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All Journal Sainteks CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Natur Indonesia Jurnal Ilmiah KORPUS ALKIMIA : Jurnal Ilmu Kimia dan Terapan Stannum : Jurnal Sains dan Terapan Kimia Indonesian Journal of Chemistry and Environment Aptekmas : Jurnal Pengabdian Kepada Masyarakat
Ade Oktasari
Universitas Islam Negeri Raden Fatah Palembang
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Senyawa Antimalaria dari Jamur Endofitik Tumbuhan Sambiloto (Andographis paniculata Nees) Elfita, Elfita; Muharni, Muharni; Munawar, Munawar; Salni, Salni; Oktasari, Ade
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (85.93 KB) | DOI: 10.31258/jnat.13.2.123-129

Abstract

Plants have been the chief source of compounds of medicine for thousand of years. Plants are also the source ofmany medicines for the majority of the world’s population. The role of biotechnology is very important for multiplying,conserving the spesies, and enhancing the production of secondary metabolites. Endophytic are microbes thatinhabit plants are currently considered to be a wellspring of novel secondary metabolites offering the potensial formedical and industrial exploitation. Plants with ethnobotanical history, for example sambiloto (Andographispaniculata Nees) are likely candidates for finding bioactive compounds. Isolation begin with cultivation of Aspergillusflavus fungi in 2 liter of Potato Dextrose Broth media for four weeks. Media is extracted into the solvent n-hexaneand ethylacetate following by evaporation. Ethylacetate extracts were separated by chromatography techniquesin order to get pure compound in the form of white crystal. Phytochemical tests showed that the isolated compoundis alkaloid. The molecular structure of the isolated compound was determined based on spectroscopic data,including UV, IR, 1H-NMR, 13C-NMR, HMQC, and HMBC spectrum. The compound was determined as7-hydroxypiranopiridin-4-on with molecule formula C8H7NO2 (Mr=149). The compound has antimalarial activityagainst Plasmodium falciparum 3D7, with IC50 values 0,201 μM.
Biji Kebiul (Caesalpinia Bonduc L. Roxb) sebagai Adsorben Logam Besi (Fe) Muhammad Salman Alfarisi; Ade Oktasari; Dwi Fitriyani
Sainteks Vol 18, No 2 (2021): Oktober
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/sainteks.v18i2.12689

Abstract

Logam berat merupakan limbah pencemar yang sulit terdegradasi di alam serta membutuhkan waktu yang lama untuk terurai. Proses adsorpsi dapat digunakan sebagai penanganan untuk logam berat Fe yang merupakan salah satu logam berat yang berasal dari limbah. Tujuan penelitian ini untuk mengetahui pengaruh waktu kontak serta konsentrasi logam Fe terhadap adsorben biji kebiul. Penelitian ini menggunakan metode Chesson untuk mengetahui kadar selulosa, hemiselulosa dan lignin dengan hasil uji pada biji kebiul dengan nilai rata-rata secara berurutan sebesar 19,53%, 23,3%, dan 8,97% dan kulit buah kebiul sebesar 30,84%, 25,85% dan 14,76%. Hasil penelitian variasi waktu kontak 5, 10, 30, 50, 70, 100 menit waktu optimum tercapai pada menit ke-10 dengan Fe yang teradsorpsi sebesar 2,362 mg/g. Pada variasi konsentrasi logam Fe mencapai titik optimum pada 60 ppm dengan variasi 15, 35, 60, 80, 90, 100 ppm serta waktu kontak 10 menit dengan nilai kadar adsorpsi logam Fe 99,68%.
PEMANFAATAN CANGKANG BUAH KARET (Hevea brasiliensis) SEBAGAI ADSORBEN LOGAM BERAT TIMBAL (Pb) Diana Aminin; Ade Oktasari; Fitria Wijayanti
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 9 No 1 (2021): Cakra Kimia (Indonesian E-Journal of Applied Chemistry)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

ABSTRAK: Cangkang buah karet saat ini tidak banyak dimanfaatkan. Cangkang buah karet dapat berpotensi sebagai adsorben karena memiliki kandungan selulosa. Selulosa mempunyai gugus hidroksil dan karboksil yang dapat berikatan dengan ion logam. Penelitian ini bertujuan untuk mengetahui pengaruh variasi waktu kontak dan konsentrasi awal larutan Pb terhadap adsorben cangkang buah karet. Semakin lama waktu kontak maka kapasitas adsorpsinya akan semakin meningkat. Waktu optimum adsorpsi Pb oleh adsorben cangkang buah karet terjadi pada menit ke -120 waktu kontak dengan nilai kapasitas adsorpsi 3,9866 mg/g. Konsentrasi awal larutan Pb juga berpengaruh terhadap nilai kapasitas adsorpsi dan persentase logam Pb yang akan teradsorp oleh adsorben cangkang buah karet. Semakin besar konsentrasi awal larutan Pb maka kapasitas dan persentase penyerapannya juga semakin meningkat. Kapasitas adsorpsi dan persentase penyerapan pada konsentrasi 120 ppm diperoleh nilai terbaik yaitu 11,836 mg/g dan 98,64 %. ABSTRACT: Rubber fruit shells at this time not widely used. Rubber fruit shells have potential as adsorbent because they contain cellulose. Cellulose has hydroxyl and carboxyl grous which can bind to metal ions. This study aims to determine the effect of variations in contact time and initial concentration of Pb solution on the rubber fruit shell adsorbent. The longer the contact time, the adsorption capacity will increase. The optimum time of Pb adsorpsion by rubber fruit shell adsorbent occurred at 120 minutes of contact time an adsorption capacity of 3,9866 mg/g. The initial concentration of Pb solution also affects the value of the adsorption capacity and the percentage of Pb metal that will be adsorbed by the rubber fruit shell adsorbent. The greater the initial concentration of the Pb solution, the greater its absorption capacity and percentage. The best values ??for adsorption capacity and absorption percentage at 120 ppm were 11.836 mg/g and 98.64 % respectively.
KEKERASAN DALAM ROMAN ANGKATAN 20-an Ade Oktasari; Sarwit Sarwono; Fina Hiasa
Jurnal Korpus Vol 5, No 3: DESEMBER 2021
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/jik.v5i3.19706

Abstract

Penelitian ini membahas tentang Kekerasan Dalam Roman Angkatan 20-an. Metode yang digunakan dalam penelitian ini adalah metode desktiptif kualitatif dengan analisis teks. Penelitian ini bertujuan untuk mengkaji roman angkatan 20-an menggunakan pendekatan sosiologi sastra dari sisi isi karya sastra. Data dalam penelitian ini berupa kutipan-kutipan kalimat ataupun paragraf yang mencerminkan tindak kekerasan dalam roman angkatan 20-an. Teknik yang digunakan dalam pengumpulan data adalah teknik baca dan tulis. Teknik analisis data yang digunakan dalam penelitian ini yaitu membaca roman angkatan 20-an, menandai dan mencatat, mengidentifikasi, menggolongkan, menganalisis, mendeskripsikan dan membuat kesimpulan. Hasil penelitian ini menunjukakan bahwa: terdapat dua bentuk tindakan kekerasan dalam roman-roman angkatan 20-an, yaitu kekerasan verbal dan kekerasan fisik. Bentuk kekerasan verbal dalam roman angkatan 20-an ini berupa pengancaman, membentak, umpatan, berteriak keras, memanipulasi, memfitnah, pembatasan, memprovokasi, menuduh, pemaksaan, dan mencemooh. Sementara untuk bentuk kekerasan fisik dalam roman angkatan 20-an ini berupa pemukulan, penelantaran anak, eksploitasi anak, pembunuhan, pengabaian, penghilangan harta benda, pemukulan, perkelahian, dan penganiayaan. Terdapat latar sosial budaya dalam roman angkatan 20-an meliputi: (1) kebudayaan, (2) ekonomi, dan (3) kekuasaan.
PEMANFAATAN CANGKANG BUAH KARET (Hevea brasiliensis) SEBAGAI ADSORBEN LOGAM BERAT TIMBAL (Pb) Diana Aminin; Ade Oktasari; Fitria Wijayanti
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 10 No 1 (2022): Cakra Kimia (Indonesian E-Journal of Applied Chemistry)
Publisher : Graduate Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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

Abstract

ABSTRAK: Cangkang buah karet saat ini tidak banyak dimanfaatkan. Cangkang buah karet dapat berpotensi sebagai adsorben karena memiliki kandungan selulosa. Selulosa mempunyai gugus hidroksil dan karboksil yang dapat berikatan dengan ion logam. Penelitian ini bertujuan untuk mengetahui pengaruh variasi waktu kontak dan konsentrasi awal larutan Pb terhadap adsorben cangkang buah karet. Semakin lama waktu kontak maka kapasitas adsorpsinya akan semakin meningkat. Waktu optimum adsorpsi Pb oleh adsorben cangkang buah karet terjadi pada menit ke 120 waktu kontak dengan nilai kapasitas adsorpsi 3,99 mg/g. Konsentrasi awal larutan Pb juga berpengaruh terhadap nilai kapasitas adsorpsi dan persentase logam Pb yang akan teradsorp oleh adsorben cangkang buah karet. Semakin besar konsentrasi awal larutan Pb maka kapasitas dan persentase penyerapannya juga semakin meningkat. Kapasitas adsorpsi dan persentase penyerapan pada konsentrasi 120 ppm diperoleh nilai terbaik yaitu 11,84 mg/g dan 98,64%. ABSTRACT: Nowdays, rubber fruit shells is usually left as waste and not used for applications. Rubber fruit shells have potential as adsorbent because they contain cellulose. Cellulose has hydroxyl and carboxyl grous which can bind to metal ions. This study aims to determine the effect of variations in contact time and initial concentration of Pb solution on the rubber fruit shell adsorbent. The longer the contact time, the adsorption capacity will increase. The optimum time of Pb adsorpsion by rubber fruit shell adsorbent occurred at 120 minutes of contact time an adsorption capacity of 3,99 mg/g. The initial concentration of Pb solution also affects the value of the adsorption capacity and the percentage of Pb metal that will be adsorbed by the rubber fruit shell adsorbent. The greater the initial concentration of the Pb solution, the greater its absorption capacity and percentage. The best values ??for adsorption capacity and absorption percentage at 120 ppm were 11.84 mg/g and 98.64%.
Antioxidant Activity of Uli Banana Peel Extract (Musa x Paradisiaca L. AAB) Fennia Ade Heriani; Suci Permata Sari; Ade Oktasari
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 2 (2021): Oktober 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i2.2386

Abstract

Banana plants are native to Indonesia wich are easy to find and have various benefits ranging from roots, stems, fruits until peel. Uli banana (Musa x Paradisiaca L. AAB) is one kind of processed banana that is easy to find. The study aimed to determine the antioxidant activity of banana peel extract of uli (Musa x Paradisiaca L. AAB) wich was carried out by maceration using n-hexane and ethanol solvents then fractionated with ethyl acetate and distilled water. Phytochemical screening showed that the uli banana peel extract contained flavonoids and tannins. Antioxidant activity was measured by using UV-Vis Spectrophotometry with the DPPH (2-2, diphenyl-1-picrylhydrazyl) method and IC50 (Inhibitory Concentration) test parameters. The results showed that the antioxidant activity of IC50 was 114.86 µg/ml which was classified as moderate antioxidant intensity.
Pemanfaatan Kulit Kakao Adsorben Sebagai Pemurnian Minyak Goreng Bekas Rini Marlina; Ade Oktasari; Rohmatullaili Rohmatullaili
Stannum : Jurnal Sains dan Terapan Kimia Vol 4 No 1 (2022): April 2022
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v4i1.2638

Abstract

Cooking oil, triglycerides that is liquid at room temperature, is one of important foodstuffs. Repeated use of cooking oil might decrease the quality of the oil and leads to negative impacts on health. An alternative method to treat used cooking oil is adsorption with cacao shell. This present study aims to find out the influences of adsorbent and size variation of cacao peels as the adsorbent on the reduction of free fatty acid, peroxide numbers and water content in used cooking oil. The test parameters of this study were the reduction of free fatty acids by alkalimetric titration; peroxide number by iodometric titration; and content of water by oven-drying method. In the present study, cacao nibs were used as an absorbent to reduce the levels of free fatty acid, water, and peroxide number with variety sizes of the particle, such as 100 mesh and 120 mesh: and 8-hour contact time. The results of the present study indicated a decrease in free fatty acid from 0,448% to 0,327% dan 0,278%; the initial water content of 0,020% decreased to 0,010% and 0,009%; the peroxide number changed from 15,3 meq O2/kg to 3,25 meq O2/kg and 1,25 meq O2/kg. Based on the results, the absorbent that has the optimum adsorption is the 120 mesh particle size of adsorbent.
Antioxidant Activity Testing of Extract Kweni Peel (Mangifera odorata Griff) Yolanda Dwi Lestari; Suci Permatasari; Ade Oktasari
Indonesian Journal of Chemistry and Environment Vol 3, No 2 (2020): DECEMBER 2020
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (685.361 KB) | DOI: 10.21831/ijce.v3i2.43508

Abstract

This research aims to test the antioxidant activity of extract kweni peel (Mangifera odoratta Griff). The antioxidant testing was performed by maceration using the solvents of n-hexane and ethanol 96% after that it was fractioned using ethyl acetate solvent. The phytochemical tests yield positive results from ethyl acetate extract were flavonoids and tannins. The antioxidant testing was carried out using the DPPH method (2,2, diphenyl-1-picrylhydrazyl) based on the inhibition concentration test parameters (IC50). The result showed that the antioxidant activity (IC50) found to be 169.43 µg/mL which was classified as moderate antioxidant activity intensity. Therefore, it can be concluded that the extract of kweni peel (Mangifera odoratta Griff) has potential antioxidant activity that could be used as an inhibitor of free radicals.
Kulit Kacang Tanah (Arachis hypogaea L.) sebagai Adsorben Ion Pb(II) Oktasari, Ade
ALKIMIA Vol 2 No 1 (2018): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (303.485 KB) | DOI: 10.19109/alkimia.v2i1.2258

Abstract

An experiment on Pb (II) metal ion adsorption using peanut (Arachis hypogea L.) shell without activation (KK), acid-activated (KKA), and base-activated (KKB) has been conducted. Peanut shell powder was activated using H3PO4 and KOH to improve adsorption effectivity and capacity. Characterization results using FT-IR spectrophotometer showed peak at 3410 and 2901 cm-1 indicated OH dan CH aliphatic from framework of cellulose. Optimum condition of Pb(II) adsorption for KK, KKA and KKB was occurred at the same optimum pH, that was pH 5, with contact time 60, 90 and 70 min, respectively. The adsorption kinetic parameter of Pb(II) ion for KK, KKA, and KKB followed pseudo second order kinetic with rate constants (k) in order of 12.279, 4.149, and 32.258 g mmol-1 min-1, with maximum adsorption capacity based on Langmuir isotherm model of 0.598, 0.505, and 0.622 mmol g-1, and adsorption energy of 26.735, 25.789, and 29.245 kJ mol-1, respectively. The results indicated that KOH-activated peanut (Arachis hypogea L.) shell has good adsorption affinity for Pb(II) with highest adsorption capacity compare to those from non-activated and acid-activated.
PENGENALAN ASAP CAIR DARI HASIL PIROLISIS TEMPURUNG KELAPA SEBAGAI PENGAWET TAHU DI GAPOKTAN SABOLIO SUNGAI DUA BANYUASIN Ade Oktasari; Fitria Wijayanti; Riska Ahsanunnisa; Susi Arianti
Aptekmas Jurnal Pengabdian pada Masyarakat Vol 6 No 2 (2023): Aptekmas Volume 6 Nomor 2 2023
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36257/apts.v6i2.4950

Abstract

Banyuasin is the largest coconut producing area in South Sumatra, but the coconut waste has not been utilized properly by the community. The introduction of liquid as soon as possible to the Sabolio farmer group aims to provide education to the public regarding alternatives to processing coconut shell waste into tofu preservatives which will have a sale value in the community. This counseling was carried out based on a questionnaire that had been given to the public regarding the use of food preservatives, especially tofu. So far, people only use natural preservatives in the form of salt which only lasts a short time without using a refrigerator. Therefore, a natural preservative product is produced to be able to extend the shelf life of tofu outdoors. Visits in community service were carried out three times attended by 22 peoples, the majority of which were attended by mothers.
Co-Authors Diana Aminin Diana Aminin Dwi Fitri Yani Elfita Elfita Fennia Ade Heriani Fina Hiasa Fitri Oviyanti Muhammad Salman Alfarisi Muharni Muharni Munawar Munawar Rini Marlina Riska Ahsanunnisa Rohmatullaili Rohmatullaili Salni Sarwono, Sarwit Suci Permata Sari Suci Permata Sari Susi Arianti Yolanda Dwi Lestari