Insect Science
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2024
·
IF 2.9
Huiting Zhao,Longlong Chen,Miaomiao Liu,Shuguo Zhao,Weihua Ma,Yusuo Jiang
Insulin receptors (InR) are an integral component of the insulin/insulin-like growth factor signaling pathway, which plays a vital role in insect development, lifespan, reproduction, and olfactory sensitivity. However, whether InR participate in the peripheral olfactory system of insects remains unclear. Recently, we found that 2-heptanone (2-HT) affects AcerInR expression, the gene for an InR protein, in Apis cerana cerana . We then examined the spatiotemporal expression profile of the gene in A. cerana cerana . The mRNA of AcerInR was primarily expressed in the antennae, wings, and legs of forager bees, which are probable chemosensory tissues. The results of fluorescence competitive binding assays, combined with site-directed mutagenesis, demonstrated that AcerOBP6 and AcerOBP14 exhibit strong binding affinities to 2-HT. Furthermore, after foragers were fed with double-stranded AcerInR , the expression levels of AcerOBP6 and AcerOBP14 decreased significantly, as did the electroantennogram responsiveness to 2-HT and some other odorants. In conclusion, our findings provide a foundation for understanding the involvement of AcerInR in the odor perception of A. cerana cerana . Moreover, they offer novel insights into the olfactory recognition mechanism in insects.
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Journal of Energy Storage
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2024
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IF 8.9
Yi Wang,Xiaofeng Yuan,Jianjun Wang,Jianrong Wang,Ting Zhang,Yi Zheng,Yangtao Xu
The introduction of porous matrix in shape stable phase change materials (PCMs) alters the phase transition behavior of confined molecules. The mechanism by which the matrix affects the thermophysical properties of composite PCMs is still unclear, even there are conflicting understandings of the same phenomenon. According to this, paraffin/Kevlar nanofibrous films (PF/KNF) with different PF contents were fabricated by one step self-assembly method to comprehensively evaluate the regulation of confinement effects on the thermophysical properties and crystallization kinetics of confined PCMs. Due to the strong self-assembly tendency of Kevlar nanofibers in proton environment, paraffin passively wrapped in the network of matrix, forming a sandwich layered structure. The confinement of matrix altered the crystal structure of paraffin, even leading to the amorphous states in films with lower paraffin content. It also leaded to the formation of a non-melting layer at host-guest interface, thereby reducing the latent heat of composite PCMs. The latent heat of PF/KNF-70, the film with the highest paraffin content without leakage, decreased by about 32.7 % compared to the theoretical enthalpy calculated based on the mass percentage of paraffin in composite. In addition, the percentage of non-phase transition layer decreased linearly with the increase of PF content. The results of crystalline dynamics indicate that the matrix plays a dual role in providing nucleation sites and inhibiting molecular motion. When crystallization occurs at higher temperature (48.8 °C in this study), providing nucleation sites and promoting crystallization dominated the process, while inhibiting molecular motion and reducing crystallization rate become more prominent when crystallization temperature decreases.
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Qichen Shang,Daiwei Gu,Lin Sheng,Yu Chang,Jian Deng,Guangsheng Luo
Laminar jet flow is an underlying phenomenon used to generate droplets efficiently. However, its hydrodynamics at the microscale remains unknown. This work focuses on the scale effect. We innovatively propose the difference between the jet at the microscale and that at the regular scale is not in the wave development but in the regime of flow pattern, and it’s much more stable at the microscale. The characteristic effect at the microscale due to the intensified gas/liquid/solid–liquid interaction is first reported. The variations of characteristic sizes and hydrodynamics with the kinetic energy, physical property, and structural size at the microscale are analyzed by introducing two key parameters − wave velocity and wave numbers, which are first proposed. The result shows that the kinetic energy determines the hydrodynamics. Viscosity and interfacial tension significantly affect the microscale laminar jet. Using wave numbers, Tyler’s equation is modified, guiding the design of effective microdroplet-generation devices.
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Nanomaterials
·
2024
·Vol. 14
·期 15
·1280
·
IF 4.4
Liyuan Cai,Jingchun Wu,Miaoxin Zhang,Keliang Wang,Bo Li,Xin Yu,Yangyang Hou,Yang Zhao
Carbon Capture, Utilization, and Storage (CCUS) stands as one of the effective means to reduce carbon emissions and serves as a crucial technical pillar for achieving experimental carbon neutrality. CO2-enhanced oil recovery (CO2-EOR) represents the foremost method for CO2utilization. CO2-EOR represents a favorable technical means of efficiently developing extra-low-permeability reservoirs. Nevertheless, the process known as the direct injection of CO2is highly susceptible to gas scrambling, which reduces the exposure time and contact area between CO2and the extra-low-permeability oil matrix, making it challenging to utilize CO2molecular diffusion effectively. In this paper, a comprehensive study involving the application of a CO2nanobubble system in extra-low-permeability reservoirs is presented. A modified nano-SiO2particle with pro-CO2properties was designed using the Pickering emulsion template method and employed as a CO2nanobubble stabilizer. The suitability of the CO2nanobubbles for use in extra-low-permeability reservoirs was evaluated in terms of their temperature resistance, oil resistance, dimensional stability, interfacial properties, and wetting-reversal properties. The enhanced oil recovery (EOR) effect of the CO2nanobubble system was evaluated through core experiments. The results indicate that the CO2nanobubble system can suppress the phenomena of channeling and gravity overlap in the formation. Additionally, the system can alter the wettability, thereby improving interfacial activity. Furthermore, the system can reduce the interfacial tension, thus expanding the wave efficiency of the repellent phase fluids. The system can also improve the ability of CO2to displace the crude oil or water in the pore space. The CO2nanobubble system can take advantage of its size and high mass transfer efficiency, among other advantages. Injection of the gas into the extra-low-permeability reservoir can be used to block high-gas-capacity channels. The injected gas is forced to enter the low-permeability layer or matrix, with the results of core simulation experiments indicating a recovery rate of 66.28%. Nanobubble technology, the subject of this paper, has significant practical implications for enhancing the efficiency of CO2-EOR and geologic sequestration, as well as providing an environmentally friendly method as part of larger CCUS-EOR.
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Ying-Ming Li,Yi-Ran Li,Hang-Ping Fang,Yao Deng,De-Yi Wang
A novel multidimensional electromagnetic wave-absorbing material was developed by combining carboxylated carbon nanotubes (CNT) with graphene oxide (GO) through multidimensional design, and cobalt/nickel-based metal organic frameworks (Co/Ni-MOF) were subsequently loaded onto the GO surface via its rich functional groups to form the composite absorbing material CNT-rGO-Co/Ni-MOF. Incorporating 25 wt % of CNT-rGO-Co/Ni-MOF into the paraffin matrix led to a remarkable RLmin value of −43 dB at 16.4 GHz, with an effective absorbing bandwidth (EAB) exceeding 4 GHz, all within a thickness of just 1.5 mm, showcasing its “lightweight, broadband, and high efficiency” characteristics. The exceptional electromagnetic wave absorption performance was attributed to multi-interface polarization loss, resistance loss, and magnetic medium loss. Furthermore, when incorporating 10 wt % of CNT-rGO-Co/Ni-MOF, the heat release capacity and peak heat release rate of EP/CNT-rGO-Co/Ni-MOF10 decreased by 59.2 and 52.6%, respectively.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ruiqi Xu,Hongfei OuYang,Zeqin Huang,Gang Huang,Jin Wang,Guizhen Zhang
As one of the key components of supercapacitors (SCs), separators can directly affect the energy density, output power, and safety stability of SCs. However, it is still a challenge to prepare separators that simultaneously combine large pore size, ultrathin thickness, and excellent mechanical properties. Herein, a 5 μm ultrathin separator with a three-dimensional (3D) porous nanofiber skeleton dotted by fumed Al2O3 nanoparticles has been developed using biaxial stretching. The unique structure of the 3D porous nanofiber skeleton ensures a mechanical strength up to 40 MPa, while the fumed Al2O3 nanoparticles dotted on the 3D skeleton and the incorporation of the annealing process achieve a large average pore size of 130.8 nm, thus harmoniously resolving the contradiction between strength and large average pore size for ultrathin composite separators. The ultrathin thickness greatly shortens the ion transmission channel and effectively reduces ion transmission resistance. Moreover, the fumed Al2O3 nanoparticles exposed on the surface of the 3D porous nanofiber skeleton enhance the wettability of the electrolyte as well as the thermal stability of the separator, achieving a low bulk resistance of 0.3 Ω and zero shrinkage at 130 °C. Due to the unique structure, UAPFS7 offers a better overall performance compared to commercial separators. These findings indicate that the developed separators exhibit excellent comprehensive performance and have the potential to promote the large-scale application of next-generation energy storage devices.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Lei Zhang,Chaoming Wang,Peng Zhu,Shuaiao Xie
Carbon-based foam or aerogels show prominent potential as electromagnetic wave (EMW) absorption materials owing to their light weight, low density, abundant pore structure, and good electrical conductivity. In this work, a series of nitrogen-doped carbon aerogels with abundant micropore and nanosized pores, prepared based on carboxymethyl cellulose sodium (CMC) hydrogels and via freeze-drying and pyrolysis, exhibit good EMW absorption performances. Through simply adjusting the additive amount of dicyandiamide (DCD), nitrogen-doped CMC derived carbon aerogels (NCCAs) with various morphologies, pore structures, and chemical compositions are obtained. The synthesized NCCA10 and NCCA20 achieve a minimum reflection loss (RLmin) of −56.05 dB (2.8 mm) and −39.4 dB (1.7 mm) and effective absorption bandwidth (EAB) of 2.88 GHz at 2.7 mm and 4.88 GHz at 1.6 mm, respectively. The EMW absorption mechanism implies that the enhanced performance of NCCAs can be ascribed to the synergistic effect of dielectric loss, multiple reflection loss, conductive loss, and impedance adjustment. This study provides a good way to explore EMW adsorption materials with a broad bandwidth and good absorption behavior via nitrogen element doping.
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CELLS TISSUES ORGANS
·
2018
·Vol. 205
·期 1
·20-31
·
IF 1.275
Li Yu,Zhang Zhanzhao,Zhang Zhiyong
The combination of bone tissue scaffolds with osteogenic induction factors is an effective strategy to facilitate bone healing processes. Here, chitosan (CS)/nano-hydroxyapatite (HA) scaffolds containing simvastatin (SIM)-loaded PLGA microspheres were fabricated by combining a freeze-drying technique with a modified water-oil-water emulsion method. The CS/HA weight ratio of 1:2 was selected by analyzing the effect of HA content on the micro-architecture, mechanical strength, and biocompatibility of the scaffold. Drug release kinetics showed that the SIM encapsulated in the scaffold was released in a sustained manner for up to 30 days. In vitro bioactivity study in rat bone marrow-derived mesenchymal stem cells showed that the SIM-loaded scaffolds had a strong ability in accelerating cell proliferation and inducing osteogenic differentiation. Moreover, an in vivo experiment using a rat calvarial defect model also documented that the SIM-loaded scaffolds had a remarkable effect on bone-promoting regeneration. The results of this study suggest that the SIM-loaded CS/HA scaffold is feasible and effective in bone repair and thus may provide a promising route for the treatment of critical-sized bone defects
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APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Kai Yang,Lei Zhong,Ruiteng Guan,Min Xiao,Dongmei Han,Shuanjin Wang,Yuezhong Meng
Lithium-sulfur (Li-S) batteries have remarkably high theoretical specific capacity as promising candidates for next-generation energy storage. However, the “polysulfides shuttle” effect hampers its commercial application. Here, we use a kind of rice paper as a raw material to get inorganic oxides doping carbon felt by the facile carbonization method, and then modified by a simple coating process using poly (fluorenyl ether ketone) and Super P slurry. The special structure of the carbon felt derived from rice paper and its modified layer endow the final electronic conductive interlayer with inherent polysulfides absorbents and ion Coulombic repulsion functions, respectively, which show synergistic effect for trapping polysulfides. As an interlayer of Li-S batteries, the obtained carbon felt/poly (fluorenyl ether ketone)& Super P (CFSS) interlayer shows excellent electrochemical performance in improving specific capacity and decreasing polarization. The batteries with CFSS interlayer exhibit a high capacity of 837 mA h g −1 at 2.0 C and a high initial capacity of 1073.4 mA h g −1 and good capacity retention of 824.5 mA h g −1 after 500 cycles at 0.5 C. CFSS interlayer also shows excellent anti-self-discharge performance. Therefore, the simple and economical CFSS interlayer can be considered as a promising component for high performance Li-S batteries.
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ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Qingsong Lian,Yan Li,Asim A. S. Sayyed,Jue Cheng,Junying Zhang
Designing novel phase change materials (PCMs) is of vital importance in achieving the sustainable development of energy. Here, we facilely prepare a series of novel multiple solid–solid PCMs (SSPCMs, EPPa-X systems) by blending paraffin, epoxy resin with crystalline side chains (D18), and poly(propylene oxide)diamine together followed by a one-pot curing process. Strong intermolecular forces between paraffin and D18 (based on their good compatibility) and a reliable three-dimensional (3-D) cross-linking network of epoxy resin form a unique encapsulation mechanism, which provides the EPPa-X SSPCMs with excellent shape-stable properties and superior thermal stability (remain stable below 180 °C) without sacrificing too much latent heat of paraffin (only 1.6% latent heat loss). Due to the combination of two melting processes at 36 and 60 °C derived from D18 and paraffin, respectively, the latent heat of the EPPa-50 system is high, up to 152.6 J/g. Besides, the supercooling extent of D18 decreased from 13.6 to 10.5 °C with the addition of paraffin due to the heterogeneous nucleation effect. The novel EPPa-X SSPCMs possess tremendous potential for a wide range of applications due to their facile preparation, low cost, high reliability, and excellent phase change properties, while the unique encapsulation mechanism may open a new door for preparing other novel types of PCMs.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-19
·
IF 14.7
Yang Mei,Chen Tingting,Chen Xin,Pan Hongxian,Zhao Guoli,Chen Zhongxing,Zhao Nan,Ye Qianfang,Chen Ming,Zhang Shenrong,Gao Rongrong,Meek Keith M.,Hayes Sally,Ma Xiaowei,Li Xin,Wu Yue,Zhang Yiming,Kong Na,Tao Wei,Zhou Xingtao,Huang Jinhai
Keratoconus, a disorder characterized by corneal thinning and weakening, results in vision loss. Corneal crosslinking (CXL) can halt the progression of keratoconus. The development of accelerated corneal crosslinking (A-CXL) protocols to shorten the treatment time has been hampered by the rapid depletion of stromal oxygen when higher UVA intensities are used, resulting in a reduced cross-linking effect. It is therefore imperative to develop better methods to increase the oxygen concentration within the corneal stroma during the A-CXL process. Photocatalytic oxygen-generating nanomaterials are promising candidates to solve the hypoxia problem during A-CXL. Biocompatible graphitic carbon nitride (g-C 3 N 4 ) quantum dots (QDs)-based oxygen self-sufficient platforms including g-C 3 N 4 QDs and riboflavin/g-C 3 N 4 QDs composites (RF@g-C 3 N 4 QDs) have been developed in this study. Both display excellent photocatalytic oxygen generation ability, high reactive oxygen species (ROS) yield, and excellent biosafety. More importantly, the A-CXL effect of the g-C 3 N 4 QDs or RF@g-C 3 N 4 QDs composite on male New Zealand white rabbits is better than that of the riboflavin 5’-phosphate sodium (RF) A-CXL protocol under the same conditions, indicating excellent strengthening of the cornea after A-CXL treatments. These lead us to suggest the potential application of g-C 3 N 4 QDs in A-CXL for corneal ectasias and other corneal diseases.
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CARBON
·
2024
·
IF 10.5
Kaiming Wang,Xin Gong,Xinyu Ye,Jinxu Li,Yang Yang,Huacheng Zhu,Yuesheng Wang,Liping Yan,Yanping Zhou
Biomass char is very promising in developing microwave absorbing materials with low minimum reflection loss (RL min ) and ultrawide effective absorption bandwidth (EAB) owing to its low cost and natural availability of various pores, but however is facing a dilemma between the conduction loss and interface polarization loss where new heating technology is highly desirable. In this work, a microwave confined plasma/microwave hybrid heating technology is developed based on the unique interaction between porous carbon and microwave for simultaneous enhancement of conduction loss and interface polarization loss of cellulose char. Compared to the conventional heating product at the same temperature, the as-prepared microwave char showed almost doubled conductivity which is beneficial for conduction loss, higher content of C –O bond that has longer bond length and dielectric susceptibility than C O bond, and more condensed carbon nanoparticles embedded in the carbon matrix which is responsible for increasing the heterointerface polarization loss. As such the tangent loss of MW900-40 % ranges from 0.69 to 0.97 while that of CH900-40 % only ranges from 0.34 to 0.64 in the frequency range of 2.0–18.0 GHz. Further, based on multilayer impedance gradient principle, a double-layer absorber is constructed with products of different MW900 loading, yielding a RL min of −59.0 dB at 15.9 GHz with an EAB of 10.0 GHz at 4.0 mm, whose working mechanism is comprehensively studied by simulations in terms of impedance matching and microwave dissipation distribution.
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