scholarly journals Formulation and characterization of self emulsifing pellets of carvedilol

2015 ◽  
Vol 51 (3) ◽  
pp. 663-671 ◽  
Author(s):  
Vikas Bhandari ◽  
Amelia Avachat
Keyword(s):  
Ternary Phase Diagram ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Water Soluble ◽  
Tween 20 ◽  
Lipophilic Compounds ◽  
Water Soluble Drug ◽  
Pellet Form ◽  
Capmul Mcm

The purpose of present study was aimed at developing self emulsifying drug delivery system in liquid and then in pellet form that would result in improved solubility, dissolution and permeability of the poorly water soluble drug carvedilol. Pellets were prepared using extrusion-spheronization technique incorporating liquid SEDDS (carvedilol, capmul MCM EP, cremophore EL, tween 20, propylene glycol), adsorbents ( and crospovidone), microcrystalline cellulose and binder (povidone K-30). Ternary phase diagram was constructed to identify different oil-surfactant-cosurfactant mixtures according to the proportion of each point in it. The optimal CAR-SEDDS pellets showed a quicker redispersion with a droplet size of the reconstituted microemulsion being 160.47 nm, which was almost unchanged after solidification. SEM analysis confirmed good spherical appearance of solid pellets; DSC and XRD analysis confirmed that there was no crystalline carvedilol in the pellets. Pellets were then capable of transferring lipophilic compounds into the aqueous phase and significantly enhancing its release with respect to pure drug.

Fabrication and characterization of nanostructured lipid carrier system for effective delivery of poorly water-soluble drug quetiapine fumarate

2021 ◽  
pp. 6235-6244
Author(s):  
Deepak Patil ◽  
Seema Pattewar ◽  
Sarvesh Palival ◽  
Gargi Patil ◽  
Swapnil Sharma
Keyword(s):  
Entrapment Efficiency ◽  
Water Soluble ◽  
Nanostructured Lipid Carrier ◽  
Quetiapine Fumarate ◽  
Water Soluble Drug ◽  
Effective Delivery ◽  
Capmul Mcm ◽  
Central Composite ◽  
Poorly Water Soluble Drug

The aim of present study is to investigate the potential of nanostructured lipid carriers (NLCs) in improving the oral bioavailability of quetiapine fumarate, a second-generation antipsychotic drug. Quetiapine Fumarate (QF) loaded NLC were prepared by hot homogenization followed by an ultrasonication method. Response surface methodology - central composite design (CCD) was used to systemically examine the influence of concentration of capmul MCM EP, concentration of poloxamer 188 and concentration of egg lecithin on particle size (PS) and % entrapment efficiency (% EE) and to optimize the NLC formulation. The CCD consists of three factored design with five levels, plus and minus alpha (axial points), plus and minus 1 (factorial points) and the centre point. A mathematical relationship between variables was created by using Design Expert software Version 12. The statistical evaluations revealed that three independent variables were the important factors that affected the PS and % EE of QF loaded NLC. The best fitted mathematical model was linear and quadratic for PS and % EE respectively. The optimized formulations found with 218.1±0.14nm of PS and 93±0.16% of % EE. Results illustrated the superiority of developed QF loaded NLC formulation as a stable drug delivery system, providing better bioavailability with the possibility of better treatment for psychological disorders.

Formulation and Evaluation of Solid Self-Nanoemulsifying Drug Delivery System for Enhancing the Solubility and Dissolution Rate of Budesonide

2021 ◽  
pp. 5755-5763
Author(s):  
Kanuri Lakshmi Prasad ◽  
Kuralla Hari
Keyword(s):  
Drug Delivery ◽  
Drug Release ◽  
Dissolution Rate ◽  
Drug Delivery System ◽  
Delivery System ◽  
Ternary Phase Diagram ◽  
Water Soluble ◽  
Drug Release Profile ◽  
Water Soluble Drug

Objective: To enhance solubility and dissolution rate of budesonide through development of solid self-nanoemulsifying drug delivery system (S-SNEDDS). Methods: Liquid self-nanoemulsifying drug delivery systems (L-SNEDDS) were prepared and ternary phase diagram was constructed using Origin pro 8. Liquid self-nanoemulsifying formulation LF2 having 20% oil and 80% of surfactant/co-surfactant was optimized from the three formulations (LF1-LF3) to convert in to solid, through various characterization techniques like self-emulsification, in vitro drug release profile and drug content estimation. The prepared L-SNEDDS converted into S-SNEDDS, SF1-SF6 by adsorption technique using Aerosil 200, Neusilin US2, and Neusilin UFL2 to improve flowability, compressibility and stability. Results: Formulation LF2 exhibited globule size of 82.4 nm, PDI 0.349 and Zeta potential -28.6 mV with drug indicating the stability and homogeneity of particles. The optimized formulation SF4 containing Neusilin UFL2 was characterized by DSC, FTIR, X-Ray diffraction studies and found no incompatibility and no major shifts were noticed. Formulation SF4 released 100 % drug in 20 min against pure drug release of 47 % in 60 min. Regardless of the form (i.e. liquid or solid) similar performance of emulsification efficiency is observed. Conclusion: The results demonstrated that the technique of novel solid self-nanoemulsifying drug delivery system can be employed to enhance the solubility and dissolution rate of poorly water-soluble drug budesonide.

Formulation development and characterization of highly water-soluble drug-loaded extended-release pellets prepared by extrusion–spheronization technique

2019 ◽  
Vol 16 (5) ◽  
pp. 1351-1365
Author(s):  
Muhammad Iqbal Nasiri ◽  
Rabia Ismail Yousuf ◽  
Muhammad Harris Shoaib ◽  
Kamran Zaheer ◽  
Tariq Ali ◽  
...  
Keyword(s):  
Extended Release ◽  
Water Soluble ◽  
Formulation Development ◽  
Water Soluble Drug ◽  
Extrusion Spheronization

Microstructural Characterization of Silicide Coatings on Mo and TZM Alloy

2014 ◽  
Vol 1036 ◽  
pp. 164-167 ◽  
Author(s):  
Grzegorz Moskal ◽  
Lucjan Swadźba ◽  
Wacław Supernak ◽  
Marta Mikuśkiewicz ◽  
Adrian Mościcki ◽  
...  
Keyword(s):  
Diffusion Process ◽  
Microstructural Characterization ◽  
Deposition Process ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Pack Cementation ◽  
Molybdenum Alloys

Characterization of microstructure of silicide coatings obtained during diffusion process of pack cementation type was showed in this article. The basic materials were pure Mo sheet and TZM molybdenum alloys as well. The coatings were deposited in out of pack process with three different times of exposure. The temperature of deposition process was constant. In first step the phases compositions of coatings was described by XRD analysis. In each cases the MoSi2 phase was obtained on top surface of the coatings. The morphology of the coatings was very similar as well. All types of coatings were characterized by network of cracks on top surface of the coatings. There was no influence of depositions time on phases constituent and coatings topography. LM and SEM analysis revealed that internal coatings morphology was very similar in all cases. Basic differences was related to the thickness of coatings. All coatings were good quality without deep cracks. Microstructure was a columnar-like type without pores and voids.

Self-microemulsifying smaller molecular volume oil (Capmul MCM) using non-ionic surfactants: a delivery system for poorly water-soluble drug

2011 ◽  
Vol 38 (7) ◽  
pp. 883-892 ◽  
Author(s):  
Mithun Mohanraor Bandivadeka ◽  
Shyam Sundar Pancholi ◽  
Ruchika Kaul-Ghanekar ◽  
Amit Choudhari ◽  
Soumya Koppikar
Keyword(s):  
Delivery System ◽  
Water Soluble ◽  
Molecular Volume ◽  
Ionic Surfactants ◽  
Water Soluble Drug ◽  
Poorly Water Soluble ◽  
Capmul Mcm ◽  
Poorly Water Soluble Drug

Preparation and Characterization of Collagen/Hydroxyapatite Microsphere Composite Scaffold for Bone Regeneration

2013 ◽  
Vol 587 ◽  
pp. 239-244 ◽  
Author(s):  
Kunjalukkal Padmanabhan Sanosh ◽  
Francesca Gervaso ◽  
Alessandro Sannino ◽  
Antonio Licciulli
Keyword(s):  
Pore Diameter ◽  
Composite Scaffold ◽  
Collagen Matrix ◽  
Average Diameter ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Average Pore ◽  
Eds Analysis ◽  
Bet Analysis

In the present work Collagen/Hydroxyapatite microsphere (Col/mHA) scaffold with a multiscale porosity was prepared. Col/mHA composite scaffold was prepared by freeze-drying/dehydrothermal crosslinking method. The HA microspheres (mHA) were obtained by spray drying of nanohydroxyapatite slurry prepared by precipitation technique. XRD analysis revealed that the microspheres were composed only of pure HA phase and EDS analysis revealed that Ca/P ratio was 1.69. The obtained microspheres had an average diameter 6 microns, specific surface area of 40 m2/g by BET analysis and BJH analysis shows meso porous structure having an average pore diameter 16nm. SEM analysis shows that the obtained Col/mHA scaffold had a macro porosity ranging from micron to 200 microns with meso porous mHA embedded in the collagen matrix.

Design and Characterization of Self-Nanoemulsifying Drug Delivery Systems of Rosuvastatin

2018 ◽  
Vol 11 (2) ◽  
pp. 4042-4052
Author(s):  
Bhikshapathi D. V. R. N. ◽  
Priya Keerthi
Keyword(s):  
Drug Delivery ◽  
Zeta Potential ◽  
Oral Bioavailability ◽  
Drug Delivery Systems ◽  
Ternary Phase Diagram ◽  
Delivery Systems ◽  
Water Soluble ◽  
Lipid Lowering ◽  
Tween 20 ◽  
Onset Of Action

Development of self-emulsifying drug delivery systems (SEDDS) are becoming more popular to improve the oral bioavailability of poorly water-soluble drugs. Rosuvastatin is a lipid-lowering agent used in patients suffering from dyslipidemia. It is a competitive inhibitor of 3-hydroxy 3-methyl glutaryl coenzyme A, which converts mevalonate to cholesterol. Rosuvastatin is a BCS class II (poor solubility) drug; hence, SNEDDS are being formulated to enhance oral bioavailability of the drug. In the present study, rosuvastatin SNEDDS were formulated using different oils, surfactant and co-surfactant. The optimized formulation F9 has composition of Las (PEG-8-Caprylic glycerides), Maisine 35-1 and Tween 20 as oil phase, surfactant and co-surfactant respectively. Composition of SNEDDS was optimized using Pseudo-ternary phase diagram, where the formulations showed increased self-emulsification with increased concentration of surfactants. Formulation F9 was found to be best formulation based on evaluation parameters. The particle size of the optimized SNEDDS formulation was found to be 10.9 nm & Z-Average of 55.6 nm indicating all the particles were in the nanometer range. The zeta potential of the optimized SNEDDS formulation was found to be -11.2 mV, which comply with the requirement of the zeta potential for stability. The developed rosuvastatin SNEDDS have the potential to minimize the variability in absorption and provide rapid onset of action of the drug.   

Design, Optimization and Evaluation of Repaglinide Self-Nanoemulsifying Drug Delivery for Enhanced Solubility

2017 ◽  
Vol 10 (6) ◽  
pp. 3920-3928
Author(s):  
Mahalaxmi K ◽  
Sailu Ch
Keyword(s):  
Drug Delivery ◽  
Water Soluble ◽  
In Vitro Dissolution ◽  
Antidiabetic Drug ◽  
Water Soluble Drug ◽  
Enhanced Solubility ◽  
Poorly Water Soluble ◽  
Capmul Mcm ◽  
Poorly Water Soluble Drug

The aim of study was to develop self-nanoemulsifying systems of poorly water-soluble drug repaglinide, which is an antidiabetic drug in the class of medications known as meglitinides. Solubility of repaglinide in oily phases and surfactants was determined to identify components of self-nanoemulsifying drug delivery system (SNEDDS). Surfactants and oil was selected based on solubility studies were further screened for their efficiency in formulation. Acrysol K 150, Kolliphor EL and Capmul MCM were selected as oil, surfactant and co-surfactant respectively. Formulation F8 was found to be optimized formulation on the basis of in vitro dissolution studies, particle size and zeta potential. The optimized formulation was then subjected to stability studies and was found to be stable after 6 months. Thus, SNEDDS were found to be influential in improving the release performance of repaglinide, indicating their potential to improve the solubility and oral bioavailability of repaglinide.  

scholarly journals Physicochemical characterization of solid dispersion systems of tadalafil with poloxamer 407

2009 ◽  
Vol 59 (4) ◽  
pp. 453-461 ◽  
Author(s):  
Vikrant Vyas ◽  
Pankajkumar Sancheti ◽  
Poonam Karekar ◽  
Manali Shah ◽  
Yogesh Pore
Keyword(s):  
Solid Dispersion ◽  
Binary Systems ◽  
Physicochemical Characterization ◽  
Water Soluble ◽  
Poloxamer 407 ◽  
Dissolution Enhancement ◽  
Water Soluble Drug ◽  
Dispersion Systems ◽  
Rapid Dissolution

Physicochemical characterization of solid dispersion systems of tadalafil with poloxamer 407 Dissolution behaviour of a poorly water-soluble drug, tadalafil, from its solid dispersion systems with poloxamer 407 has been investigated. Solid dispersion systems of tadalafil were prepared with poloxamer 407 in 1:0.5, 1:1.5 and 1:2.5 ratios using the melting method. Characterization of binary systems with FTIR and XRPD studies demonstrated the presence of strong hydrogen bonding interactions, a significant decrease in crystallinity and the possibility of existence of amorphous entities of the drug. In the binary systems tested, 1:0.5 proportion of tadalafil/poloxamer 407 showed rapid dissolution of tadalafil (DE30 70.9 ± 3.6 %). In contrast, higher proportions of poloxamer 407 (1:1.5 and 1:2.5) offered no advantage towards dissolution enhancement of the drug, indicating altered rheological characteristics of the polymer at its higher concentration, which might have retarded the release rate of tadalafil.

scholarly journals Microwave Absorbing Properties of NiZnCu Ferrite and Polychloropren Composites

2020 ◽  
pp. 27-32 ◽  
Author(s):  
Priscila Richa ◽  
Roberto Costa Lima ◽  
Ana Paula Santiago de Falco ◽  
Ana Paula da Silva ◽  
Elvia Leal ◽  
...  
Keyword(s):  
Single Phase ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Magnetic Losses ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microwave Absorbing Properties ◽  
Absorbing Materials ◽  
Military Applications

Radar-absorbing materials (RAMs) have been used in military applications for several decades to reduce radar detection of vessels and aircrafts. In the present work, the performance of Ni0.35Zn0.35Cu0.3Fe2O4 ferrite as a RAM is investigated. The ferrite was firstly synthesized by combustion reaction and then calcinated at 1200 °C for 1 h. Composites were prepared with 80:20, 70:30 and 60:40 concentrations in weight of ferrite:polychloroprene. The X-ray diffraction (XRD) analysis showed a single phase ferrite formation and the scanning electron microscopy (SEM) analysis of the composites showed a good dispersion of the ferrite in the polychloroprene matrix. The electromagnetic (EM) characterization of the composites revealed that the EM attenuation is mainly attributed to magnetic losses observed in the material. The 80:20 composite achieved the best performance and presented a reflectivity of -26.7 dB at 10.2 GHz.

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