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All Journal Aceh Journal of Animal Science Pro-Life JURNAL IQRA´ BIOEDUSAINS: Jurnal Pendidikan Biologi dan Sains Nazhruna: Jurnal Pendidikan Islam EDUKATIF : JURNAL ILMU PENDIDIKAN Jurnal Pembelajaran dan Biologi Nukleus Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences International Journal Of Science, Technology & Management (IJSTM) Bioscientist : Jurnal Ilmiah Biologi International Journal of Educational Research and Social Sciences (IJERSC) International Journal of Science and Environment Jurnal Pendidikan Islam
Arman Harahap
Universitas Labuhanbatu, Sumatera Utara, Indonesia
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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The Density of Coliform Bacteria Indicators of Pollution in the River Right Labuhanbatu Selatan Yatini, Yatini; Harahap, Arman
Budapest International Research and Critics Institute (BIRCI-Journal): Humanities and Social Sciences Vol 4, No 1 (2021): Budapest International Research and Critics Institute February
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birci.v4i1.1744

Abstract

Coliform bacteria is a one of a kind negative bacteria that is commonly found marine waters, the presence of coliform bacteria can be an indicator of biology that is important to know the environmental conditions. This study aims to determine the environmental conditions based on biological indicators in the form of an abundance of coliform bacteria in the waters of the River right District Labuhanbatu Selatan. The main ingredient in this study is the River right and sediment. The results of the analysis showed the density of coliform bacteria in the study site ranged from 500-700 colonies/ml for the sample waters and 27-120 MPN/g for sediment samples. The results obtained are still below the quality standard so that the river right in good condition biologically. The presence of coliform bacteria in the river can affect human and biota. So it needs to be considered in the efforts of the management of the coastal environment, particularly in efforts to maintain the sustainability of fisheries resources
Endophytic Bacteria and Fungi from Indonesian Medicinal Plants with Antibacterial, Pathogenic Antifungal and Extracellular Enzymes Activities: A Review Jendri Mamangkey; Lucas William Mendes; Arman Harahap; Dana Briggs; Cengiz Kayacilar
International Journal of Science, Technology & Management Vol. 3 No. 1 (2022): January 2022
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v3i1.428

Abstract

The habitat of endophytic bacteria in plant tissues making it automatically used by plants to protect themselves against pathogenic bacteria. Endophytic bacteria have been applied in various fields, including agriculture, pharmacy, medicine, and biotechnology. This review was carried out to summarize recent studies focusing on the diversity of endophytic bacteria derived from traditional medicinal plants which have antibacterial activity and extracellular enzymes. This article was prepared and written by referring to literature studies collected from books and online journal publication. The literature review of endophytic bacteria focused on Vernonia anthelmintic, Saurauia scaberrinae, and Ki rinyuh (Chromolaena odorata) plants. The results revealed that endophytic bacteria obtained from Vernonia anthelmintic plant is from Micrococcus, Bacillus, Pseudomonas, Stenotrophomonas, and Pantoea genus which possess the same biological properties as the host plant, producing antibacterial activity. Saurauia scaberrinae plant successfully isolated endophyte fungus Phoma sp. which produces phomodione (4) and cercosporamide. Phomodione (4) exhibit inhibitory activity against S. aureus, P. ultimum, S. sclerotiorum and R. solani. Cercosporamide exhibits inhibitory activity against S. aureus. Endophytic bacteria were also isolated from Ki rinyuh (Chromolaena odorata), including BECB3, BECB 4, BECA 8, BECA 5, BECA 1, and BECA 10 isolates which have extracellular enzyme activities such as β-amylase, α-amylase, cellulase, chitinase, and protease. Understanding endophytic bacteria in medicinal plants can help researchers apply them effectively.
The Diversity Of Macrozoobenthos River Aek Buru District Labuhan Batu Utara Arman Harahap
International Journal of Science, Technology & Management Vol. 3 No. 1 (2022): January 2022
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v3i1.456

Abstract

Benthos are organisms that live in the bottom of the waters, either animal or plant, living on the surface and in the bottom of the waters. This study aims to determine the diversity of Macrozoobenthos in the River Aek Hurry. The study began in November 2021 to January 2021. Sampling of macrozoobenthos done using a Surber net. based on differences in the substrate at the base of the river. Macrozoobenthos found in the Aek Buru consists of two Phyla, namely the Arthropods and Mollusks. Phylum Arthropoda are found is of the class of Insects belonging to the genus Hydropsyche, Polycentropus, psephenus, Dryops, Anthopotamu, Acroneuria and Triops. The phylum of Mollusks that are found are from a class of Bilvavia included in the Genus Corbicula and of the class of Gastropods of the Genera Melanoides and Melanatria. The abundance of macrozoobenthos of the highest on each of the stations is Polycentropus (66,67 ind/L) and Potadoma (266,67 ind/L). The abundance of macrozoobenthos of the highest found is Melanatria by 622,2 ind/L. Based on the value of the Index of Diversity (H) (0,367 – 0,602) the index of dominance (C) (0,132 – 0,386) and the evenness (E) (0,367 – 0,602) River Aek Buru in the category good condition with high species diversity. Physical and chemical factors of the water body capable of supporting life macrozoobenthos.
PERBEDAAN HASIL BELAJAR SISWA YANG DIAJAR DENGAN MENGGUNAKAN METODE DISKUSI DENGAN PENERAPAN PREDICTION GUIDE (TEBAK PELAJARAN) DAN TANPA PENERAPAN PREDICTION GUIDE PADA MATERI ABIOTIK LINGKUNGAN DI KELAS X SMS SWASTA KARYA TANI Arman Harahap
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 1, No 1 (2015): Jurnal Pembelajaran Dan Biologi Nukleus Februari 2015
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v1i1.1232

Abstract

Penelitian ini bertujuan untuk mengetahui perbedaan hasil belajar siswa yang dibelajarkan dengan menggunakan metode pembelajaran diskusi dengan penerapan predistion guide dan tapa penerapan prediction guide pada materi abiotil lingkungan di kelas X SMA Swasta Karya Tani. Hasil penelitian diperoleh rata-rata hasil belajar biologi siswa pada materi pokok sistem pernapasan manusia yang dibelajarkan menggunakan metode pembelajaran diskusi (kelas eksperimen) yaitu kelas XA rata-rata sebesar 78,47 dengan standar deviasi 8,06. Sedangkan siswa yang dibelajarkan dengan model pembelajaran konvensional (kelas kontrol) yaitu XB rata-rata sebesar 70,11 dengan standar deviasi 8,22. Hasil pengujian hipotesis diperoleh thitung > ttabel yaitu 7,695 > 2,00 sekaligus menyatakan terima Ha yang berarti terdapat pengaruh hasil belajar biologi siswa yang dibelajarkan dengan menggunakan metode pembelajaran diskusi. Dengan demikian model pembelajaran diskusi berpengaruh terhadap hasil belajar siswa kelas X SMA Swasta Karya Tani.
Distribution and length-weight relationships of Hilsa shad Tenualosa ilisha in the Bilah River, Labuhanbatu Regency, North Sumatera Province, Indonesia Rusdi Machrizal; Khairul Khairul; Juliana Nasution; Rivo H. Dimenta; Arman Harahap
Aceh Journal of Animal Science Vol 4, No 1: July 2019
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (12.993 KB) | DOI: 10.13170/ajas.4.1.13799

Abstract

Hilsa shad Tenualosa ilishais of the indigenous fish species and the icon of the Labuhanbatu Regency, Indonesia. Presently, a very limited study was done in this species. Hence, the purpose of this study was to analyse the distribution and growth patterns based on the length-weight relationship of Hilsa shad T. ilishaon Bilah River, Labuhanbatu District, Sumatera Utara Province, Indonesia. Sampling was carried out for 3 months starting in February-April 2019 with the exploration method. Determination of sampling locations based on information from local fishermen. Analysis of distribution data used the Morisita index and growth patterns used the Linear Allometric Model (LAM). The analysis results of Hilsa shad distribution indicated that these fish were distributed in groups/clustered with the Morisita index value of 2.211-2.314. The growth pattern of the fish was negative allometric with a value of b3. Correlation analysis showed that DO was closely related to distribution (r2=0.661), meanwhile, light penetration was closely related to growth patterns (r2=0.914). It is concluded that the distribution of Hilsa shad fish in the Bilah River was in groups or clustered, with a negative allometric growth pattern. Keywords: Hilsa Shad, distribution, growth pattern, Tenualosa ilisha
How Universities Entrust Digital Literacy to Improve Student Learning Outcomes During the COVID-19 Disruption Abd. Basir; Kamaliah Kamaliah; Arman Harahap; Ahmad Fauzi; Budi Karyanto
Jurnal Iqra' : Kajian Ilmu Pendidikan Vol 6 No 1 (2021): Jurnal Iqra' : Kajian Ilmu Pendidikan
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/ji.v6i1.1146

Abstract

Since the policy of sending students home to study as a result of responding to the dangers of the pandemic, universities around the world have increasingly trusted distance learning solutions. The solution was to rely on digital literacy to continue and improve student learning outcomes during the COVID-19 disruption. For this reason, the researchers have proven it through analytical efforts and in-depth studies in several international publications. In short, the researchers examined each piece of evidence with a phenomenological approach to get answers to research questions that are among other things, involve a data coding system, critical evaluation, and drawing of valid and reliable final results. The data discussion concludes that world universities believe that digital technology that was increasingly trending can become a learning innovation even though the world will continue to hit global education. Hence, the researchers hope that these findings should support other studies in the future. Keywords: Digital Literacy, Learning Outcomes, Entrust Digital Literacy
Hubungan Motivasi Berprestasi, Minat dan Perhatian Orang Tua Terhadap Kemandirian Siswa Hasmi Syahputra Harahap; Nurlina Ariani Hrp; Intan Bayati Nasution; Amin Harahap; Aziddin Harahap; Arman Harahap
EDUKATIF : JURNAL ILMU PENDIDIKAN Vol 3, No 4 (2021)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/edukatif.v3i4.463

Abstract

Penelitian ini bertujuan untuk mengetahui hubungan antara motivasi berprestasi, minat, perhatian orang tua terhadap terhadap kemandirian siswa. Penelitian ini dilakukan di SMA Sekecamatan Medan Kota. Metode penelitian yang digunakan adalah deskriptif korelasional dengan sampel penelitian sebanyak 275 siswa yang ditentukan secara purposive sampling (sampel bertujuan) yaitu SMA Negeri 5 sebanyak 138 siswa, SMA Negeri 6 sebanyak 65 siswa, dan SMA Negeri 10 sebanyak 72 siswa. Instrumen penelitian menggunakan angket motivasi berprestasi dengan jumlah 30 soal, angket minat dengan jumlah 20 soal, angket perhatian orang tua dengan jumlah 25 soal, dan angket kemandirian siswa dengan jumlah 40 soal. Teknik analisis yang digunakan adalah korelasi dengan bantuan program SPSS 21.0 for windows. Hasil penelitian menunjukkan bahwa terdapat hubungan yang signifikan antara: (1) Motivasi berprestasi terhadap kemandirian siswa (r=0,326 ; p=0,000); (2) Minat terhadap kemandirian siswa (r=0,293 ; p=0,000); (3) Perhatian orang tua terhadap kemandirian siswa (r=0,419 ; p=0,000). Tindak lanjut dari hasil penelitian ini diharapkan kepada guru dan orang tua untuk dapat memberi semangat kepada anaknya dalam upaya meningkatkan kemandirian dalam belajar baik di sekolah maupun di rumah
The Influence Of Learning Model Application of Discovery To The Results of The Study of Biology Arman Harahap; Mulya Rafika; Paramadi Harahap
International Journal of Educational Research & Social Sciences Vol. 1 No. 1 (2020): December 2020
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijersc.v1i1.8

Abstract

This research was conducted in the upper secondary school Panai Middle years learning 2018/2019. This study aims to determine the influence of learning model application of Discovery to student learning outcomes on the material the human excretory system in class XI Science. This type of research is quasi-experimental. Population, all students of class XI Science high school Panai Tenga amounted to 32 people. The sampling technique is total sampling, where the entire population in the study sample. The instruments used are test, observation sheet and questionnaire. Data were analyzed using descriptive statistics, test prerequisites and the test of hypothesis with the help of SPSS software version 22.From the results of the hypothesis test, t-test paired samples (Paired Sample t-test), obtained the value of tcount of 5, 422 and ttable with α = 0.05, df = 15, the obtained values ttable amounted to 2,131. The value of tcount > ttable or 5,422 > 2,131 can be concluded that H0 is rejected and Ha accepted. This means that there is significant influence of learning model application of Discovery to student learning outcomes in class XI Science high school Panai Middle years learning 2018/2019.
Study of Macrozoobenthic Diversity in the New River Flow of Pinang City, Labuhan Batu Selatan Leli Febriani; Arman Harahap
Budapest International Research and Critics Institute (BIRCI-Journal): Humanities and Social Sciences Vol 4, No 1 (2021): Budapest International Research and Critics Institute February
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birci.v4i1.1750

Abstract

Benthos is an organism that lives on the bottom of the waters, both in the form of animals and plants, living on the surface and on the bottom of the waters. This study aims to determine the diversity of macrozoobenthic species in the Barumun River, Pinang City. The research starts from December 2020 to February 2021. Macrozoobenthic sampling using Surber net and Ekman Grab based on substrate differences in the riverbed. Macrozoobenthos found in the Barumun River in Pinang City consists of two phyla, namely Arthropoda and Molluscs. The phylum Arthropods found are from the class of insects belonging to the genera Hydropsyche, Polycentropus, psephenus, Dryops, Anthopotamu, Acroneuria and Triops. The phylum Molluscs found were from the Bilvavia class which belonged to the Corbicula genus and from the Gastropod class of the Genera Melanoides and Melanatria. The highest macrozoobenthic abudance at each station was Polycentropus (65,67 ind L) and Potadoma (265,67 ind L). The highest macrozoobenthic abudance found was Melanatria at (633,67 ind L) based on the vulnerability index value (H) (2,087 – 1,003) dominance index (C) (0133 -0,389) and evenness index (E) (0,365-0,603) Barumun River Kota Pinang is included in the good condition category with high species diversity. The physical and chemical factors of the waters are able to support macrozoobenthic life.
Analysis of the Quality of the River Kundur in the Review of the Physical-Chemical Kiki Maini Hasibuan; Arman Harahap
Budapest International Research and Critics Institute (BIRCI-Journal): Humanities and Social Sciences Vol 4, No 1 (2021): Budapest International Research and Critics Institute February
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birci.v4i1.1731

Abstract

The purpose of this study is to analyze the water quality of the river and the status of water quality of watersheds Kundur Kabupaten Labuhanbatu. Sampling was done at 3 monitoring points along the flow of the river Kundur Kabupaten Labuhanbatu. The determination of the sampling points in the field using the purposive sampling method, with the determination of the sampling points based on the differences in the characteristics found in the study area.Some of the parameters measured were temperature, conductivity, COD, BOD, and oil/ fat are then compared with the criteria of the Raw water Quality of the river class II according to PP R. I. No. 82 Year 2001.On Water Quality Management.Based on the results of the analysis of the obtained results that in the area of monitoring point 1, is the most polluted areas.This is because, in this area there is the activity of a diverse community.Household produces waste that comes from the activity of the bathroom, toilet, kitchen, washing clothes and washing of household appliances.
Co-Authors Abd. Basir Abd. Basir Abdul Wahab Syakhrani Ahmad Fauzi Ahmad Hidayat Sutawidjaya Akhmad Halim Ilmanto Amin Harahap Andreas Simorangkir Astuti Yuni Nursasi Aziddin Harahap Bitondo Dieudonne Cengiz Kayacilar Dana Briggs Daru Asih Desi Nursaini Eli Suryani Elly Nurachmah Eni Fariyatul Fahyuni Erlina Puspitaloka Mahadewi Fahrur Rozy Siregar Gunawan Widjaja Harahap, P Hasmi Syahputra Harahap Ika Rosenta Purba Intan Bayati Nasution Isnaini Fitria Jendri Mamangkey Juliana Nasution Kamaliah Kamaliah Karyanto, Budi Khairul Khairul Kiki Maini Hasibuan Leli Febriani Lidia Rahayu Lina Rosanti Lucas William Mendes Mariana Simangunsong Masdiana Sinambela Mulya Rafika Ngadino Surip Nur Hasanah Pohan Nurhasanah Ritonga Nurlina Ariani Hrp Nurlina Nurlina Nurma Ani Paramadi Harahap Rani Lasari Ria Resti Fauzi Pane Rivo H. Dimenta Roma Tao Toba MR Rusdi Machrizal Sari Mawaddah Harahap Simangunsong Simangunsong Sintia Ananta Sri Kedaton Tris Eryando WINARTI WINARTI Wirawan, Vani Yatini, Yatini