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All Journal CHEMISTRY PROGRESS Jurnal Natur Indonesia Jurnal Sains dan Teknologi Jurnal Riset Kimia Alchemy Jurnal Penelitian Kimia Jurnal Sains Teknologi dan Lingkungan (JSTL) Jurnal Penelitian Pendidikan IPA (JPPIPA) ALCHEMY Jurnal Penelitian Kimia JURNAL MUQODDIMAH : Jurnal Ilmu Sosial, Politik dan Hummaniora Indonesian Journal of Chemistry Molekul: Jurnal Ilmiah Kimia Jurnal Pengabdian Masyarakat Sains Indonesia (Indonesian Journal Of Science Community Services) Jurnal Kesehatan dan Sains STIKES Griya Husada Sumbawa Rengganis Jurnal Pengabdian Masyarakat Jurnal Pijar MIPA IBDA': Jurnal Kajian Islam dan Budaya Makara Journal of Science Jurnal Pepadu Jurnal Pengabdian Inovasi Masyarakat Indonesia Jurnal Pengabdian Sosial Al Hayat: Jurnal Pengabdian Masyarakat Jurnal Ilmiah Multidisiplin Jurnal Sostekmas: Jurnal Ilmu Sosial, Teknologi, dan Pengabdian Masyarakat

Dedy Suhendra

Program Studi Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Mataram, Jalan Majapahit No. 62, Mataram

Author-ID : 389575

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Dentistry Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Nursing Physics Public Health Social Sciences Other

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SCREENING DAN ANALISIS KADAR OMEGA-3 DARI RUMPUT LAUT PULAU LOMBOK NTB Erin Ryantin Gunawan; Dedy Suhendra
Molekul Vol 7, No 2 (2012)
Publisher : Universitas Jenderal Soedirman

Penelitian ini mempunyai tujuan untuk mengidentifikasi jenis rumput laut yang mengandung omega-3 dan mengetahui kadar omega-3 dari rumput laut yang terdapat di pantai Pulau Lombok NTB. Minyak yang terdapat dalam rumput laut diekstraksi dengan metoda soxhletasi. Identifikasi dan kadar asam lemak dalam rumput laut ditentukan dengan alat GC-MS. Sembilan jenis rumput laut telah dianalisa dengan kadar air berkisar antara 42% -86,5%. Minyak hasil ekstraksi mempunyai kadar antara 0,63%-4,39%. Dari ke sembilan jenis dipilih 4 jenis rumput laut yang mempunyai kadar minyak yang paling tinggi. Dua jenis rumput laut yang biasa dikonsumsi (Eucheuma Spinosum dan Eucheuma Cottoni) dan dua jenis lagi yang tidak biasa dikonsumsi (Gracilaria salicorniadan Ulva sp). Asam-asam lemak omega-3 yang dapat teridentifikasi dari keempat jenis rumput laut adalah asam linolenat, Eikosatrienoat (ETE), eikosapentaenoat (EPA) dan (dokosaheksaenoat) DHA dalam jumlah yang bervariasi. Kadar asam lemak dalam keempat jenis rumput laut berkisar antara 26,8%-52,26% dan kandungan omega-3 antara 1,86%-5,46%.

UJI AKTIVITAS ANTIOKSIDAN DAN PENAPISAN FITOKIMIA DARI EKSTRAK DAUN PAKOASI DAN KLUWIH SEBAGAI SUMBER ANTIOKSIDAN ALAMI Nurlaila Agustikawati; Yayuk Andayani; Dedy Suhendra
Jurnal Penelitian Pendidikan IPA Vol. 3 No. 2 (2017): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v3i2.93

This study aims to determine the antioxidant activity and secondary metabolism of pakoasi leaf extract and kluwih leaf. Analysis using DDPH method (1,1-diphenyl-2-picrylhydrazyl). Result of antioxidant activity test in. Concentration Barriers (IC50). IC50 values for leaf extract of pakoasi and kluwih leaves were 89.659 μg / mL and 54.719 μg / mL greater than IC50 vitamin C of 46.74 μg / mL. Qualitative analysis of antioxidant compounds using TLC technique showed seven chromatogram profiles for pakoasi leaf extract and four chromatogram profiles for kluwih leaf extract. In addition, phytochemical analysis of leaf extract of pakoasi and kluwih leaves showed the presence of saponin compounds, tannins, phenols, flavonoids, steroids and triterpenoids. Based on the results of this analysis concluded that leaf extract of pakoasi and kluwih leaf as natural source of antioxidant which can be seen with IC50 value in the sample is in strong category and supported from phytolyte analysis result which according to phenol and flavonoid which act as antioxidant.Keywords: Antioxidant activity, phytochemical analysis ethanol extract, green bean leaves, kluwih leaves, leaves of pakoasi

UJI AKTIVITAS ANTIOKSIDAN DAN PENAPISAN FITOKIMIA DARI EKSTRAK DAUN PAKOASI DAN KLUWIH SEBAGAI SUMBER ANTIOKSIDAN ALAMI Nurlaila Agustikawati; Yayuk Andayani; Dedy Suhendra
Jurnal Kesehatan dan Sains Vol 1 No 1 (2017): JURNAL KESEHATAN DAN SAINS (JKS)
Publisher : LPPM STIKES Griya Husada Sumbawa

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Antioksidan merupakan senyawa yang dapat menetralisir radikal bebas. Penggunaan antioksidan sintesis tidak direkomendasikan oleh BPOM karena beberapa diantaranya bersifat karsinogenik, sehingga perlu dikembangkan antioksidan alami dari tanaman. Penelitian ini bertujuan untuk mengetahui aktivitas antioksidan dan mengidentifikasi senyawa metabolit sekunder dari ekstrak daun pakoasi dan daun kluwih. Analisis dilakukan menggunakan metode DDPH (1,1-diphenyl-2-pikrylhydrazyl). Hasil uji aktivitas antioksidan dinyatakan dalam nilai Inhibition Concentration (IC50). Nilai IC50 untuk ekstrak daun pakoasi dan daun kluwih berturut-turut 89,659 μg/mL dan 54,719 μg/mL lebih besar dibandingkan dengan nilai IC50 vitamin C yaitu 46,74 μg/mL. Analisis kualitatif senyawa antioksidan menggunakan teknik KLT menunjukkan adanya tujuh profil kromatogram untuk ekstrak daun pakoasi dan empat profil kromatogram untuk ekstrak daun kluwih. Selain itu analisis fitokimia ekstrak daun pakoasi dan daun kluwih menunjukkan adanya kandungan senyawa saponin, tanin, fenol, flavonoid, steroid dan triterpenoid. Berdasarkan hasil analisis ini disimpulkan bahwa ekstrak daun pakoasi dan daun kluwih berpotensi sebagai sumber antioksidan alami yang dapat dilihat dengan nilai IC50 pada sampel berada dalam kategori kuat dan didukung dari hasil analisis fitokimia yang mengidentifikasi adanya senyawa fenol dan flavonoid yang berperan sebagai antioksidan.

Biodiesel Synthesis of Cotton Seeds Oil (Ceibapentandra) By Chemically Transesterification Process and Ion Fragmentation of Methyl Ester Erin Ryantin Gunawan; Siska Ayu Wulandari; Emmy Yuanita; Dedy Suhendra
ALCHEMY Jurnal Penelitian Kimia Vol 10, No 2 (2014): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.10.2.528.104-115

Fossil fuel is commercial energy sources in many communities where their abundance progressively reduced and the resulting environmental pollution. Biodiesel is one alternative fuel made from vegetable which oils are suitable to replace the function of fossil fuels and environmentally friendly. Synthesis of biodiesel from cotton seeds oil was carried out by chemically ransesterification process. Composition of methyl esters in biodiesel thatwas analyzed by GC-MS are methyl palmitate (16.71%), methyl 8,11-octadecadienoic (46.45 %) and methyl linoleate (4.21 %).The highest amount of biodiesel conversion isat ratio of oil and methanol (1:1) with the catalyst 1% (weight of oil). The produced biodiesel was 93.7 %. Chemical properties of the produced biodiesel meets the standard SNI 04-7182-2006 i.e. saponification value of 120.167 mg KOH / g, acid value of 0.28 mg KOH / g and iod value 55.84g iod/100g of sample.

WAX ESTERS PRODUCTION BY ALCOHOLYSIS OF PALM OIL FRACTIONS Erin Ryantin Gunawan; Dedy Suhendra
Indonesian Journal of Chemistry Vol 8, No 3 (2008)
Publisher : Universitas Gadjah Mada

The lipase synthesis of wax esters using palm oil fractions (palm oil and palm kernel oil) and long chain alcohol as substrates was carried out. The present work focuses on the synthesis of wax esters using Lipozyme. Five parameters such as reaction time, temperature, amount of enzyme, molar ratio of substrates and various organic solvents of the reaction system were investigated. The optimum yields were achieved at the reaction temperature of 40 - 50 °C for palm oil (PO) and 40 °C for palm kernel oil (PKO) alcoholysis, a reaction time of 5 - 7 h for PO and 7 - 10 h for PKO alcoholysis, 0.15 g of enzyme for both PO and PKO alcoholysis, molar ratio at 3:1 (alcohol: PO or PKO), and the best solvent for the reactions was hexane. Percentage yields of esters obtained at these optimum reaction conditions was 83% refined, bleached and deodorized (RBD) palm oil alkoholysis and 87% for RBD palm kernel oil alcoholysis respectively

FOUR-FACTOR RESPONSE SURFACE OPTIMIZATION OF THE ENZYMATIC SYNTHESIS OF WAX ESTER FROM PALM KERNEL OIL Erin Ryantin Gunawan; Dedy Suhendra
Indonesian Journal of Chemistry Vol 8, No 1 (2008)
Publisher : Universitas Gadjah Mada

The synthesis of wax ester using refined, bleached and deodorized (RBD) palm kernel oil (PKO) and oley alcohol catalyzed by Lipozyme IM was carried out. Response surface methodology (RSM) based on a five-level, four-factor central composite rotatable design (CCRD) was used to evaluate the interactive effects of synthesis, of reaction time (5-20 h), temperature (20-50 oC), amount of enzyme (0.1-0.2 g) and substrate molar ratio (palm kernel oil to oleyl alcohol, 1:1-1:5) on the percentage yield of wax esters. The optimum condition conditions derived via RSM were reaction time 8.46 h, temperature 44.4 oC, amount of enzyme 0.182 g, substrate molar ratio 1 to 3.7. The actual experimental yield was 92.9 % under optimum condition, which good accordance to the maximum predicted value of 92.4 %.

SEPARATION AND PRECONCENTRATION OF COPPER (II) ION BY FATTY HYDROXAMIC ACIDS IMMOBILIZED ONTO AMBERLITE XAD – 4 RESIN Dedy Suhendra; W. M. Z. Wan Yunus; Md. Jelas Haron; Mahiran Basri; Sidik Silong
Indonesian Journal of Chemistry Vol 6, No 2 (2006)
Publisher : Universitas Gadjah Mada

A method of copper (II) ion preconcentration and separation from other ions by using a column containing fatty hydroxamic acids - loaded Amberlite XAD 4 resin (FHA-Amb) is described. Several factors, which affect the separation and preconcentration efficiency such as pH, sample volume, and concentration of eluent and flow rate, have been investigated. A quantitative recovery of copper (II) ion from FHA-Amb resin column was obtained using 10% HNO3 solutions as eluent with a preconcentration factor of 60. A method for separation of Cu(II) from Zn(II) and Cd(II) is proposed. A rapid sample throughput, a clean separation, a high preconcentration factor and simplicity are the main advantages in these analytical procedures.

Pelatihan Pembuatan Sabun Antiseptik Berbasis Minyak Biji Kelor pada Kelompok Wanita Tani Flamboyan Lingkar Pratama Lombok-Nusa Tenggara Barat Sri Seno Handayani; Erin Ryantin Gunawan; Dedy Suhendra; Murniati Murniati; Dhony Hermanto
Rengganis Jurnal Pengabdian Masyarakat Vol. 2 No. 2 (2022): November 2022
Publisher : Pendidikan Matematika, FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/rengganis.v2i2.239

On the West Nusa Tenggara island of Lombok, a local plant called moringa (Moringa oleifera) is frequently found. Due to its high nutritional value, this plant can be consumed in almost all of its components, particularly the leaves and seeds. With the help of Flamboyan Women Farmers Group (Kelompok Wanita Tani Flamboyan) partners, this service activity was carried out by lecturing the public on the uses of moringa plants and other local flora as antiseptic soap and providing instruction on how to make soap from moringa seed oil. The activity's external advantages include: (1) enhancing farmer group mothers' knowledge of the advantages and potential of nearby plants; (2) facilitating the need for antiseptic soap for families; (3) enhancing mothers' motivation and creativity to create independent jobs in an effort to improve the family economy; and (4) producing publications in scientific journals. According to the outcomes of the community service projects, this training activity can improve the knowledge and skills of the women of the Flamboyan Farmers Group in the production of antibacterial soap using moringa seed oil.

PEMBERDAYAAN PETANI DESA JAGO KECAMATAN PRAYA MELALUI PELATIHAN PEMBUATAN SABUN SOUVENIR BERBASIS MINYAK non edible oil Jurnal Pepadu; Murniati Murniati; Dedy Suhendra; Erin Ryantin Gunawan; Sri Seno Handayani; Dhony Hermanto
Jurnal Pepadu Vol 2 No 3 (2021): Jurnal PEPADU
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/pepadu.v2i3.2227

ABSTRAK Desa Jago merupakan salah satu desa yang ada di wilayah kecamatan Praya dengan jumlah penduduk sebanyak 9.452 jiwa, sebagian besar penduduknya adalah petani usia produktif. Pemberdayaan para petani perlu dilakukan untuk meningkatkan kesejahteran keluarga dan masyarakat terutama saat pandemi Covid-19. Namun, mereka masih kurang pengetahuan dan keterampilan yang dapat dijadikan bekal untuk merintis usaha yang bermanfaat bagi kesejahteraan keluarga dengan melihat peluang pasar yang sesuai dengan kondisi pandemi saat ini. Salah satu upaya untuk membina dan mengembangkan potensi para petani, dapat dilakukan melalui berbagai alternatif kegiatan, diantaranya berupa pelatihan pembuatan sabun souvenir berbasis minyak non edible oil. Tujuan dari pengabdian masyarakat in adalah meningkatkan pengetahuan dan keterampilan para petani dalam memanfaatkan minyak non edible oil berbahan baku lokal menjadi sabun souvenir yang bernilai jual tinggi, serta memotivasi kreativitas para petani dalam menghadapi pandemi saat ini sehingga dapat menghasilkan usaha yang bermanfaat bagi kesejahteraan keluarga dengan melihat peluang pasar yang sudah ada. Kegiatan ini dilaksanakan dalam dua tahap utama yaitu transfer pengetahuan tentang metode teknologi pembuatan sabun souvenir berbasis minyak non edible oil, serta pendampingan ptaktek pembuatan sabun souvenir. Dari hasil evaluasi kegiatan menunjukkan bahwa peserta sangat tertarik dan antusias mengikuti pemaparan dan pelatihan pembuatan sabun souvenir serta selalu aktif mengajukan pertanyaan-pertanyaan selama proses diskusi.

PEMBUATAN ARANG AKTIF DARI BATANG JAGUNG MENGGUNAKAN AKTIVATOR ASAM SULFAT DAN PENGGUNAANNYA PADA PENJERAPAN ION TEMBAGA (II) Suhendra, Dedy; Gunawan, Erin Ryantin
Makara Journal of Science Vol. 14, No. 1
Publisher : UI Scholars Hub

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Preparation of Activated Carbon from Maize Stems by Sulfuric Acids Activation and Their Application in Copper (II) Ion Sorption. Activated carbons were prepared from maize (Zea mays L.) stems by sulfuric acids activation or chemical methods. The dry maize stems are usually used as low-value energy resources in many countries, burned in the field, or discarded, which are unfavorable to environment. This motivates the investigation of producing value-added products from the dry maize stems, such as activated carbons, as well as solving some environmental problems. The preparation process consisted of sulfuric acid impregnation at different impregnation ratio followed by carbonization at 250–400 o C for 1–4 h. The results show that the impregnation ratio was 1.25, the optimum activation temperature was 300 o C and the activation time was 1 h. The sorption capacity of the activated carbon was 25.1 mg/g.

Co-Authors Abidan, Abdul Azis Adiguna, Sya’ban Putra Ali Djamhuri Alya Hadranita Utami Amida Rischia Ulfa Anggi Solehah Anwar Sulaiman Nasution Ariani, Dwi Ariani, Dwi Arlia, Erma Azumi, Baiq Miftah Baiq Anggi Yustika Leni Bali, Rizka Dhia Khalilah Dhony Hermanto Diah Miftahul Aini Dina Asnawati Emmy Yuanita Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan Erin Ryantin Gunawan, Erin Hasayangan, Angkasa Putra Hasibuan, Ahmadi Saleh Hasibuan, Zulkarnain I Made Aditha Irman Puansah Izzati, Assifa Jumaita Nopriani Lubis Jurnal Pepadu Khairani, Annisa Lely Kurniawati Mahiran Basri Mahiran Basri Maulida, Ema Md. Jelas Haron Miftahul Aini, Diah Miranda, Najwa Rosepty Murniati Murniati Murniati . Murniati Murniati Nasution, Irwan Syah Nurhidayanti . NURLAELA NURLAELA Nurlaila Agustikawati Nurlaila Agustikawati Padly, Fajar Pujana Qurba Putra Adiguna, Syaâ€™ban Putra Adiguna, Sya’ban Qurba, Pujana Rahmiati Rahmiati Ramdani, Nanila Rischia, Amida Rizka Dhia Khalilah Bali Ryantin G, Erin Saputri, Dita Ayu Sari Fania, Rosita Sari, Gita Sagita Sidik Silong Simatupang, Nuratika Siregar, Ihsan Siska Ayu Wulandari Siska Ayu Wulandari, Siska Ayu Situmeang, Nurida Sri Seno Handayani Sri Seno Handayani Sri Seno Handayani Sri Seno Handayani Sri Seno Handayani Sutan Siregar Usiana, Shilan W. M. Z. Wan Yunus Yanti, Sepia Dwi Yayuk Andayani Yulita Sari Yusril Nasution, Ahmad Zaer, Ziana Zulfiqar, Effan

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