MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 12
·1-11
·
IF 5.833
Wang Xiao,Liao Xiaochen,Zhang Bingjian,Zhang Mengmeng,Mei Lisha,Wang Fangwai,Chen Siyu,Qiao Xiuwen,Hong Chenglin
Abstract Carcinoembryonic antigen levels in the human body reflect the conditions associated with a variety of tumors and can be used for the identification, development, monitoring, and prognosis of lung cancer, colorectal cancer, and breast cancer. In this study, an amperometric immunosensor with CuCo/carbon nanocubes (CuCo/CNC) as the signal label is constructed. The bimetal-doped carbon skeleton structure has a high specific surface area and exhibits good electrocatalytic activity. In addition, Au/g-C 3 N 4 nanosheets (Au/g-C 3 N 4 NSs) are used to modify the substrate platform, facilitating the loading of more capture antibodies. The reaction mechanism was explored through electrochemical methods, X-ray powder diffraction, X-ray photoelectron spectroscopy, and other methods. Kinetic studies have shown that CuCo/CNC have good peroxidase-like activity. In addition, the electrocatalytic reduction ability of CuCo/CNC on hydrogen peroxide can be monitored using amperometric i – t curve (− 0.2 V, vs. SCE), and the response current value is positively correlated with the CEA antigen concentration. The prepared electrochemical immunosensor has good selectivity, precision, and stability. The dynamic range of the sensor was 0.0001–80 ng/mL, and the detection limit was 0.031 pg/mL. In addition, the recovery and relative standard deviation in real serum samples were 97.7–103 % and 3.25–4.13 %, respectively. The results show that the sensor has good analytical capabilities and can provide a new method for the clinical monitoring of CEA. Graphic abstract
研究领域:
生物医学工程
·
肿瘤学
·
分析化学
✓ 已验证
DOI
高影响因子
HISTORICAL ARCHAEOLOGY
·
2024
·
IF 0.4
Ryzewski Krysta
Hamtramck, a small, century-old city completely enveloped by Detroit, is promoted by its leadership as “the world in 2.1 square miles.” This slogan invokes two inextricable facets of the city’s heritage and contemporary identity: Hamtramck’s longstanding reputation as a proud, working-class city that has always been welcoming to immigrants, and its significance as the former home of automotive manufacturer Dodge Main, whose operations between 1910 and 1979 positioned the city as a global industrial powerhouse. The Old Hamtramck Center Project combines historical, archaeological, and geospatial sources of data to examine the process of urban expansion in the new city, which included the dissonant relationships among local communities and the built environment. Archaeological investigations within Old Hamtramck Center consider how the city’s residents experienced the often inconsistent circumstances of rapid urbanization and civic organization as the rural village transformed into a crowded industrial city during the early 20th century.
研究领域:
考古学
·
城市研究
·
历史学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 13
·10611-10625
·
IF 2.779
Qu Mengnan,Sun Wenchao,Xue Yuyu,Pang Yajie,Shi Fan,Luo Zhanxia,Wang Rong,Peng Lei,He Jinmei
Cellulose and its derivatives are biopolymers abundant in nature, with the advantages of low cost, biodegradability, and high positive friction polarity. In this paper, a novel friction positive layer material sodium carboxymethyl cellulose (CMC)-epichlorohydrin (ECH)-polyethyleneimine (PEI) aerogel (CEP aerogel) and polytetrafluoroethylene (PTFE) film are reported as a friction pair to prepare high-performance CEP aerogel based triboelectric nanogenerator (CEP-TENG) for mechanical energy harvesting and sensing fields. The systematic optimization of the preparation process of CEP aerogel to improve its friction positive polarity not only expands the field of friction positive layer materials but also facilitates its better application to TENG with excellent output performance. The corresponding CEP-TENG can produce open-circuit voltage of 203 V, short-current density of 8.2 µA/cm 2 , and a power density of 3.38 W/m 2 under the applied force of 15 N and frequency of 4 Hz, which is 13.5 times and 27.3 times higher than that of CMC aerogel and 0.03 mm PTFE film. In addition, CEP aerogel-based TENGs have been proven to be effective in powering electronic devices by charging commercial capacitors and detecting human motion such as finger tapping and arm bends. Therefore, the investigation demonstrates the feasibility of CEP aerogel as a friction layer material, thus providing insights to promote low cost-effective and environmentally friendly TENG development.
研究领域:
材料科学
·
能源技术
·
生物材料
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 60
·90248-90258
·
IF 5.19
Zhang Qian,Zhou Jinwen,Zhang Lishan,Zhong Shan,Ru Xuan,Shu Xiaohua
Pyrite affects the adsorption of tylosin (TYL) due to their coexistence in the lake system. As well as the reactivity groups of S–S-H, S-OH, and Fe-OH, defects also have the possibilities to influence the adsorption of organic contaminants. However, the role of these active sites in antibiotic adsorption on pyrite has not been deeply studied. Besides, pH, N, P, dissolved oxygen, and dissolved organic matter (DOM) fluctuate greatly in lake at different seasons, which may change the surface characteristics of pyrite. Hence, the adsorption of TYL on natural pyrite considered solution chemistry and DOM in lake water was explored in this study. The fitting results of the kinetic and isotherm models showed that the adsorption included physical and chemical interactions. The neutral initial solution pH was conductive to TYL adsorption owing to the combined result of electrostatic and cover of Fe-oxyhydroxide. NO 3 − and NH 4 + had no effect on TYL adsorption, whereas H 2 PO 4 − promoted adsorption by forming flocculent Fe(H 2 PO 4 ) 3 precipitates. The dissolved oxygen increased adsorption. This is due to the co-promotion of the pyrite oxidation by oxygen and sulfur defects. The Fe(II)-DOM complex caused by pyrite surface oxidation reduced the concentration of TYL in solution by gathering. Except for the surface charge, reactivity groups on pyrite significantly influenced the adsorption of TYL. The bond fracture of S–S resulted in sulfur defects that contributed to pyrite oxidation. As a result, Fe(III)/Fe(II) on the surface of pyrite or in solution produced a complex Fe(III)/Fe(II) with anions and DOM. In addition, Fe(III)-S on sulfur defects interacted with the O–H of TYL through hydrogen bonding. Furthermore, the Fe–O-C bond is formed by the interaction of C–OH on TYL and Fe(III) (hydr)oxides on the surface of pyrite. The study provides a deep insight into the effect of pyrite surface active sites on amphoteric antibiotic adsorption. It helps to understand antibiotic migration and interactions with widespread pyrite in the real environment. Graphical abstract
研究领域:
环境科学
·
水文学
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2022
·Vol. 65
·期 4
·719-725
·
IF 10.138
Zhang Yanhui,Li Fuming,Yang Rong,Yang Yun,Zhang Fangfang,Yang Zhihua,Pan Shilie
The design and synthesis of new deep-ultraviolet (DUV) optical materials are important but challenging. It is well known that the polarizability anisotropy of linear [BO 2 ] − is larger than those of [BO 3 ] 3− and [BO 4 ] 5− , which is the better choice for exploring excellent optical materials. Here, we search for such crystals in borate systems based on the unusual fundamental structural unit [BO 2 ] − . By combining the linear [BO 2 ] − with the traditional triangular [BO 3 ] 3− and tetrahedral [BO 4 ] 5− units, a new mixed metal borate, Rb 5 Ba 2 (B 10 O 17 ) 2 (BO 2 ) was obtained via high-temperature solution method. It exhibits excellent optical properties including a DUV transmission window (188 nm) and suitable birefringence (0.06). It also has good thermal stability and its crystal plates can be prepared easily. Furthermore, the strategies of designing borates with [BO 2 ] − units have been proposed from the transformation of crystal framework and the preparation method.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Nano Research
·
2023
·Vol. 17
·期 5
·3684-3692
·
IF 9.9
Wu Wenbo,Zhu Jiaye,Tong Yun,Xiang Shuangfei,Chen Pengzuo
Regulating the electronic structure of Bi-based materials by alloying engineering is promising to promote the electrocatalytic activity, but it remains some challenges to be solved. In this study, a facile electrochemical co-deposition strategy is developed to synthesize the bimetallic Bi 9 Cu 1 alloy nanosheet on carbon cloth (Bi 9 Cu 1 /CC), which represents a novel self-supporting electrode for the electrocatalytic carbon dioxide (CO 2 ) reduction reaction (CO 2 RR). The Bi 9 Cu 1 /CC catalyst has achieved a remarkable catalytic performance with high Faradaic efficiencies (FE) of over 90% for formate at wide potentials from −0.7 to −1.2 V vs. reversible hydrogen electrode (RHE). Moreover, the reversible Zn-CO 2 battery can be driven by Bi 9 Cu 1 /CC cathode with a largest power density of 1.4 mW·cm −2 , and superior operating stability. The systematic characterizations and electrochemical results confirm that the improved catalytic active sites, the enhanced mass/charge transport and the optimal reaction kinetics of Bi nanosheet are realized for CO 2 RR by Cu alloying. In situ attenuated total reflection infrared (ATR-IR) result confirms the bimetallic Bi-Cu active sites prefer to follow the ⋆OCHO conversion pathway. The density functional theory (DFT) calculations suggest that the Cu alloying contributes to the increased density of states near the Fermi surface of Bi and the optimized adsorption of ⋆OCHO intermediates on the Bi sites, resulting in the excellent catalytic performance.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
·
2024
·Vol. 81
·期 13
·11421-11457
·
IF 3.1
Shekhar Navin,Mondal Abhijit
Polylactic acid (PLA), a highly promising biodegradable biopolymer, has been extensively studied over the last two decades. The thermoplastic polyester PLA is bio-based, compostable, and eco-friendly. Its monomer, lactic acid, is fermented from renewable plant sources like starch and sugar. Therefore, PLA is regarded as a desirable substitute for conventional petroleum-based polymers. Because of its biocompatible and biodegradable properties, U.S. FDA (Food and Drug Administration) has approved PLA as a biomedical material. PLA has excellent mechanical, physical, structural, and thermal properties, making it suitable for various applications. However, PLA has limitations such as low impact toughness, hydrophobicity, and slow degradation rate at ambient temperatures. This can be improved by different modification methods, such as copolymerization, making composites or blends of PLA with other biodegradable polymers, or incorporating additives. This review presents information about the various methods of synthesis of PLA, its properties, and the environmental degradation of PLA. In addition, the different processing techniques of PLA are also reviewed. Lastly, the applications of PLA in sectors such as packaging, biomedical, agricultural, automotive, and textile are also discussed. Graphical Abstract
研究领域:
材料科学
·
环境科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2018
·Vol. 25
·期 5
·1531-1539
·
IF 1.858
Wang Shiwei,Chen Keyu,Wang Qibao
The catalytic performance of Yb(OTf) 2 –SO 3 –SBA-15 in the transformation of cellulose into lactic acid was investigated in this paper. The sol–gel technique and the chemical grafting approach were introduced to obtain the SBA-15 and Yb(OTf) 2 –SO 3 –SBA-15, respectively. Yb(OTf) 2 –SO 3 –SBA-15 catalysts were characterized by elemental analysis, ICP-OES, XRD, N 2 adsorption, FTIR, TGA, 29 Si-MAS NMR, SEM and TEM. It is found that the Yb(OTf) 2 –SO 3 –SBA-15 catalyst can catalyze the transformation of cellulose into lactic acid effectively. When the temperature is 220 °C and the reaction time is 60 min, the maximum yield of lactic acid can reach 74.06%. Yb(OTf) 2 –SO 3 –SBA-15 catalyst can be recycled for more than five times without noticeable loss in activity.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
European Journal of Wood and Wood Products
·
2023
·
IF 2.6
Yang Zheng,Liang Lulu,Dong Qing,Chen Furong,Pang Yajun,Chen Hao,Wu Sai,Shen Zhehong
Bamboo resources can contribute to reducing wood shortages and neutralizing CO 2 . However, laminated bamboo-veneer lumber (LBVL), the main bamboo product, has limited applications due to its poor bonding performance. It is because the urea-formaldehyde (UF) adhesive used in LBVL does not have high bonding stability, which results in the warping and cracking of the board. Therefore, a simple but effective method has been proposed to improve the bonding performance of UF adhesives. Specifically, UF adhesives are strengthened and toughened through a synergistic interaction with acrylate emulsion and clay minerals. Consequently, the prepared LBVL shows excellent bonding strength with an average dip-peeling of 0.92 cm. Furthermore, compared to the unmodified UF adhesive, the synergistically enhanced UF adhesive has a prolonged gelation time, a lower free formaldehyde release level, and improved thermal stability. In addition, the prepared LBVL exhibits reduced flammability based on cone calorimetry results. Herein, the combined effect of acrylate emulsion and clay minerals was investigated, resulting in a synergistic enhancement of bonding performance and other properties. This enhancement not only contributes to the reduction of wood shortages but also aids in the neutralization of CO 2 .
研究领域:
材料科学
·
林业工程
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2021
·Vol. 39
·期 12
·1538-1549
·
IF 3.603
Lin Sha,Sun Hui,Cornel Erik Jan,Jiang Jin-Hui,Zhu Yun-Qing,Fan Zhen,Du Jian-Zhong
Dented nanospheres show promising potential in drug delivery, nanomotors, etc . However, it is still challenging to prepare them by homopolymer self-assembly because of the strict structural requirements of the homopolymer. Herein, we propose a strategy for preparing dented nanospheres from homopolymers by co-assembly with a short peptide. They were co-assembled from poly(2-hydroxy-3-((4-(ethoxycarbonyl)phenyl)amino)propyl methacrylate) (PHBzoMA 59 ) and ( S )-2-(( S )-2-((((9 H -fluoren-9-yl)methoxy)carbonyl)amino)-3-phenylpropanamido)-3-phenylpropanoic acid (Fmoc-FF-OH). PHBzoMA homopolymers can only self-assemble into nanospheres without dent, and the addition of a short peptide introduced hydrogen bonding and complementary π-π stacking interactions led to the final dented nanosphere morphology. The weight fractions of the short peptide can be adjusted to regulate the final morphology. It was confirmed that the radius of curvature of the dent on the surface was related to the organic bubble inside the protospheres prepared at critical aggregation concentration (CAC). The organic bubble can be adjusted by altering the kind of organic solvent and solution pH, which allowed control over the dented nanosphere dimension. The use of different organic solvents with various polarities allows adjustment of the interfacial tension, and hence the denting degree. This degree can also be controlled by manipulating the solution pH to (de)protonate the short peptide and homopolymer. Furthermore, the versatility of this method was highlighted by using a different homopolymer and the applicability of the resulting dented nanospheres was demonstrated by decoration with gold nanoparticles. Overall, this study provided important insights and a new simple strategy to prepare dented nanospheres in a controlled fashion.
研究领域:
材料科学
·
生物化学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 18
·14535-14544
·
IF 2.779
Liu Feng,Yao Zhiqian,Xu Suqiong,Fan Xiaohong,Zhang Xianke,Yuan Jujun,Yu Yi,Zhu Xiurong,Xiong Zuzhou,Yu Huajun
In this study, we develop a synergistic strategy combining defect engineering and porous structures to increase the photocatalytic activity of graphitic carbon nitride (g-C 3 N x ) under simulated sunlight. The photocatalytic efficiency of porous g-C 3 N x containing nitrogen defects for the degradation of Rhodamine B (RhB) is about 3.5 times higher than that of pristine g-C 3 N 4 synthesized by direct calcination, which can be attributed to its large specific surface area and surface nitrogen defects. Trapping experiments and electron spin resonance tests reveal that superoxide radical (·O 2 − ) is confirmed to be the predominant active specie for photodegrading RhB.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY
·
2022
·Vol. 76
·期 12
·1-10
·
IF 2.944
Li Chengzhe,Wang Hua,Chen Xiaoming,Yao Jun,Deng Jianyu
Abstract Butterflies use visual and olfactory cues to identify conspecifics during courtship. Tirumala limniace , Idea leuconoe , and Danaus chrysippus are three species of butterflies with a sympatric distribution, and T. limniace butterflies are rarely seen to chase I. leuconoe or D. chrysippus during courtship in artificial cultivation gardens, indicating that they have a mechanism for recognizing conspecifics; however, there are no reports on what kind of signals they use to recognize conspecifics. In this study, we investigated the cues used by T. limniace to identify conspecifics and the relative roles of visual and olfactory cues. We found that in the absence of olfactory cues (visual cues only), male and female butterflies were able to identify the same species based on wing color and pattern. By collecting and identifying body volatiles emitted from T. limniace males and females, we found that the highest amounts were β -ocimene and β -pinene, which were sourced from the insects’ bodies (as opposed to sex pheromones). Furthermore, electroantennogram binding behavioral experiments showed that β -ocimene was involved in the process of species recognition and that the relative roles of olfactory cues were greater than those of visual cues at close range. Therefore, T. limniace males and females could utilize both visual and olfactory cues to identify conspecifics during courtship but preferred olfactory cues. The present study highlighted the important role of adult body odor rather than sex pheromones in butterfly species recognition. Significance statement Butterflies use visual (wing color and pattern) and olfactory (sex pheromones) cues to identify conspecifics during courtship. Butterflies also release volatiles emitted from their bodies during courtship. However, there is no clear evidence that body volatiles (as opposed to sex pheromones) emitted from butterflies are involved in species recognition. We studied the functions of body volatiles emitted from Tirumala limniace adults and the relative roles of visual and olfactory cues in species recognition during courtship. We found that male and female adults could identify conspecifics using only visual cues. Meanwhile, we also found that the highest amounts of β -ocimene, which came from the bodies of T. limniace males and females, were also involved in the process of species recognition. The olfactory cues that butterflies use to identify conspecifics are usually sex pheromones, while the present study highlighted the important role of adult body odor rather than sex pheromones in butterfly species recognition.
研究领域:
昆虫学
·
生态学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）