23 research outputs found
Mixing of acacia bark and palm shells to increase caloric value of palm shells white charcoal briquette
No full textShort Communication: The clay nanoparticle impregnation for increasing the strength and quality of sengon (Paraserianthes falcataria) and white meranti (Shorea bracteolata) timber
No full textAlex T, Winarni B, Kusuma IW, Arung ET, Budiarso E. 2017. Short Communication: The clay nanoparticle impregnation for increasing the strength and quality of sengon (Paraserianthes falcataria) and white meranti (Shorea bracteolata) timber. Nusantara Bioscience 9: 107-110. The clay nanoparticle impregnation for increasing the strength and quality of sengon (Paraserianthes falcataria) and white meranti (Shorea bracteolata) timber. The clay nanoparticles as a fine particle material dissolved in water was impregnated into the sengon and white meranti timber in order to improve its strength properties. Impregnation is the process of inserting the material dissolved in specific water or liquid in the timber using vacuum tube and air pressure. Materials used in this study were clay nanoparticles and the sample test of sengon (P. falcataria) and white meranti (S.bracteolata) timbers with a size of 2 cm x 2 cm x 40 cm. A total of 30 samples for each type of dried timber were impregnated using clay nanoparticles with a pressure of 60 psi for 2 hours. The results showed that impregnation with clay nanoparticles at concentrations of 5% gave the retention value of sengon and white meranti timber of 22.73 kg.m3 and 24.89 kg.m3, respectively. Wood strength is indicated by the voltage value at the boundary proportion (SPL), modulus of rupture (MOR) and modulus of elasticity (MOE). sengon timber shows the value of SPL, MOR, MOE by 296.57 kg.cm2, 376.36 kg.cm2, and 38027.663 kg.cm2, while the white meranti timber had the value of SPL, MOR, MOE as follows: 623, 32 kg.cm2, 729.69 kg.cm2 and 160.187 kg.cm2. The strength of sengon timber was increased from class V (very low) to class IV (low), whereas white meranti was increased from class IV (low) into class II (strong).</jats:p
The effect of oyster mushroom (Pleurotus ostreatus) powder as prebiotic agent on yoghurt quality
No full text
The effect of temperature and Pasteurization time on Staphylococcus aureus isolates from dairy products
No full textMolecular detection of Staphylococcus aureus resistant to temperature in milk and its products
No full textOptimization of Glued Laminated Timber Production in Pt Samtraco Cahaya Utama Samarinda by Using Lindo Software
No full textThis research aims to find out optimal returns from of Glued Laminated Timber products manufactured by PT Samtraco, whose today’s products include Laminating Block, Finger Joins Laminating, Finger Joins Laminating Boards, Solid and Beams. It also aims to find out the output of the combinations of Glued Laminated Timber manufacturing models so that the production facilities can be used up.This research was located in Loa Buah Village, Sungai Kunjang Sub-district, East Kalimantan. The research findings revealed that in Model I the net optimum returns derived from this manufacturing model can be identified after the gross returns was subtracted by the expenditures of each constraint variable, where its gross optimal returns was US 1 equalsRp. 9800, therefore, its gross returns was Rp 11.929.050.000. After it was deducted by the expenditures with the amount of Rp 10.676.499.750, then the value of its net returns was 1.252.550.250. In Model II, the value of optimal net returns can be determined by identifying the gross optimal returns with the amount of US 1 equals Rp 9.800, therefore, its gross returns was Rp.12.152.000.000. After it was deducted by the expenditures with the amount of Rp. 10.876.040.000, then the value of its net returns was Rp. 1.275.960.000. In Model III, the value of net optimal returns derived from this manufacturing model can be determined after the gross returns was deducted by the expenditures of each constraint variable, where its gross optimal returns was US 1 equals Rp. 9.800, therefore, the gross returns was Rp. 12.681.200.000. After it was deducted by the expenditures with amount of Rp. 11.286.268.000, then the value of its net returns was Rp. 1.349.932.000. Based on the value of optimal returns from each model, raw materials dominated the production cost of lamina wood, reaching 57% in the Model 1,59% in Model 2, and 61% in Model 3, and the subsequent costs including delivery, electricity and labors were below 10% respectively
Implementasi Teknik I/O Interfacing Berbasis Arduino
No full textSerangkaian elektronika modern telah mengembangkan sistemnya dengan menggunakan operasi sistem digital, yang menggunakan sinyal dan besaran digital dalam memberikan penggerak / trigger maupun menghasilkan sinyal / signal generator yang dapat digunakan untuk kelanjutan sistem dalam mata rantai sistem digital dan komputasi. Besaran nilai analog seperti temperatur, tekanan, kecepatan, dan alin sebagainya, yang melibatkan besaran fisis, mampu dikemas dalam sebuah sistem digital, yang masih yang pada umumnya masih bersifat non komputasi. Pengadaan sistem terpadu yang bisa dilakukan untuk menjembatani permasalahan pengolahan data yang terekam dari perangkat elektronik masih memiliki tingkat kesulitan yang tinggi dan pembiayaan yang mahal.Mikrokontroler yang mewakili suatu figur sistem kendali modern telah dikemas hanya dengan mengimplementasikan sebuah chip / rangkaian terpadu, yang kemudian berkembang hingga penggunaan memori dan processor beserta elemen pendukungnya seperti register, AT command, I/O system, dan lain sebagainya. Bahkan hingga pada saat ini, mikrokontroler telah dikemas dalam sebuah modul aktif kit.Hasil penelitian ini adalah pengamatan dan analisa terhadap beberapa teknik antarmuka meliputi perancangan dan pemrograman yang terlibat dalam suatu model sistem kendali. Teknik antarmuka pemrograman perangkat lunak dengan bahasa C jauh lebih mudah dimengerti oleh perancang sekalipun untuk tingkat pemula, dengan diketahuinya struktur dasar yaitu void setup(), void loop() dan beberapa tipe variabel serta konsep percabangan atau kondisional, Sementara itu teknik antarmuka perancangan perangkat keras diperlukan beberapa pengetahuan dasar elektronika dalam hal karakteristik tegangan dan arus dari elemen masukan, yang harus disesuaikan dalam kerangka I/O dari Arduino yang menuntut pengkondisian tegangan dan arus berkisar pada 5-9 volt, dan arus sebesar 500mA
