ABSTRAK Hasil belajar siswa kelas XI MIA di SMA N 8 Pontianak pada mata pelajaran biologi masih rendah, khususnya materi sistem imun dengan presentase ketuntasan 30,17%. Selain itu, dalam proses pembelajaran media yang digunakan hanya berupa lembar kerja siswa (LKS) menyebabkan suasana belajar menjadi monoton dan kurang mengikutsertakan siswa dalam belajar. Penerapan media pembelajaran booklet dibutuhkan untuk menyalurkan pesan sehingga dapat membantu mengatasi masalah tersebut. Penelitian ini bertujuan untuk mengembangkan media pembelajaran booklet sistem imun. Metode yang digunakan dalam penelitian yaitu model pengembangan 4-D (four D model). Berdasarkan penelitian diperoleh hasil validasi media booklet yaitu sebesar 89,3% dengan kriteria sangat valid dan kepraktisan media sebesar 89,3% dengan kategori sangat praktis. Respon siswa terhadap media booklet ada uji skala kecil dan skala besar berturut-turut yaitu sebesar 90,2% dan 86,5% (kategori respon positif). Berdasarkan pengukuran efektifitas penggunaan media diperoleh nilai gain sebesar 0,51 dengan kategori sedang. Berdasarkan hasil penelitian dapat disimpulkan bahwa hasil pengembangan media booklet dapat dikatakan valid, praktis dan efektif.Kata kunci: Pengembangan Media Pembelajaran, Media Booklet, Hasil Belajar, Sistem ImunABSTRACT Students learning outcomes in eleventh grade of SMAN 8 Pontianak in biology subject, especially immune system was still low with the passing percentage 30,17%. Beside of that, the learning process used media only a students worksheet. It cause the learning not involving the student so situation became monotonous. Booklet as the learning media needed to overcome that  problem. This study aimed to develop booklet as a media to teach immune system. Method used in this study used four D model development. Based on the study conducted, the validations result was 89,3% categorized as very valid and the practicality was 89,3% categorized as very practical. Students responds toward the booklet in large and small scale each were 90,2% and 86,5% (positive respond). Based on the efectivity measurement on booklet, the value was 0,51 categorized as intermediate. Based on the results, can be concluded that developing booklet as media was valid, practical and effective.Keywords:Developing Learning Media, Booklet Media, Learning Outcomes, Immune System.

Pembuktian oksigen sebagai hasil reaksi terang fotosintesis dapat diamati melalui metode praktikum di laboraturium. Berdasarkan hasil wawancara dengan guru mata pelajaran biologi dan siswa kelas XII IPA SMAN 1 Hulu Gurung diketahui bahwa guru menggunakan penuntun praktikum yang terdapat di dalam buku paket. Penuntun praktikum ini hanya menampilkan sedikit gambar pada cara kerja sehingga siswa mengalami kesulitan dalam memahami cara kerja dan menggunakan alat praktikum. Penelitian ini bertujuan untuk mengembangkan penuntun praktikum fotosintesis berbasis audio visual yang lanyak digunakan berdasarkan aspek kevalidan, kepraktisan, dan keefektifan. Pengembangan penuntun praktikum fotosintesis berbasis audiovisual ini menggunakan metode penelitian dan pengembangan model 4-D, yaitu tahap pendefinisian, perancangan, pengembangan dan penyebaran, tetapi tahap penyebaran tidak dilakukan. Hasil peneltian menunjukkan kevalidan pada aspek bahasa sebesar 83,33% (sangat valid), aspek materi sebesar 84,03% (sangat valid) dan aspek kegrafikan sebesar 84,72% (sangat valid). Berdasarkan uji coba skala kecil dan skala besar, kepraktisan penuntun praktikum fotosintesis berbasis audio visual bernilai posistif. Keefektifan media pembelajaran diperoleh berdasarkan nilai postest. Ketuntasan klasikal sebesar 77,77% yang menunjukkan bahwa penuntun praktikum fotosintesis berbasis audiovisual dinyatakan efektif. Kesimpulan dalam penelitian ini adalah penuntun praktikum fotosintesis berbasis audio visual yang telah dikembangkan dapat dikatakan valid, praktis dan efektif.

ABSTRAKProses pembelajaran memerlukan tambahan referensi selain buku paket dan LKS. Penelitian ini bertujuan untuk mengembangkan media pembelajaran modul animalia, yang memenuhi aspek kevalidan, kepraktisan, respon positif siswa dan keefektifan media tersebut. Metode penelitian yang digunakan yaitu pengembangan (R&D) model 4-D, meliputi tahap Define (Pendefinisian), Design (Perancangan), Develop (Pengembangan) dan Disseminate (Penyebaran), tetapi tahap Disseminate (Penyebaran) tidak dilakukan. Hasil penelitian menunjukkan kevalidan dan kepraktisan pada aspek bahasa sebesar 90% (sangat valid dan sangat praktis), aspek materi sebesar 86,33% (sangat valid dan sangat praktis) dan aspek kegrafikan sebesar 90% (sangat valid dan sangat praktis). Berdasarkan uji coba skala kecil dan uji coba skala besar, respon siswa terhadap media pembelajaran modul positif, sehingga media dapat digunakan dalam proses pembelajaran. Kefektifan media pembelajaran diperoleh berdasarkan nilai postest. Ketuntasan klasikal kelas eksperimen sebesar 83% dan ketuntasan klasikal kelas kontrol sebesar 61%, yang menunjukkan bahwa media pembelajaran modul animalia dinyatakan efektif. Berdasarkan hasil yang diperoleh, menunjukkan bahwa media pembelajaran modul layak digunakan untuk siswa dalam pembelajaran biologi materi animalia.Kata kunci: Pengembangan, media pembelajaran, modul, animalia ABSTRACT Learning process needs a learning reference such as modul. This study aimed to develop modul which concist of Animal content. Decent Modul if it meets the criteria of validity, practicality, student’s positive response and effectiveness. This study is Research and Development (R&D) method with 4D model (Define, Design, Develop without Disseminate). The result showed that the validity and the practically to language was 90% (very valid and very practical), to material was 86,33% (very valid and very practical), to graphical aspect was 90% (very valid and very practical). Based on the try out with small scale and large scale, student’s response to the media was positive, so modul can be used in the learning process. The effectiveness of the media was obtained from post test, with a percentage of 83% classical completeness in experiment class and a percentage of 61% classical completeness in control class. This result indicate that the modul fit for use as a learning reference in the material of animalia.Keyword: Development, learning reference, modul, animalia

Abstract. Rahayu HM, Putri WA, Khasanah AU, Sembiring L, Purwestri YA. 2021. Indigenous Streptomyces spp. isolated from Cyperus rotundus rhizosphere indicate high mercuric reductase activity as a potential bioremediation agent. Biodiversitas 22: 1519-1526. The purification and characterization of mercuric reductase of four indigenous Streptomyces spp. from Cyperus rotundus L. rhizosphere in mercury-contaminated area have been investigated. Cell-free extract was obtained by disrupting cells using sea sand at 4 °C followed by centrifugation. Mercuric reductase was purified by ammonium sulfate precipitation, dialysis, and chromatography column (DEAE Sepharose anion column chromatography). The determination of optimum pH and temperature of mercuric reductase activity was measured based on the number of NADPH2 oxidized to NADP per mg protein per minute using a spectrophotometer. The molecular weight of mercuric reductase was determined using SDS-PAGE. Result showed that the highest specific activity of mercuric reductase was recorded from Streptomyces spp. BR28. The optimum pH and temperature of cell-free extract enzyme mercuric reductase were 7.5 and 80 °C, respectively. The enzyme was purified to 431.87-fold with specific activity 21918.95 U/mg protein. SDS PAGE showed that the molecular weight of mercuric reductase in Streptomyces spp. BR 28  ranged from 50 kDa to 75 kDa. It can be concluded that Streptomyces isolates contain mercuric reductase and have potential as mercury bioremediation agent to overcome mercury contamination in the environment.

The purpose of this research is to develop valid, practical

Scientific literacy research by the Program for International Student Assessment (PISA) in the period 2000-2015 shows that the scientific literacy ability of Indonesian students is at a low level. This study aims to determine the scientific literacy ability of state high school students in Singkawang City. The method used is descriptive qualitative. The research was conducted in two public high schools in Singkawang City, namely SMA 1 and SMA 2 Singkawang. The samples taken were 127 students selected based on the simple random sampling technique. The research instrument used was a scientific literacy test in multiple-choice questions consisting of the dimensions of context, knowledge and competence. The results showed that the average science literacy test scores of SMA 1 students in the context dimension were 38%, the knowledge dimension was 40%, and the competence dimension was 39% which were very low. SMA 2 has 40% context dimension, 41% knowledge dimension and 39% competency dimension, classified as very low. So it can be concluded that SMA 1 and SMA 2 Singkawang students have very low scientific literacy skills based on three dimensions of scientific literacy ability

The study aims to determine the relationship between digital literacy and the learning results on the biology of class vii for the 12th country school class vii. This type of research is a quantitative study with a correlational method. The population in this study is class vii in the 12 countries' middle schools. The samples used in this study number 88 students. Research instruments using tankettes. The data analysis technique used is by using a product-moment correlation. Studies show the class vii c, d, e, and f's digital literacy of class vii c, d, e, and f get an average of 60.77 present in the moderate category. In contrast, the results of the student biology study of students get an average of 68.02 gifts in the intermediate class. Product correlation analysis between x variables and y variables show that r recount (0.290) > t-table (1.987) so that there is a link between digital literacy and the study of the biological student vii class 12 countries

Sikap ilmiah merupakan perilaku individu dalam memecahkan suatu masalah dengan langkah-langkah ilmiah. Sikap ilmiah menghasilkan pengetahuan dan keterampilan. Prestasi belajar merupakan penguasaan pengetahuan atau keterampilan yang dikembangkan melalui mata pelajaran, ditunjukkan dengan nilai tes atau angka nilai yang diberikan oleh guru. Penelitian ini bertujuan untuk mengetahui sikap ilmiah siswa, prestasi belajar siswa dan korelasi sikap ilmiah dan prestasi belajar siswa. Penelitian ini menggunakan metode deskriptif korelasi dengan pendekatan kualitatif. Teknik pengumpulan data menggunakan observasi, wawancara dan studi dokumenter nilai ulangan harian siswa kelas VIII B SMP Negeri 3 Sungai Kakap. Sikap ilmiah yang diteliti yaitu sikap rasa ingin tahu, disiplin, tanggung jawab, teliti, kerjasama, jujur dan kepedulian. Hasil penelitian menunjukkan rata-rata sikap ilmiah 69,98% pada kategori cukup. Sikap ilmiah pada kategori terendah terdapat pada indikator rasa ingin tahu dengan rata-rata 55,95%, sikap ilmiah tertinggi terdapat pada indikator tanggung jawab dengan rata-rata 89,28%, dan sikap ilmiah pada kategori cukup terdapat pada indikator sikap teliti, kerjasama, jujur dan kepedulian. Sedangkan prestasi belajar rata-rata 70 dengan persentase ketuntasan 57,14%. Hasil korelasi berhubungan sangat kuat dengan r = 0,92. Disimpulkan terdapat hubungan antara sikap ilmiah dan prestasi belajar siswa.