PROTEIN JOURNAL
·
2017
·Vol. 36
·期 3
·166-173
·
IF 1.139
Wang Ying,Jiang Yiqun,Yin Yongguang,Liu Jiyun,Ding Long,Liu Jingbo,Zhang Ting
Angiotensin I-converting enzyme (ACE, EC.3.4.15.1) inhibitory peptide is an efficacious therapy for hypertension. In this study, four dipeptides, TY, FD, FL and FG, were identified from the desalted fraction of bovine hemoglobin hydrolysate, obtained by in vitro simulated gastrointestinal digestion, via liquid chromatography-tandem mass spectrometry (LC-MS/MS). The IC 50 value of TY and FL are 96.43 ± 6.17 and 290.66 ± 57.92 μM, respectively. The result of molecular docking indicated that TY occupied the ACE subsite S1 and S1′ with a lowest estimated binding energy of −9.96 Kcal/mol, while FL occupied the subsite S5 with a lowest estimated binding energy of −9.37 Kcal/mol. The subsite S1′ and S2′ are closer to the ACE active center (Zn 2+ ) than S5, and the lowest estimated binding energy of TY is lower than that of FL. This work provided new ACE-inhibitory peptides derived from bovine hemoglobin hydrolysate and explained their inhibitory mechanism.
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RADIOCHIMICA ACTA
·
2022
·Vol. 111
·期 1
·63-71
·
IF 2.083
Peng Liu,Zhuang Shen,Jiaxian Cheng,Zhen Han,Wenda Xu,Mingbo Ji,Fuqiu Ma
Due to the relative abundance, long half-life and high mobility of radioactive cesium (Cs), new adsorbents are urgently needed to treat Cs to ensure public health. In this study, a graphene oxide (GO) based adsorbent for Cs(I) adsorption was prepared by 1-aza-18-crown-6 ether modification. XRD, FT-IR, XPS and SEM results showed that the properties of 1-aza-18-crown 6 ether modified GO (18C6-GO) changed dramatically compared with that of raw graphite. The adsorption properties of 18C6-GO for Cs(I) were studied by batch static adsorption experiments. The results showed that the adsorption equilibrium time of 18C6-GO was 20 h. Kinetic study revealed that the adsorption rate of Cs(I) conformed to pseudo-second-order kinetic model. Langmuir adsorption isotherm simulation indicated that the adsorption arises at homogeneous adsorption sites on 18C6-GO. Therefore, crown ether modified GO may have implications for the treatment of wastewater.
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MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Yujie Han,Xujie Su,Lifang Fan,Zhiguang Liu,Yujing Guo
Cardiac troponin I (cTnI) is a “gold standard biomarker” for clinical diagnose of acute myocardial infarction (AMI) . Rapid, accurate, and sensitive detection methods for cTnI are highly urgent and significant in early diagnosis and progression control. In this work, we proposed an electrochemical aptasensing platform for cTnI detection based on copper nanowires/molybdenum disulfide/reduced graphene oxide (CuNWs/MoS 2 /rGO) ternary nanostructure. The CuNWs/MoS 2 /rGO composite exhibited improved electrochemical activity due to the high electrochemical conductivity and the synergistic effect among each component, and the large surface area, which also facilitates the immobilization of aptamers. As a result, the constructed electrochemical cTnI aptasensor shows good selectivity, stability, and reproducibility towards cTnI. Under optimized conditions, the aptasensor responses cTnI linearly from 5.0 × 10 −13 to 1.0 × 10 −10 g mL −1 with a detection limit of 1.0 × 10 −13 g mL −1 (S/N = 3). The analysis of cTnI in human blood samples demonstrated its practicability with comparable results. This work offers an alternative way for facile fabrication of CuNWs/MoS 2 /rGO based aptasensor for clinical biomarker detection.
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CATALYSIS LETTERS
·
2018
·Vol. 148
·期 9
·2709-2718
·
IF 2.911
Liu Zhenzhen,Shen Zhongquan,Zhang Ning,Zhong Wei,Liu Xiaoming
Abstract Homogeneous Cu(I)/NMI/TEMPO catalyst system (TEMPO = 2,2,6,6-tetramethylpiperidine-N-oxyl) has been investigated for its catalysis on the aerobic oxidation of 1-octanol and other alcohols into aldehydes under room temperature. The catalytic species was found to be a Cu(I) centre coordinated by two NMI molecules and other two weakly bound solvent molecules, [Cu(NMI) 2 (Sol) 2 ] + (Sol = solvent). When CuI was used, this species could be [Cu(NMI)I(Sol) 2 ]. Not like being speculated previously, NMI in this system acts solely as a ligand and its role coordinated to the copper centre enhanced the electron density on the metal centre which promoted the O 2 binding in the catalysis. The labile solvent binding to the Cu(I) centre is essential to ensure both oxygen and substrate binding. The catalyst system is suitable for the oxidation of various alcohols using a simple reaction setup and workup. In particular, the system possesses strong oxidizing capability in quantitative conversion of benzylic alcohols regardless of the substituents on the phenyl ring and allylic alcohols into aldehydes. A plausible mechanism was also proposed for the catalysis. Graphical Abstract The aerobic oxidation of primary alcohols at room temperature to corresponding aldehydes was achieved by the catalyst composed by Cu(I) and methyl imidazole (NMI) mediated by TEMPO in acetonitrile. The catalytic species is proposed to be such a Cu(I) complex that two of its four coordinating sites are occupied by a strong ligand(s) and the rest two are weakly bound by solvent molecules.
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SOLAR ENERGY
·
2016
·
IF 3.685
Haifeng Yang,Jincheng Zhang,Chunfu Zhang,Jingjing Chang,Zhenhua Lin,Dazheng Chen,Xu Sun,He Xi,Genquan Han,Yue Hao
In this work, we demonstrated a high performance planar heterojunction perovskite solar cell with the polyethylenimine ethoxylated (PEIE) interlayer. By adopting a less polar solvent for PEIE, enhanced device performance and uniformity are achieved. The power conversion efficiency (PCE) of the best device increases by 22% compared to the reference device and reaches 14.82% with J SC of 19.45 mA/cm 2 , V OC of 1.00 V, and FF of 76.31% under AM 1.5G 100 mW/cm 2 light illumination. The UPS measurement shows that the PEIE layer can effectively decrease the energy offset between PCBM and metal electrode. The recombination mechanism was explored by measuring V OC and J SC at various light intensities from 100 to 0.1 mW/cm 2 . It shows that the PEIE layer can suppress the trap-assisted recombination for the devices. The enhancement of the probability of the carriers collection also shows that the recombination is reduced by the PEIE interlayer. Moreover, it is found PEIE layer can improve the stability of the device.
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Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 30
·9167-9174
·
IF 6.641
Chong Li,Baojun Ding,Lijing Zhang,Kepeng Song,Shengyang Tao
Organometal halide perovskite nanocrystals have received extensive attention as a high-performance photoelectric conversion material. However, the perovskite nanocrystals prepared by the traditional batch reactor have uncontrollable size and optical properties, low utilization of raw materials, and complicated purification treatment. In this paper, a flow microreactor is designed with the assistance of finite element analysis and realized the continuous synthesis of CH3NH3PbX3 nanocrystals with a 100% yield. The average size of the prepared nanocrystalline grains is as low as 3.9 nm without any purification step. The prepared nanocrystals have narrow-band emission characteristics (the full width at half-maximum is down to 18 nm), and the quantum yield can reach 76.9%. It is also possible to prepare CH3NH3PbX3 (X = Br, I) nanocrystals covering different emission wavelengths in the visible light region by this method. The coating of a polystyrene film improved the stability of the perovskite nanocrystals. The flexible hybrid film is applied to modify a LED device, and a white LED luminescence spectrum is obtained.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yuhua Zhen,Xinyu Cai,Wenjie Yang,Yuanyue Qie,Jiahao Li,Gaohui Ren,Wei Xing,Qingzhong Xue,Hongxia Geng
Sulfide solid electrolytes (SSEs) are promising materials for developing safe and high-performance all-solid-state lithium batteries (ASSLBs). However, enhancing the ionic conductivity, air stability, and electrolyte/electrode interface compatibility of vulcanized solid electrolytes simultaneously remains a significant challenge. Here, we propose a dual doping strategy (In 2 S 3 and LiI) based on liquid-phase method for the preparation of SSEs. In 2 S 3 and LiI can widen the Li + diffusion pathways and enhance the ionic conductivity. Meanwhile, In 2 S 3 can enhance the (electro)chemical stability and suppress the formation of lithium dendrites and H 2 S. Consequently, the prepared Li 7 P 2.94 In 0.1 S 10.9375 I 0.125 (LPInSI) solid electrolyte exhibited high ionic conductivity (2 mS·cm −1 ), excellent electrochemical stability, and air stability at 25 ℃. Based on this, ASSLBs fabricated with Li-In alloy anodes enhance the compatibility of the electrolyte/electrode interface, deliver a discharge capacity of 165.2 mAh·g −1 at room temperature, and retain 87.6 % of the specific discharge capacity after 300 cycles at 0.2 C. This study offers a viable approach for the synthesis of practical SSEs and high-performance ASSLBs.
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ACS Omega
·
2024
·
IF 3.7
Ruonan Yao,Jiawei Lin,Kunjie Liu,Yuanchang Xu,Boyi Xiao,Jing Zhao,Zhongnan Guo,Quanlin Liu,Wenxia Yuan
Low-dimensional tin-based halide perovskites are considered as eco-friendly substitutions of the iconic lead-based perovskites to host the potential as optoelectronic materials. However, a fundamental understanding of the structure–property relationship of these Sn(II)-based hybrids is still inadequate due to the limited members of this material family. To our knowledge, there is still lack of reports on a series of Sn(II)-based halide perovskites with the same organic cation but covering chloride, bromide, and iodide. In this work, three new halide perovskites TMPDASnX4 (X = Cl, Br, I) (TMPDA = N,N,N′,N′-tetramethyl-1,4-phenylenediamine) are successfully synthesized, which provide the ideal paradigm to study the halogen-dependent evolution of the structure and properties of Sn(II)-based hybrid perovskites. Despite sharing the same monoclinic lattice (P21/m space group), it is demonstrated that TMPDASnCl4 adopts a one-dimensional structure composed of a five-coordinated pyramid configuration due to an extremely long Sn···Cl distance, while the typical two-dimensional motif is still maintained in TMPDASnBr4 and TMPDASnI4. The ambient stability is declined in the order from chloride to bromide and then to iodide. TMPDASnCl4 exhibits a broad-band bluish-white-light emission (centered at 515 nm, full width at half-maximum (fwhm) = 193 nm) with the Commission Internationale de l′ Elairage (CIE) coordinates as (0.29, 0.34). Further, the correlated color temperature and color-rendering index were determined as 7617 K and 80.5, respectively. Based on the synthesis of new crystals, our work sheds light on the composition–structure–property relationship of hybrid Sn(II)-based halide perovskites.
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Cell Reports
·
2025
·
IF 6.9
Tianzi Wei,Jiaxuan Li,Xiang Lei,Risheng Lin,Qingyan Wu,Zhenfeng Zhang,Shimin Shuai,Ruilin Tian
Adenosine-to-inosine (A-to-I) RNA editing is a critical post-transcriptional modification that diversifies the transcriptome and influences various cellular processes, yet its regulatory mechanisms remain largely unknown. Here, we present two complementary CRISPR-based genetic screening platforms: CREDITS (CRISPR-based RNA editing regulator screening), which enables genome-scale identification of editing regulators using an RNA recorder-based reporter system, and scCREDIT-seq (single-cell CRISPR-based RNA editing sequencing), which provides multiplexed single-cell characterization of transcriptome and editome changes for pooled perturbations. By screening 1,350 RNA-binding proteins, we identified a series of A-to-I editing regulators. Mechanistic investigation revealed DDX39B as a global repressor of A-to-I editing, which functions by preventing double-stranded RNA accumulation through its helicase activity. Targeting DDX39B significantly enhances the efficiency of RNA-editing-based tools, such as CellREADR (cell access through RNA sensing by endogenous ADAR) and LEAPER (leveraging endogenous ADAR for programmable editing of RNA), and disrupts hepatitis D virus (HDV) RNA editing homeostasis. These technological advances not only expand our understanding of RNA editing regulation but also provide powerful tools for exploring tissue-specific and context-dependent RNA modification mechanisms, with broad implications for therapeutic development.
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Micromachines
·
2025
·Vol. 16
·期 3
·270
·
IF 3
Jiangbo Wu,Zihan Yan,Yongqing He,Jie Liu,Yao Lv
Deterministic lateral displacement (DLD) is a passive particle separation method based on microfluidic technology, with its separation mechanism primarily relying on particle size differences. Therefore, the critical separation size is of great significance in the design of DLD devices. The geometric asymmetry of the pillar array design significantly influences fluid behavior and critical particle size variations. This study first analyzed particle motion characteristics through particle trajectory observation experiments within asymmetric microfluidic chips. Subsequently, a two-dimensional numerical simulation method was employed to investigate the effects of three different ratios of lateral gap size to downstream gap size (Gx:Gy) on particle trajectories and flow field distribution. The results indicate that as Gx:Gydecreases, the upward flow rate gradually reduces, accompanied by changes in the flow field velocity distribution, causing particles to favor displacement mode. This study provides new theoretical foundations for the precise regulation of particle motion behavior and introduces novel insights for optimizing DLD device design.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Na Lin,Xin Wang,Hong-Yan Zhang,Kai-Qi Sun,Li Xiao,Xin-Yue Zhang,Cheng-Yang Yue,Li Han,Zhi-Wei Chen,Xiao-Wu Lei
Commercially available rare-earth-doped inorganic oxide materials have been widely applied as X-ray scintillators, but the fragile characteristics, high detection limit, and harsh preparation condition seriously restrict their wide applications. Furthermore, it remains a huge challenge to realize X-ray flexible imaging technology for real-time monitoring of the curving interface of complex devices. To address these issues, we herein report two isostructural cuprous halides of zero-dimensional (0D) [AEPipz]CuX3·X·H2O (AEPipz = N-aminoethylpiperazine, X = Br and I) with controllable size to nanosize crystal as highly efficient scintillators toward flexible X-ray imaging. These cuprous halides exhibit highly efficient cyan photoluminescence and radioluminescence emissions with the highest quantum yield of 92.1% and light yield of 62,400 photons MeV–1, respectively, surpassing most of the commercially available inorganic scintillators. Meanwhile, the ultralow detection limit of 95.7 nGyair s–1 was far below the X-ray dose required for diagnosis (5.5 μGyair s–1). More significantly, the flexible film is facilely assembled with excellent foldability and high crack resistance, which further acts as a scintillation screen achieving a high spatial resolution of 17.4 lp mm–1 in X-ray imaging, demonstrating the potential application in wearable radiation radiography. The combined advantages of high light yield, low detection limit, and excellent flexibility promote these 0D cuprous halides as the most promising X-ray scintillators.
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Materials Today Chemistry
·
2025
·
IF 6.7
Pengyu Zhang,Yiping Du,Chen Li,Lin Ma,Jiawen Xiao,Zhengguang Yan
Low-dimensional hybrid Cu(I)-based halide materials are a new class of materials with low toxicity and excellent photoluminescent properties. In this work, five novel single crystals of [1,4-BDA]Cu 2 X 4 (X = Cl, Br, I) (1,4-BDA: 1,4-butanediamine) and [1,3-PDA] 2 Cu 3 X 7 (X = Cl, Br) (1,3-propanediamine) were obtained using a solvent evaporation method. The [1,4-BDA]Cu 2 X 4 (X = Cl, Br, I) crystals all have 1D structures, while the [1,3-PDA] 2 Cu 3 X 7 (X = Cl, Br) crystals have 0D structures. All five single crystals exhibit broadband blue emissions under 254 nm UV excitation at room temperature. Interestingly, both crystals show a gradual blueshift of the emission peaks with increasing halogen atomic mass, realizing tunable emission from the dark blue to sky blue range. The energy transfer process of the [1,4-BDA]Cu 2 Br 4 single crystal was studied using temperature-dependent photoluminescence spectroscopy. Combined with density-functional theory calculations, the reason for the shift of the PL emission peaks is explained. Notably, by altering the chemical composition, different photoluminescent halide materials can be obtained. Providing insight into the discovery of new low-toxicity, low-cost Cu(I)-based halide materials.
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