Objective To investigate the contamination and dietary intake of the aluminium in commercial foods in Shaanxi Province,and evaluate its potential health risks in Shaanxi population.Methods Six hundred and sixty-six samples from 8 kinds of foods in Shaanxi Province were collected from 2013 to 2015.The aluminium contents were detected according to National Food Contamination and Harmful Factors in Risk Monitoring Manual,and dietary intake of aluminium in Shaanxi population was evaluated by point assessment model with of nutritional survey date.Results The average dietary intake of aluminium was 0.154 9 mg/kg BW per day,and the dietary intake of woman aged 18 to 59 years old was the highest,with an average of 0.178 5 mg/kg BW per day.When aluminum intake of the 97.5 percentile,the dietary intake of aluminium in children aged 2 to 7 years old was the highest.The margins of safety (MOS) of all age groups were smaller than 1,while the MOS of high exposure (P97.5) group was above 1.Fried and baked food were the main sources of aluminium exposure in two age groups (2-7 years and 8-12 years old group),while fried food,cold noodle and starch products were the main sources of aluminium exposure for others.Conclusion Dietary intake (tP97.5) of aluminium exceeded the provisional tolerable weekly intake (PTWI).The dietary intake of aluminium in women and children was high.Fried food was the main sources of aluminium exposure in all age groups.

OBJECTIVEIn order to accurately reconstruct the acoustic source image, the application of transducer's receiving characteristics in magneto-acoustic tomography with magnetic induction (MAT-MI) is studied.

METHODSThe conductivity phantom model is built, and the magnetic acoustic signals are simulated and the acoustic sources are reconstructed according to the transducer's receiving characteristics.

RESULTSThe reconstructed image of acoustic source is consistent with the topographic shape and size of the phantom model.

CONCLUSIONMAT-MI based on the transducer's characteristics lays the foundation for further study.

Acoustics ; Magnetic Phenomena ; Magnetics ; Tomography ; Transducers

This article was aimed to study An-shen drug substances of semen ziziphi spinosae and the relationship between index component distribution in vivo and meridian tropism. Intragastric administration of thyroid tablet suspension at the dose of 160 mg·kg-1 was given for 13 days for the establishment of yin deficiency rat model. Elevated plus maze test (EPM) was combined with light/dark box test to evaluate the effect of semen ziziphi spinosae on anxiety behavior among yin deficiency rats. The yin deficiency anxiety model rats' eyeballs were picked for blood at 10, 20, 30, 40, 60, 90, 120, 240 min after intragastric administration of semen ziziphi spinosae decoction. The rats were sacrificed for the collecting of heart, liver, spleen, lungs, kidneys, stomach, brain, large intestine and small intestine and other tissues. HPLC-PDA-ELSD was combined to detect concentrations of spinosin, jujuboside A and jujuboside B in different tissues of rats. Related pharmacokinetic parameters were achieved after processing detected data with DAS 2.0 software. The results showed that compared with the yin deficiency group, semen ziziphi spinosae significantly reduced the rats' abnormal increased food-intake (P < 0.01) and water intake (P < 0.01) within 24 hours; significantly increased the body weight difference before and after treatment (P < 0.01); significantly reduced the kidney coefficient (P < 0.01) and adrenal gland coefficient (P < 0.01); significantly reduced the value of T3 (P < 0.01) and T4 (P < 0.05); significantly increased the value of TSH (P < 0.01). It showed that semen ziziphi spinosae can obviously improve yin deficiency symptoms. It significantly increased the number of open arms entering percentage (P < 0.01), the open arms holding percentage (P < 0.01), and the box through times in light/dark box test (P < 0.01). It showed obvious anti-anxiety effects. The index component distribution in vivo results showed that spinosin and jujuboside A were widely distributed in the heart, liver, spleen, lungs, kidneys, stomach, brain, large intestine, small intestine and other tissues through blood circulation. Jujuboside B was distributed in the blood, stomach, large intestine and small intestine through blood circulation. The order of average concentration of spinosin among tissues was small intestine > stomach > liver > brain > large intestine > spleen > lungs > heart > kidneys. The order of AUC0-t in tissues was small intestine > stomach > liver > large intestine > spleen > brain > heart > kidneys > lungs. The order of average concentration of jujuboside A among tissues was lungs > large intestine > heart > spleen > liver > kidneys > small intestine > stomach > brain. The order of AUC0-t in tissues was lungs > spleen > liver > heart > large intestine > brain > stomach > kidneys > small intestine. The order of average concentration of jujuboside B among tissues was large intestine > small intestine > stomach. The order of AUC0-t in tissues was large intestine > small intestine > stomach. It was concluded that semen ziziphi spinosae can obviously improve yin deficiency symptoms with good anti-anxiety effects. Spinosin and jujuboside A in semen ziziphi spinosae were the drug substances of An-shen effect. They were also the material basis of sweet and sour taste. The spinosin and jujuboside A distribution in vivo of yin deficiency anxiety model rats were close to the meridian tropism of semen ziziphi spinosae.