Adolescent ; Asthma ; blood ; drug therapy ; Case-Control Studies ; Child ; Child, Preschool ; Female ; Humans ; Interleukin-17 ; blood ; Male

"Three-multi" overall evaluation system on the teaching effect of Microbiology experiment,which consisted of multi-aspect,multi-angle and multi-level,was discussed in this paper. The evaluation system showed a remarkable effect in stimulating the leaning interests of students especially.

Objective To investigate the effect of telephone follow-up on peripherally inserted central cathter(PICC) maintenance.Methods Two hundred and eighty-nine patients with PICC in our hospital from January to December 2010 served as the control group,given conventional health education on intubation,another 305 patients with PICC from January to December 2011 were set as the observation group,where telephone call follow-up was done on the basis of conventional health education on intubation. The two groups were compared in terms of timely catheter maintenance,catheter-related complications,accidental extubation and satisfaction.Result The observation group was significantly better than the control group in terms of timely catheter maintenance, catheter-related complications,accidental extubation and satisfaction (allP<0.05).Conclusion Telephone follow-up helps to improve patients compliance with PICC catheter maintenance,effectively control the complications and improve the quality of life and satisfaction degree.

Objective To observe the changes of osteoblasts and vascularization during osteogenesis by tissue engineering technique under the electron microscope and study the feasibility of improving vascularization of the tissue engineering bone by using the small intestine submucosa(SIS) as the scaffold. Methods The bone mesenchymal stem cells(BMSCs) were isolated by using the gradient centrifuge method.BMSCs were seeded in the SIS.The scaffold-cell constructs were cultured in vitro for two weeks.There were no cells on the SIS as control.They were implanted subcutaneously in the dorsa of the athymic mice.The implants were harvested after(in vivo) incubation for 4,8 and 12 weeks.The changes of osteoblasts and vascularization were observed under the transmission electron microscope and the scanning electron microscope. Results The BMSCs grew quite well.BMSCs differentiated on the surface of the SIS and secreted a great deal of extracellular matrices.The scaffold-cell constructs formed a lot of bone and vessels in vivo.The scaffold degraded after 12 weeks.No osteoblasts but vascularization and fibroblasts were observed as control. Conclusion SIS can be used as the scaffold for constructing tissue engineering bone as it can improve the formation of bone and vessels in vivo.

The methods for aptamer selection have been modified and developed in recent years. Selection efficiency has been increased due to the improvement in separation of bound and unbound nucleic acids; applicability of aptamers has been improved due to the development of primer-free SELEX and the utilization of short oligonucleotide library; more research requirements have been satisfied due to the functional modifications of aptamer selection methods. All the methodological advances enhance the potential value of aptamers in basic researches and clinical applications.

The AC impedance of human hepatoma SMMC-7721 cells were measured in our laboratory by Agilent 4294A impedance analyzer in the frequency range of 0.01-100 MHz. And then the effect of hematocrit on electrical impedance characteristics of hepatoma cells was observed by electrical impedance spectroscopy, Bode diagram, Nyquist diagram and Nichols diagram. The results showed that firstly, there is a frequency dependence, i.e., the increment of real part and the imaginary part of complex electrical impedance (δZ', δZ"), the increment of the amplitude modulus of complex electrical impedance (δ[Z *]) and phase angle (δθ) were all changed with the increasing frequency. Secondly, it showed cell volume fraction (CVF) dependence, i. e. , the increment of low-frequency limit (δZ'0, δ[Z*] 0), peak (δZ"(p), δθ(p)), area and radius (Nyquist diagram, Nichols diagram) were all increased along with the electric field frequency. Thirdly, there was the presence of two characteristic frequencies: the first characteristic frequency (f(c1)) and the second characteristic frequency (f(c2)), which were originated respectively in the polarization effects of two interfaces that the cell membrane and extracellular fluid, cell membrane and cytoplasm. A conclusion can be drawn that the electrical impedance spectroscopy is able to be used to observe the electrical characteristics of human hepatoma cells, and therefore this method can be used to investigate the electrophysiological mechanisms of liver cancer cells, and provide research tools and observation parameters, and it also has important theoretical value and potential applications for screening anticancer drugs.
Carcinoma, Hepatocellular ; Cell Line, Tumor ; Cell Membrane ; Cytoplasm ; Electric Impedance ; Electrophysiological Phenomena ; Humans ; Liver Neoplasms ; Membrane Potentials

Acupuncture Therapy ; Chest Pain ; therapy ; Female ; Humans ; Middle Aged ; Stroke ; therapy

AIM: To research the correlation factor of the anterior segment values of eyes with different axial lengths.METHODS: In this study, 697 cases 697 eyes were included.According to axial length we divided all the cases into short axial length group, normal axial length group, mild long axial length group, moderate long axial length group and severe long axial length group.The relevant indicators of the anterior segment values of patients in the five groups was comparatively analyzed.RESULTS: In the short axial length group, the anterior chamber volume (ACV) showed a significantly negative correlation with age;anterior chamber depth (ACD) showed a significantly negative correlation with age.In the normal axial length group, the ACV showed a significantly negative correlation with age and a significantly positive correlation with axial length(AXL);the anterior chamber angle (ACA) showed a significantly negative correlation with age and a significantly positive correlation with AXL, and a significantly positive correlation with corneal curvature;the ACD showed a significantly negative correlation with age and a significantly positive correlation with AXL.In the mild long axial length group, the ACV showed a significantly negative correlation with age and a significantly positive correlation with AXL, and a significantly negative correlation with corneal curvature;the ACA showed a significantly negative correlation with age and a significantly positive correlation with AXL, and a significantly positive correlation with corneal curvature;the ACD showed a significantly negative correlation with age and a significantly positive correlation with AXL.In the moderate long axial length group, the ACV showed a significantly negative correlation with age;the ACA showed a significantly positive correlation with AXL;the ACD showed a significantly positive correlation with AXL.In the severe long axial length group, the ACV showed a significantly negative correlation with age.There were no significant differences on ACV, ACA and ACD among mild long axial length group, moderate long axial length group and severe long axial length group (P>0.05), while the difference between other groups was significant (P<0.05).CONCLUSION: There has a correlation between the anterior chamber values (ACV, ACA, ACD) age and AXL for eyes which AXL were 22-27mm, while the correlation would disappear as the AXL became shorter or longer.There was a significant growth trend of anterior chamber values for eyes with AXL <27mm.

Based on the research of text (Ⅰ) which determined the fermentation medium, the fermentation condition of CNY086 including temperature, volume, inoculum and inoculum age had been studied by single factor and orthogonal experiment. The optimum temperature, liquid volume, inoculum and seed age were 15?C, 250 mL/500 mL, 15%, 10 h. Under the conditions above mentioned, enzyme activity reached 104.36 U/mL in 5 L fermentor.