Objective To establish a method for determination of 3’-chloromethylacetophenone in the air of ketoprofen workplaces. Methods The 3’-chloromethylacetophenone was sampled using activated carbon tube and then desorbed by ethyl acetate. All the components were determined by gas chromatograph with FID after complete separation with FFAP capillary column. Results This method presented a linear relation within 5-1 000 ?g/ml, r value was 0.999 2. The detection limit was 1.67 mg/m3. Desorption efficiencies were 92.2%-101.5%. The break through volume of 100 mg of activated carbon was 5.0 mg. Conclusions The present method is feasible for determination of 3’-chloromethylacetophenone in workplace air.

Geographic tongue, also called benign migratory glossitis, is a common and superficial benign inflammatory disorder that affects the tongue epithelium. The majority of geographic tongue lesions typically manifest as irregular central erythematous patches. These lesions, which are caused by the loss of filiform papillae, are defined by an elevated whitish band-like border that can change location, size, and pattern over a period of time. Histological observations of the oral mucosa affected by geographic tongue revealed nonspecific inflammation. Some reports described cases of migratory stomatitis, wherein lesions simultaneously manifested on the extra lingual oral mucosa. This condition is also called ectopic geographic tongue, which is clinically and histologically similar to the type normally confined to the tongue. In most cases, patients are asymptomatic and do not require treatment. The condition may spontaneously exhibit periods of remission and exacerbation with good prognosis. The specific etiology of geographic tongue remains unknown. Geographic tongue is age-related and is prevalent among young individuals. Various etiological factors that have been suggested in literature include immunological factors, genetic factors, atopic or allergic tendency, emotional stress, tobacco consumption, hormonal disturbances, and zinc deficiency. Geographic tongue may coexist with other disorders, such as fissured tongue, psoriasis, diabetes mellitus, gastroin- testinal diseases, burning mouth syndrome, and Down syndrome. Experts currently disagree on whether geographic tongue is an oral manifestation of psoriasis. Moreover, some scholars suggest that geographic tongue is a prestage of fissured tongue. The objective of this review is to summarize current research on risk factors of geographic tongue.
Epithelium ; Female ; Glossitis, Benign Migratory ; Humans ; Mouth Mucosa ; Risk Factors ; Tongue ; Tongue, Fissured

Objective To study the expression and clinical significance of serum levels of transforming growth factor-31 (TGF-β1) and tumor necrosis factor-alpha(TNF-α) in patients with hypertensive disorder complicating pregnancy(HDCP).Methods The serum levels of TGF-β1 and TNF-αin 50 cases with HDCP and 30 cases of normal third trimester pregnant women(control group) were detected by ELISA.50 cases with HDCP were divided into gestational hypertension group,mild preeclampsia group and severe preeclampsia group according to the severity of HDCP.Results The serum levels of TGF-β1 and TNF-α in HDCP patients were significantly higher than the control group (t =13.283,13.607,all P ＜ 0.05).The serum levels of TGF-β1 and TNF-α gradually increased with the aggravating of HDCP disease,the serum levels of TGF-β1 and TNF-αwere significantly different among the three subgroups of HDCP(P ＜ 0.05).The correlation analysis showed that the serum levels of TGF-β1,TNF-α were positively correlated with the severity of HDCP (r =0.575,0.512,all P ＜ 0.05),there was significantly positive correlation between the serum TGF-β1 and TNF-α(r =0.515,P ＜0.05).Conclusion The serum levels of TGF-β1 and TNF-α were high in the HDCP patients,the high levels of TGF-β1 and TNF-α can reflect the changes and development of HDCP disease.The abnormal levels of TGF-β1 and TNF-α may be associate with dysfunction of trophoblast cell.

Hydrogen spectrum nuclear magnetic resonance (1 H-NMR ) is a commonly used method for metabolomics and has been applied in the study of liver cirrhosis and liver cancer,however,study on serum metabolites in patients with primary biliary cholangitis (PBC)is rare.Aims:To investigate the capability of 1 H-NMR for screening serum metabolites of PBC.Methods:Twenty PBC patients,20 HBV-related cirrhosis patients and 20 healthy controls were detected by 1 H-NMR.The 1 H-NMR spectra data were processed by principal component analysis (PCA)and orthogonal partial least squares-discriminant analysis (OPLS-DA)so as to create the diagnostic model.Based on the correlation coefficient P (corr),VIP value and non-paired t test of OPLS-DA model,the differential metabolites between normal group and the two cirrhosis groups were screened.Results:OPLS-DA model could effectively distinguish healthy controls and PBC patients,model interpretation ability and prediction ability were 81.9% and 44.8%,respectively (P=0.0293), glutamine,folic acid,urocanic acid,4-ethylbenzoic acid were differential metabolites.OPLS-DA model could also effectively distinguish healthy controls and HBV-related cirrhosis patients, urocanic acid, 1-methylhistamine, 1-methyladenine,glucose,L-acetylcarnitine were differential metabolites.OPLS-DA model could not effectively distinguish PBC patients and HBV-related cirrhosis patients.Conclusions:Serum glutamine and folic acid may be the potential biomarkers of PBC,which may be closely related to the immune damage mechanism and prognosis of PBC;1 H-NMR combined with OPLS-DA diagnostic model are expected to become a new method for studying liver cirrhosis.

Objective:To explore the effect of continuous nursing on the psychology and quality of life of patients with mild traumatic brain injury.Methods:A review of 120 patients with mild traumatic brain injury who were hospitalized in the Second Affiliated Hospital of Wenzhou Medical University from January 2016 to December 2019 were selected. According to the order of admission, sample numbers were drawn from the random number list and entered into groups. There were 60 cases in the control group and the intervention group. The control group received routine general nursing, and the intervention group received continuous nursing. The Hamilton Anxiety Scale (HAMA), Hamilton Depression Scale (HAMD), and Quality of Life Scale (SF-36) were used to evaluate the psychology and quality of life of patients on the day of discharge and one week, one month, and three months after discharge.Results:There was no significant difference in the scores of HAMA, HAMD and SF-36 between the two groups on the day of discharge ( P>0.05). The HAMA scores at 1 week, 1 month and 3 months after the intervention of the intervention group were (18.2±8.6), (13.7±5.8) and (5.6±2.3), which were significantly lower than those of the control group (24.2±11.2), (20.4±8.2), (8.9±3.6), the differences were statistically significant ( t values were 2.32, 3.67, 4.13, P<0.05). The HAMD scores at 1 week, 1 month and 3 months after the intervention of the intervention group were (24.3±7.1), (10.9±4.2), (6.8±2.9), which were significantly lower than those of the control group (28.6±8.5), (15.3±8.3), (14.8±4.6), the differences were statistically significant ( t values were 2.11, 2.57, 7.99, P<0.05). The SF-36 scores at 1 week, 1 month and 3 months after the intervention of the intervention group were (77.2±8.9), (85.2±9.7), (87.8±12.9), which were significantly higher than those of the control group (72.3±8.2), (79.4±10.9), (81.0±11.5), the differences were statistically significant ( t values were -2.23, -2.14, -2.13, P<0.05). Conclusions:Continuing care can be extended to the patient's family, so that the health problems faced by the patient after discharge from the hospital can be effectively solved, relieve psychological pressure and improve the quality of life, and it is worthy of clinical application.

Objective To investigate the role of quorum sensing Escherichia coli regulator C (qseC) in intestinal bacterial translocation in rats subjected to hemorrhagic shock.Methods Thirty Sprague-Dawley rats,weighing 250-300 g,were randomly divided into 5 groups (n =6 each):control group (group C),MC1000-sham shock group (group M-SS),MC1000qseC-sham shock group (group △-SS),MC1000-hemorrhagic shock group (group M-HS),and MC1000△ qseC-hemorrhagic shock group (group △-HS).The rats drank 150 μg/ml of disinfect water containing streptomycin in 3 consecutive days to inhibit the autochthonous flora in the intestinal tract.From 4th day,the rats were fed with Escherichia Coli MC1000 or MC1000△ qseC 1 ml/100 g by gastric perfusion once a day for another 3 consecutive days in the other 4 groups,while the rats were fed with normal saline instead in group C.Hemorrhagic shock was induced by blood-letting.The mesenteric lymph node (MLN),spleen and liver specimens were obtained at 24 h after operation for bacterial culture and the bacteria were identified.Bacterial translocation from gut to MLN,spleen and liver was observed and the number of bacteria in MLN,spleen and liver tissues were counted.Results The rate of bacterial translocation was significantly higher,and the number of bacterial colonies in MLN,spleen and liver tissues and the total number of bacterial colonies were significantly larger in groups M-HS and △-HS than in group C,and in group M-HS than in groups M-SS and △-SS (P ＜ 0.05).The rate of bacterial translocation was significantly lower,and the number of bacterial colonies in MLN,spleen and liver tissues and the total number of bacterial colonies were significantly smaller in group △-HS than in group MHS.Conclusion QseC is involved in the intestinal bacterial translocation following hemorrhagic shock in rats.

Objective To study the effect of epinephrine on biofilm formation of the qseC-deleted mutant of Escherichia coli on biomaterial.Methods The strains used in this study are Escherichia coli MC1000 and MC1000AqseC.LB was used for all the experiments.To determine the effect of epinephrine on motility,halos were measured in LB medium at 37℃ in the presence of epinephrine(50 μmol/L).LB with epinephrine and without epinephrine were used,and then the experiment of bacterial biofilm formation on PVC material was taken.The relative amount of biofilm was estimated.The thickness of bacterial community and bacterial community quantity in the unit area on PVC materials were measured by confocal laser scanning microscope( CLSM),and the surface structure of biofilm formation was observed by scanning electron microscope(SEM).Results The mutant strain formed less biofilm than the wild-type strain in LB.The increment in motility of wild-type strain due to epinephrine addition was shown,but mutant strain is unaffected.Similarly,biofilm formation of the wild-type strain was increased by epinephrine,but epinephrine did not affect the biofilm formation of the qseC mutant.The CLSM and SEM showed that epinephrine stimulated biofilm formation of wild-type strain on PVC materials,but had no effect on qseC-deleted mutant strain.Conclusion Epinephrine increases Escherichia coli biofilms on biomaterials through qseC.

OBJECTIVE: To explore whether femoral plasty can improve the fracture resistance of osteoporotic femoral specimens and prevent hip fracture, and to compare the difference of mechanical strength changes between two different femoral plasty methods in osteoporotic femoral specimens, so as to determine the best strengthening area of the plasty. METHODS: Eighteen pairs of fresh osteoporotic femur specimens were collected and divided into two groups, A and B, 9 pairs in each group. Nine fresh osteoporotic femur specimens in each group were randomly selected for enhancement, and the corresponding contralateral specimens were used as control group. In group A1, the enhancement areas were femoral head, femoral neck, femoral trochanter and subtrochantericregion. And in group B1, the enhancement areas were femoral head, femoral neck and femoral trochanter region. The amount of cement injected into the femoral neck was recorded and the surface temperature of the femoral neck was measured. All specimens were biomechanically tested under simulated falls. Load-displacement curves, final loads were recorded. The final energy and stiffness of specimens were calculated. The biomechanical differences between the specimens of the enhancement group and those of the corresponding control group were compared, and the mechanical changes of the specimens by two different enhancement methods were compared. RESULTS: Compared with the control group, the ultimate load and energy of the specimens in the enhanced group increased significantly, but the stiffness did not change significantly. There was no significant difference in final load and energy between specimens strengthened by two different methods. CONCLUSION Femoral plasty has the advantages of minimally invasive, simple operationand remarkable effect. It can be used as a new method to prevent osteoporotic hip fracture.
Biomechanical Phenomena ; Bone Cements ; Femur ; Femur Neck ; Hip Fractures ; Humans ; Osteoporotic Fractures

Objective: To investigate the protective effects of matrine combined with glycyrrhizic acid on chronic liver injury induced by carbon tetrachloride, and explore the protective mechanism from the points of energy metabolism and CYP enzyme.Methods: The chronic hepatic injury model of rats was induced by CCl4.The changes of activity of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) in serum were measured to observe the protective effect of the two drugs and their combination.The contents of glutamate dehydrogenase (GLDH) in serum and adenine nucleoside three phosphate (ATP), adenosine diphosphate (ADP) and adenine monophosphate (AMP) in liver tissue were determined to evaluate the regulation effect on hepatic energy metabolism and mitochondrial function.The levels of CYP1A2, CYP2E1 mRNA and protein in liver tissue were detected by real-time PCR and Western Blot to evaluate the two drugs and their combination on the regulation function of liver CYP enzyme.Results: Matrine (72.8 mg×kg-1)and glycyrrhizic acid(43.4 mg·kg-1)could decrease the serum activities of ALT and ALT in chronic hepatic injury model, and the combination (matrine 36.4 mg·kg-1+glycyrrhizic acid 21.7 mg·kg-1) had the most significant protective effect (P＜0.05).Matrine (72.8 mg·kg-1)and glycyrrhizic acid(43.4 mg·kg-1)could decrease GLDH in serum,and restore the content of ATP in liver (P＜0.05).Matrine (72.8 mg·kg-1) had no effect on the expression of CYP1A2 and CYP2E1mRNA, and glycyrrhizin (43.4 mg·kg-1) could inhibit the expression of CYP1A2, CYP2E1mRNA and protein (P＜0.05).Conclusion: Matrine combined with glycyrrhizin has obvious regulation effect on mitochondrial function and liver protective effect in chronic hepatic injury model.

OBJECTIVE: To explore biomechanical characteristics of minimally invasive different screw fixations in treating Sanders typeⅡcalcaneal fractures. METHODS: Dicom data of calcaneus by CT scan were input into Mimics 21.0 software and Ansys15.0 software to construct three-dimensional finite element digital model of calcaneus;this model was input into UG NX 10.0 software, and calcaneus was cut according to Sanders classification to establish Sanders typeⅡ calcaneus model with posterior articular surface collapse;then simulated minimally invasive screw internal fixation after calcaneal fracture:a screw from posterior articular surface was used to outside-in fix sustentaculum tali, other 4 screws were used to fix calcaneus by different methods through calcaneal tuberosity, and 4 different calcaneal models were obtained. Under the same conditions, 4 types of internal fixation models were loaded respectively, and nonlinear finite element analysis was performed to calculate the stress distribution of different internal fixation models. RESULTS: Under the same condition of loading, the model 3 had smaller displacement value, maximum calcaneus displacement value and maximum equivalent stress value of the screw than other three internal fixation models, and the stress was more dispersed. CONCLUSION In minimally invasive screw internal fixation of calcaneus fracture, after 1 sustentaculum tali screw fixation, 2 screws crossed fix posterior articular surface from calcaneal tuberosity, 2 screws fix parallelly calcaneocuboid joint from calcaneal tuberosity are more suitable for biomechanical requirements, and could provide basic theory for clinical treatment.
Bone Screws ; Calcaneus/surgery* ; Finite Element Analysis ; Fracture Fixation, Internal ; Fractures, Bone/surgery* ; Humans ; Treatment Outcome