scholarly journals Preparation and Characterization of Ethanol Extract of Spons Xestospongia sp.

2021 ◽  
Vol 2 (1) ◽  
pp. 1-9
Author(s):  
Astrid Indalifiany ◽  
Sahidin Sahidin ◽  
Wahyuni Wahyuni ◽  
Adryan Fristiohady ◽  
Baru Sadarun ◽  
...  
Keyword(s):  
Particle Size ◽  
Ph Value ◽  
Ethanol Extract ◽  
Optical Microscope ◽  
The Body ◽  
Particle Size Analyzer ◽  
Test Parameters ◽  
Particle Size Determination ◽  
Anti Fungal

Background: Xestospongia sp. is a species of the Demospongiae class that can be used as a medicinal substance. Xestospongia sp is known to have various activities such as anticancer, antibiotic, anti-fungal, cardiotonic, and antimalarial. One of the ways to make the formulation of natural ingredients is the phytosome vesicle technique. This method can be used to increase the penetration of compounds through cell membranes, increase their absorption and increase its bioavailability in the body. Objective: The aim of this study was to obtain the optimum phytosome composition in the ethanol extract of Xestospongia sp. and phosphatidylcholine with approprite vesicle characteristics. Methods: The preparation was carried out by varying the extract and phosphatidylcholine with a thin layer hydration method at a ratio of 1:1, 1:2, 2:1, and 2:2 and and phytosome characterization was carried out in each of these formulas to obtain the optimal formula. Results: In this study, the optimum phytosome formula has met the criteria based on morphological test parameters using an optical microscope obtained by spherical morphology, stability of physical appearance observations stored at 2oC-8oC ± 1oC temperature, pH measurement using a pH meter obtained a pH value of 4.20, and particle size determination using the Particle Size Analyzer (PSA) obtained a particle size of 180.6 nm and particle distribution value (IP) of 0.133. Conclusion: Composition of the optimum phytosome formula in the ratio of extract and phosphatidylcholine 1: 1 with the LUV phytosome category (Large Unilamellar Vesicle)

Isolasi Dan Karakterisasi Bentonit Alam Menjadi Nanopartikel Monmorillonit

2018 ◽  
Vol 3 (1) ◽  
pp. 12 ◽  
Author(s):  
Zaimahwati Zaimahwati ◽  
Yuniati Yuniati ◽  
Ramzi Jalal ◽  
Syahman Zhafiri ◽  
Yuli Yetri
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Surface Morphology ◽  
Average Diameter ◽  
Particle Size Analyzer ◽  
Ft Ir ◽  
Scanning Electron ◽  
Sedimentation Processes

<p>Pada penelitian ini telah dilakukan isolasi dan karakterisasi bentonit alam menjadi nanopartikel montmorillonit. Bentonit alam yang digunakan diambil dari desa Blangdalam, Kecamatan Nisam Kabupaten Aceh Utara.  Proses isolasi meliputi proses pelarutan dengan aquades, ultrasonic dan proses sedimentasi. Untuk mengetahui karakterisasi montmorillonit dilakukan uji FT-IR, X-RD dan uji morfologi permukaan dengan Scanning Electron Microscopy (SEM). Partikel size analyzer untuk menganalisis dan menentukan ukuran nanopartikel dari isolasi bentonit alam. Dari hasil penelitian didapat ukuran nanopartikel montmorillonit hasil isolasi dari bentonit alam diperoleh berdiameter rata-rata 82,15 nm.</p><p><em>In this research we have isolated and characterized natural bentonite into montmorillonite nanoparticles. Natural bentonite used was taken from Blangdalam village, Nisam sub-district, North Aceh district. The isolation process includes dissolving process with aquades, ultrasonic and sedimentation processes.  The characterization of montmorillonite, FT-IR, X-RD and surface morphology test by Scanning Electron Microscopy (SEM). Particle size analyzer to analyze and determine the size of nanoparticles from natural bentonite insulation. From the research results obtained the size of montmorillonite nanoparticles isolated from natural bentonite obtained an average diameter of 82.15 nm.</em></p>

Effect of Process on the Dielectric Properties of BaTiO3-Based X9R Ceramics

2014 ◽  
Vol 906 ◽  
pp. 18-24 ◽  
Author(s):  
Bao Lin Zhang ◽  
Bin Bin Zhang ◽  
Ning Ning Wang ◽  
Jing Ming Fei
Keyword(s):  
Particle Size ◽  
Dielectric Properties ◽  
Milling Time ◽  
Sintering Temperature ◽  
Sintering Process ◽  
X Ray Diffraction ◽  
Sintered Ceramic ◽  
X Ray ◽  
Particle Size Analyzer

The effect of milling time and sintering process on the dielectric properties of BaTiO3-based X9R ceramics was investigated. The characterization of the raw powders and the sintered ceramic was carried out by X-ray diffraction and scanning electron microscopy. The particle size distribution of the mixed powders was examined by Laser Particle Size Analyzer. The results shown that with the milling time extended, the Cruie Peak was depressed, or even disappeared. Moreover, with the rise of sintering temperature, the dielectric constant of the ceramics increased and the dielectric loss decreased gradually. Eventually, by milling for 11h and sintering at 1090°Cfor 2h, good dielectric properties were obtained, which were ε25°C≥ 2526, εr/εr25°C≤± 12% (–55~200°C), tanδ≤1.12% (25°C).

Synthesis and Characterization of a Novel Folate-Conjugated Themoresponsive Micelles

2012 ◽  
Vol 529 ◽  
pp. 555-559 ◽  
Author(s):  
Jing Jin ◽  
Jian Peng Xue ◽  
Si Si Cui ◽  
Jie Cao ◽  
Dong Yin Zhang ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Particle Size ◽  
Amphiphilic Copolymer ◽  
Feed Ratio ◽  
Synthesis And Characterization ◽  
Amphiphilic Copolymers ◽  
Living Body ◽  
Particle Size Analyzer ◽  
Copolymer Poly

In this study, a amphiphilic copolymer, poly ((N-isopropylacrylamide)-co-acrylamide-co- (octadecylacrylate)-co-(Falate-(polyethyleneglycol)-(acrylicacid)))(P(NIPA-co-AAm-co-ODA-co-FPA)) micelles was synthesized by free radical random copolymerization. The obtained amphiphilic copolymers were self-assembled into micelles, which exhibited thermally sensitivity. LCST of the micelles was detected by uv-vis spectrophotometer. The diameter and morphology of micelles were determined by laser particle size analyzer (LPSA) and transmittance electron microscope (TEM), respectively. The micelle with a diameter of 60 nm and LCST of 40 oC was obtained by utilizing of ODA and the feed ratio of NIPA and AAm, respectively, which is satisfied for drug delivery in living body. The maximum DLC was achieved with the amount of ODA (180mg).

scholarly journals Synthesis of Silver Nanoparticles Using Muntingia Calabura L. Leaf Extract as Bioreductor and Applied as Glucose Nanosensor

2018 ◽  
Vol 34 (6) ◽  
pp. 3088-3094 ◽  
Author(s):  
Abdul Wahid Wahab ◽  
Abdul Karim ◽  
Nursiah La Nafie ◽  
Nurafni Nurafni ◽  
I. Wayan Sutapa
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Reduction Method ◽  
Measurement Range ◽  
Structure Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Particle Size Analyzer ◽  
Muntingia Calabura

Silver nanoparticles have been synthesized by reduction method using extract of Muntingia calabura L. leaf a bioreductor. The process of silver nanoparticles formation was monitored by UV-Vis method. The results showed that the absorbance values increased according to the increase of reaction time. Maximum absorption of silver nanoparticle was obtained at a wavelength of 41-421 nm. The size of silver nanoparticles was determined using a PSA (Particle Size Analyzer) with a particle size distribution of 97.04 nm. The functional groups compound that contribute in the synthesis was analyzed using Fourier Transform Infrared Spectroscopy (FTIR). Morphology of the silver nanoparticles was observed by an Scanning Electron Microscope instrument and the structure characterization of the compounds were analyzed using X-Ray Diffraction. The glucose nanosensor based on silver nanoparticles have the measurement range of 1 mM - 4 mM with the regretion (R2) is 0,9516, the detection limit of sensor is 3,2595 mM, the sensitivity of sensor is 2,0794 A. mM-1. mM-2.

Preparation and Characterization of Monodisperse Ceria Microspheres

2010 ◽  
Vol 434-435 ◽  
pp. 850-852
Author(s):  
Qi Wang ◽  
Bo Yin ◽  
Zhen Wang ◽  
Gen Li Shen ◽  
Yun Fa Chen
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Particle Size ◽  
Electron Microscope ◽  
Crystalline Form ◽  
X Ray ◽  
Transmission Electron ◽  
Particle Size Analyzer ◽  
Scanning Electron

In present work, ceria microspheres were synthesized by template hydrothermal method. Crystalline form of the as-synthesized ceria microspheres was defined by X-ray powder diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). Dispersibility of ceria microspheres was comprehensively characterized using scanning electron microscope (SEM) observation and laser particle size analyzer. Furthermore, the ultraviolet light absorption performances of ceria microspheres with several different sizes were compared by ultraviolet visible spectrophotometer. The results showed that ceria microspheres presented excellent UV absorbent property and the size influence was remarkable.

scholarly journals Preparation and Characterization of Citrus Aurantifolia Lime Oils Microcapsules by Complex Coacervation Technique

2021 ◽  
Vol 71 (12) ◽  
pp. 146-155
Author(s):  
Euis Julaeha ◽  
Mohamad Nurzaman ◽  
Diana Rakhmawaty Eddy ◽  
Dikdik Kurnia ◽  
Sandra Puspita ◽  
...  
Keyword(s):  
Particle Size ◽  
Encapsulation Efficiency ◽  
Oil Content ◽  
Core Shell ◽  
Complex Coacervation ◽  
Citrus Aurantifolia ◽  
Particle Size Analyzer ◽  
Ratio Speed ◽  
Improved Performance

The Lime oil of Citrus aurantifolia was microencapsulated by coacervation technique employing gelatine and alginates as the shells, and calcium chloride as cross linker. Optimization of core/shell ratio, speed and temperature of stirring was carried out. Structure and shape of the microcapsules were characterized by particle size analyzer (PSA) and scanning electron microscope (SEM) respectively. The properties of microcapsules such as, yield, particle size distribution, oil content, oil load, and encapsulation efficiency were also determined. Upon condition of ratio core/shell 0.49, speed and temperature of stirring at 600 rpm and 35 �C respectively, the microcapsules of LOs with improved performance were achieved with efficiency of 46% and oil content of 78%.

Preparation and Stability Characterization of Copper Oxide Nanofluid by Two Step Method

2015 ◽  
Vol 832 ◽  
pp. 139-143 ◽  
Author(s):  
A.L. Subramaniyan ◽  
Arun Kumar ◽  
Sethupathi ◽  
T. Sorna Kumar ◽  
R. Ilangovan
Keyword(s):  
Particle Size ◽  
Copper Oxide ◽  
Copper Chloride ◽  
Sol Gel ◽  
Cuo Nanoparticles ◽  
Step Method ◽  
Sem Image ◽  
Particle Size Analyzer ◽  
Negative Zeta Potential

Copper oxide (CuO) nanofluids are prepared by two step method. CuO nanoparticles are prepared by sol gel method with Copper chloride as precursor and NaOH as a reducing agent. The prepared CuO nanoparticles are characterized by XRD, SEM and Particle size analyzer. XRD measurements reveal a grain size of 72nm .SEM image reveals an inhomogenous mixture of particles from 500 nm to 3500 nm with irregular morphology and few traces of CuO cones.. The particle size distribution of CuO particles is in the range of 1000-1600nm which is in accordance with the SEM results.CuO –Ethylene Glycol nanofluids are prepared by two step method by ultrasonication of obtained CuO particles.The stability of CuO nanofluid is given with a negative zeta potential of-22.5 mv.

Synthesis and Characterization of Li-Ti-O Nano-Composites and Their Doped BaTiO3 Based X7R-Type Ceramics

2010 ◽  
Vol 148-149 ◽  
pp. 1575-1579
Author(s):  
Qing Zhang ◽  
Rui Yuan Niu ◽  
Min Wang ◽  
Bin Cui ◽  
Zhu Guo Chang
Keyword(s):  
Particle Size ◽  
Dielectric Properties ◽  
Ph Value ◽  
Sol Gel ◽  
Nano Composites ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Minimum Particle Size ◽  
Sol Gel Process

Li-Ti-O (abbreviated as LTO) nano-composites were synthesized via sol-gel process, and then doped BaTiO3 based X7R type ceramics. The LTO nano-composites and their ceramics were characterized by means of thermaogravimetric, Fourier-transform infrared, X-ray diffraction methods, transmission electron microscopy. We also characterized the dielectric properties of the LTO doped BaTiO3 based ceramics of X7R type. The results indicated that LTO nano-composites were nanometer scale powders. The pH value and calcining temperature had an influence on particle size of LTO sintering aids. At pH about 3 and with calcining at 600 °C, the nano-composites attained minimum particle size (about 10 nm). By adding 0.10 wt% of the LTO nano-composites, the temperature permittivity achieved about 4200 when sintered at 1240 °C for 4 h, and the dielectric properties met X7R standard.

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