Zhejiang Chemical Industry Research Institute

Hangzhou, China

Zhejiang Chemical Industry Research Institute

Hangzhou, China
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Tang W.,Zhejiang Chemical Industry Research Institute | Zhou F.,Anhui Academy of Agricultural Sciences | Chen J.,Zhejiang Chemical Industry Research Institute | Zhou X.,Sichuan Academy of Agricultural science
Pesticide Biochemistry and Physiology | Year: 2014

Asia minor bluegrass (Polypogon fugax) is a common annual grass weed of winter crops distributed across China. We conducted a study on the resistance level and the mechanism of resistance to ACCase-inhibiting herbicides in a P. fugax population from China. Whole-plant dose-response experiments in greenhouse showed that the resistant P. fugax population was 1991, 364, 269, 157, and 8-fold resistant to clodinafop-propargyl, fluazifop-p-butyl, haloxyfop-R-methyl, quizalofop-p-ethyl and fenoxaprop-p-ethyl relative to the reference susceptible population, which was susceptible to all the five AOPP herbicides. Much lower R/S values of 3.5, 2.4 and 3.5, respectively, were detected for clethodim, sethoxydim and pinoxaden. Molecular analysis of resistance confirmed that the Ile2041 to Asn mutation in the resistant population conferred resistance to AOPP herbicides, but not to CHD and DEN herbicides. This is the first report of a target site mutation that corresponded to resistance to AOPP herbicides in P. fugax. Proper resistance management practices are necessary to prevent ACCase-inhibiting herbicides from becoming ineffective over wide areas. © 2013 Elsevier Inc.


Tang W.,Zhejiang Chemical Industry Research Institute | Zhou F.,Anhui Academy of Agricultural Sciences | Zhang Y.,Anhui Academy of Agricultural Sciences | Chen J.,Zhejiang Chemical Industry Research Institute
Pesticide Biochemistry and Physiology | Year: 2015

American sloughgrass [. Beckmannia syzigachne (Steud.) Fernald] is a problematic annual grass weed in winter wheat fields of China, which causes great loss of wheat yield. Repeated use of acetyl-CoA carboxylase (ACCase)-inhibiting herbicides during the last two decades to control this weed has been selected for resistance in American sloughgrass in Jiangsu province. In this study, whole-plant dose-response assays were conducted to investigate the level of resistance in four resistant American sloughgrass populations (LY, JH, BYJ and BYP) to four ACCase-inhibiting herbicides belonging to aryloxyphenoxypropionates, cyclohexanediones, and phenylpyrazolines groups under greenhouse conditions. Based on resistance factor (RF), three populations, LY, BYJ and BYP, were highly resistant to fenoxaprop-P-ethyl, clodinafop propargyl, sethoxydim and pinoxaden. JH plants exhibited resistance to fenoxaprop-P-ethyl and clodinafop propargyl, but showed much lower RF values for sethoxydim and pinoxaden. Molecular analysis of resistance revealed that resistance in all the four populations was target site-based. Results confirmed that substitutions of Ile-1781-Leu, Ile-2041-Asn and Asp-2078-Gly, respectively, in LY, JH and BYJ/BYP, are responsible for diverse sensitivity to different ACCase-inhibiting herbicides in these populations. The substitution at position 1781 had been reported, while it is the first report of Ile-2041-Asn and Asp-2078-Gly mutations that corresponded to resistance in American sloughgrass. © 2015.


PubMed | Zhejiang Chemical Industry Research Institute and Anhui Academy of Agricultural Sciences
Type: | Journal: Pesticide biochemistry and physiology | Year: 2015

American sloughgrass [Beckmannia syzigachne (Steud.) Fernald] is a problematic annual grass weed in winter wheat fields of China, which causes great loss of wheat yield. Repeated use of acetyl-CoA carboxylase (ACCase)-inhibiting herbicides during the last two decades to control this weed has been selected for resistance in American sloughgrass in Jiangsu province. In this study, whole-plant dose-response assays were conducted to investigate the level of resistance in four resistant American sloughgrass populations (LY, JH, BYJ and BYP) to four ACCase-inhibiting herbicides belonging to aryloxyphenoxypropionates, cyclohexanediones, and phenylpyrazolines groups under greenhouse conditions. Based on resistance factor (RF), three populations, LY, BYJ and BYP, were highly resistant to fenoxaprop-P-ethyl, clodinafop propargyl, sethoxydim and pinoxaden. JH plants exhibited resistance to fenoxaprop-P-ethyl and clodinafop propargyl, but showed much lower RF values for sethoxydim and pinoxaden. Molecular analysis of resistance revealed that resistance in all the four populations was target site-based. Results confirmed that substitutions of Ile-1781-Leu, Ile-2041-Asn and Asp-2078-Gly, respectively, in LY, JH and BYJ/BYP, are responsible for diverse sensitivity to different ACCase-inhibiting herbicides in these populations. The substitution at position 1781 had been reported, while it is the first report of Ile-2041-Asn and Asp-2078-Gly mutations that corresponded to resistance in American sloughgrass.


Wen Y.,Zhejiang University | Wen Y.,Zhejiang Chemical Industry Research Institute | Shen C.,Zhejiang University | Ni Y.,Zhejiang University of Technology | And 2 more authors.
Journal of Hazardous Materials | Year: 2012

There is a need to explore effective and green approaches to enhancing the ability to use chitosan for contaminant removal for practical implementation of this technology. In the present study, glow discharge plasma (GDP), which has thus far been studied for degradation of contaminants, was used for the first time to pre-treat chitosan for dye removal in aqueous solution. The results show that the GDP treatment changed the morphology and crystallinity of chitosan particles, and the number of -CH 2 and -CH 3 groups in the chitosan samples increased. Various pretreatment parameters, including discharge current and time, played significant roles in the chitosan modification. It is observed that dye uptake in GDP-modified chitosan was faster than adsorption in untreated chitosan. The maximum adsorption by chitosan followed the order of untreated chitosan


Tang W.,Zhejiang Chemical Industry Research Institute | Xu X.,Zhejiang Chemical Industry Research Institute | Shen G.,Shaoxing Academy of Agricultural science | Chen J.,Zhejiang Chemical Industry Research Institute
Weed Science | Year: 2015

The influence of environmental factors on germination and emergence of aryloxyphenoxy propanoate herbicide-resistant (AR) and -susceptible (AS) Asia Minor bluegrass were studied in laboratory and greenhouse experiments. Seeds were collected from AR and AS plants cultivated in separate greenhouses under the same environmental conditions. The results revealed that optimum temperatures for the germination of AS biotype were 10 to 25 C or alternating temperature of 15/5 to 30/20 C and light was not necessary. However, maximum germination occurred at 10 C or 15/5 C, and no germination occurred above 15 C or 25/15 C for the AR biotype. The AS Asia Minor bluegrass was consistently more tolerant to environmental stress, as evidenced by their greater germination at same pH value, osmotic potential, and NaCl concentration at 15/5 C compared to the AR biotype. Higher emergence rates were obtained when seeds were sown on the surface of soil for both biotypes. Emergence percentage of the AR biotype was below 14% when buried, whereas the AS biotype had 20% emergence at 2.5 cm burial depth. It is concluded that several environmental factors affect the germination of Asia Minor bluegrass, and the AS biotype showed higher germination percentage and a wider adaptive range under same treatments compared with the AR biotype. Due to the reduced emergence at depth, deep tillage could be an effective management to reduce AR Asia Minor bluegrass infestation in the following crop. © 2015 Weed Science Society of America.


Wu J.-L.,Fudan University | Chen M.,Fudan University | Chen M.,Zhejiang Chemical Industry Research Institute | Liu Y.-M.,Fudan University | And 3 more authors.
Catalysis Communications | Year: 2013

A series of mesoporous β-Ga2O3 with high surface area have been prepared using eco-friendly sucrose as a non-surfactant template and studied in relation to their performance in the dehydrogenation of propane to propylene in the presence of CO2. Among the four sucrose-derived samples tested, the material prepared from a sucrose/Ga2O3 molar ratio of 4 achieved the highest propane conversion, which was approximately the double efficiency of the conventional β-Ga 2O3. The enhanced activity of the sucrose-derived materials is attributed to a high abundance of coordinative unsaturated surface Ga sites as a consequence of their favorable textural properties and enhanced surface areas. © 2012 Elsevier B.V.


Chen M.,Fudan University | Chen M.,Zhejiang Chemical Industry Research Institute | Wu J.-L.,Fudan University | Liu Y.-M.,Fudan University | And 4 more authors.
Applied Catalysis A: General | Year: 2011

Two series of binary In2O3/MOx (M = Al, Zr, Si) catalysts with low (3 wt%) and high (10 wt%) In2O3 loadings were prepared via an incipient wetness impregnation method. The support effect has been investigated in detail by testing the propane dehydrogenation (PDH) reaction both in the presence and absence of CO 2. Physico-chemical properties including surface composition, redox and acidic/basic properties of the supported In2O3 were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, H 2 temperature-programmed reduction, NH3 and CO2 temperature-programmed desorption, respectively. It was demonstrated that a higher population of the specific highly dispersed In2O3 species on support is favorable for propylene production, and the maximum propylene yield was achieved with the high-loading In2O 3/Al2O3. Properties including high In 2O3 dispersion and balanced acidic/basic properties, rendering synergism between dehydrogenation and reverse water gas shift, are essential for achieving high catalytic performance of PDH. © 2011 Elsevier B.V. All rights reserved.


Chen M.,Fudan University | Chen M.,Zhejiang Chemical Industry Research Institute | Wu J.-L.,Fudan University | Liu Y.-M.,Fudan University | And 2 more authors.
Catalysis Communications | Year: 2011

Dehydrogenation of propane coupled with N2O over a series of binary In2O3 - Al2O3 mixed oxides was investigated. In contrast to the poor performance for sole N2O decomposition, a remarkable synergy was identified between N2O decomposition and propane dehydrogenation. Among the catalysts tested, the In2O3 - Al2O3 sample containing a 20 mol% In2O3 showed the highest activity for propane dehydrogenation in the presence of N2O. Moreover, stability far superior to those of the conventional iron-based materials was observed, attributable to the moderate surface acidity of the In - Al - O composite. The essential role of N2O is suggested to generate active oxygen species facilitating propane dehydrogenation. © 2011 Elsevier B.V. All rights reserved.


Hang X.-C.,CAS Shanghai Institute of Organic Chemistry | Gu W.-P.,CAS Shanghai Institute of Organic Chemistry | Chen Q.-Y.,CAS Shanghai Institute of Organic Chemistry | Xiao J.-C.,CAS Shanghai Institute of Organic Chemistry | And 2 more authors.
Journal of Fluorine Chemistry | Year: 2011

Both experimental and computational approaches have been employed in the present work to investigate the thermal conversion of substituted difluoro(methylene)cyclopropanes (F2MCP) E-1,1-difluoro-2,2-dimethyl- 3-tosylmethylene cyclopropane 1, to the thermodynamically more stable F 2MCP products, 1,1-difluoro-2-tosyl-3-(propan-2-ylidene)cyclopropane 2, and 1-(3-(difluoromethylene)-2,2-dimethylcyclopropylsulfonyl)-4-methylbenzene 3. The X-ray crystal structure has been obtained for both 1 and 2, respectively, based on which theoretical analyses on their structure and stability have been carried out. Possible reaction mechanisms are proposed. © 2010 Elsevier B.V. All rights reserved.


Rao Q.,Huazhong Agricultural University | Rao Q.,Beijing Academy of Agriculture and Forestry Sciences | Xu Y.-H.,Zhejiang Chemical Industry Research Institute | Luo C.,Beijing Academy of Agriculture and Forestry Sciences | And 5 more authors.
Journal of Integrative Agriculture | Year: 2012

Four strains of the Q biotype and one of the B biotype of the whitefly Bemisia tabaci collected from China were characterised for resistance to four neonicotinoid insecticides and pymetrozine. Q biotype strains showed moderate to strong resistance to imidacloprid, thiamethoxam and acetamiprid, but little or no cross-resistance to dinotefuron. Resistance to neonicotinoids was consistently associated with resistance to pymetrozine, despite the latter having a distinct (though unresolved) mode of action. The single B biotype strain proved largely susceptible to all the insecticides investigated. Resistance in the Q biotype strains was associated with over-expression of a cytochrome P450 monooxygenase gene, CYP6CM1, whose substrate specificity presumably accounts for the observed cross-resistance profiles. © 2012 Chinese Academy of Agricultural Sciences.

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