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Edumatsains
Published by Universitas Kristen Indonesia
ISSN : 25277642     EISSN : 25277235     DOI : -
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Chemistry Education Mathematics Physics
Jurnal EduMatSains merupakan wadah untuk menampung dan mempublikasikan hasil karya baik berupa hasil penelitian maupun kajian teori yang original dalam ruang lingkup pendidikan matematika dan pendidikan sains (fisika, kimia, biologi) serta ilmu matematika dan ilmu sains (fisika, kimia, biologi) bagi semua civitas academika khususnya dosen, guru, peneliti dan mahasiswa. Jurnal EduMatSains terbit sebanyak dua kali dalam satu tahun (Juli dan Januari). Jurnal EduMatSains diterbitkan Oleh Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia.
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Articles 19 Documents
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Search results for , issue "Vol 7 No 1 (2022): Juli" : 19 Documents clear
POTENSI LIMBAH POPOK BAYI SEBAGAI MATRIKS PENGONTROL PELEPASAN PUPUK UREA PADA TANAMAN CABAI Nurfika Ramdani; Mariaulfa Mustam; Hijrah Amaliah Azis
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 1 (2022): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i1.3454

Abstract

The problem of disposable diaper waste is a serious problem that challenges the environment. Therefore, the researchers sought the utilization of diaper waste in agriculture. Efficiency of fertilizer absorption in plants in the environment by 30-40%, remaining in the air and evaporating into ammonia gas. Utilization of baby diaper waste as a matrix and urea as a filler was carried out in this study. This is expected to be able to control the release of nitrogen in fertilizers in accordance with the amount and amount needed by plants (desorption) and maintain nitrogen requirements in the soil, so that the amount of fertilizer given is more efficient than conventional methods. How the purpose of this research is how to make fertilizer based on diaper waste, determine Nitrogen adsorption capacity into the matrix and determine the fertilizer requirements for growing chilli seedlings. The study was divided into 5 stages, the processing of baby diaper waste; second, the manufacture of urea larvae (fillers); three, filling the filler into the matrix; Rate, determine the Nitrogen adsorption capacity into the matrix; discuss, test on plants. The research results obtained are variations in the contribution of urea used as fillers is 15%. Based on this research, it can be said that diaper waste has the potential to control the release of urea. Furthermore, it can explain the rate of release of urea in chili plants.
NERACA ENTALPI UNTUK PENENTUAN NILAI KALOR PADA BERBAGAI JINTAN HITAM Adilah Aliyatulmuna; H.W. Wijaya; M. Murti; M. Rafli
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 1 (2022): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i1.3760

Abstract

The application of the enthalpy balance in solving the calorific value calculation has substituted the application of equation of DU = m(C)(DT). The energy balance refers to (accumulation) = (total energy entering the system) - (total energy leaving the system) + (heat entering the system) - (work done by the system) + (work to enter mass into the system) - (work to remove mass of the system), which produces an enthalpy balance of DH1m1 =DH2m2 generating several assumptions. The assumptions include: first, the system is in a steady state condition; second, the system work (W) is quite small; and third, neglect (Dng)RT results in internal energy (DU) of the nickel wire, having a value almost equal to the enthalpy from the oxidation reaction of the nickel wire. The application of the enthalpy balance requires data on the enthalpy of combustion from a standard material, such as benzoic acid. The result of the enthalpy balance is the positive capacity of the bomb calorimeter. In determining the heat of a material, the enthalpy balance equation requires the value of the calorimeter capacity. This experiment examines the calorific value of black cumin in the form of oil, seeds, and a mixture with 20% coconut oil. The test results indicate that black cumin oil has the highest calorific value, which is in accordance with the referred literature reporting that black cumin oil has a high calorific value, while dried black cumin or seeds and palm oil have a similarly low calorific value.
DESKRIPSI KEMAMPUAN KOMUNIKASI MATEMATIS SISWA DALAM PENYELESAIAN PERMASALAHAN PROGRAM LINIER Maduni Ismu Qolbi; Indrie Noor Aini
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 1 (2022): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i1.3772

Abstract

This study aims to describe the mathematical communication skills of high school students in class XI on linear program material. The research method used is descriptive research. The subjects in this study consisted of 5 students of class XI one of the public high schools in Karawang Regency which were determined using purposive sampling technique. The research data collection technique was obtained from a test instrument in the form of 3 validated description questions which contained 3 indicators of mathematical communication ability. The results of this study indicate that the mathematical communication ability of class XI high school students in Karawang Regency in understanding linear programming material is still very low. This can be seen from the average percentage of the three questions of mathematical communication skills is 48.3℅. In indicator 1, students have not been able to express mathematical ideas through writing, demonstrate and visually describe them. For indicator questions 2 students are able to understand, interpret, and evaluate mathematical ideas both in writing and in other visual forms, but there are still some errors. Meanwhile, on indicator questions 3 students have not been able to use terms, notations, mathematical symbols and their structures to present ideas, describe relationships with various situation models.
PENGARUH LAMA WAKTU PERENDAMAN MENGGUNAKAN URINE SAPI TERHADAP PERKECAMBAHAN BIJI LAMTORO TARRAMBA (Leucaena leucocephala CV. Tarramba) Susan Belipati; Thomas Lapenangga; Stormy Vertygo
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 1 (2022): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i1.3805

Abstract

The study was conducted to determine the difference in immersion time in cow urine on the percentage of germination, the average germination rate and the rate of germination growth. This study used a completely randomized design (CRD) with 4 treatments and 4 replications. The treatments were P0: Immersion in cow urine without time, P1: Immersion in cow urine for 30 minutes, P2: Immersion in cow urine for 60 minutes and P3: Immersion in cow urine for 90 minutes. The parameters in this study were the percentage of germination, the average germination rate and the growth rate of germination. Data on percentage germination, mean germination rate and growth rate of germination were analyzed using Analysis of Variance (ANOVA) and for growth rate of germination continued using Duncan's test. The results showed that the immersion time of lamtoro seeds in cow urine had a significant effect (P<0.05) on the average germination rate, but had no significant effect (P>0.05) on the percentage of germination and growth rate of germination. The best result was given by P3 treatment that gave the highest germination rate of 0.525 seed/day compared to the control which was only 0.428 seed/day. Nonetheless, it is still recommended to use cow urine to immerse seeds for 90 minutes particularly to enhance its germination rate. This research could hopefully give a useful reference for farmers as an alternative method of technology in cultivating animal feed plants for a better and improved productivity.
HUBUNGAN SUHU DAN KADAR KOTORAN CPO PADA STASIUN KLARIFIKASI Anna Angela Sitinjak; Toni Tumangger
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 1 (2022): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i1.3820

Abstract

The quality of Crude Palm Oil is known from the level of impurities and oil losses. Many factors cause the quality of CPO is not as expected, one of which is temperature. This study aims to know the relationship between temperature and levels of impurities. The research method used is descriptive corellation research and then look for the correlation coefficient to see the relationship between these two variables. The results showed that at a temperature of 900C - 950C, an impurity contents of 0.22% - 0.37% and r = -0.9584 which means that there is a strong negative relationship, namely the temperature. higher, the lower the level of impurities.
ANALISIS KEMAMPUAN PEMECAHAN MASALAH MATEMATIS SISWA KELAS IX DALAM MENYELESAIKAN SOAL PISA BERDASARKAN LANGKAH POLYA Putri Agustina; Adi Ihsan Imami
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 1 (2022): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i1.3852

Abstract

The study was intended to determine the ability to solve the mathematics problems of students in public school 2 kutawaluya using the Polya steps. The methods used in this study are qualitative, describing the ability to solve a student's problem. Data collection techniques conducted in this study include tests, interviews, and documentation. From tests done by students, 3 research samples are divided into high, moderate, and low categories. From these three samples will be interviewed, and then will be picked up documenting during research as evidence that researchers have observed. After data collection, researchers will perform a data analysis with the following step: classifying data, classifying data, disposing of unused data, the presentation of data by compiling what has already been obtained, and the last to draw conclusions in the form of a sentence, which is obtained from the data's menu. Research shows: the student with the high problem-solving capability category is poorly researched in determining formulas, the student in the category is not reexamining the established completion and is also inmeticulous in writing conclusions at one problem, and the student with low valve-problem solving capabilities, is still less able to understand the problem, plan the problem, solve the problem and reexamine it.
POTENSI MINYAK KAYU PUTIH (Melaleuca cajuputi) SEBAGAI SUMBER BAHAN AKTIF DALAM PEMBUATAN HAND SANITIZER LIDAH BUAYA Nursanti Yuliani; Sophia Grace Sipahelut; Vita Novalin Lawalata
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 1 (2022): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i1.3865

Abstract

Hand sanitizer as a medium to maintain hand hygiene is becoming a trend among the community today, especially because of the COVID-19 pandemic. Hand sanitizers with active ingredients of essential oils are considered safer than alcohol. The purpose of this research was to examine the addition of cajuput oil in the manufacture of aloe vera hand sanitizer on the physical quality, antiseptic and organoleptic activity of the hand sanitizer produced. The research design used a completely randomized design (CRD) with one factor, namely the addition of cajuput oil, with five treatment levels, namely 0 mL, 16 mL, 20 mL, 24 mL, and 28 mL with each treatment in three replications. The hand sanitizer produced was then tested for physical characteristics (density, spreadability, pH, and homogeneity), antiseptic activity, and organoleptic characteristics (color, texture, aroma and non-sticky impression). The results showed that the aloe vera hand sanitizer sample with the addition of 28 mL cajuput oil had a stronger antiseptic effectiveness among other samples and had physical characteristics that met the quality requirements of SNI hand sanitizer including pH 7.33, spreadability 6.96 cm, density 1.1546, homogeneous without any coarse grains and organoleptically acceptable and favored by the panelists.
PENGOLAHAN MINYAK JELANTAH SEBAGAI PENGGANTI BAHAN BAKAR MINYAK PADA KOMPOR MINYAK BERTEKANAN nurhikmah hikmah
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 1 (2022): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i1.3869

Abstract

Used cooking oil (Jelantah's oil) is a frying rest oil which can't be used again to fry because it contains compounds that are quite dangerous for human health, which can be destructive for humans healthy. Beside to reduce an ambient contamination, used cooking oil can be recycled as an alternative fuel, in this case as to replace kerosene. The purpose of this study was to determine the effect of the primary Air Fuel Ratio on the combustion process in pressurized stove oil and knowing whether or not the direct combustion process of used cooking oil as an alternative fuel. The filth on used cooking oil must be removed to avoid a streaming gagging on koil. Analyzing used cooking oil water rate. Fuel tank loaded with used cooking oil. Fill the compressor with an air to pressurize the fuel tank. Used cooking oil streamed inside the tank by manages flow rate then stream air with regulatory crane so up to scale which particular on flowmeter gases. Ruled air flow rate with scales regulatory crane flowmeter until up to stable state on appreciative given. Measuring temperature on burn tool with positioning different one (Spuyer, burner, burner's tip, kindled tip). The larger the primary Air Fuel Ratio, the better the mixing so that the total conversion of triglycerides into CO2 and CO products is greater. Used cooking oil may be directly used as an alternative fuel into an oil stove, especially pressured oil stove.
PERANCANGAN GAME EDUKASI “THINKING MATH” UNTUK MELATIH KEMAMPUAN PENALARAN MATEMATIS Alaya Diwimuri; Joko Soebagyo
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 1 (2022): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i1.3916

Abstract

The purpose of this study is to design and build an educational game based on android thinking math using the Kodular web-based tool with block programming language. This educational game is needed as an effort to train one's mathematical reasoning skills, and eliminate boredom and fear for those who want to learn mathematics. The results of five studies related to mathematics educational games, generally stated that mathematics educational games could increase one's interest in learning mathematics which were used effectively and interestingly. The method used is the Waterfall educational game development method. The tool used to analyze the compiler uses the Unified Modeling Language (UML). The result of the study is an Android-based math learning game. Based on the test results, it can be concluded that the implementation of the thinking math educational game to train mathematical reasoning skills was successfully carried out. For this educational game itself, it is hoped that it can be further developed in terms of animation, design, features, music, various quiz questions with more varied subject matter and more effective programming so that it becomes more interesting.
PEMANFAATAN LIMBAH TONGKOL JAGUNG MELALUI PENAMBAHAN EKSTRAK DAUN KERSEN (Muntingia Calabura) DALAM PEMBUATAN EDIBLE FILM Rais Nur Latifah; Nurmilatillah
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 7 No 1 (2022): Juli
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v7i1.3917

Abstract

Food is a product that is synonymous with packaging techniques to protect the quality of the food. The packaging technique used edible film. This study aims to make a food protective coating from corn cobs and cherry leaf extract. The research method used the preparation of edible film, functional group analysis with FTIR instrument, mechanical properties analysis, pH testing and antibacterial properties analysis. The results showed that the edible film contains flavonoid compounds with antibacterial activity. The results of the analysis of the identification of functional groups on edible films are the presence of typical absorption of hydroxide groups, C-H groups, carbonyl groups and glycosidic bonds. Analysis of the mechanical properties of edible film for the thickness level is 0.224 mm and the tensile strength is 3.855 N/cm2. Meanwhile, based on pH testing, edible films were at a neutral pH during a 10-day storage period.

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