Objective To research the optimum hydrolysis conditions of oyster protein so as to raise the protein recovery and degree of hydrolysis.Methods Considering protein recovery,degree of hydrolysis,bitterness and clarity,the best enzyme was selected;Orthogonal test was designed to determine the best enzyme hydrolysis conditions;Based on hydrolysis and protein recovery,the effect of heat treatment,ultrasound and microwave processing and handling on enzymatic hydrolysis of oyster were investigated.Results and Conclusion Bromelain protease was suitable for the proteolysis of oyster,and the optimal conditions were:pH 6,temperature 55℃,substrate concentration 1∶3,E/S=800U/g,4 hours.In the optimal condition,the recovery of protein and degree of hydrolysis were 67.55%and 29.86% respectively in the hydrolysate.Heating,ultrasound technology and microwave treatments before hydro-lysis were harmful to enzymatic hydrolysis of oyster.

Objective To study the application values in chest bedside photograph of newborn by CR.Methods 210 CR images of newborn chest bedside photograph were analyzed retrospectively and evaluated.Class A is 201 leaves,the A rate is 95.7%;Class B is 9 leaves,the B rate is 4.3%;Class waste is 0,the waste rate is 0.Results The application value can be improved by appearing digitalization imaging and entering PACS system.Conclusion In spite of the characteristic in the faster diagnosis speed,the lower exposure of X-ray,the higher quality image and succeed rate,it can be given guides for clinic image diagnose.

Nerve growth factor (NGF) can promote the outgrowth of neurites of the target ganglia. In order to further explore the relationship between this effect and the synthesis of RNA and DNA in the neurons, an autoradiography of 3~H-uridine and 3~H-thymidine was used. Superior cervical ganglia (SCG) from newborn rats were cultivated by Maximow's double coverslip method. All cultures were divided to one group of cultures a crude preparation of NGF was added to the medium and another group without NGF served as control. Before tissue culture was stopped, the. covership cultures were transferred to thelabeling-medium and incubated, and then they were fixed, and cut into serial sections and subjected to autoradiographie processes. The results show that the percentage and the level of grains of neurons labeled by 3~H-uridine in the NGF group are higher than that of control. Moreover, before the growth rate of neurites reaches a peak, the level of grains of neurons labeled by 3~H-uridine in the NGF group is obviously increased. The evidence suggests that NGF can promote the synthesis of RNA in neurons of SCG, which has a direct bearing on the quick outgrowth of neurites. In the experiments with 3~H-thymidine incorporation, that the NGF may promote the synthesis of DNA in some neurons of the third day SCG in vitro was also observed.

Vogt-Koyanagi-Harada (VKH)syndrome is an autoimmune disease attacking against pigmented cells, resulting in blindness and usually affecting multiple organs including ears, meninges, hair and skin.Correct diagnosis and immediate treatment in the early stage is vital to visual prognosis.Currently, corticosteroids is first-line drug.In addition, VKH patients refractory to corticosteroids can choose other treatment such as immunosuppressive agents and biological agents.

Objective To investigate physical activities of preschool children by gender and to explore the effects of activity type on bone indexes.Methods During 2009 and 2010,397 preschool children of 3-5 years old were randomly selected from 4 kindergartens in Chengdu Province of China.Ultrasound bone analyzer was used to assess children's bone mass.A physical activity questionnaire was completed by parents to evaluate physical activities at leisure time.Student's t test and least square regression were used for data analysis.Results Concerning activity types,boys spent more leisure time on running and Wushu than girls did (t values were 1.94 and 2.84,respectively ; both P ＜ 0.05).However,girls spent more time on dancing (0.78 h),jumping rope (0.08 h) and manual labour (0.22 h) each day (t values were-9.50,-3.43 and-1.92,respectively; all P ＜ 0.05).The weekly total exercise time and energy consumption per unit of body weight of girls vs.boys were 7.29 vs.6.51 h and 127.57 vs.113.85 kJ (t values were 2.63 and 2.04,respectively ; both P ＜ 0.05).About per day time on sleeping and per week time on watching television,there were no significant difference between boys and girls (t =0.180,0.520;P ＞0.05).But boys spent more time on electronic game and computer than girls (t =0.760,2.510;P ＜ 0.05).The normalized correlation coefficient for bone mass and moderate physical activities or jumping was 0.184 and 0.275,respectively (both P ＜ 0.05).Conclusions Our data suggest that preschool children's bone volume may be positively correlated with moderate physical activities and jumping activities.Introducing some moderate physical activities or activity appliance,toys and playing fields as well as increasing professional training might be helpful.

Objective To investigate the possible abnormal changes of adult neurogenesis in the rostral migratory stream(RMS),in the olfactory bulb and in learning or memory of renovascular hypertensive rat,and to evaluate the possible efficacies produced by intervention of exogenous melatonin.Methods Renovascular hypertensive rat model was established by clamping bilateral renal arteries.Rats were randomly divided into four groups with 10 rats per group:hypertensive,sham-operated,melatonin-treated and normal groups.Morris water maze was used to detect the abilities of learning and memory,and immunohistochemistry for bromodeoxyuridine (BrdU),bromodeoxyuridine plus glial fibrillary acidic protein (BrdU + GFAP) and bromodeoxyuridine plus neurofilament (BrdU + NT) was utilized to examine the changes of the adult neurogenesis in RMS and in the olfactory bulb of each rat.Results The escape latency of hypertensive group ((29.95 ± 20.11) s) recorded in Morris water maze test was the longest in a significant comparison to those of normal group((20.58 ± 19.18)s),sham-operated group ((22.11 ± 20.28) s) and melatonin-treated group ((23.81 ± 22.25) s) (P ＜ 0.05) ; while the time spent by rats during swimming in the quadrant with being originally put platform of hypertensive ((25.51 ± 5.21) s) was the shortest by significant comparison to those of normal((34.67 ± 4.53) s),sham-operated ((33.56 ± 6.12) s) and melatonin-treated group ((36.23 ± 3.86)s) (P ＜ 0.05).Proliferation of neural stem cells (cells/field):the number of BrdU immunoreactive (BrdU-IR) cells of rats in RMS of hypertensive group(34.08 ±6.49) was the smallest,significantly compared with those of normal(43.53 ± 7.56),sham-operated (46.11 ± 4.75) and melatonintreated group (44.30 ± 8.29),(P ＜ 0.05).Differentiation of neural stem cells (cells/slice):the number of BrdU + GFAP-IR cells in olfactory bulb of hypertensive group (2.45 ± 1.32) was largest,significantly compared with those of normal (1.01 ± 0.78),sham-operated (0.68 ± 0.37) and melatonin-treated group (1.35 ± 0.88) (P ＜0.05) ; while the number of BrdU + NF-IR cells in olfactory bulb of hypertensive group (1.15 ± 0.81) was the smallest,significantly compared with those of normal (1.89 ± 0.98),sham-operated(1.63 ± 1.01) and melatonin-treated group (2.30 ± 1.22) (P ＜ 0.05).Conclusion Melatonin can ameliorate the abnormal cognitive behaviors induced by hypertension via a mechanism of reversing the progression of neurogenesis disorders both in RMS and in olfactory bulb,indicating that melatonin may prevent the development of dementia triggered by hypertension.

Objective To investigate the expectation values of dental esthetics during the orthodontic treatment in adolescents with malocclusion.Methods 14～18 year-old adolescents with malocclusion were randomly divided into the treatment group (30 cases) and the control group (21 group) for a prospective study with a period of 1.5 years (0,0.5,1.0,1.5 year respectively),esthetics components of index of orthodontic treatment need (IOTN-AC) and self-made sheet for expectation values of dental esthetics were used to evaluate the values during the follow-up.Results During the follow-up,the IOTN-AC values in the treatment group were decreasing,conversely,the values in the control group were increasing,the expectation values of dental esthetics were increasing in both of the two groups,the differences above were significantly.Conclusions Expectation values of dental esthetics were higher during the follow-up in both of the treatment and untreatment cases,so the dentists and the nurses should encourage the consolidation therapy in treatment cases,and persuade the untreatment cases for orthodontic therapy in order to improve their psychological needs.

Objective To prepare the “bacterial ghost” of E.coli with heat-induction and analyse its lysis rate and configuration. Methods Through immediately shifting the culture temperature from 37℃ to 42℃, E.coli DH5? including plasmid pMuH36 was induced to lyse, and the OD value of culture media was measured every 30 minutes during the induction. After 4 hours of induction, the bacteria samples were collected to examine the lysis rate by CFU (colony formation unit) and the configuration of lysed bacteria was observed by transmission electron microscopy (TEM). Results The OD value of DH5? (pMuH36)began to decline after 1 hour of induction, and increased slowly after 4 hours of induction. The CFU assay showed that the lysis rate was about 95%. TEM observation proved that most of the lysed bacteria were emptied, whereas the whole outmembrane structure, i.e. “bacterial ghost”, remained. Conclusions The E.coli “bacterial ghost” was efficiently prepared and identified, which might provide the basis for further development of a more effective “bacterial ghost” vaccine and adjuvant.

[Objective]To investigate the effect of a single subcutaneous dose of an antisense oligonucleotide(ASO) on particle-induced osteolysis.[Method]The murine calvaria osteolysis model was utilized in ICR mice.Bone resorption was measured with the toluidine blue staining.Osteoclasts were detected by tartrate resistant acid phosphatase(TRAP) staining assay and were quantified by a TRAP quantification kit.[Result]Bone resorption was 0.347 ? 0.09 mm2 in animals with particle implantation,and decreased to 0.123 ? 0.05 mm2 and 0.052 ? 0.02 mm2 after ASO treatment in low and high doses,respectively.The bone resorption was reestablished in animals given an additional TNF-?.The number of osteoclasts in animal calvaria treated with ASO was reduced obviously compared with those untreated animals and the quantification results indicated that about 90% osteoclastgenesis was suprressed by the ASO.Additionally,the osteoclastgenesis was reestablished by the addition of TNF-?.[Conclusion]An antisense oligonucleotide targeting an inflammatory factor,TNF-?,has been to suppress the osteolysis induced by particle for the first time.This new finding holds a great promise.It is a therapeutic strategy for the component loosening.

Objective To observe the curative effects of bezafibrate combined medroxyprogesterone acetate in the treatment of AML .Methods 40 cases of AML patients were collected and devided into experimental group (bezafibrate combined medroxypro-gesterone acetate ,6 cases) ,control group (chemotherapy ,28 cases) and non-treatment group (6 cases) ,then through a prospective analysis we studied the curative effects and related results of bezafibrate combined medroxyprogesterone acetate in the treatment of AML .Results The median survival time of the experiment group (accepted bezafibrate combined medroxyprogesterone acetate ) was 15 weeks ;the median survival time of the control group (accepted chemotherapy ) was 24 weeks ;the median survival time of the giving up group(accepted any therapy ) was 8 weeks .Conclusion Bezafibrate combined medroxyprogesterone acetate could prolong the survival time of AML patients and there were no obvious adverse reactions .