Objective This study analyzed the chemical structures of two unknown substances in e-liquid using methods such as nuclear magnetic resonance(NMR),infrared spectroscopy(IR),and mass spectrometry(MS).Methods After separating,purifying,and freeze-drying two suspicious substances from e-liquid,GC-MS analysis was used to obtain the mass spectrum characteristic ion fragments and fragmentation patterns of unknown compounds.The precise mass numbers were measured by high-resolution mass spectrometry,and proton numbers and their assignments,carbon types,and fluorine atom numbers and positions were obtained by combining 1HNMR,13CNMR,and 19FNMR.The functional groups were then analyzed by infrared spectroscopy.Results Through data analysis,the molecular formulas of the two suspicious substances are C13H13FN2O2 and C14H15FN2O2,respectively.Their structures were determined to be etomidate derivatives:1-(o-fluoromethylphenyl)imidazole-5-carboxylic acid methyl ester and 1-(o-fluoromethylphenyl)imidazole-5-carboxylic acid ethyl ester.Conclusion The structural data of two substances obtained in this study in terms of mass spectrometry,nuclear magnetic resonance,and infrared spectroscopy provide support for combating crimes involving the two substances,and provide reference for the regulation and detection of the two drugs.

Objective This study analyzed the chemical structures of two unknown substances in e-liquid using methods such as nuclear magnetic resonance(NMR),infrared spectroscopy(IR),and mass spectrometry(MS).Methods After separating,purifying,and freeze-drying two suspicious substances from e-liquid,GC-MS analysis was used to obtain the mass spectrum characteristic ion fragments and fragmentation patterns of unknown compounds.The precise mass numbers were measured by high-resolution mass spectrometry,and proton numbers and their assignments,carbon types,and fluorine atom numbers and positions were obtained by combining 1HNMR,13CNMR,and 19FNMR.The functional groups were then analyzed by infrared spectroscopy.Results Through data analysis,the molecular formulas of the two suspicious substances are C13H13FN2O2 and C14H15FN2O2,respectively.Their structures were determined to be etomidate derivatives:1-(o-fluoromethylphenyl)imidazole-5-carboxylic acid methyl ester and 1-(o-fluoromethylphenyl)imidazole-5-carboxylic acid ethyl ester.Conclusion The structural data of two substances obtained in this study in terms of mass spectrometry,nuclear magnetic resonance,and infrared spectroscopy provide support for combating crimes involving the two substances,and provide reference for the regulation and detection of the two drugs.

Objective To evaluate the degree of brain atrophy in spinocerebellar ataxia type 3(SCA3)patients based on artificial intelligence(AI)technology,and to explore the correlation between the degree of brain atrophy and the severity of the disease.Methods The clinical and imaging data of 23 SCA3 patients(SCA3 group)and 24 healthy controls(HC)(HC group)were collected.The International Cooperative Ataxia Rating Scale(ICARS)was used to evaluate the severity of ataxia in patients with SCA3.AI technology was used to process the 3D-T1 WI MR image data of the SCA3 and HC groups to segment and measure the volume and volume percentage of brain,followed by correlation analyses between brain structural alterations and the severity of ataxia in SCA3 patients.Results There were no significant differences in gender and age between the two groups(P＞0.05).The SCA3 group had a significant reduction in the volume and volume percentage of various brain regions,such as the frontal,temporal,parietal,occipital,limbic,right cerebral white mat-ter,subcortical gray matter,cerebellum and brainstem,compared to the HC group(multiple hypothesis testing adjusted P＜0.01).In the SCA3 group,the ICARS showed positive correlation with patient age(r=0.571,P=0.004)and negative correlation with the vol-ume of the left cerebellar white matter,vermis,medulla oblongata,and the volume percentages of bilateral cerebellar white matter,vermis,pons,medulla oblongata(P＜0.05).Conclusion The significant atrophy of the supratentorial and subtentorial regions of the brain in SCA3 patients.The globus pallidus exhibits the most substantial atrophy,suggesting its potential as an imaging diagnostic marker of SC A3.

To establish an injectable hydrogel containing Prussian blue (PB) nanospheres for photothermal therapy against cancer, PB nanospheres were prepared by one-pot synthesis and the thermosensitive Pluronic F127 was used as the hydrogel matrix. The PB nanospheres and the hydrogel were characterized by shape, particle size, serum stability, photothermal performance upon repeated 808 nm laser irradiation, as well as the rheological features. The effect of the PB nanospheres and the hydrogel were evaluated qualitatively and quantitatively in 4T1 mouse breast cancer cells. The retention, photothermal efficacy, therapeutic effects and systemic toxicity of the hydrogel were assessed in a tumor-bearing mouse model. The PB nanospheres had a diameter of about 150 nm and exhibited satisfactory serum stability, photo-heat convert ability and repeated laser exposure stability. The hydrogel encapsulation did not negatively influence the above features of the photothermal agent. The nanosphere-containing hydrogel showed a phase transition at body temperature and, as a result, a long retention time . The photothermal agent-embedded hydrogel displayed promising photothermal therapeutic effects in the tumor-bearing mouse model with little-to-no systemic toxicity after peritumoral administration.

Objective To compare the differences and clinical value of prognostic evaluation between American Joint Committee on Cancer (AJCC) TNM staging system 7th edition and 8th edition for gastric cancer (GC).Methods The retrospective case-control study was conducted.The clinicopathological data of 1 383 GC patients who were admitted to the First People's Hospital of Changzhou between January 2008 and August 2012 were collected.Distal gastrectomy,proximal gastrectomy + pyloroplasty or total gastrectomy were performed according to preoperative evaluation and intraoperative exploration.Observation indicators:(1) surgical and postoperative situations;(2) follow-up and survival situations;(3) T staging comparison between AJCC TNM staging system 7th edition and 8th edition;(4) N staging comparison of AJCC TNM staging system 8th edition;(5) prognostic analysis in N staging of AJCC TNM staging system 8th edition;(6) TNM staging comparison between AJCC TNM staging system 7th edition and 8th edition;(7) prognostic analysis in different TNM staging between AJCC TNM staging system 7th edition and 8th edition.Follow-up using outpatient examination and telephone interview was performed to detect postoperative survival up to October 2017.Measurement data with normal distribution were represented as x ± s.Measurement data with skewed distribution were described as M (range).The survival curve and survival rate were respectively drawn and calculated by the Kaplan-Meier method,and the Log-rank test was used for survival analysis.Results (1) Surgical and postoperative situations:1 383 GC patients underwent successful radical gastrectomy,including 923 with distal gastrectomy,165 with proximal gastrectomy and 295 with total gastrectomy.Of 1 383 patients,115 with postoperative complications were improved by symptomatic treatment,including 87 with surgical complications and 28 with non-surgical complications.Postoperative pathological examinations:total number of intraoperative lymph node dissection and number of lymph node metastasis were 25± 12 and 7±4;577 didn't have lymph node metastasis and 806 had regional lymph node metastasis;308 were in early GC and 1 075 in advanced GC.(2) Follow-up and survival situations:1 383 patients were followed up for 1-117 months,with a median time of 34 months.The 1-,3-and 5-year survival rates of 1 383 patients were respectively 90.5％,71.9％ and 61.1％.(3) T staging comparison between AJCC TNM staging system 7th edition and 8th edition:T staging definition between AJCC TNM staging system 7th edition and 8th edition was identical.T staging of 1 383 patients:308,192,65,628 and 190 were respectively detected in T1,T2,T3,T4a and T4b stagings.(4) N staging comparison between AJCC TNM staging system 7th edition and 8th edition:N staging definition between AJCC TNM staging system 7th edition and 8th edition was identical.N staging of 1 383 patients:577,255,207,230 and 114 were respectively detected in N0,N1,N2,N3a and N3b stagings.N3a and N3b were classified as N3 staging of AJCC TNM staging system 7thedition,but they were classified as independent staging of AJCC TNM staging system 8th edition.(5) Prognostic analysis in N staging of AJCC TNM staging system 8th edition:5-year survival rate of patients in N0,N1,N2,N3a and N3b stagings was respectively 85.6％,76.5％,59.4％,45.2％ and 32.5％ based on AJCC TNM staging system 8th edition,with a statistically significant difference in survival (x2 =394.400,P＜0.05).There was a statistically significant difference between N0 and N 1 stagings (x2 =45.630,P＜0.05),between N 1 and N2 stagings (x2 =19.470,P＜0.05),between N2 and N3a stagings (x2 =7.602,P＜0.05) and between N3a and N3b stagings (x2=13.020,P＜0.05).(6) TNM staging comparison between AJCC TNM staging system 7th edition and 8th edition:TNM staging of 366 patients had changes,including 2 in T1N3b staging,2 in T2N3b staging,18 in T3N3b staging,120 in T4aN2 staging,149 in T4aN3a staging,34 in T4bN0 staging and 41 in T4bN2 staging;364 were detected in staging Ⅲ in 7th edition and 8th edition,and sub-staging of staging Ⅲ had a change;2 in T1N3b of ⅡB staging were redistricted into Ⅲ B staging based on AJCC TNM staging system 8th edition.(7) Prognostic analysis in different TNM staging between AJCC TNM staging system 7th edition and 8th edition:according to 7th edition,cases and 5-year survival rate were respectively 247,89.5％ in Ⅰ A staging and 147,83.7％ in Ⅰ B staging and 77,75.9％ in ⅡA staging and 207,70.5％ in ⅡB staging and 136,61.0％ in ⅢA staging and 236,37.5％ in Ⅲ B staging and 333,35.4％ in Ⅲ C staging,with a statistically significant difference in survival among sub-stagings (x2 =228.800,P＜0.05).There was a statistically significant difference in survival among Ⅰ,Ⅱ and Ⅲ stagings (x2=189.000,P＜0.05) and between ⅢA and ⅢB or ⅢC stagings (x2=22.710,18.010,P＜0.05).There was no statistically significant difference in survival between Ⅰ A and Ⅰ B stagings (x2=0.179,P＞0.05),between Ⅱ A and Ⅱ B stagings (x2 =0.265,P＞0.05),and between Ⅲ B and Ⅲ C stagings (x2 =1.550,P＞0.05).According to 8th edition,cases and 5-year survival rate were respectively 247,89.5％ in Ⅰ A staging and 147,83.7％ in Ⅰ B staging and 77,75.9％ in Ⅱ A staging and 205,70.7％ in Ⅱ B staging and 288,53.8％ in ⅢA staging and 258,37.3％ in ⅢB staging and 161,28.5％ in ⅢC staging,with a statistically significant difference in survival among sub-stagings (x2=234.900,P ＜ 0.05).There was no statistically significant difference in survival between Ⅰ A and Ⅰ B stagings (x2 =0.179,P＞0.05) and between Ⅱ A and ⅡB stagings (x2 =0.564,P＞0.05).There was statistically significant differences in survival between Ⅲ A and Ⅲ B or ⅢC stagings (x2 =29.790,43.060,P＜0.05) and between Ⅲ B and Ⅲ C stagings (x2 =7.494,P＜0.05).Further analysis showed that changes of TNM staging system between 7th edition and 8th edition were in T3N3b,T4aN2,T4aN3a,T4bN0 and T4bN2 stagings,5-year survival rate in above stagings was respectively 16.7％,35.8％,30.2％,47.1％ and 26.8％,with statistically significant differences in survival between T3N3b and T4aN2,T4aN3a,T4bN0 and T4bN2 stagings (x2 =19.590,8.039,12.070,3.853,P＜0.05),between T4aN2 and T4aN3a,T4bN2 stagings (x2 =6.529,3.859,P ＜ 0.05),between T4aN3a and T4bN0 stagings (x2 =10.400,P＜0.05) and between T4bN0 and T4bN2 stagings (x2=4.636,P＜0.05).There was no statistically significant difference in survival between T4aN2 and T4bN0 stagings (x2 =3.607,P＞0.05) and between T4aN3a and T4bN2 stagings (x2 =0.029,P＞0.05).Conclusions Compared with AJCC TNM staging system 7th edition,N3a and N3b stagings are classified as independent staging in AJCC TNM staging system 8th edition,and 8th edition is more accurate in prognostic evaluation of GC patients in stage Ⅲ.

Objective To evaluate the outcomes of thumb reconstruction with dorsal thumb rotated single pedicel reverse island flap.Methods 49 thumb-tip defects cases with dorsal thumb rotated single pedicel reverse island flap were analyzed retrospectively.37 dorsal thumb reverse island flap were performed,and 12 ulnar-dorsal reverse island flaps were performed.Results The operation time was 40-60 minutes.The mean time was 45 minutes.All 49 cases survived completely.The color of the flaps was purple,and blisters in the surface of the flaps after 1-2 days in 2 cases.After took out stitches partly,the blisters were dried and crusted,the color of the flaps with better blood circulation was normal.The follow-up period was 3-24 months,all thumbs had satisfactory appearances and functions.The two-point discrimination was 6-9mm in flaps inosculated with nerve,that was 8-10 mm in flaps inosculated without nerve.The color,texture and elasticity of flaps were excellent,and the donor sites had not been defected.Conclusion Dorsal thumb rotated single pedicel reverse island flap is a reliable option to restore function as well as appearance,long vascular pedicle with skin strap,wide rotation angle,high rate of survival.It avoided damages to the well-known arteries and nerves.It is a relatively facile procedure that can be applied toward resurfacing thumb tip defects.

Objective:To explore the methods and ideas for developing pharmaceutical care in clinical practice. Methods: The pharmaceutical care performed by clinical pharmacists and the therapeutic scheme assisted by clinical pharmacists for one patient with adult purulent meningitis were analyzed retrospectively. Results and Conclusion:Through selection of anti-infective agents, treatment of adverse drug reactions and assessment of patients’ economic capacity,clinical pharmacists help provide reasonable medication to im-prove therapeutic efficacy, safety and economy.

Objective: To explore the peri-operative application of GLP-1 analogue and insulin on myocardial perfusion and clinical prognosis in patients of acute ST segment elevation myocardial infarction (STEMI) with stress-induced hyperglycemia. Methods: Our research was a prospective single center randomized control study. A total of 114 consecutive STEMI patients received percutaneous coronary intervention (PCI) within 12h of onset were enrolled, the patients had no diabetes while blood glucose ≥11.1mmol/L at immediate admission. Based on random number table, the patients were divided into 2 groups: Observation group, the patients received GLP-1 analogue, n=59 and Control group, the patients received insulin, n=55. The post-operative myocardial perfusion, indicators of myocardial damage and cardiac function, myocardial infarct area (MIA) and myocardial salvage index (MSI) were compared between 2 groups. The patients were followed-up for 6 months to record the incidence of major adverse cardiovascular events (MACE). Results: At peri-operative period, compared with Control group, Observation group had decreased peak values of creatine kinase isoenzyme (CK-MB) and troponin T (cTnT), P<0.05. At 6 months post-operation, compared with Control group, Observation group showed increased myocardial perfusion and left ventricular ejection fraction (LVEF), P<0.05, reduced MIA (15±12) g vs (20±14) g, P<0.05 and 12% elevated MSI as (0.64±0.13) vs (0.56±0.12), P<0.001. The MACE incidence was similar between 2 groups, P=0.217. Conclusion: In STEMI patients with stress-induced hyperglycemia, peri-operative application of GLP-1 analogue may safely regulate blood glucose, improve cardiac perfusion and function, reduce MIA; while it had no influence on myocardial perfusion at peri-operative period and no impact on MACE occurrence at 6 months post-operation.

OBJECTIVE: To analyze the sexual behavior characteristics of the sexually transmitted HIV-positive people and to estimate the secondary transmission rate.
 METHODS: Field investigation and literature review were conducted among sexually transmitted HIV-positive people to collect general information during the last 6 months before notification of HIV infection. A mathematical model was used to estimate the secondary transmission rate.
 RESULTS: A total of 769 HIV-positive people were recruited for the study, 186 of them were women, 286 were men who have sex with women (MSW), 242 were men who have sex with men (MSM) and 55 were men who have sex with men and women (MSMW). During 6 months, the average sex partner among these 4 groups were 2.29, 1.61, 3.32 and 4.10, respectively; the sexual behavior frequency were 26.03, 20.97, 14.77 and 25.51, respectively; the rates of non-use of condom were 74.14%, 73.53%, 59.60% and 72.06%, respectively; the secondary transmission rate were 0.0095, 0.0151, 0.1759 and 0.1985, respectively. Under constant conditions of other factors, the secondary transmission rates decreased by 30.13%-82.00%, 23.00%-49.51%, and 16.10%-19.09%, respectively, if there was a reduction in 1 sex partner, 1 time/month for the sexual frequency and 20% of rate for non-use of condom.
 CONCLUSION The HIV secondary transmission from MSMW HIV-positive people to general population was the highest. Change in sexual behavior of the HIV-positive people can decrease the HIV secondary transmission rate significantly.
Female ; HIV Infections ; Humans ; Male ; Models, Theoretical ; Sexual Behavior ; Sexual Partners

Objective To explore the relationship between the immune function of cellin peripheral blood with the virureplication and hepatitiviru(HCV)-cAg expression in the patientwith chronihepatiti(CHC) .MethodPeripheral blood lymphocytesubpopulation ,HCV-Rnand HCV core antigen (HCV-cAg) in 63 healthy people undergoing the physical exami-nation (control group) and 85 caseof CHC(Chgroup) were analyzed by the flow cytometry ,real-time Pcand ELIS,respec-tively .ResultThe percentageof total cell,T4 cell,T8 cell,double negative cell(DN) and double positive cell(DP) in the Chgroup were (67 .37 ± 10 .43)% ,(37 .11 ± 10 .28)% ,(21 .63 ± 8 .87)% ,(7 .80 ± 4 .57)% and (0 .20 ± 0 .29)% , respectively ,the absolute contentwere in turn (0 .70 ± 0 .44) × 109/L ,(0 .37 ± 0 .22) × 109/L ,(0 .22 ± 0 .17) × 109/L ,(0 .08 ± 0.06)×109/Land(0.19±0.68)×107/L,respectively.TheratioofT4/T8was(2.18±1.26)% .Theresultsindicatedthatthe percentage of T8 cellin the Chpatientwadecreased obviously (P＜0 .01) ,which resulted in the ratio of T4/T8 raising(P＜0 .05);meanwhile ,the absolute contentof the total cell,T4 cell,T8 celland Dnwere all decreased obviously (P＜0 .05);moreove,the percentage of T4 celland Dnin the patientwith HCV-Rnpositive and HCV-cAg positive wasignificantly in-creased (P＜0 .05) .Conclusion When HCV replicating in the patientwith CHC,the T lymphocyte subpopulation haobviouab-normity .The low immune function or immune tolerance ofT cells may be the important cause of recurrence and uncurability of CHC.