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All Journal Jurnal Keramik dan Gelas Indonesia Jurnal Keramik dan Gelas Indonesia Neraca Manajemen, Akuntansi, dan Ekonomi
Herlina Damayanti
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Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology

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Modification of Monetite Formation by Controlling of Phosphoric Acid Addition Herlina Damayanti; Karlina Noordiningsih; Kristanto Wahyudi
Jurnal Keramik dan Gelas Indonesia Vol 29, No 2 (2020): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v29i2.6712

Abstract

Development of synthetic biomaterials has been done to repair bones and teeth damaged. Monetite is a biomaterial currently being developed for tissue engineering especially bone and dental applications because it has superior osteoconductive, biodegradable and regeneration properties. This research successfully produced the mineral monetite by modification of wet precipitation method with controlling the rate of phosphoric acid addition to calcium hydroxide. The reaction temperature is around 30oC - 65oC and the pH of the solution about 3. The final product from this precipitation process was characterized by XRD for testing mineral content, XRF for testing chemical content, and also SEM for knowing the morphology of product. The results showed that the optimal condition for monetite formation was D2, with controlling of the phosphoric acid rate ¼ mL/second for 2 hours and increased to ½ mL/second for 1 hour. The reaction temperature in the range 34 oC - 50oC and pH 3. The diffraction pattern from XRD test results showed monetite peaks at the following 2θ angle: 13.1; 26.4; 30.2; and 32.9 with the highest intensity (D2) is 4500. Also, the morphology of the crystalline structure approximates the actual monetite crystal, which is like a plate with a width of a particle about 1-3 µm. Thus, the results of this research provide an opportunity further research of the application monetite for tissue and dental engineering materials
X-Ray Diffraction Characterization of Hydroxyapatite Crystal Modified with MgCO3 and CaCO3 Ayu Ratnasari; Herlina Damayanti; Kristanto Wahyudi
Jurnal Keramik dan Gelas Indonesia Vol 28, No 2 (2019): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v28i2.5781

Abstract

Modifikasi kristal hidroksiapatit yang sudah dihasilkan Balai Besar Keramik (BBK) dengan kalsium karbonat dan magnesium karbonat dilakukan dengan metode drymechanochemical. Metode ini hanya memanfaatkan energi kecil yang dihasilkan dari giling mekanik. Campuran digiling kering kemudian dikarakterisasi dengan X-Ray Diffraction (XRD). Puncak kalsium karbonat masih terbentuk dari hasil XRD karena ikatannya sangat kuat sehingga tidak dapat masuk ke dalam kristal hidroksiapatit. Modifikasi dengan magnesium karbonat menunjukkan bahwa ada puncak MgO, dimana ikatan antara magnesium dan karbonat terpecah. Variasi waktu giling dilakukan dari 12, 24, 36, dan 48 jam. Didapatkan bahwa pada waktu giling 48 jam, ikatan magnesium karbonat lepas secara optimum dilihat dari puncak XRD yang terbentuk.  Kata Kunci: hidroksiapatit, x-ray diffraction, drymechanochemical
Modification of Monetite Formation by Controlling of Phosphoric Acid Addition Herlina Damayanti; Karlina Noordiningsih; Kristanto Wahyudi
Jurnal Keramik dan Gelas Indonesia Vol 29, No 2 (2020): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v29i2.6712

Abstract

Development of synthetic biomaterials has been done to repair bones and teeth damaged. Monetite is a biomaterial currently being developed for tissue engineering especially bone and dental applications because it has superior osteoconductive, biodegradable and regeneration properties. This research successfully produced the mineral monetite by modification of wet precipitation method with controlling the rate of phosphoric acid addition to calcium hydroxide. The reaction temperature is around 30oC - 65oC and the pH of the solution about 3. The final product from this precipitation process was characterized by XRD for testing mineral content, XRF for testing chemical content, and also SEM for knowing the morphology of product. The results showed that the optimal condition for monetite formation was D2, with controlling of the phosphoric acid rate ¼ mL/second for 2 hours and increased to ½ mL/second for 1 hour. The reaction temperature in the range 34 oC - 50oC and pH 3. The diffraction pattern from XRD test results showed monetite peaks at the following 2θ angle: 13.1; 26.4; 30.2; and 32.9 with the highest intensity (D2) is 4500. Also, the morphology of the crystalline structure approximates the actual monetite crystal, which is like a plate with a width of a particle about 1-3 µm. Thus, the results of this research provide an opportunity further research of the application monetite for tissue and dental engineering materials
X-Ray Diffraction Characterization of Hydroxyapatite Crystal Modified with MgCO3 and CaCO3 Ayu Ratnasari; Herlina Damayanti; Kristanto Wahyudi
Jurnal Keramik dan Gelas Indonesia Vol 28, No 2 (2019): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v28i2.5781

Abstract

Modifikasi kristal hidroksiapatit yang sudah dihasilkan Balai Besar Keramik (BBK) dengan kalsium karbonat dan magnesium karbonat dilakukan dengan metode drymechanochemical. Metode ini hanya memanfaatkan energi kecil yang dihasilkan dari giling mekanik. Campuran digiling kering kemudian dikarakterisasi dengan X-Ray Diffraction (XRD). Puncak kalsium karbonat masih terbentuk dari hasil XRD karena ikatannya sangat kuat sehingga tidak dapat masuk ke dalam kristal hidroksiapatit. Modifikasi dengan magnesium karbonat menunjukkan bahwa ada puncak MgO, dimana ikatan antara magnesium dan karbonat terpecah. Variasi waktu giling dilakukan dari 12, 24, 36, dan 48 jam. Didapatkan bahwa pada waktu giling 48 jam, ikatan magnesium karbonat lepas secara optimum dilihat dari puncak XRD yang terbentuk.  Kata Kunci: hidroksiapatit, x-ray diffraction, drymechanochemical
ANALISIS PENGAMBILAN KEPUTUSAN DALAM KENDALA DI UMKM NASI TUTUG ONCOM “JELETOT” Azka Nurazizah; Herlina Damayanti; Maulina Silvia Hermawati; Regita Putri Alwi Cahayani; Ujang Suherman
Musytari : Jurnal Manajemen, Akuntansi, dan Ekonomi Vol. 13 No. 6 (2024): Musytari : Jurnal Manajemen, Akuntansi, dan Ekonomi
Publisher : Cahaya Ilmu Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.8734/musytari.v13i6.9733

Abstract

Penelitian ini bertujuan untuk menganalisis pengambilan keputusan dalam menghadapi kendala di Usaha Mikro Kecil dan Menengah (UMKM) Nasi Tutug Oncom "Jeletot". Metode yang digunakan adalah pendekatan kualitatif, serta pengumpulan data dilakukan melalui wawancara mendalam, observasi, dan diskusi terfokus dengan pemilik usaha. Hasil penelitian menunjukkan bahwa kendala yang dihadapi mencakup manajemen tenaga kerja, pengelolaan modal, dan pemasaran. Usaha tersebut dikelola secara mandiri, yang mengakibatkan tantangan dalam efisiensi operasional serta pencatatan keuangan yang masih tradisional. Selain itu, pengadaan bahan baku yang tidak stabil mempengaruhi kualitas produk. Penelitian ini menyimpulkan bahwa penerapan inovasi dalam manajemen, pemasaran yang lebih agresif, dan kerja sama dengan penyedia bahan baku tetap akan membantu meningkatkan daya saing UMKM. Implikasi dari penelitian ini memberikan pemahaman bagi pelaku UMKM untuk menerapkan teknik pengambilan keputusan yang lebih efektif dalam menghadapi kendala yang ada.
Co-Authors Ayu Ratnasari Azka Nurazizah Karlina Noordiningsih Kristanto Wahyudi Maulina Silvia Hermawati Regita Putri Alwi Cahayani Ujang Suherman