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Khaerati Khaerati, Khaerati
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Evaluasi Bakteri Endofit untuk Pengendalian Nematoda Pratylenchus coffeae pada Tanaman Kopi Harni, Rita; Khaerati, Khaerati
Jurnal Tanaman Industri dan Penyegar Vol 4, No 2 (2013): Buletin Riset Tanaman Rempah dan Aneka Tanaman Industri
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

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

Abstract

Bakteri endofit adalah bakteri yang hidup dalam jaringan tanaman dan memberikan efek yang baik pada tanaman, dapat diisolasi dari akar, batang, daun, dan buah. Penelitian isolasi, seleksi, dan potensi bakteri endofit untuk mengendalikan nematoda Pratylenchus coffeae pada tanaman kopi telah dilakukan di Laboratorium dan Rumah Kaca Balai Penelitian Tanaman Industri dan Penyegar dari bulan Januari sampai Desember 2012. Tujuan penelitian adalah mengevaluasi isolat bakteri endofit yang potensial untuk mengendalikan nematoda pada tanaman kopi. Bakteri endofit diisolasi dari akar pertanaman kopi dari daerah Jawa Barat (KP. Pakuwon, Sukabumi, Garut, dan Pengalengan) dan Lampung (KP. Natar, KP. Cahaya Negeri, dan Liwa) menggunakan metode sterilisasi permukaan. Selanjutnya bakteri endofit diseleksi antagonismenya terhadap nematoda dan kemampuan memicu pertumbuhan tanaman. Hasil isolasi bakteri endofit dari akar kopi diperoleh 442 isolat dengan kerapatan populasi bakteri endofit 5x103–5,77x106 cfu/g berat basah akar. Dari 422 isolat yang diuji, 50 isolat (12,3%) di antaranya adalah isolat yang antagonis, 60 isolat (14,21%) terbukti dapat meningkatkan pertumbuhan tanaman. Hasil pengujian in vitro dan in vivo di rumah kaca diperoleh 3 isolat yang potensial menekan nematoda P. coffeae dan meningkatkan pertumbuhan tanaman kopi, yaitu PG132, PG76, dan LW15.Kata Kunci: Kopi, isolasi, seleksi, potensi, bakteri endofit, nematoda, Pratylenchus coffeaeEndophytic bacteria are bacteria that live inside plant tissues and give a good effect on the plant, and can be isolated from the roots, stems, leaves, and fruit. Isolation, selection and potential of endophytic bacteria to control nematodes (Pratylenchus coffeae) on coffee plant had been carried out in the Laboratory and Greenhouse of Research Institute for Industrial and Beverage Crops from January to December 2012. The objectives of the study was to evaluate the potential of endophytic bacterial isolates to control nematodes in coffee plants. Endophytic bacteria were isolated from coffee root crops samples from several areas in West Java (KP. Pakuwon, Sukabumi, Garut, Pengalengan) and Lampung (KP. Natar, KP. Cahaya Negeri and Liwa). Furthermore, the isolates were selected their antagonistic activities and plant growth coffeae plant. A total of 442 isolates endophytic bacteria was obtained from coffee root with a population density of 5x103–5.77x106 cfu/g of fresh weight roots, as many as 50 (12.3%) isolates performed antagonis on nematodes, 60 isolat (14.21%) isolates stimulated the growth of coffeae plant. Result in vitro and in vivo test, there were 3 potential endophytic bacterial isolates, namely PG132, PG76, and LW15, effective to control P. coffeae and increase the coffee growth.
PERANAN AGENS HAYATI DALAM MENGENDALIKAN PENYAKIT JAMUR AKAR PUTIH PADA TANAMAN KARET The Role Of Biocontrol Agents To Control White Root Disease In Rubber Amaria, Widi; Khaerati, Khaerati; Harni, Rita
Perspektif Vol 18, No 1 (2019): Juni 2019
Publisher : Puslitbang Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/psp.v18n1.2019.52-66

Abstract

Penyakit jamur akar putih (JAP) yang disebabkan oleh Rigidoporus microporus merupakan penyakit penting pada tanaman karet (Hevea brasiliensis). Daerah serangan cukup luas dan menyebabkan kerugian ekonomi mencapai 1,8 trilliun rupiah. R. microporus merupakan patogen tular tanah yang menginfeksi mulai pembibitan sampai tanaman dewasa di lapang melalui proses mekanis dan enzimatis. Patogen R. microporus menginfeksi Rhizomorf R. microporus cepat berkembang dan mampu bertahan selama bertahun-tahun di dalam tanah. Pengendalian dengan menggunakan fungisida kimia secara terus menerus dapat mengganggu kestabilan lingkungan. Upaya mengurangi dampak negatif tersebut, dilakukan melalui penerapan teknologi pengendalian hayati dengan pemanfaatan agens hayati. Keunggulan penggunaan agens hayati antagonis adalah mudah berkembang dan beradaptasi dengan lingkungan, mengurangi inokulum patogen, mudah didapatkan dan diperbanyak, serta aman untuk lingkungan. Agens hayati antagonis yang telah digunakan untuk mengendalikan penyakit JAP, antara lain dari kelompok jamur Trichoderma, Hypocrea, Aspergillus, Chaetomium, Botryodiplodia, Penicillium, Paecilomyces, dan Eupenicillium, kelompok bakteri adalah Bacillus dan Pseudomonas, serta kelompok aktinobakteri dari marga Streptomyces. Mekanisme agens hayati menekan infeksi R. microporus dengan kompetisi, antibiosis, hiperparasitisme, dan lisis. Keefektifan dan kestabilan agens hayati perlu diformulasi dalam bentuk biofungsida dengan menggunakan bahan pembawa dan tambahan tertentu. Keberhasilan aplikasi biofungisida sangat dipengaruhi oleh faktor lingkungan seperti suhu, kelembapan, dan pH. Selain itu, juga didukung oleh komponen budi daya tanaman, seperti penggunaan pupuk organik, dan sanitasi lingkungan dengan pemusnahan sumber inokulum.  ABSTRACT White root disease (WRD) caused by Rigidoporus microporus is an important disease in rubber (Hevea brasiliensis). The area of attack was quite extensive and caused economic losses up to 1.8 trillion rupiahs. R. microporus is a soil-borne pathogen that infects from seedlings to mature plants in the field through mechanical and enzymatic processes. Rhizomorph able to spreads and survives for years in the soil. Control using chemical fungicides continuously affects the environment stability. The efforts to reduce are conducted through the application of biological control technology with the use of antagonistic biological agents. The benefits of antagonistic biological agents include: easy to develop and adapt to the environment, reducing pathogen inoculum, easily obtained and reproduced, and safe for the environment. The antagonistic biological agents to control WRD include fungus: Trichoderma, Hypocrea, Aspergillus, Chaetomium, Botryodiplodia, Penicillium, Paecilomyces, Eupenicillium, bacteria: Bacillus and Pseudomonas, and actinobacteria: Streptomyces. The mechanism of biological agents that suppress R. microporus infections with the competition, antibiosis, hyperparasitism, and lysis. The effectiveness and stability of biological agents need to be formulated into biofungicide using carriers and additives. The successful application of biofungicide is strongly influenced by environmental factors such as temperature, humidity, and pH. It is also supported by the cultivation techniques and environmental sanitation, including inoculum source. 
Komparasi Hasil Belajar Menggunakan Model Pembelajaran Problem Based Learning (PBL) dan Problem Solving (PS) Pada Materi Perubahan Lingkungan Kelas X SMA Negeri 5 Palopo Isra, Isra; Khaerati, Khaerati
Al-Nafis: Jurnal Biologi dan Pendidikan Biologi Vol 4, No 1 (2024): Al-Nafis: Jurnal Biologi dan Pendidikan Biologi
Publisher : IAIN Ternate

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46339/al-nafis.v4i1.1334

Abstract

Komparasi Hasil Belajar Menggunakan Model Pembelajaran Problem Based Learning (PBL) dan Model Pembelajaran Problem Solving (PS) pada Materi Perubahan Lingkuan kelas X SMA Negeri 5 PalopoPenelitian ini bertujuan untuk mengetahui Komparasi Hasil Belajar Menggunakan Model Pembelajaran Problem Based Learning (PBL) dan Model Pembelajaran Problem Solving (PS) pada Materi Perubahan Lingkuan kelas X SMA Negeri 5 Palopo. Jenis penelitian yang digunakan dalam penelitian ini adalah eksperimen semu dan bentuk desainnya menggunakan two group pretest-posstest design. Instrumen yang digunakan dalam penelitian adalah tes hasil belajar dan lembar observasi keterlaksanaan model pembelajaran. Pengambilan sampel dilakukan dengan teknik purposive sampling. Hasil analisis inferensial menggunakan uji Anacova diperoleh nilai signifikansi 0,963 > 0,05, maka dapat disimpulkan bahwa H0 diterima dan H1 ditolak. Hal ini berarti tidak terdapat perbedaan hasil belajar yang signifikan antara kelas eksperimen 1 dengan menggunakan model pembelajaran Problem Based Learning (PBL) dan kelas eksperimen 2 dengan menggunakan model pembelajaran Problem Solving (PS).Kata kunci: problem based learning (pbl)-1, problem solving (ps)-2, hasil belajar-3
Pengaruh Model Pembelajaran Inkuiri Terbimbing Berbantuan Media Video Terhadap Pemahaman Konsep Siswa Pada Materi Jamur (Fungi) Nurjannah, Nurjannah; Khaerati, Khaerati; Anshori, Fitrah Al
Al-Nafis: Jurnal Biologi dan Pendidikan Biologi Vol 3, No 1 (2023): Al-Nafis: Jurnal Biologi dan Pendidikan Biologi
Publisher : IAIN Ternate

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46339/al-nafis.v3i1.1012

Abstract

Based on the results of observations and interviews with biology teachers at SMA Negeri 5 Palopo, it was found that problems that often occur in the teaching and learning process are students who are less active in learning, so a model and learning media are needed. The guided inquiry learning model assisted by video media is an alternative in increasing students' conceptual understanding of mushrooms (fungi). The type in this study used a Quasi Experiment with a Non-equivalent control group design research design. The population in this study were students of Class X SMA Negeri 5 Palopo. The group that was used as a sample was class XMia1 as the experimental class and class XMia2 as the control class. The instrument in this study used a learning achievement test. Data analysis used descriptive and inferential analysis. Inferential analysis using normality test, homogeneity, and hypothesis test. The results showed that the average pretest score for the experimental class was 40.42, while the posttest average score for the experimental class was 84.00. The average value of the control class pretest was 41.52, while the posttest average value of the control class was 80.39. The hypothesis test shows that (2.37 <0.05), it can be concluded that the use of video-assisted inquiry learning models has an effect on students' understanding of concepts in the Fungi subject.Keywords: Guided Inquiry, Videos, Understanding Concepts
Pendampingan Guru dalam Penerapan Pembelajaran Berbasis Lesson Study di SMA Negeri 2 Palopo Ramli, Irwan; Nurasia, Nurasia; Khaerati, Khaerati
Jurnal Abdimas Prakasa Dakara Vol. 4 No. 1 (2024): Peningkatan Kompetensi SDM Melalui Pelatihan dan Pendampingan
Publisher : LPPM STKIP Kusuma Negara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37640/japd.v4i1.1882

Abstract

Kegiatan pendampingan guru dalam penerapan pembelajaran berbasis lesson Study di SMA Negeri 2 Palopo bertujuan untuk meningkatkan keterampilan guru dalam merancang proses pembelajaran di dalam kelas berbasis lesson study dan mampu meningkatkan keaktifan peserta didik dalam proses pembelajaran. Kegiatan ini diawali dengan dengan Fokus Group Discussion (FGD) terkait permasalahan guru disekolah serta berkoodinasi pelaksanaan workshop. Workshop berfokus pada konsep  lesson study dan perancangan pembelajaran berbasis lesson study. Tindak lanjut dari workshop ini yaitu pelaksanaan pembelajaran dengan mengadopsi lesson study yang dilaksanakan dalam tiga tahapan yaitu plan, do and see. Proses pembelajaran berbasis lesson study dilakukan sebanyak empat siklus. Adapun hasil kegiatan ini adalah meningkatnya keterampilan guru dalam penerapan pembelajaran berbasis lesson study dan meningkatkan keaktifan peserta didik dalam proses pembelajaran.
PENERAPAN METODE SAINS TEKNOLOGI MASYARAKAT PADA MATERI PENCEMARAN LINGKUNGAN DI SMAN 4 KABUPATEN LUWU asri, Asri; khaerati, Khaerati; yunus, Elma
Jurnal Biogenerasi Vol. 8 No. 2 (2023): Volume 8 Nomor 2 Artikel Publish Agustus 2023
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/biogenerasi.v8i2.2719

Abstract

Tujuan penelitian penerapan tindakan pembelajaran menggunakan model Sains Teknologi Masyarakat (STM) materi pencemaran lingkungan adalah untuk peningkatan pemahaman pengetahuan pencemran lingkungan diharapkan siswa memiliki kesadaran agar tidak ikut mencemari lingkungan yang sampai saat sekarang ini menjadi masalah nasional. Jenis penelitian yang digunakan adalah penelitian tidakan yang langsung diterapkan didalam kelas dengan cara penunjukan langsung (purposive sampling). Metode yang digunakan menggunakan tidakan empat langkah yaitu: (1) langkah perencanaan, (2) langkah tindakan, (3) langkah observasi, (4) langkah refleksi. Hasil penelitian yang diperoleh adalah: (1) hasil belajar menggunakan model Sains Teknologi Masyarakat (STM) materi pencemaran lingkungan untuk tidakan pertama diperoleh skor nilai rata-rata 43, 23 belum ada siswa yang lulus sesuai standar KKM ≥70. Dilanjutkan pada tindakan dua diperoleh skor nilaia rata-rata 83,58, jika skor angka ini dikonfirmasi pada standar nilai KKM maka ketuntasan hasil belajar 84,8%; (2) Penilaian observer pengelolaan pembelajaran empat kali pertemuan jika dikonfirmasi kriteria keterlaksanaan maka keterlaksanaan pengelolaan pembelajar kategori terlaksana dengan baik; (3) respon siswa penerapan model sains teknologi masyarakat (STM) materi pencemaran lingkungan diperoleh nilai rata-rata 2.79. Disimpulkan bahwa penerapan model pembelajaran sains teknologi masyarakat dapat meningkatkan hasil belajar yang signifikan
Ekspolarasi Konsep Fungsi Matematika Dalam Pembuatan Kain Tenun Tradisional Wajo Ja'faruddin, Ja'faruddin; Khaerati, Khaerati; Aris, Fauzan Abdillah; Jelita, Jelita; Nurdin, Nurazizah; Qalzum, Umrah Nur; Azzahra, Aulia; Ardiyanti, Fifi
Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika Vol. 8 No. 1 (2025): Sains Matematika dan Pendidikan Matematika
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/proximal.v8i1.4898

Abstract

Traditional arts and mathematics share a profound yet often overlooked connection, particularly in the process of traditional textile making. In South Sulawesi, Wajo woven fabric represents a cultural heritage whose production process involves complex mathematical calculations. This research aims to explore and analyze the application of mathematical function concepts in the Wajo weaving process. Data collection was conducted through direct observation of the weaving process, interviews with craftsmen, and documentation studies, which were then analyzed using qualitative descriptive methods. The findings reveal that the Wajo weaving process has a strong correlation with mathematical function concepts, where variables such as thread count, card patterns, and weaving techniques form mathematical relations that generate specific motifs. Understanding this relationship can contribute to the preservation and development of traditional weaving arts through scientific approaches.
Ethnomathematical Practices and Agricultural Timing in Bugis Culture Ja'faruddin, Ja'faruddin; Khaerati, Khaerati; Takdirming, Takdirming
Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika Vol. 8 No. 1 (2025): Sains Matematika dan Pendidikan Matematika
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/proximal.v8i1.5370

Abstract

This study delves into the realm of ethnomathematics within the Bugis culture, specifically examining how good and bad days for farming are determined. Utilizing a descriptive qualitative approach, the research involved direct observations at Fort Rotterdam, Makassar, alongside extensive literature reviews. The findings indicate that the division of good and bad days is based on distinct time cycles, represented by unique symbols that denote the quality of time. These traditions, passed down through generations, provide insights into the cultural values and beliefs of the Bugis community regarding the optimal timing for various activities. The symbols and guidelines not only embody cultural heritage but also illustrate the interplay between traditional time concepts and mathematical principles, such as patterns in calendar calculations. In Bugis culture, time is more than just the passage of hours—it is a living guide that intertwines spirituality with daily life. Terms like Empty, Dead, Alive, Even, and Full are imbued with profound meanings that influence their actions, ensuring harmony with natural and spiritual rhythms. The traditional time-scoring system maintains balance, but skipping intervals like midday or afternoon can significantly alter the day's designation. Analyzing daily scores and excluded intervals highlights how time segments impact activities and symbolism, with Wednesday and Saturday deemed particularly suitable for farming.
Android Based Multimedia for Teaching Science in Junior High School Ramli, Irwan; Nurasia, Nurasia; Khaerati, Khaerati
Jurnal Pendidikan Fisika Vol 13, No 1 (2025): PENDIDIKAN FISIKA
Publisher : Universitas Muhammadiyah Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26618/jpf.v13i1.17202

Abstract

The COVID-19 pandemic has profoundly transformed global education, necessitating adaptive learning strategies to overcome the challenges of remote science instruction. This study aimed to develop and evaluate Android-based interactive multimedia using Adobe Flash CS for science learning, particularly human excretory system material, at Sukamaju State Junior High School 1. The research employed a Research and Development (RD) approach based on the ADDIE model, comprising analysis, design, development, implementation, and evaluation stages. The study involved 27 students from class VIII, selected through simple random sampling. Data were collected using expert validation sheets, teacher and student response questionnaires, and student learning outcomes assessments. The results indicated that the developed multimedia met all quality standards: media expert validation (98.5%), material validation (97%), language validation (86%), and video content validation (92%), all categorized as “very valid.” In terms of practicality, teacher and student responses yielded scores of 98% and 84.2%, respectively, indicating high practicality. Regarding effectiveness, student learning outcomes averaged 87.23%, and class completeness reached 81.4%, both falling into the “very effective” category. These findings demonstrate that Android-based science multimedia significantly enhances student engagement and learning outcomes by offering visually rich, interactive, and flexible educational content. The multimedia enables autonomous learning and supports teachers in delivering effective science instruction. Future research is recommended to broaden the content coverage across subjects and to develop applications compatible with online platforms for wider accessibility.
Ekspolarasi Konsep Fungsi Matematika Dalam Pembuatan Kain Tenun Tradisional Wajo Ja'faruddin, Ja'faruddin; Khaerati, Khaerati; Aris, Fauzan Abdillah; Jelita, Jelita; Nurdin, Nurazizah; Qalzum, Umrah Nur; Azzahra, Aulia; Ardiyanti, Fifi
Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika Vol. 8 No. 1 (2025): Integrasi Matematika, Teknologi, dan Budaya dalam Pendidikan dan Aplikasi Terap
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/proximal.v8i1.4898

Abstract

Traditional arts and mathematics share a profound yet often overlooked connection, particularly in the process of traditional textile making. In South Sulawesi, Wajo woven fabric represents a cultural heritage whose production process involves complex mathematical calculations. This research aims to explore and analyze the application of mathematical function concepts in the Wajo weaving process. Data collection was conducted through direct observation of the weaving process, interviews with craftsmen, and documentation studies, which were then analyzed using qualitative descriptive methods. The findings reveal that the Wajo weaving process has a strong correlation with mathematical function concepts, where variables such as thread count, card patterns, and weaving techniques form mathematical relations that generate specific motifs. Understanding this relationship can contribute to the preservation and development of traditional weaving arts through scientific approaches.
Co-Authors Al Anshori, Fitrah Amaria, Widi Ardiyanti, Fifi Aris, Fauzan Abdillah Asri asri Azzahra, Aulia Isra, Isra Ja'faruddin, Ja'faruddin jelita, jelita Munawir, Ahmad Nurasia, Nurasia Nurdin, Nurazizah Nurjannah Nurjannah Qalzum, Umrah Nur Ramli, Irwan RITA HARNI Satriani Satriani Syamsul Bahri Takdirming, Takdirming yunus, Elma