The scavenging effect of LBP2 (one component of polysaccharides from Fructus Lycii,the fruit of Lycium barbarum L.) on hydroxyl radicals (·OH) was studied by salicylic acid method.To study the anti-oxidative effect of LBP2 on ·OH,the content of MDA in liver was measured by TBA assay ,the mitochondria membrance fluidity in liver was measured by the fluorescence polarization assay with DPH fluorescence probe,and the hemolysis extent of red blood cells and the swelling extent of mitochondria of liver were detected by spectrophotometric methods.The result showed that LPB2 had the ·OH scavenging activity.It could inhibit the generation of MDA,the decrease of mitochondria fluidity,the swelling of mitochondria,and the hemolysis of red blood cells induced by ·OH .The conclusion was that LBP2 had the effect of anti-·OH induced oxidation.

This paper is about the mechanical properties of gelatin-carrageenan co-gels. Small and large deformation experiments are carried out. Storage modulus(G’) increase with carrageenan increase in co-gels. Many factors influence the texture characterization such as pH value, inon strength,the ratio of gelatin/carrageenan.

Studied the properties of CPPs derived from different degrees of hydrolysis of casein and found the relationship between the CPPs activity to prevent calcium precipitate and the degree of hydrolysis of casein.The result of study showed that CPPs contained different N/P at the different ratios of enzyme to substrate.The activity of CPPs to prevent calcium precipitate was different at different N/P.The activity of CPPs to prevent calcium precipitate was lower as N/P was higher,and was higher as N/P was lower.

Highly purified amylopectin and amylose from ginkgo biloba L.starch could be obtained by recrystallization.Results of gel permeation chromatography (GPC) on sepharose 2B showed that molecular weight of ginkgo amylose appeared to be smaller than that of corn amylose,whereas the amylopectin molecular weight had a wide distribution in the GPC profile.For ginkgo amylose and amylopectin,iodine affinity values were 19.19% and 0.13%,blue values 0.85 and 0.12,and λmax of I2-KI blue colour 626nm and 564nm ,respectively.Amylose content of ginkgo starch was 33%.

A hot-wire method was presented for measuring the thermal conductivity of food materials.The measuring technique,in order to assure the reliability of measuring results was discussed in detail . The measured results of the food materials, such as apple, cucumber and so on, were reported.It was found that the thermal conductivity has shown the linear relations to the water contents approximately,and a new expression with the relationship between the thermal conductivity of food materials and their water content was drawn.

The extract of Rosa Laevigata Michx to remove great part of NO-2 in the duplicating pH condition as gastric juice.It eliminated more than 87 percent of nitrous acid in the optimum extraction conditions:0.1% citric acid as extraction solvent,the ratio of solid and liquid 1 to 3,60℃ temp. and 1 hour extraction time.The elements of Rosa Laevigata Michx extracts such as vitamin C,reducing sugar and flavonoid to work to remove NO-2.When in low pH (pH2～3),it has great capability of eliminating NO-2,but with increasing of the pH value,the capability of clearing up reduced sharply.

The optimum fermentation technological factors were studied on foxtail millet beverage by Orthogonal of Regression Design.The results were the starting sugar concentration 12% ,fermented at 37℃ for 60h using 2.5% inoculum. We also compared the changes of nutritive compositions between fermented and nonfermented millet. The results showed that the nutritive value increased obviously by the lactic acid fermentation.

This paper mainly introduced the processing and manufacturing of the drink by mixing lotus root,couchgrass root and chrysanthemum.It also probed into its specific technology,offering a reference for the technicians concerned.

The non-alcoholic beverage was prepared through the fermentation of black tea juice extract by Lactic acid bacteria and yeast.The black tea extract was infused with corn syrup.The optimum fermentation conditions were obtained through orthogonal test.With these conditions,the fermented tea beverage was rich in nutritional value with distinctive flavor.

The technology for preparation of high yield and stable pinenut milk has been studied.Pinenut milk with fat content of 4% was made by homogenizing the aqueous extraction of pinenut slurry under the choosen conditions (pH8.0 solid to solvent ration1:15,55℃ and time duriation 40min).Turbidity method was used to evaluate the efficiency of emulsifiers, and the result showed that the most suitable emulsifier for pinenut milk system was the mixture of PVP and PGE55 at the ratio of 2:1 .The effect of homogenizing conditions, dosage of sugar and CMC-Na on the storage stability of pinenut milk was studied by tesing precipitation stabillty and fat distribution index of the samples.The most desirable sample was obtained by homogenizing at 245kg and 65℃,with adding a sugar content of 4%.

The optimum technological conditions of processing ginkos preservd fruit were studied.The rsults showed that a fine quality ginkos preserved fruit was obtained,with the vacuum 0.089MPa,concentration gradient of sugar solution 30%→50%→70%,time of vacuuming 20 minutes each for three times,gas-filled 90 minutes ,then infusing about 6 hours,finally drying and packaging.

The control effect of several kinds of natural antioxidants on VC loss in the process of strawberry washing and pulping was studied in this paper.Meanwhile they were compared with the effect of EDTA which has been freguently used in food processing.The results showed that 0.015% PA (Phytic Acid) could effectively control the VC loss in strawberry prolessing VC preservation yield has reached 91.62% in washing and 70.19% in pulping. Mixed with 0.015% natural antioxidants,VC preservation yield could be increased to 92.74% in pulping.

Quality evaluation of quick-frozen Tangyuan made of glutinous maize and glutinous rice was made.The result showed that the quick-frozen Tangyuan made of glutinous maize was practical.The Processing Procedure of glutinous maize Tangyuan was proposed.

To study the optimum conditions for simultaneous determination of additives in drink, the reversed phase high performance liquid chromatography and the optimum determination wavelength were applied. The Benzoic Acid , Sorbic Acid , Saccharin Sodium , Tartrazine , Amaranth , Ponceau 4R , Sunset Yellow , Brilliant Blue,Caffeien in drink were assayed on C18 reversed-phase column using methanol-0.02mol/L as the mobil phase. The ammonium acetate solution was: methanol: 5% , holding 4min;5%~35%,10%/min;35%~70%,17.5%min at a flow rate of 1ml/min and detected by DAD at 0~5min , 230nm ; 5~7.5min , 400nm ; 7.5~9.25min , 520nm ; 9.25~9.9min , 285nm ; 9.9~11min , 630nm . Good separation was achieved in the 9 components and the standard curve showing a direct ratio between the concentration and the peak area was obtained ,as r>0.999 , CV<1.6%(n=6). The detection limits were below 0.3ng . Recovery percent was found between 93.8% and 109.2% .Both the method and GB method as were used to determine 15 samples respectively. For comparison , the results did not show appreciable difference (P>0.05). The method proved to be satisfactory in precision , sccuracy and sensitivity . The preparation of sample was simple and the work efficiency was high.

The flavonoid compunds, carotenoids, VE and VC in the leaves of Cyclocarya Paliurus (Batal.) Iljinsk, were determined by chemical and instrumental methods. The results showed that the flavonoid in the leaves of Cyclocarya Paliurus (Batal.) Iljinsk collected from Xiushui and Jinggangshan of Jiangxi Province were 6.26mg/g and 6.05mg/g, respectively；carotenoids: 2.08mg/100g and 3.07mg/100g respectively；VE: 7.02 mg/100g and 7.57 mg/100g respectively；VC: 3.08mg/100g and 3.42mg/100g respectively.

An atmoic fluorescence spectrometry for the assay of micro arsenic content in tea was developed with high sensitivity and fine accuracy.The curve range was 0～180ng/ml with correlation coefficient 0.9993.The limit of detection was as low as 4μg/kg and the recovery rate was 90.0%～97.3%.

H+ was freed from H2PO-4 by adding La(NO3)3 solution as precipitation releasing agent.The concentration of the freed H+ was directly titrated by the standard NaOH solution.The content of phosphorus of Ca3(PO4)2 or CaHPO4 was calculated by the consumption of the standard NaOH solution.All the operations of titration and pH adjustment were completed by the Automatic Potentiometric Titrator.These operations in this method were simple and rapid with good precision .The complex processes in the standard method such as precipitation and filtration and scrubbing,were omitted in this method,but the results of the method were the same as those of the standard method.This method may be used to tast water soluble phosphate at pH=4.2.

After the sample was digested with HNO3-H2SO4,arsenic was converted into gaseous arsenic hydride.The silver nitrate-polyvingyl alcohol-ethanol system was absorbent liquid.Micro arsenic was determined by photometry.The recovery of the method found was 85.3%～93.7% with an average RSD 3.7%.The method offered the advantages of simplicity and sensitivity while the reagents were nontoxic.It has been applied to the analysis of commodity cosmetics with satisfactory results.

The free radical in vitro scavenging effects of 5 kinds healthcare medicines were studied.Their scavenging effects to 1,1-Diphenyl-2-picryl －h ydrazyl (DPPH·) had a quantitative relationship ,the larger the concentration,the stronger the scavenging effects.Scavenging effects to hydroxyl radical （·OH） had the best concentration.The scavenging effects would be weakened without it.Scavenging effects to superoxide radical ()were defferent with each other.The free radical scavenging effects might be of the basis of molecular pharmacology.

Objective:Inorganic elements and vitamin are important component of nutrient in water plants.In order to judge the qualities of the four hydrophytes including taro, water chestnut,wild rice stem and water caltrop.Method:The flame atomic absorption spectrometry and titration with the 2,6-Dichloroindophenol sodium were applied to determine the content of the inorganic elements and the vitamins in them.Results:The determination results indicated that the content of the nutrients from the four water plants was higher than other common vegetable.Conclusion:It is a wide prospect that water plants could be exploited comprehensively.

Chilled meat was the fresh meat cut and deboned after quickly chilling to 0-4 ℃within 24 hours. The temperature of chilled meat was kept at 0-4℃ during packaging, distributing and being retailed. The quality of chilled meat was controlled by HACCP system.

The functions of antioxidants in food and human body were discussed.Antioxidants might protect components of the food against oxidative damage,improve the antioxidative power of human body,and cure some diseases.Methods for assaying antioxidtive activity in vitro were also reviewed.

The sources of all kinds of impurities were analyzed in detail and the effective preventive methods and counter measures were put forward in this article.It was pointed out that only by means of well provided facilities, strict rules and regulations,and constant employees’ training , the impurities contamination could be prevented from polluting food.