Characterization of polyherbal-incorporated polycaprolactone nanofibrous mat for biomedical applications

2019 ◽  
Vol 34 (4-5) ◽  
pp. 401-411
Author(s):  
Rajalakshmi Ramamoorthy ◽  
Muthumanickkam Andiappan ◽  
Murugesan Muthalagu
Keyword(s):  
Drug Release ◽  
Biomedical Applications ◽  
X Ray Diffraction ◽  
Time Intervals ◽  
Drug Release Rate ◽  
Electrospinning Technique ◽  
X Ray ◽  
Thermogravimetric Analyzer ◽  
Physical And Chemical

The polyherbal-loaded polycaprolactone nanofibrous mat was prepared by electrospinning technique, and physical and chemical characteristics of nanofibrous mats were studied using scanning electron microscopy, x-ray diffraction, thermogravimetric analyzer, and Fourier transform infrared spectroscopy. The presence of various phytochemicals in the crude monoherbal and polyherbal extracts was analyzed. The antimicrobial activity and biocompatibility of the polyherbal-loaded nanofibrous mats were studied. The drug release pattern of the polyherbal-loaded nanofibrous mats was studied at different time intervals. The 5% drug-loaded nanofibrous mat shows higher sustainable drug release rate than 1% and 3% drug-loaded nanofibrous mats. The cell viability was found to be 98.91%, 98.77%, 98.5%, and 98.22% for polycaprolactone and 1%, 3%, and 5% for polyherbal-loaded nanofibrous mats, respectively.

Characterization of Shivirtui Zeolite Modified with Aluminum Oxyhydroxide Nanofibers

2019 ◽  
Vol 942 ◽  
pp. 40-49
Author(s):  
Yulia Murashkina ◽  
Olga B. Nazarenko
Keyword(s):  
Chemical Properties ◽  
Nitrogen Adsorption ◽  
X Ray Diffraction ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
X Ray ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Aluminum Oxyhydroxide

Natural zeolite of Shivirtui deposit (Russia) was modified with nanofibers of aluminum oxyhydroxide AlOOH. Aluminum oxyhydroxide nanofibers were produced at the heating and oxidation of aluminum powder with water. The properties of modified zeolite were investigated by means of X-ray diffraction, transmission electronic microscopy, scanning electronic microscopy, low-temperature nitrogen adsorption, thermal analysis, and Fourier transform infrared spectroscopy. It was found that water content in the modified sample of zeolite was about 15 %. Based on the study of the physical and chemical properties, shivirtui zeolite modified with nanofibers of aluminum oxyhydroxide can be proposed for use as a flame-retardant additive to polymers.

FTIR Characterization Of PZT Nano Fibers Synthesized from Metallo-organic Compounds Using Electrospinning

2002 ◽  
Vol 736 ◽  
Author(s):  
Yu Wang ◽  
Jorge J. Santiago-Avilés
Keyword(s):  
Substrate Surface ◽  
Pyrochlore Phase ◽  
Precursor Solution ◽  
X Ray Diffraction ◽  
Electrospinning Technique ◽  
Good Correspondence ◽  
X Ray ◽  
Ftir Characterization ◽  
Silicon Substrate Surface

ABSTRACTWe have synthesized Pb(Zr0.54Ti0.48)O3 fibers with diameter ranging from 500 nm to several microns using electrospinning and metallo-organics decomposition (MOD) techniques. By a refinement of our electrospinning technique, i.e. by increasing the viscosity of the precursor solution, and by adding a filter to the tip of the syringe, the diameter of synthesized PZT fibers has been reduced to the neighborhood of a hundred nanometers. The complex thermal decomposition was characterized using Fourier-transform infrared (FTIR) spectroscopy and x-ray diffraction (XRD). It was found that alcohol evaporated during electrospinning and that the organic groups had pyrolized before the intermediate pyrochlore phase was formed. There is a good correspondence between XRD and FTIR spectra. It was also found that a thin film of platinum coated on silicon substrate surface not only seems to have catalyzed the phase transformation to PZT but also favored the formation of 110 texture in the synthesized PZT fibers.

Characterization of Tungsten Silicides Formed by Rapid Thermal Annealing.

1985 ◽  
Vol 52 ◽  
Author(s):  
M. Siegal ◽  
J. J. Santiago ◽  
J. Van der Spiegel
Keyword(s):  
High Vacuum ◽  
Diffusion Profile ◽  
X Ray Diffraction ◽  
Mixed Composition ◽  
Time Intervals ◽  
X Ray ◽  
Radiation Sources ◽  
New Phase ◽  
Film Side

ABSTRACTTungsten silicide samples were formed by sputter depositing 80 nm W metal onto (100) oriented, 5 ohm-cm Si wafers. After deposition, the samples were fast radiatively processed in an RTA system using quartz-halogen tungsten lamps as radiation sources for time intervals ranging from 20 to 60s under high vacuum. Films processed at 22–25 W/cm2 radiation with the film side of the samples oriented away from the lamps result in films which are metallic or cloudy in color, and have mixed composition as evidenced by x-ray diffraction (W, W5 Si3 and WSi2). Films processed with the film side oriented toward the lamps show the occurrence of a phase transforF.ation clearly nucleated at the film edge. The new phase is grey and mostly composed of WSi2, with film resistivities 55–60 μΩ-cm. AES measurements show a uniformly distributed Si diffusion profile into the metal film, while SEM indicates a nucleation and growth of the phase once diffusion occurs.

Physical and Chemical Properties of Mineral in Soils of Cassava Cropping Area: A Case Study in Chonburi Province

2014 ◽  
Vol 979 ◽  
pp. 440-443
Author(s):  
W. Siriprom ◽  
K. Teanchai ◽  
S. Kongsriprapan ◽  
J. Kaewkhao ◽  
N. Sangwaranatee
Keyword(s):  
Thermo Gravimetric Analysis ◽  
Chemical Properties ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Physical And Chemical ◽  
And Chemical Properties

The chemical and physical properties of topsoil and subsoil which collected from the cassava cropping area in Chonburi Province have been investigated. The characterization of both soil sample were used X-Ray Diffraction (XRD), Energy Dispersive X-Ray Fluorescence (EDXRF) while FTIR used to confirmed the formation of intermolecular bonding and Thermo-Gravimetric Analysis (TGA) used for investigated the crystalline. It was found that, the XRD pattern indicated quartz phase. The chemical composition by XRF reported that the soils samples consist of Si, Al, Ca, Fe, K, Mn, Ti, Cr, Zn, Ag and Cu. and TGA results, noticed that the removal of moisture and organics material.

Study and Characterization of Powders Nanocomposites Calcium Phosphate/Silica-Gel (SiO2n) Obtained from Attrition Milling: For Biomedical Applications

2008 ◽  
Vol 396-398 ◽  
pp. 615-618
Author(s):  
Rodrigo Brandão ◽  
Fernando Pupio ◽  
Nelson Heriberto A. Camargo ◽  
E. Gemelli
Keyword(s):  
Calcium Phosphate ◽  
Silica Gel ◽  
Biomedical Applications ◽  
Bone Matrix ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Attrition Milling ◽  
Bone Calcium

The bioceramics nanostructured have made important characteristics in biomedical applications, especially the calcium phosphate ceramics. The aim of this work is synthesis and characterization of calcium phosphate and nanocomposites powders, the method of dissolution of CaO in liquid medium, precipitation and formation of bone calcium phosphate matrix, and nanocomposites by adding the solution of phosphoric acid (H3PO4). The nanocomposites powders were synthesized using as strengthening silica gel nanometer (20nm) at concentrations of 1%, 2%, 3% and 5% by volume and subjected to heat treatment to 900°C for 2 hours, seeking obtained HA (Hydroxyapatite). Later the bone matrix of calcium phosphate and nanocomposites powders were subjected from process attrition milling for 2 hours, by way of comparison. The studies characterizations were conducted through the technique of X-ray diffraction, scanning electron microscopy (SEM) and dilatometric test.

Synthesis and characterization of a composite organic semiconductor (curcumin-paracetamol/TiO2)

2020 ◽  
pp. 096739112092169
Author(s):  
Asmaa Bouazza ◽  
Salah Bassaid ◽  
Bouabdallah Daho ◽  
Massimo Messori ◽  
Abdelkader Dehbi
Keyword(s):  
Organic Semiconductor ◽  
Chemical Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Production Water ◽  
Synthesis Methodology ◽  
Physical And Chemical ◽  
Electronic And Structural Properties ◽  
And Chemical Properties

The aim of this work is to study some physical and chemical properties of an organic semiconductor (OSc)/ x%titanium dioxide (TiO2) heterosystem (with 0 ≤ x ≤ 20%) (OScs/ x%TiO2). The OSc is obtained from pure curcumin and paracetamol as starting molecules. The synthesis methodology of the mixtures of OScs/ x%TiO2 heterosystem involves a microwave-assisted multicomponent reaction using curcumin, paracetamol, and TiO2 as a heterogeneous solution. All mixtures were analyzed by Fourier-transform infrared spectroscopy, Raman spectroscopy, thermogravimetric analysis/differential thermal analysis, X-ray diffraction, ultraviolet–visible spectroscopy, and scanning electron microscopy. The results obtained show a new nanocomposite with interesting pharmaceutical, optical, electronic, and structural properties, which can be used in the fields of energy production, water purification, and air purification, as a biomaterial and for electronic applications.

Preparation and Characterization of PET/MMT Nanocomposition Modified by MDI

2014 ◽  
Vol 904 ◽  
pp. 7-9
Author(s):  
Xiao Hua Gu ◽  
Xi Wei Zhang ◽  
Bao Yun Xu ◽  
Peng Zeng
Keyword(s):  
Thermal Stability ◽  
In Situ Polymerization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thermogravimetric Analyzer ◽  
Organic Montmorillonite ◽  
Polymerization Method ◽  
Thermal Stability Of

In this paper, the diphenyl methane diisocyanate (MDI) was used to modify montmorillonoid (MMT) and got the organic montmorillonite (OMMT), which was used with the monomers of PET by in situ polymerization method to prepare PET/MMT nanocomposition. The OMMT was analyzed by the X ray diffraction (XRD) to test the change of the spacing layer. Dispersion of MMT in the PET/MMT nanocomposites were studied with XRD and SEM and by means of thermogravimetric analyzer (TGA) on the thermal stability of PET/MMT nanocomposites. The results showed that, MDI modified MMT successfully, and the compatibility of MMT and PET was increased .

Preparation of Magnetite-Mg/Al Hydrotalcite through Hydrothermal Process and Subsequent Calcination

2015 ◽  
Vol 1101 ◽  
pp. 336-339 ◽  
Author(s):  
Triastuti Sulistyaningsih ◽  
Sri Juari Santosa ◽  
Dwi Siswanta ◽  
Bambang Rusdiarso
Keyword(s):  
Hydrothermal Process ◽  
Chemical Properties ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Subsequent Calcination ◽  
The Fourier Transform ◽  
Physical And Chemical ◽  
And Chemical Properties

Fe3O4/Mg-Al-NO3-hydrotalcite composite compounds have been synthesized by hydrothermal process followed by calcination to learn the differences in physical and chemical properties of each compound. Hydrothermal was performed at a temperature of 120 °C for 5 h and calcinations was at 450 °C for 3 hours. Characterization of the composite compounds was conducted using the Fourier Transform Infrared Spectroscopy (FTIR), the X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and Vibrating Sample Magnetometer (VSM). The characterization results showed that crystallinity, surface area and magnetic properties of hydrothermally treated Mg/Al hydrotalcite-magnetite were higher than those unhydrothermal and calcination products.

Characterization of Electrophoretically Deposited Chitosan Coatings on Ti13Zr13Nb Alloy for Biomedical Applications

2013 ◽  
Vol 203-204 ◽  
pp. 212-215 ◽  
Author(s):  
Bożena Łosiewicz ◽  
Grzegorz Dercz ◽  
Magdalena Szklarska ◽  
Wojciech Simka ◽  
Marta Łężniak ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Biomedical Applications ◽  
X Ray Diffraction ◽  
Bioactive Coatings ◽  
X Ray ◽  
Scanning Electron ◽  
Deposition Conditions

The chitosan (CH) coatings on a Ti13Zr13Nb alloy substrate were obtained by electrophoretic deposition (EPD). The EPD yield was investigated under different deposition conditions. The microstructure of the CH coatings obtained by cataphoresis was studied by scanning electron microscopy and the chemical composition was examined using EDAX. The functional groups and formed phases were analyzed using Fourier transform infrared spectroscopy and X-ray diffraction, respectively. It was found that the CH coating thickness and porosity can be controlled by time and voltage used for the EPD process. It was ascertained that the studied EPD of the natural biopolymer, chitosan, in aqueous solution is applicable for the surface modification of the Ti13Zr13Nb implants to develop novel bioactive coatings.

scholarly journals Folic Acid-Conjugated Silica-Modified TbPO4·H2O Nanorods for Biomedical Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Le Thi Vinh ◽  
Tran Thu Huong ◽  
Ha Thi Phuong ◽  
Hoang Thi Khuyen ◽  
Nguyen Manh Hung ◽  
...  
Keyword(s):  
Folic Acid ◽  
Biomedical Applications ◽  
Breast Cancer Cells ◽  
Hexagonal Phase ◽  
X Ray Diffraction ◽  
Chemical Methods ◽  
X Ray ◽  
Wet Chemical ◽  
The Fourier Transform

We report on the synthesis and characterization of folic acid-conjugated silica-modified TbPO4·H2O nanorods for biomedical applications. The uniform shape TbPO4·H2O nanorods with a hexagonal phase were successfully synthesized by wet chemical methods. A novel TbPO4·H2O@silica-NH2 nanocomplex was then formed by functionalizing these nanorods with silica and conjugating with biological agents. The field emission scanning electron microscopy, energy-dispersive X-ray, and X-ray diffraction reveal the morphology and structure of the nanorods, with their controllable sizes (500-800 nm in length and 50-80 nm in diameter). The Fourier transform infrared spectroscopy was employed to identify chemical substances or functional groups of the TbPO4·H2O@silica-NH2 nanocomplex. The photoluminescence spectra show the four emission lines of TbPO4·H2O@silica-NH2 in folic acid at 488, 540, 585, and 621 nm under 355 nm laser excitation, which could be attributed to the 5D4-7 F j ( J = 6 , 5 , 4 , 3 ) transitions of Tb3+. The TbPO4·H2O@silica-NH2 nanorods were conjugated with folic acid for the detection of MCF7 breast cancer cells. The obtained results show a promising possibility for the recognition of living cells that is of crucial importance in biolabeling.

Sign in / Sign up

Export Citation Format

Share Document