This paper introduces a kind of evaluation method in pipetting performance on new fully automated biochemistry analyzers by experiments. The performance of sample pipetting volume is confirmed by dye dilution method, the performance of reagent pipetting volume and dummy volume is done by weighing method. Meanwhile, researches and comparative researches on dummy volumes in different conditions have been made, providing valuable reference for clinical applications of automatic biochemistry analyzers.
Automation, Laboratory ; instrumentation ; methods ; Biochemistry ; instrumentation ; methods

A strain of high-efficiency bioflocculant-producting bacteria,which was named TJ-3,was screened from sewage sludge.The strain was gram-negative and rod-shaped in physiological biochemical test and was identified as Pseudomonas aeruginosa by 16S rDNA Sequencing.According to the growth curve of the TJ-3 strain,the growth stabilization period is long so that Microbial Flocculants(MBF) production is stable.The MBF produced by the TJ-3 strain is able to flocculante kaolin suspension with 98.2%.The MBF activity distribution tests show that most of the active components of the bioflocculant exist in deposition after centrifufation.When pH is 8.5,1%(quality fraction) CaCl2 Solution dosing quantity is 3.5 mL,bioflocculant dosing quantity is 1.5 mL in 100 mL kaolin suspension,the bioflocculant has an optimal flocculation.

Objective To investigate the value of time parameters(the transit time in coronary and the half filling time in myocardium)in assessing the blood flow of ischemia myocardium through establishing canine model of acute myocardial infarction.Methods Eighteen healthy anesthetized open-chest dogs were ligated the left anterior descending(LAD),3 hours later the contrast agent(C3F8)was injected into femoral vein in a fixed velocity to perform myocardial contrast echocardiography(MCE)examination.The first perfusion and the replenishment processes were recorded by real-time tri-plane MCE(RT-TP-MCE)and real-time single-plane MCE(RT-SP-MCE)respectively.both the two different processes were analyzed by the function Y=A ×(1-e-βt)+B.RT-SP-MCE used A(plat of peak intensity)and β(slope rate of the curve)values to quantitatively calculate the myocardial blood flow(MBF=A×β).The time point of the first microbubbles coming into the left ventricle was normalized to O in RT-TP-MCE,the time point of the first microbubbles coming into the myocardium was defined as the transit time in coronary(Tc),and the time point when microbubbles in myocardium achieved the 50% plat video intensity was defined as the half filling time in myocardium(Tm).Evans blue dye and TTC staining were performed to identify normal.ischemic and infarct myocardium.Results The time parameters of the two groups-normal myocardium and ischemic myocardium from RT-TP-MCE were:Tc(10.1±1.3)s and(20.4±7.1)s(P＜0.01),Tm(17.1±2.2)s and(39.7±8.8)s(P＜0.01).There were significantly negative correlation between the time parameters(Tc,Tm)and MBF from RT-SP-MCE in ischemic myocardium(r=-0.876,P＜0.01;r2=-0.894,P＜0.01).Conclusions The first perfusion imaging with RT-TP-MCE could be used to simultaneously,quantitatively evaluate the myocardial perfusion.The lower flow,the longer transit time in coronary and half filling time in ischemic myocardium.

Objective To study the roles of micheliolide on ovarian cancer cells. Methods Firstly, human ovarian cancer cell lines HeyA8, SKOV3 and A2780/DDP were treated with different concentration of micheliolide (0.25, 0.5, 1, 2.5, 5, 10, 20, 50 μmol/L) for 72 hours, then methyl thiazolyl tetrazolium (MTT) assay was used wo detect the growth of the human ovarian cancer cell lines and the stongest inhibited cell line were selected for the following test. Secondly, after HeyA8 cell line was treated with different concentration (5, 10, 20μmol/L) of micheliolide for 24 hours, the HeyA8 cell apoptosis was measured byflow cytometry. Thirdly, the expression of RelA mRNA in HeyA8 cell was detected through real-time PCR, the expressions of nuclear factor κB(NF-κB)signal pathway related protein RelA and the activited cysteinyl aspartate specific proteinase (caspase-9) were detected by western blot analysis. Results (1) The growth of HeyA8, SKOV3 and A2780/DDP cells were all significantly inhibited after being treated with different concentration of micheliolide for 72 hours and the roles of inhibition were all concentration dependant (P<0.05). The half maximal inhibitory concentration (IC50) of HeyA8, SKOV3 and A2780/DDP were (9.8±2.2), (12.0±2.1) and (12.8±1.8)μmol/L, respectively. We chose HeyA8 cell to do the following expreriments because of its best inhibited effect. (2) After HeyA8 cell was treated with micheliolide of different concentrations, as the concentration increased (20 and 0μmol/L, for example), the apoptosis rate of HeyA8 cell raised from (7.2±1.0)%to (17.4±1.1)%, the percentage of survived cells reduce from (92.8 ± 1.3)% to (82.6 ± 1.4)%,and the relative mRNA level of RelA decreased from 1.00 ± 0.13 to 0.18 ± 0.00 (P<0.01); furthermore, the expression of RelA protein was weaken and the activited caspase-9 protein expression was increased gradually. Conclusions Micheliolide plays a significantly inhibited role in HeyA8, SKOV3 and A2780/DDP cells. The inhibited role of micheliolide inovarian cancer cells might through inhibiting nuclear factor-kappa B (NF-кB) signaling pathway, and inducing the expression of activited caspase-9 protein to promoting apoptosis of HeyA8 cell.

OBJECTIVETo explore the repair of Xiangsha Liujunzi Decoction (XSLJZD) on interstitial cells of Cajal (ICC) and gap junction (GJ) in the gastric muscular layer of rats of Pi-qi deficiency syn- drome (PQDS).

METHODSPQDS was established using purgative method with bitter and cold drugs in 30 healthy Wistar rats. After successful modeling they were randomly divided into the treatment group and the model group, 15 in each group. Another 15 healthy Wistar rats were recruited as the healthy control group. Rats in the treatment group were gastric administered with XSLJZD at 2 mL/100 g body weight, once daily for 14 successive days. Equal volume of normal saline was gastrically administered to those in the healthy control group and the model group. The gastric muscle tissues were taken out before modeling, before intervention, and after intervention, respectively. Ultrastructural changes of ICC and GJ were observed using transmission electron microscope (TEM). The number and distribution of Connexin43 (Cx43) were detected using immunohistochemistry.

RESULTSResults of TEM indicated that compared with the healthy control group, both ICC and GJ in the model group showed obvious injury. ICC and GJ were apparently repaired after intervention in the treatment group. Compared with the same group before modeling, the integrated optical density (IOD) of the Cx43 expression significantly decreased in the model group before and after intervention (P <0.05). Compared with before intervention, the IOD of the Cx43 expression significantly increased in the treatment group (P <0.05). Compared with the healthy control group, the IOD of the Cx43 expression significantly decreased in the model group before and after intervention (P <0.05). Compared with the model group, the IOD of the Cx43 expression significantly increased in the treatment group (P <0.05).

CONCLUSIONSUltrastructures of ICC and GJ in the gastric muscular layer of rats of PQDS were obviously damaged. XSLJZD could repair the structural damage of ICC and GJ in the gastric muscle tissues of rats of PQDS.

Animals ; Connexin 43 ; Drugs, Chinese Herbal ; pharmacology ; Gap Junctions ; Interstitial Cells of Cajal ; drug effects ; Leydig Cells ; Male ; Muscle, Smooth ; Qi ; Rats, Wistar ; Syndrome

OBJECTIVETo investigate how network education can improve college students' knowledge on sexual and reproductive health in Ningbo city.

METHODSFrom December 2012 to June 2013, we conducted a questionnaire investigation among college students in Ningbo city about the effects of network education on their knowledge about sexual psychology, sexual physiology, sexual ethics, and reproductive health.

RESULTSA total of 7 362 college students accomplished the investigation, of whom 2 483 (42.1% males and 57.9% females) received network education, while the other 4 879 (24.1% males and 75.9% females) did not. Approximately 47.1% of the male and 28.0% of the female students acquired sexual and reproductive knowledge via network education. Reproductive health-related network education significantly enriched the students' knowledge about the reproductive system and sex, pubertal development, sexual physiology, conception and embryonic development, methods of contraception, sexual psychology, sexually transmitted diseases and their prevention, pregnancy care and eugenics, and environment- and occupation-related reproductive health (P < 0.01). It also remarkably improved their cognitive attitude towards reproductive health knowledge (P < 0.01). Those who received reproductive health-related network education showed a significantly higher rate of masturbation (P < 0.01) but markedly later time of the first masturbation (P < 0.01) than those who did not.

CONCLUSIONNetwork education can enhance the effect of reproductive health education among college students and improve their sexual experience and health.

China ; Contraception ; Female ; Health Education ; Health Knowledge, Attitudes, Practice ; Humans ; Male ; Masturbation ; Pregnancy ; Reproduction ; Reproductive Health ; Sexual Behavior ; physiology ; psychology ; Sexually Transmitted Diseases ; Students ; Surveys and Questionnaires ; Universities

Objective To explore the influence of diabetes education carried out jointly by nurse and pharmacist on outpatients with type 2 diabetes or impaired glucose tolerance. Methods A total of 44 patients with 2 diabetes or impaired glucose tolerance were recruited. Telephone following-up or face to face interview were carried out jointly by nurses and pharmacists. The contents of diabetes education contained elementary knowledge, dietetic knowledge, physical activity knowledge, medication knowledge and so on. Results A total of 3 4 patients completed the education plan . The score of aspects of education was significantly improved by 8.89% to 44.17%. Conclusions Diabetes education performed by nurses and pharmacists can significantly improved diabetes related knowledge and the compliance of patients.

Objective To investigate the physiological and psychological health status of perimenopausal nurses to provide health care guidance to the group.Methods 220 nurses aged between 40 to 55 years old were survey with a uniformed self-designed questionnaire.Results 208 (94.55％) of valid questionnire were received,including nurses from 43 sections in the hospital.The incidence of perimenopausal syndrome is 65.87％.The incidence of gynecological diseases,breast diseases,negative emotions and chronic diseases are 43.27％,48.07％,31.25％ and 29.33％ respectively. There are significant difference in negative emotions between nurses working at department of internal medicine and surgical medicine (23.55％ vs 7.69％ ;x2 =4.559,P＜0.05 ) ; No significant difference was found between nurses working at the outpatient and in-patient departments.46 (22.12％) nurses face at least one social factor (such as economics,family,and marriage) that may interfere with the emotion.However,there was no evidence to show that the above factors have a significant direct correlation with the negative emotions (P =0.1913).30.77％,14.29％ and 6.67％ of nurses with chronic diseases such as hypertension,diabetes and osteoporosis respectively accepted medical treatment.Conclusions Perimenopausal nurses face physical,psychological (emotional) and social pressures.Health education,reasonable rotations and psychological intervention should be applied to improve the physical and mental health of the perimenopausal nurses.

OBJECTIVETo investigate the effect of chemically synthetic small interfering RNA (siRNA) targeting connective tissue growth factor (CTGF) on the synthesis and secretion of extracellular matrix (ECM) in hepatic stellate cells (HSC).

METHODSChemically synthetic siRNA targeting CTGF was transfected into HSC T6 (an active HSC line in rats) by oligofectamine package, and untreated HSC T6 were used as control. Total RNA and protein of the cells, after their incubation with siRNA for 24, 48 and 72 hours, were extracted, and the supernatants were collected. The expressions of CTGF and type I and III collagen genes were detected by means of reverse transcription-polymerase chain reaction (RT-PCR) and/or Western blot. Contents of hyaluronic acid and type III pro-collagen in the supernatants were determined by radioimmunoassay.

RESULTSThe expression of CTGF at mRNA and protein level and type I and III collagen at mRNA levels were markedly down-regulated in siRNA-transfected HSCs. The contents of hyaluronic acid and type III pro-collagen in the supernatants decreased by 46%+/-7%, 52%+/-7%, 53%+/-7% and 29%+/-18%, 29%+/-7%, 27%+/-5%, compared with those of the blank control at 24, 48 and 72 hours.

CONCLUSIONSChemically synthetic anti-CTGF siRNA can significantly inhibit CTGF gene expression in HSC, and markedly reduce the synthesis and secretion of ECM including type I and III collagen and hyaluronic acid. The siRNA-directed suppression of CTGF gene in HSC was maintained for 72 hours. This suggests that chemically synthetic siRNA may be a potential in preventing and treating liver fibrosis and may have a promising future for development

Cell Line ; Connective Tissue Growth Factor ; Extracellular Matrix ; metabolism ; Gene Targeting ; Humans ; Immediate-Early Proteins ; genetics ; Intercellular Signaling Peptides and Proteins ; genetics ; Liver ; cytology ; metabolism ; RNA, Small Interfering ; genetics

OBJECTIVETo investigate the effects of small interfering RNA targeting connective tissue growth factor (CTGF) on rat transforming growth factor beta (TGF beta)/Smads signal pathway.

METHODSChemically synthetic siRNA targeting CTGF was transfected into HSC T6 and then they were injected into rat livers through their intraportal veins. At the same time these rats also received CCl4 subcutaneously every three days for 6 consecutive weeks. Untreated HSC T6 or/and rats with random siRNA treatment served as controls. Total RNA or/and protein in HSC T6 and rat hepatic tissues were extracted. The expressions of CTGF and TGF beta 1, Smad2, 3 and 7 genes were detected by reverse transcription-polymerase chain reaction (RT-PCR) and/or Western blot.

RESULTSCTGF siRNA significantly reduced the expression of CTGF protein in HSC T6. At 48 h after CTGF siRNA treatment, the down-regulation of CTGF protein was the most significant, up to 94%+/-4% (t=46.196, P less than 0.01), but the expressions of TGF beta 1, Smad2, 3 and 7 mRNA showed no differences in HSC T6 compared with the blank controls. Six weeks after CCl4 injections, prominent up-regulations were observed in the gene expressions of CTGF and TGF beta 1 in saline control or siRNA-treated rat livers. Administering CTGF siRNA for six weeks markedly attenuated the induction of CTGF and TGF beta 1 genes; the expressions of CTGF and TGF beta 1 protein decreased by 95%+/-2% (F=21.234, P less than 0.01) and 74%+/-8% (F=13.464, P less than 0.05), respectively, whereas Smad2, 7 protein expressions were not affected.

CONCLUSIONSilencing the CTGF gene can suppress the TGF beta /Smads signal pathway in rat livers.

Animals ; Connective Tissue Growth Factor ; metabolism ; Gene Silencing ; Male ; RNA, Messenger ; genetics ; RNA, Small Interfering ; Rats ; Rats, Sprague-Dawley ; Signal Transduction ; Smad Proteins ; metabolism ; Transfection ; Transforming Growth Factor beta ; metabolism