In 2022, southern China experienced an unprecedented summer-autumn extreme heatwave and drought, resulting in significant impacts on agricultural forestry production. Camellia oleifera, a woody edible-oil-bearing species endemic to one of the world’s four major oil crops, is primarily cultivated subtropical low mountain hilly regions, with extensive distribution across 15 production provinces China. The period from July October represents critical stage for fruit enlargement...

Previously, an inverted phase (the minority blocks comprising the continuum phase) was found in solution-cast block copolymer thin films. In this study, effect of casting solvents on formation has been studied. Two copolymers, poly(styrene-b-butadiene) (SB) (Mw = 73 930 Da) and poly(styrene-b-butadiene-b-styrene) (SBS) 140 000 Da), with comparable lengths equal polystyrene (PS) weight fraction (∼30 wt %) were used. The films cast from different solvents, toluene, benzene, cyclohexane, binary...

ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTLateral Nanopatterns in Thin Diblock Copolymer Films Induced by Selective SolventsYongzhong Chen, Haiying Huang, Zhijun Hu, and Tianbai HeView Author Information State Key Laboratory of Polymer Physics Chemistry, Changchun Institute Applied Chinese Academy Sciences, Changchun, 130022, People's Republic China Cite this: Langmuir 2004, 20, 9, 3805–3808Publication Date (Web):March 2004Publication History Received5 November 2003Revised19 February...

Blue luminescent nitrogen-doped carbon nanodots (N-CDs) with pH-dependent properties were prepared from citric acid (CA), glutathione (GSH), and polyethylene polyamine (PEPA) using a two-step pyrolytic route.

The morphologies and structures for the thin film of blend systems consisting two asymmetric polystyrene-block-polybutadiene (SB) diblock copolymers induced by annealing in vapor different solvents, namely, cyclohexane, benzene, heptane, which have selectivity or preferential affinity a certain block, were investigated tapping mode atomic force microscopy (AFM) transmission electron (TEM). results revealed that even slight good solvent one block would strongly alter morphology film. An...

Antioxidative CDs with excellent fluorescence properties and specific responsiveness to ˙OH were prepared applied effectively detect ampicillin through approach.

Cone-jet electrospray is widely used in various fields, such as electrospinning, nanostructured porous coating preparation, and inkjet printing, for which it can produce a large number of monodisperse high charge-to-mass ratio droplets. A molecular dynamics method employed to investigate the cone-jet emission behavior nanofluids, where microscopic mechanism including formation cone, disintegration jet, stability hydrogen bond, interactions between molecules revealed. In this paper, influence...

Kerogen is mainly composed of carbon, hydrogen, and oxygen, which are the main components crude oil gas. The pyrolysis kerogen an efficient method to generate clean energy. In present work, reaction process three types simulated using ReaxFF molecular dynamics (MD) methods study microscopic mechanism distribution products. results indicated that products significantly depend on structures, temperature, time. As temperature increases, gaseous hydrocarbon light heavy fractions decreased, where...

Adequate delivery of antibiotics to infected sites is crucial for the effective treatment bacterial infections. A controlled and sustained release system based on porous pH-responsive poly(lactic-co-glycolic acid) (PLGA)-vancomycin (Van) microspheres was developed. In this system, drug triggered by weakly acidic environment, like local inflamed tissues. The microspheres, developed through W1/O/W2 double-emulsion evaporation method, comprised a PLGA-based shell core containing Van...

We report observation of ring-shaped morphology formed in thin films a cylinder-forming polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymer cast from 1,1,2,2-tetrachloroethane (Tetra-CE) solution via relatively fast solvent evaporation rates, which Tetra-CE is good for both blocks but preferential affinity the minority PMMA block. studied microstructure set solution-cast block dried with different R. The control R leads to keeping microstructures concentrations (φ) and...

We have investigated the inverted phase formation and transition from to normal for a cylinder-forming polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymer in solution-cast films with thickness about 300 nm during process of solution concentrating by slow solvent evaporation. The cast is 1,1,2,2-tetrachloroethane (Tetra-CE), good both blocks but having preferential affinity minority PMMA block. During such process, behavior was examined freeze-drying samples at different...

Abstract Background Heart failure (HF) is associated with high mortality and rehospitalization rates, highlighting the need for novel therapeutic approaches. Jianxin (JX) granules, a Traditional Chinese Medicine formulation, have been patented treatment of HF. However, specific effects underlying mechanisms JX granules not fully elucidated. This study aimed at investigating mechanism in HF based on proteomics metabolomic profiling. Methods model was established rats by ligation left coronary...

In this Letter, crystal growth of a symmetric crystalline−amorphous diblock copolymer, poly(styrene-b-ε-caprolactone) (PS-b-PCL), in thin films was investigated by atomic force microscopy (AFM). Relief structures holes and islands were formed during annealing the film at molten state, situ observation subsequent room temperature indicated that crystals preferred to occur edge or grew into interior area. It concluded stretched PCL blocks relief structures, caused material transportation...

We report the morphology and phase behaviors of blend thin films containing two polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymers with different blending compositions induced by a selective solvent for PMMA block, which were studied transmission electron microscopy (TEM). The neat asymmetric PS-b-PMMA employed in this study, respectively coded as a1 a2, have similar molecular weights but volume fractions PS block (fPS = 0.273 0.722). Another symmetric copolymer, s, has...

The surface morphology and crystallization behavior of a weakly segregated symmetric diblock copolymer, poly(styrene-b-ε-caprolactone) (PS-b-PCL), in thin films were investigated by optical microscopy, X-ray photoelectron spectroscopy, atomic force microscopy (AFM). When the samples annealed molten state, surface-induced ordering, that is, relief structures with uniform thickness or droplets adsorbed monolayer, observed depending on annealing temperature. polar PCL block preferred to wet...

Aiming at the problem that phase jumping point of binocular structured light interferes with matching, an improved monotonic zero-setting method is proposed for correction. On basis traditional method, ratio judgment absolute value difference between front and rear points overall fitting slope added, which effectively improves matching rate. In order to further improve accuracy 3D reconstruction light, influence relative distance intersection camera sight object be measured on same...