2.Determination of Phthalates in Water by Solid Phase Extraction-Gas Chromatography-Mass Spectrometry
Journal of Environment and Health 2007;0(11):-
Objective To establish a method for the determination of phthalates in water by solid phase extraction-gas chromatography-mass spectrometry(SPE-GC-MS).Methods The water samples were extracted and enriched by solid phasse extraction,using 10%methanol-methyl tert-butyl ether as eluant,dimethylphthalate(DMP),diethylphthalate(DEP),dibutylphthalate (DBP)and diethylhexylphthalate(DEHP)were determined by gas chromatography-mass spectrometry with selected ion monitoring mode(SIM).Results The concentration had a good linear range in the range of 0.00~10.00?g/ml,the correlation coefficient was above 0.998.The detection limit of DMP,DEP,DBP and DEHP were 2.7,2.1,1.6 and 2.5 ng/L respectively,the average recovery rate and the RSD of the method were 78.0%~102.5%and 3.3%~7.8%respectively.Conclusion This method,with small amount of solvent,is simple,fast,accurate and is applicable to the determination of phthalates in water.
3.The Study of 12-alkylated Chitosans/Plasmid-encoding Antisense ECE Complex Nanoparticles in Asthma
Yu-Tian ZHOU ; Jun XU ;
China Biotechnology 2006;0(11):-
Aim: To prepare chitosan nanoparticlescarrying gene and study its characteristics in vitro and in vivo.Methods:12-ACSs was dissolved in 0.05mol/L sodium acetate buffer to form a solution of 1mg/ml and a DNA(plasmid-encoding antisense ECE ) solution of 0.1mg/ml was dissolved in 25mmol/L Na2SO4.The charge ratio of components is selected as 2/1 for 12-ACSs /DNA complex.The complex was prepared by mixing 12-ACSs solution with DNA solution prior to observation by using transmission electron microscopy.Using Electrophoretic Retardation of DNA Migration detection,DNA precipitation,Binding Equilibration and DNase Resistivity Assay,the formation of 12-ACSs /DNA complex was determined and its stability was simultaneously evaluated.MTT Cell Proliferation Assays was performed on investigation of the cytotoxicity of 12-ACSs /DNA nanoparticles in bronchial epithelial cells (16HBE).The transfection efficiency of 12-ACSs /DNA nanoparticles in vitro and in vivo was investigated in 16HBE cells and Balb/c mice.Results: 12-ACSs /DNA nanoparticles (100~150nm) were observed by transmission electron microscopy.12-ACSs can protect the plasmid encoding antisence-ECE from degradation by DNase I.12-ACSs can transfer plasmid-encoding antisense ECE into 16HBE cells and into the airway epithelium in mice.As shown by fluorescent microscopy,green fluorescent protein reporter can be observed in the transfected cells as well as in the airway epithelium of the treated mice.And it showed a lower cell cytotocixity in cultured 16HBE cells and in mice treated with12-ACSs /DNA nanoparticles.Conclusion: In summery,the chitosan can be used as an effective protectant for DNA as well as an enhancer for in vitro gene transfection.
4.Effects of lactic acid bacteria on P38 signaling in immune response to dust mite in mite-sensitized mice
Chinese Journal of Immunology 2000;0(09):-
Objective:To investigate the effect of lactic acid bacteria on P38 signaling in immune response to dust time in mite-sensitized mice.Methods:40 C57BL/6 mice in Group M,P and C,except for N(saline control),were sensitized and challenged with mite extract.Mice in C and P were simultaneously fed to Lactococcus lactis and Lactobacillus respectively.Total cell count and classification in BALF were done and IL-4 level detected by ELISA.Western blot were performed for detection of P38 signaling from mice's spleen cells stimulated with mite extract.Results:IL-4 level,total cell count and the percentage of eosinophils in BALF were significantly lower in Group C(P
5.The Lazarus Syndrome
Yangyang FU ; Jun XU ; Xuezhong YU
Chinese Journal of Emergency Medicine 2016;25(2):241-245
The Lazarus phenomenon is defined as delayed ROSC,or ROSC after failure of CPR and cessation of all the emergency medical care,including the cessation of chest compression,mechanical ventilation,and venous fluid resuscitation.It was first reported in 1982 and 53 cases of Lazarus phenomenon have been reported in the medical literature so far.Even though Lazarus phenomenon is rare and the pathophysiological mechanisms are poorly understood,several possible mechanisms are still proposed,which could be rational to explain this phenomenon,such as auto-PEEP,hyperkalemia,alkalosis,delayed action of drugs,etc.In most cases,it was reported that ROSC occurred within 10 minutes after cessation of medical effort.Therefore,before the announcement of death of patient,it is mandatory to monitor those patients for at least 10 minutes after the cessation of CPR.However,more explicit studies seem to be necessary to gain a better understanding of this phenomenon.
6.Advances in differential roles of HIF-1αand HIF-2αin the pathogenesis of hypoxic pulmonary hypertension
Jun DENG ; Xu ZHANG ; Shanshan YU
Chinese Pharmacological Bulletin 2017;33(1):10-13
Hypoxia-induced factors(HIFs)are the main regula-tors for the response of hypoxic environment.They are involved in hypoxia-related lung tissue cell damage and abnormal cell pro-liferation,among which,HIF-1αand HIF-2αplay the most im-prominant roles.This paper reviews the current researches of HIF-1αand HIF-2α,focusing on their structural and functional similarities and diversities,as well as their roles in the patho-genesis of hypoxic pulmonary hypertension.
7.Immunomodulatory effects of lactobacillus on dust mite sensitized murine model
Journal of Medical Postgraduates 2003;0(06):-
Objective: To compare the immunomodulatory capability to allergic asthma between orally taken Lactococcus lactis and Lactobacillus Lactobacillus plantarum in dust mite-sensitized mice. Methods: C57BL/6 mice were divided into four groups;Group N,M,L and P.Mice in M,Land P groups were sensitized with 2 % mite extract on day 0,7and 14 and challenged with 4% mite extract on day 21,22,23 and 24.Meanwhile we fed Lactococcus lactis and Lactobacillus plantarum to mice in L and P group respectively from each day of sensitization on as well as from the first day of challenge on,continuing for five days.Mice in N and M group were treated with saline as control.Histopathologic examination in the lung tissues of the mice was performed at day 3 after the last challenge.Cell count and classification,and Th1/Th2 cytokine levels in BALF were measured simultaneously.Isolated splenocytes from the mice were subjected to the detection of cell proliferation by BrdU incorporation in response to the mite extract.Using ELISA,the levels of Th1/Th2 cytokines in the supernatant of mite-stimulated splenocytes were measured. Results: Pulmonary allergic inflammation with eosinophilic infiltration as well as increased levels of IL-4 and IL-5 in BALF were observed in mice sensitized/challenged with mite extract(Group M).Pulmonary inflammation was decreased significantly in group L concomitant with down regulated levels of IL-4 and IL-5,total cell count and the percentage of eosinophils in BALF(P
8.Experience on Launching Pharmaceutical Care in Hospital Preparation Room
Jun WU ; Yongzhou YU ; Jianghong XU
China Pharmacy 1991;0(02):-
OBJECTIVE:To discuss the approach to launch pharmaceutical care in hospital preparation room.METHODS:The contents of launching pharmaceutical care in the preparation room of our hospital were analyzed and summarized retrospectively.RESULTS & CONCLUSION:A shifting toward technical service is on the way by launching pharmaceutical care in hospital preparation room.
9.Influence of atmospheric rainfall to γ radiation Kerma rate in surface air
Zhe XU ; Jun WAN ; Rongsheng YU
Chinese Journal of Radiological Medicine and Protection 2009;29(2):224-228
Objective To investigate the influence rule of the atmospheric Rainfall to the γ radiation Kerma rate in surface air in order to revise the resuh of its measurement during rainfall.Methods The influence factors of rainfall to the measurement of the γ radiation Kerma rate in air were analyzed and then the differential equation of the correlation factors was established theoretically,and by resolving the equation,the mathematical model Was obtained.The model was discussed through several practical examples.Results The mathematical model was coincided with the tendency of curve about the measured data on the influence rule of rainfall to the γ radiation Kerma rate in surface air.Conclusion By using the theoretical formula in this article which is established to explain the relationship between the rainfall and the γ radiation Kerma rate in surface air,the influence of rainfall to the γ radiation Kerma rate in surface air could be correctly revised.
10.Nursing care of 4 children with organic acidemia
Hongzhen XU ; Jun YU ; Meili MA
Chinese Journal of Nursing 2010;45(5):434-435
Nursing experiences on 4 children with organic acidemia were summarized. The nursing care focused on correct collection of samples for early diagnosis,prompt opening of an effective intravenous route to manage water,electrolyte,acid-base and metabolic imbalances,special medication nursing,strict diet control to prevent relapse,health education to keep normal growth and development. Three children were followed up for 1 month,7 months and 1 year respectively with disease controlled and a child was withdrawn treatment from.