STUDI KEKUATAN ADHESI DAN APATITE INDUCTION ABILITY PADA PELAPISAN HYDROXYAPATITE PADA TITANIUM

Metallic biomaterials (titanium and titanium alloys) have been widely employed in many load-bearing orthopaedic applications, as they have excellent mechanical properties and corrosion stability. However, soaring problems such as a lack of direct chemical bonding between the implant and host tissues leading to implant loosening still persist. To prevent this problem, surface modifications such as applying hydroxyapatite onto titanium is necessary. The aim of this study is to investigate and to compare the bond strength and apatite induction ability of the hydroxyapatite coated titanium

Effect of Apple Dregs Mass and Processing Time on Pectin Extraction from Apple Dregs

Apples have the opportunity to develop their potential to the fullest. In the process of taking apple cider, apple dregs will be obtained. The dregs can be further processed or extracted to obtain pectin. This research was conducted to determine the optimum extraction time and mass to produce pectin from apple dregs. The experimental procedure includes raw material preparation, extraction, distillation, drying, and yield analysis. The method used is solid-liquid extraction using ethanol solvent. Time and mass of apple dregs and temperature according to the changing variables that have been determined, namely for the variable extraction time 120 minutes, 150 minutes, and 180 minutes, while the mass of dry apple dregs was 65 grams, 70 grams, and 75 grams while the operating temperature remained 70°C and the precipitating agent used is alcohol or 95% ethanol with 50% acetic acid as a solvent, as well as analysis of pectin content by spectrophotometry (UV-VIS). The study results showed the lowest concentration of 0.002 ppm and the lowest absorbance of 0.006 nm. Where the highest concentration is 2.5 ppm, and the highest absorbance is 0.241 nm, a calibration curve is formed linearly where y = 0.0936x + 0.0111 and R2 = 0.9931. From the results of the graphical analysis of the relationship between the effect of concentration and mass on time in the apple dregs pectin extraction process, the highest concentration was 1.9 ppm at mass 70 with a time of 180 minutes, and the lowest concentration was 0.7 ppm at mass 65 with a time of 120 minutes

Effect of Apple Dregs Mass and Processing Time on Pectin Extraction from Apple Dregs

Apples have the opportunity to develop their potential to the fullest. In the process of taking apple cider, apple dregs will be obtained. The dregs can be further processed or extracted to obtain pectin. This research was conducted to determine the optimum extraction time and mass to produce pectin from apple dregs. The experimental procedure includes raw material preparation, extraction, distillation, drying, and yield analysis. The method used is solid-liquid extraction using ethanol solvent. Time and mass of apple dregs and temperature according to the changing variables that have been determined, namely for the variable extraction time 120 minutes, 150 minutes, and 180 minutes, while the mass of dry apple dregs was 65 grams, 70 grams, and 75 grams while the operating temperature remained 70°C and the precipitating agent used is alcohol or 95% ethanol with 50% acetic acid as a solvent, as well as analysis of pectin content by spectrophotometry (UV-VIS). The study results showed the lowest concentration of 0.002 ppm and the lowest absorbance of 0.006 nm. Where the highest concentration is 2.5 ppm, and the highest absorbance is 0.241 nm, a calibration curve is formed linearly where y = 0.0936x + 0.0111 and R2 = 0.9931. From the results of the graphical analysis of the relationship between the effect of concentration and mass on time in the apple dregs pectin extraction process, the highest concentration was 1.9 ppm at mass 70 with a time of 180 minutes, and the lowest concentration was 0.7 ppm at mass 65 with a time of 120 minutes

Influence of Physicochemical Aspects of Substratum Nanosurface on Bacterial Attachment for Bone Implant Applications

Biofilm formation on implant materials is responsible for periprosthetic infections. Bacterial attachment is important as the first stage in biofilm formation. It is meaningful to understand the influence of nanostructured surface on bacterial attachment. This review discusses the influence of physicochemical aspects of substratum nanosurface on bacterial attachment

STUDI KEKUATAN ADHESI DAN APATITE INDUCTION ABILITY PADA PELAPISAN HYDROXYAPATITE PADA TITANIUM

Metallic biomaterials (titanium and titanium alloys) have been widely employed in many load-bearing orthopaedic applications, as they have excellent mechanical properties and corrosion stability. However, soaring problems such as a lack of direct chemical bonding between the implant and host tissues leading to implant loosening still persist. To prevent this problem, surface modifications such as applying hydroxyapatite onto titanium is necessary. The aim of this study is to investigate and to compare the bond strength and apatite induction ability of the hydroxyapatite coated titanium

Strategi Pengembangan dan Tata Kelola Manajemen Usaha Mandiri “Bakso Wilujeng” di Kelurahan Ketawanggede - Kota Malang

Bakso adalah salah satu usaha kuliner khas Malang yang banyak diminati oleh konsumen dan mempunyai potensi banyak pembeli. Akan tetapi pemilik mengalami masalah dalam produksi bakso karena masih menggunakan cara cetak manual menggunakan tangan. Oleh karena itu, tujuan kegiatan PkM ini adalah membantu mengembangkan produksi usaha UMKM bakso dengan memperbaiki kualitas proses produksi, manajemen keuangan dan pemasaran yang diharapkan dapat meningkatkan daya jangkau pemasaran mitra yang lebih luas, sehingga pendapatan mitra akan bertambah. Metode yang dilakukan adalah melakukan observasi untuk mengetahui permasalah mitra, menyusun tahapan dan teknik penyelesaian masalah, pelaksanaan dan evaluasi kegiatan. Setelah melakukan rangkaian kegiatan pengabdian masyarakat, mitra mendapatkan bantuan alat pencetak bakso, proses pencetakan adonan bakso lebih cepat 35 menit dari sebelumnya, dapat mengelola keuangan dengan memanfaatkan aplikasi keuangan, memahami pentingnya hygiene sanitasi produk makanan, serta meningkatkan promosi di media sosial. Berdasarkan hasil kegiatan pengabdian kepada masyarakat ini mitra menjadi lebih terbantu dengan adanya alat pencetak bakso karena lebih efisien waktu dan lebih higienis, serta dapat membuat laporan keuangan usaha secara otomatis menggunakan aplikasi keuangan

Fabrication of Ti14Nb4Sn alloys for bone tissue engineering applications

In this paper, porous Ti14Nb4Sn alloys were fabricated using a space holder sintering method, resulting in a porosity of ~70%. Scanning electron microscopy (SEM) analyses revealed a combination of both macropore and micropore structures. The fabricated titanium alloy scaffolds exhibited a similar structure to that of natural bone, which is expected to improve bone implant longevity. Bacterial cells of Pseudomonas aeruginosa ATCC 9027 were employed for the in vitro test

Fabrication of Ti14Nb4Sn Alloys for Bone Tissue Engineering Applications

In this paper, porous Ti14Nb4Sn alloys were fabricated using a space holder sintering method, resulting in a porosity of ~70%. Scanning electron microscopy (SEM) analyses revealed a combination of both macropore and micropore structures. The fabricated titanium alloy scaffolds exhibited a similar structure to that of natural bone, which is expected to improve bone implant longevity. Bacterial cells of Pseudomonas aeruginosa ATCC 9027 were employed for the in vitro test

Fabrication and surface modifications of titanium alloys for bone implant applications

Abstract not included

Perancangan Alat Reaktor Alir PipaVertikal(Plug Flow Reactor)dengan Buffle untuk pembuatan Biodiesel secara Kontinyu dengan perubahan Suhu

Biodiesel adalah bahan bakarmesin diesel yang tesusun dari ester alkil asam lemak. Biodiesel dihasilkan dengan mereaksikan minyak nabati dengan alkohol melalui reaksi trans-esterifikasi berkatalis dengan hasil samping gliserol. Pada penelitian yang dilakukan proses produksi menggunakan reaktor kontinyu (Plug Flow Reactor) yang telah dirancang dimana proses pencampuran dan pengadukan antara bahan baku utama biodiesel dengan katalis berlangsung secara terus-menerus dengan selang waktu dan suhu tertentu..Di dalam reaktor yang dirancang terdapat baffleatau pengaduk. Pengadukini berfungsi untuk memperluas kontak permukaandan menghasilkan turbulensi yang tinggi sehingga dapat mencegah tubebergetar. Plug Flow Reactor digunakan karena memiliki efisiensi yang tinggi dibandingkan Reactor Alir Tanpa Pengaduk. Untuk menguji alat yang telah dibuat dilakukan penelitian dengan bahan baku minyak biji randu yang direaksikan dengan methanol dan katalis basa (KOH).Minyak biji randu dimanfaatkan sebagai bahan baku karena merupakan minyak non pangan yang memiliki kemampuan untuk dirubah menjadi biodiesel. Variabel yang diberikan adalah suhu reaksi 40⁰C, 50⁰Cdan 60⁰C. Karakteristik biodiesel terbaik dari minyak biji randu dihasilkan pada variabel ratio mol methanol terhadap mol minyak 6:1 dengan suhu 600C yaitu: % FAME 95.70 %, berat jenis 0.882gr/ml, dan titik nyala 136⁰C