ORCID Profile
0000-0002-7531-0770
Current Organisation
Australian National University
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Publisher: Northeastern University Library
Date: 2017
DOI: 10.17760/D20264941
Publisher: Springer Science and Business Media LLC
Date: 04-08-2021
DOI: 10.1038/S41598-021-95323-W
Abstract: Flowers can be transmission platforms for parasites that impact bee health, yet bees share floral resources with other pollinator taxa, such as flies, that may be hosts or non-host vectors (i.e., mechanical vectors) of parasites. Here, we assessed whether the fecal-orally transmitted gut parasite of bees, Crithidia bombi , can infect Eristalis tenax flower flies. We also investigated the potential for two confirmed solitary bee hosts of C. bombi , Osmia lignaria and Megachile rotundata , as well as two flower fly species, Eristalis arbustorum and E. tenax, to transmit the parasite at flowers. We found that C. bombi did not replicate (i.e., cause an active infection) in E. tenax flies. However, 93% of inoculated flies defecated live C. bombi in their first fecal event, and all contaminated fecal events contained C. bombi at concentrations sufficient to infect bumble bees. Flies and bees defecated inside the corolla (flower) more frequently than other plant locations, and flies defecated at volumes comparable to or greater than bees. Our results demonstrate that Eristalis flower flies are not hosts of C. bombi , but they may be mechanical vectors of this parasite at flowers. Thus, flower flies may lify or dilute C. bombi in bee communities, though current theoretical work suggests that unless present in large populations, the effects of mechanical vectors will be smaller than hosts.
Publisher: Wiley
Date: 29-08-2023
Abstract: Dynamic covalent bonds (DCBs) have attracted huge interest in the past two decades, particularly in polymer materials, due to their reversibility. The introduction of DCBs into polymers often endows the polymers with unprecedented properties such as self‐healing, shape memory, enhanced mechanical strength, and stimuli responsiveness. Specifically, DCBs offer unique opportunities for self‐healing materials by enabling the spontaneous reformation of covalent linkages and restoring structural integrity upon damaged or mechanical stress. Additionally, shape memory behavior allows polymers to retain programmed shapes and undergo reversible transformations triggered by external stimuli. This property finds applications in various fields such as biomedical devices and smart textiles. Furthermore, DCBs enhance mechanical strength, making polymers resilient and durable, thus expanding their applications in structural materials. Their stimuli responsiveness allows for dynamic modulation of properties based on environmental triggers, enabling the development of intelligent materials for sensors, drug delivery systems, and responsive coatings. This review provides an overview of commonly employed DCBs in polymer materials, explaining their dynamic behaviors, reversibility, and stabilities. It also explores the erse applications of DCB‐based polymers, from self‐healing coatings to shape memory polymers. Through these advancements, the potential for future breakthroughs in materials science becomes evident.
Publisher: Wiley
Date: 06-05-2021
Abstract: Natural flavone‐derivatives (i.e., morin and quercetin) are investigated as visible light‐sensitive photoinitiators. The photochemical mechanisms of the radical generation from flavone‐derivative‐based photoinitiating systems (PISs) upon exposure to mild blue light‐emitting diodes are studied. The impact of substituent site of functional groups on the photoinitiation ability is determined. The quercetin‐based PISs exhibit more reactivity than the morin‐based systems on free radical photopolymerization. Moreover, the investigated flavone‐based PISs present their stabilities at room temperature, indicating that resin containing these systems barely require special storage requirements. Thiol‐ene polymerization initiated by the flavone‐derivatives‐based PISs is also investigated.
Publisher: Wiley
Date: 18-06-2019
Abstract: The design and development of photoinitiating systems applicable to UV or even visible light delivered from light-emitting diodes (LEDs) has been attracting increasing attention due to their great potential applications in various fields. Compared to the strategy of synthesizing novel compounds, the exploration of existing chemicals with interesting photochemical hotophysical properties for their usage as photoinitiators is more appealing and easily commercialized. Nevertheless, a number of compounds such as monoamino-substituted anthraquinone derivatives, which are intensively investigated for their photophysical and photochemical properties, have seldom been studied for their roles as photoinitiators under LED irradiation. Herein, three monoamino-substituted anthraquinone derivatives, that is, 1-aminoanthraquinone, 1-(methylamino)anthraquinone and 1-(benzamido)anthraquinone, are studied for their potential as photoinitiators. The photoinitiation mechanism of these monoamino-substituted anthraquinone derivatives, when combined with iodonium salt, is first clarified using computational quantum chemistry, fluorescence, steady-state photolysis, and electron spin resonance spin-trapping techniques. Then, their photoinitiation ability for the cationic photopolymerization of epoxide and inyl ether monomers is also investigated.
Publisher: Elsevier BV
Date: 09-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3PY00651D
Abstract: This review mainly summarizes the current progress in photopolymerization for bio-based photoinitiators hotoinitiating systems, along with presents conditions for monomers derived from natural products.
Publisher: Elsevier BV
Date: 05-2022
Publisher: American Chemical Society (ACS)
Date: 04-2019
Publisher: Elsevier BV
Date: 10-2022
Publisher: American Chemical Society (ACS)
Date: 11-06-2021
Publisher: Wiley
Date: 25-07-2023
DOI: 10.1002/POL.20230327
Abstract: Nowadays, photopolymerization has spanned across all academic and industrial applications due to its appealing features such as energy saving, environmentally‐friendly polymerization conditions, high monomer conversions, rapid polymerization kinetics and so on. Photoinitiator (PI), as a crucial component of the photoinitiating system (PIS) are capable of interacting with light efficiently, enabling to generate initiating species in mono or multicomponent systems. In this work, 13 phenothiazine‐based oxime esters (OXEs) (never reported before) were synthesized and their photoinitiation abilities for the free radical photopolymerization (FRP) of acrylates were examined upon irradiation with LED@405 nm. Parallel to their photochemical reactivities, their abilities to initiate thermal polymerization processes were also investigated. Finally, these OXEs exhibited excellent photo/thermal initiation performances, demonstrating their dual initiation properties. Phenothiazine‐based oxime esters can be used as PIs in 3D printing as well as thermal initiator in the manufacturing of carbon fiber composites.
Publisher: Elsevier BV
Date: 11-2022
Publisher: Elsevier BV
Date: 2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1PY00030F
Abstract: N -(1-Pyrenyl)glycine can act as a versatile initiator for various polymerizations.
Publisher: Wiley
Date: 27-08-2019
Publisher: MDPI AG
Date: 24-10-2022
Abstract: Photopolymerization has attracted great interest because of its mild reaction conditions, spatiotemporal controllability, cost efficiency, and fast speed. However, with the raising environmental awareness and the increasing attention to life and health, the leachability of photoinitiators has become a growing concern. In this research, a methacrylate functionalized triazine-based polymerizable visible light photoinitiator, 2-(((4-(2-(4,6-bis(trichloromethyl)-1,3,5-triazin-2-yl)vinyl)phenoxy)carbonyl)amino)ethyl methacrylate (CT) and its reversible addition–fragmentation chain transfer (RAFT) polymerized CT (pCT) were designed as the polymerizable and polymeric photoinitiators, respectively. The photoinitiation abilities of the investigated triazine derivatives were evaluated under violet LEDs. Due to the steric effect, pCT showed slightly reduced photoinitiation ability under both LED at 400 nm and 410 nm irradiation. Nevertheless, photopolymers initiated using CT and pCT showed excellent migration stability compared to those prepared by 2-(4-methoxystyryl)-4,6-bis(trichloromethyl)-1,3,5-triazine (MT) and 4-(2-(4,6-bis(trichloromethyl)-1,3,5-triazin-2-yl)vinyl)phenol (PT). Specifically, CT and pCT-based polymers prepared under the irradiation of LED at 400 nm exhibited only 1/3-fold and 1/14-fold of photoinitiators leachability, while 1/2-fold and 1/6-fold of photoinitiator leachability were obtained compared to the MT-based photocured polymers when using LED at 410 nm. The excellent migration stability of pCT reveals potential applications in the biomedical and food packaging fields.
Publisher: Wiley
Date: 08-05-2020
Publisher: Wiley
Date: 29-08-2023
Abstract: With the rapid development of new irradiation setups as well as the ongoing interest in 3D printing, photopolymerization has been extensively studied during the last decades. In photopolymerization, a photoinitiator and/or photosensitizer plays a crucial role in the photoinitiation step as this component absorbs light, thus creating the initiating species. From this viewpoint, different groups that can be introduced onto photoinitiators are primordial to generate initiating species, and the development of monocomponent photoinitiating systems is the focus of currently numerous works. In this study, a series of 17 chalcone‐based oxime esters (OXEs) featuring the pyrene chromophore are designed, synthesized and studied for their photoinitiation properties upon irradiation with visible light. Precisely, their photoinitiation abilities are examined during the free radical photopolymerization of acrylates under the irradiation of LED at 405 nm. In the series of oxime esters, five of them demonstrate excellent photoinitiation abilities. Their thermal initiation abilities are also examined. To improve their photoinitiation abilities, these Type I photoinitiators are also tested as Type II photoinitiators in two‐component photoinitiating systems using bis ‐(4‐ tert ‐butylphenyl)iodonium or ethyl 4‐(dimethylamino)benzoate as additives. In this process, the OXE‐B/iodonium system shows the best photopolymerization. To develop the use of these chalcone‐based oxime esters, the best OXE is used as a monocomponent photoinitiating system in 2D laser writing at 405 nm. The design of composites using glass fibers or carbon fiber as fillers is also examined. This article is protected by copyright. All rights reserved
Publisher: De Gruyter
Date: 06-04-2021
Publisher: American Chemical Society (ACS)
Date: 06-12-2018
Publisher: Elsevier BV
Date: 03-2020
No related grants have been discovered for Di (Kaylee) Zhu.