[In vitro evaluation of cutaneous allergic reaction induced by chemicals using dendritic cells].

Objective: To investigate the use of dendritic cells derived from mice bone marrow to evaluate the cutaneous allergic reaction induced by chemical sensitizers.

Methods: Dendritic cells derived from mice bone marrow were cultured and administrated with 2, 4-dinitrochlorobenzene (DNCB), nickel sulfate (NiSO4), sodium dodecyl sulfate (SDS) and hexyl cinnamic aldehyde (HCA), respectively. Cell membrane molecule CD86 and extracellular IL-1 beta, IL-6 and IL-12 were detected after 0, 1, 6, 12, 24, 36, 48 hour's administration, respectively.

[Low back pain prevalence of female workers in flat-grained veneer wood industry].

Objective: To study the low back pain(LBP) and its cause on female workers in flat-grained veneer wood industry.

Methods: Bending posture was analyzed by observation and the prevalence of low back pain was investigated by physical examination and questionnaire among 299 female workers.

Results: The prevalence of fatigue compliant in selecting, remending and sticking workers was 68.

[Intervention of nicotinamide on skin melanin genesis after UVA exposed].

Objective: To investigate the interference effect of nicotinamide on UVA-induced melanin genesis and melanin transport in human skin melanocyte.

Methods: The optimum UVA dose expected to cause cell proliferation: 0.2 J/cm(2), nicotinamide was added immediately after the 0.

[Effects of occupational lead exposure on bone mineral density and bone metabolism in workers].

Objective: To investigate the effects of occupational lead exposure on the bone mineral density and the bone metabolism in exposed workers.

Methods: Two hundred and ninety-eight lead-exposed workers in a storage battery plant in Shanghai were selected as the exposed subjects while eighty-one healthy officers in the plant who were not occupationally exposed to lead were treated as the control. The blood lead (BPb) and the urinary lead (UPb) were used as the exposure biomarkers while the Z score, the urinary hydroxyproline (HYP) the serum alkaline phosphatase (ALP) the serum alkaline phosphatase bone isoenzyme BALP and the serum osteocalcin BGP were used as the effect biomarkers for the bone effect caused by the lead.

[The intervention of nicotinamide on skin melanocyte's cell proliferation after UVA (365 nm) exposed.].

Objective: To investigate the interference effect of nicotinamide on UVA-induced cell proliferation in human skin melanocyte.

Methods: To apply the optimum UVA dose expected to cause cell proliferation: 0.2 cm2, nicotinamide was added after the 0.

[Assessment of exposure to extremely low frequency magnetic field emitted from monitors].

Objectives: To investigate intensity of extremely low frequency magnetic field (ELFMF) emitted from cathode-ray tubes (CRT) of monitors in various directions and to find ways to avoid its influence.

Methods: Two hundred CRT monitors and 10 monitors with liquid-crystal display (LCD) were selected. Their ELFMF was detected for three times in front of the monitor at an interval of every 5 cm from 0 cm to 50 cm, as well as at various directions from the monitor.