Hasil Pencarian

Ditemukan 180175 dokumen yang sesuai dengan query

Napitupulu, Elizhabet

Pengaruh Penambahan Fluor dalam Sistem PILP terhadap Perubahan Topografi Dinding Tubulus Dentin dan Persentase Fluoroapatit = Effect of Fluorine Addition in the PILP System on Topographical Changes of the Dentine Tubular Walls and the Percentage of Fluoroapatite

"Latar Belakang: Remineralisasi dentin dapat dicapai melalui beberapa metode, di

antaranya secara Guided Tissue Remineralization (GTR) dalam sistem Polymer-Induced Liquid Precursor (PILP). Remineralisasi secara GTR terbukti dapat meremineralisasi affected dentin dengan membentuk mineral intrafibrillar dan ekstrafibrillar. Melalui sistem PILP, kristal terbentuk dengan ukuran kecil sehingga remineralisasi lebih banyak terjadi secara intrafibrillar. Penambahan fluor dalam sistem PILP diharapkan dapat membentuk kristal fluoroapatit yang berukuran lebih besar dan mampu menyempurnakan remineralisasi hingga ke ekstrafibrillar. Penelitian yang ada selama ini hanya berfokus pada permukaan dentin, sedengkan belum terdapat penelitian untuk membuktikan remineralisasi dengan penambahan fluor yang terjadi pada dinding tubulus dentin. Tujuan: Mengetahui pengaruh penambahan fluor 5ppm dan 25ppm dalam sistem PILP terhadap perubahan topografi dinding tubulus dentin dan persentase fluoroapatit. Metode: Sampel blok dentin terdemineralisasi direndam pada larutan remineralisasi dengan penambahan 5ppm dan 25ppm fluor. Sampel blok dentin kemudian akan dipotong lintang menggunakan metode fraktur lalu diamati dan dianalisis menggunakan uji FE-SEM dan XRD. Hasil: Terjadi perubahan topografi pada dinding tubulus dentin setelah dilakukan remineralisasi melalui proses PILP

dengan penambahan 5ppm dan 25ppm fluor selama 14 hari yang dievaluasi secara deskriptif menggunakan FE-SEM. Hasil analisis XRD menunjukkan tidak ada perbedaan bermakna secara statistik penambahan fluor pada larutan remineralisasi PILP terhadap persentase fasa mineral fluoroapatit, namun secara substansi terjadi

peningkatan persentase fluorapatit. Kesimpulan: Penambahan fluor dalam sistem PILP berpengaruh terhadap perubahan topografi dinding tubulus dentin dan persentase

fluoroapatit.

Background: Dentine remineralization can be achieved through several methods,
including Guided Tissue Remineralization (GTR) in the Polymer-Induced Liquid
Precursor (PILP) system. GTR remineralization has been shown to remineralize
affected dentin by forming intrafibrillar and extrafibrillar minerals. Through the PILP
system, crystals are formed with small sizes so that more remineralization occurs
intrafibrillarly. The addition of fluorine in the PILP system is expected to form larger
fluoroapatite crystals and be able to complete the remineralization to extrafibrillar. Existing research so far has only focused on the dentin surface, although there has been no research to prove remineralization with the addition of fluorine that occurs in the dentine tubule walls. Objective: To determine the effect of adding 5ppm and 25ppm fluorine in the PILP system on changes in the topography of the dentinal tubule walls and the percentage of fluoroapatite. Methods: Demineralized dentine block samples were immersed in remineralization solution with the addition of 5 ppm and 25 ppm fluorine. The dentine block samples will then be cross-sectioned using the fracture method and then observed and analyzed using the FE-SEM and XRD tests. Results: Topographical changes occurred in the dentinal tubule walls after remineralization through the PILP process with the addition of 5ppm and 25ppm fluorine for 14 days which were evaluated descriptively using FE-SEM. The results of the XRD analysis showed that there was no statistically significant difference in the addition of fluorine to the percentage of fluoroapatite mineral phase in the addition of fluorine to the percentage of fluoroapatite, but in substance there was an increase in the percentage of fluorapatite. Conclusion: The addition of fluorine in the PILP system affected the topography of the dentinal tubule walls and the percentage of fluoroapatite."

Jakarta: Fakultas Kedokteran Gigi Universitas Indonesia, 2023

T-pdf

UI - Tesis Membership Universitas Indonesia Library

Supit, James H.

Hubungan kandungan fluor saliva anak dengan karies gigi sulung : kajian pada anak yang mengkonsumsi tablet fluor dan tidak (laporan penelitian)

"ABSTRAK

Penelitian ini dimaksudkan untuk mengetahui apa.kah

dengan mengkonsumsi tablet fluor dapat meningkatkan

kandungan fluor dalam saliva dan untuk mengetahui apa.kah

ada hubungan antara kandungan fluor saliva pada anak yang

mengkonsumsi tablet Flour atau yang tidak.

Penelitian dilakukan secara retrospektif laboratorik

pada sejum1ah 63 anak yang sejak bayi menjadi pasien

dokter spesialis anak di Klinik Elizabeth Pluit Jakarta

Utara. Pengamatan meliputi pemeriksaan status medis pasien

Klinik Elizabeth dan kuesioner perihal keteraturan anak

dalam .aengkonsumsi tablet fluor yang telah diresepkan,

serta pemeriksaan karies gigi sulung dan pengambilan

saliva. Selanjutnya kandungan fluor saliva subyek diuku:r

secara laboratorik dengan menggunakan alat Colorimeter DR-

100 (Model 41100-08 Kit).

Hasil uji analisis membuktikan tidak adanya perbedaan

yang bermakna antara kandungan fluor saliva anak yang

mengkonsumsi tablet fluor dengan yang tidak (t=1,8374;

tablet fluor (dalam hitungan bulan) dengan kandungan fluor

saliva (r=-0,01). Selain itu tidak ditemukan hubungan

yang erat antara kandungan fluor saliva dengan karies gigi

sulung (r=-0,04).

1993

T-Pdf

UI - Tesis Membership Universitas Indonesia Library

Iontoforesis untuk penanganan noninvasif dentin hipersensitif

"Indonesian Journal of Dentistry 2006; Edisi Khusus KPPIKG XIV: 221-223

Hypersensitivity of dentine is a common problem and may occur in a specific tooth, in several teeth, or in one area of the mouth and with various intensity of pain. The most accepted theory related to dentinal hypersensitivity is the hydrodynamic theory. This paper will discuss the iontophoresis with fluor to overcome the problem of hypersensitivity."

Journal of Dentistry Indonesia, 2006

pdf

Artikel Jurnal Universitas Indonesia Library

Bioorganic and medicinal chemistry of fluorine = Chimie bioorganique et medicinale du fluor

"Provides a thorough overview of the role of fluorine in pharmaceutical science and development Includes chapters on fluorinated analogues of natural products, fluorinated amino acids and peptides, and derivatives of sugars classifies marketed and in-development fluorinated pharmaceuticals according to their therapeutic classes."

Hoboken, New Jersey: John Wiley & Sons, 2008

e20375771

eBooks Universitas Indonesia Library

Pavlath, Attila E.

Aromatic fluorine compounds

New York: Reinhold, 1962

547.6 PAV a

Buku Teks Universitas Indonesia Library

Novia Khoirunnisa

Pengaruh nano silver fluoride terhadap viabilitas streptococcus mutans dalam berbagai fase pembentukan biofilm = The effect of nano silver fluoride to the viability of streptococcus mutans in various phases of biofilm formation

"Latar Belakang: Nano Silver Fluoride NSF memiliki efek antibakteri terhadap Streptococcus mutans bakteri penyebab karies.

Tujuan: Menganalisis pengaruh NSF terhadap viabilitas S.mutans dalam berbagai fase pembentukan biofilm.

Metode: Biofilm S.mutans diinkubasi selama 4 jam fase adhesi, 12 jam fase akumulasi aktif dan 24 jam fase maturasi pada suhu 37 C. Ketiga model biofilm dipapar NSF dengan konsentrasi Ag 0,4 F- 2,26, Ag 0,9 F- 2,26, Ag 1,4 F- 2,26, Ag 1,9 F- 2,26 selama 1 jam. Persentase viabilitas dinilai dengan menggunakan MTT assay.

Hasil: Tidak ada perbedaan bermakna p>0,05 antara viabilitas biofilm pada fase adhesi, fase akumulasi aktif, ataupun fase maturasi.

Kesimpulan: NSF mampu menurunkan viabilitas biofilm S.mutans dalam berbagai fase pembentukan.

Background: Nano Silver Fluoride NSF has antibacterial effect against Streptococcus mutans that cause dental caries.
Objective: To analyze the effect of NSF on the viability of S.mutans in various phases of biofilm formation.
Methods: S.mutans biofilm was incubated for 4 hours adherence phase, 12 hours active accumulation phase and 24 hours maturation phase at 37 C then exposed by NSF at concentration Ag 0,4 F 2,26, Ag 0,9 F 2,26, Ag 1,4 F 2,26, Ag 1,9 F 2,26 for 1 hour. The percentage of viability was tested with MTT assay.
Result: Biofilm viability of S.mutans in various phases showed no significant difference p 0,05.
Conclusion: NSF can reduce the viability of S.mutans in various phases of biofilm formation."

Jakarta: Fakultas Kedokteran Gigi Universitas Indonesia, 2016

S-Pdf

UI - Skripsi Membership Universitas Indonesia Library

Cahya Ahmad Trisdianto

Optical transmittance, electrical resistivity and microstructural characteristics of undoped and fluorine-doped tin oxide conductive glass fabricated by spray pyrolysis technique with modified ultrasonic nebulizer

"Fluorine-doped tin oxide (FTO) is one of the conductive glasses that have strategic functions in various important applications, including dye-sensitized solar cell (DSSC). In the current work, the effects of deposition time (5, 10, 20, 30, and 40 minutes) upon the fabrication process of FTO thin film using spray pyrolysis technique with modified ultrasonic nebulizer has been studied in regard to its microstructural, optical, crystallinity, and resistivity characteristics. The variation was also performed by comparing the pure tin chloride precursor and the solution that was doped with fluor (F) at 2 wt% in order to see the doping effect on the properties of thin film. The thin films were characterized using x-ray diffraction (XRD), scanning electron microscope (SEM), ultraviolet-visible (UV-Vis) spectroscopy, and digital multimeter. On the basis of current investigation, it has been found that the best FTO was obtained through the pyrolysis technique of 20-minute deposition time, providing optical transmittance of 74%, a band gap energy (Eg) of 3.85 eV and sheet resistance (Rs) of 7.99 ?/sq. The fabricated FTO in the present work is promising for further development as conducting glass for dye-sensitized solar cell (DSSC)."

Depok: Faculty of Engineering, Universitas Indonesia, 2017

UI-IJTECH 7:8 (2016)

Artikel Jurnal Universitas Indonesia Library

Desain kolom penyerapan gas fluor yan keluar dari UF6 chemical trap

URANIA 16 (1-3) 2010

Artikel Jurnal Universitas Indonesia Library

Dania Putri Arsadini

Sintesis LiNi0.8Mn0.1Co(0.1-x)Mo(x)O2/F Menggunakan Metode Self Combustion Synthesis dan Solid State dan Karakterisasinya untuk Katoda Baterai Ion Litium = Synthesis of LiNi0.8Mn0.1Co(0.1-x)Mo(x)O2/F via Self Combustion Synthesis and Solid State Method and Its Characterization for Lithium Ion Battery Cathode

"Sintesis LiNi0.8Mn0.1Co(0.1-x)Mo(x)O2/F telah dilakukan dengan metode self-combustion synthesis dan solid state untuk membuat katoda baterai ion litium. Sintesis dilakukan dengan melarutkan prekursor LiNO3, Ni(NO3)2.6H2O, Mn(NO3)2.4H2O, Co(NO3)2.6H2O, (NH4)6Mo7O24 dan CH4N2O dengan aquades lalu dipanaskan hingga terbentuk pasta. Selanjutnya dilakukan pemanasan lanjutan pada suhu 500C selama 2 jam dan sintering pada suhu 900C selama 3 jam. LiNi0.8Mn0.1Co(0.1-x)Mo(x)O2 kemudian ditambahkan LiF sebagai sumber fluorin dicampur dengan proses milling dan disintering pada suhu 600C selama 4 jam. Hasil SEM menunjukkan morfologi sampel yang berbeda di mana partikel yang terbentuk berukuran lebih kecil akibat dari penambahan doping molibdenum dan fluorin yang menghambat pertumbuhan partikel. Pengujian kinerja sebagai katoda baterai ion litium dilakukan dengan membuat baterai kemudian dilakukan analisis menggunakan cyclic voltammetry (CV) dan electrochemical impedance spectroscopy (EIS). Berdasarkan hasil analisis CV dengan puncak oksidasi yang berada pada 3,48 V dan puncak reduksi yang berada pada 3,87 V menunjukkan penambahan molibdenum dapat mengurangi transformasi fasa yang merugikan. Adapun hasil dari analisis EIS menunjukkan penambahan molibdenum dapat meningkatkan nilai difusi ion litium dengan nilai konduktivitas yang meningkat dari 0,9 x 10-2 S/cm pada material tanpa doping menjadi 4,36 x 10-2 S/cm pada material dengan doping molibdenum dan fluorin.

The synthesis of LiNi0.8Mn0.1Co(0.1-x)Mo(x)O2 has been carried out using combination of self-combustion synthesis and solid state to synthesize an active material for lithium ion battery cathode. The synthesis was performed by dissolving the precursors LiNO3, Ni(NO3)2.6H2O, Mn(NO3)2.4H2O, Co(NO3)2.6H2O, (NH4)6Mo7O24 and CH4N2O using distilled water and heated to form a paste. Further heating was carried out at 500°C for 2 hours and sintering at 900°C for 3 hours. The obtained LiNi0.8Mn0.1Co(0.1-x)Mo(x)O2 was then added LiF as a fluorine source and mixed using ball-milling process before being sintered at 600°C for 4 hours. The morphology characterized using scanning electron microscope (SEM) showed decreasing particle size due to the addition of molybdenum and fluorine that inhibited particle growth. Its performance as lithium-ion battery cathode was characterized using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The CV analysis showed an oxidation peak at 3.48 V and reduction peak at 3.87 V, as an indication that the addition of molybdenum can reduce phase transformation. The EIS analysis showed that the addition of molybdenum and fluorine may increase the diffusion of lithium ions in which conductivity increased from 0.9 x 10- 2 S/cm in undoped materials to 4.36 x 10-2 S/cm in materials with molybdenum and fluorine doping."

Depok: Fakultas Teknik Universitas Indonesia, 2022

S-pdf

UI - Skripsi Membership Universitas Indonesia Library

Microphase separated structure and surface properties of fluorine containing polyurethanes

"Telah dilakukan pengkajian tentang pengaruh pemberian fluorine terhadap strukturmikro fasa terpisah, dan sifat permukaan serta antarmuka poliuretan (PU). Fluorine dimasukkan ke bagian segmen lunak PU. Struktur fasa terpisah diuji dengan X-ray diffraction and a small angle X-ray scattering. Sedangkan sifat permukaan dan antarmuka dikarakterisasi dengan X-ray photoelectron spectroscopy adan sudut kontak dinamis. Daya rekat juga telah diinvestigasi dengan metode cross-cut tape test dan peel test. Hasil penelitian menunjukkan adanya lokalisasi fluorine di permukaan tanpa ada perubahan yang nyata pada strukturmikro fasa terpisah PU. Dari hasil penelitian juga diketahui bahwa sifat pelepasan PU meningkat seiring dengan kandungan fluorine. Hasil-hasil dari penelitian ini menunjukkan dengan nyata bahwa strukturmikro fasa terpisah dan sifat permukaan PU dapat dikontrol dengan mengatur kandungan fluorine yang dimasukkan ke dalam segmen lunak."

MPI 8:2 (2005)

Artikel Jurnal Universitas Indonesia Library

<< 1 2 3 4 5 6 7 8 9 10 >>

Hasil Pencarian :: Simpan CSV :: Kembali

Hasil Pencarian