31 research outputs found
Table_1_Destination image, nostalgic feeling, flow experience and agritourism: An empirical study of Yunling Tea Estate in Anxi, China.XLSX
This study introduces destination image, nostalgic feeling, and flow experience into tea estate tourism and constructs a theoretical model that includes destination image, nostalgic feeling, flow experience, cultural identity, and tourists’ behavioral intention. Then, an empirical study is conducted with tourists at Yunling Tea Estate in Anxi, China. The results show that all hypotheses are supported except the hypothesis pertaining to the significance of the influence of flow experience on behavioral intention, which is not supported. The model includes eight mediating effects and one moderating effect that is influenced by cultural memory.</p
Graphene as dispersive solidphase extraction materials for pesticides LC-MS/MS multi-residue analysis in leek, onion and garlic
<div><p>A multi-residue analytical method was validated for 24 representative pesticides residues in onion, garlic and leek. The method is based on modified QuEChERS sample preparation with a mixture of graphene, primary secondary amine (PSA), and graphitised carbon black (GCB) as reversed-dispersive solid-phase extraction (r-DSPE) material and LC-MS/MS. Graphene was first used as an r-DSPE clean-up sorbent in onion, garlic and leek. The results first show that the mixed sorbent of graphene, PSA and GCB has a remarkable ability to clean-up interfering substances in the r-DSPE procedure when compared with the mixture of PSA and GCB. Use of matrix-matched standards provided acceptable results for tested pesticides with overall average recoveries between 70.1% and 109.7% and consistent RSDs <15.6%. In any case, this method still meets the 1–10 μg kg<sup>–1</sup> detection limit needed for pesticide testing and may be used for qualitative screening applications in which any identified pesticides can be quantified and confirmed by a more intensive method that achieves >70% recovery.</p></div
Correction to Photodegradation of Imidacloprid in Aqueous Solution by the Metal-Free Catalyst Graphitic Carbon Nitride using an Energy-Saving Lamp
Correction to Photodegradation of Imidacloprid in
Aqueous Solution by the Metal-Free Catalyst Graphitic Carbon Nitride
using an Energy-Saving Lam
Photodegradation of Imidacloprid in Aqueous Solution by the Metal-Free Catalyst Graphitic Carbon Nitride using an Energy-Saving Lamp
Imidacloprid has become a research
hotspot, due to its high toxicity to bees and other nontarget organisms.
Photodegradation is a common method for removing imidacloprid in an
aquatic environment. Traditional methods of pesticide photodegradation
have generally been confined by many factors, such as response to
only high-energy ultraviolet light. Herein, the visible-light-driven
photocatalyst graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) was applied to the photodegradation of imidacloprid. Visible-light
illumination (λ >400 nm) resulted in nearly 90% substrate
transformation in 5 h. With the illumination of an energy-saving lamp,
imidacloprid has also been mostly removed. 1-((6-chloropyridin-3-yl)Âmethylhydroxy)Âimidazolidin-2-ylidene
nitramide) and 4,5-dihydro-<i>N</i>-nitro-1-(3-pyridinylmethyl)-1<i>H</i>-imidazol-2-amine were the main photoproducts identified
by LC-MS analysis. The photocatalytic mechanism has also been discussed.
This work could provide new perspective that g-C<sub>3</sub>N<sub>4</sub>, as a good visible-light photocatalyst could be applied to
the cleanup of environmental pesticide pollution
<i>N</i>′-Nitro-2-hydrocarbylidenehydrazinecarboximidamides: Design, Synthesis, Crystal Structure, Insecticidal Activity, and Structure–Activity Relationships
A novel series of acyclic imine-substituted nitenpyram
analogues
were designed and synthesized from nitroaminoguanidine, and their
structures were confirmed using X-ray diffraction crystallography.
Preliminary bioassays showed that the target molecules exhibited good
activities against aphids in laboratory (<i>Myzus persicae</i> Sulzer) and field trials (<i>M. persicae</i> Sulzer and <i>Brevicoryne brassicae</i> Linnaeus). Comparative molecular field
analysis and comparative molecular similarity indices analysis were
employed to develop a three-dimensional quantitative structure–activity
relationship model that describes the insecticidal activity of 21
neonicotinoid derivatives. Simple synthesis, low cost, and good insecticidal
activity have made this series of compounds become very promising
candidates for future commercial pesticides
<i>N</i>′-Nitro-2-hydrocarbylidenehydrazinecarboximidamides: Design, Synthesis, Crystal Structure, Insecticidal Activity, and Structure–Activity Relationships
A novel series of acyclic imine-substituted nitenpyram
analogues
were designed and synthesized from nitroaminoguanidine, and their
structures were confirmed using X-ray diffraction crystallography.
Preliminary bioassays showed that the target molecules exhibited good
activities against aphids in laboratory (<i>Myzus persicae</i> Sulzer) and field trials (<i>M. persicae</i> Sulzer and <i>Brevicoryne brassicae</i> Linnaeus). Comparative molecular field
analysis and comparative molecular similarity indices analysis were
employed to develop a three-dimensional quantitative structure–activity
relationship model that describes the insecticidal activity of 21
neonicotinoid derivatives. Simple synthesis, low cost, and good insecticidal
activity have made this series of compounds become very promising
candidates for future commercial pesticides
Compounds emitted from intact fruits of four chestnut cultivars, Huaihuang, Huaijiu, Yanhong, and Shisheng<sup>*</sup>.
<p>Compounds emitted from intact fruits of four chestnut cultivars, Huaihuang, Huaijiu, Yanhong, and Shisheng<sup><a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0157609#t002fn001" target="_blank">*</a></sup>.</p
Compounds emitted from intact and <i>Conogethes punctiferalis</i> infested Huaijiu fruits<sup>*</sup>.
<p>Compounds emitted from intact and <i>Conogethes punctiferalis</i> infested Huaijiu fruits<sup><a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0157609#t003fn001" target="_blank">*</a></sup>.</p
Colonies of <i>Cyphellophora artocarpi</i> produced on jackfruit (original host) and on apple (pathogenicity test).
<p>A. On jackfruit. B. On apple.</p
Three New Species of <i>Cyphellophora</i> (Chaetothyriales) Associated with Sooty Blotch and Flyspeck
<div><p>The genus <i>Cyphellophora</i> includes human- and plant-related species from mammal skin and nails, plant materials, and food. On the basis of analysis of ITS, LSU, TUB2 and RPB1 data and morphological characters, three new species, <i>Cyphellophora phyllostachysdis</i>, <i>C</i>. <i>artocarpi</i> and <i>C</i>. <i>musae</i>, associated with sooty blotch and flyspeck disease, were added to this genus. The 2D structure of ITS1 and ITS2 confirmed this taxonomic status. Pathogenicity tests on apple fruit indicated that <i>C</i>. <i>artocarpi</i> could be a sooty blotch and flyspeck pathogen of apple.</p></div