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.

scholarly journals Photocatalytic degradation of indigo carmine by ZnO photocatalyst under visible light irradiation

2017 ◽  
Vol 14 (3) ◽  
pp. 582-587
Author(s):  
Baghdad Science Journal
Keyword(s):  
Zinc Oxide ◽  
Photocatalytic Degradation ◽  
Indigo Carmine ◽  
Catalyst Loading ◽  
Order Kinetic ◽  
Kinetic Reaction ◽  
First Order ◽  
Pseudo First Order ◽  
The Relationship ◽  
Influential Parameters

In this work, the photocatalytic degradation of indigo carmine (IC) using zinc oxide suspension was studied. The effect of influential parameters such as initial indigo carmine concentration and catalyst loading were studied with the effect of Vis irradiation in the presence of reused ZnO was also investigated. The increased in initial dye concentration decreased the photodegradation and the increased catalyst loading increased the degradation percentage and the reused-ZnO exhibits lower photocatalytic activity than the ZnO catalyst. It has been found that the photocatalytic degradation of indigo carmine obeyed the pseudo-first-order kinetic reaction in presence of zinc oxide. This was found from plotting the relationship between ln (C0/Ct) and irradiation the rate constant of the process.UV- spectrophotometer was used to study the indigo carmine photodegradation.

scholarly journals The Reconfiguration of the Theatre Space and the Relationship between Public and Private in the Case of Apartment Theatre

2017 ◽  
Vol 18 (3) ◽  
pp. 77
Author(s):  
Andreea Gabriela Lupu
Keyword(s):  
Empirical Investigation ◽  
Spatial Configuration ◽  
Participant Observation ◽  
Domestic Space ◽  
Public And Private ◽  
The Public ◽  
Artistic Production ◽  
The Relationship ◽  
Artistic Product

<p>This article tackles the means of theatre space reconfiguration in the apartment theater (<em>lorgean theater</em>), simultaneously analyzing the relation between public and private specific to this form of art. Structured around both a theoretical analysis and a qualitative empirical investigation, this paper emphasizes the traits of the theatre space as component of an artistic product received by the audience, and its value in the process of artistic production, within the theatre sector. The case study of <em>lorgean theater, </em>including a participant observation and an individual interview, enables the understanding of these two aspects of the spatial configuration, emphasizing its hybrid nature in terms of spatial configuration and the public-private relation as well as the act of reappropriation of the domestic space through an alternative practice of theatre consumption.</p>

Space Syntax Approach for Articulating Space and Social Life

2019 ◽  
pp. 223-249 ◽  
Author(s):  
Abdelbaseer A. Mohamed
Keyword(s):  
Social Network ◽  
Urban Environment ◽  
Urban Space ◽  
Social Life ◽  
Spatial Configuration ◽  
Space Syntax ◽  
Urban Models ◽  
Spatial Measures ◽  
The Relationship ◽  
The Way

This chapter sets out to provide a detailed description of the relationship between space and society. It begins by discussing how people co-live in spaces and how such spaces co-live as communities. Understanding the relationship between space and society requires shedding light on how (1) communities emerge and work and (2) people build their social network. The chapter's main premise is that spatial configuration is the container of activities and the way we construct our cities influences our social life. Therefore, the urban environment should be analyzed mathematically using urban models in order to evaluate and predict future urban policies. The chapter reviews a space-people paradigm, Space Syntax. It defines, elaborates, and interprets its main concepts and tools, showing how urban space is modelled and described in terms of various spatial measures including connectivity, integration, depth, choice, and isovist properties.

scholarly journals Built environment and autism: towards a set of spatial requirements for autism friendly cities

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
G Tola ◽  
V Talu ◽  
J Lindert
Keyword(s):  
Built Environment ◽  
Urban Environment ◽  
Functional Organization ◽  
Spatial Configuration ◽  
Autism Spectrum ◽  
Urban Environments ◽  
Urban Planning And Design ◽  
Wide Variability ◽  
The Relationship ◽  
Spatial Needs

Abstract Background The opportunity for people functioning in an atypical way to autonomously and fully interact with the city is often compromised or denied, due to the gap between their specific spatial needs and the physical and functional organization of the urban environment. The need to reconsider the living environments taking into account the vast diversity of people gained an increasing importance in the overall debate and specifically in the field of urban planning and design. The research aims at investigating the relationship between the urban environment and people with Autism Spectrum Disorder (ASD). Methods A scoping review of current available original studies research exploring the relationship between autism and built environment was conducted. PubMed, Scopus, PsychInfo and Web Of Science where searched. Studies included provided spatial requirements for designing autism friendly environment. Results In total, 801 studies were identified and 22 were included. Current researches and applications investigating the role of spatial configuration as a means for improving the autonomy of people with ASD almost exclusively focus on closed and dedicated spaces (residences, schools, care facilities, healing gardens) mostly devoted to children. Starting from this and the data collected, a first set of enabling urban spatial requirements addressing the atypical urban functioning of people with ASD - the reduction of sensory overload and the use of visual supports - in order to promote their possibility to walk autonomously and safely across the everyday city is proposed. Conclusions Despite the wide variability of the spectrum which makes it very difficult to define effective design criteria for all people with ASD, it's possible to identify a set of recurrent spatial needs. Furthermore, designing cities for people with ASD can also contribute to healthier and more inclusive urban environments for other groups of vulnerable inhabitants.

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
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