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All Journal Best Journal (Biology Education, Sains and Technology) Indonesian Journal of Biology Education
Reti Purwasi
Universitas Sultan Ageng Tirtayasa
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Public Health

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Potensi Tanaman Melinjo Sebagai Antibakteri Alami Terhadap Bakteri Patogen Rida Oktorida Khastini; Reti Purwasi; Ridha Puteri Athaya; Yayu Widiya
BEST Journal (Biology Education, Sains and Technology) Vol 6, No 2 (2023): September 2023
Publisher : Program Studi Pendidikan Biologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/best.v6i2.7215

Abstract

 Melinjo (Gnetum gnemon L.)  merupakan salah satu komoditas lokal di Indonesia yang memiliki ragam manfaat pada semua bagian organ tanaman. Kandungan senyawa metabolit sekunder seperti flavonoid, tanin, alkaloid, steroid, saponin yang berpotensi sebagai zat antibakteri dapat diisolasi daru bagian daun, kulit biji, dan bijinya melinjo. Penelitian ini bertujuan untuk menkaji dan menganalisis, yang telah ada dalam literatur untuk mendapatkan pemahaman mengenai potensi tanaman melinjo sebagai antibakteri alami. Metode yang digunakan adalah studi literatur dari berbagai jurnal ilmiah nasional dan internasional hasil penelusuran internet.  Berdasarkan hasil penelusuran pustaka dapat diketahui bahwa zat antibakteri dari ekstrak daun, biji dan kulit melinjo mampu menghambat aktivitas pertumbuhan bakteri patogen gram negatif yaitu Salmonella typhi, Salmonella enteritidis, Escherichia coli dan Pseudomonas aeruginosa  serta kelompok bakteri gram positif yang terdiri dari Streptococcus mutans, Staphylococcus aureus, Propionibacterium acnes dan Listeria monocytogenes. Aktivitas antibakteri ditunjukkan dengan terbentuknya diameter zona hambat di media pertumbuhan. Perbedaan nilai aktivitas dipengaruhi dari senyawanya, konsentrasi dari ekstraknya, daya difusi dari ekstrak, jenis patogen yang dihambat dan pelarut ekstrak.   
Scientific Communication and Student Interest in Biology Learning through Pictorial Riddle Method Lailatun Nisfiyah; Ratih Oktatira; Riza Indriyani; Reti Purwasi; Tasya Alya Permata; Indah Juwita Sari
Indonesian Journal of Biology Education Vol. 7 No. 1 (2024): INDONESIAN JOURNAL OF BIOLOGY EDUCATION
Publisher : Universitas Tidar

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Abstract

Currently, the main challenge in education is to increase student engagement in science learning. Scientific communication skills are critical skills students need. The use of Pictorial Riddle method is a technique, way or effort made in learning to inform scientific facts for students through images, for example presented in the form of posters, pictures on the blackboard, or projections contained in object transparencies. This study aims to explore how the use of Pictorial Riddle learning method can improve students' scientific communication skills and at the same time arouse their interest in science learning. The method used in this research is a case study, using a sample of 57 students of class XI MIPA selected by random sampling technique. The results showed that the Pictorial Riddle learning method has a good effect on students' interest in science learning where students get learning equipped with pictures on the learner worksheet to be analyzed by students. The Pictorial Riddle approach opens space for student creativity, increases active participation, and strengthens understanding of scientific concepts. This can be the basis for innovative learning approaches, namely with a group learning system to develop scientific communication skills and increase student interest in science learning
Co-Authors Indah Juwita Sari Lailatun Nisfiyah Ratih Oktatira Rida Oktorida Khastini Ridha Puteri Athaya Riza Indriyani Tasya Alya Permata Yayu Widiya