Atomic force microscopy is a powerful new tool to investigate the structure and measure the relationship between structure of surfaces and functions in microorganisms. Comparing with conventional electron microscope, atomic force microscope has higher resolution and can image real-time structures from atomic to molecular scale in three-dimensional mode under physiological condition. Therefore, atomic force microscope is being used in almost every aspect of microbiology and has gotten many exciting findings.

CAS (Chrome azurol S) assay was a universal method for detecting the bacterial siderophores, and Sugar-Asn liquid medium has been applied to the studies on siderophores from Pieudomonas. In this paper, Asp has been substituted for Asn, and MSA-CAS agar plate was developed by integrating the MSA (sugar-Asp) medium and CAS bright blue dye, which has been used in the universal CAS assay. On the aspect of siderophores detection , 8 strains of 7 species from Pseudomonas had been screened on MSA-CAS agar plates and universal CAS assay respectively. The results showed that MSA-CAS agar was higher-sensitive and lower basic fluorescent than universal CAS assay.

A novel stable blue agar plate which is convenient to preparing and more effective than the universal chrome azurol sulfonate (CAS) assay established by Schwyn and Neilands was designed by replacing MM9 growth medium and pipes with certain concentrate of phosphorus buffer solution which pH could be stabled at 6.8. It is more suitable for screening over- siderophores production bacteria. Since OD_ 630 of the sample is usually out of the range of spectrophotometer with CAS assay solution when quantifying the siderophores and the outcome is not steady,the measuring wavelength had been changed to 680 nm corresponding to the middle of max absorbance and the correlation between siderophores concentrations and OD was unchanged. But the detecting sensitivity is elevated by enlarged the absorbance differences among samples with different productivity of siderophores at 680 nm .

Objective To explore the effect of pulse irrigation combined with autologous blood transfusion on inflammatory markers and thrombosis index, such as C-reactive protein (CPR), erythrocyte sedimentation rate (ESR), tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) in patients undergoing total knee arthroplasty. Methods 96 patients due to knee osteoarthritis underwent unilateral total knee arthroplasty were randomly divided into experimental group (pulse irrigation combined with autologous blood transfusion after surgery ) and control group (alone autologous blood transfusion after surgery), PT, APTT, TNF-α, IL-6, D-Dimer of two groups at different time points were detected and compared. All patients underwent lower extremity vascular ultrasound examination after operation. Results PT, APTT values were no significant different between two groups (P > 0.05), TNF-α, IL-6 values of day1 and day7 after surgery in the experimental group were lower than the control group(P < 0.05), D-Dimer values of day4 after surgery were lower than the control group (P <0.05), the incidence of deep vein thrombosis (DVT) in the experimental group was lower than the control group (P < 0.05). Conclusion Pulse irrigation combined with postoperative autologous blood transfusion in total knee arthroplasty had no influence in blood coagulation , and can reduce inflammation and the incidence of DVT than alone autologous blood transfusion,thus is beneficial to the patient recover.

Adult ; Bone Marrow Transplantation ; Fractures, Ununited ; therapy ; Humans ; Male ; Transplantation, Autologous

A bacterium strain BFHM2002 is isolated from Lake Donghu, Wuhan. BFHM2002 has advantages that it can produce melanin with a high rate and high yield in the absence of tyrosine. Induced by tyrosine, melanin yield can be dramatically increased. BFHM2002 may be identified as a new strain in Bacillus firmus, for melanin-production.

Objective To develop an online organ doses reporting software VirtualDose-IR, which can compute the radiation doses and provide an easy access to evaluation and control of patients ′radiation doses.Methods Monte Carlo method was applied to simulating various interventional radiology ( IR) processes , which included various parameters such as different patient models at different ages and with different weights , different projection angles and regions of interest , and other parameters .All of the dose data was acquired and then integrated into a database , and displayed with hyper text markup language (HTML), so only a web browser was necessary for users .Results A web-based software that reports organ doses for patients under IR progress was developed .The organ doses assessed with VirtualDose-IR were compared with other experiment and simulation data , and the results were basically consistent with each other .Conclusions VirtualDose-IR is a easy and efficient method to assess patients′radiation doses of IR.

Objective:To investigate the polymorphism of HLA-DQA1 genes in Jing nationality of Central Vietnam.Methods:Applied PCR-SSP tecnique to determine the polymorphism of the HLA-DQA1 alleles of 105 healthy children and youth,unrelated individuals in Central of Vietnam.Results:10 HLA-DQA1 alleles were detected of which DQA1*0104 were the most common allele with frequency of 21.3% and lowest frequency is DQA1*0601.Conclusion:The results indicate that HLA-DQA1 alleles polymorphism of Jing nationality in Central Vietnam is different from the other Chinese. [

OBJECTIVETo investigate the epidemiological and clinical features of calicivirus-associated diarrhea in hospitalized children in Chengdu, China in recent years.

METHODSThe clinical data of 267 children with calicivirus-associated diarrhea aged <5 years who were hospitalized in Chengdu Women and Children's Central Hospital (the only sentinel hospital for sample collection of pediatric viral diarrhea in Chengdu, Sichuan) between January 2012 and December 2014 were retrospectively studied.

RESULTSAmong the 267 children, 200 (74.9%) were aged less than 1 year. The infection rate of calicivirus was 28.4%, 21.6%, and 27.1% in 2012, 2013, and 2014, respectively. Calicivirus was prevalent in summer and autumn (August to October). The detection rate of Norovirus II was 85.8% (229/267), and 244 children (91.4%) experienced an acute clinical course. Watery stool was the most common change in stool properties (82.0%, 219 children), and some specimens showed mucus and/or blood. Most children had moderate to severe fever. One hundred and thirty-eight children (53.9%) experienced a reduced serum prealbumin level. One hundred and fifty-nine children (59.6%) experienced flora imbalance.

CONCLUSIONSCalicivirus has become one of the major pathogens for diarrhea in children aged <5 years in Chengdu, with Norovirus II as the dominant strain. Calicivirus is prevalent in summer and autumn. Infants aged <1 year are the main population affected by calicivirus-associated diarrhea, with watery stool as the most common manifestation.

Adolescent ; Caliciviridae Infections ; epidemiology ; Child ; Child, Hospitalized ; Child, Preschool ; China ; epidemiology ; Diarrhea ; epidemiology ; Female ; Humans ; Infant ; Male ; Time Factors

OBJECTIVETo evaluate the effect and acute toxicity of concurrent radio-chemotherapy, by NVB and DDP, plus concurrent radiotherapy in comparison with chemotherapy alone in the treatment of inoperable locally advanced non-small-cell lung cancer (LANSCLC).

METHODSSixty-four patients with inoperable LANSCLC were randomly divided by envelope method into two groups: concurrent radio-chemotherapy group (n = 33) and conventional chemotherapy group (n = 31). The patients in conventional chemotherapy group were treated by NP regimen (NVB + DDP): NVB 25 mg/m(2), d1, 8 and DDP 25-30 mg/m(2) d1-3. In the radio-chemotherapy group by NP regimen plus conventional radiotherapy by (60)Co: 64-68 Gy/2 Gy x 5/w x 6-7w.

RESULTSAll patients completed the treatment schedule. The overall response rate (CR + PR) in the radio-chemotherapy group was significantly higher than that in the conventional chemotherapy group: 81.8% vs 45.2%, (P < 0.01) with 1- and 2-year survival rates of 69.7% vs 38.7% (P < 0.05) and 39.4% vs 16.1% (P < 0.05). without any significant difference in the acute toxicity between two groups (P > 0.05).

CONCLUSIONCompared with conventional chemotherapy (NVP and DDP), concurrent radio-chemotherapy (NVP and DDP plus concurrent radiotherapy) is more effective and tolerable for the inoperable locally advanced non-small-cell lung cancer.

Adult ; Aged ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Carcinoma, Non-Small-Cell Lung ; drug therapy ; radiotherapy ; Cisplatin ; administration & dosage ; Combined Modality Therapy ; Female ; Humans ; Lung Neoplasms ; drug therapy ; radiotherapy ; Male ; Middle Aged ; Radiation-Sensitizing Agents ; administration & dosage ; Vinblastine ; administration & dosage ; analogs & derivatives