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All Journal Jambura Journal of Educational Chemistry Jambura Journal of Chemistry Acta Chimica Asiana Hydrogen: Jurnal Kependidikan Kimia
Deasy Natalia Botutihe
Universitas Negeri Gorontalo
Chemistry Education Other

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Isolasi dan Karakterisasi Senyawa Metabolit Sekunder Dari Ekstrak Metanol Biji Kecubung Opir rumape; Riskah Fitriani Adam; Deasy Natalia Botutihe; La Alio; Jafar La Kilo; Mardjan Paputungan
Jambura Journal of Chemistry Vol 3, No 2 (2021): August
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jambchem.v3i2.10577

Abstract

Penelitian ini bertujuan mengisolasi dan mengkarakterisasi senyawa metabolit sekunder yang terkandung pada biji kecubung. Isolasi dilakukan dengan tehnik ekstraksi secara maserasi menggunakan pelarut metanol. Selanjutnya proses pemisahan untuk ekstrak kental metanol dilakukan menggunakan kromatografi kolom dengan campuran n-heksan: MTC: aseton (7:1,5:1,5). Uji fitokimia dari isolat murni memberikan hasil yang positif terhadap senyawa terpenoid. Hasil penelitian menunjukkan bahwa senyawa yang diperoleh dari biji kecubung berupa kristal berwarna putih. Uji KLT dua dimensi dengan dua perbandingan campuran eluen yaitu n-heksan : etil asetat (7:3) sebagai E1 dengan harga Rf 0,162 dan kloroform : metanol (9,5:0,5) sebagai E2 dengan harga Rf 0,55 menghasilkan noda tunggal. Analisis spektrofotometer Uv-Vis dengan serapan panjang gelombang 281,00 nm dan 284,00 nm diakibatkan oleh adanya transisi n – π* yang disebabkan adanya ikatan kromofor C=O. Hasil ini didukung oleh data spektrum IR menghasilkan gugus-gugus fungsi ulur O-H (3440.77 cm-1), ulur C-H gugus alkil (2935.46 cm-1), ulur C-H alifatik (2858.31 cm-1), ulur C=O (1739.67 cm-1), ulur C=C aromatik (1620.09 dan 1569.95 cm-1), tekuk C-H (1456.16 cm-1), tekuk C-H (1415.65 dan 1404.08 cm-1), dan ulur C-OH (1037.63 cm-1) yang memungkinkan mengandung senyawa terpenoid.
The Relationship between Stability and Ion Conduction of Trivalent Cation Doped Ceria Akram La Kilo; Kusrini Kusrini; Deasy Natalia Botutihe
Jambura Journal of Chemistry Vol 3, No 1 (2021): February 2021
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jambchem.v3i1.9870

Abstract

This research aims to study the stability of CeO2 structure which doped with trivalent oxide which become Ce1-xMxO2- ( M= Lu3+, Yb3+, Er3+, Y3+, Gd3+, Eu3+, Sm3+, dan La3+) compound through atomistic simulation, the value of x present the concentration number of the substitution dopant of Ce4+ partially and the concentration of the dopant is limited to 10%. This research is explorative theoretical using methods of computational chemistry by atomistic simulating using GULP. The objects in this study was 8 trivalent oxide with the short-range potential as the input data. Potential short-range used in this study is the Buckingham potential. The results of geometry optimization at a constant pressure showed the differences between cell parameters of doped CeO2 before and after the atomistic simulation corresponds with the experimental results is only 0.02%. The results showed that the stability of doped CeO2 structure is decreased with increasing concentrations of dopants. A decrease int he stability of CeO2 doped with Lu, Ce, Er, Gd, Eu, Nd and La is greater than the decrease in the stability of CeO2 doped with Sm, Y and Yb.
Identifikasi Kemampuan Berpikir Kritis Siswa dengan Menggunakan Five-Tier Multiple Choice pada Materi Hidrolisis Garam Pratiwi Hassan; Lukman Abdul Rauf Laliyo; Deasy Natalia Botutihe; Romario Abdullah
Hydrogen: Jurnal Kependidikan Kimia Vol 8, No 2 (2020): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (887.144 KB) | DOI: 10.33394/hjkk.v8i2.2961

Abstract

This study aims to determine the critical thinking skills of high school students on salt hydrolysis. This research is quantitative descriptive. The population used in this study were all class XI IPA SMA in Gorontalo with a total sample of 64 respondents. Collecting data using a five-level multiple choice test instrument on salt hydrolysis material with an instrument validity value of 100%. The data analysis technique used in this research is descriptive quantitative. The results obtained the percentage of indicators of critical thinking skills, namely the focus criteria or Q1 level an average of 77.60%, the Reason criteria or Q2 level of 23.95%, the inference criteria or Q3 level of 8.85%, at Situation criteria or the Q4 level of 4.34% and the Clarity criteria or the Q5 level of 3.12%. Based on the results of the study it can be concluded that the ability of high school students to think critically on salt hydrolysis is 51.56% of students are in the very low category, 46.87% of students are in the low category and 1.56% of students are in the moderate category.
Lead Metal in Water and Sediment: A Case Study of Rumbia River Deasy Natalia Botutihe; Sri Wanti Sappe; Ahmad Kadir Kilo; Jafar La Kilo; Akram La Kilo
Acta Chimica Asiana Vol. 4 No. 1 (2021)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v4i1.45

Abstract

The purpose of this study was to determine and analyze the levels of leadcontained in the water and sediments of the Rumbia River. This research was conducted in a quantitative manner. Lead levels were measured using Atomic Absorption Spectrophotometer (SSA) of Simatzu AA 500. The results showed that the leadcontent in Rumbia River water for point A1 was undetectable whereas point 2 and 3 were 0.001 mg/kg. In sediments, at point A1 is 1.8 mg/kg and at points 2 and 3 were 0.9 mg/kg. The level of Pb in Rumbia River water is still below the water quality standard limit for marine biota determined by the Ministry of Environment No. 51 of 2004. Similarly, lead levels in sediments are below the threshold standard for sediment quality based on sediment quality guidelines for metals and associated levels of concern to be used in doing assessments of sediment quality. In general, it can be said that the concentration of lead in the Rumbia River is still at a harmless level. However, socio-economic conditions that continue to change over time can cause changes in the level of water pollution. So there needs to be an effort and public awareness in maintaining the occurrence of increased levels of pollutants in the Rumbia River.
Deskripsi Kemampuan Kognitif Siswa pada Materi Struktur Atom Netty Ino Ischak; Siti Afdianti Domu; Deasy Natalia Botutihe; Yuszda K. Salimi; Opir Rumape; La Ode Aman; Najmah Najmah
Jambura Journal of Educational Chemistry Vol 5, No 2 (2023): Agustus
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jjec.v5i2.12832

Abstract

This research aims to determine the cognitive abilities of students in atomic structure material at SMA Negeri 1 Kabila. This research is descriptive qualitative research. This research was conducted at SMA Negeri 1 Kabila with a research sample of 66 students. Data collection uses instruments in the form of a two-tier multiple choice test. Research describing the cognitive abilities of students at SMA Negeri 1 Kabila on atomic structure material. The percentage of students' cognitive aspect abilities in the high category was (36%), in the medium category was (39%), and in the low category was (31%).
Co-Authors Ahmad Kadir Kilo Akram La Kilo Damayanti, Elok Jafar La Kilo Kusrini Kusrini La Alio La Ode Aman Lukman A. R. Laliyo Mardjan Paputungan Najmah Najmah Netty Ino Ischak Opir Rumape Pratiwi Hassan Riskah Fitriani Adam Romario Abdullah Siti Afdianti Domu Sri Wanti Sappe Yuszda K Salimi