A supramolecular polymeric photoinitiator with enhanced dispersion in photo-curing systems

2020 ◽  
Vol 11 (11) ◽  
pp. 1885-1893
Author(s):  
Tiantian Li ◽  
Zhilong Su ◽  
Hongjie Xu ◽  
Xiaodong Ma ◽  
Jie Yin ◽  
...  
Keyword(s):  
Water Soluble ◽  
Supramolecular Interactions ◽  
Potential Applications ◽  
Photo Curing ◽  
Polymeric Photoinitiator ◽  
Wide Potential ◽  
Curing Systems

A simple and general approach to make the commercial photoinitiator water-soluble and polymeric was developed via supramolecular interactions, which is believed to find wide potential applications in the photo-curing technology.

scholarly journals Cryo-EM structures of an insecticidal Bt toxin reveal its mechanism of action on the membrane

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Matthew J. Byrne ◽  
Matthew G. Iadanza ◽  
Marcos Arribas Perez ◽  
Daniel P. Maskell ◽  
Rachel M. George ◽  
...  
Keyword(s):  
Functional Data ◽  
Insect Pests ◽  
Economic Cost ◽  
Commercial Agriculture ◽  
Efficient Manner ◽  
Bt Toxin ◽  
Genes Encoding ◽  
Potential Applications ◽  
Chemical Pesticides ◽  
Wide Potential

AbstractInsect pests are a major cause of crop losses worldwide, with an estimated economic cost of $470 billion annually. Biotechnological tools have been introduced to control such insects without the need for chemical pesticides; for instance, the development of transgenic plants harbouring genes encoding insecticidal proteins. The Vip3 (vegetative insecticidal protein 3) family proteins from Bacillus thuringiensis convey toxicity to species within the Lepidoptera, and have wide potential applications in commercial agriculture. Vip3 proteins are proposed to exert their insecticidal activity through pore formation, though to date there is no mechanistic description of how this occurs on the membrane. Here we present cryo-EM structures of a Vip3 family toxin in both inactive and activated forms in conjunction with structural and functional data on toxin–membrane interactions. Together these data demonstrate that activated Vip3Bc1 complex is able to insert into membranes in a highly efficient manner, indicating that receptor binding is the likely driver of Vip3 specificity.

Facile fractionation of bamboo hydrolysate and characterization of isolated lignin and lignin-carbohydrate complexes

Holzforschung ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Xiaodi Wang ◽  
Yongchao Zhang ◽  
Luyao Wang ◽  
Xiaoju Wang ◽  
Qingxi Hou ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Organic Solvent ◽  
Extraction Process ◽  
Water Soluble ◽  
Organic Solvent Extraction ◽  
Glycoside Linkage ◽  
Potential Applications ◽  
Tremendous Amount ◽  
Main Components ◽  
Hemicellulosic Sugars

AbstractAn efficient separation technology for hydrolysates towards a full valorization of bamboo is still a tough challenge, especially regarding the lignin and lignin-carbohydrate complexes (LCCs). The present study aimed to develop a facile approach using organic solvent extraction for efficiently fractionating the main components of bamboo hydrolysates. The high-purity lignin with only a trace of carbohydrates was first obtained by precipitation of the bamboo hydrolysate. The water-soluble lignin (WSL) fraction was extracted in organic solvent through a three-stage organic solvent extraction process, and the hemicellulosic sugars with increased purity were also collected. Furthermore, a thorough characterization including various NMR techniques (31P, 13C, and 2D-HSQC), GPC, and GC-MS was conducted to the obtained lignin-rich-fractions. It was found that the WSL fraction contained abundant functional groups and tremendous amount of LCC structures. As compared to native LCC of bamboo, the WSL fraction exhibited more typical LCC linkages, i.e. phenyl glycoside linkage, which is the main type of chemical linkage between lignin and carbohydrate in both LCC samples. The results demonstrate that organic phase extraction is a highly efficient protocol for the fractionation of hydrolysate and the isolation of LCC-rich streams possessing great potential applications.

scholarly journals Laser-Induced Deposition of Plasmonic Ag and Pt Nanoparticles, and Periodic Arrays

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 10
Author(s):  
Daria V. Mamonova ◽  
Anna A. Vasileva ◽  
Yuri V. Petrov ◽  
Denis V. Danilov ◽  
Ilya E. Kolesnikov ◽  
...  
Keyword(s):  
Substrate Surface ◽  
Pt Nanoparticles ◽  
Single Step ◽  
X Ray Diffraction ◽  
Ag Nps ◽  
X Ray ◽  
Periodic Arrays ◽  
Potential Applications ◽  
Surface Decoration ◽  
Wide Potential

Surfaces functionalized with metal nanoparticles (NPs) are of great interest due to their wide potential applications in sensing, biomedicine, nanophotonics, etc. However, the precisely controllable decoration with plasmonic nanoparticles requires sophisticated techniques that are often multistep and complex. Here, we present a laser-induced deposition (LID) approach allowing for single-step surface decoration with NPs of controllable composition, morphology, and spatial distribution. The formation of Ag, Pt, and mixed Ag-Pt nanoparticles on a substrate surface was successfully demonstrated as a result of the LID process from commercially available precursors. The deposited nanoparticles were characterized with SEM, TEM, EDX, X-ray diffraction, and UV-VIS absorption spectroscopy, which confirmed the formation of crystalline nanoparticles of Pt (3–5 nm) and Ag (ca. 100 nm) with plasmonic properties. The advantageous features of the LID process allow us to demonstrate the spatially selective deposition of plasmonic NPs in a laser interference pattern, and thereby, the formation of periodic arrays of Ag NPs forming diffraction grating

Self-assembly mode and supramolecular framework of cyclopentanocucurbit[6]uril and aromatic amines

2021 ◽  
Vol 25 ◽  
Author(s):  
Jun Zheng ◽  
Yan Mei Jin ◽  
Xi Nan Yang ◽  
Lin Zhang ◽  
Dao Fa Jiang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Functional Materials ◽  
Supramolecular Interactions ◽  
X Ray Diffraction ◽  
Guest Molecules ◽  
Characterization Methods ◽  
Potential Applications ◽  
Non Covalent Interactions ◽  
Multi Level ◽  
Covalent Interactions

: Single-crystal X-ray diffraction analysis, nuclear magnetic resonance (NMR), and other characterization methods are used to characterize the complexes formed by cyclopentano-cucurbit[6]uril (abbreviated as CyP6Q[6]) as a host interacting with p-aminobenzenesulfonamide (G1), 4,4'-diaminobiphenyl (G2), and (E)-4,4'-diamino-1,2-diphenylethene (G3) as guests, respectively. The experimental results show that these three aromatic amine molecules have the same interaction mode with CyP6Q[6], interacting with its negatively electric potential portals. The supramolecular interactions include non-covalent interactions of hydrogen bonding and ion-dipole between host and guest molecules. CdCl2 acts as a structureinducing agent to form self-assemblies of multi-dimensional and multi-level supramolecular frameworks that may have potential applications in various functional materials.

Circularly polarized luminescence from oriented polymer films doped with a tetraphenylethylene-based conjugated oligomer

2021 ◽  
Author(s):  
Wan Zhang ◽  
Baining Ni ◽  
Hongkun Li ◽  
Yonggang Yang ◽  
Yongfang Li ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Polymer Films ◽  
High Quantum Yield ◽  
Oriented Polymer ◽  
Active Materials ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Potential Applications ◽  
Wide Potential

Circularly polarized luminescence (CPL) materials have attracted increasing interest due to their wide potential applications. However, achieving CPL-active materials with both large dissymmetry factor (glum) and high quantum yield (F)...

scholarly journals Evaluation of anthocyanin encapsulation efficiency into yeast cell by plasmolysis, ethanol, and ultrasound treatments using alone or in combination

Food Research ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 557-562
Author(s):  
M.D. Lieu ◽  
T.T.H. Hoang ◽  
H.N.T. Nguyen ◽  
T.K.T. Dang
Keyword(s):  
Yeast Cell ◽  
Encapsulation Efficiency ◽  
Color Stability ◽  
Water Soluble ◽  
Impact Factors ◽  
Time Treatment ◽  
Treated Sample ◽  
Potential Applications ◽  
The Individual ◽  
First Time

Anthocyanin is a water-soluble color compound of the flavonoid which was successfully encapsulation in Saccharomyces cerevisiae by plasmolysis, ethanol, and ultrasound treatments using alone or in combination in the first time. Treatment agents significantly enhanced the encapsulation efficiency of anthocyanin fluid. The encapsulation yield (EY) of the combined factors was higher than the individual impact factors. Ethanol 10% (v/v) and ultrasound 180 seconds for the highest EY 40.22±0.67%, then ethanol 10% (v/v) and NaCl 10% (w/v) for EY 36.45±0.35%, NaCl 10% and ultrasound for EY 32.14±0.98% lowest. The color stability evaluation of the capsules was carried out at 80°C for 30 minutes. The color lost rate was determined by the spectrometer. The color loss of samples with the un-treatment yeast was 20.45±1.21%, higher than the treated sample. This suggests that anthocyanin encapsulation by yeast cell is efficient in overcoming the effects of high temperatures and having potential applications in food processing.

Biosynthesis of Polyglutamic Acid and its Application on Agriculture

2011 ◽  
Vol 183-185 ◽  
pp. 1219-1223 ◽  
Author(s):  
Xiang Yu ◽  
Min Wang ◽  
Qun Hui Wang ◽  
Xu Ming Wang
Keyword(s):  
Water Treatment ◽  
Glutamic Acid ◽  
Biodegradable Polymer ◽  
Water Soluble ◽  
Future Trends ◽  
Polyglutamic Acid ◽  
Separation And Purification ◽  
Potential Applications ◽  
Purification Methods ◽  
Fermentation Parameters

Poly γ-glutamic acid (γ-PGA) is a kind of water soluble and biodegradable polymer, which is nontoxic toward humans and the environment. Therefore, the potential applications of γ-PGA and its derivatives have been of interest in a broad range such as food, cosmetics, medicine, water treatment and agriculture. This paper summarizes γ-PGA synthesis pathways in microorganisms, producing strains, fermentation parameters, as well as separation and purification methods. In addition, the prospect of γ-PGA application on agriculture was introduced, pointing out the problems and the future trends in research and application of γ-PGA.

scholarly journals Controlled allylation of polyelectrolytes: a deep insight into chemical aspects and their applicability as building blocks for robust multilayer coatings

2019 ◽  
Vol 91 (6) ◽  
pp. 983-995
Author(s):  
Thi-Thanh-Tam Nguyen ◽  
Sabrina Belbekhouche ◽  
Rémi Auvergne ◽  
Benjamin Carbonnier ◽  
Daniel Grande
Keyword(s):  
Heterogeneous Reaction ◽  
Experimental Tests ◽  
Building Blocks ◽  
Water Soluble ◽  
Basic Solution ◽  
Solution Ph ◽  
Covalent Crosslinking ◽  
Electrolytic Properties ◽  
Potential Applications ◽  
Post Modification

Abstract Polyelectrolytes (PEs) bearing easily derivatizable functions for possible post-modification under mild conditions can find a broad range of applications in various fields. The present paper describes the successful controlled side-chain allylation of two types of PEs: polyamine-based polycations, i.e. poly(allylamine hydrochloride) (PAH) and branched polyethyleneimine (PEI), and strong polyanions, i.e. poly(sodium vinyl sulfonate) (PVS) and poly(sodium 4-styrene sulfonate) (PSS). PSS has been largely investigated in the literature, while PVS is much less commonly explored. The allylation of each type presents its own drawback, i.e. heterogeneous reaction in the case of strong polyanions and instability of partially protonated allylated polyamine products. Nevertheless, all encountered difficulties could be solved and thoroughly elucidated by different experimental tests. This partial allyl-functionalization does not affect the electrolytic properties of the newly allylated PEs, as evidenced by the effective construction of two series of polyelectrolyte multilayer (PEM) films, namely PEI-ene (PSS-ene/PAH-ene)4 and PEI-ene (PVS-ene/PAH-ene)4, the latter being one of the rare examples developed in the literature. The presence of allyl groups on the PE side-chains allows for the stabilization of the resulting PEM films via thiol-ene photo-crosslinking in the presence of a water-soluble dithiol crosslinker. In order to fix permanently the resulting crosslinked PEM films on substrates, the covalent crosslinking occurs not only between different C=C bonds on PE layers but also with those present on substrates preliminarily functionalized with allyl groups via sulfur–gold chemistry. The robustness of both resulting crosslinked PEM films under strongly basic solution (pH 14) is validated by Quartz Crystal Microbalance (QCM) measurements. The versatility and effectiveness of the present approach is expected to find potential applications in different scientific and technological fields.

Adsorption of water-soluble organic dyes on ferrofluid-modified sawdust

Holzforschung ◽  
2007 ◽  
Vol 61 (3) ◽  
pp. 247-253 ◽  
Author(s):  
Ivo Safarik ◽  
Petra Lunackova ◽  
Ewa Mosiniewicz-Szablewska ◽  
Frantisek Weyda ◽  
Mirka Safarikova
Keyword(s):  
Magnetic Nanoparticles ◽  
Ph Value ◽  
Organic Dyes ◽  
Nile Blue ◽  
Dye Adsorption ◽  
Water Soluble ◽  
Methyl Green ◽  
Brown Crystal ◽  
Potential Applications ◽  
Safranin O

Abstract A magnetically responsive composite material based on lignocellulose and magnetic nanoparticles has been prepared. Spruce sawdust was magnetically modified by contact with water-based magnetic fluid stabilised with perchloric acid. Electron spin resonance and transmission electron microscopy measurements indicated the presence of both individual magnetic nanoparticles and clusters precipitated on the surface of sawdust particles. The material prepared was used to study the adsorption of selected water-soluble organic dyes. The adsorption isotherms followed Langmuir, generalised Freundlich, generalised Langmuir, and Langmuir-Freundlich adsorption patterns. Maximum adsorption capacities for acridine orange, Bismarck brown, crystal violet, malachite green, methyl green, Nile blue, safranin O and Saturn blue LBRR 200 ranged between 34 and 59 mg g-1 dry adsorbent. A change in pH value can increase the dye adsorption. Ferrofluid-modified sawdust is thus an interesting material for further study and potential applications.

scholarly journals Electrospun polyvinyl alcohol-honey nanofibers

2013 ◽  
Vol 17 (5) ◽  
pp. 1549-1550 ◽  
Author(s):  
Ping Wang ◽  
Ji-Huan He
Keyword(s):  
Polyvinyl Alcohol ◽  
Environmentally Friendly ◽  
Potential Applications ◽  
Wide Potential

This paper sugeests a method for fabrication of polyvinyl alcohol-honey nanofibers by electrospinning. Polyvinyl alcohol and honey are all biocompatible and environmentally friendly materials. This combination will lead to wide potential applications in various engineering fields.

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