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Study on Lignin Isolation from Oil Palm Empty Fruit Bunches Nurcahyo Iman Prakoso; Suryo Purwono; Rochmadi Rochmadi
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 16, ISSUE 1, February 2016
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol16.iss1.art6

Telah dilakukan studi tentang isolasi lignin dari tandan kosong kelapa sawit dengan metode batch. Diharapkan melalui studi ini dapat memperoleh metode isolasi lignin yang optimal. Studi yang dilakukan meliputi optimasi suhu reaksi, rasio massa NaOH terhadap pelarut, rasio serabut terhadap pelarut, dan waktu reaksi. Dari semua perlakuan, didapatkan bahwa suhu reaksi, tekanan, konsentrasi NaOH, rasio serabut terhadap pelarut dan waktu reaksi optimum berturut-turut yaitu, 170 °C, 15 atm, 1% (b/v), 9% (b/v), dan reaksi dilakukan selama 5 jam

An Investigation of Insect Ovipositing Repellent Activity of Andrographis paniculata Ness, Acacia auriculiformis and Piper betle Linn Leaves Extracts to Batrocera carambolae Nurcahyo Iman Prakoso; Umul Azizah; Zahrah Nur Zakiyah; Mila Tria Nita; Arida Liyanita; Suputa Suputa
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 18, ISSUE 1, February 2018
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol18.iss1.art1

Batrocera carambolae was one of the main pests in some types of fruits. This pest attack resulted in quantitative damage in the form of fall of young fruit and qualitatively in the form of fruit to rot and contains maggots. This research was conducted to determine selected extract from Andrographis Paniculata Ness, Piper betle Linn and Acacia auriculiformis leaves which have repellent activity for Batrocera carambolae. Nine extracts from the maceration process of the three leaves were evaluated by placing the extracts and flies together in the cage. The ethanol, ethyl acetate, and n-hexane extracts from Andrographis Paniculata Ness, Piper betle Linn and Acacia auriculiformis leaves were applied to the test pieces and fed into a cage containing 10 male and female flies. From observation, N-hexane extracts from Andrographis Paniculata Ness and Piper betle Linn leaves and ethyl acetate extracts from Acacia auriculiformis leaf Â having good activity as repellent and potentially to be used as a insect ovipositing repellent of Batrocera carambolae.

KKN-PPM PENGOLAHAN LIMBAH KELAPA DI WATUDUWUR, BRUNO, KABUPATEN PURWOREJO Allwar Allwar; Nurcahyo Iman Prakoso; Soni Laksono
Asian Journal of Innovation and Entrepreneurship Volume 03, Issue 03, September 2018
Publisher : UII

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

Sabut kelapa pada umumnya hanya dimanfaatkan untuk keperluan bahan bakar bagi rumah tangga yang masih menggunakan kayu bakar. Di daerah penghasil kelapa, sabut kelapa sering dibuang begitu saja tanpa diolah kembali untuk mendapatkan hasil yang lebih bermanfaat. Melimpahnya limbah kelapa dari desa-desa di sekitar yang memliki perkebunan kelapa dapat diangkat sebagai potensi desa dalam meningkatkan perekonomian desa dengan memanfaatkan limbah lokal menjadi kebutuhan rumah tangga bernilai lebih.Desa Watuduwur, Bruno Purworejo adalah daerah penampung limbah kelapa, tepatnya di Dusun Ketepeng. Hanya saja kurangnya keterampilan dan peralatan yang menunjang menjadi kendala warga dalam pemanfaatan potensi yang ada. Selama ini warga hanya memanfaatkannya sebagai bahan bakar. Program pemberdayaan masyarakat ini memiliki tujuan untuk meningkatkan kesejahteraan masyarakat. Pelaksanaan ini dirancang menggunakan metode pelatihan dengan sistem penyampaian materi secara teori atau sosialisasi dan praktik atas pembelajaran yang telah dilakukan. Perencanaan tersebut seperti pelatihan pengolahan limbah, pelatihan menjahit sarung co-pillow dan matras, sosialisasi tentang pasar dan pemasaran, serta bagaimana pemanfaatan media sosial sebagai media pemasaranPengembangan Sumber Daya Manusia (SDM) dan alat produksi memberikan peluang yang baik untuk membangun industri rumah tangga. Hal ini perlu adanya dukungan dari beberapa pihak dan dapat melalui beberapa sistem. Salah satunya adalah bermitra dengan perguruan tinggi melalui program pemberdayaan masyarakat. Adanya program pendampingan dalam pemberdayaan masyarakat diharapkan bisa lebih berperan aktif dalam menjalankan serta mengembangkan perekonomian yang ada di Desa Watuduwur dengan memanfaatkan hasil pertanian lokal. Selain itu masyarakat Desa Watuduwur mampu mandiri mengembangkan usahanya hingga menjadi desa pemroduksi co-pillow dan matras yang dikenal oleh masyarakat luas dengan menjadi tujuan lokasi oleh-oleh saat berwisata ke Purworejo, tepatnya Bruno

ZnO-Porous Clay Heterostructure from Saponite as Green Catalyst for Citronellal Cyclization Dwiarso Rubiyanto; Nurcahyo Iman Prakoso; Imam Sahroni; Rico Nurillahi; Is Fatimah
Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 1 Year 2020 (April 2020)
Publisher : Department of Chemical Engineering - Diponegoro University

Green conversion in organic synthesis is one of the interesting and important topics in green chemistry. The use of heterogeneous catalysis instead of homogeneous catalysis offers some advantages, such as easy separation and reusability. In this research, a heterogeneous acid catalyst was prepared from saponite by immobilizing ZnO in the form of a pillared clay (Zn/PILS) and Zn supported on porous clay heterostructure (Zn/PCH). Physicochemical studies involving X-ray diffraction measurement, surface analysis using a gas sorption analyzer, and surface acidity measurement were performed. Results indicated that the increasing surface acidity and the high specific surface area of the material were the relevant physicochemical properties that facilitate environment-friendly citronellal cyclization. The higher values for both parameters in Zn/PCH than in Zn/PILS linearly affected citronellal conversion and the selectivity for isopulegol production. Zn/PCH demonstrated a conversion rate of 98.9% for a 3-hour reaction and a selectivity of 100% for isopulegol production, and it exhibited reusability properties. Copyright © 2020 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Molecular Modeling of An Analog Of Curcumin Compounds Pentagamavunon-0 (PGV-0) And Pentagamavunon-1 (PGV-1) Through Computational Chemistry Methods Ab-Initio HF/4-31G Nurcahyo Iman Prakoso; Lukman Hakim; Nuri Hidayati
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) VOLUME 2, ISSUE 1-2, 2017
Publisher : Universitas Islam Indonesia

Breast cancer is the second largest number of cancer cases in Indonesia, after cervical cancer. The growth of these cancer cells can be prevented with compounds Pentagamavunon-0 (PGV-0) and Pentagamavunon-1 (PGV-1). This compound is an analog of curcumin compounds that have anti breast cancer activity. Modeling the structure of compound PGV-0 and PGV-1 through computational chemistry methods Ab-initio HF/4-31G could be used to predict the geometry and structure elucidation spectra associated with pharmacological activity such as anticancer compounds theoretically.This research involves modeling the structures and spectra prediction calculation compounds PGV-0 and PGV-1 by computational chemistry methods Ab-initio HF/4-31G, using Gaussian03W. The result using Ab-initio HF/4-31G method then compared with data from experimental geometry and the results of calculations with AM1.The results showed that computational chemistry methods Ab-initio HF/4-31G calculations give better results for modeling the structure compared semiempirik method AM1.

Application of Lignin as Adsorbent for Silver (Ag) and Copper (Cu) on Electroplating Waste in Kota Gede Nurcahyo Iman Prakoso
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) VOLUME 3, ISSUE 1, 2018
Publisher : Universitas Islam Indonesia

Lignin was a component of wood and always eliminated by chemical processing in many industries. On the other hand, oil palm bunches were the waste of palm oil industry, where that also containing high lignin.This study used lignin from residual waste of palm oil industry as biomass to adsorb silver (Ag) and copper (Cu) metal that is contained in electroplating waste by looking at lignin mass ratio, temperature and time in order to obtain optimal adsorption condition. The mass variations used were 100 mg, 200 mg, 300 mg, 400 mg, and 500 mg. While for the variation of contact time were 2 hours, 3 hours, 4 hours, 5 hours, 6 hours. For temperature variations were 30 Â°C, 40 Â°C, 50 Â°C, Â Â andÂ 60 Â°C.The results showed that the most optimal lignin mass ratio in adsorbing silver and copper metals was 200 mg/ 50 mL. While the most optimal contact time were 4 hours for Ag and 2 hours for Cu. For the most optimum temperature in adsorbing Ag metal at 50 Â°C and for Cu metal at 30 Â°C.

ZnO-Porous Clay Heterostructure from Saponite as Green Catalyst for Citronellal Cyclization Dwiarso Rubiyanto; Nurcahyo Iman Prakoso; Imam Sahroni; Rico Nurillahi; Is Fatimah
Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 1 Year 2020 (April 2020)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.15.1.5800.137-145

Green conversion in organic synthesis is one of the interesting and important topics in green chemistry. The use of heterogeneous catalysis instead of homogeneous catalysis offers some advantages, such as easy separation and reusability. In this research, a heterogeneous acid catalyst was prepared from saponite by immobilizing ZnO in the form of a pillared clay (Zn/PILS) and Zn supported on porous clay heterostructure (Zn/PCH). Physicochemical studies involving X-ray diffraction measurement, surface analysis using a gas sorption analyzer, and surface acidity measurement were performed. Results indicated that the increasing surface acidity and the high specific surface area of the material were the relevant physicochemical properties that facilitate environment-friendly citronellal cyclization. The higher values for both parameters in Zn/PCH than in Zn/PILS linearly affected citronellal conversion and the selectivity for isopulegol production. Zn/PCH demonstrated a conversion rate of 98.9% for a 3-hour reaction and a selectivity of 100% for isopulegol production, and it exhibited reusability properties. Copyright © 2020 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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