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  1. Article ; Online: Enhanced up-conversion luminescence and temperature-sensing of GdVO

    Li, Yue / Guo, Linna / Yang, Bowen

    Dalton transactions (Cambridge, England : 2003)

    2021  Volume 50, Issue 6, Page(s) 2112–2122

    Abstract: There exists a tendency in the research of up-conversion materials to shift the excitation from 980 nm to multiple excitation wavelengths. A series of GdVO4:Ln3+ with similar sizes and irregular prism morphology were successfully prepared by a co- ... ...

    Abstract There exists a tendency in the research of up-conversion materials to shift the excitation from 980 nm to multiple excitation wavelengths. A series of GdVO4:Ln3+ with similar sizes and irregular prism morphology were successfully prepared by a co-precipitation technique. A wide multi-color emission corresponding to different Ln3+ doping was also obtained under single excitation. It is worth pointing out that among all the studied samples, only the emission intensity of GdVO4:Yb3+/Er3+ excited at two-wavelengths (980 nm + 1550 nm) simultaneously was enhanced by a factor of 1.87, compared to the sum of emission intensities excited at two single-wavelengths separately. Moreover, to further enhance the up-conversion luminescence intensity, cation ions (Lu3+/Y3+) and anion ions (PO43-) were also doped into the host, and the luminous intensity was also improved to a certain extent. A possible mechanism for energy transfer and possible transitions were also suggested and discussed in detail using an energy level diagram. In addition, not only a high record value of Sa (0.0069 K-1) but also a high Sr (1.13% K-1) is achieved for GdVO4:Yb3+/Er3+ in the physiological temperature range (273-453 K). Combining a much intensified dual-wavelength up-conversion signal and good temperature-sensing properties, this work can be extended to the surges of other lanthanide ion doped systems pumped by using multiple-wavelength lasers, and can also open new possibilities for up-conversion color displays and anti-counterfeiting applications.
    Language English
    Publishing date 2021-01-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d0dt04159a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: An electrochemical sensor based on MOF-derived porous carbon/graphene composite for sensitive determination of carbendazim.

    Guo, Linna / Zhao, Bin / Hao, Lin / Zhang, Yufan / Wang, Chun

    Mikrochimica acta

    2022  Volume 189, Issue 12, Page(s) 454

    Abstract: A sensitive electrochemical sensor for the determination of carbendazim (CBZ) was developed with Ni-doping nanoporous carbon-graphene composite (G-Ni/C) as the electrode material. The combination of graphene and Ni-doping nanoporous carbon not only ... ...

    Abstract A sensitive electrochemical sensor for the determination of carbendazim (CBZ) was developed with Ni-doping nanoporous carbon-graphene composite (G-Ni/C) as the electrode material. The combination of graphene and Ni-doping nanoporous carbon not only prevented the aggregation of graphene, but also improved electric conductivity and substantially enhanced the electro catalytic activity for CBZ sensing. The electrochemical characterization of G-Ni/C towards CBZ determination was conducted by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) . The sensor based on G-Ni/C/GCE exhibits good electroanalytical activity towards the electro-oxidation of CBZ at the potential of + 0.6 V vs Ag/AgCl. Some key factors including sample pH, scan rates, accumulation potential, and accumulation time were investigated. The method offered a wide linear range of 0.04 to 10.0 µM with a detection limit of 8.9 nM. The obtained sensor was successfully employed for the determination of CBZ in pond water and juice samples with RSD < 5.7% and recoveries in the range 91.3-111%. In the present work, Ni-doping nanoporous carbon-graphene composite (G-Ni/C) was prepared by directly pyrolysis of GO/Ni-MOF. The electrochemical sensor based on G-Ni/C /GCE was applied for sensitive determination of carbendazim (CBZ) in pond water, peach, and lemon juices samples.
    MeSH term(s) Graphite/chemistry ; Carbon/chemistry ; Electrochemical Techniques/methods ; Porosity ; Water
    Chemical Substances Graphite (7782-42-5) ; Carbon (7440-44-0) ; carbendazim (H75J14AA89) ; Water (059QF0KO0R)
    Language English
    Publishing date 2022-11-22
    Publishing country Austria
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 89-9
    ISSN 1436-5073 ; 0026-3672
    ISSN (online) 1436-5073
    ISSN 0026-3672
    DOI 10.1007/s00604-022-05526-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Preparation of hypercrosslinked porous polymer with manifold functional groups for sensitive determination of phenylurea herbicides in beverages and celtuce samples.

    Guo, Linna / Tian, Miao / Li, Zhi / Wang, Qianqian / Wu, Qiuhua / Hao, Lin / Wang, Chun

    Food chemistry

    2023  Volume 427, Page(s) 136674

    Abstract: Wide use of phenylurea herbicide has caused serious residue problem and threaten human health. It is important to develop viable method for their sensitive determination. Herein, a multi-functionalized porous polymer was prepared by crosslinking ... ...

    Abstract Wide use of phenylurea herbicide has caused serious residue problem and threaten human health. It is important to develop viable method for their sensitive determination. Herein, a multi-functionalized porous polymer was prepared by crosslinking hexafluorobisphenol A with pyromellitic dianhydride. Using the multi-functionalized porous polymer as solid phase extraction sorbent, combined with high performance liquid chromatography, a sensitive method was established for determining phenylurea herbicides in beverages and celtuces. High sensitivity was achieved, with method detection limit (S/N = 3) of 0.01---0.025 ng mL
    MeSH term(s) Humans ; Polymers/chemistry ; Herbicides/analysis ; Porosity ; Beverages/analysis ; Solid Phase Extraction/methods ; Chromatography, High Pressure Liquid/methods ; Adsorption ; Limit of Detection
    Chemical Substances Polymers ; Herbicides
    Language English
    Publishing date 2023-06-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 243123-3
    ISSN 1873-7072 ; 0308-8146
    ISSN (online) 1873-7072
    ISSN 0308-8146
    DOI 10.1016/j.foodchem.2023.136674
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Exploring the rumen microbiota of Hu lambs in response to diet with paper mulberry.

    Xiong, Yi / Wang, Xin / Li, Xiaomei / Guo, Linna / Yang, Fuyu / Ni, Kuikui

    Applied microbiology and biotechnology

    2023  Volume 107, Issue 15, Page(s) 4961–4971

    Abstract: Paper mulberry (Broussonetia papyrifera), as a new woody forage with high-protein characteristic, is being widely used in ruminant feeding. However, little is known about the comprehensive microbiota picture of whole ruminal niches (liquid, solid, and ... ...

    Abstract Paper mulberry (Broussonetia papyrifera), as a new woody forage with high-protein characteristic, is being widely used in ruminant feeding. However, little is known about the comprehensive microbiota picture of whole ruminal niches (liquid, solid, and epithelium) under paper mulberry diet. To gain a better understanding of feeding paper mulberry on the rumen microbiota, the effects of fresh paper mulberry, paper mulberry silage, or a conventional high-protein alfalfa silage on rumen fermentation products and microbiota in rumen niches of Hu lambs were studied. Forty-five Hu lambs were randomly divided into 3 treatments with 15 replicates in each treatment. No significant difference was observed among treatments in the average daily gain (ADG). The fresh paper mulberry treatment had lower (P < 0.05) pH and higher (P < 0.05) total volatile fatty acids (TVFA) compared with silage treatments, but the fermentation parameters did not show significant differences between paper mulberry silage and alfalfa silage treatments. The Shannon index did not show a significant difference (P < 0.05) among treatments except between fresh paper mulberry and alfalfa silage treatment in rumen epithelial niches. Butyrivibrio and Treponema were the predominant genera in the rumen epithelial fraction, while Prevotella and Rikenellaceae_RC9 dominated in both rumen liquid and solid fractions. These results indicated the paper mulberry supplement did not have distinct impact on the microbial diversity and growth performance compared with alfalfa silage, especially for paper mulberry silage, which might help us develop an alternative animal feeding strategy of replacing alfalfa with paper mulberry. KEY POINTS: • Feeding paper mulberry silage did not show significant impact on the growth performance compared with alfalfa silage treatment. • Feeding fresh paper mulberry reduced rumen pH value and increased total volatile fatty acid. • The microbial diversity did not show significant difference among treatments.
    MeSH term(s) Female ; Animals ; Sheep ; Morus ; Milk ; Lactation ; Rumen/metabolism ; Broussonetia ; Diet/veterinary ; Silage ; Animal Feed/analysis ; Fatty Acids, Volatile/metabolism ; Microbiota ; Fermentation ; Medicago sativa
    Chemical Substances Fatty Acids, Volatile
    Language English
    Publishing date 2023-06-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 392453-1
    ISSN 1432-0614 ; 0171-1741 ; 0175-7598
    ISSN (online) 1432-0614
    ISSN 0171-1741 ; 0175-7598
    DOI 10.1007/s00253-023-12614-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Attachment and Osteogenic Potential of Dental Pulp Stem Cells on Non-Thermal Plasma and UV Light Treated Titanium, Zirconia and Modified PEEK Surfaces.

    Guo, Linna / Zou, Ziang / Smeets, Ralf / Kluwe, Lan / Hartjen, Philip / Gosau, Martin / Henningsen, Anders

    Materials (Basel, Switzerland)

    2022  Volume 15, Issue 6

    Abstract: Ultraviolet (UV) light and non-thermal plasma (NTP) treatment are chairside methods that can efficiently improve the biological aging of implant material surfaces caused by customary storage. However, the behaviors of stem cells on these treated surfaces ...

    Abstract Ultraviolet (UV) light and non-thermal plasma (NTP) treatment are chairside methods that can efficiently improve the biological aging of implant material surfaces caused by customary storage. However, the behaviors of stem cells on these treated surfaces of the implant are still unclear. This study aimed to investigate the effects of UV light and NTP treated surfaces of titanium, zirconia and modified polyetheretherketone (PEEK, BioHPP) on the attachment and osteogenic potential of human dental pulp stem cells (DPSCs) in vitro. Machined disks were treated using UV light and argon or oxygen NTP for 12 min each. Untreated disks were set as controls. DPSCs were cultured from the wisdom teeth of adults that gave informed consent. After 24 h of incubation, the attachment and viability of cells on surfaces were assessed. Cells were further osteogenically induced, alkaline phosphatase (ALP) activity was detected via a p-Nitrophenyl phosphate assay (day 14 and 21) and mineralization degree was measured using a Calcium Assay kit (day 21). UV light and NTP treated titanium, zirconia and BioHPP surfaces improved the early attachment and viability of DPSCs. ALP activity and mineralization degree of osteoinductive DPSCs were significantly increased on UV light and NTP treated surfaces of titanium, zirconia and also oxygen plasma treated Bio-HPP (p < 0.05). In conclusion, UV light and NTP treatments may improve the attachment of DPSCs on titanium, zirconia and BioHPP surfaces. Osteogenic differentiation of DPSCs can be enhanced on UV light and NTP treated surfaces of titanium and zirconia, as well as on oxygen plasma treated Bio-HPP.
    Language English
    Publishing date 2022-03-17
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma15062225
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Osseointegration of titanium implants after surface treatment with ultraviolet light or cold atmospheric plasma in vivo.

    Henningsen, Anders / Precht, Clarissa / Karnatz, Nadia / Bibiza, Eric / Yan, Ming / Guo, Linna / Gosau, Martin / Smeets, Ralf

    International journal of oral implantology (Berlin, Germany)

    2023  Volume 16, Issue 3, Page(s) 197–208

    Abstract: Purpose: To determine the histological effects of ultraviolet light and cold atmospheric plasma treatment on the osseointegration of titanium implants in vivo.: Materials and methods: Six juvenile pigs were divided into three groups of two animals ... ...

    Abstract Purpose: To determine the histological effects of ultraviolet light and cold atmospheric plasma treatment on the osseointegration of titanium implants in vivo.
    Materials and methods: Six juvenile pigs were divided into three groups of two animals each. A total of 54 titanium implants were placed randomly in the pigs' calvarial bone (nine implants per pig). Of these, 18 implants served as untreated controls. The remaining 36 implants served as the experimental group and were treated with either ultraviolet light or argon plasma for 12 minutes each prior to insertion. Two pigs in each group were kept until 2, 4 and 8 weeks and then sacrificed. Resonance frequency analysis was conducted after implant placement and at the time of sacrifice. Osseointegration was evaluated using microcomputed tomography scans and histomorphometrical analysis.
    Results: After initial loss, all implants showed a constant increase in implant stability quotient values over time without significant differences between the groups. The bone-implant contact values increased steadily for all implants over 8 weeks of healing. Surface-treated implants showed significantly higher bone-implant contact values compared to untreated implants at each time point. Bone area fraction occupancy values were almost always higher following both treatment methods; however, differences were only significant after 4 and 8 weeks for the cold atmospheric plasma group and after 4 weeks for the ultraviolet light group.
    Conclusions: Ultraviolet light and cold atmospheric plasma may improve histomorphometrical osseointegration of titanium implants significantly.
    MeSH term(s) Swine ; Animals ; Osseointegration ; Dental Implants ; Titanium ; Plasma Gases/pharmacology ; Ultraviolet Rays ; X-Ray Microtomography ; Surface Properties
    Chemical Substances Dental Implants ; Titanium (D1JT611TNE) ; Plasma Gases
    Language English
    Publishing date 2023-09-28
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2968002-5
    ISSN 2631-6439 ; 2631-6420
    ISSN (online) 2631-6439
    ISSN 2631-6420
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Design of hydroxyl-functionalized nanoporous organic polymer with tunable hydrophilic-hydrophobic surface for solid phase extraction of neonicotinoid insecticides.

    Guo, Linna / Zhao, Bin / Wang, Lijuan / Wang, Qianqian / Yangjuan, An / Hao, Lin / Liu, Weihua / Wang, Zhi / Wu, Qiuhua / Wang, Chun

    Talanta

    2023  Volume 258, Page(s) 124441

    Abstract: As being widely used insecticides, neonicotinoid residues are toxic and harmful to human health and aquatic ecosystems. Thus, the sensitive monitoring of neonicotinoids in water and food samples is highly desirable to reduce their risks to humans. Herein, ...

    Abstract As being widely used insecticides, neonicotinoid residues are toxic and harmful to human health and aquatic ecosystems. Thus, the sensitive monitoring of neonicotinoids in water and food samples is highly desirable to reduce their risks to humans. Herein, four novel hydroxyl-functionalized nanoporous organic frameworks (OH-NOP1, OH-NOP2, OH-NOP3 and OH-NOP4) with tunable hydrophilic-hydrophobic surface have been designed and fabricated for the first time by employing luteolin as monomer and 4,4'-bis(chloromethyl)-1,1'-biphenyl as crosslinker at the molar ratio of 3:1, 1:1, 1:3 and 1:6, respectively. When the molar ratio of luteolin to crosslinker was 1:3, OH-NOP3 was obtained and it presented the highest affinity with excellent adsorption performance towards the studied neonicotinoids. The adsorption mechanism was proposed to be the strong hydrogen bond, polar interaction, Lewis acid-base interaction and pore adsorption between OH-NOP3 and neonicotinoids. Then, utilizing OH-NOP3 as sorbent for solid phase extraction cartridges, an effective method for extraction and preconcentration of neonicotinoids followed by high performance liquid chromatography analysis has been developed for quantitative detection of neonicotinoids from water and edible fungi. The method provided good linearity over the range of 0.06-100.0 ng mL
    Language English
    Publishing date 2023-03-21
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1500969-5
    ISSN 1873-3573 ; 0039-9140
    ISSN (online) 1873-3573
    ISSN 0039-9140
    DOI 10.1016/j.talanta.2023.124441
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Electrocatalytic Synthesis of Pyridine Oximes using in Situ Generated NH

    Xiang, Runan / Wang, Shihan / Liao, Peisen / Xie, Fangyan / Kang, Jiawei / Li, Suisheng / Xian, Jiahui / Guo, Linna / Li, Guangqin

    Angewandte Chemie (International ed. in English)

    2023  Volume 62, Issue 45, Page(s) e202312239

    Abstract: Pyridine oximes produced from aldehyde or ketone with hydroxylamine ( ... ...

    Abstract Pyridine oximes produced from aldehyde or ketone with hydroxylamine (NH
    Language English
    Publishing date 2023-09-27
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202312239
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  9. Article: Gold-Catalyzed Formal Hexadehydro-Diels–Alder/Carboalkoxylation Reaction Cascades

    Wang, Hong-Fa / Guo, Lin-Na / Fan, Zhi-Bo / Tang, Tian-Hua / Zi, Weiwei

    Organic letters. 2021 Mar. 15, v. 23, no. 7

    2021  

    Abstract: A dual gold-catalyzed hexadehydro-Diels–Alder/carboalkoxylation cascade reaction is reported. In this transformation, the gold catalyst participated in the hexadehydro-Diels–Alder step, switching the mechanism from a radical type to a cationic one, and ... ...

    Abstract A dual gold-catalyzed hexadehydro-Diels–Alder/carboalkoxylation cascade reaction is reported. In this transformation, the gold catalyst participated in the hexadehydro-Diels–Alder step, switching the mechanism from a radical type to a cationic one, and then the catalyst activated the resulting aryne to form an ortho-Au phenyl cation species, which underwent a carboalkoxylation rearrangement rather than the expected aryne–ene reaction.
    Keywords catalysts ; cations ; gold
    Language English
    Dates of publication 2021-0315
    Size p. 2676-2681.
    Publishing place American Chemical Society
    Document type Article
    Note NAL-AP-2-clean
    ISSN 1523-7052
    DOI 10.1021/acs.orglett.1c00581
    Database NAL-Catalogue (AGRICOLA)

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  10. Article: Metal-organic framework precursors derived Ni-doping porous carbon spheres for sensitive electrochemical detection of acetaminophen

    Guo, Linna / Hao, Lin / Zhang, Yufan / Yang, Xiumin / Wang, Qianqian / Wang, Zhi / Wang, Chun

    Talanta. 2021 June 01, v. 228

    2021  

    Abstract: The sensitive and selective determination of acetaminophen (AP) in the human body is highly desirable to ensure human health. In this work, nickel-doping nanoporous carbon (Ni/C) was fabricated by directly calcining Ni based metal-organic framework (Ni- ... ...

    Abstract The sensitive and selective determination of acetaminophen (AP) in the human body is highly desirable to ensure human health. In this work, nickel-doping nanoporous carbon (Ni/C) was fabricated by directly calcining Ni based metal-organic framework (Ni-MOF). The Ni/C based electrochemical sensor was developed for sensitive and selective determination of AP in human blood serum and urine samples. The prepared Ni/C composite possess plentiful catalytic active sites, ordered mesoporous structure and large specific surface area, which endow the constructed Ni/C sensor with a prominent performance for acetaminophen sensing. Under the optimal conditions, the developed method offered good linearity in the range of 0.20–53.75 μM with a low detection limit (S/N = 3) of 4.04 × 10⁻² μM. The electrocatalytic performance of the sensor towards AP was further measured by differential pulse voltammetry and cyclic voltammetry. The results demonstrated that the Ni/C sensor can be feasibly employed for the determination of AP in human blood serum and urine samples with excellent anti-interference stability and good reproducibility. The research reveals a great promising of the Ni/C electrochemical sensor for clinical applications and paves a way for the construction of high-performance electrochemical sensors for AP determination.
    Keywords acetaminophen ; blood serum ; carbon ; coordination polymers ; detection limit ; electrochemistry ; human health ; humans ; nanopores ; porous media ; sensors (equipment) ; surface area ; urine ; voltammetry
    Language English
    Dates of publication 2021-0601
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 1500969-5
    ISSN 1873-3573 ; 0039-9140
    ISSN (online) 1873-3573
    ISSN 0039-9140
    DOI 10.1016/j.talanta.2021.122228
    Database NAL-Catalogue (AGRICOLA)

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