keyword
https://read.qxmd.com/read/38535265/reduction-in-pathogenic-biofilms-by-the-photoactive-composite-of-bacterial-cellulose-and-nanochitosan-dots-under-blue-and-green-light
#1
JOURNAL ARTICLE
Danica Z Zmejkoski, Nemanja M Zdravković, Milica D Budimir Filimonović, Vladimir B Pavlović, Svetlana V Butulija, Dušan D Milivojević, Zoran M Marković, Biljana M Todorović Marković
In this study, nanochitosan dots (ChiDs) were synthesized using gamma rays and encapsulated in bacterial cellulose (BC) polymer matrix for antibiofilm potential in photodynamic therapy. The composites were analyzed for structural changes using SEM, AFM, FTIR, XRD, EPR, and porosity measurements. Additionally, ChiD release was assessed. The results showed that the chemical composition remained unaltered, but ChiD agglomerates embedded in BC changed shape (1.5-2.5 µm). Bacterial cellulose fibers became deformed and interconnected, with increased surface roughness and porosity and decreased crystallinity...
March 14, 2024: Journal of Functional Biomaterials
https://read.qxmd.com/read/38534245/towards-a-self-powered-amperometric-glucose-biosensor-based-on-a-single-enzyme-biofuel-cell
#2
JOURNAL ARTICLE
Asta Kausaite-Minkstimiene, Algimantas Kaminskas, Galina Gayda, Almira Ramanaviciene
This paper describes the study of an amperometric glucose biosensor based on an enzymatic biofuel cell consisting of a bioanode and a biocathode modified with the same enzyme-glucose oxidase (GOx). A graphite rod electrode (GRE) was electrochemically modified with a layer of Prussian blue (PB) nanoparticles embedded in a poly(pyrrole-2-carboxylic acid) (PPCA) shell, and an additional layer of PPCA and was used as the cathode. A GRE modified with a nanocomposite composed of poly(1,10-phenanthroline-5,6-dione) (PPD) and gold nanoparticles (AuNPs) entrapped in a PPCA shell was used as an anode...
March 8, 2024: Biosensors
https://read.qxmd.com/read/38531885/construction-of-active-inert-core-shell-structured-nanocrystals-for-broad-range-multicolor-upconversion-luminescence
#3
JOURNAL ARTICLE
Mengyao Zhu, Zhenhua Li, Xuecheng Li, Xueru Zhang, Yuxiao Wang, Haoyue Hao, Liang Li
Rare earth doped up-conversion luminescent nano-materials exhibit abundant emission colors under suitable excitation condition. In this work, NaYF4 :Er/Ho@NaYF4 and NaYbF4 :Tm@NaYF4 nanoparticles were synthesized by co-precipitation method. The pure red emission can be realized by the designed NaYF4 :Er/Ho@NaYF4 nanocrystals and the R/Gs reach 23.3 and 25 under excitations of 980 and 1550 nm lasers, respectively. The R/G declines as the power increasing with the emission color changing from red to yellow, which is due to the quick saturation of the energy levels, radiating red emissions...
March 26, 2024: Scientific Reports
https://read.qxmd.com/read/38529192/brucine-entrapped-titanium-oxide-nanoparticle-for-anticancer-treatment-an-in-vitro-study
#4
JOURNAL ARTICLE
Rashed M Almuqbil
Backgroundand Objective . The public's health has been seriously threatened by cervical cancer during recent times. In terms of newly diagnosed cases worldwide, it ranks as the ninth most prevalent malignancy. Multiple investigations have proven that nanoparticles can effectively combat cancer due to their small dimensions and extensive surface area. In the meantime, bioactive compounds which are biocompatible are being loaded onto nanoparticles to promote cancer therapy. The current study investigates the anticancerous potential of Brucine-entrapped titanium oxide nanoparticles (TiO2 NPs) in cervical cancer cell line (HeLa)...
2024: Advances in pharmacological and pharmaceutical sciences
https://read.qxmd.com/read/38528435/inorganic-organic-hybrid-layered-semiconductor-agseph-quasi-solution-synthesis-optical-properties-and-thermolysis-behavior
#5
JOURNAL ARTICLE
Kewei Gu, Tingting Wang, Guowei Yang, Nan Yu, Chengchao Du, Junli Wang
Two-dimensional inorganic-organic hybrid layered semiconductors are actively studied because of their naturally formed multiquantum well (MQW) structures and associated optical, photoelectric, and quantum optics characteristics. Silver benzeneselenolate (AgSePh, Ph = C6 H5 ) is a new member of such hybrid layered materials, but has not fully been exploited. Herein, we present a quasi-solution method to prepare high quality free-standing AgSePh flake-like microcrystals by reacting diphenyl diselenide (Ph2 Se2 ) with silver nanoparticles...
March 25, 2024: Inorganic Chemistry
https://read.qxmd.com/read/38527359/a-novel-sonoelectrochemical-approach-for-preparing-of-zno-nanoparticles
#6
JOURNAL ARTICLE
Pham Huong Quynh, Hoang Minh Trang, Nguyen Thanh Trung, Nguyen Nang Dinh, Dang Van Thanh, Le Phuoc Anh, Nguyen Thi Luyen, Nguyen Thi Khanh Van
A novel, rapid, and facile method for one-step sonoelectrochemical synthesis of zinc oxide nanoparticles (UEZ) was introduced in this study. The optimum operating parameters have been selected at a voltage of 7.5 V, KCl concentration of 0.5 M, and the reaction time of 60 min. The as-prepared UEZ were characterized by XRD, SEM, and HRTEM. It was found that the UEZ has a hexagonal wurtzite structure with high crystalline quality, good purity, a size range of 30-100 nm, and good photocatalytic degradation of methylene blue...
March 25, 2024: Nanotechnology
https://read.qxmd.com/read/38526617/catharanthus-roseus-assisted-bio-fabricated-zinc-oxide-nanoparticles-for-promising-antibacterial-potential-against-klebsiella-pneumoniae
#7
JOURNAL ARTICLE
Sumreen Sultana, Bagepalli Shivaram Ashwini, Mohammad Azam Ansari, Mohammad N Alomary, Yahya F Jamous, Tekupalli Ravikiran, Siddapura Ramachandrappa Niranjana, M Yasmin Begum, Ayesha Siddiqua, Thimappa Ramachandrappa Lakshmeesha
This study emphasized on the synthesis of zinc oxide nanoparticles (ZnO NPs) in an environmentally friendly manner from the extract of Catharanthus roseus leaves and its antibacterial assessment against the pneumonia-causing pathogen Klebsiella pneumoniae. This simple and convenient phytosynthesis approach is found to be beneficial over conventional methods, wherein plants serve as excellent reducing, capping, and stabilizing agents that enables the formation of ZnO NPs without the use of harmful chemicals...
March 25, 2024: Bioprocess and Biosystems Engineering
https://read.qxmd.com/read/38523600/homogeneous-and-nanogranular-prussian-blue-to-enable-long-term-stable-electrochromic-devices
#8
JOURNAL ARTICLE
Xiaofang Fu, Kun Li, Chengli Zhang, Qiang Wang, Guanglong Xu, Alexander Alexandrovich Rogachev, Maxim Anatolievich Yarmolenko, Hongtao Cao, Hongliang Zhang
The increasing demand for the state-of-the-art electrochromic devices has received great interest in synthesizing Prussian blue (PB) nanoparticles with a uniform diameter that exhibit excellent electrochromism, electrochemistry, and cyclability. Herein, we report the controllable synthesis of sub-100 nm PB nanoparticles via the coprecipitation method. The diameter of PB nanoparticles can be modulated by adjusting the reactant concentration, the selection of a chelator, and their purification. The self-assembled nanogranular thin films, homogeneously fabricated by using optimized PB nanoparticles with an average diameter of 50 nm as building blocks via the blade coating technique enable excellent performance with a large optical modulation of 80% and a high coloration efficiency of 417...
March 25, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38523523/a-new-approach-in-the-early-electrochemical-diagnosis-of-hepatitis-b-virus-infection-using-carbon-based-nanomaterials
#9
JOURNAL ARTICLE
Navid Omidifar, Reza Masoumzadeh, Seyyed Amirreza Saghi, Ali Nikmanesh, Mansoureh Shokripour, Seyyed Mojtaba Mousavi, Yousef Nikmanesh, Ahmad Gholami
The importance of early diagnosis of hepatitis B virus infection to treat and follow up this disease has led to many advances in diagnostic techniques and materials. Conventional diagnostic tests are not very useful, especially in the early stages of infection; it is therefore suggested that nanomaterials can enhance them by changing and strengthening their performance for a more accurate and rapid diagnosis. Electrochemical immunosensors with unique features such as miniaturization, low cost, specificity, and simplicity have become a convenient and vital tool in the rapid diagnosis of hepatitis B...
March 22, 2024: Recent Patents on Nanotechnology
https://read.qxmd.com/read/38523139/highly-efficient-catalytic-degradation-of-organic-dyes-using-iron-nanoparticles-synthesized-with-vernonia-amygdalina-leaf-extract
#10
JOURNAL ARTICLE
Yohannes Shuka Jara, Tilahun Tumiso Mekiso, Alemayhu Pawulos Washe
Today, nanoscience explores the potential of nanoparticles due to their extraordinary properties compared to bulk materials. The synthesis of metal nanoparticles using plant extracts is a very promising method for environmental remediation, which gets global attention due to pollution-led global warming. In the present study, iron nanoparticles (FeNPs) were successfully synthesized by the green method using Vernonia amygdalina plant leaf extract as a natural reducing and capping agent. Biosynthesized FeNPs were characterized with different analytical techniques such as UV-visible, FT-IR, XRD, and SEM...
March 24, 2024: Scientific Reports
https://read.qxmd.com/read/38522674/prediction-and-optimizing-of-methylene-blue-sequestration-to-activated-charcoal-magnetic-nanocomposites-using-artificial-neutral-network-and-response-surface-methodology
#11
JOURNAL ARTICLE
Uyiosa Osagie Aigbe, Thabang Calvin Lebepe, Oluwatobi Samuel Oluwafemi, Otolorin Adelaja Osibote
Green synthesized magnetic nanoparticles (MNPs) linked with activated charcoal (AC) (AC/Fe3 O4 NCs) were exploited for methylene blue (MB) confiscation in this study. The AC/Fe3 O4 NCs produced were characterized using TEM, FTIR, UV/Vis and XRD spectrometry. The Response-Surface-Methodology (RSM) was utilized to improve the experimental data for the MB sorption to AC/Fe3 O4 NCs, with 20 experimental runs implemented through a central composite design (CCD) to assess the effect of sorption factors-initial MB concentration, pH and sorbent dosage effects on the response (removal-effectiveness)...
March 22, 2024: Chemosphere
https://read.qxmd.com/read/38521328/alkaline-protease-functionalized-hydrothermal-synthesis-of-novel-gold-nanoparticles-alps-aunps-a-new-entry-in-photocatalytic-and-biological-applications
#12
JOURNAL ARTICLE
Khalil Ur Rahman, Umber Zaman, Ahmad Alem, Dilfaraz Khan, Noor Saeed Khattak, Mohammed Alissa, Ghfren S Aloraini, Ehab A Abdelrahman, Meshari A Alsuwat, Khalid J Alzahrani, Mazen Almehmadi, Mamdouh Allahyani
Researchers are consistently investigating novel and distinctive methods and materials that are compatible for human life and environmental conditions This study aimed to synthesize gold nanoparticles (ALPs-AuNPs) using for the first time an alkaline protease (ALPs) derived from Phalaris minor seed extract. A series of physicochemical techniques were used to inquire the formation, size, shape and crystalline nature of ALPs-AuNPs. The nanoparticles' ability to degrade methylene blue (MB) through photocatalysis under visible light irradiation was assessed...
March 21, 2024: International Journal of Biological Macromolecules
https://read.qxmd.com/read/38519046/hybrid-hydrogels-for-immunoregulation-and-pro-angiogenesis-through-mild-heat-stimulation-to-accelerate-whole-process-diabetic-wound-healing
#13
JOURNAL ARTICLE
Qianru Guo, Tianyu Yin, Wei Huang, Rui Nan, Tao Xiang, Shaobing Zhou
Intense and persistent oxidative stress, excessive inflammation and impaired angiogenesis severely hinder diabetic wound healing. Bioactive hydrogel dressings with immunoregulatory and pro-angiogenic properties have great promise in treating diabetic wounds. However, the therapeutic effects of dressings always depend on drugs with side effects, expensive cytokines and cell therapies. Herein, a novel dynamic borate-bonds crosslinked hybrid multifunctional hydrogel dressings with photothermal properties are developed to regulate the microenvironment of diabetic wound sites and accelerate the whole process of its healing without additional medication...
March 22, 2024: Advanced Healthcare Materials
https://read.qxmd.com/read/38518913/phytosynthesis-of-zinc-oxide-nanoparticles-for-enhanced-antioxidant-antibacterial-and-photocatalytic-properties-a-greener-approach-to-environmental-sustainability
#14
JOURNAL ARTICLE
Jayaseelan C, Siva D, Kamaraj C, Thirugnanasambandam R, Ganesh Kumar V, Subashni B, Ashokkumar R, Saravanan D
Multifunctional nanoparticle (NP) production from phytochemicals is a sustainable process and an eco-friendly method, and this technique has a variety of uses. To accomplish this, we developed the medicinal plant Tinospora cordifolia (TC) leaf extract-assisted zinc oxide nanoparticles (ZnONPs). Instruments such as UV-Vis, XRD, FTIR, FE-SEM with EDX, and high-resolution TEM were applied to characterize the biosynthesized TC-ZnONPs. According to the UV-vis spectra, the phytogenicall y synthesized TC-ZnONPs absorb at a wavelength centered at 374 nm, which corresponds to a 3...
March 20, 2024: Environmental Research
https://read.qxmd.com/read/38513730/impact-of-conjugation-to-different-lipids-on-the-lymphatic-uptake-and-biodistribution-of-brush-peg-polymers
#15
JOURNAL ARTICLE
Mohammad Abdallah, Lihuan Lin, Ian K Styles, Alexander Mörsdorf, James L Grace, Gracia Gracia, Cornelia B Landersdorfer, Cameron J Nowell, John F Quinn, Michael R Whittaker, Natalie L Trevaskis
Delivery to peripheral lymphatics can be achieved following interstitial administration of nano-sized delivery systems (nanoparticles, liposomes, dendrimers etc) or molecules that hitchhike on endogenous nano-sized carriers (such as albumin). The published work concerning the hitchhiking approach has mostly focussed on the lymphatic uptake of vaccines conjugated directly to albumin binding moieties (ABMs such as lipids, Evans blue dye derivatives or peptides) and their subsequent trafficking into draining lymph nodes...
March 19, 2024: Journal of Controlled Release
https://read.qxmd.com/read/38513277/iron-oxide-nanoparticles-synthesized-using-mentha-spicata-extract-and-evaluation-of-its-antibacterial-cytotoxicity-and-antimigratory-potential-on-highly-metastatic-human-breast-cells
#16
JOURNAL ARTICLE
Huzaifa Umar, Maryam Rabiu Aliyu, Dilber Uzun Ozsahin
Iron oxide nanoparticles (Fe2 O3 NPs) were synthesized utilizing Mentha spicata sourced from Cyprus as a stabilizing agent. The study delved into assessing the antimicrobial, cytotoxic, anti-proliferative, and anti-migratory potential of Fe2 O3 NPs through disc diffusion, trypan blue, and 3-[4, 5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) assay, respectively. Characterization of the synthesized Fe2O3 NPs was conducted using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), UV-vis spectroscopy (UV-vis), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX)...
March 21, 2024: Biomedical Physics & Engineering Express
https://read.qxmd.com/read/38508449/double-balloon-catheter-mediated-transarterial-chemotherapy-delivery-in-a-swine-model-a-mechanism-recruiting-the-vasa-vasorum-for-localized-therapies
#17
JOURNAL ARTICLE
Khashayar Farsad, Paula M Novelli, Christopher Laing, Ripal T Gandhi, Jacob Cynamon, Claudia S López, Erin S Stempinski, Robert Strasser, Ramtin Agah
Treatment of hypovascular tumors, such as pancreatic adenocarcinoma, is challenging due to inefficient drug delivery. This report examines the potential mechanism of localized drug delivery via trans-arterial micro perfusion (TAMP) using a proprietary adjustable double-balloon occlusion catheter in a porcine model. Adult Yorkshire swine (N=21) were used in IACUC-approved protocols. The RC-120 catheter was positioned into visceral, femoral, and pulmonary arteries with infusion of methylene blue dye, gemcitabine, or gold nanoparticles...
March 18, 2024: Journal of Vascular and Interventional Radiology: JVIR
https://read.qxmd.com/read/38503811/antibacterial-and-sunlight-driven-photocatalytic-activity-of-graphene-oxide-conjugated-ceo-2-nanoparticles
#18
JOURNAL ARTICLE
Fauzia, Mo Ahamad Khan, Mohd Chaman, Ameer Azam
This work focuses on the structural, morphological, optical, photocatalytic, antibacterial properties of pure CeO2 nanoparticles (NPs) and graphene oxide (GO) based CeO2 nanocomposites (GO-1/CeO2 , GO-5/CeO2 , GO-10/CeO2 , GO-15/CeO2 ), synthesized using the sol-gel auto-combustion and subsequent sonication method, respectively. The single-phase cubic structure of CeO2 NPs was confirmed by Rietveld refined XRD, HRTEM, FTIR and Raman spectroscopy. The average crystallite size was calculated using Debye Scherrer formula and found to increase from 20 to 25 nm for CeO2 to GO-15/CeO2 samples, respectively...
March 19, 2024: Scientific Reports
https://read.qxmd.com/read/38502359/refining-shape-and-size-of-silver-nanoparticles-using-ion-irradiation-for-enhanced-and-homogeneous-sers-activity
#19
JOURNAL ARTICLE
Laden Sherpa, Arun Nimmala, S V S Nageswara Rao, S A Khan, Anand P Pathak, Ajay Tripathi, Archana Tiwari
We present green synthesis of silver nanoparticles in water using unirradiated and Ag <mml:math xmlns:mml="https://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow/> <mml:mrow><mml:mn>15</mml:mn> <mml:mo>+</mml:mo></mml:mrow> </mml:msup> </mml:math> ion irradiated phytoextracts of Bergenia Ciliata leaf, Eupatorium adenophorum leaf, Rhododendron arboreum leaf and flower. The use of different plant extracts and their subsequent ion irradiation allow for successful refinement of nanoparticle size and morphology...
March 19, 2024: Discov Nano
https://read.qxmd.com/read/38501976/capillary-action-driven-surface-enhanced-raman-spectroscopy-sers-for-the-identification-of-phthalocyanine-blue-in-modern-paintings-based-on-the-bpg-spot-test
#20
JOURNAL ARTICLE
Shao-Chun Hsueh, Ling-Hsuan Wang, Yung-Chen Liao, Hui-Yu Chiang, Cheng-Huang Lin
A method for the extraction and accumulation of Ag nanoparticles utilizing capillary action through a piece of triangular-shaped cotton paper is reported. This method allowed the integration of SERS and the BPG spot test, which are typically employed for examining pigments on paper or in books. Malachite green oxalate was used as the model material for investigating the extent of enhancement when SERS was applied. The dynamic behavior of the Ag nanoparticles was also studied. When the cotton paper was pre-treated with malachite green oxalate, Ag nanoparticles could be extracted and accumulated on the triangular top, resulting in a dramatic SERS improvement...
March 19, 2024: Analytical Methods: Advancing Methods and Applications
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