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Search for "high-performance liquid chromatography" in Full Text gives 33 result(s) in Beilstein Journal of Nanotechnology.

Simultaneous electrochemical determination of uric acid and hypoxanthine at a TiO2/graphene quantum dot-modified electrode

  • Vu Ngoc Hoang,
  • Dang Thi Ngoc Hoa,
  • Nguyen Quang Man,
  • Le Vu Truong Son,
  • Le Van Thanh Son,
  • Vo Thang Nguyen,
  • Le Thi Hong Phong,
  • Ly Hoang Diem,
  • Kieu Chan Ly,
  • Ho Sy Thang and
  • Dinh Quang Khieu

Beilstein J. Nanotechnol. 2024, 15, 719–732, doi:10.3762/bjnano.15.60

Graphical Abstract
  • URI, associated with the risk of gout [5]. Hence, simple and selective methods to determine the purine content in food and dietary products are of interest among researchers [6][7]. At the present time, several techniques for the determination of URI and HYP are available, such as high-performance
  • liquid chromatography [8], liquid chromatography–tandem mass spectrometry [9], and gas chromatography/mass spectrometry [10]. These approaches require complex handling procedures. Electrochemical techniques have been considered as a robust alternative for URI and HYP sensing because of their simplicity
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Published 20 Jun 2024

Development and characterization of potential larvicidal nanoemulsions against Aedes aegypti

  • Jonatas L. Duarte,
  • Leonardo Delello Di Filippo,
  • Anna Eliza Maciel de Faria Mota Oliveira,
  • Rafael Miguel Sábio,
  • Gabriel Davi Marena,
  • Tais Maria Bauab,
  • Cristiane Duque,
  • Vincent Corbel and
  • Marlus Chorilli

Beilstein J. Nanotechnol. 2024, 15, 104–114, doi:10.3762/bjnano.15.10

Graphical Abstract
  • the release of cymene and myrcene from the nanoemulsions was performed at specific time intervals: 30 min and 1, 2, 4, 6, 8, 12, and 24 h. Each measurement was repeated six times to ensure reliability. The released compounds were quantified by high-performance liquid chromatography, following a
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Published 18 Jan 2024

Nanostructured lipid carriers containing benznidazole: physicochemical, biopharmaceutical and cellular in vitro studies

  • Giuliana Muraca,
  • María Esperanza Ruiz,
  • Rocío C. Gambaro,
  • Sebastián Scioli-Montoto,
  • María Laura Sbaraglini,
  • Gisel Padula,
  • José Sebastián Cisneros,
  • Cecilia Yamil Chain,
  • Vera A. Álvarez,
  • Cristián Huck-Iriart,
  • Guillermo R. Castro,
  • María Belén Piñero,
  • Matias Ildebrando Marchetto,
  • Catalina Alba Soto,
  • Germán A. Islan and
  • Alan Talevi

Beilstein J. Nanotechnol. 2023, 14, 804–818, doi:10.3762/bjnano.14.66

Graphical Abstract
  • was estimated by performing a high-performance liquid chromatography (HPLC) analysis of the filtrate. Considering the initial amount of BNZ added to the formulation, the EE% was calculated as follows: where M0 is the initial amount of BNZ added to the formulation, Cfree is the drug concentration of
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Published 28 Jul 2023

Metal-organic framework-based nanomaterials as opto-electrochemical sensors for the detection of antibiotics and hormones: A review

  • Akeem Adeyemi Oladipo,
  • Saba Derakhshan Oskouei and
  • Mustafa Gazi

Beilstein J. Nanotechnol. 2023, 14, 631–673, doi:10.3762/bjnano.14.52

Graphical Abstract
  • spectrometry (LC–MS), high-performance liquid chromatography (HPLC), and gas chromatography coupled with mass spectrometry (GC–MS) have demonstrated greater selectivity and lower variability when compared to immunoassays for the measurement of antibiotics and steroid hormones in various complex samples [22][23
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Published 01 Jun 2023

Non-stoichiometric magnetite as catalyst for the photocatalytic degradation of phenol and 2,6-dibromo-4-methylphenol – a new approach in water treatment

  • Joanna Kisała,
  • Anna Tomaszewska and
  • Przemysław Kolek

Beilstein J. Nanotechnol. 2022, 13, 1531–1540, doi:10.3762/bjnano.13.126

Graphical Abstract
  • up to 1h). The organic compound concentrations were evaluated by using HPLC. Analysis Changes in phenol concentration were determined by a high-performance liquid chromatography system (Shimadzu, Japan) equipped with a UV detector (SPD-10AV) and a C18 column (Knauer 250 × 4.6 mm, Eurospher II 100-5
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Published 15 Dec 2022

Design of surface nanostructures for chirality sensing based on quartz crystal microbalance

  • Yinglin Ma,
  • Xiangyun Xiao and
  • Qingmin Ji

Beilstein J. Nanotechnol. 2022, 13, 1201–1219, doi:10.3762/bjnano.13.100

Graphical Abstract
  • resonance [10], Fourier transform infrared spectrometry (FTIR) [11], UV–vis absorption spectrometry [12], mass spectrometry (MS) [13], titration microcalorimetry [14], high-performance liquid chromatography (HPLC) [15], gas chromatography (GC), capillary electrophoresis (CE) [16], and electrochemical chiral
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Published 27 Oct 2022

Ethosomal (−)-epigallocatechin-3-gallate as a novel approach to enhance antioxidant, anti-collagenase and anti-elastase effects

  • Çiğdem Yücel,
  • Gökçe Şeker Karatoprak,
  • Sena Yalçıntaş and
  • Tuğba Eren Böncü

Beilstein J. Nanotechnol. 2022, 13, 491–502, doi:10.3762/bjnano.13.41

Graphical Abstract
  • liquid chromatography assay For the quantitative determination of EGCG, the optimal wavelength of 292 nm was used. The calibration curve obtained from high-performance liquid chromatography (HPLC) was linear between 15.625 to 1000 µg/mL with a high correlation coefficient (y = 1.0548x + 4.7737, r2
  • activity of the active compound with appropriate formulations and determining its inhibitory effects on elastase and collagenase enzymes, which accelerate the aging process in the skin, and our findings provide a novel and important contribution to the literature. Results and Discussion High-performance
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Published 31 May 2022

Engineered superparamagnetic iron oxide nanoparticles (SPIONs) for dual-modality imaging of intracranial glioblastoma via EGFRvIII targeting

  • Xianping Liu,
  • Chengjuan Du,
  • Haichun Li,
  • Ting Jiang,
  • Zimiao Luo,
  • Zhiqing Pang,
  • Daoying Geng and
  • Jun Zhang

Beilstein J. Nanotechnol. 2019, 10, 1860–1872, doi:10.3762/bjnano.10.181

Graphical Abstract
  • . To analyze the concentration of peptide in the supernatant, high-performance liquid chromatography (HPLC) (Agilent 1200, USA) was used, where the mixture of solvent A and solvent B (59/41, v/v) was used as the mobile phase. Solvent A was 0.1% trifluoroacetic acid dissolved in deionized water and
  • the NP zeta potential confirmed the successful conjugation of the positive-valued targeting peptide PEPHC1 (Figure 1d). High-performance liquid chromatography (HPLC) determination (results not shown) further supported the successful conjugation of PEPHC1 where the conjugation efficiency of the PEPHC1
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Published 11 Sep 2019

Lipid nanostructures for antioxidant delivery: a comparative preformulation study

  • Elisabetta Esposito,
  • Maddalena Sguizzato,
  • Markus Drechsler,
  • Paolo Mariani,
  • Federica Carducci,
  • Claudio Nastruzzi,
  • Giuseppe Valacchi and
  • Rita Cortesi

Beilstein J. Nanotechnol. 2019, 10, 1789–1801, doi:10.3762/bjnano.10.174

Graphical Abstract
  • and RA content was analyzed after filtration by high-performance liquid chromatography (HPLC) using a Knauer Eurospher II RP C18 column (Knauer, Germany) (15 × 0.4 cm) stainless steel packed with 5 µm particles, eluted at room temperature with different mobile phases. Samples of 50 µL were injected
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Published 29 Aug 2019

Doxorubicin-loaded human serum albumin nanoparticles overcome transporter-mediated drug resistance in drug-adapted cancer cells

  • Hannah Onafuye,
  • Sebastian Pieper,
  • Dennis Mulac,
  • Jindrich Cinatl Jr.,
  • Mark N. Wass,
  • Klaus Langer and
  • Martin Michaelis

Beilstein J. Nanotechnol. 2019, 10, 1707–1715, doi:10.3762/bjnano.10.166

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  • supernatants were collected and the drug content was measured by high-performance liquid chromatography (HPLC) as described below. The loading efficiency of doxorubicin in the nanoparticles was calculated based on the difference between the doxorubicin amount used for nanoparticle preparation and the unbound
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Published 14 Aug 2019

Nanoporous smartPearls for dermal application – Identification of optimal silica types and a scalable production process as prerequisites for marketed products

  • David Hespeler,
  • Sanaa El Nomeiri,
  • Jonas Kaltenbach and
  • Rainer H. Müller

Beilstein J. Nanotechnol. 2019, 10, 1666–1678, doi:10.3762/bjnano.10.162

Graphical Abstract
  • ” (version 2.21). High-performance liquid chromatography (HPLC) measurements of the same samples were performed at 25 °C using a Kontron 400 system (Kontron Instruments GmbH, Germany) equipped with a 20 µL loop and a Eurosper 100-5 C18 column (250 × 4 mm, 5 µm particle size) column. Determination was
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Published 08 Aug 2019

Structural and optical properties of penicillamine-protected gold nanocluster fractions separated by sequential size-selective fractionation

  • Xiupei Yang,
  • Zhengli Yang,
  • Fenglin Tang,
  • Jing Xu,
  • Maoxue Zhang and
  • Martin M. F. Choi

Beilstein J. Nanotechnol. 2019, 10, 955–966, doi:10.3762/bjnano.10.96

Graphical Abstract
  • (CE) and high-performance liquid chromatography (HPLC), this limitation can be overcome to some extent by reducing the surface effects of the separation system. The capacity for each run of these two methods (micrograms for HPLC and nanograms for capillary zone electrophoresis (CZE)) have hindered
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Published 25 Apr 2019

Ag2WO4 nanorods decorated with AgI nanoparticles: Novel and efficient visible-light-driven photocatalysts for the degradation of water pollutants

  • Shijie Li,
  • Shiwei Hu,
  • Wei Jiang,
  • Yanping Liu,
  • Yu Liu,
  • Yingtang Zhou,
  • Liuye Mo and
  • Jianshe Liu

Beilstein J. Nanotechnol. 2018, 9, 1308–1316, doi:10.3762/bjnano.9.123

Graphical Abstract
  • concentrations were monitored by high-performance liquid chromatography (HPLC, Agilent 110 series). The total organic carbon (TOC) experiment was carried out by dispersing 100 mg of 0.3AgI/Ag2WO4 in RhB (50 mg L–1, 100 mL) solution. During the reaction, a 10 mL suspension was sampled every hour and monitored by
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Published 27 Apr 2018

Colloidal solution of silver nanoparticles for label-free colorimetric sensing of ammonia in aqueous solutions

  • Alessandro Buccolieri,
  • Antonio Serra,
  • Gabriele Giancane and
  • Daniela Manno

Beilstein J. Nanotechnol. 2018, 9, 499–507, doi:10.3762/bjnano.9.48

Graphical Abstract
  • analysis [8], gas chromatography [9], immunoassays [10], thin-layer chromatography [11], high-performance liquid chromatography (HPLC) [12] are the main methods used so far for a reliable determination of NH3 levels. However, the above-mentioned techniques have difficulties and disadvantages, such as the
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Published 09 Feb 2018

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO2

  • Patrycja Parnicka,
  • Paweł Mazierski,
  • Tomasz Grzyb,
  • Wojciech Lisowski,
  • Ewa Kowalska,
  • Bunsho Ohtani,
  • Adriana Zaleska-Medynska and
  • Joanna Nadolna

Beilstein J. Nanotechnol. 2018, 9, 447–459, doi:10.3762/bjnano.9.43

Graphical Abstract
  • stripping process). Samples of 0.5 mL reaction mixture were collected after regular time periods during irradiation and filtered through syringe filters (diameter 0.2 μm) to remove the suspended photocatalyst particles. Kinetics of phenol degradation were determined by high-performance liquid chromatography
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Published 06 Feb 2018

Sugarcane juice derived carbon dot–graphitic carbon nitride composites for bisphenol A degradation under sunlight irradiation

  • Lan Ching Sim,
  • Jing Lin Wong,
  • Chen Hong Hak,
  • Jun Yan Tai,
  • Kah Hon Leong and
  • Pichiah Saravanan

Beilstein J. Nanotechnol. 2018, 9, 353–363, doi:10.3762/bjnano.9.35

Graphical Abstract
  • , the solutions were magnetically stirred in the dark for 2 h to establish an adsorption–desorption equilibrium. The residual concentration of BPA was analyzed with a high performance liquid chromatography (HPLC, Flexar, Perkin Elmer) equipped with a UV detector (217 nm). An RS pak DE-413L (250 mm × 4.6
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Published 30 Jan 2018

Review on optofluidic microreactors for artificial photosynthesis

  • Xiaowen Huang,
  • Jianchun Wang,
  • Tenghao Li,
  • Jianmei Wang,
  • Min Xu,
  • Weixing Yu,
  • Abdel El Abed and
  • Xuming Zhang

Beilstein J. Nanotechnol. 2018, 9, 30–41, doi:10.3762/bjnano.9.5

Graphical Abstract
  • chamber [50][95][96][97][98]. Another problem is the lack of an integrated on-chip detection method. After the reaction, the production products should be collected and then analyzed by the bulky, expensive, traditional off-chip equipment, such as a UV–vis spectrometer or high-performance liquid
  • chromatography and gas chromatography mass spectrometer. As demonstrated by our group in a work on microfluidic water purification [99], on-chip detection would make it convenient to monitor the reaction process in real time, to probe the intermediate reactions/productions and to study the reaction kinetics. In
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Published 04 Jan 2018

Evaluation of quantum dot conjugated antibodies for immunofluorescent labelling of cellular targets

  • Jennifer E. Francis,
  • David Mason and
  • Raphaël Lévy

Beilstein J. Nanotechnol. 2017, 8, 1238–1249, doi:10.3762/bjnano.8.125

Graphical Abstract
  • , we have provided our own measurements of Qdot 625 in the Supporting Information File 1. We attempted to measure the size of Qdot 625 using different methods: transmission electron microscopy (TEM), size-exclusion high-performance liquid chromatography (SEC-HPLC), and fluorescence correlation
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Published 09 Jun 2017

High photocatalytic activity of Fe2O3/TiO2 nanocomposites prepared by photodeposition for degradation of 2,4-dichlorophenoxyacetic acid

  • Shu Chin Lee,
  • Hendrik O. Lintang and
  • Leny Yuliati

Beilstein J. Nanotechnol. 2017, 8, 915–926, doi:10.3762/bjnano.8.93

Graphical Abstract
  • determined using a high-performance liquid chromatography instrument (Shimadzu, Prominence LC-20A with Hypersil gold PFP column), which was monitored at a wavelength of 283 nm. The percentage of 2,4-D removal was determined following Equation 3: where Co is the initial concentration of 2,4-D after reaching
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Published 24 Apr 2017

Chitosan-based nanoparticles for improved anticancer efficacy and bioavailability of mifepristone

  • Huijuan Zhang,
  • Fuqiang Wu,
  • Yazhen Li,
  • Xiping Yang,
  • Jiamei Huang,
  • Tingting Lv,
  • Yingying Zhang,
  • Jianzhong Chen,
  • Haijun Chen,
  • Yu Gao,
  • Guannan Liu and
  • Lee Jia

Beilstein J. Nanotechnol. 2016, 7, 1861–1870, doi:10.3762/bjnano.7.178

Graphical Abstract
  • Zeta Potential Analyzer (Microtrac Inc, Montgomeryville, PA). Encapsulation efficiency (EE) and drug loading (DL) capacity The EE and the DL of MIF in the MCNs was analyzed by high performance liquid chromatography (HPLC). Briefly, an accurately weighed quantity of the MCN powder was suspended in a
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Published 28 Nov 2016

Graphene-enhanced plasmonic nanohole arrays for environmental sensing in aqueous samples

  • Christa Genslein,
  • Peter Hausler,
  • Eva-Maria Kirchner,
  • Rudolf Bierl,
  • Antje J. Baeumner and
  • Thomas Hirsch

Beilstein J. Nanotechnol. 2016, 7, 1564–1573, doi:10.3762/bjnano.7.150

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  • is an urgent task. Most widely used techniques are gas chromatography and high performance liquid chromatography coupled with mass spectrometry (GC–MS and HPLC–MS), however often enrichment and extraction steps prior to the analysis are necessary [7]. An online detection system for natural water with
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Published 01 Nov 2016

False positives and false negatives measure less than 0.001% in labeling ssDNA with osmium tetroxide 2,2’-bipyridine

  • Anastassia Kanavarioti

Beilstein J. Nanotechnol. 2016, 7, 1434–1446, doi:10.3762/bjnano.7.135

Graphical Abstract
  • properties of the degradation products via nanopore translocation can be evaluated to assure base calling quality in a DNA sequencing effort. Keywords: α-hemolysin; capillary electrophoresis; DNA sequencing; high-performance liquid chromatography; nanopores; osmium tetroxide bipyridine; osmylated oligos
  • measure of the extent of osmylation and can be obtained spectrophotometrically after purification/removal of the excess label. In the presence of OsBp, the values of R are directly obtained from the DNA peak when the reaction mixture is analyzed and monitored by high performance liquid chromatography
  • (Figure 6). High performance liquid chromatography methods and analyses As a second analytical tool, we used an Agilent 1100/1200 LC HPLC equipped with a binary pump, DAD and a 1290 Infinity Autosampler/Thermostat, and Chemstation software Rev.B.04.01 SP1 for data acquisition and processing. Both the
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Published 12 Oct 2016

Hierarchical coassembly of DNA–triptycene hybrid molecular building blocks and zinc protoporphyrin IX

  • Rina Kumari,
  • Sumit Singh,
  • Mohan Monisha,
  • Sourav Bhowmick,
  • Anindya Roy,
  • Neeladri Das and
  • Prolay Das

Beilstein J. Nanotechnol. 2016, 7, 697–707, doi:10.3762/bjnano.7.62

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  • ′-C12-amine-terminated modified single strand DNA (ssDNA) and its complementary strand. The repeated covalent conjugation of TPA with DNA was confirmed by using denaturing polyacrylamide gel electrophoresis (PAGE), reverse-phase high-performance liquid chromatography (RP-HPLC) and matrix-assisted laser
  • characterized by using denaturing polyacrylamide gel electrophoresis (PAGE), reversed-phase high-performance liquid chromatography (RP-HPLC) and matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) analysis. The assembly of DNA–TPA in the presence and absence of Zn PpIX was characterized by
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Published 12 May 2016

Unraveling the neurotoxicity of titanium dioxide nanoparticles: focusing on molecular mechanisms

  • Bin Song,
  • Yanli Zhang,
  • Jia Liu,
  • Xiaoli Feng,
  • Ting Zhou and
  • Longquan Shao

Beilstein J. Nanotechnol. 2016, 7, 645–654, doi:10.3762/bjnano.7.57

Graphical Abstract
  • associated with poor performance in the Morris water maze test and passive avoidance test [58]. Maternal exposure to TiO2 NPs can also affect the production of dopamine and its metabolites, as determined by high performance liquid chromatography (HPLC) [59], and alter gene expression related to dopamine
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Published 29 Apr 2016

Single pyrimidine discrimination during voltage-driven translocation of osmylated oligodeoxynucleotides via the α-hemolysin nanopore

  • Yun Ding and
  • Anastassia Kanavarioti

Beilstein J. Nanotechnol. 2016, 7, 91–101, doi:10.3762/bjnano.7.11

Graphical Abstract
  • , yields substantial amounts of cross-linking between strands to form a duplex covalently bound, in a parallel manner, like an “H”. We tested this hypothesis by monitoring the OsBp labeling reaction with a 32 nt long deoxyoligo, pGEX3’-dA9 (tail at the 3’-end), by high performance liquid chromatography
  • ) testable. Experimental Part A, Materials, oligos, preparation of osmylated oligos, capillary electophoresis (CE) analysis, and high performance liquid chromatography (HPLC) analysis: HPCE grade solution of 50 mM sodium tetraborate pH 9.3 was purchased from Agilent Technologies. A 4% aqueous osmium
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Published 22 Jan 2016
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