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Based on soil radon gas survey in Quanzhou City and Jinjiang City, the authors conducted an investigation of the soil radon gas environment in an area of some 465 km2. The results indicate that radon gas concentrations in soils of Quanzhou and Jinjiang urban areas are at a lower level, whereas those in soils of Quanzhou and Jinjiang suburbs are at a fairly high level. It seems that the radon gas concentration is mainly related to geological background: radon gas concentrations in soils derived from weathering of adamellite, moyite, and biotite schist are higher than those in soils derived from weathering of other rock types.

通过泉州市、晋江市土壤中氡气测量，取得约465 km2土壤氡气环境调查成果，从结果来看，泉州市区和晋江市区土壤中氡气浓度普遍较低；市郊主要为山地，土壤中氡气浓度普遍较高；从土壤中氡气浓度水平的分布来看，土壤中氡气浓度水平主要与地质背景有关，二长花岗岩、钾长花岗岩、钾长浅粒岩及黑云片岩风化土壤中氡气浓度明显高于其他地质背景来源土壤。

While two herbicides had no significant effects on the growth of three cyanobacteria at low concentrations (0.01~0.001mg/L), they made damage to cells and affect cyanobacteria's growth at high concentrations (10~100mg/L). EC_(50) values of three cyanobacteria were showed below: Anabaena azollae, 3.172 mg/L; Anabaena azotic, 3.654 mg/L and Anabaena flos-aquae, 3.377mg/L Nitrogenase activities of three species also showed different tolerant capabilities to the two herbicides under 10% vol.

在低浓度(0.01~0.001mg/L)的2种除草剂的作用下，3种固氮蓝藻的生长没有受到明显的影响，而在高浓度下(10~100mg/L)，固氮蓝藻藻细胞在形态上出现受损症状，同时生长速率也受到明显的抑制。120h时，满江红鱼腥藻，水华鱼腥藻及固氮鱼腥藻的EC_(50)值分别为3.172， 3.654及3.377mg/L。

Effects of different reagents, dosages, concentrations, and reduction reagent concentrations on kafirin extraction from Sorghum bicolor were investigated.

以高粱种子为材料，研究了不同提取剂、提取剂用量、浓度和还原剂浓度对高粱种子醇溶蛋白提取的影响。

Priority PAHs recommended by USEPA were all detected, and the mass concentrations of individual PAHs was between 1.49 and 87.43ngg^(-1), The PAHs with low molecular weight, such as Nap, Flu, Ace were observed in relatively low mass concentrations. The PAHs with high molecular weight, such as Chrysene, Indeno [1, 2, 3-cd] pyrene, Benzo perylene were relatively abundant and the mass congcentration of BghiP was the highest. The total mass congcentration of 16 PAHs exceeded standard of Holand from 10 to 40 times, and in middle pollution level comparatively with other districts.

美国环保总署推荐优先控制的16种多环芳烃均被检出，多环芳烃单体的质量浓度在1.49~87.43ngg^(-1)扩之间；其中萘、药、苊等低分子量芳烃的质量浓度相对较低；窟、茚并[1， 2， 3-cd]苝、苯并苝等高分子量芳烃的质量浓度相对较高，苯并苝的质量浓度最高。16种多环芳烃的质量总浓度超过荷兰政府规定无污染土壤PAHs值的10~40倍；与国内外其他地区相比较，多环芳烃污染处于中等水平。

Methods: The cells were treated with the different concentrations of Cobaltous chloride. The lactic acid dehydrogenase from the supernatant of the cells was detected by a biochemical analysis. The cells were co-transfected with a pGL2-eNOS-p vector while stimulated with Cobaltous chloride at the different concentrations and disposing time, and the transcription activity of human eNOS promoter was determined through using a double luciferase reporter gene system.

用含不同浓度氯化钴的培养基培养细胞，检测细胞培养上清中的乳酸脱氢酶含量；将已构建的pGL2-eNOS-p质粒转染HUVEC-12细胞，利用双荧光素酶报告基因技术检测在不同浓度氯化钴和不同作用时间下的eNOS启动子转录活性。

To study the effect of avilamycin and narasin on the intestinal microflora of Cyprinus carpio, the concentrations of avilamycin of both groups were 4mg/kg and 8mg/kg feed respectively, and the concentrations of narasin of both groups were 20mg/kg and 40mg/kg feed respectively.

在研究阿维拉霉素和甲基盐霉素对鲤肠道菌群影响的试验中，各组饲料中添加阿维拉霉素的浓度分别为4mg／kg、8mg／kg基础饲料；添加甲基盐霉素的浓度分别为20mg／kg、40mg／kg基础饲料。

The results from flow cytometry assay showed that the low concentrations of LIF had the ability to shift cytotrophoblast differentiation towards a syncytial pathway, while the high concentrations of LIF towards a invasive pathway.

细胞流式仪结果表明低浓度的LIF可促进绒毛合胞体滋养层的分化，高浓度的LIF可促进绒毛外侵入性滋养层细胞的分化。

In the batch incubation with addition of Asadsorbing ferrihydrite, the presence of arsenicresistant denitrificator caused an increase in concentrations of Fe and Mn, a decrease in concentrations of NO-3 and As, and a high ratio of As to the total As.

在吸附有砷的水铁矿体系中，反硝化菌所产生的反硝化作用可导致溶液中NO-3含量的降低、Fe含量的升高、As含量降低，且As所占比例增加。

Objective To explore the change of serum estradiol (E2) and testosterone concentrations throughout the puberty of girls and estimate the effects of genetic and environmental factors on serum E2 and T concentrations.Methods study population consisted of 180 pairs of twin girls aged 6 to 18 of whom.132 pairs monozygotic twins and 48 pairs dizygotic twins,who were all from Qingdao city of Shandong province.

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During the whole course of the dynamitic development and evolvement of redox zones, concentrations of TOC, sulfide, NH+4-N, HCO-3, CO2 and Fe2+ increased with time and decreased with distance; concentrations of NO-3 and DO decreased with time and increased with distance; SO2-4 concentration decreased first and then increased over time; but decreased with distance.

在氧化还原带的整个演化过程中，各带中TOC、硫化物、NH+4-N、HCO-3、CO2和Fe2+等物质的浓度随时间的推移而升高，随离污染源距离的增加而降低；NO-3和DO等物质的浓度随时间的推移而减小，随离污染源距离的增加而升高；SO2-4的浓度则随时间的推移先减小而后增加，随离污染源距离的增加而降低。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。