Objective To investigate the present situation of water benzo (a) pyrene contamination in China and to make an ecological risk assessment. Methods B(a)P, one of the 16 prior-controlled polycyclic aromatic hydrocarbons pollutants selected by US EPA, is used to reflect the potential risk of PAHs, a strong carcinogen. Since the content of B(a)P in water is rather low, the contamination levels in the sediment of domestic water environment are assessed with two ecological assessment standards: risk assessment guidelines of chemical concentrations in marine and estuary sediments and sediment quality guidelines for the protection of aquatic life and probable effects levels for adverse biological effects. Results The contents of B(a)P were 0.06-707.12 ng/g in sediment of rivers and lakes, 7.1-1 492.12 ng/g in surface sediment of seaports, marines, and tidal flats respectively. Conclusion Domestic water environment is generally suffered from B(a)P contamination, but still under the adverse effect level.

Objective To analyse the personality characteristics of medical undergraduate and graduate newcomers. Methods Cattell 16 Personality Factor Questionnaires (16PF) were employed to assess the personality of 675 undergraduate newcomers (306 males and 369 females) and 155 graduate newcomers (76 males and 79 females),and the results were compared with the established findings of the country. Results Compared with male undergraduate newcomers,the scores of rule-consciousness,self-reliance and environmental adaptation of male graduate newcomers were higher,while those of sensitivity,openness to change,tension,cowardice and bravery were lower (P

Objective To investigate the expression of adiponectin in placenta and its correlation with preeclampsia.Methods Placental tissues were collected from normal term pregnancies(normal pregnancy group,n=20),mild preeclampsia(mild preeclampsia group,n=12)and severe preeclampsia (severe preeclampsia group,n=22).The expression of adiponectin protein and the intensity of its mRNA in placenta were detected using immunohistochemistry and RT-PCR,respectively.Integral optical density (IOD)which represents the expression level of adiponectin protein,and the ratio of adiponectin cDNA PCR products to β-actin cDNA PCR products which represents the intensity of transcription of adiponectin mRNA in placenta were analyzed.Results (1)The expression of adiponectin protein was observed in cytoplasm of placental cytotrophoblasts and syncytiotrophoblasts among three groups.There was no significant difference in adiponectin protein expression between maternal side and fetal side of placenta in three groups(all P＞0.05);(2)The expression of adiponectin protein in placenta in severe preeclampsia group(30 984 ±14 604)was significantly lower than that of mild preeclampsia group(58 360±8910,P＜0.01)and of normal pregnancy group(53 246±17 554,P＜0.01).There was also no significant difference in the expression of adiponeclln protein in placenta between term delivery and preterm delivery in severe preeclampsia group(38 890±20 386 vs 29 319±8997,P＞0.05),however,the expression of adiponectin protein in placenta in term delivery of severe preeclampsia group was significantly lower than that ofterm delivery of normlal pregnancy group(38 890±20 386 vs 53 246±17 554,P＜0.05);(3)The expression of adiponectin mRNA was detected in placental tissues among three groups also.The intensity of transcription of adiponectin in placenta in severe preeclampsia group(1.0±0.2)was markedly lower than that of mild preeclampsia group(2.9±0.8,P＜0.05)and normal pregnancy group(3.3±1.1,P=0.000).Conclusion The expression of adiponectin decreases in placenta tissues of severe preeclampsia,indicating that the abnormal expression of adiponectin may be involved in the pathogenesis of preeclampsia.

Objective To explore the bone mineral density (BMD) status and its influencing factors in schizophrenia patients in order to provide basis for risk assessment in psychiatric nursing.Methods A total of 1,139 hospitalized schizophrenia patients were recruited and assigned into the medication group (n=652) and the non-medication group (n=487) according to previous antipsychotic drug history.T-score and Z-score of BMD were determined using Sunlight Omnisense 7000S Bone Densitometry.Blood calcium,blood phosphorus and serum prolactin levels were measured using fasting blood of ulnar vein.Results Differences in age,BMD,milk intake,level of activity,level of smoking,history of fall,history of fracture,serum Ca2+ and PRL were statistically significant between two groups(P＜0.05);there were significant differences in BMD rank distributions among schizophrenia patients with different courses of disease and lengths of taking antipsychotics (P＜0.001);multiple linear regression showed that influencing factors of BMD with statistical significance were courses of disease,lengths of taking antipsychotics,serum Ca2+,serum PRL,milk intake,level of activity,and level of smoking.Conclusion The BMD was lower in the medication group than that in the non-medication group,and the development of osteoporosis was correlated to various factors.Clinical nurses should master high-risk factors thoroughly and adopt intervention measures in a timely manner.

Objective To analyze the latency of posture evoked response of normal lower limb muscle in different stimulations and explore its influencing factors. Methods The normal lower limb was induced to produce postural evoked response by the dynamic posturography through two kinds of perturbations, the supporting surface rotation stimulation (Toes-up and Toes-down) and the horizontal perturbation stimulation (Forward and Backward). The latencies of tibialis anterior muscle and gastrocnemius muscle were recorded by surface electromyography acquisition system. The differences of the left and right limb, gen-der and height on the latency of postural evoked response were analyzed. Results (1) Under the Toes-up and Backward perturbation, the latency of tibialis anterior muscle was longer than gastrocnemius muscle;under the Toes-down and Forward perturbation, the latency of gastrocnemius muscle was longer than tib-ialis anterior muscle. (2) The latencies of left limb and right limb had no significant difference. (3) The la-tency in male was longer than that in female. (4) The latency gradually increased with the increase of height. Conclusion In the postural evoked response, different perturbations, gender and height have sig-nificant impacts on the latency of posture evoked response of lower limb muscle. However, the effect of height and gender should be not considered referring to the same individual.

Objective: To investigate the changes of gallbadder motive function in diabetics. Method: The size of gnllbadder,recovering rate,echo and half-empty time after fat food were compared and statistically analyzed between 22 healthy individuals and 20 diabetics with ultrssonograph. Results:The gallbadder recovering rate was similar between the healthy individuals and diabetics (P>0.05), but the rate of cholecystitis (30%) and choletethiasis (35%) of diabetics were higher than those in healthy individuals, the gallbadder half-empty time after fat food was obviously slower in diabetics (46.1+12.9 min)than those healthy individuals (27+4.4 mmin). Conclusions: The diabetics had obvious gallbadder motive funciion obstruction and higher rates of chronic cholecystitis and choletethiasis with ultrasonograph observations.

OBJECTIVE:To observe therapentic efficacy of bevacizumab combined with irinotecan+leucovorin+fluorouracil (FOLFIRI)plan in the treatment of advanced colon cancer,toxic reaction and patients'survival rate. METHODS:A total of 113 patients with advanced colon cancer admitted to the oncology department in our hospital from Jan. 2010 to Aug. 2014 were random-ized into observation group 1(40 cases),observation group 2(39 cases)and control group(34 cases). Three groups received FOLFIRI;observation group 1 and 2 were additionally given Bevacizumab injection 5 and 7.5 mg/kg 14 d as a treatment course, for 8 cycles. Clinical efficaices as well as the positive rate of VEGF-A,immune indexes(the proportion of CD3+,CD3+CD4+,CD3+CD8+ in T cell subset)before and after treatment,the incidence of toxic reaction,1-year and 2-year survival rates were compared among 3 groups. RESULTS:The total response rate of observation group 1 and 2 were significantly higher than control group,and the positive rate of VEGF-A in observation group 1 and 2 were significantly lower than control group,with statistical significance (P<0.05). The proportion of CD3+,CD3+CD4+ and CD3+CD8+ in 3 groups were significantly lower than before treatment,but ob-servation group 1 and 2 were significantly higher than control group,with statistical significance(P<0.05). The incidence of grade hypertension(grade 3-4)in observation group 1 and control group were lower than observation group 2;the incidence of leucope-nia(grade 3-4)in observation group 1 and 2 were significantly lower than control group,with statistical significance(P<0.05). There was no statistical significance in 1-year survival rate among 3 groups(P>0.05). 2-year survival rate of observation group 1 and 2 were significantly higher than control group,with statistical significance(P<0.05). CONCLUSIONS:For advanced colon cancer,different doses of bevacizumab combined with FOLFIRI have significant synergistic effect,can effectively inhibit VE-FG-A,play a role of immune protection and anti-toxic side effects,and prolong the survival time. The incidence of hypertension in patients treated with low-dose bevacizumab is relatively lower and the safety is better.

Animals ; Disease Models, Animal ; Ischemic Preconditioning ; methods ; Lipid A ; administration & dosage ; analogs & derivatives ; MAP Kinase Signaling System ; Male ; Rats ; Rats, Wistar ; Reperfusion Injury ; metabolism

AIM To study the effect of bioactive compounds from entomogenous fungi (BCEF0083) on sleep-wakefulness cycle and behaviour in chronic unpredictable stress model of depression in rats. METHODS The effect of BCEF0083 on sleep-wakefulness cycle and behaviour was examined in the chronic unpredictable stress model of depression in rats. Stereotaxic and polysomnography were used to record the sleep-wakefulness cycle. The behaviour of rats was tested in the open field. RESULTS BCEF0083 increased ambulation and rearing score of chronic unpredictable stressed rats in the open field. BCEF0083 attenuated REMS percent and latency in chronic stressed rats obviously. CONCLUSION BCEF0083 can ameliate sleep-wakefulness cycle and behaviour in chronic unpredictable stress model of depression in rats.

Objeoctive To compare the effects of etomidate and propofol on cerebral oxygen metabolism in patients undergoing abdominal surgery.Methods Thirty-six ASA Ⅰ or Ⅱ patients aged 30-64 yr weighing 42-73 kg undergoing abdominal surgery under general anesthesia were randomly divided into 2 groups (n=18 each):group E etomidate and group P propofol.Left radial artery was cannulated for continuous direct BP monitoring.A catheter was inserted into right internal jugular vein(LJV) and advanced cephalad until jngatar bulb for blood sampling.Both groups received midazolam 0.08 ms/ks,fentanyl 3μg/kg and vecurunium 0.1 mg/kg and in addition group P received propofol 1.5 mg/ks and group E etomidate 0.3 mg/kg respectively for induction of anesthesia.Anesthesia was maintained with propofol infusion at 4-6 mg·kg-1·h-1 in group P and etomidate infusion at 0.4-0.7 mg·kg-1·h-1 in group E and intermittent iv boluses of fentanyl and vecuronium.ECG,MAP,HR,SpO2 and PET CO2 were continuously monitored.Blood samples were taken from radial artery and IJV for blood gas analysis and lactic acid measurement before induction of anesthesia(T1),immediately after intubation (T2),30 min after skin incision (T3) and at the end of operation(T4).The rate of cerebral O2 extraction (CERO2) was calculated.Results The hemodynamic variables were within the normal range throughout the anesthesia and operation.The oxygen saturation and oxygen partial pressure of both arterial and venous blood(SaO2,SjvO2,PaO2,PjvO2) rose significantly after induction of anesthesia in both groups.There was no significant difference in arterial and venous blood lactic acid level and SaO2,SjvO2,CaO2,CjvO2,Da-jvO2 or CERO2 at all time points between the two groups.Conclusion Both etomidate and propofol combined with midazolam and fentanyl can decrease cerebral O2 metabolic rate and there is no significant difference between the two groups.