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Balasubramanian B, Raja K, Vignesh Kumar V, Ganeshan P. Characterization study of Holoptelea integrifolia tree bark fibres reinforced epoxy composites. Nat Prod Res 2024; 38:1197-1206. [PMID: 36318867 DOI: 10.1080/14786419.2022.2137505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 10/03/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
This study characterised the composite plate fabricated by epoxy matrix reinforced with alkaline-treated Holoptelea integrifolia tree bark fibre. Tensile and flexural test results clearly show that the mechanical characteristics of pure resin improve in direct proportion to the fibre up to 40%. However, impact test results show that 30% fibre mass ratio composite showed higher mechanical properties. The H. integrifolia fibre composites (HIFC) specimens were also characterised by using Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), Energy dispersive X-ray analysis (EDAX) and thermogravimetric analysis-differential scanning calorimetry (TGA-DSC) analysis. FESEM results show that the bonding between fibre and matrix was excellent. EDAX reveals the elemental proportion of HIFC. O-H, C- H, C-O-C, moisture content and aromatic structure are evident by FTIR spectroscopy. Thermal analysis reveals that the composites degrade rapidly when exposed above 210 °C.
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Affiliation(s)
- B Balasubramanian
- Department of Mechanical Engineering, Chettinad College of Engineering and Technology, Karur, Tamilnadu, India
| | - K Raja
- Department of Mechanical Engineering, University College of Engineering, Dindigul, Tamilnadu, India
| | - V Vignesh Kumar
- Department of Mechanical Engineering, St. Joseph College of Engineering, Chennai, Tamilnadu, India
| | - P Ganeshan
- Department of Mechanical Engineering, Sri Eshwar College of Engineering, Coimbatore, Tamilnadu, India
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Mikhailova TA, Shergina OV. Diversity and negative effect of PM 0.3-10.0 adsorbed by needles of urban trees in Irkutsk, Russia. Environ Sci Pollut Res Int 2023; 30:119243-119259. [PMID: 37924402 DOI: 10.1007/s11356-023-30749-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 10/25/2023] [Indexed: 11/06/2023]
Abstract
The study was performed in natural forests preserved within the Boreal zone city, Irkutsk, Russia. Test sites were selected in the forests in different districts of the city, where samples of Scots pine (Pinus sylvestris L.) and Siberian larch (Larix sibirica Ledeb.) needles were taken to study the adsorption on their surface of aerosol particles of different sizes, in microns: PM0.3, PM0.5, PM1, PM2.5, PM5, PM10. Scanning electron microscopy was used to obtain high-resolution photographs (magnification 800- × 2000, × 16,000) and aerosol particles (particulate matter-PM) were shown to be intensively adsorbed by the surface of needles, with both size and shape of the particles characterized by a wide variety. Pine needles can be covered with particles of solid aerosol by 50-75%, stomata are often completely blocked. Larch needles often show areas, which are completely covered with aerosol particles, there are often found stomata deformed by the penetration of PMx. X-ray spectral microanalysis showed differences in the chemical composition of adsorbed PMx, the particles can be metallic if metals predominate in their composition, carbonaceous-in case of carbon predominance-or polyelemental if the composition is complex and includes significant quantities of other elements besides metals and carbon (calcium, magnesium, potassium, sodium, sulfur, chlorine, fluorine). Since the particles contain a large proportion of technogenic pollutants, accumulation by the needles of some widespread pollutants was investigated. A direct correlation of a highly significant level between the concentration of PMx in the air and the accumulation of many heavy metals in pine and larch needles, as well as sulfur, fluorine, and chlorine, has been revealed, which indicates a high cleaning capacity of urban forests. At the same time, the negative impact of PMx particles on the vital status of trees is great, which shows in intense disturbance of the parameters of photosynthesis and transpiration, leading to a significant decrease in the growth characteristics of trees and reduction in the photosynthetic volume of the crowns. We consider that the results obtained are instrumental in developing an approach to improvement of urban forests status and creating a comfortable urban environment for the population.
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Affiliation(s)
- Tatiana Alekseevna Mikhailova
- Department of Ecology, TheNaturalandAnthropogenicEcosystemsLaboratory, Siberian Institute of Plant Physiology and Biochemistry Siberian Branch of the Russian Academy of Sciences, 132, Lermontova Str., 664033, Irkutsk, Russia
| | - Olga Vladimirovna Shergina
- Department of Ecology, TheNaturalandAnthropogenicEcosystemsLaboratory, Siberian Institute of Plant Physiology and Biochemistry Siberian Branch of the Russian Academy of Sciences, 132, Lermontova Str., 664033, Irkutsk, Russia.
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Ashraf W, Parvez SH, Khanuja M. Synthesis of highly efficient novel two-step spatial 2D photocatalyst material WS 2/ZnIn 2S 4 for degradation/reduction of various toxic pollutants. Environ Res 2023; 236:116715. [PMID: 37481055 DOI: 10.1016/j.envres.2023.116715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 07/10/2023] [Accepted: 07/19/2023] [Indexed: 07/24/2023]
Abstract
In this article, we report the synthesis, characterization of novel biofriendly 2D/2D heterostructure WS2/ZnIn2S4 material in which 2D WS2 nanosheets are uniformly distributed spatially onto the spherically arranged 2D leaves of ZnIn2S4. We then studied the in-depth photocatalytic degradation activity of this novel nanocomposite and its pristine component materials on cationic dye: malachite green, anionic dye: congo red and reduction of heavy metal: chromium(VI) and the degradation efficiency of composite material was also tested on rhodamine-B, methylene blue, methyl orange dyes and acetaminophen/paracetamol drug. Form factor, structure factor and shape factor analysis has been carried out using X-ray diffractometry (XRD). Bond vibrations, functional groups and phonon vibration mode analysis has been done based on Fourier transform infrared (FTIR) spectroscopy and Raman spectroscopy. Morphological and compositional analysis has been done using field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDAX) and X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HR-TEM). Surface area and pore size/distribution was characterized using Brunauer-Emmett-Teller (BET) method and Barrett-Joyner-Halenda Model. Degradation pathways and intermediate products are proposed using the high-performance liquid chromatography (HPLC). Photocatalytic activity of the nanocomposite WS2/ZnIn2S4 is compared with pristine ZnIn2S4 and pristine WS2, which shows more than 50% enhancement in both efficiency and rate of degradation/reduction for all the pollutants. A scavenger study was carried out to get insight of primary and secondary reactive oxygen species (ROS) taking part in degradation. Exciton lifetime, surface charge and stability, and flat band positions were studied based on time-correlated single photon counting (TCSPC) also known as time-resolved photoluminescence (TRPL), zeta potential, and Mott-Schottky respectively. Rate kinetics study was performed to analyze the physical and chemical behaviour of the nanocomposite with pollutants in consideration. Results show ∼100%, ∼90%, and ∼95% degradation efficiency by the heterostructure for malachite green (MG), congo red (CR), and reduction of heavy metal chromium (Cr(VI)) respectively within 5 min, which is a huge improvement as compared to pristine WS2 and pristine ZnIn2S4, both of which show the efficiencies of only ∼25% to∼75% in all the cases.
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Affiliation(s)
- Waseem Ashraf
- Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia, New Delhi, 110025, India.
| | - Syed Hasan Parvez
- Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia, New Delhi, 110025, India
| | - Manika Khanuja
- Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia, New Delhi, 110025, India.
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Velusamy S, Subbaiyan A, Shanmugamoorthy M, Thirumoorthy P. Characterization of solid biomass briquette biofuel from the wastes of Senna auriculata and Ricinus communis using Tapioca starch for sustainable environment. Environ Sci Pollut Res Int 2023; 30:10110-10127. [PMID: 36070038 DOI: 10.1007/s11356-022-22823-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 08/28/2022] [Indexed: 06/15/2023]
Abstract
Biomass energy contributes nearly 14% of the total global energy. Therefore, biomass briquettes can be effectively considered an alternate source of fossil fuels. The present study aims at utilizing Senna auriculata and Ricinus communis waste generated locally for the production of biomass briquettes with 10% of tapioca starch as binder. The biomass wastes are blended at various proportions such as 0:100 (S1), 25:75 (S2), 50:50 (S3), 75:25 (S4) and 100:0 (S5) respectively, and the concentration of binder was maintained to be constant. The characterization of the prepared biomass briquettes includes the analysis of physical characteristics, proximate analysis, elemental analysis, SEM analysis, thermogravimetric analysis, differential scanning calorimetric analysis and XRD analysis. The results of the proximate analysis have revealed that the biomass briquettes possess lower percentage in terms of moisture content, ash content, sensible fixed carbon and high percentage of volatile matter content. Energy dispersive X-ray analysis has shown that the carbon and oxygen are the major elements for all the biomass briquettes. SEM analysis has revealed that the surface of the biomass briquettes is identified with irregular surface, lumps, cavities and few deposits of carbon particles. Thermogravimetric analysis and DSC analysis have reconfirmed the spontaneous burning characteristics of biomass briquettes. XRD analysis has proved that the bonding between each element present in the biomass briquettes is either monoclinic, tetragonal, orthorhombic or anorthic.
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Affiliation(s)
- Sampathkumar Velusamy
- Department of Civil Engineering, Kongu Engineering College, Perundurai, 638060, Tamilnadu, India.
| | - Anandakumar Subbaiyan
- Department of Civil Engineering, Kongu Engineering College, Perundurai, 638060, Tamilnadu, India
| | - Manoj Shanmugamoorthy
- Department of Civil Engineering, Kongu Engineering College, Perundurai, 638060, Tamilnadu, India
| | - Pradeep Thirumoorthy
- Department of Civil Engineering, Kongu Engineering College, Perundurai, 638060, Tamilnadu, India
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Subbaiyan R, Ganesan A, Sasikumar B, Rajendran S, Ramasubramanian B. Synthesis and Characterization of Ferrous and Copper Nanoparticles from E-Waste Using Biological Reduction by Lichen-Associated Bacteria and Their Application in Antifouling Activity. Appl Biochem Biotechnol 2022. [PMID: 36564677 DOI: 10.1007/s12010-022-04293-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/16/2022] [Indexed: 12/25/2022]
Abstract
The largest and fastest growing industry in the world is electronic industries and the generation of waste are emerging problem. Electronic wastes are the source of precious metals that contributes 40 to 50 times more than the ore extracted from mines. The recycling of the waste is very important as it can protect the earth's natural resources. There are various methods for recycling e-waste such as chemical, fire, physical, and mechanical method. Currently, chemical treatment is in practice for recycling but, due to the usage of inorganic chemicals, it gives more environmental issues. Therefore, this paper used the biological method to prepare the nanoparticle from e-waste as it is an eco-friendly method. The copper and ferrous nanoparticle was extracted from the e-waste and biologically reduced using lichen-associated bacterial such as Parmotrema tintorum and P. recticulatum. The characteristics of these nanoparticles such as size, shape, and functional group were analyzed using UV, PSA, SEM, and FTIR respectively. The size of the synthesized particle was in the range of 10-100 nm using PSA. At the 2.5% concentration, the synthesis of ferrous nanoparticles was confirmed by the peak value obtained at 430 nm and 540 nm for copper nanoparticles. The antifouling properties of synthesized nanoparticles were analyzed by colliding them with the paint and applying to the iron surface. In recent research, the nanomaterials were able to use to reduce the fouling activity, also prevent harmful effects to the other marine species and the resistance of some microorganisms to antifoulants. This study helps to prevent environmental contaminants by using the copper and ferrous nanoparticle substances synthesized from the e-waste materials with the help of bacterial reduction.
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Sharifdini M, Heckmann RA, Mikaeili F. The morphological and molecular characterization of Baylisascaris devosi Sprent, 1952 (Ascaridoidea, Nematoda), collected from Pine marten (Martes martes) in Iran. Parasit Vectors 2021; 14:33. [PMID: 33419477 PMCID: PMC7791847 DOI: 10.1186/s13071-020-04513-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 12/01/2020] [Indexed: 11/15/2022] Open
Abstract
Background Baylisascaris devosi is an intestinal nematode found in several carnivores including fisher, wolverine, Beech marten, American marten and sable in different parts of the world, but this nematode has not been reported from Pine marten. Therefore, this study aimed to identify Baylisascaris isolated from a Pine marten in Iran using morphological and molecular approaches. Methods Specimens of B. devosi were collected from one road-killed Pine marten in northern Iran. Morphological features were evaluated using scanning electron microscopy, energy dispersive x-ray analysis and ion sectioning. The molecular characterization was carried out using partial Cox1, LSU rDNA and ITS-rDNA genes. Results The nematodes isolated from the Pine marten were confirmed to be B. devosi based on the morphological features and the sequence of ribosomal and mitochondrial loci. X-ray scans (EDAX) were completed on gallium cut structures (papillae, eggs, male spike and mouth denticles) of B. devosi using a dual-beam scanning electron microscope. The male spike and mouth denticles had a high level of hardening elements (Ca, P, S), helping to explain the chemical nature and morphology of the worm. Based on these genetic marker analyses, our sequence had the greatest similarity with Russian B. devosi isolated from sable. Conclusions In this study, to our knowledge, the occurrence of B. devosi infection in Pine marten is reported for the first time. Molecular analysis showed that these three genes are suitable molecular markers for identification and inferring phylogenetic relationships of Baylisascaris species. Furthermore, the high divergence of Cox1 between Baylisascaris species indicates that Cox1 could be used for their phylogenetic and taxonomic studies. ![]()
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Affiliation(s)
- Meysam Sharifdini
- Department of Medical Parasitology and Mycology, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
| | - Richard A Heckmann
- Department of Biology, Brigham Young University, 1114 MLBM, Provo, Utah, 84602, USA
| | - Fattaneh Mikaeili
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Mazurchevici SN, Mazurchevici AD, Nedelcu D. Dynamical Mechanical and Thermal Analyses of Biodegradable Raw Materials for Additive Manufacturing. Materials (Basel) 2020; 13:E1819. [PMID: 32290591 DOI: 10.3390/ma13081819] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 04/02/2020] [Accepted: 04/10/2020] [Indexed: 12/13/2022]
Abstract
In order to find new ways to ensure sustainable development on a global level, it is essential to combine current top technologies, such as additive manufacturing, with the economic, ecological, and social fields. One objective of this paper refers to wire manufacture such as Arboblend V2 Nature, Arbofill Fichte, and Arboblend V2 Nature reinforced with Extrudr BDP “Pearl” (BDP—Biodegradable Plastic) in order to replace the plastic materials. After wire manufacture by extrusion, the diameter accuracy was analyzed compared with the Fiber Wood wire using SEM analyses and also EDAX—Energy Dispersive X-ray Analysis and DSC—Differential Scanning Calorimetry analyses were done in order to identify their elemental composition and the phase transitions suffered by the materials during heating. Using the samples obtained through the Fused Deposition Modeling (FDM) method, both crystalline phases and chemical composition information (XRD analysis) were identified, as well was determined the visco-elastic behavior Dynamic Mechanical Analysis (DMA), for the reinforced material and Fiber Wood. The extruded wires have allowed size for the printing equipment, around 1.75 mm with tolerance of ± 0.05 mm. The wire material diagrams, Arboblend V2 Nature reinforced with Extrudr BDP “Pearl” and Fiber Wood following the calorimetric analysis, presented peaks corresponding to material crystallization, while Arbofill Fichte revealed only the melting temperature. The storage module was almost double in case of Arboblend V2 Nature reinforced with Extrudr BDP “Pearl” compared with Fiber Wood and materials’ melting temperatures were confirmed by the analyses carried out.
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Heikal YM, Şuţan NA, Rizwan M, Elsayed A. Green synthesized silver nanoparticles induced cytogenotoxic and genotoxic changes in Allium cepa L. varies with nanoparticles doses and duration of exposure. Chemosphere 2020; 243:125430. [PMID: 31995881 DOI: 10.1016/j.chemosphere.2019.125430] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 11/10/2019] [Accepted: 11/19/2019] [Indexed: 05/25/2023]
Abstract
This study aimed to test the ability of aqueous leaf extract of Eichhornia crassipes (Mart.) Solms-Laubach to synthesize silver nanoparticles (AgNPs) and to estimate the cytotoxicity and genotoxicity of AgNPs using Allium cepa assay. Fresh Eichhornia crassipes plants were collected from the Nile River of Egypt. The mixed-shaped structures of the biogenic AgNPs were qualitatively characterized by UV-vis spectroscopy, scanning electron microscopy and transmission electron microscopy. Selected area electron diffraction confirmed the crystalline structure of AgNPs and energy dispersive X-ray analysis clarified the presence of the elemental silver in a percentage of 83.29%. The biogenic AgNPs were quite stable (0.316) and negatively charged (-18.5 mV) based on the polydispersity index values. Allium cepa L. roots were exposed to several AgNPs concentrations (0, 5, 10, 20, 40 and 80 mg L-1) for different time intervals 2, 4 and 6 h. Cytotoxicity measured by both the spectrophotometric and macroscopic techniques recorded the maximum cell death of root tips of A. cepa after 20 mg L-1 treatment. The analysis of comet assay output images showed an alteration of DNA repair kinetics. The use of aqueous leaf extract of E. crassipes (Mart.) Solms-Laubach in the large-scale production of AgNPs by the method proposed in this study may be a step in improving the water loss in the Nile River. At the same time, a sensitive approach to the cytogenotoxicity of AgNPs must be considered.
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Affiliation(s)
- Yasmin M Heikal
- Department of Botany, Faculty of Science, Mansoura University, 35516, Mansoura, Egypt
| | - Nicoleta Anca Şuţan
- University of Piteşti, Faculty of Sciences, Physical Education and Informatics, Department of Natural Sciences, 1 Targu din Vale Str., 110040, Pitesti, Romania
| | - Muhammad Rizwan
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad, Pakistan.
| | - Ashraf Elsayed
- Department of Botany, Faculty of Science, Mansoura University, 35516, Mansoura, Egypt
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Duan X, Liao Y, Liu T, Yang H, Liu Y, Chen Y, Ullah R, Wu T. Zinc oxide nanoparticles synthesized from Cardiospermum halicacabum and its anticancer activity in human melanoma cells (A375) through the modulation of apoptosis pathway. J Photochem Photobiol B 2019; 202:111718. [PMID: 31790883 DOI: 10.1016/j.jphotobiol.2019.111718] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/12/2019] [Accepted: 11/18/2019] [Indexed: 12/25/2022]
Abstract
Metallic nanoparticles were extensively examined to explore their impending exploitations over pharmaceutical purposes. Current work attempting to explores the cytotoxic capacity of zinc oxide (ZnO) nanoparticles besides to human melanoma cell line (A375). Viability of cells was resoluted, and the promising cytotoxicity potential was exhibited by zinc oxide nanoparticles. Cellular adhesion and morphology was determined by propidium iodide assay. Characterization studies like UV-Spectroscopy, X-ray diffraction (XRD) investigation, transmission electron microscope (TEM), energy dispersive X-ray (EDX) Spec, and Fourier transform infrared (FT-IR) examination confirms the accessibility of measurement, form and volume. The mRNA expression of apoptotic genes like caspase 3, 8 and 9 was elevated followed by the exposure to ZnO nanoparticles and it was narrowly proved that ZnO nanoparticles stimulates the apoptotic cell necrosis at the transcriptional stage. Cardiospermum halicacabum down regulated the apoptotic gene expressions. Reactive oxygen species (ROS) accumulation was augmented at concentration reliant mode, that changed normalize numerous indicator pathways and manipulate the kinetic cellular actions. ZnO nanoparticle synthesized Cardiospermum halicacabum might persuades programmed cell necrosis via elevated ROS levels in cells. CH-ZnONPs was further stimulates the markers of apoptosis and aggravates necrosis of cancerous cells, toxicity to cells, and accretion of ROS. With sourced on above whole data, this might accomplished that CH-ZnONPs amalgamated Cardiospermum halicacabum appreciably possessed a toxicity to human melanoma cells (A375) via provoking the apoptotic cell necrosis, entailed feasible efficacy of CH-ZnONPs besides malignancy management.
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Affiliation(s)
- Xi Duan
- Department of Dermatovenereology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, PR China
| | - Yuanyuan Liao
- Department of Neurosurgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, PR China
| | - Ting Liu
- Department of Dermatovenereology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, PR China
| | - Hao Yang
- Department of Dermatovenereology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, PR China
| | - Ying Liu
- Department of Dermatovenereology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, PR China
| | - Yujuan Chen
- Department of Dermatovenereology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, PR China
| | - Riaz Ullah
- Medicinal, Aromatic and Poisonous Plants Research Center (MAPRC), College of Pharmacy, King Saud University, PO box 2457, Riyadh 11451, Saudi Arabia
| | - Tao Wu
- Department of Urology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, PR China.
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Velayutham S, Selvapandiyan M. Effect of yttrium ion on the properties of tri ethyl ammonium picrate single crystals. Heliyon 2019; 5:e02091. [PMID: 31372549 PMCID: PMC6656987 DOI: 10.1016/j.heliyon.2019.e02091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 04/03/2019] [Accepted: 07/12/2019] [Indexed: 11/02/2022] Open
Abstract
Tri Ethyl Ammonium Picrate (TEAP) and Yttrium (Y2+) ions doped single crystals were grown by slow evaporation technique at room temperature. The estimated band gap of the pure TEAP, 0.10 mol % and 0.15 mol % of Y2+ ions doped TEAP are 3.76 eV, 3.82 eV and 3.86 eV. Crystallite size of the grown materials was calculated from powder XRD as 1.456 nm for TEAP, 3.2028 nm for 0.10 mol % of Y2+ ions doped TEAP and 6.934 nm for 0.15 mol % of Y2+ ions doped TEAP single crystals. Y-O stretching mode was assigned by FTIR spectral peak at 549 cm-1. The PL excitation wavelength of the grown materials is 350 nm. The EDAX analysis confirmed by the Carbon, Nitrogen, Oxygen and Yttrium were presented in grown crystals.
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Affiliation(s)
- S Velayutham
- Department of Physics, Periyar University PG Extension Centre, Dharmapuri, 636-701, Tamil Nadu, India
| | - M Selvapandiyan
- Department of Physics, Periyar University PG Extension Centre, Dharmapuri, 636-701, Tamil Nadu, India
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Chowdhury S, Balasubramanian R. Recent advances in the use of graphene-family nanoadsorbents for removal of toxic pollutants from wastewater. Adv Colloid Interface Sci 2014; 204:35-56. [PMID: 24412086 DOI: 10.1016/j.cis.2013.12.005] [Citation(s) in RCA: 367] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 12/15/2013] [Accepted: 12/16/2013] [Indexed: 11/25/2022]
Abstract
Adsorption technology is widely considered as the most promising and robust method of purifying water at low cost and with high-efficiency. Carbon-based materials have been extensively explored for adsorption applications because of their good chemical stability, structural diversity, low density, and suitability for large scale production. Graphene--a single atomic layer of graphite--is the newest member in the family of carbon allotropes and has emerged as the "celeb" material of the 21st century. Since its discovery in 2004 by Novoselov, Geim and co-workers, graphene has attracted increased attention in a wide range of applications due to its unprecedented electrical, mechanical, thermal, optical and transport properties. Graphene's infinitely high surface-to-volume ratio has resulted in a large number of investigations to study its application as a potential adsorbent for water purification. More recently, other graphene related materials such as graphene oxide, reduced graphene oxide, and few-layered graphene oxide sheets, as well as nanocomposites of graphene materials have also emerged as a promising group of adsorbent for the removal of various environmental pollutants from waste effluents. In this review article, we present a synthesis of the current knowledge available on this broad and versatile family of graphene nanomaterials for removal of dyes, potentially toxic elements, phenolic compounds and other organic chemicals from aquatic systems. The challenges involved in the development of these novel nanoadsorbents for decontamination of wastewaters have also been examined to help identify future directions for this emerging field to continue to grow.
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Singh AK, Tripathi YB, Pandey N, Singh DP, Tripathi D, Srivastava ON. Enhanced antilipopolysaccharide (LPS) induced changes in macrophage functions by Rubia cordifolia (RC) embedded with Au nanoparticles. Free Radic Biol Med 2013; 65:217-223. [PMID: 23774043 DOI: 10.1016/j.freeradbiomed.2013.06.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Accepted: 06/04/2013] [Indexed: 11/16/2022]
Abstract
In this paper, we have shown that gold nanoparticles (Au (NPs)) embedded in Rubia cordifolia (RC) matrix (RC-Au (NPs)) exhibit a high therapeutic value relating to its anti-inflammatory characteristics. It was prepared by utilizing the reducing properties of RC to convert HAuCl4 into Au (NPs). In order to compare its effectiveness, with respect to Au (NPs), the latter was synthesized separately by reducing HAuCl4 with lemon extract. These Au (NPs) along with RC-Au (NPs) were characterized by X-ray diffractometry (XRD), transmission electron microscopy (TEM), and UV-visible spectroscopy. The enhancement in anti-inflammatory characteristics was assessed as its inhibitory potential for lipopolysaccharide (LPS)-induced nitric oxide (NO) release, by rat peritoneal macrophages. The RC-Au (NPs) significantly enhanced its potential to inhibit NO release, which was reported in terms of inhibitory concentration for 50% inhibition (IC50=11.98 ng/ml), as compared to either RC extract (IC50=47 × 10(3)ng/ml) or to Au (NPs) (IC50=587.50 ng/ml).
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Affiliation(s)
| | - Yamini B Tripathi
- Department of Medicinal Chemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
| | - Nidhi Pandey
- Department of Medicinal Chemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
| | - D P Singh
- Department of Physics, University of Santiago, Chile
| | - Deepshikha Tripathi
- R and D Centre, Prof SN Tripathi Memorial Foundation, Gandhi Nagar, Naria, Varanasi 221005, India
| | - O N Srivastava
- Department of Physics, Banaras Hindu University, Varanasi, India 2210055.
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Ciobanu CS, Iconaru SL, Pasuk I, Vasile BS, Lupu AR, Hermenean A, Dinischiotu A, Predoi D. Structural properties of silver doped hydroxyapatite and their biocompatibility. Mater Sci Eng C Mater Biol Appl 2012; 33:1395-402. [PMID: 23827587 DOI: 10.1016/j.msec.2012.12.042] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 07/30/2012] [Accepted: 12/05/2012] [Indexed: 12/21/2022]
Abstract
The aim of this study was to obtain a novel hydroxyapatite-based material with high biocompatibility. The structural properties of the samples were well characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray Photoelectron Spectroscopy (XPS). The X-ray diffraction studies revealed the characteristic peaks of hydroxyapatite in each sample. Other phases or impurities were not observed. The scanning electron microscopy observations suggest that the doping components have no influence on the surface morphology of the samples, which reveals a homogeneous aspect of the synthesized particles for all samples. The presence of calcium (Ca), phosphor (P), oxygen (O) and silver (Ag) in the Ag:HAp is confirmed by energy dispersive X-ray (EDAX) and X-ray Photoelectron Spectroscopy analyses. Nanocrystalline silver doped HAp stimulated viability and potentiated the activation of murine macrophages.
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Affiliation(s)
- C S Ciobanu
- National Institute Materials Physics, 105 bis Atomistilor, P.O. Box MG 07, 077125 Bucuresti-Magurele, Romania
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Canullo L, Micarelli C, Lembo-Fazio L, Iannello G, Clementini M. Microscopical and microbiologic characterization of customized titanium abutments after different cleaning procedures. Clin Oral Implants Res 2012; 25:328-336. [PMID: 23210704 DOI: 10.1111/clr.12089] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/29/2012] [Indexed: 12/20/2022]
Abstract
AIM To assess and characterize pollution micro-particles and bacterial growth on customized titanium abutments after steaming, ultrasonic and plasma cleaning treatments. MATERIALS AND METHODS Thirty commercially available implant abutments, after customization, were randomly divided into 3 groups of 10 and cleansed by steam (considered as control group), ultrasonic cleaning (test group 1) and plasma of Argon (test group 2). For all specimens, SEM analysis and EDAX microanalysis were performed to count and characterize pollution micro-particles, both on the abutment surface and implant-abutment connection. For the control and test groups, mean values and standard deviations were calculated for number and density of micro-particles. Statistical differences were determined by one-way ANOVA with Scheffe multiple comparison test. The level of statistical significance was set at P ≤ 0.05. Additional microbiologic analysis was performed to detect bacterial contamination on the abutment surface. RESULTS In the control group, the number of micro-particles on average was 117.5, and 14.1, respectively, on the abutment surface and connection. In the test groups, no pollution was revealed on the abutment (average of 1.09 and 1.13 spots, respectively, in test group 1 and test group 2) and connection (1.28 and 1.41, respectively, in test group 1 and test group 2). The analysis of variance (ANOVA) showed a statistically significant difference for all the variables examined. For each variable, at least one of the groups differs from the others. Scheffe multiple comparison test showed that all comparisons for every variables between the control group and both groups are significant, while there were some comparisons between test group 1 and test group 2 that were not significant. EDAX microanalysis identified micro-particles as residual of lubricant mixed with traces of Titanium and other metals. Microbiologic analysis demonstrated the presence of bacterial growth on the abutment surface only in the control group (111.5 ± 11.43 CFU/ml/implant-abutment as mean value). In the test groups, absence of growing microorganisms was found. CONCLUSIONS This study confirmed that both plasma and ultrasonic treatments can be beneficially adopted for abutment cleaning process after laboratory technical stages, to supposedly favor soft tissue healing and implant-prosthetic connection stability.
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Affiliation(s)
- Luigi Canullo
- Independent Researcher, Private Practice, Rome, Italy
| | | | - Luigi Lembo-Fazio
- Department of Biology and Biotechnology "C. Darwin", University "La Sapienza", Rome, Italy
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