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GROWTH PROCESS OF ORGANIC VETIVER ROOT WITH POTATO AS INTERCROPPING PLANT Kadarohman, Asep; Eko S., Ratnaningsih; Dwiyanti, Gebi; Lailatul K., Lela; Kadarusman, Ede; Nur F., Ahmad
AGRIVITA, Journal of Agricultural Science Vol 34, No 1 (2012)
Publisher : Faculty of Agriculture University of Brawijaya and Indonesian Agronomic Assossiation

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

Vetiver oil (Vetiveria zizanoides) is one of Indonesia main export commodities. Vetiver root is perennial plant and generally planted with vegetables as intercropping plant. Increasing the selling price of vetiver oil can be done by transferring the production of conventional vetiver oil (non-organic) to organic vetiver oil. Demonstration of land used was one hectare, which 2,000 m2 for planting vetiver root with potato (Solanum tuberosum) as inter-cropping plant and 8,000 m2 for vetiver root without intercropping, in Sukakarya-Samarang, Garut. The planting used goat and cow dung as manure, distillate water of vetiver oil and liquid bio-pesticide as pesticide. Variables studied included plant height, number of leaf and crotch. In the first quarter of the years, the number of leaf and crotch of vetiver root with intercropping was better than vetiver root without inter-cropping. However, there was not significant difference for plant height of vetiver root, both with and without intercropping. Products of organic potato as intercropping plant of vetiver root were less than those of non-organic potato, but the latter had a better texture and durability. Â Keywords: Vetiveria zizanoides, Solanum tube-rosum, intercropping, organic farming

GROWTH PROCESS OF ORGANIC VETIVER ROOT WITH POTATO AS INTERCROPPING PLANT Kadarohman, Asep; Eko S., Ratnaningsih; Dwiyanti, Gebi; Lailatul K., Lela; Kadarusman, Ede; Nur F., Ahmad
AGRIVITA, Journal of Agricultural Science Vol 34, No 1 (2012)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v34i1.145

Vetiver oil (Vetiveria zizanoides) is one of Indonesia main export commodities. Vetiver root is perennial plant and generally planted with vegetables as intercropping plant. Increasing the selling price of vetiver oil can be done by transferring the production of conventional vetiver oil (non-organic) to organic vetiver oil. Demonstration of land used was one hectare, which 2,000 m2 for planting vetiver root with potato (Solanum tuberosum) as inter-cropping plant and 8,000 m2 for vetiver root without intercropping, in Sukakarya-Samarang, Garut. The planting used goat and cow dung as manure, distillate water of vetiver oil and liquid bio-pesticide as pesticide. Variables studied included plant height, number of leaf and crotch. In the first quarter of the years, the number of leaf and crotch of vetiver root with intercropping was better than vetiver root without inter-cropping. However, there was not significant difference for plant height of vetiver root, both with and without intercropping. Products of organic potato as intercropping plant of vetiver root were less than those of non-organic potato, but the latter had a better texture and durability. Â Keywords: Vetiveria zizanoides, Solanum tube-rosum, intercropping, organic farming

SINTESIS 4,10,16,22-TETRAMETOKSIKALIKS[4]ARENA DARI MINYAK ADAS (Synthesis of 4,10,16,22-Tetramethoxycalix[4]Arene from Anise Oil) Sardjono, Ratnaningsih Eko
Jurnal Pengajaran MIPA Vol 2, No 1 (2001): JPMIPA: Volume 2, Issue 1, 2001
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v2i1.34900

One kind of calixarenes, i.e. 4,10,16,22-tetramethoxycalix[4]arene (4), has been synthesized from anethole (1), which was isolated from anise oil. The synthesis of 4 was carried out via acid-catalyzed procedure. The reaction route consists of three stages, i.e. (i) oxidation of 1 with KMnO4 at 40oC for 15 minutes, (ii) reduction p-anisaldehyde (2) with NaBH4 at 76oC for 3 hours, andÂ (iii) cyclotetramerization of p-anisilalcohol (3) with AlCl3 at 20oC for 2 hours. Oxidation of 1 produced 2 in 77%, whereas reduction of 2 gave 3 in 55 %. The cyclotetramerization of 3 yielded 4 in 95 %.

STUDENTSâ€™ DIFFICULTIES IN SOLVING SYNTHESIS ORGANIC COMPOUND PROBLEMS Amsad, Lusia Narsia; S, Liliasari; Kadarohman, Asep; Sardjono, Ratnaningsih Eko
Unnes Science Education Journal Vol 8 No 3 (2019): December 2019
Publisher : Department of Integrated Science, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang in Collaboration with Perkumpulan Pendidikan IPA Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/usej.v8i3.32424

Solving the synthesis problem of organic compounds requires the understanding of certain organic chemical concepts. Students need to integrate organic chemical concepts to analyze the synthesis stage of organic compounds. Therefore, purposed of this research is want to find the difficulties possessed by students in solving organic synthesis problem. The participants of this research are 14 students of chemistry education in one state university in Papua, Indonesia. The type of this research is descriptive research. The research using multiple choices with reasoning test and essay test as the instruments, that consist of 6 items of multiple choices and 3 essay items. The results analyze by percentage and described. In this research, students are given issues concerning to the concepts of organic chemistry and the synthesis of organic compounds. The result shows students' understanding on the concept of functional group of organic compound is 79%, organic compound structure is 57%, organic stability is 22%, electrophile and nucleophile is 36%, while the concept of reagent, required condition and related product stereochemistry of organic compound less than 20%. It shows students having more difficulties in the concepts of reagent, required condition and related product stereochemistry of organic compound.

Quality and Chemical Composition of Organic and Non-Organic Vetiver Oil Asep Kadarohman; Ratnaningsih Eko S.; Gebi Dwiyanti; Lela Lailatul K.; Ede Kadarusman; Ahmad Nur F.
Indonesian Journal of Chemistry Vol 14, No 1 (2014)
Publisher : Universitas Gadjah Mada

Vetiver oil (Vetiveria zizanoides) has been used as perfume materials, cosmetics, fragrance soaps, anti-inflammation, repellent, and insecticidal agents. Organic vetiver oil has higher economical value than non-organic vetiver oil and it has been regarded to be able to compete in the global market. Therefore, studies have been carried out using 1 hectare of land and the first generation of organic vetiver oil has produced 0.57% of yield, greater than non-organic (0.50%). The quality of organic and non-organic vetiver oil was analyzed by Indonesian Standard (SNI) parameter, pesticide residue test, chemical composition by GC/MS, and the appearance of vetiver root. In general, the result of organic and non-organic vetiver oil has fulfilled the national standard; the quality of organic vetiver oil was better than non-organic one. Physically, the appearance of organic vetiver root was better than non-organic vetiver root; organic vetiver root was denser, more appealing, and did not have any black spots. The pesticide residue of organic vetiver oil was lower than non-organic vetiver oil. Based on SNI test, vetiverol (oxygen compounds) in organic vetiver oil was higher than non-organic vetiver oil.

A Green Synthesis of a Novel Calix[4]Resorcinarene from 7-Hydroxycitronellal Using Microwave Irradiation Ratnaningsih Eko Sardjono; Iqbal Musthapa; Iis Rosliana; Fitri Khoerunnisa; Galuh Yuliani
Indonesian Journal of Chemistry Vol 18, No 1 (2018)
Publisher : Universitas Gadjah Mada

A new versatile macromolecule cyclic C-3,7-dimethyl-7-hydroxycalix[4]resorcinarene (CDHHK4R) has been synthesized from a fragrance agent, 7-hydroxycitronellal, via microwave irradiation. The reaction utilized a domestic microwave oven at various irradiation time and power to yield an optimum condition. As a comparison, the conventional heating method was also employed for the synthesis of the same calix[4]resorcinarene. Compared to the conventional method, microwave-assisted reaction effectively reduced the reaction time, the amount of energy consumption and the waste production. It is found that the synthesis of CDHHK4R by microwave irradiation yielded 77.55% of product, higher than by conventional heating which was only 62.17%.

Basic Law of Chemistry: Material Deepening and Project-Based Learning Design With Science Literacy Oriented for Chemistry Teachers Of High School in Sumedang and Majalengka District [Hukum Dasar Kimia: Pendalaman Materi dan Perancangan Pembelajaran Berbasis Projek Berorientasi Literasi Sains untuk Guru Kimia SMA se-Kabupaten Sumedang dan Majalengka] Florentina Maria Titin Supriyanti; Budiman Anwar; Hokcu Suhanda; Amelinda Pratiwi; Ratnaningsih Eko Sarjono; Siti Aisyah; Tuszie Widyanti; Wawan Wahyu; Asep Suryatna; Nenden Nataliawati; Cecep Jaenudin; Nia Kurniawati
Jurnal Pengabdian Isola Vol 2, No 1 (2023): JPI: VOLUME 2, ISSUE 1, 2023
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jpi.v2i1.59334

Rendahnya pencapaian siswa Indonesia pada PISA memaksa dunia Pendidikan untuk memperbaiki proses pembelajarannya. Salah satu upaya dilakukan melalui perencanaan pembelajaran yang mampu membuat siswa aktif dan berkembang literasi sainsnya. Keterbatasan guru terhadap literasi sains dan penggunaan model-model pembelajaran sangat tinggi, sehingga terkadang menjadikan pembelajaran kimia lebih bersifat teoritis, hal ini diduga menjadi salah satu penyebab rendahnya minat dan motivasi siswa untuk mempelajari kimia. Pengabdian Pada Masyarakat (P2M) tentang literasi sains dan Probleme based learning (PBL) yang dilakukan oleh Departemen Pendidikan Kimia ,UPI bekerjasama dengan guru-guru Kimia SMA/SMK Kabupaten Sumedang dan Majalengka bertujuan memberikan pendalaman materi dan perancangan pembelajaran terkait hukum dasar ilmu kimia. Metode yang diterapkan adalah workshop dilakukan secara daring maupun luring dengan skenario setara 32 jam pelajaran (JP), yaitu 8 JP luring dan 16 JP daring serta 8 JP kerja mandiri. Produk dari kegiatan ini berupa rancangan pembelajaran kimia topik hukum dasar kimia yang layak dan dan telah dievaluasi secara konteks dan konten, yang dapat digunakan pada pembelajaran kimia disekolah.

Application of Plant-Based Metal Nanomedicine in Treatment of Various Types of Cancer: A Review Hernawan, Jihan Nurafifah; Sardjono, Ratnaningsih Eko
Jurnal Kedokteran Diponegoro (Diponegoro Medical Journal) Vol 13, No 4 (2024): JURNAL KEDOKTERAN DIPONEGORO (DIPONEGORO MEDICAL JOURNAL)
Publisher : Faculty of Medicine, Universitas Diponegoro, Semarang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/dmj.v13i4.42787

Background: Plant-based nanomedicine is a rapidly growing field of research that utilizes plant-derived nanoparticles for the treatment of cancer. Nanoparticles from plant extracts have a number of advantages over synthetic nanoparticles, including biocompatibility, low toxicity, and ease of synthesis Objective: This article comprehensively explores the synthesis, characterization, and anticancer activities of silver nanoparticles (AgNPs), zinc oxide nanoparticles (ZnO-NPs), and gold nanoparticles (AuNPs) synthesized using various plant extracts Methods: The research method used in this article is Systematic Literature Review (SLR). The research method used in this article is the Systematic Literature Review (SLR). The data are collected using Harzing’s Publish or Perish. The included literature sources discuss the synthesis and characterization of plant-based nanoparticles as anticancer, are published within the last 5 years, and are indexed in Google Scholar Results: Various synthesis methods influence the properties and cytotoxic effects of silver, zinc oxide, and gold nanoparticles derived from plant extracts. Characterization techniques provide insights into their synthesis, morphology, crystalline structure, surface chemistry, and stability. Conclusion: The results of this study reveal that silver nanoparticles (AgNPs), zinc oxide nanoparticles (ZnO-NPs), and gold nanoparticles (AuNPs) synthesized from plants have great potential in the treatment of various types of cancer.

Workshop and Deepening of Carbon Chemistry Materials Using Problem-Based Learning to Improve Literacy and Critical Thinking of High School Chemistry Teacher at MGMP Pangandaran [Workshop dan Pendalaman Materi Kimia Karbon Melalui Metode Problem-Based Learning Untuk Meningkatkan Literasi dan Berpikir Kritis Guru Kimia Sekolah Menengah Atas di MGMP Kimia Wilayah Pangandaran] Mustapha, Iqbal; Pratiwi, Amelinda; Kadarohman, Asep; Supriyanti, F.M Titin; Sardjono, Ratnaningsih Eko; Sopandi, Wahyu; Aisyah, Siti; Wahyu, Wawan
Jurnal Pengabdian Isola Vol 1, No 2 (2022): JPI: VOLUME 1, ISSUE 2, 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jpi.v1i2.52438

Peningkatan kualitas sumber daya manusia merupakan komitmen bersama yang harus dilakukan oleh berbagai elemen baik pemerintah maupun masyarakat. Meningkatkan kualitas sumber daya manusia berarti membekalinya dengan berbagai keterampilan dan kompetensi. Kemampuan tersebut dapat dimiliki melalui berbagai kegiatan baik kegiatan belajar maupun berlatih yang didukung dengan berbagai elemen. Keterbatasan guru terhadap lierasi dan juga kemampuan berfikir kritis, terkadang menjadikan pembelajaran kimia lebih bersifat teoritis, dimana hal ini diduga menjadi salah satu penyebab rendahnya minat dan motivasi siswa untuk mempelajari kimia. Pengabdian Pada Masyarakat (P2M) tentang workshop pendalaman materi kimia karbon melalui Probleme based learning (PBL) dilakukan secara daring maupun luring dengan scenario setara 32 jp, yaitu 8 jp luring dan 24 jp daring. Adapun wilayah sasaran kegiatan P2M adalah MGMP kimia wilayah Pangandaran bekerjasama dengan guru-guru yang tergabung dalam MGMP Kabupaten Pangandaran, Kabupaten Ciamis, dan Kota Banjar. Adapun hasil yang diperoleh dari kegiatan P2M ini adalah analisis kurikulum dari beberapa sub-topik kimia karbon antara lain senyawa hidrokarbon, makromolekul senyawa organik, benzena, dan asam karboksilat. Selain analisis kurikulum peserta juga melakukan analisis konsepsi, analisis miskonsepsi, serta strategi pemblejaran menggunakan model PBL. Pada kegiatan ini guru-guru kimia kedepannya sangat membutuhkan workshop yang bertemakan pembelajaran berbasis PBL.Improving the quality of human resources is a joint commitment that must be carried out by various elements, both government and society. Improving the quality of human resources means equipping them with various skills and competencies. These abilities can be possessed through various activities, both learning and practicing activities that are supported by various elements. The teacher's limitations on literacy and critical thinking skills sometimes make chemistry learning more theoretical, which is thought to be one of the causes of the low interest and motivation of students to study chemistry. Community Service (P2M) regarding workshops on deepening carbon chemistry through problem based learning (PBL) conducted online and offline with a scenario equivalent to 32 jp, namely 8 jp offline and 24 jp online. The target area for P2M activities is the Pangandaran chemistry MGMP in collaboration with teachers who are members of the Pangandaran Regency, Ciamis Regency, and Banjar City MGMP. The results obtained from this P2M activity are curriculum analysis of several sub-topics of carbon chemistry, including hydrocarbon compounds, macromolecules of organic compounds, benzene, and carboxylic acids. In addition to curriculum analysis, the participants also carried out conceptual analysis, misconception analysis, and learning strategies using the PBL model. In this activity, future chemistry teachers really need workshops with the theme of PBL-based learning.

A Analisis Integrasi Computational Thinking pada Perkuliahan Biomolekul Candrawati, Emilia; Sardjono, Ratnaningsih Eko; Rohman, Ijang; Prahani, Binar Kurnia
Diklabio: Jurnal Pendidikan dan Pembelajaran Biologi Vol 9 No 1 (2025)
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/diklabio.9.1.137-145

Di era Revolusi Industri 4.0, keterampilan berpikir komputasi (Computational Thinking/CT) menjadi kompetensi esensial bagi mahasiswa dalam memahami konsep biomolekul yang kompleks. Penelitian ini bertujuan untuk menganalisis integrasi CT dalam perkuliahan biomolekul serta tantangan yang dihadapi dalam implementasinya. Penelitian menggunakan pendekatan kualitatif dengan wawancara mendalam terhadap empat dosen pengampu mata kuliah biomolekul di dua perguruan tinggi negeri. Hasil penelitian menunjukkan bahwa meskipun CT telah diakui sebagai bagian dari kebijakan pendidikan tinggi, penerapannya dalam perkuliahan biomolekul masih terbatas. Sebagian dosen telah mencoba menerapkan strategi seperti dekomposisi masalah dan analisis pola dalam reaksi biokimia, namun hambatan utama yang dihadapi adalah kurangnya pemahaman terhadap implementasi CT serta keterbatasan fasilitas pendukung seperti laboratorium dengan teknologi simulasi. Selain itu, evaluasi terhadap keterampilan CT mahasiswa dalam soal ujian masih bersifat implisit dan belum diukur secara sistematis. Oleh karena itu, diperlukan pelatihan bagi dosen serta inovasi dalam metode pembelajaran berbasis teknologi untuk meningkatkan efektivitas integrasi CT dalam perkuliahan biomolekul.

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