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All Journal Jurnal Kimia Mulawarman Jurnal Kimia Riset Chimica et Natura Acta Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat IJOEP : International Journal of Ecophysiology JOURNAL OF CHEMICAL NATURAL RESOURCES (JCNaR) Journal of The Indonesian Society of Integrated Chemistry
Sovia Lenny
Departemen Kimia Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Sumatera Utara Medan
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Social Sciences

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AKTIVITAS ANTIOKSIDAN SENYAWA FLAVONOIDA DARI DAUN BENALU KAKAO (Dendrophthoe pentandra (L.) Miq.) Sembiring, Helmina Br.; Lenny, Sovia; Marpaung, Lamek
Chimica et Natura Acta Vol 4, No 3 (2016)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (180.266 KB) | DOI: 10.24198/cna.v4.n3.10920

Abstract

Penelitian ini bertujuan untuk mendeteksi senyawa fitokimia dan menguji aktivitas antioksidan ekstrak metanol, ekstrak  etil asetat, total flavonoida dan flavonoid aglikona  daun benalu kakao (Dendrophthoe pentandra (L.) Miq.). Serbuk kering daun D. pentandra (L.) Miq. (10 kg) dimaserasi dengan menggunakan metanol, ekstrak metanol diekstraksi kembali dengan etil asetat, ekstrak etil asetat dipartisi dengan n-heksana. Residu yang tersisa (total flavonoida) dihidrolisis dengan HCl 2 N sehingga diperoleh flavonoid aglikona.  Diperoleh ekstrak metanol sebanyak  830 g (8,3%), ekstrak etil asetat 108 g (1,08%), total flavonoida 45 g (0,06%) dan flavonoid aglikona 6,2 g (0,06%) dan semua ekstrak  berwarna hitam. Berdasarkan hasil skrining fitokimia yang dilakukan ekstrak metanol D. pentandra (L.) Miq.  mengandung senyawa flavonoida, tanin, terpenoid, saponin dan tidak terdeteksi adanya alkaloid. Ekstrak etil asetat mengandung senyawa flavonoida, terpenoid dan saponin dan tidak terdeteksi adanya tanin dan alkaloid. Total flavonoida hanya mengandung flavonoida dan tidak terdeteksi adanya saponin, tanin, alkaloid dan terpenoid. Ekstrak metanol, etil asetat, total flavonoida dan flavonoid aglikona daun D. pentandra (L.) Miq. memiliki aktivitas antioksidan dengan nilai IC50  berturut-turut sebesar 30,31; 36,23; 24,07 dan 18,22 mg/mL. Sedangkan asam askorbat sebagai kontrol menunjukkan nilai IC50  12,08  mg/mL. Senyawa flavonoida dari daun benalu kakao (D. pentandra (L.) Miq.) dapat berfungsi sebagai antioksidan namun aktivitasnya lebih rendah dari pada asam askorbat.
AKTIVITAS ANTIOKSIDAN SENYAWA FLAVONOIDA DARI DAUN BENALU KAKAO (Dendrophthoe pentandra (L.) Miq.) Helmina Br. Sembiring; Sovia Lenny; Lamek Marpaung
Chimica et Natura Acta Vol 4, No 3 (2016)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (180.266 KB) | DOI: 10.24198/cna.v4.n3.10920

Abstract

Penelitian ini bertujuan untuk mendeteksi senyawa fitokimia dan menguji aktivitas antioksidan ekstrak metanol, ekstrak  etil asetat, total flavonoida dan flavonoid aglikona  daun benalu kakao (Dendrophthoe pentandra (L.) Miq.). Serbuk kering daun D. pentandra (L.) Miq. (10 kg) dimaserasi dengan menggunakan metanol, ekstrak metanol diekstraksi kembali dengan etil asetat, ekstrak etil asetat dipartisi dengan n-heksana. Residu yang tersisa (total flavonoida) dihidrolisis dengan HCl 2 N sehingga diperoleh flavonoid aglikona.  Diperoleh ekstrak metanol sebanyak  830 g (8,3%), ekstrak etil asetat 108 g (1,08%), total flavonoida 45 g (0,06%) dan flavonoid aglikona 6,2 g (0,06%) dan semua ekstrak  berwarna hitam. Berdasarkan hasil skrining fitokimia yang dilakukan ekstrak metanol D. pentandra (L.) Miq.  mengandung senyawa flavonoida, tanin, terpenoid, saponin dan tidak terdeteksi adanya alkaloid. Ekstrak etil asetat mengandung senyawa flavonoida, terpenoid dan saponin dan tidak terdeteksi adanya tanin dan alkaloid. Total flavonoida hanya mengandung flavonoida dan tidak terdeteksi adanya saponin, tanin, alkaloid dan terpenoid. Ekstrak metanol, etil asetat, total flavonoida dan flavonoid aglikona daun D. pentandra (L.) Miq. memiliki aktivitas antioksidan dengan nilai IC50  berturut-turut sebesar 30,31; 36,23; 24,07 dan 18,22 mg/mL. Sedangkan asam askorbat sebagai kontrol menunjukkan nilai IC50  12,08  mg/mL. Senyawa flavonoida dari daun benalu kakao (D. pentandra (L.) Miq.) dapat berfungsi sebagai antioksidan namun aktivitasnya lebih rendah dari pada asam askorbat.
ISOLASI SENYAWA ALKALOID DARI DAUN SIDAGURI (Sida rhombifolia L.) Sovia Lenny; Tonel Barus; Evi Yoana S
JURNAL KIMIA MULAWARMAN Vol 8 No 1 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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

Abstract

The secondary metabolite compound was isolated from sidaguri (Sida rhombifolia L.) leaves. The diethylether extract was subjected to a column chromatography with a mixture of chloroform:methanol (7:3) was obtained as amorf  (59 mg). The FT-IR and 1H-NMR spectrum indicated the isolated compound was alkaloid compound.Keywords : Sidaguri (Sida rhombifolia L.), column chromatography, alkaloid
Antioxidant Activity Assay of Eucalyptus pellita Leaf Extract Sovia Lenny; Murni Suryani Lumbantoruan; Helmina Br. Sembiring
International Journal of Ecophysiology Vol. 5 No. 2 (2023): International Journal of Ecophysiology
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/ijoep.v5i2.13715

Abstract

In pharmacy, eucalyptus leaves are used for various pharmacological activities because they contain phenolic compounds. This study aims to detect phytochemical compounds and test the antioxidant activity of Eucalyptus pellita leaf extract. The dry powder of E. pellita leaves (1900 g) was macerated first with methanol solvent. The concentrated methanol extract was then subjected to partition extraction with n - hexane solvent. The methanol layer was concentrated and then partitioned with ethyl acetate solvent. Methanol extract was obtained as much as 176.75 g (9,30%), n-hexane extract 13.77 g (0.72%), and ethyl acetate extract 27.93g (1.47%). The three extracts were subjected to phytochemical screening, methanol extract and ethyl acetate extract were positive for flavonoids. These three extracts did not contain alkaloids but were positive for tannins and saponins. Antioxidant activity was tested using the DPPH (1,1 diphenyl-2-picrylhydrazyl) method with UV-vis spectrophotometer (max wavelength 517 nm). Sample concentration variations were 12.5; 25; 50; 100; and 200 ppm. Ethyl acetate extract, methanol extract and n - hexane extract have antioxidant activity with IC50 values of 6.811; 17.923; and 31.109 µg/mL, respectively. This shows that E. pellita leaf extract has very strong antioxidant activity and ethyl acetate extract has more antioxidant activity.
ANALYSIS OF TOTAL FLAVONOID CONTENT AND ANTIOXIDANT ACTIVITY ASSAY OF GUAVA VARIETY CRYSTAL (Psidium guajava L.) LEAVES EXTRACT Tarigan, Dewi Br; Lenny, Sovia; Zuhra, Cut Fatimah
Jurnal Kimia Riset Vol. 9 No. 1 (2024): June
Publisher : Universitas Airlangga, Campus C Mulyorejo, Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v9i1.57803

Abstract

The study investigates the antioxidant activity and total flavonoid compounds in leaves crystal guava, a plant rich in vitamin C and high in antioxidant activity. The research involved maceration extraction of leaves cystal guava using methanol solvent, then fractionation with ethyl acetate and n-hexane solvents in stages to obtain extracts methanol, ethyl acetat and n-hexane; thereafter extracts were subjected to phytochemical screening, total flavonoid content determination, and antioxidant activity using the DPPH method. The study found secondary metabolite compounds which is found in leaves crystal guava such as flavonoids, alkaloids, steroids, terpenoids, saponins and tannins; that ethyl acetate extract had the highest flavonoid content of 171.91 mg/L and highest antioxidant activity with IC50 value of 9.59 ppm, followed by n-hexane and methanol extracts.
Potential Inhibitory Power of Edible Starch Phosphate Film of Yellow Ivory Coconut Shoots (Cocos nucifera var. eburnea) Incorporated with Chitosan-Nisin on The Growth of Patogenic Bacteria Kurniawan, Dimas Zuhri; Zuhra, Cut Fatimah; Lenny, Sovia
Journal of The Indonesian Society of Integrated Chemistry Vol. 16 No. 1 (2024): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v16i1.33691

Abstract

Edible film can be used to package food well and improve the condition of the food, but damage to food ingredients can also occur due to bacteria, so chitosan-nisin is added as an antibacterial agent. In this research, Edible Film was made by adding 1,2,3,4 g of nisin to a 1% (w/v) chitosan solution to obtain four antibacterial agent solutions, namely 1.0% chitosan and chitosan-nisin: 0.1; 0.2; 0.3 and 0.4% (w/v), then mixed with distilled water, phosphate starch of yellow ivory coconut shoots, and sorbitol, then stirred with a magnetic stirrer, molded and dried in an oven and then tested for the antibacterial properties of the Edible film. The research results showed that Edible Film containing chitosan-nisin solution was the most potent antibacterial in inhibiting 1% chitosan solution with 0.4% nisin with the inhibition zone for each bacterium ranging between 29.9 mm, 30.6 mm. and 28.2 mm. Antibacterial activity increased with increasing concentration of chitosan-nisin solution.
Antioxidants Activity of Face Toner from Ethyl Acetate Fraction of Okra Seeds Lubis, Fatmawati; Lenny, Sovia; Br. Sembiring, Helmina
Journal of The Indonesian Society of Integrated Chemistry Vol. 16 No. 2 (2024): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v16i2.37677

Abstract

Phytochemical Screening, Determination of Total Phenolic Contents and Total Flavonoid Contents of Pod Purified Extract from Caesalpinia pulcherrima (L.) Sw. Lenny, Sovia; Surbakti, Febriyanti Br; Tarigan, Juliati Br
Journal of Chemical Natural Resources Vol. 7 No. 1 (2025): Journal of Chemical Natural Resources (JCNaR)
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jcnar.v7i1.19838

Abstract

Caesalpinia pulcherrima (L.) Sw. is traditionally used in medicine and is thought to be influenced by the presence of secondary metabolites, especially phenolic compounds and flavonoids. However, identifying the phytochemical compounds of Caesalpinia pulcherrima (L.) Sw. plants, especially on the pods, are less discussed. Here, we propose research on the identification of secondary metabolite compounds of pod-purified extract from Caesalpinia pulcherrima (L.) Sw. using phytochemical screening and also the determination of total phenolic and total flavonoid content. The extraction of Caesalpinia pulcherrima (L.) Sw. pods were processed by maceration and fractionation methods to obtain the purified extract. Total phenolic contents were determined using the Folin-Ciocalteu method. Meanwhile, total flavonoid contents were determined using the AlCl3 method. The result showed that the purified extract of Caesalpinia pulcherrima (L.) Sw. pods contained phenolics, flavonoids, alkaloids, and saponins. The total phenolic and total flavonoid content in the pod purified extract were 326.038 mg GAE/g extract and 290.026 mg QE/g extract, respectively.
Scientific Writing Coaching Class for Teachers in Sibolga City gea, saharman; Aththorick, T. Alief; Lenny, Sovia; Sihombing, Yuan Alfinsyah; Pasaribu, Khatarina Meldawati; Piliang, Averrous Fazlurrahman
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 1 (2021): ABDIMAS TALENTA : Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1127.314 KB) | DOI: 10.32734/abdimastalenta.v6i1.5103

Abstract

Referring to Ministerial Regulation of PAN-RB No. 16 of 2009 on Teacher Functional Status and Credit Score, it is clearly mentioned that one of the key components to apply teacher promotion is scientific writing (KTI). However, in fact, it was found that many teachers were independently constrained, especially in Sibolga City. As a result, the chance to get a higher rank and to be placed would be hampered. In addition, even some teachers are caught up in taking shortcuts by using the third part services to prepare their scientific writing, which of course, are not acceptable in publication ethics and academic values. In line with the results of preliminary observations made by the team, it was noticed that the teachers writing ability can be improved by providing them writing coaching class, including explanations and even training materials that need to be used in scientific writing. This writing coaching class is intended to provide teachers an opportunity to develop their skills, especially skill to write down scientific papers. Writing coaching class will be done by encouraging teachers to compose their ideas, formulating their problems, obtaining references sources, providing consultation rooms, implementing ethics and scientific publishing regulation, and selecting places where scientific papers will be published.
Utilization Conventional Market Waste on Catfish Food Production Zuhra, Cut Fatimah; Lenny, Sovia; Zaidar, Emma; Taufik, Muhammad
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 2 (2020): ABDIMAS TALENTA : Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (264.795 KB) | DOI: 10.32734/abdimastalenta.v5i2.5900

Abstract

Tamora Catfish Company as a Micro, Small and Medium Enterprise (UMKM) which one of the Universitas Sumatera Utara community service partners, used a simple microbubble technology system to increase the dissolved oxygen content in pond water in order to anticipate of the large number of die fish because of the polluted pond water, which impacted in reducing the amount of oxygen. Biofloc application was observed decreasing the ammonia content and generating natural feed. This was analyze by the team that already implemented this simple technology in the first year observation which found its successfully reduce fish mortality and increase the number of catfish. However, the catfish food is expensive because it is depend on pellet feed, so the production process costs are very high. Via a multi-year system, community service team utilizes conventional market waste as a feed in order to replace the use of costly pellet feed. The solution was starting from processing conventional market waste such as vegetables waste. It was considered because it is cheap and it needs simple machine technology to produce the feed. The machine will construct by copper and mixer in order to produce feed that suitable for catfish food. Furthermore, it also impacted to make conventional market cleaner from waste since partners collect and process the waste directly.
Co-Authors Andriayani Astuti Aththorick, T. Alief Cut Fatimah Zuhra Evi Yoana S Karo, Alyssa Zahra Br Kurniawan, Dimas Zuhri Lamek Marpaung Lamek Marpaung, Lamek Lamhot Parulian Manalu, Lamhot Parulian Lubis, Fatmawati MUHAMMAD TAUFIK Murni Suryani Lumbantoruan Pasaribu, Albert Pasaribu, Khatarina Meldawati Piliang, Averrous Fazlurrahman Saharman Gea Sembiring, Helmina Br. Sihombing, Debynati Simamora, Monojaya Simangunsong, Siska NA Sinaga, M. Zulham Efendi SUHARMAN Surbakti, Febriyanti Br Tarigan, Dewi Br Tarigan, Juliati Br Tonel Barus Yuan Alfinsyah Sihombing Zaidar, Emma