Article Per Year (5 Year)
p-Index From 2020 - 2025
5.362
P-Index
This Author published in this journals
All Journal Jurnal Entropi Sainstek AKADEMIKA Jurnal Penelitian Sains JURNAL PENDIDIKAN GLASSER Jurnal Pendidikan Kimia (JPKim) Indonesian Journal of Chemistry Indonesian Journal of Pure and Applied Chemistry Chemistry Indonesian Journal of Chemical Research Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Jambura FIsh Processing Journal Jambura Journal of Educational Chemistry Jambura Journal of Chemistry Jurnal Riset Pendidikan Kimia (JRPK) Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Stannum : Jurnal Sains dan Terapan Kimia SPIN: Jurnal Kimia & Pendidikan Kimia CHEDS: Journal of Chemistry, Education, and Science Pentagon: Jurnal Matematika dan Ilmu Pengetahuan Alam Damhil: Jurnal Pengabdian kepada Masyarakat Journal of Community Services on Multidisciplinary Sciences Jurnal Pendidikan Kimia, Fisika dan Biologi
Nurhayati Bialangi
Universitas Negeri Gorontalo
Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Other

Published : 66 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 66 Documents
Search

 1   2   3   4   5 
MENINGKATKAN AKTIVITAS SISWA KELAS XI MA AL-KHAIRAAT GORONTALO MELALUI MODEL PEMBELAJARAN KOOPERATIF TIPE BERKIRIM SALAM DAN SOAL PADA MATERI LARUTAN PENYANGGA DAN HIDROLISIS GARAM (Suatu Penelitian di Kelas XI IPA MA Al-Khairaat Gorontalo TP 2008/2009) Sari, Eka Puspita; Bialangi, Nurhayati; Ischak, Netty
Jurnal Entropi Vol 5, No 1, 2009
Publisher : Jurnal Entropi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (42.319 KB)

Abstract

The purpose of class action research is to increase the students activity on buffer and salt hydrolysis by using cooperative learning type sending greeting and question. The students of class XI IPA MA Al-Khairaat Gorontalo city as the subject of the research fourteen (14) people, consist five for boys and nine for girls. T6he successful qualification of this research are : (1) minimum 75 % from all the teacher activity and students that observed achieve the target, (2) minimum 80% of students thet gooten action get mark 6,5 upper with the understanding of material average 65%. Students activity in learning process is influenced by the result of students learning. Presentate average of students activity in cycle I : 27,88% get excellent, 51,07% get good, 17,86% get intermediate, 3,57% get bed. The result of students learning 71,43% with the understanding of material 64,8%. Cycle II : presentate average of students activity 68,57% get excellent, 27,14% get good, 4.,29% get intermediate, the result of students learning 85,72% and the understanding of material 80,25% Base on the data of research result, then the hypotesis of action tested the truth, namely :by using cooperative learning model type sending greeting and question in buffer and salt hydrolysis, then the students learning activity increase
PENDEKATAN SETS (SCIENCE, ENVIRONMENT, TECHNOLOGY, AND SOCIETY) DALAM PEMBELAJARAN REDOKS PADA SISWA KELAS X MADRASAH ALIYAH NEGERI LIMBOTO Umar, Lisdawati N.; Isa, Ishak; Bialangi, Nurhayati
Jurnal Entropi Vol 5, No 1, 2009
Publisher : Jurnal Entropi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (41.98 KB)

Abstract

The research is experiment research that aimed to prove the different of students achievement that was taught by using SETS approach and by conventional significantly at MAN Limbotos students. The population were students of XA class, XB class and XC class of MAN Limboto in 2008/2009 academics years that consisted of 86 students. The sample was students of XA class and XC class that consisted of 50 students. The sample was taken by using Cluster Random Sampling technique. The instruments in collecting the data was essay test that validity and reliability had tested before. Method of data analyses were normality test, homogenity test and hypothesis test. At hypothesis test, it got tcount = 2.322, while ttable = 1,711. The result showed that students achievement that was taught by using SETS approach is better than students achievement that was taught by using conventional in Oxidation and Reduction Reaction lesson.
IDENTIFIKASI ZAT PEWARNA PADA SAOS TOMAT DENGAN METODE KROMATOGRAFI LAPIS TIPIS Bialangi, Nurhayati
Jurnal Entropi Vol 1, No 2, 2006
Publisher : Jurnal Entropi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (44.172 KB)

Abstract

Telah dilakukan isolasi dan identifikasi zat warna dari saos tomat. Pada tahap isolasi menghasilkan isolat berbentuk serbuk berwarna merah. Uji kemurnian isolat dilakukan dengan metode kromatografi lapis tipis dengan fasa gerak yang berbeda yaitu: Isopropanol : Air : Asam Formiat (40:10: 2); Metanol : Aseton (60 : 40); Isopropanol : Amonia : Air (10 : 1 : 1); Isopropanol : Amonia (4 : 1); Metanol : Air (4 : 1); dan Metanol : Aseton (3 : 2), menghasilkan bercak tunggal dengan nilai Rf berturut-turut : 0,9 ; 0,9; 0,9; 0,9; 0,7; dan 0,9. Identifikasi senyawa isolat dilakukan dengan analisis berdasarkan teknik kromatografi lapis tipis dengan membandingkan nilai Rf dari isolat dengan nilai Rf dari zat warna merah yang dibeli di pasaran Gorontalo. Hasil analisis data kromatografi lapis tipis senyawa isolat diduga sebagai zat warna yang identik dengan zat warna sintetik certified color jenis Ponceau 4 R dengan nilai Rf 0,9. Terhadap isolat dilakukan pula uji kelarutan dan reaksinya terhadap pereaksi-pereaksi tertentu, dan menunjukkan hasil sebagai berikut:mudah larut dalam air, dan memberikan larutan berwarna merah jingga, larut dalam gliserol dan glikol, mudah larut dalam alkohol 95%. Warnanya sedikit luntur oleh asam asetat 10%, dengan larutan NaOH 30 % akan menghasilkan larutan berwarna kekuningan, dan isolat ini dapat diendapkan dengan tawas 5%
Penerapan Model Pembelajaran Bakulikan untuk Meningkatkan Hasil Belajar pada Pokok Bahasan Koloid Siswa Kelas XI IPA-3 SMA Negeri 3 Gorontalo. Soleman, Sumarlin; Bialangi, Nurhayati; Sihaloho, Mangara
Jurnal Entropi VOL 08, NO 01, 2013
Publisher : Jurnal Entropi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (638.873 KB)

Abstract

Penelitian ini adalah suatu Penelitian Tindakan Kelas dengan subjek penelitian adalah siswa kelas XI IPA-3 SMA Negeri 3 Gorontalo. Penelitian ini bertujuan untuk meningkatkan pemahaman pada pokok Bahasan Koloid dengan menggunakan Model Pembelajaran Bakulikan pada Siswa Kelas XI IPA-3 SMA Negeri 3 Gorontalo, Tahun Ajaran 2010-2011 yang berjumlah 37 orang. Penelitian ini dilaksanakan dalam dua siklus dengan mengikut sertakan seorang guru pengamat. Kriteria keberhasilan penelitian ini adalah 85% siswa memperoleh nilai 7,5 keatas. Hasil penelitian menunjukan bahwa penggunaan Model Pembelajaran Bakulikan ini dapat meningkatkan pemahaman siswa yang dilaksanakan dengan meninngkatnya hasil belajar siswa. Pada sisklus I hasil belajar siswa sebesr 78,38% dan meningkat pada siklus II menjadi 91,89%. Dan hasil penelitian dapat disimpulkan bahwa penggunaan Model Pembelajaran Bakulikan pada materi koloid dapat meningkatkan pemahaman siswa dengan ditunjukan dengan meningkatnya hasil belajar Siswa Kelas XI IPA-3 SMA Negeri 3 Gorontalo.
ISOLASI DAN KARAKTERISASI KITOSAN DARI KULIT UDANG WINDU (Peneaus monodon) YANG DIBUDIDAYAKAN DI GORONTALO Usman, Anggraini Dj; Lukum, Astin; Bialangi, Nurhayati
Jurnal Entropi Vol 5, No 1, 2009
Publisher : Jurnal Entropi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (41.53 KB)

Abstract

This research is a laboratory experiment, which intends to isolate and characterize chitosan of windu shrimps skin, which is cultivated in Gorontalo by using Fourier Transform Infra Red Spectrophotometer. The result of water analysis and degree, ash degree, and the degree of deasetilation, which were found were in accordance to standard parameter of chitosan which is required, that are 8%, 1,5% and 80,01%. The test of chitosan solubility characteristic was apparently in accordance with standard parameter of chitosan quality that is not soluble in water, concentrated NH3, Na2SO4 2%, slightly soluble in concentrated HCl, concentrated HNO3 and soluble in CH3COOH 1%.
NALISIS PROTEIN IKAN NIKE ASAL GORONTALO Kadir, Nurlaela Abd.; Bialangi, Nurhayati; Ischak, Netty
Jurnal Entropi Vol 2, No 2, 2007
Publisher : Jurnal Entropi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (38.979 KB)

Abstract

Penelitian ini merupakan suatu eksperimen laboratorium yang bertujuan untuk menganalisis protein yang terdapat dalam ikan Nike. Penetuan kadar protein yang dihitung adalah persen nitrogen total, kemudian dikalikan dengan faktor konversi, hingga didapat kadar protein kasar pada ikan Nike yang dianalisis. Penelitian ini dilanjutkan dengan melakukan identifikasi adanya asam amino melalui metode Kromatografi Kertas. Hasil penelitian menunjukkan perbedaan kadar protein pada ikan Nike dari hari pertama dan hari Terakhir kemunculannya. Kadar protein kasar pada ikan Nike hari pertama yaitu 2,7315 % sedangkan pada hari terakhir yaitu 4,083 %. Hasil identifikasi diduga di dalam ikan Nike terdapat asam-asam amino esensial yaitu Leusin, Isoleusin, Metionin dan Threonin.
ISOLASI DAN KARAKTERISASI SENYAWA ALKALOID DARI DAUN ALPUKAT (PERSEA AMERICANA MILL) Tengo, Nilda Apriyati; Bialangi, Nurhayati; Suleman, Nita
Sainstek VOL 07, NO 01, 2013
Publisher : Sainstek

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (265.762 KB)

Abstract

The aims of this study is to isolate and find the alkaloid compounds contained in the leaves of avocado (Persea americana Mill). The method used is the isolation of pure compounds to obtain isolates. 400 g of avocado leaves macerated with methanol solvent yield 53.41 gr of methanol extract. The results of column chromatography I yield 17 fractions, the fraction N12 is re-elected for column chromatography II. The results of chromatography N12 obtained isolate pure in fractions 7. This isolate is tested purity by using thin layer chromatography with eluent variations produce a single stain pattern, so it can proceed with the test isolate phytochemicals. The results of IR spectrophotometer data interpretation, isolate pure fractions 7 indicates the presence of alkaloid compounds having functional groups N-H (3311.55 cm-1), C-H aliphatic (2921.96 cm-1, 2850.59 cm-1), C=O (1735.81 cm-1, 1641.31 cm-1), C-N (1240.14 cm-1, 1130.21 cm-1), C-H Aromatic (910.34 cm-1, 846 cm-1), N-C=O (580.53 cm-1). The results of UV-Vis spectrophotometer from fractions 7 gives absorption wavelength of 238.5 nm indicating the occurrence of electron transition n * and n * which indicates the existence of C=O and N-H groups.
ISOLASI DAN KARAKTERISASI SENYAWA ALKALOID DARI BIJI TUMBUHAN SIRSAK (Annona muricata Linn) Idrus, Rifki Brahmono; Bialangi, Nurhayati; Alio, La
Sainstek VOL 07, NO 01, 2013
Publisher : Jurnal Sainstek

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (188.188 KB)

Abstract

Isolation and Characterization of Alkaloid Compounds from Plant Sirsak (Annona muricata Linn.) Seeds. Have done the isolation and characterization of the alkaloid content in seeds of Sirsak (A muricata Linn) plant. Isolation was performed with the maceration extraction by using methanol solvent. Condensed methanol extracts fractionated successively with n-hexane and ethyl acetate. Further separation process that is focused on condensed methanol extract using column chromatography, as used silica gel stationary phase and mobile phase was a mixture of n-hexane: ethyl acetate, and ethyl acetate: methanol with gradient have. Purity of the isolates obtained was tested using Thin Layer Chromatography. Isolates were further characterized using UV-Vis and Infrared. The results of spectroscopic analysis of UV-Vis and Infrared (IR) suggested that isolates is a class of alkaloid compound with Alkaloids-Indole type that have characteristics of functional groups N-H, aliphatic C-H, C-N, C=C aliphatic, C=O, =C-H aromatic and provide wavelength spectra max 282.5 nm and 237.5 nm.
PERTUMBUHAN BAKTERI STAPHYLOCOCCUS AUREUS PADA MEDIA YANG DIEKSPOS DENGAN INFUS DAUN SAMBILOTO (ANDROGRAPHIS PANICULATA) Retnowati, Yuliana; Bialangi, Nurhayati; Posangi, Nona Wingti
Sainstek Vol 6, No 2, 2011
Publisher : Sainstek

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7.363 KB)

Abstract

The aim of study was to determine the growth of Staphylococcus aureus on The Medium that Exposed with sambiloto leaf infusion. The study was done at microbiology laboratory, Biology Department, Gorontalo State University. The descriptive method was used, that describes of the effect of sambiloto leaf infusion to S. aureus growth, which refers to the specific growth rate and generation time in bitter leaf infusion concentration variation during the incubation period 72 hours. The results showed that the sambiloto leaf infusion have bacteriostatic effect on S. aureus growth with specific growth rates at concentrations (v/v) of 0%, 25%, 50% and 75% were 0.362, 0.260, 0.169 and 0.974 / h and each of generation time were 1.92, 2.66, 4.09 and 9.29 hours. Keywords: Growth, S. aureus, infusion sambiloto leaf, bacteriostatic effect.
SUATU FLAVONOID DARI TUMBUHAN MILLETTIA ICHTHYOCHTONA Bialangi, Nurhayati
Sainstek Vol 2, No 2, 2007
Publisher : Jurnal Sainstek

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

Abstract

Millettia, one of the main genus of Fabaceae, known to produce flavonoid compounds. Some isoflavones compounds such as jamaicin, were found from the leaves of M. ichthyochtona afforded. Compound Jamaicin was found for the from M. ferruginea. Struktur determination of these compounds was carried out based on physical and spectroscophic method (UV,IR, 1H-NMR, dan 13C-NMR).
Co-Authors Agus Malik Ibrahim Agus Malik Ibrahim Ahmad Fajar Muzakir Ahmad Kadir Kilo Ahmad Kadir Kilo Ahmad, Halid S. Akram La Kilo Anggraini Dj Usman Ari Widiantoro Ari Widiyantoro Arviani Arviani Astin Lukum Boima Ramses Situmeang Boima Situmeang Boima Situmeang Boima Situmeang Boima Situmeang Botutihe, Deasy N. Dian Susvira Diky Kurniawan Djalil, Jhodi Pratama Djalil, Moh. Rifaldi Dzulhijar Eka Puspita Sari Erga Kurniawati Erni Mohamad Fadilah Alawiya Paputungan Faradin, Faradin Fauziah, Eka Donna giu, fitri ani Hadji, Fitri Halalutu, Hamdan Haleda, Padria Hamdan Halalutu Haris Munandar Hendri Iyabu Hidayatullah, Ryan Holisha Widiyanto Holisha Widiyanto Ibrahim, Agus Malik Ibrahim, Agus Malik Ishak Isa Isna Lailatusholihah Jafar La Kilo Jinanti, Nazwa Julhim S Tangio Julhim S Tangio Julhim S. Tangio Juliandoz Julinton Sianturi Jumarni Kamarudin La Alio La Alio La Ode Aman Lailatussholihah, Isna Laliyo, Lukman Lintang Panji Setyoko Lintang Panji Setyoko Lintong, Kristin Lisdawati N. Umar Lukman A. R. Laliyo M Amrin Sunardi Mangara Sihaloho Mardjan Paputungan Marsya Divya Olii Masrid Pikoli Meli A. Rasid Moh Adam Mustapa Mohamad Adam Mustapa Muhammad Bagus Ramadhan Muhridja, Melisa Mulyadi, Agus Musa, Weni J.A Musa, Weny J.A. Mustafid, Afif Hidayatul Najmah, Najmah Nani Yulianti Netty Ino Ischak Ngabito, Putri Amalia Nilda Apriyati Tengo Ninik Triayu Susparini Nita Suleman Nona Wingti Posangi Nur Rafida Akub Nur Riska Apriana Nur, Dian Nurfadilah M. Kasim Nurkhaliq, Nurkhaliq Nurlaela Abd. Kadir Ode, Nur Mei Yulianty Olii, Marsya Divya Pakaya, Agustina H. Parulian, Boima Ramses Perry Zakaria R Tulie, Wina Zulviana Reski Rahmatia Idris Rifki Brahmono Idrus Risciana Yusuf Risnayanti R Juramang Rustam I. Husain Sahami, Ulin Saiman Saiman Samosir, Andeston Sumandoli Saronom Silaban Setiyandani, Kurnia Indah Situmeang, Boima Sri Revayana Kupang Sri Wijayanti Sriwijayanti Sriwijayanti Suleman Duengo Sumarlin Soleman Susparini, Ninik Triayu Susvira, Dian Thayban, Thayban Wenny J A Musa Weny J.A Musa Weny J.A Musa Weny JA Musa Weny Musa Widiyanto, Holisha Widy Susanti Abdulkadir Wiwin Rewini Kunusa Wiwiyani Wiwiyani Yayurulia Hadju Yuliana Retnowati Yuszda K Salimi Yuszda K. Salimi Yuzda K Salimi