Dynamics of pesticide residues in the autumn Chinese cabbage (Brassica chinensis L.) grown in open fields

2006 ◽  
Vol 62 (4) ◽  
pp. 350-355 ◽  
Author(s):  
Zhi-Yong Zhang ◽  
Cun-Zheng Zhang ◽  
Xian-Jin Liu ◽  
Xiao-Yue Hong
Keyword(s):  
Chinese Cabbage ◽  
Pesticide Residues ◽  
Brassica Chinensis ◽  
Open Fields

scholarly journals Photocatalytic Degradation of Profenofos and Triazophos Residues in the Chinese Cabbage, Brassica chinensis, Using Ce-Doped TiO2

Catalysts ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 294 ◽  
Author(s):  
Xiangying Liu ◽  
You Zhan ◽  
Zhongqin Zhang ◽  
Lang Pan ◽  
Lifeng Hu ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Chinese Cabbage ◽  
Spatial Configuration ◽  
Atomic Charge ◽  
Ultra Performance Liquid Chromatography ◽  
Organophosphate Pesticides ◽  
Brassica Chinensis ◽  
Synthetic Pesticides ◽  
The Relationship ◽  
Mulliken Atomic Charge

Pesticides have revolutionized the modern day of agriculture and substantially reduced crop losses. Synthetic pesticides pose a potential risk to the ecosystem and to the non-target organisms due to their persistency and bioaccumulation in the environment. In recent years, a light-mediated advanced oxidation processes (AOPs) has been adopted to resolve pesticide residue issues in the field. Among the current available semiconductors, titanium dioxide (TiO2) is one of the most promising photocatalysts. In this study, we investigated the photocatalytic degradation of profenofos and triazophos residues in Chinese cabbage, Brassica chinensis, using a Cerium-doped nano semiconductor TiO2 (TiO2/Ce) under the field conditions. The results showed that the degradation efficiency of these organophosphate pesticides in B. chinensis was significantly enhanced in the presence of TiO2/Ce. Specifically, the reactive oxygen species (ROS) contents were significantly increased in B. chinensis with TiO2/Ce treatment, accelerating the degradation of profenofos and triazophos. Ultra-performance liquid chromatography–mass spectroscopy (UPLC-MS) analysis detected 4-bromo-2-chlorophenol and 1-phenyl-3-hydroxy-1,2,4-triazole, the major photodegradation byproducts of profenofos and triazophos, respectively. To better understand the relationship between photodegradation and the molecular structure of these organophosphate pesticides, we investigated the spatial configuration, the bond length and Mulliken atomic charge using quantum chemistry. Ab initio analysis suggests that the bonds connected by P atom of profenofos/triazophos are the initiation cleavage site for photocatalytic degradation in B. chinensis.

Application of an Endophyte Enterobacter sp. TMX13 to Reduce Thiamethoxam Residues and Stress in Chinese Cabbage (Brassica chinensis L)

2020 ◽  
Vol 68 (34) ◽  
pp. 9180-9187
Author(s):  
Wenfeng Wang ◽  
Qun Wan ◽  
Yixin Li ◽  
Jing Ge ◽  
Fayun Feng ◽  
...  
Keyword(s):  
Chinese Cabbage ◽  
Brassica Chinensis

A note on the electron microscopy of the turnip yellow mosaic virus

Parasitology ◽  
1953 ◽  
Vol 43 (3-4) ◽  
pp. 191-192 ◽  
Author(s):  
Kenneth M. Smith
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Mosaic Virus ◽  
Chinese Cabbage ◽  
Hollow Spheres ◽  
Yellow Mosaic Virus ◽  
Turnip Yellow Mosaic Virus ◽  
Hollow Particles ◽  
Brassica Chinensis ◽  
Virus Particles

An attempt to differentiate by means of the electron microscope between particles of the top and bottom components of the turnip yellow mosaic virus is described. Since the particles of the top component are thought to be hollow spheres, it might be expected that they would collapse after drying and thus throw a smaller shadow than the particles of the bottom component which are thought to have a more solid centre. No difference could be perceived between the two types of particle, so that the apparently hollow particles can withstand the effect of drying without collapsing.Sections were cut of leaves of Chinese cabbage (Brassica chinensis) and particles were observed inside the cells which could conceivably be virus particles.

scholarly journals Morphology and anatomy of vegetative perko organs with reference to their fodder value

2013 ◽  
Vol 34 (1) ◽  
pp. 69-88
Author(s):  
H. Dalkiewicz-Baranowska ◽  
M. Wilczyńska
Keyword(s):  
Chinese Cabbage ◽  
Brassica Campestris ◽  
Anatomical Structure ◽  
Point Of View ◽  
Forage Crop ◽  
Brassica Chinensis ◽  
Vascular Tissues ◽  
Herbage Yield ◽  
Feeding Value

A new forage crop - perko is a hybrid of tetraploid winter tumiplike rapa (<i>Brassica campestris</i> L.) × tetraploid chinese cabbage (<i>Brassica chinensis</i> L.). Young perko plants grow slowly, at a later period their herbage yield rapidly increases, therefore they can be cut as fodder after 60 days of vegetation. The anatomical structure of perko plants shows features characteristic for <i>Cruciferae</i>, particularly those of the genus <i>Brassica</i>. The good feeding value of this plant is indicated by its anatomical structure: a large proportion of parenchymal tissues and low proportion of vascular tissues with only few lignified elements, the occurrence of colenchyma as supporting tissue and the absence of sclerenchyma. Therefore in the crude fibres the proportion of completely indigestibile parts is small since the tissues contain but scarce lignified andcutinised walls. It may be concluded there from that the content of structure-forming tissues in perko is favourable from the point of view of digestibility.

Monitoring of 160 Kinds of Pesticide Residues in Commercial Baechu (Chinese) Cabbage Throughout the Year

2009 ◽  
Vol 38 (7) ◽  
pp. 970-975 ◽  
Author(s):  
So-Yeon Park ◽  
Ji-Kang Jung ◽  
Jeong-Mi Kang ◽  
So-Hee Kim ◽  
Ji-Young Yang ◽  
...  
Keyword(s):  
Chinese Cabbage ◽  
Pesticide Residues
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