Pengaruh Temperatur Penyimpanan Terhadap Mutu dan Kualitas Minyak Goreng Kelapa Sawit

The MGKS storage temperature can cause changes in the percentage of free fatty acids (FFA), peroxide number (PV) and oil color so that the quality and quality of the oil decreases. This study aims to comprehensively analyze the factors related to the quality of palm cooking oil based on storage temperature parameters. Titration method is used to determine changes in FFA and PV values, while color determination uses a lovibond tintometer to analyze changes in these parameters based on changes in storage temperature in the range of 18 0C - 36 0C, treatment increases every 2 0C. The average change in the FFA value for every 2 0C increase in the sample Sp.A = 0.1071 %; Sp.B = 0.1097 %; Sp.C = 0.1111 %. Changes in PV of Sp.A samples; Sp.B and Sp.C respectively 1.152 meq/kg; 1.266 meq/kg and 1,352 meq/kg, while the color changes that appear in the three samples are 2.34; 2.46 and 2.67. These results show that every 2 0C increase in MGKS storage temperature affects the quality and quality of the oil. MGKS Sp.A is more stable than samples Sp.B and Sp.C. Changes in the FFA value of the three samples were stable in the temperature range 18 0C - 36 0C. Changes in the FFA value of the three samples were stable in the temperature range of 18 0C - 36 0C. Sp.A samples are more stable in maintaining PV values and color against changes and increases in storage temperature compared to Sp.B and Sp.C.

Recycling Temple Waste into Organic Incense as Temple Environment Preservation in Bali Island

Kegiatan upacara di tempat suci pura di Pulau Bali rata-rata menghasilkan sampah sekitar 2000 L/hari. Sebagai bagian yang sangat penting dari budaya Bali, sesajen yang terdiri dari bunga, daun, buah-buahan dan bambu disajikan di setiap upacara keagamaan. Pembuangan sampah pura yang tidak tepat berpotensi menimbulkan gangguan pada kehidupan manusia dan lingkungan, seperti air dan sanitasi, penumpukan sampah, peningkatan tingkat pencemaran, dan kesehatan manusia. Penelitian ini bertujuan untuk mendaur ulang sampah pura, khususnya sisa bunga menjadi dupa organik serta mengkaji alternatif lain dalam daur ulang sampah pura. Daur ulang sisa bunga menjadi dupa organik dilakukan dengan menggunakan tiga bahan campuran. Kajian literatur digunakan untuk menambah informasi alternatif daur ulang sampah pura dari penelitian sebelumnya. Hasil eksperimen menunjukan bahwa sampah sisa bunga dapat didaur ulang menjadi dupa organik. Rasio campuran 1:2 untuk sisa bunga dan bubuk esensial memberikan hasil terbaik. Dupa organik yang terbentuk sangat kuat dan padat. Selain itu, aroma campuran yang dihasilkan lebih baik di antara yang lain. Sampah pura juga dapat didaur ulang menjadi beberapa produk berharga, seperti kompos, ekstrak warna minyak atsiri, bubuk warna, atau biogas. Diestimasikan sebuah pura menghasilkan sekitar 200 kilogram sampah pura dalam satu hari upacara. Sekitar 40% dari sampah pura merupakan sisa bunga (berat basah) dengan kadar air sekitar 80%. Setelah melalui proses pengeringan, sisa bunga mencapai 16 kilogram. Diperkirakan sekitar 45 ton sampah pura dari 230 pura publik di Pulau Bali dapat didaur ulang setiap tahun melalui upaya daur ulang. Beberapa dampak yang ditimbulkan dari upaya daur ulang ini, seperti mengurangi sampah pura, menciptakan produk daur ulang yang dapat dipasarkan, dan meningkatkan keharmonisan antara budaya, lingkungan, dan masyarakat melalui pemberdayaan masyarakat. ABSTRACTCeremonial’s activities in Bali’s Temple have produced about 2000 L/day of waste in average. As an integral part of Balinese culture, devotion offerings which consists of flowers, leaves, fruits and bamboo are presented at every ceremony. The improper disposal of temple waste potentially causes a stress on the basic services in human life, such as water and sanitation, waste accumulation, raising the level of pollution, and human health. The present study aims to leverage of temple waste, especially discarded flower into organic incense through recycling and find out the foreseen impact of this initiative to the environment. Processing discarded flower into organic incense was conducted in this research with three material mixtures ratio. A literature review was added to enhance the alternatives of discarded flowers recycling on previous research. It is found that discarded flower was successfully recycled into organic incense. The preliminary experiments showed that the ratio of 1:2 for discarded flowers and essential powder gave the best results. The incenses were very strong formed and solid. Additionally, the smell of best mixture was the best among others. Besides, temple waste can be recycled to some valuable products, such as vermicompost, dyes extraction, essential oil, color powder, or biogas. It assumed that a temple has produced around 200 kilograms of temple waste during a ceremonial day. About 40% of those was discarded flowers (wet weight) that 80% contains water. After the drying process, it has left 16 kilograms of dried discarded flowers. It estimated around 45 tons of discarded flowers from 230 public temples around Bali could be recycled every year through this recycling effort. Some impacts come up with following this initiative, such as reducing the temple waste, creating a marketable recycling product, and build up a harmony between the cultural, environment, and society through community empowerment.

Uji Antioksidan Belimbing Wuluh dan Ampas Nanas Terhadap Kualitas Minyak Goreng Habis Pakai

Anti-Oxidant Tests of starfruit and pineapple pulp on the quality of Used Cooking Oils ABSTRACTUsed Cooking Oil is oil produced from frying residue and is carcinogenic because it causes oxidation, hydrolysis, and polymerization to produce toxic peroxides and free fatty acids that are difficult for the body to digest. Measurement of oil quality can be measured through 3 parameters, namely, the peroxide number, the acid number and the oil color. Efforts to control the quality of cooking oil are the addition of natural antioxidants, starch wuluh and pineapple pulp. Starfruit contains flavonoids, terpenoids, phenols and pectins as well as Vitamins C and A which can absorb free radicals in oil. Meanwhile, pineapple pulp contains high levels of vitamin C, flavonoids and polyphenols which can eat free radicals. This Research aims to determine the differences in the antioxidant power of starfruit and pineapple pulp to maintain the quality of used cooking oil. This research is experimental, which will study the antioxidant power of starfruit and pineapple pulp at the acid number, peroxidant and color intensity of used cooking oil. 3 grams of dry starfruit and 0.4 grams of dried pineapple pulp are added to each pad 100 mL of used cooking oil. The application of starfruit and pineapple pulp in used cooking oil had a significant effect on the 3 oil quality parameters, namely the acid number, the peroxide number and the oil color intensity, with a significance value of P <0.05. This is because the antioxidant content and composition of the two ingredients are different. Wuluh starfruit in the addition of 3 grams provides a fairly large antioxidant effect, while pineapple pulp at a concentration of 0.4 grams has shown anti-oxidant power so a higher concentration is needed to produce optimal antioxidant power. Keywords: Antioxidants, Starfruit, Pineapple Dregs

The Degree of Polymerization in a Prediction Model of Insulating Paper and the Remaining Life of Power Transformers

The aging of power transformers causes several defects and damages in the insulating system, especially in the insulating paper. The degradation of the insulating paper generates dissolved gases in the insulating oil, which are measured by gas chromatography and used as an indicator of the insulation status. The state of the insulating paper can be identified based on the degree of polymerization (DP) measurement. In some cases, when the measurement of DP is difficult, estimating DP can be accomplished through gathering information about some of the testing parameters, such as the dissolved gases (DGA), breakdown voltage (BDV), oil interfacial tension (IF), oil acidity (ACI), moisture content (MC), oil color (OC), dielectric loss (Tan δ), and furans concentration specifically (2-furfuraldhyde (FA)). The statistical tools (correlation and multiple linear regression), based on 131 transformer samples, can be used to build a relation linking DP and one or more of the previous parameters to identify the insulating paper status and the percentage of remaining life of the transformer. The results indicated that it is difficult to build a mathematical model to relate between the DP and the testing variables, except with FA, where the trend of DP with FA is more obvious than with other variables. The empirical formula to compute DP based on the FA concentration was developed and gave promising results to compute DP and the remaining life of the power transformers.

The effect of paint types toward iris color changes of ocular prosthetics

Ocular prosthetics are mainly created to meet the aspect of esthetic consideration. The paint application in ocular prosthetics construction is remaining an option for Prosthodontist. This study aims to examine the effect of types of paint toward iris color change of the ocular prosthetics. Three black types of paint: oil paint (Maries Oil Color, China), automotive paint (Avian, Indonesia), and acrylic paint (Sakura, Japan) were used to paint paper disc to produce 27 iris ocular prosthetics. Chromameter was used to examine the first and the final color after acrylic processing using themicrowave. The measurement results in the process using Commission Internationale de l’Eclairage. One-way ANOVA test showed significant differences between the three types of paints on ocular prosthetics (p<0.05). The LSD test revealed that oil paint groups had more significant results than the automotive paint group and acrylic paint group, while the automotive paint group did not have significant differences with the acrylic paint group (p>0.05). Thus, it is conclusive that oil paint influences the iris color change of the ocular prosthetics.

Chemical and Physical Characteristics of Cooking Oil After Tempeh Frying

This study aims to determine the effect of seasoning and type of oil on chemical and physical characteristics of cooking oil after being used for tempeh frying. This factor needs to be learned to understand how to handle it. The experimental design used in this study was a factorial completely randomized design with two treatments, namely, (A) Seasoning consisting of (A1) No Seasoning and (A2) Seasoning. The second treatment is the type of oil (B) consisting of: (B1) bulk oil, (B2) GM oil, (B3) Sunco oil. The experiment was repeated 3 times so that 18 experimental units were obtained. The parameters measured were free fatty acid levels, oil color and water content. The results showed that seasoning and type of oil affect the levels of free fatty acids, oil color and water content. The highest free fatty acid levels were obtained from seasoned tempe frying using bulk oil of 1.53%. The yellowest oil color and the highest water content obtained from seasoning tempeh frying using bulk oil of 32.07 and 0,06%.

PERANCANGAN ALAT PENDETEKSI KELAYAKAN OLI PADA KENDARAAN SEPEDA MOTOR BERBASIS ARDUINO UNO ATMEGA328

AbstrakPada kendaraan bermotor pelumasan adalah suatu hal yang sangat penting. Pelumasan berfungsi untuk melumasi komponen logam atau metal yang bergesekan dalam mesin. Untuk menjaga performa mesin kendaraan tetap prima maka kita harus cermat dalam memilih jenis oli yang akan digunakan menurut tingkat kekentalan oli yang dibutuhkan oleh kendaraan yang kita gunakan. Selain itu pemeriksaan dan pergantian oli secara berkala berperan penting dalam menjaga awetnya mesin kendaraan.Untuk membantu dalam pengecekan oli bagi para pemilik kendaran bermotor dalam hal ini sepeda motor dalam itu peneliti merancang sebuah alat pendeteksi kelayakan oli pada kendaraan sepeda motor. Perubahan nilai resistansi dari sensor IR (Infrared Resistor) setelah menerima pantulan cahaya dari LED (Light Emitting Diode) yang diletakkan diatas permukaan oli menyebabkan tegangan yang diterima Arduino Uno microcontroller ATmega328 membaca perubahan warna oli pada sebuah baki oli sepeda motor. Kata kunci : Pengecekan oli, Pantulan cahaya LED, Arduino Uno AbstractLubrication in motor vehicles is important, lubrication is not only serves to lubricate metal or metal touching or friction in the machine. To maintain the performance of the vehicle's engine is prime, we must carefully select the type of oil to be used according to the oil viscosity level required by the vehicle we use. In addition, inspection and oil change periodically play an important role in maintaining the vehicle's crew.To assist in oil checking for motorised owners in this motorcycle in this case the author devised an oil feasibility detection tool on a motorcycle vehicle. Changes in resistance value from IR sensor (Infrared Resistor) after receiving light reflection from LED (Light Emitting Diode) that is placed above the oil surface causing the received voltage Arduino Uno Microcontroller ATmega328 Read the changes Oil color on a motorcycle oil tray. Keywords: Oil checking, LED light reflection, Arduino Uno