The brown slime inside pipeline of the polluted mineral waters well was analyzed. It was confirmed that the brown slime was a biofilm formed mainly by growth of bacteria contaminant, using microscope analysis. After treated with HCl, the brown crystals and mycelioid matter presented in slimes disappeared. It was verified these were metal deposits. The samples produced Prussia blue deposits by dropping K 4Fe(CN) 6 and HCl, which proved that the metal deposits were iron compound. Also it was believed the biofilm was produced by growth of iron bacteria, mixed with deposits of iron compound. The iron bacteria have been isolated from the slimes and cultured in the laboratory. The colony on agar plate also produced Prussia blue deposits after treated with K 4Fe(CN) 6 and HCl. The cells form of pure culture was the same as that in the samples by electronmicroscope analysis. Therefore, It indicated that the bacteria on biofilm inside pipeline were iron bacteria mainly.

Adult ; Female ; Health Knowledge, Attitudes, Practice ; Health Promotion ; Humans ; Lead ; Male ; Middle Aged ; Occupational Exposure ; prevention & control ; Occupational Health ; Occupational Health Services ; Stearates ; Young Adult

Objective: To study the effect of moist therapy on dermal radio lesions. Methods:13 located dermal radio lesions about Ⅲ-Ⅳ stage from 12 cases were treated with moist therapy. Wound managing steps for each time: The first step was to measure the size of wounds and take photos, and then evaluate individual pain level by a numeric pain scale. The second step was to assess and analyze the factors affecting wounds healing, including nutrition, sleeping, activity, psychological condition. After that the individualized plans about nutrition, activity, and psychological care were made. While exchanging dressings, the implementation and effects of the plans must be evaluated and adjusted. The mechanical debridement combined with autolyzing debridement was used for wounds managing. Then the wounds were saturated with bFGF and normal saline, and wetly covered with occlusive dressings. Wounds were managed every two days until wounds healed. Results: All 13 wounds were cured. The average healing time was (10?6)d and the average cost was (202?48)yuan. The pain level after moist therapy was significantly lowered than before(P

Objective To study the influence of carboxymethyl-chitosan(CM-chitosan)on chondro- cyte apoptosis induced by recombinant human interleukin-1?(rhIL-1?)and explore its mechanism.Methods Rabbit chondrocytes were isolated and cultured.Chondrocytes were pretreated with different concentrations of CM-chitosan for 1 h,then 10 ng/ml IL-1?were added into the culture medium.After 24 h,the apoptotic rates of chondrocytes were measured by flow cytometry with AnnexinⅤ-FITC and PI staining.The morphology of nuclei was observed by fluorescent microscopy with Hoechst 33342 staining.The mitochondrial membrane po- tentials were tested by confocal laser scanning microsocopy with Rhodamine-123 and ATP contents were mea- sured by luciferase reaction.Results CM-chitosan could inhibit chondrocyte apoptosis and restore the func- tion of mitochondria induced by IL-113 in a dose-dependent manner.Conclusion CM-ehitosan can inhibit chondrocyte apoptosis by protecting mitochondrial function.

Objective: To investigate the effects of Yiguanjian Decoction, a compound traditional Chinese herbal medicine, on collagen metabolism of hepatic tissues in rats with carbon tetrachloride (CCl(4))-induced liver fibrosis. Methods: Liver fibrosis was induced in rats by intraperitoneal injection of 50% CCl(4)-olive oil solution at a dose of 1 mL/kg body weight, twice per week for 9 consecutive weeks. Six rats were sacrificed for dynamic observation at the end of the 3rd and 6th week respectively, and the other rats were divided into 9-week untreated group and Yiguanjian Decoction group which was given Yiguanjian Decoction intragastrically in the subsequent 3-week modeling period. Another 6 rats were used as normal group. Rats in the normal group and 9-week untreated group were treated with distilled water. At the end of the 9th week, all rats were sacrificed, and their blood serum and liver tissue were collected for measuring hepatic histology and expressions of α-smooth muscle actin (α-SMA), tissue inhibitor of metalloproteinase (TIMP)-1, TIMP-2, matrix metalloproteinase (MMP)-13, MMP-14, collagen type I (Col I), and activities of MMP-2 and -9. Results: Compared with the normal group, collagen fiber deposition, expressions of α-SMA, Col I, TIMP-1, TIMP-2, MMP-13 and MMP-14 and activities of MMP-2 and -9 in the liver tissues gradually increased in the untreated group (P<0.05, P<0.01). These changes were significantly suppressed by Yiguanjian Decoction. Conclusion: Yiguanjian Decoction exerts inhibition on formation of CCl(4)-induced cirrhosis in rats. The therapeutic mechanism may be related to inhibiting hepatic stellate cell activation, collagen secretion, and promoting collagen fiber degradation.

Norovirus ; chemistry ; Receptors, Virus ; physiology ; Viral Structural Proteins ; chemistry ; immunology ; Viral Vaccines ; immunology

Objective To explore the effect of timeliness motivation theory-based continuing care on the self-care ability and healthy behavior in elderly patients with type 2 diabetes. Methods A total of 202 elderly patients with type 2 diabetes in our hospital were selected,and were randomly divided into observation group and control group according to the random number table, with 101 cases in each group. The control group were given healthy related education during hospitalization , and post-discharge telephone follow-up every month, lasting 10~15min each time.The observation group were additionally given timeliness motivation theory-based continuing care by telephone follow-up each month , including emotional arousal , need motivation , examples stimulating and benefit motivation, lasting 6 months. Their self-care ability and healthy behavior in the two groups were compared. Result The self-care ability in the observation group was significantly significantly better than that of the control group (P<0.001), and had significantly much more healthy behaviors than the latter (P < 0.001). Conclusion Timeliness motivation theory-based continuing care can improve the self-care ability and healthy behavior in elderly patients with type 2 diabetes.

Objective To evaluate the relationship between recurrent intussusception and enlarged mesenteric lymph nodes (EMLNs) in children by ultrasound.Methods A total of 35 cases (a total of 75 relapse) with imaging features of recurrent intussusception were retrospectively analysed.The sequence,size,number,morphology and location of EMLNs were recorded.Results Twenty cases of EMLNs were found in 35 cases recurrent intussusception (57.1%,20/35).At least three EMLNs were found in and / or around the mesentery of intussusception.The imaging feature of recurrent intussusception was a " target" appearance on transverse scans and a "sleeve" sign on longitudinal scans .All the EMLNs were smooth and oval-shaped hypoechoic nodule.The largest longitudinal diameter of the EMLNs ranged between 7-20 mm ,the largest transverse diameter of the EMLNs ranged between 3-8 mm with the aspect ratio≥2.0.Conclusion The Enlarged mesenteric lymph node recurrence of intussusception in children is crucial factor.Ultrasound can not only accurately and timely diagnose and treat intussusception while scanning enlarged mesenteric lymph nodes,which can provide an important basis for reducing the recurrence of intussusception.

Abstract: Objective　To investigate the relationship between the body mass index (BMI) levels and the negative conversion time of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleic acid in adult coronavirus disease 2019 (COVID-19) patients and the asymptomatic persons. Methods　Asymptomatic infected patients and confirmed COVID-19 patients admitted to Chengdu Public Health Clinic Center from February 2021 to November 2021 were dynamically included. The epidemiological and clinical characteristics of the objects were collected, and the SARS-CoV-2 nucleic acid testing of the objects during their hospitalization was continuously monitored, and the negative nucleic acid conversion time was recorded. The t test or Wilcoxon rank sum test, χ2 test or Fisher's exact probability method examine were used to distribute characteristics of each group of variables and the connection between different variables, respectively. Then the variables showed differences in distribution (P<0.05) between different BMI groups were included in the multivariate Cox proportional risk regression model. Results　A total of 253 subjects ranged from 18 to 63 years old, with M(P25, P75) age of 37.0 (30.0, 47.0) years old, were included in this study. The male to female ratio was 4.16 to 1. The BMI was (23.97±3.33) kg/m2. 50.59% (128/253) of the objects were overweight or obese, and 78.13% (100/128) were overweight. The negative time of SARS-CoV-2 nucleic acid conversion of all subjects ranged from 1 to 71 days, with M(P25, P75) of 7.0 (2.0, 18.0) days (P<0.001). The negative time of SARS-CoV-2 nucleic acid conversion of the normal weight or the thin, and the overweight or obese were 5.00 (2.00, 19.00) and 8.00 (2.00, 17.75) days respectively. The results of multivariate Cox's proportional hazards regression model showed that the BMI levels may not be associated with the negative conversion time of SARS-CoV-2 nucleic acid (HR=1.090, 95%CI: 0.843-1.410, P=0.510). Conclusions　Adult asymptomatic persons and confirmed COVID-19 patients are mainly middle-aged and young males, and overweight or obesity is relatively common. Overweight or obesity cannot be considered as an independent factor influencing the negative conversion time of SARS-CoV-2 nucleic acid.

AIMTo compare the effects of the non-mitogenetic human acidic fibroblast growth factor (nmhaFGF) and the human acidic fibroblast growth factor (haFGF) on the proliferation and MAPK signal transduction pathway of the malignant tumor cell and to study the clinical safety of nmhaFGF.

METHODSThe mammary tumor cells (MCF-7) were treated with haFGF and nmhaFGF separately. The mitogenic activities of both haFGF and nmhaFGF were detected by MTT method and the cell cycle was analyzed by flow cytometer (FCM). The expression levels of the signal proteins, Grb2 (growth factor receptor bound 2) and ERK1/2 (extracellular signal-regulated kinase 1/2), were detected by semi-quantitative Western blotting method.

RESULTSThe mitogenic activity of nmhaFGF was obviously lower than that of haFGF. The activity of nmhaFGF was weaker than that of the haFGF. The ratio of G1/G0, G2/M of haFGF was markedly lower than that of nmhaFGF and control group, and was reverse in S phase. The expression levels of both Grb2 and ERK1/2 of the nmhaFGF treated group were lower than that of the haFGF treated group and approaching the control group.

CONCLUSIONThe mitogenic activity of the nmhaFGF decreased remarkably. Its mechanism probably via down-regulation of the expression of the signal moleculars, MAPK-ERK1/2 and Grb2.

Breast Neoplasms ; metabolism ; pathology ; Cell Cycle ; drug effects ; Cell Line, Tumor ; Down-Regulation ; Female ; Fibroblast Growth Factor 1 ; genetics ; pharmacology ; GRB2 Adaptor Protein ; metabolism ; Humans ; Mitogen-Activated Protein Kinase 1 ; metabolism ; Mitogen-Activated Protein Kinase 3 ; metabolism ; Mitosis ; drug effects ; Mutation