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Dr.

Helmina Br. Sembiring

M.Si.
Helmina Br. Sembiring

Dr. Helmina Br. Sembiring, M.Si.

Employee ID Number

197602022000122002

National Lecturer Registration Number

0002027601

Study Program
Program Studi S3 Ilmu Kimia
Program Studi S1 Kimia
Program Studi S2 Kimia
Field Of Knowledge
Positions
Associate Professor
Research Media
Google Scholar Sinta Scopus
Contacts:
E-mail

helmina.sembiring@usu.ac.id, helmina02@yahoo.com

Office Address

USU Faculty of Mathematics and Natural Sciences

Curriculum Vitae file_download
Profile

Helmina Br. Sembiring Dr. S.Si., M.Si., born in Sukaramai on February 02, 1976, is a Chemistry lecturer at the Universitas Sumatera Utara. She completed her doctoral degree in Chemistry at USU in 2016.

Publications
Other Publications

National Publications

Antioxidants Activity of Face Toner from Ethyl Acetate Fraction of Okra Seeds

SOVIA LENNY , HELMINA BR SEMBIRING , FATMAWATI LUBIS

Isolation and Identification of Flavonoid Compound from the Rambutan Stem Bark (Nephelium lappaceum L.)

HELMINA BR SEMBIRING

Antioxidant Activity Assay of Eucalyptus pellita Leaf Extract

SOVIA LENNY , HELMINA BR SEMBIRING

Training in the Manufacture of Softener Fragrance Aroma Therapy in Tembung Village, District Percut Sei Tuan

AMRU DAULAY , MARPONGAHTUN , AGUNG PRATAMA , ANDRIAYANI , HELMINA BR SEMBIRING , ANIZA SALVIANA PRAYUGO

AKTIVITAS ANTIOKSIDAN SENYAWA FLAVONOIDA DARI DAUN BENALU KAKAO (Dendrophthoe pentandra (L.) Miq.)

HELMINA BR SEMBIRING , SOVIA LENNY

International Publications

Phytochemical Insights into Plantation Timber: Cudracusisoflavone and Bioactivities of Eucalyptus pellita Leaf Extracts from North Sumatran Clones

SOVIA LENNY , HELMINA BR SEMBIRING , MURNI SURYANI LUMBANTORUAN

Microwave-assisted enzymatic production of cosmetic ester 2-ethylhexyl oleate and myristate

EKO K SITEPU , HELMINA BR SEMBIRING , JULIATI BR TARIGAN , ELLA PARAWITA , DEA HAFIZAH , NOVIA RAMADHANI , MAYA RANI SHAHIRA SIREGAR , Emilia Abdulmalek , Rodiah N. Sari , Firman Sebayang

Fatty acid methyl ester (FAME) production from sludge solid waste as K2O/ SiO2 catalyst

HELMINA BR SEMBIRING , SABARMIN PERANGINANGIN

Qualitative Determination of Secondary Metabolites and Antioxidant Activity of Betel (Piper betle L.)

SOVIA LENNY , HELMINA BR SEMBIRING

GLYCOSYLATED FLAVONOID COMPOUND FROM COCOA PARASITE LEAVES (Dendrophthoe pentandra (L.) Mig.)

HELMINA BR SEMBIRING , LAMEK MARPAUNG , MOHAMMAD BASYUNI , Prof. Dr. Partomuan Simanjuntak, M.Sc.

Researches
Other Researches
Pembuatan Bahan Kosmetik 2-Etilheksil Asam Lemak Melalui Reaksi Esterifikasi Enzimatis Menggunakan Radiasi Mikrowave

HELMINA BR SEMBIRING , EKO K SITEPU , Prof. Dr. Emilia Binti Abd. Malik

PENGARUH KOMPOSISI DARI POLIETILEN OKSIDA-POLIPIROL (PEO-PPy) NANOFIBER PADA UJI ANTIBAKTERI TERHADAP E.coli DAN BIOKOMPATIBILITAS SEL FIBROBLAS L929

HELMINA BR SEMBIRING , SABARMIN PERANGINANGIN

KARAKTERISASI SENYAWA AKTIF DARI DAUN SIRIH (Piper betle) SEBAGAI ANTIOKSIDAN DAN TOKSISITASNYA

HELMINA BR SEMBIRING , SOVIA LENNY

Isolasi dan Penentuan Struktur Senyawa Flavonoida Daun Benalu Kakao (Dendrophtoe petandra (L) Miq Serta Uji Aktivitas Antioksidan dan Sitotoksisitas

HELMINA BR SEMBIRING , SOVIA LENNY

Community Services
Other Services

Pelatihan pembuatan sabun batangan dan lilin berbasis minyak jelantah bagi Moria GBKP Rayon Kabanjahe Sekitar di gedung serbaguna GBKP Simpang Enam Kabanjahe Kabupaten Karo

GBKP Simpang Enam Kabanjahe. JULIATI BR TARIGAN , JUNEDI GINTING , HELMINA BR SEMBIRING , SABARMIN PERANGINANGIN , EKO K SITEPU . 2023

Pelatihan pembuatan sabun batangan dan lilin berbasis minyak jelantah bagi Moria GBKP Rayon Medan Sekitar di GBKP Sunggal Asam Kumbang Kecamatan Medan Selayang Kotamadya Medan

GBKP Sunggal Asam Kumbang, Medan. JULIATI BR TARIGAN , HELMINA BR SEMBIRING , LINA TARIGAN , SABARMIN PERANGINANGIN , EKO K SITEPU . 2023

Pelatihan Pembuatan Pelembut dan Pewangi Pakaian Aroma Terapi Ramah Lingkungan untuk Usaha Laundry Rumahan di Desa Tembung Kecamatan Percut Sei Tuan

Desa Tembung Kecamatan Percut Sei Tuan. AGUNG PRATAMA , ANDRIAYANI , HELMINA BR SEMBIRING , MARPONGAHTUN , PUTRI , NITA UTAMI , RUHAMA RUMAISHA LUBIS , ANIZA SALVIANA PRAYUGO , ALDA MAHIRA . 2022

PENGGUNAAN PERALATAN PENGGILINGAN KOTORAN KAMBING SEBAGAI PUPUK YANG DICAMPUR DENGAN DOLOMIT DI DESA PERSADANTA KECAMATAN BARUSJAHE KABUPATEN KARO

. JUNEDI GINTING , HELMINA BR SEMBIRING . 2019

Intellectual Property Rights
Other Intellectual Property Rights
Courses Taught

Year Of Study

Semester

No data available