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IET Nanobiotechnology

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https://www.readbyqxmd.com/read/30247143/silver-nanoparticles-biosynthesised-using-centella-asiatica-leaf-extract-apoptosis-induction-in-mcf-7-breast-cancer-cell-line
#1
Shima Edalat Fard, Farzaneh Tafvizi, Maryam Bikhof Torbati
The aim of this study was to green synthesised silver nanoparticles (AgNPs) using Centella asiatica leaf extract and investigate the cytotoxic and apoptosis-inducing effects of these nanoparticles in MCF-7 breast cancer cell line. The characteristics and morphology of the green synthesised AgNPs were evaluated using transmission electron microscopy, scanning electron microscopy, UV-visible spectroscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy. The MTT assay was used to investigate the anti-proliferative activity of biosynthesised nanoparticles in MCF-7 cells...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247142/in-vivo-biosynthesis-and-spatial-distribution-of-ag-nanoparticles-in-maize-zea-mays-l
#2
Xiaoli Tong, Na Guo, Zhiyan Dang, Qingguang Ren, Hao Shen
Nanoparticles (NPs), especially biosynthesised in living plants by absorbing soluble salts and reducing metal ions, are extensively used in various fields. This work aimed at investigating the in vivo biosynthesis of silver NPs (Ag-NPs) in maize and the spatial distribution of the NPs and some important nutrient elements in the plant. The content of silver in plant was examined by inductively coupled plasma-atomic emission spectrometer showing that Ag can be absorbed by plant as soluble salts. The NPs in different parts of maize plant were detected and analysed by transmission electron microscopy, demonstrating the synthesis of NPs and their transport from the root to the shoots...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247141/bio-fabrication-of-silver-nanoparticles-by-pseudomonas-aeruginosa-optimisation-and-antibacterial-activity-against-selected-waterborne-human-pathogens
#3
Deepanshu Bhatt, Ena Gupta, Sanket Kaushik, Vijay Kumar Srivastava, Juhi Saxena, Anupam Jyoti
Multiple drug resistance and treatment of contaminated water has become a serious issue in past years. Silver nanoparticles (AgNPs), being bactericidal, non-toxic, cheap and environment friendly behaviour, have drawn attention to overcome these problems. This study has been designed to synthesise AgNPs from Pseudomonas aeruginosa . AgNPs formation was confirmed by colour change and UV-vis spectroscopy. Furthermore, Fourier transform infrared spectroscopy peaks demonstrated the presence of capped proteins as reducing and stabilising agent...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247140/efficacy-of-using-oxygen-microbubble-device-for-facultative-anaerobe-removal
#4
Pei-Ju Lin, Ming-Chuen Chuang, Szu-Chung Chang
Patients with serious gingivitis or periodontal diseases suffer from receding gums. Brushing teeth with a toothbrush may result in bleeding gums and new wounds, which increases the difficulty of removing facultative anaerobes from gum pockets, to decrease the damage inflicted on gums, this study proposed a cleaning device that can generate and emit oxygen microbubbles for eliminating facultative anaerobes in the mouth cavity. In this study, the authors conducted simulations with a denture to investigate the efficacy of using this method to remove facultative anaerobes...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247139/low-temperature-synthesis-of-hierarchical-structures-of-copper-oxide-and-their-superior-biological-activity
#5
Sania Naz, Javeed Akhtar, Muhammad Fayyaz Chaudhary, Muhammad Zia
In this work, the authors report a facile low-temperature wet-chemical route to prepare morphology-tailored hierarchical structures (HS) of copper oxide. The preparation of copper oxide collides was carried out using varying concentrations of copper acetate and a reducing agent at a constant temperature of 50°C. The prepared HS of CuO were characterised by powdered X-rays diffraction that indicates phase pure having monoclinic structures. The morphology was further confirmed by field-emission scanning electron microscope...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247138/the-use-of-slow-releasing-nanoparticle-encapsulated-azadirachtin-formulations-for-the-management-of-caryedon-serratus-o-groundnut-bruchid
#6
Manjunath Jenne, Manjula Kambham, N V K V Prasad Tollamadugu, Hari Prasad Karanam, Murali Krishna Tirupati, Ravindra Reddy Balam, Syed Shameer, Muralidhar Yagireddy
Nanobiotechnology is one of the emerging fields and its interventions in agriculture is been attracting the scientific community. Herein, the authors first to report on control of groundnut bruchid ( Caryedon serratus O.) using nanoscale zinc oxide (ZnONPs) particles and nanoscale chitosan (CNPs) particles-based Azadirachtin formulations. ZnONPs and CNPs were prepared using sol-gel and ion tropic gelation techniques, respectively. Neem seed kernel extract (NSKE) 5% and Neem oil (3000 and 1000 ppm) were encapsulated using the prepared nanoscale materials and characterised using the techniques such as dynamic light scattering, high-resolution transmission electron microscopy...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247137/surface-characterisation-and-reaction-kinetics-of-silver-nanoparticles-mediated-by-the-leaf-and-flower-extracts-of-french-marigold-tagetes-patula
#7
Elias E Elemike, Damian C Onwudiwe, Olusegun K Abiola, Kenneth A Ibe
In this study, French marigold's leaf and flower were used for the synthesis of silver nanoparticles (SNPs) in order to explore their potentials towards bioreduction of Ag+ to Agᵒ. The as-synthesised SNPs were characterised using UV-Vis spectroscopy, Fourier transform infrared (FTIR) spectroscopy, powder X-ray diffraction, transmission electron microscopy, and zeta-potential analysis. The results obtained showed that the particles are polydispersed with sizes in the range 15.8-42.8 nm. The bioreduction was believed to be due to the amides, aldehyde functional groups, and essential oils present in the extracts as confirmed by the FTIR analysis...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247136/comparative-study-on-nanostructured-order-disorder-in-the-wing-eyespots-of-the-giant-owl-butterfly-caligo-memnon
#8
Juliet Sackey, Serge Berthier, Malik Maaza, Thomas Beuvier, Alain Gibaud
A characteristic feature of the giant owl butterfly, i.e. Caligo memnon , is its big wing eyespot. This feature could serve as deceiving functionality for the butterfly against predators. As evidenced by scanning electron microscope (SEM) image on black part of eyespot, the scales on wing eyespot contain nanostructured ridges and cross-ribs. Applying direct measurement, statistical method, and Fourier analysis, the authors evidence that these nanostructures display order-disorder in their shape and position...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247135/preparation-of-alginate-oligosaccharide-nanoliposomes-and-an-analysis-of-their-inhibitory-effects-on-caco-2-cells
#9
Zhuanzhuan Zhang, Xianjun Dai
The conditions were optimised for preparing Alginate oligosaccharide (AOS) nanoliposomes, and Caco-2 cell experiments were carried out to examine their antitumour effects. The optimal formulation of AOS nanoliposomes was as follows: a phosphatidylcholine-to-cholesterol ratio of 5.12, AOS concentration of 8.44 mg/mL, Tween 80 concentration of 1.11%, and organic phase to aqueous phase ratio of 5.25. Under the above conditions, the experimental encapsulation efficiency was 65.84%, and the AOS nanoliposomes exhibited a small particle size of 323 nm...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247134/biosynthesis-of-waste-pistachio-shell-supported-silver-nanoparticles-for-the-catalytic-reduction-processes
#10
Maryam Bordbar, Nafiseh Mortazavimanesh
Silver nanoparticles (NPs) are immobilised on pistachio shell surface by Cichorium intybus L. leaves extract as an antioxidant media. The Fourier transform infrared spectra, X-ray diffraction, field-emission scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy, and transmission electron microscope analyses confirmed the support of silver NPs on the pistachio shell (Ag NPs/pistachio shell). Ag NPs on the pistachio shell had a diameter basically in the 10-15 nm range. Reduction reactions of 4-nitrophenol (4-NP), and organic dyes at ambient condition were used in the investigation of the catalytic performance of the prepared catalyst...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247133/green-biosynthesis-characterisation-and-antimicrobial-activities-of-silver-nanoparticles-using-fruit-extract-of-solanum-viarum
#11
Aayushi Biswas, Chhangte Vanlalveni, Partha Pradip Adhikari, Ralte Lalfakzuala, Lalthazuala Rokhum
Green synthesis of nanoparticles is considered an efficient method when compared with chemical and physical methods because of its bulk production, eco-friendliness and low cost norms. The present study reports, for the first time, green synthesis of silver nanoparticles (AgNPs) at room temperature using Solanum viarum fruit extract. The visual appearance of brownish colour with an absorption band at 450 nm, as detected by ultraviolet-visible spectrophotometer analysis, confirmed the formation of AgNPs. X-ray diffraction confirmed the AgNPs to be crystalline with a face-centred lattice...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247132/effect-of-silver-nanoparticles-and-silver-nitrate-on-growth-of-rice-under-biotic-stress
#12
Muhammad Ejaz, Naveed Iqbal Raja, Zia-Ur-Rehman Mashwani, Muhammad Sheeraz Ahmad, Mubashir Hussain, Muhammad Iqbal
This study was organised to check the effect of silver nanoparticles and silver nitrate on rice growth against biotic stress. Silver nanoparticles were synthesised by using plant extract as reducing agent, followed by characterisation through UV Vis spectroscopy, XRD, EDS and SEM. Aspergillus application significantly reduced rice plant fresh mass (0.9%), dry mass (0.21%), root length (2.3%), shoot length (5.2%) and root number (1%) in comparison to control. Similarly, leaf area, leaf fresh mass, dry mass and leaf number were also reduced by 23...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247131/role-of-agnps-in-the-enhancement-of-seed-germination-and-its-effect-on-plumule-and-radicle-length-of-pennisetum-glaucum
#13
Shital Vishnu Sable, Suvidya Ranade, Satyawati Joshi
The authors have investigated beneficial effects of 1 mM of silver nanoparticles (AgNPs) on agriculturally important plant Pennisetum glaucum (Bajara). The extracellular AgNPs were synthesised using Bacillus subtilis spizizenni and characterised using ultraviolet-visible absorption spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM). Optical absorption spectrum showed characteristic peak of AgNPs at 423 nm. FT-IR analysis of AgNPs showed peak at 3435 cm-1 , which indicates the presence of N-H group (primary, secondary amines and amides) on the surface of AgNPs...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247130/cu-induced-assembly-of-methanobactin-modified-gold-nanoparticles-and-its-peroxidase-mimic-activity
#14
Xin Jia-Ying, Li Chun-Yu, Zhang Shuai, Wang Yan, Zhang Wei, Xia Chun-Gu
Methanobactin (Mb) is a small copper-chelating molecule that functions as an agent for copper acquisition, uptake and copper-containing methane monooxygenase catalysis in methane-oxidising bacteria. The UV-visible spectral and fluorescence spectral suggested that Mb/Cu coordination complex as a monomer (Mb-Cu), dimmer (Mb2 -Cu) and tetramer (Mb4 -Cu) could be obtained at different ratios of Mb to Cu (II). The kinetics of the oxidation of hydroquinone with hydrogen peroxide catalysed by the different Mb/Cu coordination complex were investigated...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247129/facile-synthesis-of-gold-nanoparticles-using-carbon-dots-for-electrochemical-detection-of-neurotransmitter-dopamine-in-human-serum-and-as-a-chemocatalyst-for-nitroaromatic-reduction
#15
Palathedath Suresh Kumar, Sengan Megarajan, Gajjala Rajendra Kumar Reddy, Veerappan Anbazhagan
Herein, the authors reported a carbon dots mediated synthesis of gold nanoparticles (AuNPs) at room temperature. Transmission electron microscopy revealed that the AuNPs are spherical in shape with a size of 10 nm. As-prepared AuNPs was immobilised on carbon paste electrode and subjected to electrochemical sensing of an important neurotransmitter dopamine. Differential pulse voltammetry studies revealed sensitive and selective determination of dopamine in the presence of commonly interfering ascorbic acid and uric acid...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247128/microwave-mediated-synthesis-of-zinc-oxide-nanoparticles-a-therapeutic-approach-against-malassezia-species
#16
Shrestha Roy Goswami, Mukesh Singh
A successful protocol was developed to aid in the reduction in dandruff-causing fungi, namely Malassezia globasa and Malassezia furfur . Both the species were isolated from volunteers aged between 20 and 22 suffering from dandruff, cultured ex vivo, and tested against the presence of synthesised zinc oxide nanoparticles (ZnNP). Direct microscopy, scanning electron microscopy (SEM), and biochemical assays specific to Malassezia species were conducted to identify dandruff-causing fungal species. Microwave-mediated synthesis of ZnNP was performed and characterised by UV-vis, X-ray diffraction, and SEM...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247127/synthesis-and-characterisation-of-nanostructured-hardystonite-coating-on-stainless-steel-for-biomedical-application
#17
Iman Bagherpour, Seyed Morteza Naghib, Amir Hossein Yaghtin
Here, nanostructured hardystonite bioceramic (Ca2 ZnSi2 O7 ) was synthesised from tetraethyl orthosilicate, zinc nitrate hexahydrate, and calcium nitrate tetrahydrate via sol-gel method, dried at 60-120°C, and finally calcinated at 1300°C. X-ray diffraction (XRD) analysis confirmed the formation of hardystonite bioceramic. Afterwards, electrophoretic method was utilised to coat the hardystonite ceramic on 316L stainless steel (SS). Methanol solution was used as suspension solvent. The best deposition procedure was carried out by electrophoretic device in the voltage of 50 V for 5 min...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247126/aqueous-extract-of-broccoli-mediated-synthesis-of-cao-nanoparticles-and-its-application-in-the-photocatalytic-degradation-of-bromocrescol-green
#18
Jejenija Osuntokun, Damian C Onwudiwe, Eno E Ebenso
CaO nanoparticles have been prepared using CaCl2 and aqueous extract of broccoli as a precursor and reducing agent, respectively. Different volumes of the aqueous broccoli extract were utilised to obtain Ca(OH)2 and subsequent calcination gave CaO nanoparticles. The synthesised CaO was confirmed by powder X-ray diffraction (XRD). The morphology was studied using transmittance electron microscopy (TEM), and the surface composition of Ca(OH)2 was explored using Fourier transform infrared spectroscopy. The major functional groups present in the capping material responsible for the reduction of the metal salt and the surface passivation of Ca(OH)2 were identified...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247125/biosynthesis-of-bimetallic-and-core-shell-nanoparticles-their-biomedical-applications-a-review
#19
REVIEW
Mehrdad Khatami, Hajar Q Alijani, Iraj Sharifi
Recently, researchers succeeded in designing and manufacturing a new class of nanoparticles (NPs) called hybrid NPs. Among hybrid NPs, bimetallic and core-shell NPs were a revolutionary step in NPs science. A large number of green physiochemical and methods for nanostructures synthesis have been published. Eventually, physiochemical methods are either expensive or require the use of chemical compounds for the synthesis of bimetallic and core-shell nanostructures. The main challenges that scientists are facing are making the process cheaper, facile and eco-friendly efficient synthesis process...
October 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/30247124/plant-based-metallic-nanoparticles-as-potential-theranostics-agents-bioinspired-tool-for-imaging-and-treatment
#20
REVIEW
Adila Nazli, Muhammad Waleed Baig, Muhammad Zia, Muhammad Ali, Zabta Khan Shinwari, Ihsan Ul Haq
Theranostic approach provides us a platform where diagnosis and treatment can be carried out simultaneously. Biosynthesis of theranostic-capable nanoparticles (NPs) can be carried out by phytoconstituents present inside the plants that can act as capping as well as stabilising agents by offering several advantages over chemical and physical methods. This article highlights the theranostic role of NPs with emphasis on potential of plants to produce these NPs through ecofriendly approach that is called 'Green synthesis'...
October 2018: IET Nanobiotechnology
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