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Search for "membrane" in Full Text gives 510 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Electrostatic pull-in application in flexible devices: A review

  • Teng Cai,
  • Yuming Fang,
  • Yingli Fang,
  • Ruozhou Li,
  • Ying Yu and
  • Mingyang Huang

Beilstein J. Nanotechnol. 2022, 13, 390–403, doi:10.3762/bjnano.13.32

Graphical Abstract
  • was more than 50 times. The combination of flexible valves and PDMS microchannels optimizes the optical transparency and durability of microvalves. A pneumatically coupled graphene membrane pump was designed by Davidovikj et al. [78], which is selectively permeable to gases in a controllable way, as
  • shown in Figure 9. The dumbbell-shape chamber consists of a narrow trench connecting two circular cavities, both of which are covered by few-layer graphene. Local electrodes at the bottom of each cavity allow to drive each graphene membrane individually, changing the pressure of the chamber through a
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Published 12 Apr 2022

Interfacial nanoarchitectonics for ZIF-8 membranes with enhanced gas separation

  • Season S. Chen,
  • Zhen-Jie Yang,
  • Chia-Hao Chang,
  • Hoong-Uei Koh,
  • Sameerah I. Al-Saeedi,
  • Kuo-Lun Tung and
  • Kevin C.-W. Wu

Beilstein J. Nanotechnol. 2022, 13, 313–324, doi:10.3762/bjnano.13.26

Graphical Abstract
  • methods of MOF membrane preparation require multiple steps and high-pressure conditions. In this study, a reliable one-step interfacial synthesis method under atmospheric pressure has been developed to prepare zeolitic imidazolate framework-8 (ZIF-8) membranes supported on porous α-Al2O3 disks. To obtain
  • natural gas) with high efficiency is needed. Membrane-based separation offers a great potential for online CO2 sequestration in view of its high energy efficiency, small carbon footprint, and competitive cost compared to traditional separation processes, such as distillation and adsorption [5]. The
  • current membrane separation market in chemical engineering is dominated by polymeric membranes because of their low cost, ease of production, and mechanical flexibility [6][7][8][9]. However, applications of polymeric membranes in the separation processes are limited by their short lifetime and inferior
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Published 22 Mar 2022

Engineered titania nanomaterials in advanced clinical applications

  • Padmavati Sahare,
  • Paulina Govea Alvarez,
  • Juan Manual Sanchez Yanez,
  • Gabriel Luna-Bárcenas,
  • Samik Chakraborty,
  • Sujay Paul and
  • Miriam Estevez

Beilstein J. Nanotechnol. 2022, 13, 201–218, doi:10.3762/bjnano.13.15

Graphical Abstract
  • photocatalytic reaction, as a result of which anatase has been found to have the highest antimicrobial activity among all crystal structures of TiO2 [79]. The mechanisms of titania-induced biocidal activity are mostly by an oxidative attack on the outer/inner cell membrane of the microorganism, as well as
  • insertion into the inner membrane, for precise mitochondria-targeted cancer treatment as presented in Figure 8B. The efficiency of G-TiO2−x-TPP was scrutinized in mice having HeLa tumors, and the results showed excellent mitochondria-targeting potential and strong phototherapeutic efficacy under a single
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Published 14 Feb 2022

A comprehensive review on electrospun nanohybrid membranes for wastewater treatment

  • Senuri Kumarage,
  • Imalka Munaweera and
  • Nilwala Kottegoda

Beilstein J. Nanotechnol. 2022, 13, 137–159, doi:10.3762/bjnano.13.10

Graphical Abstract
  • functional specific nanosized additives to be used in various water remediation membrane techniques. The adsorption, filtration, photocatalytic, and bactericidal capabilities of the hybrid membranes in removing common major water pollutants such as metal ions, dyes, oils, and biological pollutants have been
  • discussed. Finally, an outlook on the future research pathways to fill the gaps existing in water remediation have been suggested. Keywords: electrospinning; environmental remediation; membrane technologies; nanohybrids; water purification; Review 1 Introduction Nanotechnology is a technique that exploits
  • fiber functionalization through blending the functionalizing material with the polymer prior to electrospinning, post-spinning surface functionalization, or the use of a coaxial electrospinning setup make electrospinning a superior technique for membrane fabrication [2]. The smaller size endows the
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Published 31 Jan 2022

Bacterial safety study of the production process of hemoglobin-based oxygen carriers

  • Axel Steffen,
  • Yu Xiong,
  • Radostina Georgieva,
  • Ulrich Kalus and
  • Hans Bäumler

Beilstein J. Nanotechnol. 2022, 13, 114–126, doi:10.3762/bjnano.13.8

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  • process for human blood products is so safe that random testing of the products is sufficient. By adopting this principle, each batch is be tested, but not every single product. Endotoxins or the lipopolysaccharide (LPS) of the outer membrane of Gram-negative bacteria is another important point regarding
  • . Especially the chelation of Mg2+ results in a destabilization of the negative charges of the outer membrane of Gram-negative bacteria [45]. The cells thus become permeable. This effect can be exploited to make the cells more receptive to antibiotics, biocides, or other substances [28][52]. Depending on the
  • concentration of EDTA and the bacterial strain, there is a release of membrane components, proteins, and finally cell lysis [53][54][55]. The treatment of Gram-negative cells with EDTA can lead to a release of up to 50% of the LPS from the cell wall of a bacterium [56][57]. These effects have been demonstrated
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Published 24 Jan 2022

Theranostic potential of self-luminescent branched polyethyleneimine-coated superparamagnetic iron oxide nanoparticles

  • Rouhollah Khodadust,
  • Ozlem Unal and
  • Havva Yagci Acar

Beilstein J. Nanotechnol. 2022, 13, 82–95, doi:10.3762/bjnano.13.6

Graphical Abstract
  • agreement with the spectroscopic data (Figure 2b). Cells treated with free bPEI show a very weak optical signal in the cytoplasm, as expected (Figure 4c1–c3). In addition, significant morphological changes were observed in these cells due to the cytotoxic effect of bPEI on the cytoplasmic membrane and the
  • pathways do not necessarily involve traffic to lysosomes, it can yield a better transfection efficiency [65]. Indeed, it was shown that both unmodified branched and linear PEI polyplexes could damage plasma membranes, resulting in a rapid redistribution of phosphatidylserine from the inner plasma membrane
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Published 18 Jan 2022

Nanoscale friction and wear of a polymer coated with graphene

  • Robin Vacher and
  • Astrid S. de Wijn

Beilstein J. Nanotechnol. 2022, 13, 63–73, doi:10.3762/bjnano.13.4

Graphical Abstract
  • external pressure. In the case of the crumpled graphene layer, we see a larger indentation depth compared to the flat graphene layer (Figure 7). The tip has more freedom to sink inside the material when the graphene sheet is crumpled (membrane buckling and elasticity) than in the case of flat graphene
  • (stiff membrane). Figure 8 shows the cross section of the density under the tip at the end of the indentation process. We can see regular lines of high density right below the graphene layer, which indicate a local reorganisation of the polymer chains. The graphene layer, especially the flat sheet, is
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Published 14 Jan 2022

Measurement of polarization effects in dual-phase ceria-based oxygen permeation membranes using Kelvin probe force microscopy

  • Kerstin Neuhaus,
  • Christina Schmidt,
  • Liudmila Fischer,
  • Wilhelm Albert Meulenberg,
  • Ke Ran,
  • Joachim Mayer and
  • Stefan Baumann

Beilstein J. Nanotechnol. 2021, 12, 1380–1391, doi:10.3762/bjnano.12.102

Graphical Abstract
  • permeation membrane, as oxygen sensor material, or for the use in solid oxide fuel cell components [1][5][6]. Apart from this, ceria is also widely employed as a catalyst in the middle- to low-temperature regime (20–400 °C) [7][8][9], making ceria-based dual-phase materials with a second electron-conductive
  • spinel or perovskite phase applicable in membrane reactors for partial oxidation reactions. Dual-phase membranes with FeCo2O4, or its iron-rich pendant Fe2CoO4, and Gd-doped ceria as an ion conductor have already been successfully applied as oxygen permeation membranes with high permeability in the
  • depends on the ceria/spinel ratio, has recently been discussed [16]. Current research efforts are aiming to improve the composition and microstructure of a dual-phase membrane with similar composition for application in a membrane reactor at considerably lower temperatures (below 600 °C) to perform
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Published 15 Dec 2021

Alteration of nanomechanical properties of pancreatic cancer cells through anticancer drug treatment revealed by atomic force microscopy

  • Xiaoteng Liang,
  • Shuai Liu,
  • Xiuchao Wang,
  • Dan Xia and
  • Qiang Li

Beilstein J. Nanotechnol. 2021, 12, 1372–1379, doi:10.3762/bjnano.12.101

Graphical Abstract
  • possibility for the early diagnosis of cancer [7]. In recent decades, anticancer drugs have been developed in great number, enabling the control and treatment of many cancers to improve life quality and life span of people. Many approved anticancer drugs have significant effects on cell membrane proteins and
  • ultrastructure of living cells [15][16], cell membranes, membrane proteins [17][18] and DNA [19], and through recording single molecular force spectra [20][21]. However, the morphology and the nanoscale mechanical properties of malignant pancreatic cancer cells (PCCs) under anticancer drug treatment have not
  • caused by the more complex distribution of biomolecules, such as proteins and sugars, existing on the normal cell membrane surface than that on the cancer cell surface [28][29][30]. The statistics of the Young's modulus values of the four kinds of cells are illustrated in Figure 4a. The Young’s modulus
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Published 14 Dec 2021

Biocompatibility and cytotoxicity in vitro of surface-functionalized drug-loaded spinel ferrite nanoparticles

  • Sadaf Mushtaq,
  • Khuram Shahzad,
  • Tariq Saeed,
  • Anwar Ul-Hamid,
  • Bilal Haider Abbasi,
  • Nafees Ahmad,
  • Waqas Khalid,
  • Muhammad Atif,
  • Zulqurnain Ali and
  • Rashda Abbasi

Beilstein J. Nanotechnol. 2021, 12, 1339–1364, doi:10.3762/bjnano.12.99

Graphical Abstract
  • ). Several studies have indicated that spinel ferrite MFe2O4 (M = Fe, Co, Ni, Zn) NPs cause cytotoxicity via oxidative stress which results in damage to the cell membrane, proteins, and DNA [41][42][43]. However, how NPs are processed inside the cell is also a contributing factor in ROS production [44]. For
  • interaction between NPs a plasma membrane associated proteins [55]. In addition, the charge of polymeric coatings also governs NP uptake by cells. Positively charged polymers have been reported to enhance genotoxicity due to better internalization of NPs via the plasma membrane (electrostatic interaction) and
  • samples were filtered using a 0.2 µm syringe filter and concentrated using centrifugal filters (Amicon Ultra-4). The concentrated samples were purified by using 1% agarose gel at 100 V for 90 min. Discrete NP bands on the gel were cut and extracted using a 50 kDa dialysis membrane (Spectrum Laboratories
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Published 02 Dec 2021

Polarity in cuticular ridge development and insect attachment on leaf surfaces of Schismatoglottis calyptrata (Araceae)

  • Venkata A. Surapaneni,
  • Tobias Aust,
  • Thomas Speck and
  • Marc Thielen

Beilstein J. Nanotechnol. 2021, 12, 1326–1338, doi:10.3762/bjnano.12.98

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  • cuticle is a thin non-cellular membrane that covers most of the above-ground organs of land plants. It is a composite matrix consisting of cutin and cutan as its main components, contains intracuticular waxes, and typically is covered by an outer layer of epicuticular waxes. The cuticle and the underlying
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Published 01 Dec 2021

Electrical, electrochemical and structural studies of a chlorine-derived ionic liquid-based polymer gel electrolyte

  • Ashish Gupta,
  • Amrita Jain,
  • Manju Kumari and
  • Santosh K. Tripathi

Beilstein J. Nanotechnol. 2021, 12, 1252–1261, doi:10.3762/bjnano.12.92

Graphical Abstract
  • . Figure 1a shows the surface morphology of a pure PVdF-HFP film, indicating an uneven and rough surface of the crystalline polymer. Upon the addition of the ionic liquid [BDiMIM][Cl] on PVdF-HFP, the sizes of the grains start decreasing and the membrane becomes flexible and appears as a swollen structure
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Published 18 Nov 2021

A review on slip boundary conditions at the nanoscale: recent development and applications

  • Ruifei Wang,
  • Jin Chai,
  • Bobo Luo,
  • Xiong Liu,
  • Jianting Zhang,
  • Min Wu,
  • Mingdan Wei and
  • Zhuanyue Ma

Beilstein J. Nanotechnol. 2021, 12, 1237–1251, doi:10.3762/bjnano.12.91

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  • superhydrophobic microstructures, and it is found to increase with the increase of the square root of the Reynolds number in the limit of high Re [121]. 3.2 Nanofiltration As shown in Figure 10, electro-osmosis can play an important role in the area of nanofiltration, where membrane fouling is the main drawback
  • through the membrane [123]. Since improving the slip length can enhance the electro-osmotic velocity, the slip length should be taken into consideration when investigating the characteristics of electro-osmosis through membranes. Silkina et al. proposed a model which incorporates hydrodynamic slip and the
  • Beskok compared a slip-modified theoretical model with the molecular dynamics simulation results. They found that the slip enhancement in the electro-osmotic flow is independent of the channel height, which can provide a theoretical basis for membrane fabrication of electrically assisted nanofiltration
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Published 17 Nov 2021

Impact of electron–phonon coupling on electron transport through T-shaped arrangements of quantum dots in the Kondo regime

  • Patryk Florków and
  • Stanisław Lipiński

Beilstein J. Nanotechnol. 2021, 12, 1209–1225, doi:10.3762/bjnano.12.89

Graphical Abstract
  • embedded in a freestanding GaAs/AlGaAs membrane [44][45][46][47][48]. It has been shown that morphology manipulation of semiconductor QDs such as size, shape, strain distribution, or inhomogenities can influence the coupling strength of electron–phonon (e–ph) interactions [49]. The phononic effects appears
  • dots. It was found that transport through electron–phonon cavities with QDs embedded in a freestanding membrane is strongly affected by vibrational degrees of freedom. As model systems we have chosen single (TQD) or double (DTQD) T-shaped arrangements of quantum dots. The first system in the absence of
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Published 12 Nov 2021

The effect of cobalt on morphology, structure, and ORR activity of electrospun carbon fibre mats in aqueous alkaline environments

  • Markus Gehring,
  • Tobias Kutsch,
  • Osmane Camara,
  • Alexandre Merlen,
  • Hermann Tempel,
  • Hans Kungl and
  • Rüdiger-A. Eichel

Beilstein J. Nanotechnol. 2021, 12, 1173–1186, doi:10.3762/bjnano.12.87

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  • cobalt-containing samples and 21 kV for the samples without cobalt additive. The samples were stabilised in air and subsequently carbonised in argon atmosphere for 3 h at temperatures between 600 and 1100 °C. Electrodes were prepared from the carbonised mats by applying a PTFE membrane by means of hot
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Published 19 Oct 2021

Self-assembly of amino acids toward functional biomaterials

  • Huan Ren,
  • Lifang Wu,
  • Lina Tan,
  • Yanni Bao,
  • Yuchen Ma,
  • Yong Jin and
  • Qianli Zou

Beilstein J. Nanotechnol. 2021, 12, 1140–1150, doi:10.3762/bjnano.12.85

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  • membrane and had good biocompatibility. After 20 h of incubation, approximately 95% of Staphylococcus aureus bacterial proliferation was effectively inhibited [46]. A novel supramolecular self-assembled hydrogel was prepared by mixing Fmoc-ʟ-phenylalanine (Fmoc-ʟ-Phe) with oligo(thiophene ethynylene)-ᴅ
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Published 12 Oct 2021

pH-driven enhancement of anti-tubercular drug loading on iron oxide nanoparticles for drug delivery in macrophages

  • Karishma Berta Cotta,
  • Sarika Mehra and
  • Rajdip Bandyopadhyaya

Beilstein J. Nanotechnol. 2021, 12, 1127–1139, doi:10.3762/bjnano.12.84

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  • have also proven to be beneficial in overcoming multidrug resistance by enabling an increased drug uptake [8]. Similarly, physical combination of stabilized IONPs and anti-tuberculosis drugs improve intracellular drug accumulation through efflux pump inhibition [9] or by enhanced membrane
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Published 07 Oct 2021

Use of nanosystems to improve the anticancer effects of curcumin

  • Andrea M. Araya-Sibaja,
  • Norma J. Salazar-López,
  • Krissia Wilhelm Romero,
  • José R. Vega-Baudrit,
  • J. Abraham Domínguez-Avila,
  • Carlos A. Velázquez Contreras,
  • Ramón E. Robles-Zepeda,
  • Mirtha Navarro-Hoyos and
  • Gustavo A. González-Aguilar

Beilstein J. Nanotechnol. 2021, 12, 1047–1062, doi:10.3762/bjnano.12.78

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  • advantages include high biocompatibility, safety, and flexibility (the latter can be modulated by the concentration of cholesterol in the lipid membrane) [40][73][74]. PEGylated long-circulating liposomes with co-encapsulated CUR–doxorubicin inhibited C26 (murine colon carcinoma) cell proliferation, in
  • , and high membrane permeability [80][81][82]. In particular, their stability tends to increase due to minimal exposure to ambient conditions (thereby delaying oxidation or degradation reactions), while their release may be regulated according to the use of different encapsulating materials [83
  • -promoting effect of the phototherapy–CUR combination is the result of increased nuclear fragmentation, nuclear condensation and reactive oxygen species (ROS) generation, loss of mitochondrial membrane potential, increased cytosolic levels of cytochrome C, and regulation of apoptosis-related proteins
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Published 15 Sep 2021

Progress and innovation of nanostructured sulfur cathodes and metal-free anodes for room-temperature Na–S batteries

  • Marina Tabuyo-Martínez,
  • Bernd Wicklein and
  • Pilar Aranda

Beilstein J. Nanotechnol. 2021, 12, 995–1020, doi:10.3762/bjnano.12.75

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  • –Nafion membrane. Using this barrier, the capacity retention could be improved to 250 mAh·g−1 after 100 cycles. In spite of the improvement, the capacity value is still low because of the low Na+ diffusivity through the membrane and the insulating nature of Al2O3. Another approach to stable catholytes is
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Published 09 Sep 2021

Self-assembly of Eucalyptus gunnii wax tubules and pure ß-diketone on HOPG and glass

  • Miriam Anna Huth,
  • Axel Huth and
  • Kerstin Koch

Beilstein J. Nanotechnol. 2021, 12, 939–949, doi:10.3762/bjnano.12.70

Graphical Abstract
  • interface, covers all aerial non-lignified parts of higher plants [1]. It is an extracellular membrane of epidermal cells, consisting of a matrix of the polymer cutin and a mixture of hydrophobic compounds, the cuticular waxes [2][3]. This interface is a multifunctional surface optimized by evolution to
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Published 20 Aug 2021

The role of deep eutectic solvents and carrageenan in synthesizing biocompatible anisotropic metal nanoparticles

  • Nabojit Das,
  • Akash Kumar and
  • Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2021, 12, 924–938, doi:10.3762/bjnano.12.69

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  • maintaining high yield and monodispersity. Initially, gold nanorods were synthesized using electrochemical methods using polycarbonate membrane templates or porous alumina for shape control in the presence of surfactants (mostly CTAB) [34][35]. Because of their optical properties, gold nanorods became
  • adsorbed on the metal surface in a tightly packed bilayer structure. Among quaternary ammonium surfactants, CTAB has been extensively reported as cytotoxic even at low concentrations [44][45][46]. The positively charged CTAB interacts with the plasma membrane, which is negatively charged due to the
  • asymmetric distribution of charged lipids between the two leaflets of the plasma membrane. This lead to a negative charged of the inner leaflet generating a surface potential and the binding affinity towards positively charged moieties. However, an interesting study revealed a structure-dependent
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Published 18 Aug 2021

Modification of a SERS-active Ag surface to promote adsorption of charged analytes: effect of Cu2+ ions

  • Bahdan V. Ranishenka,
  • Andrei Yu. Panarin,
  • Irina A. Chelnokova,
  • Sergei N. Terekhov,
  • Peter Mojzes and
  • Vadim V. Shmanai

Beilstein J. Nanotechnol. 2021, 12, 902–912, doi:10.3762/bjnano.12.67

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  • membrane (cutoff = 12 kDa), branched polyethylenimine (PEI, MW = 25000), polyhexamethylene guanidine hydrochloride (PHMG), analytical grade DMSO, NaI, LiCl, AgNO3, sodium mercaptoethyl sulfonate, mercaptopropionic acid, 2-mercaptoethanol, 2-(dimethylamino)ethanethiol hydrochloride, acetylthiocholine
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Published 16 Aug 2021

Comprehensive review on ultrasound-responsive theranostic nanomaterials: mechanisms, structures and medical applications

  • Sepand Tehrani Fateh,
  • Lida Moradi,
  • Elmira Kohan,
  • Michael R. Hamblin and
  • Amin Shiralizadeh Dezfuli

Beilstein J. Nanotechnol. 2021, 12, 808–862, doi:10.3762/bjnano.12.64

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  • ]. Early reports in the field of ultrasonic drug delivery demonstrated that the application of US energy alone could facilitate intracellular delivery of molecules by altering membrane integrity or interfering with the endocytosis process; however, this could also be harmful to the cells under some
  • the MBs, leading to the term “microstream”. Depending on the US intensity, the oscillating MBs come into close proximity with the cells and induce stresses on the cell membrane [75]. Consequently, the triggered shear forces cause disruption of the cell membrane and increase intracellular uptake of
  • proximity to the cell membrane. It has been shown that during inertial cavitation, in addition to direct oscillating MB–cell membrane interactions, a fluid microjet formed around the MBs can be responsible for providing secondary mechanical stress on the cell membrane and create transient disruption. In
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Published 11 Aug 2021

Silver nanoparticles nucleated in NaOH-treated halloysite: a potential antimicrobial material

  • Yuri B. Matos,
  • Rodrigo S. Romanus,
  • Mattheus Torquato,
  • Edgar H. de Souza,
  • Rodrigo L. Villanova,
  • Marlene Soares and
  • Emilson R. Viana

Beilstein J. Nanotechnol. 2021, 12, 798–807, doi:10.3762/bjnano.12.63

Graphical Abstract
  • cellular membrane and to disrupt internal cellular components, such as DNA [2][3][4][5][6]. Silver nanoparticles (Ag-NPs), in particular, are known for their antimicrobial properties and are one of the most extensively studied inorganic antimicrobial agents [7][8][9]. Early studies suggested that Ag-NPs
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Published 05 Aug 2021

Silver nanoparticles induce the cardiomyogenic differentiation of bone marrow derived mesenchymal stem cells via telomere length extension

  • Khosro Adibkia,
  • Ali Ehsani,
  • Asma Jodaei,
  • Ezzatollah Fathi,
  • Raheleh Farahzadi and
  • Mohammad Barzegar-Jalali

Beilstein J. Nanotechnol. 2021, 12, 786–797, doi:10.3762/bjnano.12.62

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  • each cell protein sample was electrophoresed and transferred to membrane. The membranes were incubated with primary polyclonal antibodies (1:1000) against β-actin (sc-69879), VEGF (sc-7269), C-TnI (sc-133117), VWF (sc-365712), SMA (sc-53015), GATA-4 (sc-25310), TERT (E-AB-33070), cyclin-D (SC-8396
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Published 02 Aug 2021
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