PENINGKATAN LAJU DISOLUSI ACYCLOVIR DENGAN METODE SISTEM DISPERSI PADAT MENGGUNAKAN POLOXAMER 188

2016 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
Budi Setiawan ◽  
Erizal Zaini ◽  
Salman Umar
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Differential Thermal Analysis ◽  
Fourier Transform Infrared ◽  
X Ray Diffraction ◽  
Poloxamer 188 ◽  
X Ray ◽  
Scanning Electron

Sebuah penelitian tentang sistem dispersi padat dari asiklovir dengan poloxamer 188 telah dilakukan formulasi dengan pencampuran secara fisika dengan rasio 1 : 1, 1 : 3, 1 : 5 dan dispersi padat 1 : 1, 1 : 3, 1 : 5 dan penggilingan 1:1 sebagai pembanding. Dispersi padat dibuat menggunakan metode pencairan (fusi), yang digabung dengan poloxamer 188 pada hotplate kemudian asiklovir dimasukkan ke dalam hasil poloxamer 188 lalu di kocok hingga membentuk masa homogen. Semua formula yang terbentuk termasuk asiklovir poloxamer 188 murni dianalisis karakterisasinya dengan Differential Thermal Analysis (DTA), X-ray Diffraction, Scanning Electron Microscopy (SEM), dan Fourier Transform Infrared (FTIR), kemudian pengambilan dilakukan  (penentuan kadar) mengunakan spektrofotometer UV pada panjang gelombang 257,08 nm dan uji laju disolusi dengan aquadest bebas CO2 menggunakan metode dayung. Hasil pengambilan  (penentuan kadar) menunjukkan bahwa semua formula memenuhi persyaratan farmakope Amerika edisi 30 dan farmakope Indonesia edisi 4 yaitu 95-110%. Sedangkan hasil uji laju disolusi untuk campuran fisik 1: 1, dan dispersi padat 1: 1, dan penggilingan 1: 1 menunjukkan peningkatan yang nyata dibandingkan asiklovir murni. Hal ini juga dapat dilihat dari hasil perhitungan statistik  menggunakan analisis varian satu arah  SPSS 17.

Biocidal activity of curcumin and cationic polymer possessing composites

2020 ◽  
Vol 35 (4-5) ◽  
pp. 389-398
Author(s):  
Tarık Eren ◽  
Gülay Baysal ◽  
Faik Doğan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Curcuma Longa ◽  
Antibacterial Properties ◽  
Fourier Transform Infrared ◽  
Diffusion Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

There is a growing interest in new type of biocidal compounds with antibacterial properties against bacteria. In this study, new antibacterial synthetic materials bearing curcumin and cationic polymers were synthesized. In the synthesis stage, the methacrylate functional cationic monomer was synthesized via the Michael addition route by using 3-acryloxy-2-hydroxypropyl methacrylate and 3-amino pyridine to obtain Monomer 1. Monomer 1 was further quaternized with hexyl bromide to obtain a cationic methacrylate functional monomer. Free-radical polymerization of Monomer 1 and methyl acrylate was conducted in the presence of azobisisobutyronitrile under dimethylformamide solvent. The composite formulation was conducted by using turmeric extract Curcuma longa (curcumin), hydroxyapatite, montmorillonite, and silver nitrate. The materials were analyzed by using the methods of X-ray diffraction, nuclear magnetic resonance, Fourier transform infrared spectroscopy, and scanning electron microscopy. The biocidal activities against the bacteria Escherichia coli, Listeria monocytogenes, Salmonella, and Staphylococcus aureus were analyzed using agar well diffusion method. From the Fourier transform infrared, X-ray diffraction, and scanning electron microscopy analysis results of the synthesized nanocomposites, it is seen that they form strong connections with the components added to the composites and form an exfoliated structure. According to the antibacterial analysis results, the nanocomposites obtained have showed a strong antibacterial resistance against E.coli, L.monocytogenes, Salmonella, and S. aureus bacteria, and the high inhibition zone areas were obtained.

Ethylenediamine Processed Cu2SnS3 Nano Particles via Mild Solution Route

2016 ◽  
Vol 19 (1) ◽  
pp. 001-005 ◽  
Author(s):  
Paul Nesamony Prathiba Jeya Helan ◽  
Kannusamy Mohanraj ◽  
Sethuramachandran Thanikaikarasan ◽  
Thaiyan Mahalingam ◽  
Ganesan Sivakumar ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Fourier Transform Infrared ◽  
Nano Particles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electron Microscopy Analysis ◽  
Microscopy Techniques ◽  
Scanning Electron

Copper tin sulphide nanoparticles have been prepared by solution growth technique at various ethylenediamine concentrations. Prepared samples have been characterized using x-ray diffraction, fourier transform infrared, Raman and scanning electron microscopy techniques. x-ray diffraction results revealed that the prepared samples are nanocrystalline in nature with tetragonal structure. Fourier transform infrared spectroscopy analysis results showed the presence of Cu-O, Sn-O and Sn-S vibrations in the wavenumber range between 450 and 620 cm-1. Vibrational symmetry of prepared samples have been analyzed using Raman spectroscopy. Scanning electron microscopy analysis indicated the formation of flower like nanocrystals for samples prepared at various Ethylenediamine concentrations.

Regeneration of the Brewing Spent Diatomite

2014 ◽  
Vol 998-999 ◽  
pp. 1425-1428 ◽  
Author(s):  
Wen Ya Mei ◽  
Teng Hong Hui
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Surface Area ◽  
Fourier Transform Infrared ◽  
X Ray Diffraction ◽  
X Ray ◽  
Remarkable Increase ◽  
Efficient Adsorbent ◽  
Scanning Electron

Brewing spent diatomite (BSDT), a beer industrial by-product, was regenerated with calcination. The characteristics of regenerated BSDT were detected by X-ray diffraction, X-ray fluorescence, Fourier-transform infrared, and scanning electron microscopy. The results showed that the mineralization of the surface adsorbate and the remarkable increase in the Si-OH decreased the pHpzc value from 7.6 to 5.2 and increased the surface area from 36 m2/g to 52 m2/g after calcination at 800 °C. The results show that the regenerated BSTD could be employed as an efficient adsorbent for the recycling of BSDT.

scholarly journals Sintesis dan Karakterisasi Selulosa Bakteri Tercangkok Poliakrilonitril dan Teramidoksimasi Menggunakan Teknik Pra-iradiasi

2016 ◽  
Vol 11 (1) ◽  
pp. 1 ◽  
Author(s):  
Oktaviani Oktaviani ◽  
Emil Budianto ◽  
Sugiarto Danu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Fourier Transform Infrared ◽  
Acetobacter Xylinum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thermal Gravimetry ◽  
Scanning Electron

Penelitian ini bertujuan untuk mempelajari kopolimerisasi cangkok akrilonitril pada selulosa bakteri (SB) dengan inisiasi radiasi serta penambahan hidroksilamin untuk menghasilkan gugus amidoksim. Pencangkokan akrilonitril pada SB diharapkan dapat meningkatkan ketahanan termal SB. Sedangkan SB yang bersifat sebagai pengkelat ion-ion logam berat, diharapkan dapat dihasilkan melalui penambahan hidroksilamin. Film selulosa bakteri telah berhasil dibuat dari air kelapa yang diinokulasi dengan bakteri Acetobacter xylinum. Film selulosa bakteri (SB) selanjutnya diiradiasi dengan berkas elektron pada rentang dosis 15-120 kGy, laju dosis 15 kGy/pass pada suhu 30 + 1 0C. Setelah diiradiasi, SB tersebut dikopolimerisasi cangkok dengan monomer akrilonitril. Kondisi optimum untuk kopolimerisasi cangkok akrilonitril pada SB adalah pada dosis 75 kGy, suhu 600C, waktu 3 jam, dan konsentrasi akrilonitril 30% b/b. Derajat pencangkokan tertinggi yang diperoleh adalah 56,03 %. Selulosa bakteri tercangkok akrilonitril (SB tercangkok PAN) selanjutnya diamidoksimasi. Amidoksimasi dilakukan dengan penambahan hidroksilamin hidroklorida 6 % b/v dalam pelarut metanol:air = 50:50 v/v pada pH 7, dan diperoleh waktu optimum selama 2 jam dengan densitas gugus amidoksim sebesar 5,425 mmol/ g. Hasil karakterisasi dengan Fourier Transform Infrared (FTIR) menunjukkan adanya spektrum spesifik gugus siano setelah proses pencangkokan akrilonitril pada SB dan intensitasnya menurun setelah diamidoksimasi. Hal tersebut diperkuat dengan hasil uji Scanning Electron Microscopy (SEM) yang memperlihatkan adanya gugus siano yang menempel setelah pencangkokan, dan gugus tersebut tidak terlihat lagi setelah amidoksimasi. Dari hasil uji dengan X-ray Diffraction (XRD), indeks kristalinitas SB tercangkok PAN akan semakin rendah dengan meningkatnya derajat pencangkokan dan pengujian dengan Thermal Gravimetry Analysis (TGA) menunjukkan bahwa ketahanan panas SB tercangkok PAN meningkat.

scholarly journals Preparation and Properties of Thick Film Resistors Containing Cadmium Glasses and Cadmium Oxide

1980 ◽  
Vol 7 (1-3) ◽  
pp. 29-33
Author(s):  
R. Kužel ◽  
J. Broukal
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Differential Thermal Analysis ◽  
Electrical Properties ◽  
Cadmium Oxide ◽  
X Ray Diffraction ◽  
Temperature Coefficient Of Resistance ◽  
X Ray ◽  
Scanning Electron

The electrical properties of resistors comprising finely divided CdO and cadmium glass, were investigated. The change in a temperature coefficient of resistance from about −500 ppm/℃ to +70 ppm/℃ was realized by addition of a further component to the resistor paste. Differential thermal analysis, X-ray diffraction analysis and scanning electron microscopy were used for studying crystalline phases in glass containing CdO.

Microstructure Similarities between Phases F and U in Al-Pd-Co Alloys

2016 ◽  
Vol 258 ◽  
pp. 440-443
Author(s):  
Ivona Černičková ◽  
Marek Adamech ◽  
Libor Ďuriška ◽  
Marian Drienovský ◽  
Dusan Janičkovič ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Differential Thermal Analysis ◽  
Energy Dispersive ◽  
Eutectoid Transformation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Co Alloys ◽  
Scanning Electron

The work is aimed at searching for compositionally variant isostructural mutations of the cubic F-phase in both as-annealed (850°C/500 h) and DTA-cooled conditions of the Al72Pd9Co19 alloy. Recently, the mutations were reported for the U-phase in the Al69.8Pd13.8Co16.4 alloy annealed at 700°C for 2000 h. In the investigation, scanning electron microscopy including energy dispersive X-ray spectroscopy, powder X-ray diffraction, and differential thermal analysis (DTA) were used. Two isostructural mutations of the F-phase, FL (the product of L-parent) and FV (the product of V-parent), were identified (symbol L stands for liquid). On DTA-cooling, the bivariant heterogeneous transition (Lpart→V), the monovariant heterogeneous transformation (Lrest→V+FL), and the monovariant quasi-eutectoid transformation (Vrest→Al5Co2+FV) were recorded.

Sign in / Sign up

Export Citation Format

Share Document