Objective To explore the determination of dioxin in wastewater samples pretreated by solid phase microextraction(SPME). Methods The wasterwater samples were purified and enriched by SPME, then were determined with HRGC-HRMS for the concentration of dioxin in wastewater samples. Results The most suitable conditions of the pretreatment were 30 min microextraction at 45 ℃. The detection limit was 0.05 pg/?l. RSD was lower than 10%. The recovery rates were 99%-102%. The concentration of total dioxins in wastewater sample was 0.78 pg/?l. Conclusion The method of the determination of dioxins in wastewater by SPME was simple and quick, and presented a broad prospects for application.

Since 1970's , lots of studies on biodegradation of chloroanilines (CAS) have been done, especially, in these aspects: spieces and capability of the microbes; metabolic pathway; gene cloning, expression of degradation plas-mid and pivotal metabolic emzymes. It is necessary for us to review the study on biodegradation of chloroanilines in order to summarize some useful results and the problems in this study.

To determining the postmortem interval (PMI) through quantitative analysis of the DNA degradation of cell nucleus in human brain and spleen by using image analysis technique (IAT). The brain and spleen tissues from 32 cadavers with known PMI were collected, subjected to cell smear every 1 h within the first 5-36 h after death, stained by Feulgen-Van's staining, Three indices reflecting DNA in brain cells (astrocytes) and splenic lymphocytes, including integral optical density (IOD), average optical density (AOD), average gray (AG) were measured by employing the mage analysis instrument. The results showed that IOD and AOD declined and AG increased with the prolongation of dead time within 5-36 h. A correlation between the PMI and gray parameters (IOD, AOD and AG) was identified and the corresponding regression equation was obtained. The parameters (IOD, AOD and AG) were proved to be effective quantitative indicators for accurate estimation of PMI within 5-36 h after death.
Cell Nucleus/*pathology ; DNA Degradation, Necrotic ; Forensic Pathology ; Liver/*pathology ; Postmortem Changes ; Spleen/*pathology ; Time Factors

OBJECTIVETo compare the clinical curative effects between 89Sr and its combination with the Guliu recipe (GLR, a Chinese herbal medicine) in treating multiple bone metastatic tumor of mammary cancer (MBM-MC).

METHODSBy adopting the random sampling and grouping method, 89Sr alone (Sr) and 89Sr combined with CHM (Sr-GLR) were used in treating 86 and 40 patients with MBM-MC respectively. The efficacy of therapy were appraised according to the degree of ostalgia relieving and quality of life (QOF) in patients, and the effect of treatment on focal bone metabolism and bone marrow hematopoietic function were compared.

RESULTSThe effective rate of Sr and Sr-GLR in relieving ostalgia was 83.72% and 95.00%, respectively (P > 0.05), the QOF improving and stabilizing rate of them 80.23% and 95.00% (P < 0.05), the effective rate on focal bone metabolism 59.30% and 52.50% (P > 0.05) and their hemo-toxicity 28.00% and 30.00% (P > 0.05).

CONCLUSIONSr-GLR is a combination therapy in treating MBM-MC with good effect, it could raise the patient's QOF, enhance the ostalgia relieving effect without increasing the hemo-toxicity of treatment.

Adult ; Aged ; Bone Neoplasms ; drug therapy ; radiotherapy ; secondary ; Breast Neoplasms ; drug therapy ; pathology ; radiotherapy ; Carcinoma, Ductal, Breast ; drug therapy ; radiotherapy ; secondary ; Combined Modality Therapy ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Humans ; Middle Aged ; Phytotherapy ; Quality of Life ; Strontium Radioisotopes ; therapeutic use

To optimize the immunization strategy against HIV-1, a DNA vaccine was combined with a recombinant vaccinia virus (rTV) vaccine and a protein vaccine. Immune responses against HIV-1 were detected in 30 female guinea pigs divided into six groups. Three groups of guinea pigs were primed with HIV-1 DNA vaccine three times, boosted with rTV at week 14, and then boosted with gp140 protein at intervals of 4, 8 or 12 weeks. Simultaneously, the other three groups of animals were primed with rTV vaccine once, and then boosted with gp140 after 4, 8 or 12 weeks. The HIV-1 specific binding antibody and neutralizing antibody, in addition to the relative affinity of these antibodies, were detected at different time points after the final administration of vaccine in each group. The DNA-rTV-gp140 immune regimen induced higher titers and affinity levels of HIV-1 gp120/gp140 antibodies and stronger V1V2-gp70 antibodies than the rTV-gp140 regimen. In the guinea pigs that underwent the DNA-rTV-gp140 regimen, the highest V1V2-gp70 antibody was induced in the 12-week-interval group. However, the avidity of antibodies was improved in the 4-week-interval group. Using the rTV-gp140 immunization strategy, guinea pigs boosted at 8 or 12 weeks after rTV priming elicited stronger humoral responses than those boosted at 4 weeks after priming. In conclusion, this study shows that the immunization strategy of HIV-1 DNA vaccine priming, followed by rTV and protein vaccine boosting, could strengthen the humoral response against HIV-1. Longer intervals were better to induce V1V2-gp70-specific antibodies, while shorter intervals were more beneficial to enhance the avidity of antibodies.
AIDS Vaccines ; administration & dosage ; genetics ; immunology ; Animals ; DNA, Viral ; administration & dosage ; genetics ; immunology ; Female ; Guinea Pigs ; HIV Infections ; immunology ; prevention & control ; virology ; HIV-1 ; genetics ; immunology ; Humans ; Immunization ; methods ; Vaccines, DNA ; administration & dosage ; genetics ; immunology ; Vaccinia virus ; genetics ; immunology ; env Gene Products, Human Immunodeficiency Virus ; administration & dosage ; genetics ; immunology

OBJECTIVETo observe the effect of Baichanting Compound (BC) on dopamine (DA) in striatum of Parkinson's disease (PD) mice, and to screen the optimal component proportion.

METHODSThe PD model was established in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) induced C57BL/6 mice. By using uniform design, they were intervened by three extracts of BC in different proportions [Acanthopanax senticosus extract (X1): white peony root extract (X2): Uncaria rhynchophylla extract (X3) = 30.00: 34.92: 82.50, 48.00: 19.98: 72.19, 18.00: 44.88: 61.88, 36.00: 29.94: 51.56, 54.00: 15.00: 41.25, 24.00: 39.90: 30.94, 42.00: 24.96: 20.63). Equal volume of 5% carboxymethylcellulose sodium was administered to mice in the model group and the normal group by gastrogavage. All medication was lasted for 20 successive days. The dopamine (DA) content was determined by ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS). Except 10 in the normal group, 20 PD model mice were screened and divided into the model group and the BC group (with the optimal proportion) according to random digit table. BC extract in optimal proportion was administered to mice in the BC group by gastrogavage, while equal volume of 5% carboxymethylcellulose sodium was administered to mice in the model group and the normal group by gastrogavage. All medication was lasted for 20 successive days. Praxiology was observed in each group. DA content in striatum was also detected. Results Compared with the normal group, the DA content in striatum decreased significantly in the model group (P < 0.01), suggesting a successful PD modeling. Compared with the model group, the DA content in striatum increased significantly in 1 and 2 groups (P<0.05). According to results of quadratic polynomial stepwise regression statistics, the regression equation obtained was: Y = 0.265 + 0.026 X 2 - 0.056 X 3 + 0.334 x 10(-3) x X1 x X3 + 0.691 x 10(-3) X X3(2). X3 extract was the main factor influencing the effectiveness (P < 0.01). The optimal proportion of BC was predicted by the regression equation: X1 = 54.00 mg/(kg x d), X2 = 44.88 mg/(kg x d), the X3 = 82.50 mg/(kg x d). The pole climbing time was shortened, times of autonomic activities increased, DA content was elevated, all with statistical difference in BC groups (P < 0.01, P < 0.05).

CONCLUSIONBC could increase DA content in PD model mice with the optimal proportion as 54.00: 44.88: 82.50.

1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine ; Animals ; Disease Models, Animal ; Dopamine ; metabolism ; Drugs, Chinese Herbal ; pharmacology ; therapeutic use ; Mass Spectrometry ; Mice ; Mice, Inbred C57BL ; Motor Activity ; Parkinson Disease ; drug therapy ; metabolism

An untargeted urinary metabonomics method based on ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry ( UPLC-Q-TOF-MS ) has been established to investigate the mechanism of Schisandra chinensis in treating diabetes and its complications. The urinary biomarkers related to the therapeutic effects of Schisandra chinensis on the diabetes rats were analyzed. In urine, 28 kinds of endogenous metabolites were identified as potential biomarkers, including 13 endogenous metabolites in positive ion mode, 15 endogenous metabolites in negative ion mode, and hippuric acid detected both in positive and negative ion modes. The results revealed that Schisandra chinensis mainly affected the pathways of pentose and glucuronate interconversions, riboflavin metabolism, pantothenate and CoA biosynthesis, arginine and proline metabolism, intestinal bacteria metabolism, ascorbate and aldarate metabolism and tryptophan metabolism in diabetic rats. Combined with biological analysis of these pathways, the therapeutic mechanism of Schisandra chinensis on diabetes and its complications was verified. Based on the biological function of each pathway, the effect of Schisandra chinensis on diabetic nephropathy is stronger. Moreover, it also has the effects of protecting liver, decreasing fat and antioxidant activity.

Objective To retrospectively analyze the efficacy of radiotherapy on nasal NK/T-cell lymphoma, and to explore the prognostic factors. Methods Between January 2000 and December 2008, 62 patients with nasal NK/T-cell lymphoma were treated with radiotherapy in our hospital. Their clinic data and efficiency were reviewed retrospectively. Kaplan-Meier methods were applied in unifactorial analysis and the COX regression model was applied in multivariate analysis. Results The median overall survival time was 69.7 months (95 % CI, 63.0-78.0 months), and 3, 5-year survival rate was 66.1% and 46.8 %. Metastasis was 61.8 % for the first reason which resulted in failure. The median survival time was 72.6 months in the increased group of numbers of T lymphocyte CD3 and 39.6 months in the decreased group, the difference was significant(x2 =4.9309, P =0.0264). Multivariate analysis confirmed that modified IPI 0-1 (x2 = 7.5266, P =0.0061), the numbers increased for CD3 (x2 =9.0912, P =0.0266), and complete remission(x2 = 9.0912, P =0.0106) were significant favorable prognostic factors for survival. Conclusion The radiotherapy was effective for patients with nasal NK/T-cell lymphoma, but was failure on account of distant metastasis, so systematic therapy still has an important role. modified IP1 0-1, the number increased for CD3 and complete remission were significant favorable prognostic factors for survival.

Objective To study the biological activities of Synechococcus sp.PCC7942 with trans-mutated hCu,Zn-SOD-gene.Methods Synechococcus sp.PCC7942 with trans-mutated hCu,Zn-SOD were administered orally for 20d to mice,then the activities of glutathione peroxidase(GSH-Px),catalase(CAT),superoxide dismutase(SOD) and the content of malondialdehyde(MDA) were determined.Results The activities of GSHPx in serum and the activities of CAT in blood increased obviously;the activity of SOD in serum and liver increased markedly;the content of MDA in serum and liver decreased obviously.Conclusion Synechococcus sp.PCC7942 with trans-mutated hCu,Zn-SOD-gene had obvious antioxidant effect in vivo.

To select the most effective parameters of electroacupuncture (EA) at Hegu (LI4) and Sanyinjiao (SP6), a traditional acupuncture formula that induces labor, by comparing its effects on uterine contraction in late-stage pregnant rats, so as to improve the effects of acupuncture on induction of labor and its clinical maneuverability and provide the basis for further mechanism research.