Surya Hadi - Academia.edu (original) (raw)

Papers by Surya Hadi

Indian Journal of Natural Products and Resources

Gyrinops versteegii (Gilg.) Domke is one of the eaglewood species that is distributed especially ... more Gyrinops versteegii (Gilg.) Domke is one of the eaglewood species that is distributed especially in the East region of Indonesia, including Lombok Island, West Nusa Tenggara, and it grows in the natural habitat or is cultivated. The aim of this study was to explore different uses of G. versteegii, and reveal important ethnobotanical aspects of G. versteegii in Lombok Island. Ethnobotanical methods applied in this study included participatory observation, interview, documentation, and verification using herbarium specimens. The total reported use (RU) of G. versteegii is 19, where the stem has the highest percentage in the type of utilization. This result means that generally, G. versteegii has several potential uses in local communities that could be revealed, developed and conserved. Conservation efforts need to be considered to maintain the availability and diversity of agarwood-producing species, as well as to ensure the preservation of the natural environment where it grows.

Jurnal Penelitian Pendidikan IPA

Tea tree is an essential oil-producing plant from Australia which is also found growing in severa... more Tea tree is an essential oil-producing plant from Australia which is also found growing in several parts of Indonesia, including the island of Lombok. So far, tea tree essential oil producers on the island of Lombok do not utilize by-products in the form of hydrosol (distilled water) produced in the process of making essential oils. In this study, the characterization and analysis of the chemical composition of the hydrosol of tea tree leaves growing on the island of Lombok was carried out. The characteristic aroma of hydrosol is similar to that of tea tree essential oil. The results of the GC-MS analysis also showed that the hydrosol of tea tree leaves also had similarities with the essential oil, composed of major compounds in the form of trans-caryophyllene (28.58%), limonene (13.98%) and terpinen-4-ol (16.27%). Other compounds detected were -pinene (4.14%), -pinene (6.50%), -myrcene (8.09%), -terpineol (10.10%) and -terpinene (5.77%).

ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh pemberian berbagai konsentrasi Pb terh... more ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh pemberian berbagai konsentrasi Pb terhadap pertumbuhan serta kandungan logam timbal (Pb) di dalam organ akar, batang dan daun bibit Rhizophora stylosa sebagai dasar telaahan potensi mangrove untuk dijadikan bioindikator akumulasi Pb. Penelitian dilakukan dengan menggunakan metode eksperimen di rumah plastik dengan menumbuhkan bibit mangrove R. stylosa pada berbagai konsentrasi Pb di dalam media tanah. Percobaan dilanjutkan dengan menganalisis kandungan Pb dalam organ bibit R. stylosa dan media tanah. Desain percobaan menggunakan Rancangan Acak Lengkap (RAL) yang terdiri atas lima perlakuan konsentrasi Pb (0 ppm, 0,1 ppm, 1 ppm, 10 ppm dan 100 ppm). Hasil penelitian menunjukkan bahwa secara statistik, pemberian berbagai konsentrasi Pb (0,1-100 ppm) tidak berpengaruh terhadap pertumbuhan bibit R. stylosa selama 6 minggu pengamatan. Tetapi, pemberian perlakuan 100 ppm Cu menyebabkan konsentrasi Pb di dalam organ bibit R. stylo...

This present study has shown that residues of dithiocarbamate fungicides persisted on/in soils an... more This present study has shown that residues of dithiocarbamate fungicides persisted on/in soils and garlic bulbs on garlic growing areas of Sembcilun, Lombok island, Indonesia. The technique of analysis used was USEAP-Method S 15, based on evolution of carbon disulfide which was measured as a xanthate. The study indicated that the dithiocarbamate residues mainly persisted on soil surface (0-1 cm); ranging froml.82 to 4.82 mg/ kg dry matter and only a low concentration was found at a depth of 1-10 cm. The analysis of garlic bulbs revealed that all sampled garlic bulbs were contaminated with dithiocarbamate residues, with concentrations ranging from 8.95 to 31.26 mg/kg dry matter. Some localities showed consistently higher concentration than other localities. However, the residues tended to decrease exponentially, and within 21 days of harvesting were 0.78 and 1.73 mg/kg dry matter. This study also proved that the 'xanthate technique' was precise and reproducible for analysing...

This study is part of a research collaboration between Kyoto University and The University of Mat... more This study is part of a research collaboration between Kyoto University and The University of Mataram, aiming to identify and to utilize the agarwood plants, i.e., Gyrinops versteegii from Indonesia. The study, specifically, aims to discover anticancer agents from the bark of G. versteegii from Lombok Island of Indonesia. There were three provenances of G. versteegii observed, namely Soyun, Pantai, and Buaya. Based on the Brine Shrimp Lethality Test (BSLT), G. versteegii Buaya showed the highest cytotoxicity with LC50 45,94 μg/ml. Meanwhile, G. versteegii Soyun and Pantai have LC50 75.86 μg/mL and 56.36 μg/mL respectively. A phytochemical study showed that the methanol extract of G. versteegii Buaya containing compounds from the group of alkaloid, flavonoid, steroid, triterpenoid, and saponin. The methanol extracts fractionated using Vacuum Liquid Chromatography into 10 fractions (F1-F10) and then retested BSLT. Among the fractions, F2 showed the best potency as an anticancer with L...

Penelitian ini bertujuan untuk mengetahui komposisi kimia dari masing-masing ekstrak metanol kuli... more Penelitian ini bertujuan untuk mengetahui komposisi kimia dari masing-masing ekstrak metanol kulit kacang tanah dan ekstrak metanol minyak (VCO dan CPO) sebagai agen antidiabetes mellitus. Penelitian ini bersifat eksploratif dengan menggunakan teknik analisis GC-MS. Sampel ekstrak metanol kulit kacang tanah dan ekstrak metanol minyak (VCO dan CPO) dipartisi dengan n-heksan dan DCM. Hasil partisi kemudian dianalisis dengan GC-MS. Hasil analisis GC-MS menunjukkan, senyawa yang diduga kuat berperan sebagai agen antidiabetes mellitus pada ekstrak kulit kacang tanah yaitu asam oleat, asam linoleat, stigmast-5-en-3-ol dan 2-monoolein/2-oleoilgliserol. Pada ekstrak minyak yang diduga kuat berperan sebagai agen antidiabetes mellitus yaitu asam laurat pada ekstrak VCO dan 2- monoolein/2-oleoilgliserol pada ekstrak CPO.

Abstrak: Penelitian ini bertujuan untuk mengumpulkan informasi mengenai tumbuhan obat dari kabupa... more Abstrak: Penelitian ini bertujuan untuk mengumpulkan informasi mengenai tumbuhan obat dari kabupaten Sumbawa yang dilanjutkan dengan koleksi dan identifikasi botani, serta uji kandungan alkaloid dari bagian tumbuh-tumbuhan tersebut. Metode yang digunakan dalam penelitian ini adalah metode eksploratif dan dilanjutkan dengan uji alkaloid di laboratorium. Pengumpulan informasi tumbuhan obat dilakukan dengan teknik wawancara. Bagian-bagian tumbuhan obat yang dikumpulkan adalah daun, batang, akar, biji, umbi, bunga, dan buah yang kemudian dijadikan herbarium untuk keperluan identifikasi tumbuhan berdasarkan kelompok spesies, genus dan familia. Dari 25 jenis tumbuhan obat koleksi, tergolong dalam 24 genus dan 19 famili. Keperawakan atau bentuknya terdiri dari pohon, perdu, semak dan herba. Tumbuhan tersebut diperoleh dari areal sawah, tegalan, pekarangan, kebun dan hutan. Hasil uji alkaloid menunjukkan bahwa dari 25 tumbuhan terdapat 8 jenis (32%) tumbuhan obat yang mengandung alkaloid de...

The aims of this project were to: 1) assess the efficacy of a combined chemoand biorational appro... more The aims of this project were to: 1) assess the efficacy of a combined chemoand biorational approach involving alkaloid occurrence with antimicrobial medicinal plant use, focussing on plants from Lombok island. Lombok has a large population while herbal medicines are widely used with a diverse range of plant species. 2) Investigate the alkaloid constituents of selected plants including isolation, purification, and characterisation, and structure elucidation. 3) Evaluate antibacterial and antimalarial activities of crude alkaloid extracts and major alkaloid compounds isolated from the plants. 4) Identify compounds as possible new drug leads. A combined chemoand bio-rational strategy based on alkaloid content and traditional medicinal plant use was demonstrated to be an effective and efficient approach to finding new biologically active compounds in nature. Several new alkaloids were isolated with some potential for development as antibacterial and antimalarial agents. Some previously...

JURNAL PIJAR MIPA, Sep 1, 2009

Current concerns over the negative impacts of Hg in the environment have led to the rapid progres... more Current concerns over the negative impacts of Hg in the environment have led to the rapid progress of studies in this area. This progress has been directed to obtain analysis techniques that are able to accurately quantify Mercury (Hg) at extremely low concentration in which it frequently occurs. As part of a study on the environmental aspects of deep-sea submarine tailing placement at the Batu Hijau Mine, Sumbawa, this paper discusses recent progress in Hg analytical techniques, followed by the application of several techniques to investigate Hg concentration in seawater in the vicinity of the tailing discharge location. Using cold vapour atomic fluorescence spectrometry, dissolved Hg was found to be at sub-ng/l (ppt) levels. No dissolved Hg signal associated with the tailing discharge was found with concentrations being similar to adjacent coastal waters.

The aims of this research are to study the production process and the chemical composition of thr... more The aims of this research are to study the production process and the chemical composition of three traditional Sumbawa oils from Benete Village (BT), Batu Dulang Village (BD), and Hutan Sumbawa (HS). A survey was conducted to learn the production process; and the chemical composition of the Sumbawa oils was determined by fractionation method using three solvents with different polarity (methanol, dichloromethane (DCM) and nhexane), followed by GC-MS analysis of each extract. In general, the three Sumbawa Oils were traditionally produced by mixing various species of medical plants into the coconut oil through heating process. Based on GC-MS analysis, the constituents of the Sumbawa oils are mainly fatty acid, fatty acid ester, monoterpene, and sesquiterpene. Three major identical compounds were identified in all three products with different percentages of abundance namely octadecanoic acid/stearic acid, hexadecanoic acid/palmitic acid, and methyl palmitate. Furthermore, there were other major compounds such as linoleic acid, lycopersene, and dodecanoic acid/lauric acid. The non-natural product compounds found in Sumbawa oil extracts and the biological activities of major compounds are discussed in this article.

Abstract: Initial investigation of medicinal plants from Lombok has resulted in the collection of... more Abstract: Initial investigation of medicinal plants from Lombok has resulted in the collection of 100 plant species predicted to have antimicrobial, including antimalarial, properties according to local medicinal uses. These plants represent 49 families and 80 genera; 23 % of the plants tested positively for alkaloids. Among the plants testing positive, five have been selected for further investigation involving structure elucidation and antimicrobial testing on the extracted alkaloids. Initial work on structural elucidation of some of the alkaloids is reported briefly.

The aim of this research is to investigate the alkaloids and the potential use of Pulai (Alstonia... more The aim of this research is to investigate the alkaloids and the potential use of Pulai (Alstonia scholaris (L.) R. Br.) leaves from Lombok Island. The compounds were extracted via acid-base extraction with acetic acid 5% and the chemical composition was determined by using GC-MS with three settings of column temperature (150-270, 100-290 and 100-310°C). The result indicated the presence of alkaloids, namely Akuammidine, Voacristine, Strictamine and Nicotine, with Akuammidine as the major compound of the base fraction of Alstonia scholaris (L.) R. Br. leaves. The biosynthesis and biological activities of the alkaloids are discussed in this article to study the natural existence of the metabolites and potential uses of the leaves.

Jurnal Energi Dan Manufaktur, 2013

Jurnal PEPADU

Pengembangan peternakan sapi perlu didukung dengan ketersediaan pakan yang berkualitas yang sampa... more Pengembangan peternakan sapi perlu didukung dengan ketersediaan pakan yang berkualitas yang sampai saat ini masih merupakan kendala utama dalam peningkatan produktivitas ternak sapi. Salah satu alternatif penyediaan pakan ternak adalah memanfaatkan dan mengembangkan limbah hasil pertanian dan seperti sekam/jerami/jerami padi yang banyak tersedia di Desa Jago. Sayangnya bahan pakan jenis ini memiliki kadar protein kasar dan energi rendah dan serat kasar yang tinggi. Oleh karena itu, introduksi teknologi pakan ternak sangat diperlukan untuk meningkatkan nilai gizi pakan sekaligus menjamin ketersediaan pakan sepanjang tahun. Kegiatan pengabdian dengan memberdayakan Kelompok Tani Desa Jago dalam Pengolahan Pakan Ternak Berbasis Limbah Pertanian telah dilakukan. Mitra sasaran adalah anggota kelompok tani Tunas Harapan yang rata-rata merupakan peternak sapi. Kegiatan dilakukan dengan dua tahapan yaitu sosialisasi tentang manfaat limbah peternakan sebagai pakan ternak dan jenis pakan yang ...

Jurnal Ilmiah Abdi Mas TPB Unram

Lombok Utara merupakan salah satu kabupaten di Provinsi Nusa Tenggara Barat dengan persentase pen... more Lombok Utara merupakan salah satu kabupaten di Provinsi Nusa Tenggara Barat dengan persentase penduduk miskin tertinggi mencapai 28,83%. Kejadian gempa bumi yang berpusat di Kabupaten Lombok Utara (KLU) tahun 2018 berdampak nyata pada penurunan perekonomian masyarakat. Oleh karena itu, diperlukan upaya untuk memulihkan dan meningkatkan perekonomian masyarakat diantaranya melalui pembukaan kesempatan kerja atau berusaha. Salah satu cara yang dapat dilakukan adalah melalui pemanfaatan sumber daya alam lokal yang tersedia menjadi produk bernilai ekonomi tinggi. Salah satu jenis sumber daya alam yang banyak tersedia di Kabupaten Lombok Utara, khususnya Desa Genggelang, Kecamatan Gangga yang menjadi pilihan lokasi kegiatan pengabdian masyarakat ini adalah tumbuhan penghasil minyak atsiri seperti kayu putih dan cengkeh. Pemanfaatan tumbuhan-tumbuhan tersebut sudah sangat dikenal luas sebagai sumber utama minyak atsiri baik sebagai minyak wangi maupun pemanfatan lainnya dalam bidang keseha...

Oriental Journal of Chemistry

IOP Conference Series: Materials Science and Engineering

Acta Chimica Asiana

Superabsorbent polymer (SAP) blend has been synthesized from carboxymethyl cellulose (CMC), humic... more Superabsorbent polymer (SAP) blend has been synthesized from carboxymethyl cellulose (CMC), humic acid, and aluminum sulphate octadecahydrate cross-linker. SAP is hydrophilic networks that can absorb and retain huge amount of water within their structures. Humic acid as starting material of polymer, was isolated from subgrade Batujai Dam by using IHSS method. Water Absorption Capacity (WAC) measurement, FTIR analysis, and agitation tests to investigate the cross-linking process and which of Al3+ and SO42- ions causes the crosslinking are carried out. Optimum cross-linking ratio of CMC and cross-linker appeared to be 2wt% corresponded to WAC determination. FTIR spectrum of CMC/humic acid blend and agitation test showed that CMC react with humic acid during polymerization process via Al3+ ion. Keywords: carboxymethyl cellulose; Al3+ ion; humic acid; superabsorbent polymer.