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All Journal VALENSI Chemistry Notes
Lerrick, Reinner Ishaq
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

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Analysis of Timor’s Hyptis suaveolens L Poit Leaves Mali, Ferdianus; Wogo, Hermania Em; Lerrick, Reinner Ishaq
Chemistry Notes Vol 2 No 1 (2020): Chem. Notes 2020, 2(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v2i1.2341

Abstract

Analysis of essential oil contained in Timor Hyptis suaveolens L Poit leaves has been done over GC-MS spectrometer. By distilling of the pre-dried leave samples using Stahl apparatus, there was 0,134% colored yellow and typical oil yielded. The GC-MS detected 33 compounds mainly 16,47% of trans-caryophillene, 16,09% of 1,8-cineole, 8,32% of caryophyllene oxide, 6,67% of 3 cyclohexene-1ol,4-methyl-1-1 and 2,7,6,24% of 11-cyclotetradecatrien-1-ol. Moreover phenol-2-methoxy trans-caryopillene, a-gurjunne, phenol-2,4-bis, 1-hexadecene, a-cedrol and cembrene have been found as new chemotype in comparison to 10 suoveolens from different countries, planting condition and/or climates.
Sintesis Turunan Diarilpentanoid dari Sinamaldehida Lerrick, Reinner Ishaq; Sanit, Karolina T.; Gauru, Imanuel
Chemistry Notes Vol 4 No (1) (2022): Chem. Notes 2022, 4 (1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v4i(1).8134

Abstract

Synthesis of 1,5-Diphenylpenta-2,4-dien-1-one from local cinnamaldehyde has been done. Through aldol condensation reaction submission of local cinnamaldehyde with acetophenone in the presence of KOH resulted in 57% yellow oil confirmed as the desired product by GMMS analysis.
Analisis Penurunan Kadar TSS, COD Dan BOD Pada Limbah Cair RSUD Mgr. Gabriel Manek, SVD Atambua Nusa Tenggara Timur Dengan Metode Elektrolisis Ledoh, Sherlly M. F.; Bere, Dau D.; Darmakusuma, Dodi D.; Lerrick, Reinner Ishaq
Chemistry Notes Vol 4 No 2 (2022): Chem. Notes 2022, 4 (2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v4i2.9658

Abstract

A research on waste water treatment using electrolysis has been carried out. The purpose of this study was to determine the optimum condition of electric voltage or time in reducing the Total Suspended Solid (TSS), Chemical Oxygen Demand (COD) and Biochemical Oxygent Demand (BOD) of Mgr. Gabriel Manek, SVD hospitall’s waste effluent. The method used in this study was carbon-carbon electrolysis method. The results showed decreasing of TSS levels from 2880 mg/L to 40 mg/L with % removal of 98.61%, COD levels from 8,240 mg/L to 2,883 mg/L with % removal of 65.34% and BOD levels of 520 mg/L to 40 mg/L with a % removal of 92.30%.
Fabrication and Synthesis of Fluorescent Carbon Nanodots from Black Sticky Rice as Probes for detection Mg2+ ions Ngara, Zakarias Seba; Mamut, Anastasia; Pingak, Redi Kristian; Johannes, Albert Zicko; Lerrick, Reinner Ishaq; Refli, Refli
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 2, November 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i2.45394

Abstract

Herein, fluorescent carbon nanodots (C-dots) with average diameter of 5.51 nm were fabricated from black sticky rice by using carbonization method. These C-dots have been synthesized with magnesium (Mg2+) ions to investigate their potential application as probes for detection Mg2+ ions. The as-obtained C-dots were measured their absorption (Abs), photoluminescence (PL), and FTIR spectra, X-ray diffraction (XRD) patterns and transmission electron microscopy (TEM) image. According to their Abs spectrum, the Abs peak at 276 nm confirmed the presence of C-dots in ethanol solution. Fortunately, the PL peak at 427 nm corresponded to their blue emission color. The XRD patterns and the TEM image confirmed also the formation of amorphous state and monodispersed spherical C-dots, respectively. When the as-prepared C-dots were synthesized with Mg2+ ions, the PL intensities of C-dots quenched as increasing the concentration of Mg2+ ions. A characteristic PL quenching of the C-dots through Mg2+ chelation demonstrated the sensing system up to the detection limit of 2.98 µM. This is the first reporting the application of C-dots as sensors for detection Mg2+ ions. These findings can pave the large opportunity for application of these C-dots in sensing, bioimaging, drug delivery, and so on.
Co-Authors Bere, Dau D. Darmakusuma, Dodi D. Gauru, Imanuel Hermania Em Wogo Johannes, Albert Zicko Ledoh, Sherlly M. F. Mali, Ferdianus Mamut, Anastasia Pingak, Redi Kristian Refli, Refli Sanit, Karolina T. Zakarias Seba Ngara