Air ; analysis ; Chromatography, High Pressure Liquid ; methods ; Polyamines ; analysis ; Workplace

Angiotensin II ; metabolism ; Cisplatin ; adverse effects ; Humans ; Kidney ; drug effects ; Kidney Diseases ; chemically induced ; metabolism

Air ; analysis ; Air Pollutants, Occupational ; analysis ; Ethane ; analogs & derivatives ; analysis ; Nitroparaffins ; analysis ; Uncertainty ; Workplace

Cyclodextrin(CD) is gradually applied in the nonviral gene vector system,due to its biocompatibility and flexibility of tailing via structural modification,polymerization or supramolecular combination.The ideas and research progress of the CD,its low molecular derivatives,CD polymers and CD supramolecular combination in the field of norviral gene vectros were reviewed,and their "structure-safety-transfection efficiency" relationships were discussed.

Adult ; Bronchoalveolar Lavage ; methods ; Humans ; Male ; Middle Aged ; Pneumoconiosis ; therapy ; Treatment Outcome

Objective To study the chemical constituents from the bark of Juglans mandshurica. Methods The compounds were isolated and purified by column chromatography on silica gel,HPLC,and recrystallization.Their structures were elucidated by the physicochemical and spectroscopic evidences. Results Fifteen compounds were identified as:4,8-dihydroxynaphthalenyl-O-?D-(6′-acetoxyl)gluco- pyranoside(Ⅰ),dihydrokaempferol(Ⅱ),juglone(Ⅲ),daucosterol(Ⅳ),kaempferol(Ⅴ),4,8-dihy- droxynaphthalenyl-1-O-?-D-[6′-O-(3″,5″-dimethoxy-4″-hydroxybenzoyl)] glucopyranoside(Ⅵ), kaempferol-3-O-?-L-rhamnoside(Ⅶ),3,3′-dimethoxylellagic acid(Ⅷ),naringenin(Ⅸ),quercetin (Ⅹ),reginolone(Ⅺ),quercetin-3-O-?-L-rhamnoside(Ⅻ),naringenin-7-O-?-D-glucoside(ⅩⅢ),4,8- dihydroxynaphthalenyl-1-O-?-glucoside(ⅩⅣ),4,5,8-trihydroxy-?-tetralone-5-O-?-D-[6′-O-(4″-hy- droxy-3″,5″-dimethoxy-benzoyl)] glucoside(ⅩⅤ).Conclusion CompoundⅠ(juglamanol)is a new compound.CompoundsⅡ,Ⅶ—Ⅸ,Ⅻ,andⅩⅢare isolated from plants of Carya Nutt.for the first time.

OBJECTIVETo establish a ion chromatography method for determination of phosphorus oxychloride in the air of workplace.

METHODThe phosphorus oxychloride in the air of workplace was collected by absorb liquid and turned into hydrochloric acid, then separated in column and detected with conductivity detector, qualified by elution time and quantified by peak height or peak area.

RESULTSThe linear range of phosphorus oxychloride in air of workplace was 0.72 ∼ 5.76 µg/ml with its correlation coefficient 0.9999. The detecting limit of the method was 0.12 µg/ml. The smallest detecting concentration of the method was 0.08 mg/m(3) for 15 L sampling air. Relative standard deviation was 3.3% ∼ 6.2% and the recovery was 97.8% ∼ 103.8%. The sample could be resaved at room temperature at least for seven days.

CONCLUSIONThe indicators of the method correspond GBZ/T 210.4-2008«Guide for establishing occupational health standards-Part 4: Determination methods of air chemicals in workplace». It is a good method to determine phosphorus oxychloride in the air of workplace.

OBJECTIVETo evaluate the uncertainty of measurement result of urinary fluoride and to provide quality assurance for determinations.

METHODThe investigation was conducted, according with principles and methods for uncertainty evaluation.

RESULTSThe uncertainty of the combined standard of present method was 2.86 %. For the sample containing 4.47 mg/L urinary fluoride, the expanded uncertainty was 0.26 mg/L.

CONCLUSIONThe uncertainty of the present method was mainly from the sample repeatability, the preparation of standard solution, the linearity of the calibration curve and instruments and so on.