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Copyright of Journal of Dalian University of Technology / Dalian Ligong Daxue Xuebao is the property of Journal of Dalian University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Field experiments were conducted to study the residue and degradation dynamics of atrazine in typical yellow soil tobacco fields in Guizhou Province,the occurrence of tobacco pesticide damage and the threshold and safety interval of tobacco damage was elucidated. The effects of soil environmental factors on the half-life of atrazine was analyzed. The results showed that atrazine inhibited the growth of tobacco significantly, which showed that the leaves were small, serious deformity, the old leaf tip vein began to yellow. The inhibition rates of plant height and leaf area were significantly positively correlated with atrazine dosage. The inhibition rates of plant height and leaf area increased with the increase of atrazine dosage. The degradation half-life of atrazine in typical yellow soil was 8. 45-11. 95 d, and the safe isolation period in the field should be longer than 48. 6 d. The degradation half-life of atrazine was significantly positively correlated with the content of soil organic matter, there was significant negative correlation with pH and available potassium, but no significant correlation with available phosphorus and available nitrogen. The results had great significance to the scientific application of herbicides and tobacco safety in the sorghum/ maizetobacco rotation area of yellow soil. [ABSTRACT FROM AUTHOR]

The bimetal oxide (CoFe2O4 )/MXene composite catalyst is successfully prepared by microwaveassisted hydrothermal method to support the MXene on the CoFe2O4 and used for the activation of peroxymonosulfate (PMS). The structure, morphology and elemental valence states of the composite catalyst are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). It is found that CoFe2O4 is successfully loaded on MXene. Taking atrazine (ATZ) as the target pollutant, the effects of catalyst dosage, persulfate concentration, pH and other factors on the degradation of ATZ in the CoFe2O4/MXene activated PMS degradation system are studied. The results show that at pH=6. 35, the degradation of ATZ reaches 100% within 15 min when the amount of CoFe2O4/MXene (0. 1 g/L) and PMS (0. 37 mmol/L) are low. The quenching experiments show that both free radical and non-free radical pathways exist in the reaction system, in which SO4•−, O2•− and 1 O2 play a dominant role, which together acts on the degradation process of ATZ. This study has developed novel materials with excellent catalytic properties, which can provide new ideas for the degradation of organic pollutants by activated PMS over heterogeneous CoFe2O4/MXene catalysts. [ABSTRACT FROM AUTHOR]

Atrazine residues in farmland soil readily pose a threat to sensitive crops following crop rotation. Employing functional microorganisms to regulate pesticide degradation in crops has emerged as an effective strategy to alleviate phytotoxicity. This study investigated the effect of atrazine on the microbial community and the abundance of atrazine-degrading genes in the rice rhizosphere soil. Furthermore, one atrazine-degrading bacteria Pseudomonas sp. AT2 was isolated and purified from rhizosphere soil. Pot experiments were conducted to explore the effect and mechanism of strain AT2 on rice growth and atrazine degradation. The results showed that atrazine significantly altered the structure of rice rhizosphere bacteria while increasing the abundance of atrazine-degrading genes TrzN, AtzB, and AtzC in the rhizosphere soil. In the presence of atrazine, the inoculation of strain AT2 significantly improved shoot and root elongation, dry weight, and chlorophyll content, and reduced MDA content, indicating that AT2 could alleviate oxidative damage in rice. Moreover, inoculation with strain AT2 promoted the degradation of atrazine in both the soil (with 14.9% decrease) and rice (with 47.1%-57.5% decrease) compared to the control. Under atrazine stress, rice inoculated with AT2 exhibited upregulated expression of some genes involved in atrazine degradation, with transcript levels 1.3-2.7 times higher than control. These findings demonstrate that colonization of degrading strains can facilitate the degradation of atrazine in the "soil-rice" system by activating the expression of degradative genes. This process helps alleviate the phytotoxicity caused by atrazine residues in the environment. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Ecology & Rural Environment is the property of Journal of Ecology & Rural Environment Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A method for the determination of Benzo[a]pyrene and Atrazine in surface water by automatic solid phase extraction and high-performance liquid chromatography with double detector was developed. The contribution of uncertainty component was evaluated from four aspects: sample pretreatment process, sample repeatability determination, standard solution preparation and standard curve fitting. Among the four uncertainty components, the uncertainty introduced by standard curve fitting and sample pretreatment process has a great influence on the determination of Benzo[a]pyrene content. When the content of Benzo[a]pyrene in surface water was 2.01 ng/L, the extended uncertainty was 0.24 ng/L(k=2). In the determination of Atrazine content, the uncertainty introduced by standard solution preparation and sample repeatability determination has great influence on the results. When Atrazine content was 50.09 ng/L, the extended uncertainty was 4.72 ng/L(k=2). [ABSTRACT FROM AUTHOR]

Copyright of Environmental Science & Technology (10036504) is the property of Editorial Board of Environmental Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental Science & Technology (10036504) is the property of Editorial Board of Environmental Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Oil Crop Sciences is the property of Oil Crops Research Institute of Chinese Academy of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A series of simulated rainfall experiments were conducted to determine the interception effects of grass filter strip（GFS） established by bermuda, tall fescue and white clover on atrazine with weaker absorbability and chlorothalonil with stronger absorbability in surface runoff by comparison with control system（CS）, while the migration characteristics of the two kinds of pesticides with different absorbability were discussed. The results show that the outflow concentrations of dissolved and adsorbed atrazine are higher than that of chlorothalonil both from CS and GFS; compared with CS, the concentrations of dissolved atrazine and dissolved chlorothalonil from GFS are decreased by more than 60% and 6% respectively. The reduction of suspended particles amount from GFS is more than 94.70%, and the load reductions of adsorbed atrazine and chlorothalonil from GFS are more than 80% by comparison with CS. The study evidences that GFS can effectively intercept the pesticide carried both in solid and liquid phases, and vegetation is more important to atrazine interception. [ABSTRACT FROM AUTHOR]

Copyright of Asian Journals of Ecotoxicology is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Asian Journals of Ecotoxicology is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bulletin of Soil & Water Conservation is the property of Bulletin of Soil & Water Conservation Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

An online extraction of sunflower seed husk electrospray detection device was established. The sunflower seed husk was used as both sample extraction device and spray device. The sample extraction and electrospray mass spectrometry were combined organically, and the components in the sample were extracted and directly sprayed for detection without sample pretreatment, which greatly improved the detection efficiency. The melamine in milk powder, atrazine in soil, and α-caconine in potato were analyzed. The peaks of melamine and atrazine were good, and the lowest concentration detected reached 0.01 mg/kg. Because the sunflower seed husk was essentially an "electrophoresis pool" in a high electric field, and substances with different charges moved in the opposite direction, so that the target compound was desorbed from the matrix and was quickly extracted by the solvent, and this was the reason for its high sensitivity. The α-calconine in different positions of potato was detected, and a line graph was drawn according to the sampling position and signal intensity to analyze the spatial distribution of α-calconine in potato. It was found that the signal was the strongest in the sprouting area on the epidermis, and the signal strength gradually weakens as the distance became longer. Secondly, the signal intensity of the internal of potato decreased faster than the surface. The limit of detection reached 0.001 g. This method can not only quickly extract and detect target compounds of complex matrices samples, but also has application potential in mass spectrometry imaging. [ABSTRACT FROM AUTHOR]

Objective To compare PC-12 cells’apoptosis caused by the serotonin herbicides atrazine (ATR), simazine (SIM) and cyanazine (CYA). Methods The rat adrenal medullary pheochromoma PC-12 cell line was selected for routine culture. At the cell logarithmic growth phase, ATR, SIM and CYA were used at a concentration of 200 μmol/L for 24 h, respectively, and the same solvent was added in the control group. The CCK-8 method was used to detect the cell survival rate; the content of reactive oxygen species (ROS) in PC-12 cells was detected; the Real-time PCR and Western blotting methods were used to detect the mRNA and protein expressions of Bax, p53, Bcl-2 and Caspase-3. Results Compared with that in the control group， the survival rate of the cells in ATR group， SIM group and CYA group was significantly decreased. The intracellular ROS activity of the three groups was significantly increased, and the mRNA and protein expressions of Bax，p53 and Caspase-3 were increased. mRNA and protein expressions of Bcl-2 were significantly reduced （P<0. 01) . Compared with that in ATR group， the cell survival rate of SIM group and CYA group was significantly increased, the intracellular ROS activity of the two groups was significantly decreased， the expressions of Bax, p53 and Caspase-3 mRNA and protein were significantly reduced, and the expressions of Bcl-2 mRNA and protein were significantly increased (P<0. 01). Compared with that of SIM group， the cell survival rate of CYA group was significantly increased， while the intracellular ROS activity was significantly decreased; the Bax， p53 and Caspase-3 mRNA and protein expressions were significantly reduced， and Bcl-2 mRNA and protein expressions were significantly increased (P<0. 01）. Conclusion ATR，SIM and CYA can all promote PC-12 cells’apoptosis; ATR has the strongest effect while CYA has the weakest effect. [ABSTRACT FROM AUTHOR]

Copyright of Asian Journals of Ecotoxicology is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

There are many types of organic pollutants in water, which exert great threat to human health. Developing highly efficient and precise quantification method for their detections is very important. The acrylamide, bentazone, 2, 4-D, dimethoate, picric acid, benzidine, pentachlorophenol, carbofuran, carbaryl, atrazine, demeton, malathion, parathion and chlorpyrifos ar e 14 types of important organic pollutants, which are highly harmful to human body and thereby are included in important- quality- control indicators of current standard regulations, such as Environmental Quality Standards for Surface Water (GB3838- 2002), Standards for Drinking Water Quality (GB5749- 2006) and Quality Standard for Ground Water (GB/ T l4848- 2017 ) in China. According to the specified examination methods of these standards, they commonly need enrichment of large volume of water samples before the further analysis. However, there are many drawbacks for such pretreatment: 1) The process is lengthy. 2) It can exhaust large amounts of reagents. 3) Sometimes it can produce false positive results. 4) What is even worse is being harmful for the experimenter's health. Liquid chromatography-tandem mass spectrometry is a qualitative and quantitative analysis method with high sensitivity, good selectivity and fast analysis speed, which is becoming more and more popular for the determination of trace level of organic pollutants. The direct injection method based on liquid chromatography-tandem mass spectrometry has been applied in some organic pollutants examinations. However, there are still no reports on simultaneous determination of these 14 organic pollutants using direct injection method. In this study, a method of direct injection-ultra high performance liquid chromatography-tandem mass spectrometry ( UPLC-MS/ MS) was developed for simultaneously determination of these 14 organic pollutants. Additionally, the dynamic multiple reaction monitoring (DMRM) mode was applied in UPLC-MS/ MS, which could dynamically allocate the retention time window of each target compound, significantly adjust the loading cycle time of multiple compounds and improve the analysis efficiency. Specifically, the water samples were filtered through 0. 22 µm of microfiltration membrane and gradient eluted with ammonium acetate and acetonitrile. The flow rate was 0. 3 mL/ min and the column temperature was 40 °C. The samples were detected by DMRM mode using positive and negative electrospray ionization (ESI+), and the 14 isotope internal standards were used for quantification by internal standard method. The calibration curves of the organic pollutants showed good linearity with the correlation coefficients (R2 ) over 0. 999 0. The limit of detection was 0. 01-0. 05 µg/ L, and the limit of quantitative was 0. 05-0. 10 µg/ L. The average recoveries at three spiked levels we re 77. 9%- 114% in different environmental water samples, and the RSD ranged from 0. 2 % to 14. 1% (n =6) . This method is simple, rapid, and high sensitivity, which is suitable for detection of 14 organic pollutants in the surface, underground and drinking water. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The status quo of the research on atrazine in water environment was described. The worldwide water pollution status of atrazine was summarized, and the toxic influences of atrazine on plants, animals and human beings were analyzed detailly. The treatment technologies for atrazine in the contaminated water were analyzed emphatically, and the advantages and disadvantages of these technologies were discussed. Furthermore, some suggestions for the treatment research of atrazine in contaminated water environment were proposed for pollution control direction in the future. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objectives]The purpose of this study was to construct a magnetic nanoprobe and apply it to the fluorescent detection of atrazine. [Methods]The magnetic nanomaterial was firstly synthesized according to the hydrothermal method. A partially complementary DNA duplex was then constructed by the atrazine aptamer and a fluorescein-labeled DNA single strand and assembled on the magnetic nanomaterial. Upon the functionalization with the DNA duplex, the resultant fluorescent magnetic nanoprobe for the specific detection of atrazine was characterized by the ultraviolet spectroscopy and transmission electron microscopy. The atrazine-triggered release of the fluorescein-labeled DNA through the strong specific affinity between atrazine and its aptamer was confirmed by the polyacrylamide gel electrophoresis(PAGE)analysis. The release resulted in the unlocking of fluorescence quenching between the nanomaterials and the fluorescein, “turning” on the fluorescence for the sensitive quantitation of atrazine by the signal change of fluorescence spectroscopy. [Results]Atrazine was determined by fluorescence in the range of 0.01-20 μg·mL-1,with the correlation coefficient(R2)of 0.998. The detection limit was 8.17 μg·L-1. The nanoprobe showed high selectivity against atrazine compared with other pesticides and efficient anti-interference ability. The average recoveries of atrazine ranged from 95.48% to 102.03% with relative standard deviations(RSD)of 2.17% to 3.14% in the paddy water. The spiked recoveries of atrazine in paddy soil ranged from 94.79% to 100.66% with RSD of 3.40% to 4.72%. [Conclusions]The established fluorescent quantitative method for atrazine was simple but effective and had the sensitivity and accuracy to meet the requirements of pesticide residue analysis in the environment. [ABSTRACT FROM AUTHOR]

To clarify the phytotoxicity of nicosulfuron and atrazine residues in the soil of corn fields on the growth of sweetpotato in the next year, the soil samples from sweetpotato fields were collected from Mancheng District of Baoding City, Wen’an County, Bazhou City and Gaocheng District of Shijiazhuang City of Hebei Province. The QuEChERS with ultra-performance liquid chromatographymass spectrometry (UPLC-MS/MS) was used to determine their residues. The phytotoxicity of nicosulfuron, atrazine and their mixture in the soil on sweetpotato was evaluated in the pot experiments. The results showed that the residues of nicosulfuron in the soil of sweetpotato fields in Mancheng District of Baoding City, Wen’an County, and Bazhou City, of Hebei Province with severe phytotoxicity were 11.80-87.97 μg/kg soil, and the atrazine residues were 2.71-8.40 μg/kg soil. Only atrazine with the contents of 3.43-4.42 μg/kg soil was detected in the non-phytotoxic sweetpotato field in Gaocheng District of Shijiazhuang City, Hebei Province. The results of pot experiments with different herbicide treatments showed phytotoxic symptoms of sweetpotato 20 days after the treatment of 1 μg or more nicosulfuron per kilogram of soil. The IC50 value of nicosulfuron to roots was 3.74 μg/kg soil, while the IC10 value was 1.27 μg/kg soil. Atrazine in the range of 2-40 μg/kg soil have no visible phytotoxicity on the aboveground and underground parts of sweetpotato, but have slight inhibitory effect on the growth of the root system. The combination of nicosulfuron and atrazine in the ratio of 10 : 1, 5 : 1, 5 : 2 and 5 : 5 had antagonistic effect on sweetpotato phytotoxicity. Their co-toxicity coefficients CTC50 value were 66.25, 59.16, 61.30 and 79.47, respectively. The phytotoxic symptoms of nicosulfuron to sweetpotato included plants stunted, leaf blade smaller, whole plant or new leaves yellowish, rootlet development reduced, lateral roots short and thick. These results suggested that nicosulfuron is the main factor caused the phytotoxicity of sweetpotao, and its phytotoxic threshold was 1 μg/kg soil. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Jilin University (Science Edition) / Jilin Daxue Xuebao (Lixue Ban) is the property of Zhongguo Xue shu qi Kan (Guang Pan Ban) Dian zi Za zhi She and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Xingkai Lake, located in Heilongjiang Province, is an important fishery and agricultural base and is seriously polluted by agricultural non-point sources. To clarify the residual status of many pesticides in the surface water of Xingkai Lake, 27 types of pesticides, herbicides, and their degradation products were analyzed in rice paddy, drainage, and surface water around Xingkai Lake (China) during the rice heading and maturity periods. The results showed that all 27 types of pesticides, herbicides, and their degradation products were detected during the rice heading period, and the total concentration ranged from 247.97 to 6 094.49 ng·L -1 . Additionally, 25 species were detected during the rice maturity period, and the total concentration ranged from 485.36 to 796.23 ng·L -1 . In comparison, more pesticides, herbicides, and derived degradation products were detected during the heading period, and their total concentration was higher as well. During the rice heading period, atrazine, simetryn, and paclobutrazol were the main detected pesticides, atrazine and isoprothiolane were the main pesticides detected during the maturity period. The distribution characteristics of pesticides and herbicides in the surface water around Xingkai Lake (China) was similar to that in drainage, so they were probably imported from the drainage and rice paddy. The average risk quotient (RQ) values of atrazine, simetryn, prometryn, butachlor, isoprothiolane, and oxadiazon were higher than 0.1 in drainage and Xingkai Lake (China), which showed a potential risk to aquatic organisms.

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Asian Journals of Ecotoxicology is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Asian Journals of Ecotoxicology is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

4-Chloro-2-methylphenoxyacetic acid (MCPA) is a widely used herbicide with high biological toxicity in ferralsol. Sorption is a key process that regulates the behavior of MCPA migration and conversion in soil. In order to evaluate the sorption behavior of MCPA in ferralsol, a simple and sensitive high performance liquid chromatographic method (HPLC) for the determination of MCPA in solution was developed with C18 column and PDA detector set at 280 nm. The mobile phase consisted of a mixture of 80 : 20 (V/V) methanol and distilled water (adjusted to pH value 2.5 with acetic acid). The sorption isotherm experiment was also conducted. The results showed that good linear relationships (R2= 0.999 9) between HPLC peak area and the concentration of MCPA was obtained in the range from 0.5 to 40 mg/L. Detection limits (LOD) and quantitation Limit (LOQ) were 0.2 mg/L and 0.5 mg/L, respectively. Satisfactory relative recoveries ranging from 98% to 103% were achieved with relative standard deviations of 3.5%-4.0%. Those results demonstrated that the HPLC method was suitable for the evaluation of MCPA sorption. The isotherm data of MCPA sorption in ferralsols were fitted well by Freundlich model with △G<0 and /△G/ =9.34-14.73 kJ/mol, which suggested that MCPA sorption on the ferralsols was an spontaneous, exothermic and anisotropic process dominated by physical forces. The value of Kf for MCPA ranged from 0.85 to 4.24 L/kg, which revealed that MCPA was difficult to be adsorbed by soils. It may further cause a potential environmental risk to groundwater. Moreover, diverse sorption capacity of MCPA was observed among three types of ferralsols in the following order: paddy soil > rhodic ferralsol > haplic ferralsol, which was closely related to the soil pH, organic matter and mineral. The sorption process was dominated by hydrogen bonding and dipole interaction. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective] Based on glyphosate-tolerant transgenic maize ‘Tkang-4’ and untransformed receptor inbred line ‘ 18599’. [Method] The comprehensive agronomic character evaluation of ‘ Tkang-4’ and tolerance to non-target herbicides were carried out. [Result] There was no difference between ‘Tkang-4’ and ‘ 18599’ in main agronomic characters. In this study, common herbicide for maize such as Nico-sulluron, Nitrosulfonate-atrazine,maize sensitive herbicide Quizalofop-P and non-selective and sterile herbicide Glufosinate ammonium were selected as non-target herbicide, and the results indicated dial the effects of non-target herbicides on 18599 and Tkang-4 were similar under 1 × and 2 × recommended concentration herbicides treatment. [Conclusion] Firstly, only glyphosate showed significant difference between die transgenic transformation ‘Tkang-4’ and maize inbred 4 18599’ , secondly, glyphosate-tolerant transgenic maize ‘Tkang-4’ could be controlled and killed bv maize sensitive herbicide Quizalofop-P and non-selective and sterile herbicide Glufosinate ammonium, which ensured die environmental safety of transformant. Finally, ibis study provided basic experimental data for die safety evaluation of maize transformant ‘ Tkang-4 ’ . [ABSTRACT FROM AUTHOR]

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Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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A kind of green solvent, ionic liquid, was introduced as an extracting agent, and a new method of dispersive liquid-liquid microextraction based on ultrasonic-assisted in situ ionic liquid formation (DLLM-UAISLF) was established for the High Performance Liquid Chromatography (HPLC) determination of atrazine in water. Five mL of water was treated using 80 μL of [HMim]Cl as the extracting agent, 400 μL of LiNTf2 as the ion-exchange material, ultrasound time of 10 minutes and centrifuge time of 8 minutes at 4000 r/min. During this process, the droplets of ionic liquid [HMim]NTf2 were formed in water and the precipitates were then separated for determination of atrazine by HPLC. The detection limit of atrazine is 0.01 mg/L and the detection values range from 0.01 to 0.5 mg/L. The proposed method yielded recoveries of 100.4%-106.7%, which are obviously better than those ( < 67%) of direct liquid-liquid microextraction. This method has potential in the determination of organic pollutants.

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Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)