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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

Penelitian ini bertujuan untuk mendeteksi senyawa fitokimia dan menguji aktivitas antioksidan ekstrak metanol, ekstrakÂ etil asetat, total flavonoida dan flavonoid aglikonaÂ 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.Â Diperoleh ekstrak metanol sebanyakÂ 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 ekstrakÂ berwarna hitam. Berdasarkan hasil skrining fitokimia yang dilakukan ekstrak metanol D. pentandra (L.) Miq.Â 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 IC50Â berturut-turut sebesar 30,31; 36,23; 24,07 dan 18,22 mg/mL. Sedangkan asam askorbat sebagai kontrol menunjukkan nilai IC50Â 12,08Â mg/mL. Senyawa flavonoida dari daun benalu kakao (D. pentandra (L.) Miq.) dapat berfungsi sebagai antioksidan namun aktivitasnya lebih rendah dari pada asam askorbat.

Use of milling equipment goat filth as fertilizer which mixed with dolamits in the village persadanta Scub-District Barusjahe Districts Karo Br Sembiring, Helmina; Ginting, Junedi
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

This community service aims to increase insight into the use of goat manure as fertilizer mixed with dolomite with very minimal expenditure of money using equipment provided by the USU Community Service Team in 2019 which was carried out in Persadanta Village, Barusjahe District, Karo District. The specific target of this service is to increase the productivity of agricultural products related to the use of fertilizers and be able to sell them to other communities, so as to increase community income for the achievement of a prosperous community, especially farmer groups in the village. So far, the people directly use goat manure as fertilizer for their plants. This is very detrimental to the community because the process is long to be able to become fertilizer and reduced nutrient elements that are poured into plants openly. Besides the use of dolomite mixed with goat manure is very good because dolomite is very much and easily obtained in Tanah Karo. Therefore, it is necessary to give insight and knowledge to the community, especially the Rumah Rih Hamlet Village Group Persadanta Village about the use of goat manure mixed with dolomite. So that people who have been buying fertilizer at a high price can manage it themselves by using the goat manure grinding equipment with the method to be implemented, namely counseling, training, direct practice and work evaluation.

Aktivitas Antibakteri dan Antioksidan Minyak Atsiri Daun Asam Jungga (Citrus jambhiri Lush) Helmina Br. Sembiring
Chimica et Natura Acta Vol 6, No 1 (2018)
Publisher : Departemen Kimia

Penelitian ini bertujuan untuk menganalisis senyawa kimia yang terdapat pada minyak atsiri daun asam jungga (Citrus jambhiri Lush) serta menguji aktivitas antioksidan dan antibekteriminyak atsiri tersebut. Minyak atsiri daun asam jungga diisolasi dengan metode hidrodestilasi menggunakan alat Stahl. Minyak atsiri diperoleh sebanyak 3,6 g (0,8%) dari 450 g serbuk kering daun asam jungga. Berdasarkan analisis GC-MS yang dilakukan minyak atsiri daun asam jungga memiliki 10 senyawa kimia, namun sebanyak 9 senyawa yang dapat diinterpretasi. Kesembilan senyawa kimia tersebut adalahγ-terpinen (36,67%), toluena (18,15%), β-osimen (9,35%), 1-metil-2-(1-metiletil)-benzena (8,85%), limonen (8,78%), β-pinen (7,80%), germasren (6,39%). α-thujen (1,69%) dan 2,3,5-trimetil-1,3,6-heptatriena (1,41%).Aktivitas antioksidan minyak atsiri daun asam jungga diuji berdasarkan metode penangkapan radikal bebas DPPH (2,2–diphenyl-1-picrylhydrazyl) dan aktivitas antibakteri diuji berdasarkan metode difusi kertas cakram. Minyak atsiri daun asam jungga memiliki aktivitas antioksidan dengan nilai IC50 sebesar 52,14 µg/mL sedangkan asam askorbat sebagai pembanding memiliki nilai IC50 sebesar 12.08 µg/mL dan aktivitas antibakteri dengan kategori sedang terhadap bakteri Bacillus cereus dan Eschercia coli pada konsentrasi 40% (v/v) dengan zona bening masing-masing sebesar 14,7 dan 14,4 mm.

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

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.

Analysis of Methamphetamine Using Necrophagous Insects For Forensic Entomotoxicology Applications Yendri Nofira; Muhammad Taufik; 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.v5i2.13387

The high use of methamphetamine (MA) has resulted in many cases of overdose leading to death, where bodies are generally found after several days which complicates the investigation so that a forensic entomotoxicological analysis using insects is carried out. The use of necrophagous insects was chosen because necrophagous insects such as maggots were at the crime scene. Maggot was then analyzed using Gas Chromatography-Mass Spectrometry (GCMS) with several stages. The preliminary test was carried out using the marquis reagent which changed the color of the sample to orange if positive for methamphetamine, then continued with TLC (Thin Layer Chromatography) analysis and obtained the Rf value close to the comparative Rf value, which means that maggot positively contains methamphetamine. Maggot was extracted by maceration and sonication methods using methanol:chloroform 1:3 solvent. Finally, a confirmatory test was carried out using a GCMS and it was found that methamphetamine had a retention time of 3.554 minutes and a peak of 58.1. The results are matched with NIST (National Institute of Standards and Technology) library data. It can be concluded that the use of maggot in analyzing methamphetamine using GCMS can be realized properly

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

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.

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

Use of milling equipment goat filth as fertilizer which mixed with dolamits in the village persadanta Scub-District Barusjahe Districts Karo Br Sembiring, Helmina; Ginting, Junedi
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

This community service aims to increase insight into the use of goat manure as fertilizer mixed with dolomite with very minimal expenditure of money using equipment provided by the USU Community Service Team in 2019 which was carried out in Persadanta Village, Barusjahe District, Karo District. The specific target of this service is to increase the productivity of agricultural products related to the use of fertilizers and be able to sell them to other communities, so as to increase community income for the achievement of a prosperous community, especially farmer groups in the village. So far, the people directly use goat manure as fertilizer for their plants. This is very detrimental to the community because the process is long to be able to become fertilizer and reduced nutrient elements that are poured into plants openly. Besides the use of dolomite mixed with goat manure is very good because dolomite is very much and easily obtained in Tanah Karo. Therefore, it is necessary to give insight and knowledge to the community, especially the Rumah Rih Hamlet Village Group Persadanta Village about the use of goat manure mixed with dolomite. So that people who have been buying fertilizer at a high price can manage it themselves by using the goat manure grinding equipment with the method to be implemented, namely counseling, training, direct practice and work evaluation.

Training in the Manufacture of Softener Fragrance Aroma Therapy in Tembung Village, District Percut Sei Tuan Marpongahtun; Andriayani; Pratama, Agung; br Sembiring, Helmina; Prayugo, Aniza Salviana; Daulay, Amru
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 8 No. 1 (2023): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v8i1.10326

Tembung Village, Percut Sei Tuan District, Deli Serdang Regency, North Sumatra Province, is a densely populated area. There are more than 200 laundry businesses. The potential for laundry business actors to produce softener and aromatherapy fabric softener has been hit very hard. However, the villagers, especially laundry business actors, do not know how to make these products. Making aromatherapy softeners independent will provide added value to the laundry business actors and villagers regarding economic costs and the transfer of knowledge of technology (science and technology commercialization). Therefore, the University of North Sumatra community service team wants to commercialize science and technology in making aroma softening therapy. The method used in this activity is the selection of partner locations, training, monitoring, and evaluation. The results of the questionnaire gave a value of 95% Participants were interested in training to produce aromatherapy softeners independently and took the initiative to make the results of this training a new opportunity.

Isolation and Identification of Flavonoids from Mundu Plant Leaves (Garcinia Dulcis (Roxb.) Kurz) Hutagalung, Natalia; Sembiring, Helmina Br.
Journal of Chemical Natural Resources Vol. 4 No. 2 (2022): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jcnar.v4i2.11971

Isolation and identification of the flavonoid compounds found in the leaves of the mundu plant (Garcinia dulcis (Roxb.) Kurz) have been carried out. The leaves of the mundu plant were extracted by maceration with methanol solvent. The concentrated methanol extract was added to distilled water and then filtered. Aquadest filtrate partitioned with ethyl acetate. Concentrated ethyl acetate extract was dissolved with methanol and partitioned with n-hexane solvent. The concentrated methanol extract was analyzed by thin layer chromatography and separated by column chromatography with chloroform as eluent: methanol (90:10) v/v ; (80;20) v/v ; (70:30) v/v ; (60:40) v/v. The compounds obtained were purified by preparative thin layer chromatography, producing a yellow amorphous solid of 8.4 mg with a value of Rf = 0.35 using chloroform: ethyl acetate (40:60) v/v as the eluent. The compounds obtained were analyzed using UV-Visible Spectrophotometer, Infrared Spectrophotometer (FT-IR), and Proton Nuclear Magnetic Resonance Spectrophotometer ( 1H-NMR). Based on the analysis and interpretation of spectroscopic data, it is suspected that the isolated compounds obtained are flavonoid compounds, namely the biflavonoid group.

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