Claim Missing Document
Check
Articles

KERAGAMAN BAKTERI ENDOFIT PADA KULTIVAR NANAS (Ananas comosus (L.) Merr) SIMADU DAN BIASA DI KABUPATEN SUBANG Rachmitasuci, Indri; Hidayat, Topik; Purwianingsih, Widi
Formica Online Vol 1, No 1 (2014): Formica Online
Publisher : Jurusan Pendidikan Biologi FPMIPA UPI

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Proses pematangan pada buah ditandai dengan adanya perubahan karakteristik buah meliputi warna, aroma, tekstur dan rasa. Perubahan karakteristik buah tersebut salah satunya dipengaruhi oleh bakteri endofit yang dapat hidup berasosiasi dalam jaringan tanaman yang mampu menghasilkan enzim dan hormon tertentu sehingga dapat mengubah sifat kimia yang akan mempengaruhi sifat fisik suatu  buah. Penelitian mengenai bakteri endofit pada buah telah banyak dilakukan, namun bakteri endofit pada buah nanas belum diidentifikasi. Buah nanas kultivar Simadu dan Biasa merupakan buah nanas yang banyak dikonsumsi masyarakat dan diolah sebagai bahan baku industri makanan yang berasal dari Kabupaten Subang. Penelitian ini bertujuan untuk mengetahui keragaman jenis bakteri endofit pada kultivar nanas Simadu dan Biasa. Metode yang digunakan dalam penelitian ini yaitu metode deskriptif dan Identifikasi bakteri dengan menggunakan karakterisasi morfologi, pewarnaan Gram dan uji biokimiawi. Isolasi bakteri dari kedua kultivar dilakukan dengan teknik pengenceran, yaitu pada seri pengenceran ke- 10-2, 10-3, dan 10-4. Bakteri-bakteri yang ditemukan pada kultivar Simadu diduga mempunyai kemiripan dengan jenis Bacillus sp, Pseudomonas sp, Enterobacter sp, Pediococcus sp, Acinetobacter sp, Lactobacillus sp, Gluconobacter sp dan Acetobacter sp. Sedangkan pada kultivar Biasa ditemukan bakteri yang diduga mempunyai kemiripan dengan jenis Bacillus sp, Pseudomonas sp, Enterobacter sp, Pediococcus sp, Acetobacter sp dan Micrococcus sp. Perbedaan keragaman bakteri pada kedua kultivar tersebut diikuti dengan perbedaan hasil uji organoleptik bahwa warna, rasa, aroma dan tekstur pada nanas Simadu lebih baik dibandingkan dengan nanas Biasa. Hal tersebut menunjukkan bahwa perbedaan bakteri endofit yang terdapat pada setiap kultivar diduga mempengaruhi karakteristik buah nanas (warna, rasa, aroma dan tekstur). Kata kunci : Nanas, Bakteri Endofit, Karakteristik buah
PENGETAHUAN KONTEN PEDAGOGI (PCK) DAN URGENSINYA DALAM PENDIDIKAN GURU Purwianingsih, Mrs Widi; Rustaman, Nuryani Y.; Redjeki, Mrs Sri
Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Vol 15, No 2 (2010): Jurnal Pengajaran MIPA
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v15i2.285

Abstract

A serius effort to reach students aspects of content, syntactically and substantively, will not be achieved without being accompanied by the knowledge of teaching strategies adopted appropriate by the teachers. Teachers should understand and be able to integrate content knowledge into knowledge about the curriculum, learning, and especially students. Such knowledge is expressed as Pedagogical Content Knowledge (PCK). To identify and assess developments of their PCK, a teacher needs a rich conceptual understanding as well as integrate with expertise in using teaching procedures, strategies and approaches, to be implemented in the classroom. PCK is considered as a strategic answer for transforming of content/subject matter into a form of presentation in the classroom. Because of PCK is one of the main components in teaching, to produce qualified teachers, equip ability PCK becomes a crucial thing to be done by the teacher-producing institutions. This is due to the PCK is important in improving teaching and learning process which aims to provide [a] better understanding of students. PCK is as important as knowledge about subject matter which is used as the subject of any learning process. Without PCK, the process of transformation of a subject matter in the effort to construct students knowledge, will not take place very well.Keywords: pedagogical content knowledge (PCK), learning, content knowledge, teaching and learning process.
Analisis Hubungan Self-efficacy dan Metakognitif terhadap Hasil Belajar Siswa SMA Berdasarkan Gender pada Konsep Genetika Suherman, Dewi Purnamasari; Purwianingsih, Widi; Diana, Sariwulan
Assimilation: Indonesian Journal of Biology Education Vol 1, No 1 (2018): March 2018
Publisher : Department of Biology Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/aijbe.v1i1.11450

Abstract

The lower of awareness, motivation, and self regulation students’ on learning is a major concern in science education. The purpose of this research is to analyze the effects of self-efficacy beliefs and metacognitive on academic performance among high school students based on gender on Genetic concept that include sub-concepts: Genetic Mendel, Heredity, and Mutation. Descriptive method is constructed this study. A total of 60 students XII grader of high school are participated in the study. Data were collected by Self-efficacy and Metacognitive Questionnaire, Genetic Concept Test, and Final Questionnaire.  Data were analyzed using inferential statistics, regression. Regression analysis indicated that self-efficacy and metacognitive was a strong predictor of academic performance. This case are showed by the value of regression, R = 0.612 so that self-efficacy and metacognitive were inferred was a strong predictor of academic performance. The other finding on this research show that male students are outperforming female students on self-efficacy, metacognitive, and academic performance, so that can be conducted a further research about how to increase level of self-efficacy and metacognitive on female students.
IDENTIFIKASI KREATIVITAS SISWA SMA DALAM PEMBELAJARAN LEVELS OF INQUIRY PADA MATERI SISTEM PERNAPASAN MELALUI ASESMEN KINERJA Situmorang, Sundy M. S.; Rustaman, Nuryani Y; Purwianingsih, Widi
Didaktika Biologi: Jurnal Penelitian Pendidikan Biologi Vol 4, No 1 (2020): DIDAKTIKA BIOLOGI
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/dikbio.v4i1.2287

Abstract

Kreativitas merupakan bagian berpikir kritis-kreatif yang penting dalam pembelajaran. Pembelajaran berbasis inkuiri menggunakan Levels of Inquiry (LOI) diterapkan untuk mendukung aspek kreativitas siswa yang dinilai melalui penilaian atau asesmen kinerja pada materi sistem pernapasan. Tujuan penelitian adalah mengidentifikasi kreativitas siswa SMA dalam pembelajaran Levels of Inquiry (LOI) dengan penerapan asesmen kinerja pada materi sistem pernapasan. Penelitian yang dilakukan adalah deskriptif dengan sampel 30 siswa secara cluster random sampling. Instrumen penelitian adalah instrumen asesmen kinerja (utama) dan tes kreativitas gambar (pendukung). Indikator kreativitas adalah fluency, elaboration dan originality yang mengacu Torrance (1977). Asesmen kinerja mencakup discovery learning, interactive demonstration, inquiry lesson, dan inquiry laboratory yang dillaksanakan dalam 2 pertemuan. Asesmen menilai kreativitas siswa (secara kelompok) dalam melakukan kegiatan LKPD dan produk sebagai tugas individu di akhir pembelajaran. Kriteria ketercapaian kreativitas dianalisis dalam persentase menggunakan tingkat penguasaan dari Purwanto (2006) dengan kategori dari NRC (2011). Hasil penelitian menunjukkan kreativitas siswa dapat teridentifikasi menggunakan asesmen kinerja dan dapat diterapkan pada pembelajaran LOI dengan persentase tertinggi indikator elaboration dan originality. Pembelajaran menggunakan LOI dapat digunakan untuk mengembangkan kreativitas siswa SMA, ditunjukkan dari persentase indikator di atas 60% (kegiatan kelompok pertemuan II dan tugas individu) dengan kategori cukup atau emerging (kreativitas telah muncul). Creativity is an important creative-critical thinking part of learning. Inquiry-based learning using the Levels of Inquiry (LOI) is applied to support student’s creativity that is assessed through performance assessment on respiratory system material. The research objective was to identify the creativity of high school students in learning Levels of Inquiry (LOI) by applying performance assessment on respiratory system material. The conducted research was descriptive with a sample of 30 students using cluster random sampling. The research instruments were the performance assessment instrument (main) and the image creativity test (supporting). The indicators of creativity were fluency, elaboration and originality which refer to Torrance (1977). The performance assessment included discovery learning, interactive demonstration, inquiry lesson, and laboratory inquiry which was carried out in 2 meetings. The assessment assessed students' creativity (as a group) in carrying out LKPD activities and product as individual assignment at the end of the lesson. Criteria for creativity achievement were analyzed in percentage using the level of Purwanto (2006) with the category of NRC (2011). The results showed that students' creativity could be identified using performance assessment and could be applied to LOI learning with the highest percentage of elaboration and originality indicators. Learning using LOI could be used to develop the creativity of high school students, as indicated by the percentage of indicators above 60% (group activities in meeting II and individual assignment) with emerging category (creativity has emerged).
Penerapan peer dan self assessment sebagai tolok ukur penilaian kinerja siswa pada materi sistem koordinasi kelas XI SMA Wulandari, Melyastuti; Sriyati, Siti; Purwianingsih, Widi
Assimilation: Indonesian Journal of Biology Education Vol 3, No 2 (2020): September 2020
Publisher : Department of Biology Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/aijbe.v3i2.28258

Abstract

The implementation of peer and self assessment has become one of the alternative in doing the product of performance assessment. The research aims to describe student’s ability using peer dan self assessment as standard performance assessment on regulation system in senior high school students. Hopefully, the peer assessment can refer to the peer and self assessment. The research applied descriptive method which involved 25 student of the XI grade senior high school. The research instruments were research were the implementation research form, online form and rubric peer assessment, online self-assessment and student response questionnaire and teacher assessment. Peer assessment was implemented by students in groups and compared to teacher’s assessment. The result showed that the implementation of peer and self assessment was great. The student’s ability in doing peer and self assessment was great too, which means that peer and self assessment can be a standard of performance assessment. The comparation of the students’ assessment and teacher assessment show the similarity with percentage 84%. The type of feedback that many students gave was C1 type (Direction correction). Student respons of implementation peer and self assessment was great and they felt helpful by implementation of peer and self assessment.
PENGETAHUAN KONTEN PEDAGOGI (PCK) DAN URGENSINYA DALAM PENDIDIKAN GURU Purwianingsih, Widi; Rustaman, Nuryani Y.; Redjeki, Sri
Jurnal Pengajaran MIPA Vol 15, No 2 (2010): JPMIPA: Volume 15, Issue 2, 2010
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v15i2.35997

Abstract

A serius effort to reach students aspects of content, syntactically and substantively, will not be achieved without being accompanied by the knowledge of teaching strategies adopted appropriate by the teachers. Teachers should understand and be able to integrate content knowledge into knowledge about the curriculum, learning, and especially students. Such knowledge is expressed as Pedagogical Content Knowledge (PCK). To identify and assess developments of their PCK, a teacher needs a rich conceptual understanding as well as integrate with expertise in using teaching procedures, strategies and approaches, to be implemented in the classroom. PCK is considered as a strategic answer for transforming of content/subject matter into a form of presentation in the classroom. Because of PCK is one of the main components in teaching, to produce qualified teachers, equip ability PCK becomes a crucial thing to be done by the teacher-producing institutions. This is due to the PCK is important in improving teaching and learning process which aims to provide [a] better understanding of students. PCK is as important as knowledge about subject matter which is used as the subject of any learning process. Without PCK, the process of transformation of a subject matter in the effort to construct students' knowledge, will not take place very well.
IMPLEMENTASI LESSON STUDY SEBAGAI UPAYA UNTUK MENINGKATKAN BELAJAR DAN PEMBELAJARAN BIOTEKNOLOGI Purwianingsih, Widi
Jurnal Pengajaran MIPA Vol 4, No 2 (2003): JPMIPA: Volume 4, Issue 2, 2003
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v4i2.35635

Abstract

Perkembangan science dan teknologi yang cepat menjadikan bioteknologi menjadi salah satu ilmu/pengetahuan yang harus dikuasai oleh warga negara Indonesia, karena disamping sangat berkaitan erat dengan kehidupan sehari-hari (daily life) juga sangat berhubungan dengan aspek ‘life skill’. Guna memberikan penekanan dan kebermaknaan tentang bioteknologi kepada siswa, guru dituntut untuk menciptakan pembelajaran yang benar dan dengan cara memberikan pemahaman yang benar pula pada siswanya. Bioteknologi merupakan salah satu topik yang dianggap sulit karena untuk memperoleh pemahaman yang benar dibutuhkan pengusaan konsep-konsep dasar yang seringkali bersifat abstrak. Lesson Study (LS) yaitu suatu model pembinaan profesi pendidik melalui pengkajian pembelajaran secara kolaboratif dan berkelanjutan berlandaskan prinsip-prinsip kolegalitas dan mutual learning untuk membangun ‘learning community’. Lesson Study dilaksanakan dalam tiga tahapan yaitu Plan (merencanakan), Do (melaksanakan), dan See (merefleksi) yang berkelanjutan. Tujuan dari penelitian ini adalah: mengobservasi dan memperoleh informasi tentang bagaimana usaha guru dan proses yang dilakukan guru dalam perencanaan, melaksanakan dan mengevaluasi secara sederhana pada konsep bioteknologi melalui metode eksperimen/praktikum di SMP. Observasi dilakukan terhadap seorang guru dan 33 siswa IX SMP I Pamulihan Kabupaten Sumedang. Pengumpulan data dalam penelitian menggunakan teknik: observasi terhadap aktivitas planing, pelaksanaan proses, dokumentasi bahan ajar (,renpel,silabus dan LKS) dan dokumentasi pelaksanaan pembelajaran,menjaring pendapat guru dan mengikuti kegiatan refleksi yang dilaksanakan setelah proses pembelajaran untuk mencatat tanggapan guru model, kepala sekolah dan para observer dalam implementasi. Hasil menunjukkan bahwa perencanaan, pelaksanaan dan evaluasi sebagai suatu kesatuan dalam strategi pembelajaran bioteknologi di SMP I Pamulihan dengan menggunakan metode praktikum/experiment cukup baik dilakukan oleh guru model. Kendala utama yang dihadapi guru dalam meliputi alokasi waktu, disamping kurangnya buku sumber dan kondisi siswa. Guru dan siswa merasa sangat suka dengan metode yang digunakan tetapi belum terlalu memberi dampak yang berarti pada peningkatan hasil belajar. Masih diperlukan upaya yang lebih keras untuk memperbaiki proses pembelajaran di kelas untuk menyiapkan calon guru dalam membelajarkan Bioteknologi
ANATOMI KALUS DARI EKSPLAN DAUN Catharanthus roseous (L). G. Don (TAPAK DARA) Purwianingsih, Widi; Yuniarti, Linda
Jurnal Pengajaran MIPA Vol 5, No 1 (2004): JPMIPA: Volume 5, Issue 1, 2004
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v5i1.35649

Abstract

Catharanthus roseous (L).G.Don merupakan tanaman yang dapat dijadikan tanaman hias dan tanaman obat. Saat ini C. roseous mulai diperbanyak melalui teknik kultur jaringan secara langsung maupun tak langsung, melalui jalur organogenesis dan embriogenesis somatik. Penelitian ini dilakukan dengan tujuan mengamati anatomi kalus C. roseous yang sedang bermorfogenesis. Daun C. roseous dengan urutan daun pertama sampai ketiga digunakan sebagai eksplan dan ditanam pada medium Murashige dan Skoog dengan penambahan zat pengatur tumbuh berupa 2,4–D dengan konsentrasi 10-5 M dan kinetin 10-6 M untuk menginduksi terbentuknya kalus. Setelah berusia 2 bulan, kalus hasil induksi disubkultur pada medium MS dengan penambahan NAA dan kinetin masing-masing 2.10-5 M dan 5.10-5 M. Selanjutnya dilakukan pengamatan morfologi dan anatomi terhadap kalus hasil subkultur yang berumur 0,24, 28, 32 dan 36 hari. Pengamatan anatomi dilakukan dengan metode paraffin. Pada pengamatan morfologi diketahui bahwa tunas terbentuk pada hari ke 28 subkultur, diawali dengan pembentukan nodul berwarna hijau. Nodul berwarna putih yang kemungkinan merupakan sel embriogenik juga ditemukan pada kalus dengan usia subkultur 36 hari. Pada pengamatan anatomi diketahui bahwa jaringan kalus tidak homogen, terdiri dari sel meristematis, sel parenkim dan ditemukan pula elemen trakheal. Pembentukan tunas diawali oleh pembelahan sel pada area meristematik yang membentuk meristemoid dan kemudian berkembang menjadi kubah meristem yang dapat membentuk primordial daun. Hasil penelitian menunjukkan pembentukan embriogenesis somatik yang ditunjukan dengan ditemukannya massa sel yang menyerupai fase globular, massa sel fase jantung, dan tahap kotiledon.
Penerapan representasi visual menggunakan komik sebagai upaya meningkatkan kemampuan berpikir kritis dan penguasaan konsep siswa pada materi sistem saraf Rahmi, Nisrina Nur; Purwianingsih, Widi; Sriyati, Siti
Assimilation: Indonesian Journal of Biology Education Vol 4, No 2 (2021): September 2021
Publisher : Department of Biology Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/aijbe.v4i2.41484

Abstract

The purposes of this research were to analyze the application of visual representations using comics as an effort to improve student’s critical thinking skills and mastery of concepts in nervous system material. The subject of this study is second grade-students in Senior High School. The method used in this research is Quasi experimental. The results of student’s critical thinking skills have increased higher in the experimental class, although the results of the critical thinking skills of the two classes are in the moderate category, the results of critical thinking in the experimental class showed that the increase in N-Gain was higher with N-Gain = 0.64 (medium category) while N-Gain in the control class = 0.53 (medium category). The results mastery of concepts in experimental class have n-gain is higher the n-gain control class with n-gain is 0.71 (high category), and the control class n-gain is 0.53 (medium category). The results of student responses showed that the majority of students were interested in using comic visual representations of 83.33%. Therefore it can be concluded that the use of comics can improve thinking skills and mastery of concepts better.
Profil keterampilan kolaborasi siswa SMA pada praktikum maya sistem ekskresi Junita, Astrid; Supriatno, Bambang; Purwianingsih, Widi
Assimilation: Indonesian Journal of Biology Education Vol 4, No 2 (2021): September 2021
Publisher : Department of Biology Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/aijbe.v4i2.41480

Abstract

This study aims to analyze high school students’ collaboration skills in an excretion system virtual lab work about detection of sugar in urine. This study also revealed students’ responses regarding virtual lab work learning. Research method used here is descriptive method. The study was conducted on 35 students in one class of 11th science grade from a public senior high school in Bandung city, that obtained by purposive sampling technique. Data were collected with non-test instruments in form of observation sheet as the main data source and worksheet, peer assessment sheet, and questionnaire as supporting data sources. Research data were analyzed in addition to getting overview of the overall collaboration skills, but also to get an overview of the collaboration skills within each indicator. The average of overall students’ collaboration skills indicator is 88.9% (very good category). Indicators of Work productively, Contribute actively, Committed to completing group goals, Able to responsible, Appreciate other’s contributions, Able to control emotions, Participate respectfully in discussions, debates, and differences, Trust each group member’s strengths are in very good category, respectively: 90%, 83.3%, 83.3%, 83.3%, 100%, 100%, 99.1% and 98.3%. Meanwhile, indicators of Balance in listening and speaking, and indicators of Able to make group decisions are in good category with percentages of 73.7% and 78.5%. The best collaboration skills indicator in this study is Appreciate other’s contributions and Able to control emotions. Highschool students’ collaboration skills profile in excretion system virtual lab work is generally in very good category, where students able to work productively; many of them contribute actively; able to balance in listening and speaking; they commited to completing group goals; able to responsible; appreciate other’s contributions; able to control emotions; participate respectfully; able to trust each group member’s strengths; and able to make decisions together. In addition, the virtual lab work learning method received a positive response from students, almost all students can feel the benefits in learning, especially to practice their collaboration skills.
Co-Authors AA. Sukarso Achmad Samsudin Adetia Yeyen Purnamasari Adi Rahmat agustina, tri wahyu Ahmad Soleh Amalianneisha Rafadewi Andhanatami Putri Aminudin, Adam Hadiana Andriyatno, Indri Annisa Rahmawati Ari Widodo Ari Widodo Asep Supriatna, Asep Asmi Nur Azizah Bambang Supriatno Dhiya Ananda Lestari Diana Rochintaniawati Donna Karolina Br Surbakti Dwi Nining Lestari Eliya, Meisy Eliyawati Eliyawati Euis Erlin Evi Roviati Ghaida Sekarlita Fadha Ghurrotul Bariroh Handi Suganda Hasibuan, Khoirunnisa Indri Andriyatno Indri Andriyatno Indri Rachmitasuci Indriyani Amalia Intan Inzelia Noor Ivo Novidsa Jannah, Novi Dewi Khadikatul Jayawarsa, A.A. Ketut Junita, Astrid K.W.A.L. Levhan Kusnadi Kusnadi Lembang, Angela Meirici Levhan, K.W.A.L. Linda Yuniarti Maesaroh, Tika Maftuha, Mahda Rizqina Maolida, Amanda Syifa Mardiana Mardiana Mimin Nurjhani Mr Amprasto Mrs Sariwulan Diana Mrs Sri Redjeki Mrs Yanti Hamdiyati Nasywa Putri Zahrani Nisa Sholehah Pangsuma Nurazizah, Widya Eko Nurhaliza Nurhaliza Nurhaliza, Nurhaliza Nuryani Rustaman Nuryani Y Rustaman Nuryani Y Rustaman Nuryani Y. Rustaman Olsiara, Lairani Purnamasari, Adetia Yeyen Puspitaningrum, Hardini Putri, Annisa Syafigha R. Riandi, R. Rahmawati, Dini Nurani Rahmi, Nisrina Nur Riandi Riandi Riandi Riandi Riandi, R Rini Solihat Rini Solihat Salahuddin Salahuddin Salahuddin Salahuddin Saleh, Farhan Muharam Santy, S Siswandari, Puti Siti Sriyati Situmorang, Sundy M. S. Sri Redjeki Sri Redjeki Sri Redjeki Suherman, Dewi Purnamasari Sukma, Ridho Ilafi Sura, Sunarto Arif Syahirah, St. Taufik Rahman Tengku Riza Zarzani N Topik Hidayat Tri Wahyu Agustina Tri Wahyu Agustina Veithzal Rivai Zainal Wahyu Surakusumah Weni Lestari Weni Lestari, Weni Widya Eko Nurazizah Widya Eko Nurazizah Wulandari, Melyastuti YAYAN SANJAYA Zaradiva, Lia