Carbon fiber reinforced poly ether ether ketone (CF/PEEK) composite possesses excellent biocompatible, biomechanical and bioribological properties. It is one of the most promising implant materials for artificial joint. Many factors influence the bioribological properties of CF/PEEK composites. In this paper, the authors reviewed on the biotribology research progress of CF/PEEK composites. The influences of various factors such as lubricant, reinforcement surface modification, functional particles, friction counterpart and friction motion modes on the bio-tribological properties of CF/PEEK composites are discussed. Based on the recent research, the authors suggest that the further research should be focused on the synergistic effect of multiple factors on the wear and lubrication mechanism of CF/PEEK.
Biocompatible Materials ; Carbon ; Friction ; Ketones ; Lubrication ; Materials Testing ; Polyethylene Glycols

Several factors influencing the extraction of tetrandrine and demethyltetrandrine from Chinese medicinal herbs, Stephania tetrandra S. Moore were studied by means of Ortogonal method. The optimum Condition was eight hours steeping, in 33.3% ammonia in absolute alcohol for four hours under ultrasonic agitation. Tctrandrine aud demethyltetrandrino were detected by HPLC. The contents were 0.678% and 0.616%, the detection limits were 3.87?10-3and 0.48?10-3 mmol/L respectively.

c-Jun N-terminal kinases(JNKs)play an integral role in neuronal death in multiple cell lines following a wide variety of stimuli and in a number of physiological functions which have been recognized as important enzymes in cellular function.JNK has been implicated in several neurodegenerative diseases.Data are emerging to extend the understanding of the JNK signaling and confirm the possibility that targeting JNK signaling may offer an effective therapy for pathological conditions in the near future.Because of the involvement of JNK in neuronal diseases,the inhibition of this enzyme is an attractive therapeutic target.

For observation on clinical therapeutic effect of modified Wei Er Fang on gastric precanceraus lesion (GPL), 90 cases of GPL were divided into 3 groups, the treatment group treated with modified Wei Er Fang, the control group I treated with Wei Fu Chuan and the control group I with Bismuth subcitrate, 30 cases each group. Results indicated that the total effective rate for clinical symptoms was 96. 67% in the treatment group which was significant different from 60. 00% in the control group I (P 0. 05), but the therapeutic effect on heterotypic proliferation in the treatment group was superior to those in the two control groups. It is showed that modified Wei Er Fang has a better action of reversing gastric precancerous lesion.

Objective: This study explores the applicability of a multi-attribute decision-making method in assessing Guizhi Decoction (GZD) and its varieties as noted in the Shanghanlun. Methods: A known multi-attribute decision-making method, the analytic hierarchy process (AHP), was adopted to transform the clinical challenge of selecting optional decoction for a given combination of symptoms or signs into multiple criteria decision-making problem. Results: A normative model based on the AHP was realized for indications of GZD and its varieties. The indications of sub-family GZD-f (indications of GZD itself) were exterior illness; the indications of GZD-vf1 (indications of GZD's variants which consist of fine adjustments to the ingredients or content on the basis of GZD) were exterior illness with interior excess, suggesting that GZD-vf1 consisted of most conservative variants of GZD; the indications of both GZD-vf2 (indications of Guizhi Qu Shaoyao Decoction and its derivative variants) and GZD-vf3 (indications of Guizhi Gancao Decoction and its derivative variants) showed evolution from exterior illness to interior deficiency in 2 directions. As to efficacy evaluation of the decoction, GZD and its varieties (restricted to those comparable ones) were of equal efficacy on 3 popular signs or symptoms indicating exterior illness: floating pulse, aversion to wind and spontaneous sweating, which were the common ground of indications for the GZD family. Conclusion: Modeling of diagnostic procedure based on the AHP is proved practicable to analyze the clinical judgment system of traditional Chinese medicine. Quantification research on syndrome differentiation and decoction evaluation system focused on signs and symptoms is suggested as a feasible and reliable model.

Objective To study the ginseng polysaccharides for prolonging the life span of the C.elegans and inhibit the toxic effects of polyQ accumulation.Methods Caenorhabditis elegans of HA759 and AM141 were divided into control group and Ginseng group, seprately.Control group didn’ t do any special treatment, Ginseng group were given 10 mg/mL polysaccharide and OP50-1 in the proportion of 1:4 mixed volume to 50 mL.C.elegans of glutamine ( polyQ) polymer HA759 neurotoxicity model test of glutamine protein polymer toxicity experiment were done.The ASH neuron survival condition were tested.After sampling statistics gathered nematodes in the whole fluorescent points every day, study ginseng polysaccharide on polymers glutamine aggregation inhibition.Finally the solid life of two C.elegans were studied.Results The survival rate of ASH neurons in Caenorhabditis elegans HA759 of control group after 3 days culture was 53%.which of Ginseng group was 64% (P<0.05).The fluorescence of 48~96h aggregation points in Caenorhabditis elegans AM141 of control group were(6 ±1), (27 ±2), (56 ±4), which of Ginseng group were (4 ±1) in 48 h, (20 ±3) in 72 h and (45 ±2) in 96 h, the differences between two groups were all significant(P <0.05).The average survival time of Caenorhabditis elegans AM141 of control group was (23 ±2)days, which of Ginseng group was (27 ±2)days;average survival time of Caenorhabditis elegans HA759 of control group was (24 ±2)days, which of Ginseng group was (27 ±2)days,the difterences were all signiyicant(P<0.05).Conclusion Ginseng polysaccharides can not only prolong the lifespan of the C.elegans, but also can restrain polyQ gathered and ease the polyQ neurotoxicity associated with aging.

OBJECTIVE:To study in vitro effects of tanshinoneⅡA to reverse multiple drug resistance. METHODS:MCF-7/ADM cells and A549/DDP cells were cultured with 0 [20 mg/L doxorubicin(ADM)or cisplatin(DDP),negative control],5 mg/ml tanshinone ⅡA(combined with 20 mg/L ADM or DDP)for 24 and 48 h. Then MTT method was used to determine cell viability, and polymerase chain reaction(PCR)was adopted to detect mRNA expressions of cell cycle control protein CDC25A and cell cy-clin dependent kinase (CKD2). RESULTS:Compared to the negative control,after MCF-7/ADM cells and A549/DDP cells were cultured with tanshinone ⅡA for 24 and 48 h,cell viability was weaker,also were mRNA expressions of CDC25A and CKD2. There were statistical differences(P<0.01). CONCLUSIONS:Tanshinone ⅡA combined with ADM or DDP can inhibit the viabili-ty of cell line MCF-7/ADM and cell line A549/DDP,decrease expression of CDC25A,CKD2 mRNA in cells and reverse multiple drug resistance in malignant tumors.

With the common application of total mesorectal excision (TME) technique,the proportion of sphincterpreserving surgery for the mid-low rectal carcinoma is significantly increased.Anastomotic leakage after sphincter-preserving surgery is the most severe complication of rectal surgery,and it is the main reason which will lead to other complications and death.Many researches on the early diagnosis,prevention and treatment of anastomotic leakage are conducted by surgeons at home and abroad,and a further understanding of this complication is deeply realized.

Objective To study of manifestation of adenomyomatosis of gallbladder from MRI and to improve its accuracy of diagnosis .Methods MR features of 24 cases with adenomyomatosis of gallblad-der from 2006 to 2008 proved by operation and pathology were analysed retrospectively .Results Among 24 patients, 20 cases were diagnosed correctly before operation ,four were misdiagnosed as Chronic cholecysti-tis and carcinoma of gallbladder respectively; all cases of gallbladder wall increased thickness from 5 to 12mm (7mm average).Among them, the gallbladder -wall was thickened as limited type in fourteen cases , segment type in eight cases and diffuse type in two cases .And classical Rokitansky-Aschoff sinuses were clearly displayed in 20 cases by lamina T2WI from MRI .Conclusion MRI might has higher diagnostic value in diagnosing of adenomyomatosis of gallbladder .

Objective To evaluate the current status and outcomes of pelvic exenteration (PE) for recurrent cervical cancer.Methods The following electronic databases has been searched on recurrent cervical cancer management and treatment:Chinese Biological Medicine Disk (CBM),PubMed and Cochrane library.All retrieved studies had to fulfill the following inclusion criteria:cohort studies of recurrent cervical cancer,containing information of detailed patient and operation characteristics as well as the survival rate.Only publications in the English literature were included.All eligible literatures between Jan.1990 and Aug.2013 were assessed for quality.Relevant basic characteristics,complications,survival rate and prognostic factors were reviewed.Results There were eight trials involving 607 patients with cervical cancer received PE,including 515 cases with recurrent disease and 92 cases with primary disease.Four hundred and ninety patients had received total pelvic exenteration (TPE) operation,103 underwent anterior pelvic exenteration(APE) and 14 received posterior pelvic exenteration(PPE).The 5-year overall survival rate for recurrent cervical cancer fluctuate from 26.7％ to 56.0％.Complication rates were from 34.3％ to 83.3％ and the mortality rate was 1.2％ (7/607).Among the relevant factors affecting survival time,resection margin status seemed to be the most important.Conclusion Based on this systematic review,PE does help improve the survival of recurrent cervical cancer patients on the basis of strict selection of candidates.