<p>ABSTRAK</p><p>Banyak tanaman yang dilaporkan memiliki kandungan senyawabahan aktif antioksidan dan antibakteri. Salah satu tanaman Indonesia yangmemiliki aktivitas ini adalah gambir (Uncaria gambir). Pada penelitian ini,ekstrak etanol daun gambir diubah menjadi derivat metilnya untukmembuatnya lebih larut dalam lemak dan diamati pengaruh derivatisasitersebut terhadap aktivitas antioksidan di laboratorium kimia organik danpengujian aktivitas antibakteri di laboratorium mikrobiologi UniversitasPadjadjaran. Penelitian ini dilaksanakan di laboratorium Kimia OrganikJurusan Kimia dan laboratorium Mikrobiologi Jurusan Biologi UniversitasPadjadjaran dari bulan Desember 2004 - Juli 2005. Ekstrak gambirdimetilasi menggunakan dimetil sulfat (DMS) dan dimurnikanmenggunakan kromatografi kolom dengan pelarut bergradien (kloroform :metanol = 99:1 ; 98:2 ; 95:5 ; 80:20 ; 70:30; dan 50:50 v/v) dan kemudianmenggunakan kloroform : metanol = 99 : 1 v/v. Aktivitas antioksidanmenunjukkan penurunan yang tampak dari peningkatan, yaitu : IC 50 13,41ppm untuk ekstrak etanol menjadi 121,81 ppm untuk hasil metilasi.Aktivitas antibakteri juga menunjukkan penurunan setelah dimetilasikarena adanya penurunan diameter hambat pertumbuhan bakteri. Duaisolat (isolat 1 dan 2) yang diperoleh dari hasil pemurnian dikarakterisasimenggunakan spektrofotometer UV-Visible dan FT-IR. Hasil yangdiperoleh mengindikasikan adanya senyawa fenolik yang ditunjukkan olehregang –OH pada 3445 dan 3448 cm -1 dan regang CH aromatik pada 3010dan 3030 cm -1 . Isolat 1 memiliki aktivitas antioksidan dan antibakteri yanglebih tinggi dibandingkan isolat 2.</p><p>Kata kunci : Uncaria gambir, derivat metil, antibakteri dan aktivitasantioksidan</p><p>ABSTRACT</p><p>The antioxidant and antibacterial activities of ethanolextract of gambir leaves (Uncaria gambir)</p><p>There are many plants in Indonesia reported to contain antioxidantand antibacterial substances. One of them having these activities is gambir(Uncaria gambir). In this research, ethanol extract of gambir leaves waschanged into its methyl derivate in order to make it more soluble in fats.The effect of the derivatization on antioxidant activity was observed atorganic chemistry laboratory and antibacterial activity was observed atmicrobiology laboratory of the Padjadjaran University. This research wascarried out in December 2004 to July 2005. Gambir extract wasmethylized using dimethylsulphate (DMS) and then purified usingcoloumn chromatography with gradient solvents (chloroform : methanol =99:1; 98:2; 50:50; 80:20; 70:30; and 50:50 v/v), and then with chloroform :methanol = 99:1 v/v. The antioxidant activity showed a decrease indicatedby an increase of IC 50 from 13.41 ppm for ethanolic extract to become121.81 ppm for the methylated compounds. The antibacterial activity alsoshowed a decrease after methylization due to the decrease of inhibitiondiameter of bacteria growth. Two isolates (isolate 1 and 2) obtained fromthe purification steps were characterized using UV-Visiblespectrophotometer and FT-IR. The results indicated the existence ofphenolic compunds showed by -OH stretching in 3,445 and 3,448 cm -1 ;and CH aromatic stretching in 3,010 and 3,030 cm -1 . Isolate 1 was higherin antioxidant and antibacterial activities than isolate 2.</p><p>Key words : Uncaria gambir, methyl derivative, antibacterial, antioxidantactivities</p>
The successful control of basal rot disease (BSR) determined by early detection of infection because when the symptoms already appear, generally plants are difficult to save. The earlier the Ganoderma infection is known, the easier the control will be and the losses can be minimized. Therefore, early detection of Ganoderma infection is very necessary, which in this study was carried out by detecting volatile compounds using electronic nose (E-nose). E-nose detection has been carried out to analyze the compounds formed in pure Ganoderma culture. Detection of plants in the field carried out at 4 levels of infection, i.e. healthy, early, moderate and severe infection. The results concluded that Ganoderma mycelium when compared with other fungi (Trichoderma, Aspergillus and Omphalina) showed significant differences when analyzed using an unsupervised PCA chemometric system. The E-nose data processed using machine learning Support Vector Machine (SVM) was able to distinguish the aroma between Ganoderma boninense CSB, G. boninense ‘Rejosari’, and G. lucidum with an accuracy rate of 99.64%. E nose was able to differentiate with high accuracy (90.95%) of each infection level even though there was still a slice between in root sample.
ABSTRAKTandan Kosong Kelapa Sawit (TKKS) merupakan salah satu limbah perkebunan yang jumlahnya sangat melimpah. Telah banyak penelitian dilakukan yang bertujuan untuk memanfaatkan limbah ini menjadi produk yang bernilai ekonomi tinggi dan salah satu adalah mengomposkan TKKS tersebut. Teknik pengomposanTKKS yang selama ini memerlukan waktu 2-4 bulan dan pengangkutan produk kompos yang dihasilkan memerlukan biaya yang mahal. Waktu pengomposan yang lama tidak dapat mengatasi permasalahan banyaknya limbah TKKS ini dihasilkan di pabrik (21-23% dari Tandan Buah Segar). Sehingga diperlukan teknik pengolahan limbah yang lebih cepat. Pada penelitian sebelumnya TKKS terbukti dapat dikonversi melalui proses pirolisis yang relatif lebih cepat menjadi arang hayati dan asap cair. Arang hayati memiliki banyak manfaat khususnya untuk meningkatkan produktivitas tanaman. Selain itu juga dapat memacu aktivitas mikroba tanah, terutama yang berasosiasi dengan akar tanaman dan mampu meningkatkan konservasi unsur hara mudah larut sehingga pencucian hara menjadi minimal. Asap cair selama ini banyak digunakan sebagai bahan pengawet makanan dan penghilang bau pada industri karet. Pada penelitian ini akan dilakukan karakterisasi arang hayati dan asap cair dari TKKS . Dari 6 kg TKKS dapat dihasilkan 1,9 kg arang hayati dan 3,6 L asap cair. Arang hayati TKKS memiliki kadar makronutrien : C 60%; N 1,07%; P 1,29%; K 13,37%; Mg 1,02%; Ca 1,71% dan mikronurien Fe 0,95%; B 31 ppm dan Zn 248 ppm, dengan pH 9. Asap cair yang dihasilkan memiliki pH 3,5 dan dapat dihilangkan kandungan tar-nya dengan pengendapan semalam. Kandungan asap cair ini. mengandung karbonil 2,984 %; turunan fenol 13,169 %; dan asam organik 74,268 %.Kata kunci : arang hayati, asap cair, TKKS, pirolisis ABSTRACT Conversion of Empty Fruit Bunches of Oil Palm (EFBOP) into Biochar and Liquid Smoke. 2017. Irma Kresnawaty, Soekarno Mismana Putra, Asmini Budiani & TW DarmonoEmpty Fruit Bunchesof Oil Palm(EFBOP) is one of very abundant waste in oil palm mill. There have been many studies in utilizing this waste into economical product, one of them is composting. EFBOP composting techniques take about 2-4 months and resulting high cost process for transportation. The long time period of composting do not solve the overwhelming amount of this waste in the oil palm mill (21-23% of Fresh Fruit Bunch). So more efficient waste treatmen ttechniques is needed. In a previous study EFBOP could be converted through pyrolysis process in relatively faster process into biochar and liquid smoke. Biochar has many benefits especially to increase crop productivity. It also could spur soil microbes activities and increase conservation soluble nutrient. Liquid smoke also has high economic value and has been widely used as a food preservative and odor remover on the rubber industry. In addition,liquid smokeis also potential for organic pesticides and herbicides. This research was conducted to convert EFBOP into biochar and liquid smoke and characterise the products. As much as1.9 kg of biochar and 3.6 l o...
The Indonesian government program of achieving self-sufficiency of soybean by 2020 requires technological innovations for the farmers. The use of plant biostimulant is an innovative strategy and proven previouslyto increase the productivity of several otherfood crops. The aim of this study was to analyze the effect of PPBBI biostimulant on the growth, productivity and quality of a Wilis variety of soybean under greenhouse conditions. PPBBI biostimulant at10 ppm and 20 ppm, was applied using foliar spray method with 20 mL volume to each plant. The applications were carried out 1 time, 2 times and 3 times. Six biostimulant treatments showed significant positive effects on the vegetative growth rate, generative organ development, and yield. The biostimulant accelerated vegetative growth to enter the generative phase earlier than that of in the control plants. The period of generative organs maturity required for treated plants was 7-14 d shorter than that of in the control plants so that the harvest period was 21 d shorter. Weight per 100 seeds of the P2-3 (application 3 times at 20 ppm); P2-2 (application 2 times at 20 ppm); P2-1 (application 1 time at 20 ppm) and P1-3 (application 3 times at 10 ppm) treatments were 20.16 g; 17.65 g; 18.89 g and 16.89 g respectively with no significant difference, while the control plants was only 11.60 g. Based on the results of all parameters e.g. average number of seeds, average weight per seed, and potential for yield improvement, the treatment of P1-3 (application 3 times at 10 ppm) was the best treatment with potential yield increase by 59.06% and oil content by 11.37%.[Key words: generative, organic biostimulant, productivity, vegetative] AbstrakProgram pemerintah Indonesia dalam pencapaian swasembada kedelai pada tahun 2020 membutuhkan dukungan inovasi teknologi yang aplikatif untuk para petani. Biostimulan tanaman merupakan salah satu teknologi yang strategis dan terbukti dapat meningkatkan produktivitas beberapa tanaman pangan. Tujuan penelitian ini adalah untuk melakukan analisis pengaruh aplikasi biostimulan PPBBI terhadap partum-buhan, produktivitas dan kualitas hasil panen kedelai varietas Wilis pada kondisi rumah kaca. Biostimulan PPBBI dengan variasi konsentrasi 10 ppm dan 20 ppm, diaplikasikan pada tanaman kedelai dengan metode penyemprotan lewat daundengan volume 20 mL per tanaman.Penyemprotan dilakukan sebanyak 1 kali; 2 kali dan 3 kali aplikasi. Enam perlakuan biostimulanyang diujikan menunjukkan pengaruh positif yang signifikan pada kecepatan pertumbuhan vegetatif, stimulasi perkembangan organ generatif dan peningkatan hasil panen. Biostimulan PPBBI mempercepat laju pertumbuhan vegetatif untuk memasuki fase generatif lebih awal dibandingkan tanaman kontrol. Masa perkembangan dan pemasakan organ generatif polong pada tanaman perlakuan menjadi lebih pendek 7-14 hari dibandingkan tanaman kontrol sehingga secara keseluruhan masa panen tanaman perlakuan lebih singkat 21 hari. Bobot per 100 biji tanaman kedelai perlakuan P2-3; P2-2; P2-1 dan P1-3 berturut-turut mencapai 20,16 g; 17,65 g; 18,89 g; dan 16,89 g dengan tidak adanya perbedaan signifikan, sedangkan tanaman kontrol hanya 11,60 g. Berdasarkan hasil analisis seluruh peubah yaitu rerata jumlah biji, rerata bobot per biji, dan potensi produksi, maka perlakuan P1-3 (aplikasi tiga kali dengan dosis 10 ppm) merupakan perlakuan terbaik dengan potensi kenaikan produksi mencapai 59,06% dan kadar lemak 13,7%. [Kata kunci: biostimulan organik, generatif, produktivitas, vegetatif]
Biochar offers option for managing land as a source of carbon and soil conditioner. The ability of biochar in increasing soil fertility associates with its ability to retain water, reduce soil acidity, and keep the availability of essential nutrients for plant thus increasing crop produc-tivity, and reducing the risk of soil erosion. Biochar is also substance to provide a suitable environment for the growth of beneficial microbes, including an isolate of Trichoderma harzianum used in this study, that has been proven capable in stimulating plant growth and suppressing soil borne diseases. The purpose of this research was to determine the in vitro compatibility of T. harzianum DT38, Indonesia Biotech-nology Research Institute for Estate Crop (IBRIEC) collection, in mixtures of EFBPO biochar and peat during 28 days. This research was performed in completely randomized design with single factor, comprising of five formulas: 1) 100% EFBOP biochar (K1), 2) 100% peat (K2), 3) Mixture of EFBOP biochar and peat = 1 : 4 (F1), 4) Mixture of EFBOP biochar and peat= 1 : 8 (F2), dan 5) Mixture of EFBOP biochar and peat= 1 : 12 (F3). The colony forming units were determined after storage to express the amount of fungal propaguls in each mixture. The results was analized using one-way ANOVA test and Duncan Test. Result showed that the total of T. harzianum DT38 propaguls was not significantly difference among five mixture preparations tested during 0 and 7 days storage. The total propaguls were insignificantly difference between F1 and K2, and also between F2 and F3in 14, 21 and 28 days incubation. Peat addition on biochar increased the total of T. harzianum DT38 propaguls during 28 days incubation. The total propaguls which are remain high in F1, F2 and F3 formula up to 28 days storage indicating that the mixtures suitable for microbe media and biofertilizer formula.Abstrak Penggunaan arang hayati (biochar) merupakan alternatif pengelolaan tanah terutama sebagai penyedia karbon dan pembenah tanah. Kemampuan biochar dalam meningkatkan kesuburan tanah berhubungan dengan kemampuannya untuk menahan air, mengurangi keasaman tanah, menjaga keter-sediaan nutrien yang penting bagi tanaman sehingga mening-katkan produktivitas tanaman, serta mengurangi resiko erosi tanah. Arang hayati juga berperan dalam menyediakan ling-kungan yang cocok untuk pertumbuhan mikroba, ter-masuk isolat Trichoderma harzianum yang digunakan dalam penelitian ini dan teruji mampu meningkatkan pertumbuhan tanaman dan mengendalikan penyakit tular tanah. Tujuan penelitian ini untuk mengetahui kompatibilitas T. harzianum DT38 koleksi BPBPI pada bahan pembawa berupa campuran biochar tandan kosong kelapa sawit (TKKS) dan gambut selama penyimpanan 28 hari secara in vitro. Penelitian ini menggunakan rancangan acak lengkap (RAL) untuk menguji lima perlakuan, yaitu : 1) 100% biochar TKKS (K1), 2) 100% gambut (K2), 3) Campuran biochar TKKS dan gambut 1 : 4 (F1), 4) Campuran biochar TKKS dan gambut 1 : 8 (F2), dan 5) Campuran biochar TKKS dan gambut 1 : 12 (F3). Hasil pengamatan pada penyimpanan 0 dan 7 hari menunjukkan bahwa jumlah propagul T. harzianum DT38 dari berbagai formula tidak berbeda nyata. Jumlah propagul antara formula F1 dan K2, serta F2 dan F3 tidak berbeda nyata pada penyim-panan 14, 21 dan 28 hari. Penambahan gambut pada biochar TKKS dapat meningkatkan jumlah propagul T. harzianum DT 38 selama penyimpanan 28 hari secara in vitro. Jumlah propagul T. harzianum DT38 pada media F1, F2 dan F3 selama penyimpanan 28 hari masih memenuhi jumlah minimal propagul dalam bahan pembawa yang menunjukkan bahwa media ini sesuai untuk pertumbuhan mikroba dan berpotensi sebagai formula pupuk hayati.
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