National standards on food contact materials are an important part of national food safety standards in China.New standards system on food contact materials in China has been established through food standards clean-up,integration and other works.In this paper,the framework of the new standard system on food contact materials is summarized.The major changes of the new standard system are compared to the old one.The challenges confronted by the industries and the problems in the new standard system are scientifically analyzed.The suggestions for future work are proposed.

Objective To analyze the application value of central region cervical lymph nodes dissection in papillary thyroid microcarcinoma (PTMC) with clinically node-negative sides of neck stage.Methods Clinical data of 72 PTMC patients with clinically node-negative sides of neck stage were collected,and they were underwent total thyroidectomy,isthmic portion excision and contralateral lobus glandularis excision and neck dissection.A long term follow-up was made.Results Twenty-four patients were found central region cervical lymph nodes metastasis while other 48 patients were not found central region cervical lymph nodes metastasis.Followed up for 1.5-4.5 (3.4 ± 1.1) years,4 patients were found recurrent laryngeal nerve paralysis and recovered within 4 months.Four patients were found central region cervical lymph nodes metastasis after operation the 3rd years.Conclusions There is a tendency for PTMC patients with clinically node-negative sides of neck stage to occur central region cervical lymph nodes metastasis,it's necessary to perform prophylactic central region dissection.It can decrease the complications and improve the prognosis.

Objective To observe the efficacy of bioelectric stimulation of the pelvic floor combined with acupuncture in treating detrusor urine weakness after transurethral resection of the prostate (TURP) in patients with prostate hyperplasia.Methods Forty-seven cases with detrusor urine weakness after TURP were randomly divided into an experimental group and a control group.All of the patients received routine bladder function training and medication.In addition,patients in the experimental group were treated with bioelectric stimulation of the pelvic floor and with acupuncture.The differences between the two groups were compared using the International Prostate Symptom Score (IPSS),maximum urine flow rate (MFR),average flow rate (AFR),detrusor pressure at peak flow (PdetQmax) and residual urine volume in the bladder.Results No significant difference was found between the two groups before treatment,but at two weeks after treatment MFR,AFR and PdetQmax were significantly higher in the experimental group than in the control group,and residual urine volume and IPSS were significantly lower.Conclusion Bioelectric stimulation of the pelvic floor combined with acupuncture is more effective than routine bladder function training and medication alone for alleviating detrusor urine weakness after TURP.

Objective To evaluate the clinical effectiveness and pseudoaccommodation in the early stage after AcrySof ReSTOR multifocal intraocular lens (IOL) and monofocal IOL implantation.Methods A total of 138 patients (158 eyes) with age-related cataract underwent phacoemulsification and IOL implantation were chosen,73eyes of 60 patients with a multifocal IOL implantation as observation group and 85 eyes of 78 patients with monofocal IOL implantation as control group.The uncorrected visual acuity,best corrected visual acuity was evaluated at 1 week,1 month,and 3 months after operation,pseudoaccommodation and quality of life was evaluated at 3 months after operation.Results The patients of both observation group and control group were able to obtain a satisfactory distance vision at 1 week,1 month,and 3 months.The uncorrected intermediate visual acuity of observation group were 0.49 ± 0.19,0.72 ± 0.21,0.77 ±0.23,which of control group were 0.24 ± 0.21,0.27 ± 0.22,0.28 ± 0.24,there were statistical differences between two groups (all P ＜ 0.05).The uncorrected near visual acuity of observation group were 0.47 ± 0.20,0.70 ± 0.22,0.80 ± 0.24,which of control group were 0.21 ±0.23,0.23 ±0.19,0.26 ±0.18,there were statistical differences between two groups (all P ＜ 0.05).There was no significant difference in the uncorrected near visual acuity,best corrected distance,intermediate and near visual acuity between observation group and control group (all P ＞ 0.05).At 3 months,the distance and near pseudoaccommodation of observation group were (2.56 ± 0.82) D,(3.19 ±1.13)D,which of control group were (0.87 ±0.57)D,(1.03 ±0.59) D,there were statistical differences between two groups (all P ＜ 0.05).At 3 months,VF-14 scale score and wearing glasses as near score of observation group were 92.21 ±4.22,4.23 ±0.85,which of control group were 71.23 ± 3.96,2.01 ± 0.71,there were statistical differences between two groups (all P ＜ 0.05).Conclusion AcrySof ReSTOR multifocal intraocular lens implantation can provide a higher level of visual acuity,pseudoaccommodation and satisfaction compared with monofocal intraocular lens.

OBJECTIVE To identify 134 fungus strains and to detect their drug susceptibility in order to instruct clinical treatment.METHODS The colored culture medium isolated fungus was identified by ID 32C.The resistance to antifungal agents,such as amphotericin B,fluconazole,itraconazole and voriconazole,was detected by ATB Fungus 3 automatic analysis system.RESULTS The isolation rate of C.albicans was the highest from 134 fungus strains,the next was C.tropicalis,the non-C.albicans infection assumed an escalation trend.From the result of drug susceptibility of 134 fungus strains,the susceptibilities to amphotricin B,voriconazole and 5-fluorocystine were the highest,the lowest to fluconazole.CONCLUSIONS As a result of the widespread application of hormons,the immunity inhibitors and the antibiotics,the change of fungal infection is increased,It is necessary to make the fungus identification and the drug sensitive experiment in order to instruct correct clinical uses of the antifungal agents.

OBJECTIVE To study the prevalence,pathogenic characteristics and drug resistance of the invasive fungal infection to provide the reference for clinical treatment.METHODS The fungi were cultured and identified conventionally.The susceptibility test was performed by K-B disk diffusion methods.The data were analyzed by WHONET 5.3 software.RESULTS Among 232 strains of fungi,isolating rate of fungi from sputum was the highest,accounting for 74.1%.The following was urine,accounting for 17.2%.The most common organisms were Candida(96.6%)among which white Candida albicans accounted for 58.6%,following by C.tropicalis(13.8%),C.parapsilosis(10.3%),C.glablate(8.6%)and C.krusei(4.3%).Drug resistance to four commonly used antifungal drugs showed drug sensitivity to amphotericin B and itraconazole was higher,while that to fluconazole and flucytosine was lower.CONCLUSIONS Significant difference of drug resistance occurs among invasive fungus species.The cross resistance to azole antifungals is existing and has a raising tendency.

OBJECTIVE To study the lower respiratory tract Acinetobacter baumannii infection in cardiac ICU and its risk factors,in order to take effective control measures. METHODS The risk factors of 5 cases respiratory A. baumannii infection in cardiac ICU of our hospital were investigated. RESULTS Patients with A. baumannii infections were concentrated,accounting for 21.7% at the same period in external cardiac ICU. According to the exposure time among children,the regional distribution and the same kinds of pathogens,the nospital acquired infection was determined as a local outbreak epidemia. The pathogenic microorganism monitoring carried out on ventilator-pipes,hands of health care workers and cardiopulmonary bypass machines etc. A. baumannii was found in tube of warming devices. CONCLUSIONS The in-door distribution and pracedures in cardiac ICU do not meet hygiene requirements,the poor sterile concept among medical staff and bad compliance of hand-washing,and the longterm use of mechanical ventilation,broad-spectrum antibiotics and immunosuppressive agents. All these factors contribute the outbreak of hospital acquired infection.

Objective_To identify the anti-HBV efficiency of AAV-IFNαby infecting HepG2.2.15 cell line, and to develop a new strategy of curing hepatitis B.Methods_Firstly,recombinant vector was packaged into AAV by three plasmids co-transfection method;then AAV-IFNαinfected HepG2.2.15 cell line, and samples were collected on the 1st, 3rd,6th and 9th day;thirdly, The time-course of HBV DNA,HBsAg and HBeAg were detected by qPCR and ELISA.The proliferation of HepG2.2.15 cells detected by MTT.Results_Recombinant AAV-IFNαcan significantly inhibit HBV replication and expression in vitro because of the proliferation of HepG2.2.15 cells inhibited by AAV6-IFNα( P<0.05) .Conclusions_AAV-IFNαis a potential antiviral product for hepatitis B.

World Health Organization Wheelchair Service Package-Intermediate Level focuses on the people who have severe difficul-ties in walking and moving around and also having poor postural control, as well as the children who have poor postural control and are un-able to sit upright independently. It includes step 1 referral and appointment;step 2 assessment;step 3 prescription (selection);step 4 fund-ing and ordering;step 5 product (wheelchair) preparation;step 6 fitting;step 7 user training;and step 8 maintenance, repairs and follow up. The physical assessment and postural support device of wheelchair service-intermediate level were emphasized. It is characterized as the standardized process, individual assessment and modular postural support device. It implies that it is important to make the assistive technol-ogy service system standardized, professional and modular.