JOURNAL OF LUMINESCENCE
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2018
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IF 2.732
Ziyue Ni,Ting Ye,Yali Yu,Longlong Gao,Yifan Fei,Qiusha Li,Yufeng Zhou,Yong Shao,Lintao Zeng
DNA apurinic/apyrimidinic site (AP site) has received much attention due to its importance in disease evolution and development of selective genetic drugs. Fluorescence technique has been widely employed in identifying the AP sequence environment using fluorophores as the AP site-targeting probes. However, the sequence effect on the AP site binding of a ligand should be fully understood for illustrating the binding behavior. Triplex-forming oligonucleotide (TFO) can bind with its partner ds-DNA via specific hydrogen bonding interactions different from the canonical Watson-Crick pattern to form a triplex DNA structure . Due to its wide bioactivity, triplex has been recently investigated using small molecules as the structure identifiers and tuners. In this work, we spectroscopically characterized a novel fluorescent benz[ e ]indolium probe of BIFS and found that BIFS can selectively target the AP site and its fluorescence is significantly enhanced only when the TFO strand binds to the AP site-containing duplex DNA. The TFO binding restricts the non-radiative twist relaxation process of the excited state BIFS and results in the emissive BIFS. Because BIFS alone in aqueous solution is non-fluorescent, this selective lighting-up emission is advantageous for developing a practical sensor to target the triplex AP site with a weak fluorescence background. This selective recognition of the AP site by the lighting-up fluorescent probe would find wide applications including fluorescently evaluating the triplex-based small molecular binders.
研究领域:
分子生物学
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遗传学
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化学
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生物化学
✓ 已验证
DOI
高影响因子
Journal of Energetic Materials
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2024
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IF 1.7
Jing-Si Sun,Hong-Jie Li,Jing-Zhuo Gao,Ting-Run Li,Ze-Cheng Hu,Rui-Feng Wu,Ying Wang
Organic-inorganic double-coated aluminum nanopowders (HTPB/Cu/nAl) were synthesized using a one-pot method. The morphology and structure were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). The analysis revealed that Cu particles were uniformly dispersed around the nAl core, while HTPB formed a coating on the Cu/nAl surface. The thermal oxidation kinetics and catalytic effects on ammonium perchlorate (AP) were investigated through differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results indicated a 9% increase in the active aluminum content of the double-coated nanopowders compared to uncoated nAl, and a reduction in the average activation energy for thermal oxidation from 297.75 kJ·mol-1 to 218.85 kJ·mol-1. The HTPB coating enhanced the friction and impact sensitivity of the Cu/nAl particles. Adding 5% HTPB/Cu/nAl to AP advanced the low- and high-temperature decomposition peaks by 5°C and 40°C, respectively, while reducing the activation energy of AP from 85.61 kJ·mol-1 to 79.79 kJ·mol-1. This addition significantly influenced the thermal decomposition of AP, improving combustion efficiency and enhancing compatibility within composite propellant formulations.
研究领域:
材料科学
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燃烧与推进
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
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2025
·Vol. 17
·期 14
·1994
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IF 4.9
Xuyang Wu,Hongbao Wang,Chenglong Jiao,Benbo Zhao,Shixiong Sun,Yunjun Luo
Al-based nanocomposite energetic materials have broad application prospects in explosives and propellants, owing to their excellent energy release efficiency. However, their insufficient reliability, poor stability, and difficulty of formation limit their practical application. This study employed self-assembly using a hydrophilic polymer polyvinylpyrrolidone (PVP) together with nano-aluminum powder (Al), copper oxide (CuO), and ammonium perchlorate (AP) to obtain high-strength and high-activity composite micrometer-sized microspheres. The influence of PVP concentration on the mechanical behavior of Al/AP composite microspheres was systematically investigated, and Al was replaced with ultrasonically dispersed Al/CuO to explore the mechanism of action of PVP in the system and the catalytic behavior of CuO. PVP significantly enhanced the interfacial bonding strength. The Al/AP/5%PVP microspheres achieved a strength of 8.4 MPa under 40% compressive strain, representing a 365% increase relative to Al/AP. The Al/CuO/AP/5%PVP microspheres achieved a strength of 10.2 MPa, representing a 309% increase relative to Al/CuO. The mechanical properties of the composite microspheres were improved by more than threefold, and their thermal reactivities were also higher. This study provides a new method for the controlled preparation of high-strength, high-activity, micrometer-sized energetic microspheres. These materials are expected to be applied in composite solid propellants to enhance their combustion efficiency.
研究领域:
材料科学
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化学工程
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能源材料
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燃烧技术
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推进剂化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FirePhysChem
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2021
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IF 0
Ming Zhang,Fengqi Zhao,Hui Li,Yanjing Yang,Ting An,Yifan Jiang,Na Li
The spherical, hollow and tubular Fe 2 O 3 (s, h and t) and their graphene-based nanocomposites rGO-Fe 2 O 3 (s, h and t) were fabricated using the facile solvothermal methods. The morphologies and compositions of the as-synthesized Fe 2 O 3 (s, h and t) and rGO-Fe 2 O 3 (s, h and t) nanocomposites were systematically characterized by SEM, TEM, XRD, FTIR and XPS methods. Then, the effect of the catalytic performance of Fe 2 O 3 (s, h and t) and rGO-Fe 2 O 3 (s, h and t) nanocomposites on the thermal decomposition of ammonium perchlorate (AP) were studied by DSC method. The DSC results showed that all of the Fe 2 O 3 (s, h and t) and rGO-Fe 2 O 3 (s, h and t) nanocomposites can effectively promote the thermal decomposition of AP. Besides, rGO-Fe 2 O 3 (s) nanocomposite has the best catalytic performance, and the high-temperature decomposition exothermic peak of AP was significantly reduced after its mixing with rGO-Fe 2 O 3 (s) nanocomposite. It can be seen that the effects of Fe 2 O 3 on AP decomposition is mainly reflected in the high temperature process, while the effects of rGO-Fe 2 O 3 (s) on AP decomposition is reflected in both high and low temperature stages, and the effect on the high temperature stage is more significant. The excellent catalytic performance of rGO-Fe 2 O 3 (s) nanocomposite can be attributed to the in-situ growth of Fe 2 O 3 on the surface of rGO, which contributes to the low temperature decomposition process of AP.
研究领域:
材料科学
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化学
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纳米技术
✓ 已验证
DOI
INTERNATIONAL DAIRY JOURNAL
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2021
·
IF 3.032
Xin Hu,Yaping Pan,Mutai Bao,Xiuli Zhang,Chengyi Luo,Xiao Han,Fengshu Li
A novel exopolysaccharide (APS) was secreted by Chryseobacterium sp. AP-2. The yield of APS reached 3.247 g L −1 in MRS medium with 2% (w/v) maltose during 72 h incubation. The APS was a 4.871 × 10 5 Da heteropolysaccharide with rhamnose, fucose, mannose , glucose and galactose ; using Fourier transform infrared spectroscopy , the main groups in APS were found to be hydroxyl and phosphate groups. APS exhibited a flaky structure with irregular holes, and its structural composition was confirmed by 1 H and 13 C nuclear magnetic resonance analysis. The degradation temperature (197.3 °C) of APS was determined by thermogravimetric analysis. APS exhibited stable emulsification property with the higher emulsification indexes (EI) than 50% in the diesel oil and kerosene. Ultimately, physicochemical factor (temperature, pH values and salts) had an impact on rheological properties of APS. The properties and structure characterisation of APS laid the experimental foundation for further exopolysaccharide exploration.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Wei Liu,Taixin Liang,Jiangbo Zhang,Fei Xiao,Houhe Chen
Intermolecular energetic materials (IEMs) have become the focus of attention due to their excellent performance in combustion, ignition, energy release and sensitivity. In this paper, two IEMs were successfully designed and prepared by the self-assembly of 5-aminotetrazole (5-ATZ) and transition metal ions on the surface of ammonium perchlorate (AP) particles. The scanning electron microscope, infrared spectroscopy, powder X-ray diffraction, thermogravimetric analyses, and differential thermal analyses were employed to characterize the prepared samples. The results show that the surface of AP particles is completely covered by a uniform and dense M(5-ATZ) 4 Cl 2 (M = Cu, Co) self-assembled layer. Thermal analyses show that the high-temperature decomposition peak temperatures of AP/Cu(5-ATZ) 4 Cl 2 (10 wt%) and AP/Co(5-ATZ) 4 Cl 2 (10 wt%) are decreased by 93.3 °C and 127.1 °C compared to the case of pure AP, while the heat releases of them are increased by 539 J∙g −1 and 580 J∙g −1 . In addition, the burning rates of AP/Cu(5-ATZ) 4 Cl 2 /Al (10 wt%) and AP/Co(5-ATZ) 4 Cl 2 /Al (10 wt%) are increased by 6.8 mm∙s −1 and 7.8 mm∙s −1 compared with the case of AP/Al. Moreover, the hygroscopicity tests show that the prepared samples do not agglomerate aftter being placed in the atmosphere with a relative humidity of 79% for 66 h. This research shows considerable application prospects in improving the combustion and energy performance of solid propellants, it is also a reference for the design and preparation of other novel IEMs.
研究领域:
材料科学
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能量材料
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化学
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表面科学
✓ 已验证
产品关联
DOI
高影响因子
COMBUSTION AND FLAME
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2022
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IF 5.767
Lyu Jie-Yao,Yang Su-Lan,Wu Shixi,Tang Gen,Yang Wenming,Yan Qi-Long
Burning rate modulation is a critical but challenging technology for solid propellants’ design. Great efforts have been made to synthesize and utilize catalysts to modify the pressure exponent ( n ), but poor catalytic efficiency and lower energy level of conventional catalysts limit their further applications. In this research, interfacial control of Al@AP together with precise catalysis of CuO is represented for the purpose of pressure exponent reduction and combustion performance improvement. The core-shell structured Al@AP and Al@AP/CuO composites were prepared and applied into HTPB/Al/AP composite propellants. These prepared propellants have the same formula but different micro-structures of ingredients, leading to varied combustion performance, in terms of the burning rates, combustion wave structures, flame spectra, agglomeration processes of Al particles and condensed combustion products . The investigation results show that by using interfacial control of Al@AP and precise catalysis of CuO, the n of involved propellants over 1–4 MPa can be greatly decreased from 0.42 to 0.21 and the agglomeration of Al could be effectively inhibited. In addition, propellants based on Al@AP and Al@AP/CuO interfacial controls of this research are summarized and compared together with those based on Al@RDX published recently, to present overall characteristics of interfacial control techniques, which could lead to the development of new smart controllable propellants.
研究领域:
材料科学
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推进技术
✓ 已验证
产品关联
DOI
高影响因子
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
·
2024
·
IF 4.2
Xiaoyi Huo,Yinna Wang,Zheming Liu,Jia Liu,Hang Zhu,Yong Zhou,Yilong Man,Xiaomao Zhou,Haihao Ma
The slowpoke channel responds to the intracellular calcium concentration and the depolarization of the cell membrane. It plays an important role in maintaining the resting potential and regulating the homeostasis of neurons, but it can also regulate circadian rhythm, sperm capacitation, ethanol tolerance, and other physiological processes in insects. This renders it a potentially useful target for the development of pest control strategies. There are relatively few studies on the slowpoke channels in lepidopteran pests, and their pharmacological properties are still unclear. So, in this study, the slowpoke gene of Plutella xylostella ( Pxslo ) was heterologous expressed in HEK293T cells, and the I-V curve of the slowpoke channel was measured by whole cell patch clamp recordings. Results showed that the slowpoke channel could be activated at −20 mV with 150 μM Ca 2+ . The subsequent comparison of the electrophysiological characteristics of the alternative splicing site E and G deletions showed that the deletion of the E site enhances the response of the slowpoke channel to depolarization, while the deletion of the G site weakens the response of the slowpoke channel to depolarization. Meanwhile, the nonspecific inhibitors TEA and 4-AP of the Kv channels, and four pesticides were tested and all showed an inhibition effect on the PxSlo channel at 10 or 100 μM, suggesting that these pesticides also target the slowpoke channel. This study enriches our understanding of the slowpoke channel in Lepidopteran insects and can aid in the development of relevant pest management strategies.
研究领域:
昆虫学
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药理学
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分子生物学
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害虫管理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMBUSTION SCIENCE AND TECHNOLOGY
·
2025
·
IF 1.5
Wenke Zhang,Jianzhong Liu,Huanhuan Gao,Haitian Gong
To investigate the detailed combustion processes of solid propellant components near the burning surface, this study develops a microscopic ignition and combustion experimental method and establishes a corresponding test system. A high-power microscope and image sensor are employed to continuously record the ignition and combustion of thin-film solid propellants (TFSP, AP/HTPB/Al). By integrating existing theories with image processing techniques, the combustion behavior of AP, Al, and the TFSP as a whole is analyzed in detail. A refined combustion surface model is constructed based on decomposition results, offering theoretical support for ignition combustion modeling and its integration with agglomeration models. Quantitative analysis reveals that reducing AP particle size in TFSP significantly enhances burning rate and combustion surface irregularity. This approach enables the observation of finer combustion behaviors and provides a novel perspective for solid propellant ignition and combustion research.
研究领域:
固体推进剂燃烧
·
微观分析
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燃烧建模
·
含能材料
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Jiahao Yu,Yong Kou,Hongbing Lei,Qiangqiang Lu,Lei Xiao,Hongyu Yang,Xuran Xu,Junqing Yang,Wei Jiang,Gazi Hao
Ammonium perchlorate (AP) plays an important role in solid propellants because of its high specific impulse, high energy density and low cost. However, the excellent performance cannot conceal the many shortcomings of AP, and the problems of non-concentrated exothermic, high sensitivity and hygroscopicity still seriously impede its application in solid propellants. In this study, the solvent evaporation method is used to directionally modify the order of the cupric oxide (CuO) and fluororubber (F 2603 ) shell layers so as to obtain AP-based composites with different core-shell structures. The interlayer binding energies of the composites with different structures are explored by theoretical calculations, and it is demonstrated that AP-based composites have excellent stability. In addition, CuO with valence-band holes not only reduces the peak temperature of the high temperature decomposition of AP (440.4 to 354.5 °C), but also enhances its combustion properties by undergoing thermite reaction with Al. Furthermore, the excellent hydrophobicity and barrier properties of F 2603 greatly strengthened the hydrophobicity and mechanical properties of the AP-based composites and reduced their sensitivity. In summary, the core-shelled structures AP-based composites prepared by this strategy possessed 5-in-1 excellent properties, which provided a new idea for targeted modulation of the properties of energetic materials.
研究领域:
材料科学
·
推进剂技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMBUSTION AND FLAME
·
2025
·
IF 6.2
Yanggang Huang,Yong Kou,Ting Chang,Jiaqi Wei,Hongfei Liu,Lei Xiao,Wei Jiang,Gazi Hao
Aiming at the critical issues of uneven dispersion, inadequate interfacial contact, and significant mass/heat transfer resistance inherent in the mechanical mixing process for traditional solid propellant charging, this study proposes a novel strategy for constructing energetic micro-units through core-shell structural design, with the aim of achieving highly reactive and integrated composites tailored for practical solid propellant applications. Using etched aluminum (Al) powder as the core and ammonium perchlorate (AP) together with hexanitrohexaazaisowurtzitane (CL-20) as the composite shell, Al@AP/CL-20 micro-units with uniform coatings of AP/CL-20 and well-defined core-shell structures were successfully fabricated via solvent evaporation. The thermogravimetric-differential scanning calorimetry (TG-DSC) and combustion analyses indicate that Al@AP/CL-20 energetic micro-units exhibit significantly earlier decomposition peak temperature compared to pure AP, larger and more concentrated exothermic peaks, as well as stronger combustion intensity and higher flame temperature than the Al/AP/CL-20 composite in the physical mixture. The result confirms that the Al@AP/CL-20 composite structure can effectively enhance the synergistic effect between components, thereby improving the performance of the micro-units. Moreover, as the etching time increases, the porosity of the Al powder surface rises, leading to a further enhancement in the combustion performance of the Al@AP/CL-20 energetic micro-unit. In particular, when the Al powder etching time reached 5 h and the mass ratio of Al/AP/CL-20 was 1:2:2, the Al@AP/CL-20 micro-units demonstrated the best combustion performance, with the highest light intensity and a maximum flame temperature of 1094 °C — a 49 % improvement over the physically blended sample (PAAC-2) with the same mass ratio. This is attributed to the well-defined core-shell structure, which significantly shortens mass and heat transfer distances between components, and a better-matched oxygen balance that imparts the best combustion efficiency. The study affirms that the core-shell energetic micro-unit strategy effectively overcomes the limitations of conventional mixing methods and provides a pathway for formulating highly reactive solid propellant with enhanced energy release efficiency.
研究领域:
材料科学
·
推进剂化学
·
纳米复合材料
·
燃烧学
·
热力学
·
功能材料
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
COMBUSTION SCIENCE AND TECHNOLOGY
·
2022
·
IF 2.133
Shuang Xu,Aimin Pang,Jie Kong
The liquid burning rate suppressants (BRSs) at room temperature were first prepared by combining urea with adsorption group from AP-bonding agents. The novel urea BRSs were applied in triethylene glycol dinitrate (TEDGN) plasticized hydroxyl-terminated polyether (HTPE) propellants. The results show that only 0.5% of them can reduce the burning rate and pressure index of the propellants at the same time. Owing to the adsorption group from AP bonding agents, the novel urea BRSs can adsorb onto the surface of AP during mixing by themselves, which are more suitable for industrial application than nano-sized or encapsulated BRSs. In addition, the desirable mechanical performance can be obtained and the BRSs have little influence on the hazardous properties of propellants.
研究领域:
推进剂化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）