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DETEKSI FORMALIN PADA IKAN ASIN MENGGUNAKAN UBI JALAR UNGU (Ipomea batatas L.) Andrew Setyawan; Evi Hanizar
Saintifika Vol 23 No 2 (2021)
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/saintifika.v23i2.28800

The content of formalin in salted fish needs to be known by the public in an easy and inexpensive way. Purple sweet potato (Ipomoea batatas) is one of the plants that contains anthocyanin which will show a color change when reacted with formalin. This study aims to determine whether purple sweet potato extract can detect formalin content in salted fish. The method used is a pure experiment with 5 treatments and 5 replications. Salted fish samples were made by the researcher himself, while purple sweet potato was extracted with a dose ratio of 1:1, 1:2 and 1:3 (v purple sweet potato extract /v aquadest). The observation parameter was the time when the color changed from purple to reddish in the salted fish sample after being dripped with purple sweet potato extract. The data were analyzed statistically using the Kurskall-Wallis test and continued with Duncan's test. The results of the analysis showed that purple sweet potato extract could detect the presence of formalin in salted fish samples (p < 0.05). The treatment with a dose of 1: 1 was able to detect the fastest formalin content at 735.40 seconds compared to treatment 1: 2 (915.20) and treatment 1: 3 (1038.40). This time is close to the time required by the positive control treatment (607.80). The conclusion of this study confirms that purple sweet potato can be used by the public to detect formalin content in food.

EFEKTIVITAS BUKU AJAR DIGITAL SISTEM EKSKRESI BERBASIS BRAIN-BASED LEARNING DILENGKAPI DENGAN AUGMENTED REALITY DAN COUPLE CARD DALAM MENINGKATKAN HASIL BELAJAR SISWA SMA Amalia Nurul Imamah; Jekti Prihatin; Pujiastuti Pujiastuti
Saintifika Vol 24 No 1 (2022)
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/saintifika.v24i1.25505

In this 21st century, education has been growing rapidly in an aspect of knowledge. This increase in knowledge is supported by the application of digital media and technology. One of the uses of technology in education is digital textbooks. This technology is very helpful for online learning during the COVID-19 pandemic. Based on the digital textbook, Brain-Based Learning approach could be empowered student's brain potential as a whole in processing and thinking. This research aims to produce effective digital textbooks to increase the interest and learning outcomes of high school students. The design of the textbook development used refers to the ADDIE model (Analysis, Design, Development, Implementation, and Evaluations). The effectiveness of the developed digital textbooks has been seen based on the interest questionnaire and student learning outcomes. The average result of the student interest questionnaire was 86.65 with a very good category. The average value of Effect size is 0.66 with a medium effect category (Medium Effect).

PENGEMBANGAN MEDIA PEMBELAJARAN BERBASIS ADOBE FLASH CS6 PADA MATERI SISTEM HORMON KELAS XI SMAN 1 PARENGGEAN Eva Tresnawati; Mukhlis Rohmadi; Ayatusa’adah Ayatusa’adah
Saintifika Vol 23 No 2 (2021)
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/saintifika.v23i2.28803

This research aims to develop learning media based on Adobe Flash CS6 on the material system of hormones that valid and practical. This research is research and development with research design model ADDIE, covering analysis, design, development, implementation, and evaluation. The instrument used a questionnaire validation is filled by media experts and material as well as a questionnaire practicality which is filled by the students. The technique of data analysis which is a technique of qualitative analysis and quantitative analysis. The results show the validation of media experts on aspects of the display of the results of 94 and aspects of programming 97, on the validation of the material to aspects of learning that is 82 and aspect of the content of 87 then the media can be said to be valid. On the questionnaire responses of students acquire 94 the media can be said to be practical.

IDENTIFIKASI KEMAMPUAN BERPIKIR KRITIS PADA PEMBELAJARAN IPA SISWA SMP NEGERI 1 GLENMORE KABUPATEN BANYUWANGI Vinandani Meryastiti; Zainur Rasyid Ridlo; Supeno Supeno
Saintifika Vol 24 No 1 (2022)
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/saintifika.v24i1.29659

Critical thinking skills is the ability to reason by using deep reasoning to obtain relevant information or knowledge and be able to draw conclusions or decisions correctly, and accently. Teachers need to know condition of students’ critical thinking skills in order to design appropriate learning designs and can help in the facilitating the increasing of students’ critical thinking skills. Therefore, it is necessary to identify the critical thinking skills of junior high school students in existing science studies. The research method used in this research is decriptive research. The study conducted by identifying students’ critical thinking skills by giving critical thinking skills tests to students of SMPN 1 Glenmore who had taken the concept of energy and energy resources in the Banyuwangi of East Java. The critical thingking skills of SMPN 1 Glenmore students who have taken the concept of energy and energy resources are in the medium category.

KARAKTERISTIK ORGANOLEPTIK SOYGHURT EDAMAME SEBAGAI MAKANAN PENDAMPING ALTERNATIF UNTUK PENDERITA STUNTING Moh. Nu'man Ash Shiddieqiey; Yoan Melly Nurrahma; Anastasya Eka Saputri; Supeno Supeno; Ulin Nuha; Diah Wahyuni; Zainur Rasyid Ridlo; Rusdianto Rusdianto
Saintifika Vol 23 No 2 (2021)
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/saintifika.v23i2.28488

Stunting sufferers in Jember Regency have increased from 17,344 in2018 to 19,870 in 2019. The purpose of this study was to determine the potential ofedamame soyghurt as an alternative complementary food for stunting sufferers. Theexperimental design used was a completely randomized design (CRD) with differentcombinations of treatments on edamame juice, skim milk, and starter. The result wasanalyse of organoleptic include taste, color, aroma, and texture with hedonic testusing 10 panelists non-skilled. Based on the result of organoleptic, the average valueof preference ranges from taste between 3.2-3.4 (slightly like to like), aroma 3.6-3.9(slightly like to like), color 3.1-4.2 (slightly like to like) like), texture 3.5-4 (slightlylike to like). The best treatment was in the combination of edamame soyghurttreatment in the proportions of skim milk 150 (%w/v), edamame juice 730 (%v/v),and sucrose 50 (%w/v) with starter 70 (%w/v).

PENGEMBANGAN MODEL BRAIN-BASED LEARNING (BBL) BERBASIS GAMIFIKASI PADA PEMBELAJARAN DARING BIOLOGI SMA DAERAH PERTANIAN INDUSTRIAL Aulia Fitria Damayanti; Jekti Prihatin; Pujiastuti Pujiastuti
Saintifika Vol 23 No 2 (2021)
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/saintifika.v23i2.28806

Implementation of online learning during the Covid-19 pandemic is not well structured, so the teacher must be able to innovate fun learning and students active learning in process to optimize potential of the environment industrial agricultural. This can applying Brain-Based Learning (BBL) model combined with gamification approach. The study to produce a valid, practical, and effective BBL-Gamification model biology online learning to increase outcomes learning and critical thinking skills in industrial agricultural areas. The development procedure used ADDIE development model which in five stages Analysis, Design, Development, Implementation, and Evaluation. The result of product validation guidebooks models, learning syllabus, lesson plans, LKPD as well pre test and post test questions is 89,96 (very valid). The practicality of learning model obtained the practice sheet learning of students and teacher responses. The average practicality of student responses is 87,73 (very good) and the teacher responses is 90 (very good).

Toksisitas Ekstrak Terpurifikasi dengan N-heksan Buah Kecubung (Datura metel L.) terhadap Mortalitas Larva Nyamuk Aedes aegypti Aditya Rico Armyandi; Dwi Wahyuni; Kamalia Fikri
Saintifika Vol 24 No 1 (2022)
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/saintifika.v24i1.26579

: Infectious diseases caused by animal vectors are currently still a health problem in the world even in Indonesia, especially the Aedes aegypti mosquito which is the vector for the spread of dengue fever. Chemical control is still a priority for the community, such as the use of abate. Continuous use of abate can cause resistance to the Aedes aegypti mosquito to the next generation and pollute water conditions. One of the control solutions can be done with natural insecticides such as amethyst fruit (Datura metel L.). The purpose of making purified extracts is to remove unnecessary impurities and get a larger content of active compounds and increase the concentration of active compounds. The concentration of amethyst extract (Datura metel L.) used was a concentration of 100 ppm, 500 ppm, 1000 ppm, 1500 ppm, 1gr abate as a positive control and aquades as a negative control. The amount of Lethal Concentration-50 (LC50) purified extract of amethyst fruit (Datura metel L.) with n-hexane was 494.987 ppm. The active compound content of amethyst fruit (Datura metel L.) in the n-hexane fraction after a phytochemical screening test was carried out was positive for alkaloids, steroids, terpenoids and tannins. The toxicity of the purified extract with n-hexane of amethyst (Datura metel L.) against Aedes aegypti mosquito larvae within 24 hours is considered toxic because it has an LC50 value of less than 1000 ppm. Kata Kunci: Aedes aegypti; Datura metel L.; n-heksan; Terpurifikasi; Toksisitas

PENGARUH LKPD BERBASIS GAMBAR PROSES TERHADAP HASIL BELAJAR DAN KEMAMPUAN BERPIKIR KRTIS SISWA KELAS VIII PADA MATERI CAHAYA Neneng Khoirunnisa; sutarto sutarto; Aris Singgih Budiarso
Saintifika Vol 23 No 2 (2021)
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/saintifika.v23i2.28730

This study aims to determine the effect of using picture-based worksheets on the material process on learning outcomes and critical thinking skills. This type of research is a quasi-experimental research with a posttest control group design. The data from the Independent Sample T-Test test obtained a sig value. (2-tailed) of 0.002 and the right-hand t-test which shows the results of the calculation tcount (3.362) > ttable (2.018) which means that there is an influence of process image-based worksheets on learning outcomes. Meanwhile, to test the ability to think critically using the Mann Whitney U-Test test which obtained the Asymp value. Sig. (2-tailed) of 0.014, which means the significance value is <0.05, which means that H0 is rejected and Ha is accepted. So there is an influence of process image-based worksheets on critical thinking skills. Based on the results of the study, it can be concluded that the process image-based worksheets significantly affect student learning outcomes and critical thinking skills

PENGEMBANGAN LKS BERBASIS PROBLEM BASED LEARNING (PBL) PADA MATERI PRISMA UNTUK MENINGKATKAN KETERAMPILAN BERPIKIR KREATIF SISWA Nur Izzatun Nisa Liliyan; Toto' Bara Setiawan; Lela Nur Safrida; Erfan Yudianto; Reza Ambarwati; Dhanar Dwi Hary Jatmiko
Saintifika Vol 23 No 2 (2021)
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/saintifika.v23i2.28807

Student worksheet based on Problem Based Learning (PBL) is a learning media that presents questions in the form of contextual problems so as to stimulate students' thinking skills. This type of research is development research using the Thiagarajan model or the Four-D Model which aims to describe the process and results of developing PBL-based student worksheets for class VIII students on Prism material that is valid, practical, and effective in training students' creative thinking skills. The method used in this research is the questionnaire method to determine the validity and practicality of the student worksheets and the test method to determine the effectiveness. The results of this study are the achievement of increasing students' creative thinking skills with very good interpretations. The student worksheets based on PBL model on prism material produced were declared valid, practical, and effective. This student worksheet could be used to improve students' creative thinking skills.

The Perbandingan Toksisitas Supernatan dan Endapan Ekstrak Terpurifikasi Daun Mindi (Melia Azedarach L.) terhadap Mortalitas Larva Nyamuk Aedes Aegypti L. Rachmita Mustika Putri; Dwi Wahyuni; Kamalia Fikri
Saintifika Vol 24 No 1 (2022)
Publisher : Jurusan Pendidikan MIPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/saintifika.v24i1.26749

One of the efforts to replace chemical insecticides to eradicate DBD is to obtain natural larvicides and it’s so environmentally friendly. Vegetable insecticides are carried out using a purified extraction process. The purpose of this study was to compare the toxicity of the supernatant and precipitated purified extract of mindi leaf (Melia Azedarach L.) on the mortality of Aedes aegypti L mosquito larvae. The samples used in this study ranged from 600-700 Aedes aegypti L mosquito larvae. This study used a design design. Completely Randomized (CRD) and the Minitab 14 for Windows application help to perform the analysis. The results showed the comparison of the toxicity of the purified extract supernatant of mindi leaf (Melia azedarach L). lower with an LC50 value > 1000 while the toxicity of the precipitated purified extract of mindi leaves (Melia azedarach L). higher with LC50 value < 1000. This research can be further tested regarding the magnitude of the toxicity in this study related to the measurement of environmental factors and also related to the KLT test to determine the possibility of new compounds, which are synergistic in the precipitate (fraksi etanol) and supernatant (fraksi n-heksan) in purified mindi leaf extract (Melia azedarach L).

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Journal Mail Official
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Kab. jember,

Jawa timur

INDONESIA