Qi Bin Nov 2016

Study On The Preserving-Green Technology Of Quick-Frozen ‘Sally’ Komatsuna In Processing, Frozen Storage And Transportation, Cheng Xihong, Zhu Dongxing, Wu Lei, Huang Youru, Zhong Wei, Qi Bin

Food and Machinery

To investigate the optimal preserving green measures for export komatsuna during processing, frozen storage and transportation, the ‘Sally’ komatsuna was blanched by the blanching complex solution before quick-freezing process. The preserving green effects of sodium bicarbonate and sodium chloride concentrations in the blanching complex solution, blanching temperature and time were determined as a single factor during frozen pack storage, respectively. Moreover, blanching conditions were also optimized by orthogonal experiment. The results showed that the best preserving-green technology for the export ‘Sally’ komatsuna in processing and frozen storage was blanching them with 0.10% sodium bicarbonate and 0.10% sodium chloride concentrations at …

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Simultaneous Detection Of Puffiness And Soluble Solids Content For Intact Citrus By Online Spectroscopy, Liu Yande, Wu Mingming, Sun Xudong, Zhu Danning Nov 2016

Simultaneous Detection Of Puffiness And Soluble Solids Content For Intact Citrus By Online Spectroscopy, Liu Yande, Wu Mingming, Sun Xudong, Zhu Danning

Food and Machinery

Puffy fruit and soluble solid content (SSC) are important indexes for evaluating the quality of citrus. The feasibility was discussed for detecting Puffing disease and SSC of intact citrus simultaneously by online visible-near infrared (visible-NIR) transmittance spectroscopy. The spectra were recorded with the integration time of 100 ms in the wavelength range of 350~1 150 nm when the samples were conveyed at the speed of five samples per second. The feasibility of simultaneous and online detection of puffiness fruit and SSC for intact citrus simultaneously was discussed by visible-near infrared transmittance spectroscopy. The response properties of visible-NIR spectra for normal …

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Study On Extraction Of Essential Oil From Lysimachia Foenum-Graecum Hance And Its Preservation Effect On Longan, Yan Xuyu, Li Ling, Chen Ting, Wu Yuanjiao Nov 2016

Study On Extraction Of Essential Oil From Lysimachia Foenum-Graecum Hance And Its Preservation Effect On Longan, Yan Xuyu, Li Ling, Chen Ting, Wu Yuanjiao

Food and Machinery

Essential oil was extracted from Lysimachia foenum-graecum Hance using steam distillation method. The extraction conditions of essential oil were optimized by orthogonal experimental design, and its preservation on longan was studied. The results showed that the optimum extraction technology were: the concentration of sodium chloride 4%, the distilling time was 6 h, and the solid-liquid ratio of 1∶10 (g/mL). Under the condition, the extraction rate of essential oil reached 0.167 2%. The preservation results indicated: the antibacterial effects of 4 treatments, the content of Vitamin C and soluble solid decreased gradually, and weight loss and corruption rate of longan increased …

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Detection Of Potato External Quality Based On Hyperspectral Technology, Deng Jianmeng, Wang Hongjun, Li Zouzou, Li Yuanhong Nov 2016

Detection Of Potato External Quality Based On Hyperspectral Technology, Deng Jianmeng, Wang Hongjun, Li Zouzou, Li Yuanhong

Food and Machinery

In order to detect the external quality of potato quickly, the hyperspectral imaging technology was used. Potato with germination and other three kinds of common defects were studied. The partial least-squares discriminant model were built after different pretreatment methods for spectral data processing. The results showed that pretreatment method of SNV was the best. 13 and 9 feature bands were selected after using successive projections algorithm (SPA) and weighted weight method (WWM) for spectral data preprocessed. The support vector machine (SVM) discriminant model were established for both SPA and WWM. Our results also showed that the two methods to predict …

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Effect Of Handling Cattle In Different Platform Slope On Beef Quality, Guo Bing, Wang Haifeng Nov 2016

Effect Of Handling Cattle In Different Platform Slope On Beef Quality, Guo Bing, Wang Haifeng

Food and Machinery

In order to investigate the beef quality changes under handling cattle in different platform slope, Twenty simon tal beef cattle were randomly divided into 4 groups, the cow is respectively loading and unloading through (30,40,50 °) slope, then cattle are slaughtered. The pH value, flesh-colored, drip loss percentage, cooking loss percentage and shear force of postmortem beef were measured respectively. Results showed, with the increase of loading platform slope, pH values, L* value and a* value of postmortem beef significantly decreased (P<0.05), while shear force, b* value, drip loss and cooking loss of postmortem beef significantly increased (P<0.05). This study indicated that beef quality was better through handling cattle in 30 degrees platform slope, and it should be reduced platform slope in cattle actual production thereby improve beef quality.

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Effect Of Hemp Seed And Algae Oils Preparation On Blood Lipid-Lowering And Antioxidant Activities For Mixed Hyperlipidemia Rats, Bai Chuanming, Li Li Nov 2016

Effect Of Hemp Seed And Algae Oils Preparation On Blood Lipid-Lowering And Antioxidant Activities For Mixed Hyperlipidemia Rats, Bai Chuanming, Li Li

Food and Machinery

Objective: The effects of hemp seed and algae oils preparation on blood lipid-lowering and antioxidant activity of mixed hyperlipidemia rats were investigated in this study. 50 rats were randomly divided into 5 groups, i.e., the blank control group, model control group, hemp seed oil and algal oil preparation low dose group (170 mg/kg), medium dose group (340 mg/kg) and high dose group (510 mg/kg). Then their weights of , testis fat pad and perirenal fat pad, fat body ratio, and the activities of malondialdehyde (MDA), glutathione (GSH) and superoxide dismutase (SOD) were measured after feeding high fat diet and corresponding …

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Optimization On Ultra High Pressure Extraction Process Of Mussel Polysaccharide Based Artificial Neural Network, Zhang Bin, Sun Lanping, Shi Ying, Tu Kang Nov 2016

Optimization On Ultra High Pressure Extraction Process Of Mussel Polysaccharide Based Artificial Neural Network, Zhang Bin, Sun Lanping, Shi Ying, Tu Kang

Food and Machinery

Based on the raw materials of mussel meat after taking out the pearl, ultra high pressure is used to extract mussel polysaccharide. The response surface experimental design was used to get the training samples for the neutral network, while the sophisticated neutral network was used for training and stimulating, analyzing extraction factors (pressure strength, solid- liquid ratio and pressure holding time), the interaction between the factors that affected the extraction rate of mussel polysaccharide, and optimizing the ultra high pressure extraction process of mussel polysaccharide. The results showed that artificial neutral network optimization was more accurate than response surface method …

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Purification Of Total Polyphenols In Polygonum Capitation By Macroporous Adsorption Resins, Li Xiaobin, Gu Manqi, Zheng Kuiling, Wei Gang, Liao Liling Nov 2016

Purification Of Total Polyphenols In Polygonum Capitation By Macroporous Adsorption Resins, Li Xiaobin, Gu Manqi, Zheng Kuiling, Wei Gang, Liao Liling

Food and Machinery

The total content of polyphenols in polygonum captitatum was determined by Folin-Cioculteu colorimetry. 10 types of macroporous resins were tested by static adsorption and desorption experiments for purifying polyphenols in polygogum captitatum and purifying conditions by the best resin were investigated. The results showed that HPD-722 was the best resin. Purifying conditions were as follows: concentration of adcorption sample 2.0～4.5 mg/mL, 2 BV/h adsoption velocity, 7.5 BV 50% ethanol solution as eluent, the content of the total polyphenol sample was up to 59.02%.

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Optimization Ofcorn Steep Liquor Medium For Trehalose Synthase Gene Engineering Bacteria By Response Surface Methodology, Jiang Bo, Xie Ding, Zheng Ruina, Yang Qianyuan, Xie Yanping, Sheng Ming Nov 2016

Optimization Ofcorn Steep Liquor Medium For Trehalose Synthase Gene Engineering Bacteria By Response Surface Methodology, Jiang Bo, Xie Ding, Zheng Ruina, Yang Qianyuan, Xie Yanping, Sheng Ming

Food and Machinery

Corn steep liquor was used as the sole carbon and nitrogen source for recombinant E. coli culture medium. Based on the single factor optimization, three factors of corn steep liquor, MgSO4 and trace elements were chosen to design the response surface of corn steep liquor medium components. With Box-Behnhen experimental design and response surface analysis, the optimum components of corn steep liquor medium were determined. The results showed that the optimum medium components were 26 g/L for corn steep liquor, 2.1 g/L for MgSO4 and 7 mL/L for trace elements. Under these conditions, the activity of trehalose synthase …

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Research Advance On Antioxidant Active Composition And Antioxidant Mechanisms Of Edible Fungi, Xiao Xingning, Yuan Ya, Liao Xia, Wang Liying, Shi Fang, Ming Jian Nov 2016

Research Advance On Antioxidant Active Composition And Antioxidant Mechanisms Of Edible Fungi, Xiao Xingning, Yuan Ya, Liao Xia, Wang Liying, Shi Fang, Ming Jian

Food and Machinery

Edible fungi are tasty as well as full of all kinds of biological activity, and the antioxidation is one of the most important activities among them. Polysaccharides, polyphenols, terpenoids,and selenium are the major antioxidants of edible fungi. In this paper, it was reviewed the research advance of antioxidant substances and the antioxidant mechanism of edible fungi, and the future research direction was also summarized, aiming to develop and utilize edible and medicinal values of the polysaccharides in the futher, and improve its application in the fields of food and medicine.

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Research And Development Of Functional Properties In Pueraria, Liang Jie, Li Lin, Tang Hanjun Nov 2016

Research And Development Of Functional Properties In Pueraria, Liang Jie, Li Lin, Tang Hanjun

Food and Machinery

Summarized the functional properties and application of pueraria in the food industry, and analyzed the exploitation, research and problems of the kudzu as a dry crop resource. It was helpful for high efficiency development and level improvement in technology and industry development of pueraria application.

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Effects Of Extraction Methods On The Biological Activity Of Plant Polysaccharides, Huang Rengui, Liu Jia Nov 2016

Effects Of Extraction Methods On The Biological Activity Of Plant Polysaccharides, Huang Rengui, Liu Jia

Food and Machinery

Plant polysaccharides are natural biological active substances, and possess a series of biological activities, including anti-tumor, immune regulation, lowering blood fat, lowering blood sugar, anti oxidation, anti-fatigue. The activities of polysaccharides are influenced by their species, parts, extraction methods and other factors. In order to provide a theoretical reference for the development and utilization of plant polysaccharides, the research status of them and the effects of extraction methods on their biological activities were reviewed in this paper.

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Transformation Of Criminal Law Regulation On Food Safety Of China In The Risk Society, Liu Lizhen, Huo Jianping Nov 2016

Transformation Of Criminal Law Regulation On Food Safety Of China In The Risk Society, Liu Lizhen, Huo Jianping

Food and Machinery

The frequent occurrence of food safety in modern society is the typical performance of risk society in the field of food. Under the risk society, due to the ongoing and expansion of food safety risk, people's special requirements for food safety, as well as prevention based traditional criminal law regulation is insufficient to ensure the food safety, the measures must be done, for expanding the food safety law adjustment range, paying attention to the restoration norms of criminal law and adhereing to the principle of modesty etc.. All these can contribute to the smooth transition of China's food safety regulation …

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Problems And Their Resolvements Of Health Food Under The New Food Safety Law, Li Rongqin Nov 2016

Problems And Their Resolvements Of Health Food Under The New Food Safety Law, Li Rongqin

Food and Machinery

“Food Safety Law” has made great progress in health food regulation and promotes the development of the industry, while there still exists some problems. Therefore, it is suggested that we should make a unified materials directory of health food through blending provisions of Ministry of Health and "Food Safety Law". Besides, we should eliminate false propaganda by the way of improving filing review and verification system as well as suck marketing behavior into scope of business license management with severe legal liability. Moreover, we also need to carry out classification management of registration and filing and reaffirms the importance of …

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Species Distribution Model For Swift Fox In Nebraska, Lucia Corral Hurtado Nov 2016

Species Distribution Model For Swift Fox In Nebraska, Lucia Corral Hurtado

Nebraska Department of Transportation: Research Reports

No abstract provided.

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Optimal Design On A Brushless Dc External Rotor Motor, Liu Zhiqiang, Shu Ganghua, Du Ronghua, Yang Zhonghua Nov 2016

Optimal Design On A Brushless Dc External Rotor Motor, Liu Zhiqiang, Shu Ganghua, Du Ronghua, Yang Zhonghua

Food and Machinery

Cogging torque ripple is the main impact factor of the output torque ripple of electric vehicles driven by wheel hub motors. To suppressing cogging torque ripple, a DC external rotor motor was studied, and a finite element analysis model was established in Ansoft Maxwell according to its structural parameters. The simulation results of cogging torque agreed well with those obtained from experiments, and this showed the analysis model was correct. Then, the main parameters of the hub motor were optimized by using Taguchi method, in which the peak values of cogging torque and average values of output torque were taken …

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Preparation Ofα-Glucosidase Inhibitory Peptides Derived From Ginkgo Biloba By Enzymatic Method, Zhang Can, Wu Caie, Fan Gongjian, Li Tingting, Wang Jiahong, Gong Hao, Cao Fuliang Nov 2016

Preparation Ofα-Glucosidase Inhibitory Peptides Derived From Ginkgo Biloba By Enzymatic Method, Zhang Can, Wu Caie, Fan Gongjian, Li Tingting, Wang Jiahong, Gong Hao, Cao Fuliang

Food and Machinery

The preparation of α-glucosidase inhibitory peptides was gotten, which was derived from ginkgo biloba by enzymatic hydrolysis with papain. A factorial design experiment was conducted, while, the effects of concentration of substrate, pH, E/S ratio, extraction temperature and time were studied. And then, it was fractioned by using membrane ultrafiltration with molecular weight cutoffs of 100, 50, 30, 10 and 3 kDa. The results showed: with the concentration of substrate 1.5%, pH 7.36, E/S ratio of 5 g/100 g, temperature of 57.9 ℃ and extraction time of 4.4 h, the inhibitory activities ofα-glucosidase was the highest, and reached 17.18%. The …

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The Research Progress On Near Infrared Spectroscopic In The Non-Destructive Detection Ofthe Quality Of Edible Oil, Li Juan, Liang Shuyu Nov 2016

The Research Progress On Near Infrared Spectroscopic In The Non-Destructive Detection Ofthe Quality Of Edible Oil, Li Juan, Liang Shuyu

Food and Machinery

The Near infrared spectroscopy analysis technique, with the characteristics of high efficiency and speediness, non-destructiveness, environmentally friendliness and easiness to operation, has developed fast in the past few years and is widely used in quality identification of agricultural products. In this paper, it was summarized and prospected the application progress in many aspects, such as the detections of physicochemical index of edible oil, chemical changes during frying, adulterated oils, and the kinds of edible oil by using Near Infrared Spectroscopy analysis technique and chemometrics in recent years. This review provided the direction and basis for the further analyses of edible …

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Diversity And Impacts Of Mining On The Non-Volant Small Mammal Communities Of Two Vegetation Types In The Brazilian Amazon, Natália Carneiro Ardente, Átilla Colombo Ferreguetti, Donald Gettinger, Pricila Leal, Ana Cristina Mendes-Oliveira, Fernanda Martins-Hatano, Helena Godoy Bergallo Nov 2016

Diversity And Impacts Of Mining On The Non-Volant Small Mammal Communities Of Two Vegetation Types In The Brazilian Amazon, Natália Carneiro Ardente, Átilla Colombo Ferreguetti, Donald Gettinger, Pricila Leal, Ana Cristina Mendes-Oliveira, Fernanda Martins-Hatano, Helena Godoy Bergallo

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The CarajaÂs National Forest contains some of the largest iron ore deposits in the world. The majority of the minerals are found below a plant community known as Savana Metalo fila, or ªCangaº, which represents only 3% of the landscape within the CarajaÂs National Forest (CNF). The aim of our study was to understand the diversity of community of non-volant small mammals in the two predominant vegetation types: Ombrophilous Forest and Canga, and to examine how mining impacts these communities. Sampling was conducted from January 2010 to August 2011 in 11 sampling sites divided by the total area of Canga …

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Studies On Volatile Oil Extracting Process Optimization By Supercritical Co2 And Analysis By Gc—Ms Of Allium Mongolicum Regel Flowers, Wen Junfeng, Liu Xia, Gao Liguo, Li Rui Nov 2016

Studies On Volatile Oil Extracting Process Optimization By Supercritical Co2 And Analysis By Gc—Ms Of Allium Mongolicum Regel Flowers, Wen Junfeng, Liu Xia, Gao Liguo, Li Rui

Food and Machinery

The volatile oil from the Allium mongolicum Regel flowers by supercritical-CO2 fluid extraction(SFE) was optimized using response surface methodology(RSM)，and the volatile oil was identified by GC—MS. The effects of the extraction pressure, extraction temperature, extraction time on the yield of volatile oil were investigated by a three-factor and three-level Box-Behnken central composite design with the extraction rate as the response value. The results showed that the optimum conditions for the extraction of Allium mongolicum Regel flower oil were as follows: extracting temperature 39 ℃, pressure 29 MPa, time 1.2 h, CO2 flux 20 L/ h. Under such condition, …

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The Conditions And Methods Of Low Temperature Grain-Storage Technology With Solar Adsorption Refrigeration System, Feng Bo Nov 2016

The Conditions And Methods Of Low Temperature Grain-Storage Technology With Solar Adsorption Refrigeration System, Feng Bo

Food and Machinery

In this study, solar powered adsorption refrigeration system was investigated to study its application in storage at low temperature, and the thermal performance of the system has been tested and analyzed. The results showed that at the high temperature in summer season, when the solar refrigeration system was cooled at 12:00~13:00, the solar thermal collector surface radiation intensity is about 3.0 MJ/(m2·d), and the refrigeration power system is about 3.9 kW distribution according to time. Moreover, the it was found that cooling power and low temperature storage required cooling capacity in general. Under the condition of solar radiation …

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Study On Irradiation Sterilization And Dose Of Semi-Finished Micropterus Salmoides, Wang Weiqiong, Xiong Guangquan, Chen Yuxia, Bai Chan, Li Hailan, Zu Xiaoyan Nov 2016

Study On Irradiation Sterilization And Dose Of Semi-Finished Micropterus Salmoides, Wang Weiqiong, Xiong Guangquan, Chen Yuxia, Bai Chan, Li Hailan, Zu Xiaoyan

Food and Machinery

In order to regulate the technical conditions of irradiation sterilization for semi-finished Micropterus salmoides (SFMS), we investigated the impacts of irradiation on the microbe quantity, pH value, water holding capacity, color value and volatile components of it in this study, by using different doses ranging from 0.00 to 8.74 kGy of 60Co gamma ray irradiation. The results showed that, with the irradiation of 3.25 kGy, the total bacteria decreased to 10 CFU/g. Moreover, the total bacteria decreased to 250 CFU/g and 10 CFU/g, at the D10 value of 1.54 kGy and 3.64 kGy, respectively. At the range of …

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Supercritical Co2 Extraction Of Idesia Polycarpa Oil And Analysis Of Its Fatty Acid Composition, Kuang Chuntao, Wu Bin, Tang Hongwei, Xiang Shu, He Jianyang Nov 2016

Supercritical Co2 Extraction Of Idesia Polycarpa Oil And Analysis Of Its Fatty Acid Composition, Kuang Chuntao, Wu Bin, Tang Hongwei, Xiang Shu, He Jianyang

Food and Machinery

To make full use of Idesia polycarpa resource, the optimum conditions of extracting oil in I. Polycarpa by supercritical CO2 were studied by single factor and Box- Behnken designs, and the fatty acid composition of this oil was analyzed by gas chromatography-mass spectrometry (GC-MS). The results showed that the yield of the oil in I. polycarpa extracted by supercritical CO2 was (38.25±0.41)%, when extracted at 24 MPa and 53 ℃ for 147 min. Moreover, the regression model between yield and influence factors was very significant (P=0.000 9). In addition, the results of GC-MS showed that the total content …

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Study On Extraction Of Honeysuckle Polysaccharide By Internal Boiling Method, Li Jianfeng, Li Chen, Liao Limin Nov 2016

Study On Extraction Of Honeysuckle Polysaccharide By Internal Boiling Method, Li Jianfeng, Li Chen, Liao Limin

Food and Machinery

The internal boiling method was adopted to extract polysaccharides from honeysuckle. The effects of ethanol concentration, extraction temperature and time, and water-solid ratio on the extraction rate of polysaccharides were discussed. The results showed that the extraction rate of polysaccharide reached 12.89%, when the ethanol concentration (v/v) was 20%, with water-soild ratio was 30∶1 (mL/g), at 95 ℃ for 5 min.

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Research On The Alcohol Precipitation And Purification Treatment On Tobacco Extracting Solution Of Reconstituted Tobacco By Paper-Making Process, Huang Ming, Yao Jianwu, Yao Yuanjun, Tang Xiangbing Nov 2016

Research On The Alcohol Precipitation And Purification Treatment On Tobacco Extracting Solution Of Reconstituted Tobacco By Paper-Making Process, Huang Ming, Yao Jianwu, Yao Yuanjun, Tang Xiangbing

Food and Machinery

A method for papermaking reengineering qualitative alcohol sink tobacco leaf tobacco extract purification processing method was proposed in this study. Tobacco extract was precipited by 95% ethanol after pre-concentration treatment, and then it was centrifuged to remove the impurities, and macromolecular substances without favoring the sensory quality, such as protein and pectin. Moreover, the pre-concentration of solid content was also examined, including the alcohol concentration, alcohol sink factors, and sink time extract, influencing of sensory quality. The results showed that the papermaking method reconstruction tobacco leaf tobacco extract pre-concentration to solid content was 20%, 40% to 95% of the pre-concentrate …

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