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All Journal CHEMICA Jurnal Teknik Kimia GRADIEN PHARMACY: Jurnal Farmasi Indonesia (Pharmaceutical Journal of Indonesia) Ideas: Jurnal Pendidikan, Sosial dan Budaya Dharma Raflesia : Jurnal Ilmiah Pengembangan dan Penerapan IPTEKS Molluca Journal of Chemistry Education (MJoCE) Indonesian Journal of Community Empowerment and Service Aceh International Journal of Science and Technology Andromeda: Jurnal Pengabdian Masyarakat Rafflesia Bencoolen Journal of Pharmacy Rafflesia Journal of Natural and Applied Sciences (RJNAS) Jurnal Abdimas Bencoolen
Devi Ratnawati
Department Of Chemistry Faculty Of Mathematics And Natural Sciences Universitas Bengkulu
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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PRODUKSI BRIKET DAN KOMPOS DARI LIMBAH CANGKANG DAN TANDAN KOSONG KELAPA SAWIT DI DESA GIRI MULYA BENGKULU UTARA Devi Ratnawati; Morina Adfa; Eni Widiyati
DHARMA RAFLESIA Vol 15, No 2 (2017): DESEMBER
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v15i2.4056

Abstract

The purpose of the program IbM are: (a) training waste processing of palm oil and corn as an energy (b) accompanying ways of processing and manufacturing of palm oil waste products on home industry.The implementation of the program includes improvement of knowledge and skills, demonstrations and coaching as well as technology training science applied sewage treatment production of palm oil for processing into brickets and organic fertilizers which high economic value. From some of the activities that have been done, the community was very enthusiastic in participating in these activities, especially onprocessingpalm oil empty fruit bunches and shells into briquettes and organic fertilizers.Keywords: palm oil waste, brickets, empty fruit bunches
DIVERSIFIKASI DAN PENANGANAN PASCA PRODUKSI OLAHAN IKAN DI DESA PADANG JAYA BENGKULU UTARA UNTUK MENINGKATKAN NILAI EKONOMI DAN PENDAPATAN MASYARAKAT Devi Ratnawati; Agus Martono; Hadi Putranto; Devi Rizanty
DHARMA RAFLESIA Vol 12, No 2 (2014): DESEMBER
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v2i12.3428

Abstract

The first aim of this activity is giving knowledge to farmer society of fish specially Unit Pengolahan Ikan ( UPI) Melati I in Padang Jaya Village North Bengkulu aboutdiversification of multifarious product which have higher level economic value. Thesecond aim is giving processing practice of some alternative multifarious fish basedproduct to be industrial product which have high economic value. It is also using naturalpickling method, so that it is a good product for healthy life. The practice also givestraining in making safe packaging and product marketing. While, special target is toimprove knowledge of breeder of fish specially Unit Pengolahan Ikan (UPI) Melati I asparticipant of training about diversified multifarious of fish product that having higherlevel economic value and practice some alternative product of fish become multifariouslyof industrial product which have value sell economical, like fish rengginang, cryspy fishbaby and fish of salai. Including handling of after production ie. marketing and packaging.This activity walk better, its product even also have earned to be marketed out of DesaPadang Jaya, ie. Bengkulu town and Jakarta, and become typical pledge present of desa Padang Jaya. Request of this produst even also mount, this matter because of its producthave registering PIRT and get lawful lable so that society feel safe to consuming it.Keywords: Diversification, fish processing, UPI Melati I, Padang Jaya
Pembentukan Identitas Tionghoa Muslim di Kalangan Persatuan Islam Tionghoa Indonesia Semarang Devi Ratnawati; Nurhadi Nurhadi; Abdul Rahman
Ideas: Jurnal Pendidikan, Sosial dan Budaya Vol 8 No 4 (2022): Ideas: Pendidikan, Sosial, dan Budaya (November)
Publisher : Ideas Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32884/ideas.v8i4.998

Abstract

The New Order government encouraged ethnic Chinese Indonesians as the local population, resulting new identity as Chinese Muslims, then the group formed PITI. This research is analyzing the forming of Chinese Muslim socio-cultural identity among PITI from the perspective of Tajfel and Turner's social identity theory. The descriptive qualitative research method used in this research, and the data obtained from semi-structured in-depth interviews, observations, and documentation and/or literature studies. The results showed that Chinese Muslims tried to maintain and gain a positive social identity. It can be seen from individual and collective efforts to form different socio-cultural identities, some Muslim Chinese identify Chinese socio-cultural, some identify Javanese socio-cultural.
Green Synthesis of Sulfonated Activated Carbon from Palm Kernel Shell as Potential Catalyst for Hydrolysis of Palm Bunch Cellulose Totok Eka Suharto; Cindy Wulandari; Dwita Oktiarni; Devi Ratnawati; Ibdal Satar
CHEMICA: Jurnal Teknik Kimia Vol 9, No 2 (2022): August 2022
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v9i2.24511

Abstract

Sulfonated activated carbon (SAC) is one of green catalysts that has been successfully synthesized from palm shell waste. The SAC catalysts have been tested in the hydrolysis of cellulose of palm bunch to simple sugar. The SAC catalysts were prepared from palm shell waste by converting to activated carbon followed by sulfonating step. The SAC catalysts were characterized by using XRD, SEM, FTIR and gravimetric methods. The SAC catalysts show as porous amorphous materials and have acidic properties, a prerequisite for good catalytic activity. Preliminary catalytic tests showed that the SAC catalysts can be used for the hydrolysis of cellulose from palm bunch waste that was shown by the existence of reducing sugar in the liquid product of hydrolysis.
Pembuatan Virgin Coconut Oil (VCO) Dengan Metode Enzimatis Dan Fermentasi Teja Dwi Dwi Sutanto; Devi Ratnawati; Agus Martono HP
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 1 No. 1: December 2021
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (481.665 KB) | DOI: 10.33369/icomes.v1i1.18978

Abstract

Virgin coconut oil (VCO) is coconut oil that contains medium chain fatty acids (MCFA) which are easily broken down by the body in very high amounts. Besides that, VCO also has very high antioxidant content such as tocopherol and beta-carotene. This PPM activity aims to provide VCO Making Training with the Enzymatic Method with pineapple fruit extract and fermentation with baker's yeast in the community of RT 12 RW 03 Pematang Governor Village, Muara Bangkahulu District, Bengkulu City. The activity began with a lecture followed by a discussion and practice of making VCO with enzymatic and fermentation methods. The results of observations in the field indicate that the target community of this PPM activity is very enthusiastic to take part in this activity because they feel they have gained additional new knowledge about how to make VCO which can complement their knowledge of the known VCO making technique, namely the fishing method. With the knowledge of making VCO taught in this activity, the target community will be able to have alternative methods for making VCO other than what has been known so far with easily obtained equipment. Keywords:   VCO; MCFA; antivirus; enzymatic; Fermentation 
Study on The Potency of Methanol Extracts From Xanthosoma nigrum Stellfeld As Natural Anti Oxidant by Thiobarbituric Acid Method Devi Ratnawati; Lusiana .; Agus Martono; Wahidah Fitriyanti
Aceh International Journal of Science and Technology Vol 2, No 3 (2013): December 2013
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (475.632 KB) | DOI: 10.13170/aijst.2.3.1007

Abstract

Abstract- In this research Xanthosoma nigrum Stellfeld (the Purple yam) was selected as experimental material. This plant was collected from Rejang Lebong region, Bengkulu Province. Methanol extract 96% from stem of purple yam was studied its anti-oxidant activity in various concentrations with α-tocopherol (200 ppm) as standard of antioxidant. Antioxidant activity was determined using Thiobarbituric Acid (TBA) method. Linoleic acid was oxidized at 40 ºC for seven days with or without extract and the final product malondialdehyde (MDA) was reacted with thiostembituric acid to be of red colored complex (MDA-TBA) and was then measured by UV-VIS spectrophotometer at λ 532 nm. Stem extract of purple yam with concentration of 100 ppm, 150 ppm, 200 ppm and 300 ppm respectively had the inhibition of 19.32%, 21.85%, 29.47%, and 31.05%.  α-Tocopherol as positive control which showed inhibition ability of 85.14% at 200 ppm. Based on the result obtained in this study, the stem’s extract of Purpel yam plant showed that antioxidant activity was lower than α-tocopherol. Keywords : Xanthosoma nigrum; Stellfeld; MDA; Antioxidant.
The effectiveness test of sunscreen cream with raw materials of coconut oil and active ingredients of Soursop (Annona Muricata L) leaf and Bay (Eugenia Polyantha Wight) leaf ethanol extracts Eni Widiyati; Devi Ratnawati; Dyah Fitriani; Lesta Nurul Jayanti; Nadia Arum Pangestu
RAFFLESIA JOURNAL OF NATURAL AND APPLIED SCIENCES Vol. 2 No. 1 (2022): April
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rjna.v2i1.22764

Abstract

The purpose of this study was to determine the effectiveness of cream made  of coconut oil as a raw  material and the active ingredients of soursop leaf ethanol extract  and bay leaf ethanol extract as sunscreens. The cream was made by mixing the hot (700C) water phase (glycerin, distilled water, methyl paraben, and triethanolamine = TEA) and the hot (700C) oil phase (s tearic acid, coconut oil, cetyl alcohol, propyl paraben, andlanolin). After the cream was formed, the active ingredients of soursop leaf ethanol extract and bay leaf ethanol  extract were added. A cream without an active ingredient was also made as a comparison.  The produced cream was determined to have ultraviolet (UV) radiation absorption by using a UV spectrophotometer. The resulting absorbance value was used to calculate the value of the sun protection factor (SPF) using the Mansur equation. The results showed that creams without active ingredients had the lowest SPF values. With an SPF of 3.048, the cream with 2% active ingredients and 2.5% bay leaf extract was labeled as a low-performance sunscreen cream
Penentuan Adanya Flavonoid, Uji Efektivitas Tabir Surya Ekstrak dan Krim Berbahan Aktif Ekstrak Etanol Daun Jambu Biji (Psidium guajava, Linn) dan Benzofenon-3 Eni Widiyati; Devi Ratnawati; Dyah Fitriani; Fadilah Sari
RAFFLESIA JOURNAL OF NATURAL AND APPLIED SCIENCES Vol. 3 No. 1 (2023): April
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rjna.v3i1.28575

Abstract

ABSTRAK: Tujuan dari penelitian ini adalah menentukan adanya kandungan flavonoid pada daun jambu biji (Psidium guajava Linn), menguji efektivitas ekstrak dan krim tabir surya berbahan aktif ekstrak etanol daun jambu biji dan benzofenon-3. Daun jambu biji ditentukan adanya kandungan flavonoid menggunakan pereaksi Shinoda (Mg dan HCl pekat). Ekstrak daun jambu biji dibuat dengan cara maserasi menggunakan pelarut etanol teknis. Efektivitas ekstrak sebagai tabir surya ditentukan dengan menghitung nilai SPF ekstrak. Ekstrak yang dihasilkan dipergunakan sebagai bahan aktif pada pembuatan krim kosmetik dengan metode emulsifikasi. Krim yang dihasilkan ditentukan sifat-sifatnya seperti pH, serapan radiasi UV, nilai SPF dan efektivitas krim. Hasil penelitian menunjukkan bahwa daun jambu biji positif mengandung flavonoid. Ekstrak daun jambu biji (konsentrasi ekstrak 200 ppm) memiliki nilai SPF sebesar 6,765 (termasuk tabir surya efektivitas rendah), dan berpotensi sebagai bahan aktif tabir surya. Krim tabir surya berbahan aktif ekstrak daun jambu biji 0,5% memiliki nilai SPF sebesar 0,1648. Jika konsentrasi ekstrak ditingkatkan menjadi 1% maka nilai SPF juga meningkat menjadi 0,4249. Menurut standar FDA, kedua krim tersebut belum memiliki aktivitas sebagai tabir surya. Penambahan 1% benzofenon-3 ke dalam krim berbahan aktif ekstrak daun jambu biji 0,5%, akan meningkatkan nilai SPF (SPF = 5,5858), sehingga krim tabir surya menjadi lebih efektif dalam melindungi kulit dari paparan radiasi ultraviolet (UV).
Effect of catalyst and solvent on the Claisen-Schmidt condensation reaction between benzaldehyde derivatives and 2-acetylpyridine Ratnawati, Devi
BENCOOLEN JOURNAL OF PHARMACY Vol. 4 No. 2 (2024): Oktober
Publisher : UNIB PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/bjp.v4i2.37449

Abstract

This study was conducted to observe the effect of catalyst and solvent on the Claisen-Schmidt condensation reaction between benzaldehyde derivatives (compound 1) and 2-acetylpyridine. Chalcones, as compounds with various biological activities, are the focus in the fields of medicine and pharmacology. Efficient and environmentally friendly synthesis methods are essential in the production of these compounds. In this study, the Claisen-Schmidt condensation reaction was used to synthesize the target chalcones. Variations of base catalysts (NaOH and KOH) and solvents (ethanol and methanol) were evaluated to optimize the yield and efficiency of the reaction. The results showed that the use of KOH as a catalyst produced compound 2 with an abundance of 60.47%, which was associated with the stronger nucleophilic nature of hydroxide ions in KOH. In addition, ethanol proved to be a more effective solvent than methanol in this reaction.
Diversification of Products and Alternative Energy from Guava Fruit Waste (Syzygium Malaccense) in Kemumu Village, North Bengkulu Regency Ratnawati, Devi; Martono Hadi Putranto, Agus; Dwi Sutanto, Teja
DHARMA RAFLESIA Vol 22 No 2 (2024): DESEMBER (ACCREDITED SINTA 5)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v22i2.37256

Abstract

Tujuan pelaksanaan program pengabdian pada masyarakat berbasis riset ini adalah meningkatkan pengetahuan dan keterampilan masyarakat dalam mengolah jambu bol menjadi minuman kesehatan dan memanfaatkan hasil sampingnya sebagai briket arang untuk sumber energi alternatif yang bernilai ekonomis. Pelaksanaan kegiatan pengabdian ini dibagi menjadi 4 tahap yaitu: perencanaan program, pelaksanaan, observasi dan evaluasi, serta refleksi. Pada pelaksanaan program, dilakukan implementasi program kegiatan yang meliputi peningkatan pengetahuan dan keterampilan, demonstrasi dan pembinaan beserta pelatihan teknologi buah jambu bol menjadi minuman kesehatan dan briket arang. Program ini berhasil meningkatkan pengetahuan dan keterampilan masyarakat Desa Kemumu dalam memanfaatkan jambu bol (Syzygium malaccense) menjadi minuman kesehatan dan briket arang, yang memberikan alternatif energi terbarukan serta peningkatan ekonomi lokal. Tingkat keberhasilan adopsi teknologi tercermin dari kemampuan peserta mereplikasi prosedur diversifikasi produk tanpa pendampingan langsung.
Co-Authors Abdul Rahman Afriana Mayang Sentani Agus Martono Agus Martono Agus Martono Hadi Putranto Agus Martono HP Asmiyenti Djaliasrin Djalil Charles Banon Cindy Wulandari Devi Rizanty Dwi Sutanto, Teja Dwita Oktiarni Dyah Fitriani Eni Widiyati Eni Widiyati Evi Maryanti Fadilah Sari Ghufira Ghufira Hadi Putranto Ibdal Satar Lesta Nurul Jayanti Lusiana . Martono Hadi Putranto, Agus Morina Adfa Nadia Arum Pangestu Nurhadi, Nurhadi Ria Nurwidiyani Sari, Yanci Novita Syalfinaf Manaf Teja Dwi Sutanto Totok Eka Suharto Triawan, Deni Agus Wahidah Fitriyanti Wiranti Sri Rahayu