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Anthocyanins/chitosan films doped by nano zinc oxide for active and intelligent packaging: comparison of anthocyanins source from purple tomato or black wolfberry

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 6,   Pages 704-715 doi: 10.1007/s11705-022-2270-z

Abstract: The multifunctional films was prepared by blending chitosan and nano-ZnO with purple tomato anthocyanins or black wolfberry anthocyanins. The properties of films functioned by anthocyanins source and nano-ZnO content were studied. It was found purple tomato anthocyanins showed more significant color change against pH than black wolfberry anthocyanins. The nano-ZnO were widely dispersed in matrix and enhanced the compatibility of anthocyanins with chitosan. However, the anthocyanins source influenced the properties of the films more slightly than nano-ZnO addition. The tensile strength, antioxidant and antibacterial effects of the chitosan films dramatically increased after cooperated by nano-ZnO and anthocyanins, which also enhanced with increase of nano-ZnO content, whereas the elongation at break of the composite films decreased. Especially, the anthocyanin and nano-ZnO promoted the antibacterial activity of films synergistically. Composite films made from black wolfberry anthocyanins exhibited higher mechanical performance than those made from purple tomato anthocyanins but weaker antibacterial effects. The purple tomato anthocyanins/chitosan and nano-ZnO/purple tomato anthocyanins/chitosan films effectively reflected pork spoilage, changing their colors from dark green to brown, indicating the potential for applications in active and intelligent food packaging.

Keywords： bio-based     multifunction     colorimetric indicator     active and intelligent packaging    

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A cellphone-based colorimetric multi-channel sensor for water environmental monitoring

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1590-z

Abstract:

● A cellphone-based colorimetric multi-channel sensor for in-field

Keywords： Colorimetric analysis     Multi-channel sensor     Cellphone     Water quality indexes     Environmental monitoring    

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Label-free colorimetric nanosensor with improved sensitivity for Pb

Abdul Ghaffar Memon, Xiaohong Zhou, Yunpeng Xing, Ruoyu Wang, Lanhua Liu, Mohsin Khan, Miao He

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 1, doi: 10.1007/s11783-019-1094-7

Abstract:

• Unmodified-AuNP based, colorimetric nanosensor was constructed

Keywords： Colorimetric nanosensor     Truncated 8–17 DNAzyme     Pb2+ detection     Unmodified AuNPs    

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Midline2 is overexpressed and a prognostic indicator in human breast cancer and promotes breast cancer

Frontiers of Medicine 2021, Volume 15, Issue 6,   Pages 942-942 doi: 10.1007/s11684-021-0876-z

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Biomineralization-inspired copper-cystine nanoleaves capable of laccase-like catalysis for the colorimetric

Miao Guan, Mengfan Wang, Wei Qi, Rongxin Su, Zhimin He

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 310-318 doi: 10.1007/s11705-020-1940-y

Abstract: Finally, this laccase mimic was employed to develop a colorimetric method for epinephrine detection,

Keywords： biomineralization     laccase     L-cystine     colorimetric detection     enzyme mimic    

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Screening of indicator pharmaceuticals and personal care products in landfill leachates: a case study

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1716-y

Abstract:

● A systematic framework was developed to identify i-PPCPs for landfill leachate.

Keywords： Landfill leachates     PPCPs     Indicator     Screening criteria     Source-specificity    

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Investigating the role of exiting vehicles and turn indicator usage in gap acceptance at single-lane

Nathan P. BELZ

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 1,   Pages 8-16 doi: 10.1007/s11709-016-0365-7

Abstract: Results prompt the consideration of more consistent guidance on and enforcement of turn indicator use

Keywords： roundabouts     exiting vehicles     turn indicator use     headways    

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Modeling effects of a tidal barrage on water quality indicator distribution in the Severn Estuary

Guanghai GAO, Roger A. FALCONER, Binliang LIN

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2,   Pages 211-218 doi: 10.1007/s11783-012-0464-1

Abstract: to assess the impacts of proposed Severn Barrage on the hydrodynamic, sediment transport and faecal indicator

Keywords： water quality indicator     Severn Estuary     numerical model     tidal energy    

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A novel flavonol-based colorimetric and turn-on fluorescent probe for rapid determination of hydrazine

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 24-33 doi: 10.1007/s11705-022-2171-1

Abstract: Hydrazine is extremely toxic and causes severe harm to human body. Herein, a novel fluorescent probe 4-oxo-2-styryl-4H-chromen-3-yl thiophene-2-carboxylate (FHT) was synthesized for detecting hydrazine by using natural cinnamaldehyde as starting material. This probe exhibited significantly enhanced fluorescence response towards hydrazine over various common metal ions, anions, and amine compounds. The detection limit of probe FHT for hydrazine was as low as 0.14 μmol·L–1, significantly lower than that of the threshold value of 0.312 μmol·L–1, imposed by the Environmental Protection Agency. Moreover, the proposed probe was able to detect hydrazine within wide pH (5–10) and linear detection ranges (0–110 μmol·L–1). This probe was employed for determining trace hydrazine in different environmental water samples. The probe FHT-loaded filter paper strips were able to conveniently detect hydrazine of low concentration through distinct naked-eye and fluorescent color changes. Importantly, the probe FHT with low cytotoxicity was successfully applied to visualize hydrazine in living Hela cells and zebrafish.

Keywords： cinnamaldehyde     3-hydroxychromone derivative     hydrazine     fluorescent probe    

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Water environment security indicator system for urban water management

Tian HAO, Pengfei DU, Yun GAO

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 678-691 doi: 10.1007/s11783-012-0450-7

Abstract: environment management, a systematic approach, encompassing several steps including establish ideal indicatorand organize discussion workshop, should be followed to establish a comprehensive water environment indicatorrelating to water environment security as well as design an appropriate water environment security indicator

Keywords： water environment security     supervision and management     monitoring parameter     indicator system     Suzhou    

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China’s Agriculture Green Development: from Concept to Actions

Frontiers of Agricultural Science and Engineering doi: 10.15302/J-FASE-2023512

Abstract:

● A target-threshold indicator evaluation system is proposed to measure

Keywords： agricultural transformation     Agriculture Green Development     historical trend     indicator system     theoretical    

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A simple, azulene-based colorimetric probe for the detection of nitrite in water

Lloyd C. Murfin, Carlos M. López-Alled, Adam C. Sedgwick, Jannis Wenk, Tony D. James, Simon E. Lewis

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 1,   Pages 90-96 doi: 10.1007/s11705-019-1790-7

Abstract: We describe the synthesis and evaluation of an azulene-based chemodosimeter for nitrite. The probe was found to undergo two distinct color changes upon introduction aqueous nitrite ion. A near-instant formation of a grey color provides a qualitative indication of the presence of nitrite, followed by the formation of a deep-yellow/orange color, the endpoint from which quantitative data can be derived. The azulene probe exhibits 1:1 stoichiometry of reaction with nitrite in water, and is selective for nitrite over other anions. The azulene probe was applied to determine nitrite content in cured meat, and compared with the British Standard testing procedure (Griess test). The value obtained from the azulene-based probe agreed closely with the standard test. Our procedure only requires the preparation of one standard solution, instead of the three required for the standard Griess test.

Keywords： azulene     nitrite     diazoquinone    

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Midline2 is overexpressed and a prognostic indicator in human breast cancer and promotes breast cancer

Lan Wang,Jueheng Wu,Jie Yuan,Xun Zhu,Hongmei Wu,Mengfeng Li

Frontiers of Medicine 2016, Volume 10, Issue 1,   Pages 41-51 doi: 10.1007/s11684-016-0429-z

Abstract:

Midline2 (MID2) is an ubiquitin-conjugating E2 enzyme linked to tumor progression and a novel interacting partner of breast cancer 1, early-onset (BRCA1). However, the role of MID2 in breast cancer remains unknown. This study investigated the expression, prognostic value, and role of MID2 in breast cancer. The expression of MID2 mRNA and protein was significantly upregulated in breast cancer tissue and established cell lines compared with that in normal breast epithelial cells and paired adjacent non-tumor tissue (P<0.001). Immunohistochemical analysis demonstrated that MID2 was overexpressed in 272 of 284 (95.8%) paraffin-embedded, archived breast cancer tissue. Moreover, MID2 expression increased with advanced clinical stage (P<0.001). High MID2 expression was significantly associated with advanced clinical stages and T, N, and M staging (all P<0.05). Univariate and multivariate analyses indicated that high MID2 expression was an independent prognostic factor for poor overall survival in the entire cohort (93.73 vs. 172.1 months; P<0.001, log-rank test) and in subgroups with stages Tis+ I+ II and III+ IV. Furthermore, 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide colony formation, and anchorage-independent growth ability assays were conducted. Results showed that siRNA silencing of MID2 expression significantly reduced MCF-7 and MDA-MB-231 cell proliferation in vitro and blocked the growth of MDA-MB-231 cell xenograft tumors in vivo (P<0.05). This study indicated that MID2 may be a novel prognostic marker and interventional target in breast cancer.

Keywords： breast cancer     MID2     proliferation     overall survival     xenograft    

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A review of measurement methods for peracetic acid (PAA)

Chen Cheng, Haodong Li, Jinling Wang, Hualin Wang, Xuejing Yang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 5, doi: 10.1007/s11783-020-1266-5

Abstract: Abstract • Physical and chemical properties and application of peracetic acid solution. • Determination method of high concentration peracetic acid. • Determination method of residual peracetic acid (low concentration). Peroxyacetic acid has been widely used in food, medical, and synthetic chemical fields for the past several decades. Recently, peroxyacetic acid has gradually become an effective alternative disinfectant in wastewater disinfection and has strong redox capacity for removing micro-pollutants from drinking water. However, commercial peroxyacetic acid solutions are primarily multi-component mixtures of peroxyacetic acid, acetic acid, hydrogen peroxide, and water. During the process of water treatment, peroxyacetic acid and hydrogen peroxide (H2O2) often coexist, which limits further investigation on the properties of peroxyacetic acid. Therefore, analytical methods need to achieve a certain level of selectivity, particularly when peroxyacetic acid and hydrogen peroxide coexist. This review summarizes the measurement and detection methods of peroxyacetic acid, comparing the principle, adaptability, and relative merits of these methods.

Keywords： Peroxyacetic acid     Measurement methods     Titration     Colorimetric     Chromatography     NMR    

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Nonlinear dynamic behavior of rotating blade with breathing crack

Laihao YANG, Zhu MAO, Shuming WU, Xuefeng CHEN, Ruqiang YAN

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 196-220 doi: 10.1007/s11465-020-0609-z

Abstract: dynamic behavior of rotating cracked blade is then investigated with NRCBM, and the nonlinear damage indicatorThe results show that NDI is a distinguishable indicator for the severity level estimation of the crackindicators for diagnosing the crack existence, and the third-order super-harmonic resonances can serve as an indicator

Keywords： rotating blade     breathing crack     nonlinear vibration     nonlinear damage indicator    

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Title Author Date Type Operation

Anthocyanins/chitosan films doped by nano zinc oxide for active and intelligent packaging: comparison of anthocyanins source from purple tomato or black wolfberry

Journal Article

A cellphone-based colorimetric multi-channel sensor for water environmental monitoring

Journal Article

Label-free colorimetric nanosensor with improved sensitivity for Pb

Abdul Ghaffar Memon, Xiaohong Zhou, Yunpeng Xing, Ruoyu Wang, Lanhua Liu, Mohsin Khan, Miao He

Journal Article

Midline2 is overexpressed and a prognostic indicator in human breast cancer and promotes breast cancer

Journal Article

Biomineralization-inspired copper-cystine nanoleaves capable of laccase-like catalysis for the colorimetric

Miao Guan, Mengfan Wang, Wei Qi, Rongxin Su, Zhimin He

Journal Article

Screening of indicator pharmaceuticals and personal care products in landfill leachates: a case study

Journal Article

Investigating the role of exiting vehicles and turn indicator usage in gap acceptance at single-lane

Nathan P. BELZ

Journal Article

Modeling effects of a tidal barrage on water quality indicator distribution in the Severn Estuary

Guanghai GAO, Roger A. FALCONER, Binliang LIN

Journal Article

A novel flavonol-based colorimetric and turn-on fluorescent probe for rapid determination of hydrazine

Journal Article

Water environment security indicator system for urban water management

Tian HAO, Pengfei DU, Yun GAO

Journal Article

China’s Agriculture Green Development: from Concept to Actions

Journal Article

A simple, azulene-based colorimetric probe for the detection of nitrite in water

Lloyd C. Murfin, Carlos M. López-Alled, Adam C. Sedgwick, Jannis Wenk, Tony D. James, Simon E. Lewis

Journal Article

Midline2 is overexpressed and a prognostic indicator in human breast cancer and promotes breast cancer

Lan Wang,Jueheng Wu,Jie Yuan,Xun Zhu,Hongmei Wu,Mengfeng Li

Journal Article

A review of measurement methods for peracetic acid (PAA)

Chen Cheng, Haodong Li, Jinling Wang, Hualin Wang, Xuejing Yang

Journal Article

Nonlinear dynamic behavior of rotating blade with breathing crack

Laihao YANG, Zhu MAO, Shuming WU, Xuefeng CHEN, Ruqiang YAN

Journal Article