The presented proceeding comprises peer-reviewed full-text papers selected from the Unima International Conference on Science and Technology (UNICST) 2022. The conference is conducted in the field of science and technology to focus on the use of natural resources, namely science materials for implementation in the field of applied research and applications in science and technology learning. The scope of the accepted articles is science materials; the fields of biology, physics, chemistry and technology. Furthermore, the implementation of materials science research is carried out in learning both in schools and universities.
Preface
Chapter 1: Materials Science
Improvement of Toughness and Microstructure of High Carbon Steel JIS
G4401/SK5 by Tempering Treatment
Extraction of Silica (SiO2) from White Sand, Sulawesi Island
Characteristics of Disperse Orange 3 Thin Film Produced by PVD Method for
Photonic Application
Characterization of Calcined Lobong Limestone
Chapter 2: Mechanical Engineering and Production Processes
Development of Human Body Temperature Detection System Based on the Internet
of Things with Voice Features
Analysis of Performance Diesel Engine by Using a Mixture of Diesel Fuel and
Coconut Oil
Increasing Price Competitiveness through Efficient Use of Materials with
Upcycle and Patchwork Techniques in the Clothing Production Process
Chapter 3: Environmental Protection
An Analysis of Water Quality of Lake Perintis and Lake Limboto as Irrigation
Water Sources in Gorontalo Province
Metal Analysis of Pb, Fe, Cd with Activated Carbon Material in Tondano
Watershed, East Kombos Area, Manado City
Resistancy of Water Spinach (Ipomea Aquatica Forsk.) Exposed to Lead (Pb)
Chapter 4: Agricultural Technologies
The Effect of Garengpung (Dundubia Manifera) Insect Sound Intensity Level
towards the Growth and Productivity of Rice (Oryza Sativa) Plant
Production of Superior Pigs as Breeding Stocks by Improving Maternal Uterus
and Placental Environment during Pregnancy
Application of the Liquent Quotient Method in Effecting the Selection of the
Cassava Land Location in South Minahasa District
Potential of Papaya Leaf Extract (Carica papaya L.) on Pest Control of
Mustard Plants (Brassica juncea L.)
Micropropagation of Sumatran Frankincense (Styrax Benzoin) Forest Plants
Producing Bioactive Raw Materials for Medicine
Diversity of Taro (Colocasia esculenta) Germplasm in Northern Sulawesi Based
on Phenotypic Characteristics
Chapter 5: Food Production
Development of Colocasia Esculenta L. Schott for Snack Food
Bacteriocin Activity of Lactic Acid Bacteria from Ripe Tome-Tome Fruit
(Flacourtia Inermis) Material
Processing Taro into Flour for Various Desserts in South Minahasa
