cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Marlon
Contact Email
marlon.benu@staf.undana.ac.id
Phone
+6281339807217
Journal Mail Official
marlon.benu@staf.undana.ac.id
Editorial Address
Jl. Adisucipto Penfui, Kupang, NTT, Indonesia.
Location
Kota kupang,
Nusa tenggara timur
INDONESIA
Chemistry Notes
Published by Universitas Nusa Cendana
ISSN : 26221071     EISSN : -     DOI : -
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science
This journal publishes reserach(es) in the field organic, inorganic, biochemistry, physical and analytical chemistry, applied chemistry including materials, medicines and agricaltural based chemistry applications and educational chemistry. This bilingual journal (in English or in Bahasa Indonesia) is issued in 2 (two) volumes (July and December) every year.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 58 Documents
 1   2   3   4   5 
PENGUJIAN SKALA LABORATORIUM KANDUNGAN KALSIUM OKSIDA PADA BATU GAMPING KALKARENIT DAN BATUGAMPING KRISTALIN SEBAGAI BAHAN PEMBUATAN SEMEN Krisnasiwi, Ika F.
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.v2i1.2336

Abstract

Potensi batugamping di Indonesia sangat besar dan hamper merata di seluruh Indonesia. Data yang pasti mengenai jumlah cadangan batugamping di Indonesia belum ada, namun secara umum jumlah batugamping Indonesia mencapai 28,678 miliyar ton. Salah satu provinsi dengan cadangan batugamping terbesar merupakan Nusa Tenggara Timur. Penelitian yang dilakukan untuk mengetahui kadar CaO yang terkandung pada batugamping kalkarenit dan batugamping kristalin dengan metode kalsinasi menggunakan tanur listrik kemudian dilakukan analisa menggunakan XRD. Adapun hasil pengujian sampel batugamping kalkarenit dengan menggunakan tanur listrik kadar CaO yang dihasilkan sebesar 47% sedangkan sampel batugamping kristalin kadar CaO yang dihasilkan 94%.
FFAR4/GPR120 SEBAGAI TARGET DESAIN DAN PENGEMBANGAN OBAT DIABETES MELITUS TIPE 2 IN SILICO: SUATU TINJAUAN DAN PERSPEKTIF SAUDALE, FREDY Z.; TOKAN, MERVINA B.; LEO, STEVEN Y.; ATI, SERLY P.
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.v2i1.2338

Abstract

FFAR4/GPR120 is an attractive membrane protein for diabetic drug design. Crystal structure of GPCR membrane proteins is difficult to obtain. Most of GPCR proteins lack experimental 3D structures. Therefore, computational method (in silico) using comparative homology modelling has been widely applied to solve it. To develop FFAR4/GPR120 selective compounds with high specificity, homology modelling of FFAR4/GPR120 can be constructed by utilizing other known GPCR crystal structures. This review article surveys the recent developments in the application of computational approaches in searching for selective agonist ligands and provides a perspective on computational approaches to the development of new drugs targeting FFAR4/GPR120.
REDUCTION OF ANIONIC SURFACTANT IN DETERJENT FROM DOMESTIC WASTE WATER USING PUMICE AND SAND AS A MEDIA IN CONSTRUCTED WETLAND SYSTEM Selan, Fianelda Th; de Rozari, Philiphi; Nitbani, Febri Odel; Ola, Pius Dore
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.v2i1.2339

Abstract

The use of pumice and sand as a media in Constructed wetland (CW) system to reduce anionic surfactant has been carried out. This research aimed to investigation the efficiency of pumice and sand in CW system with and without plant (cymbopogon citrates) for CW anionic surfactant removal. There were six variation of CW treatments based on percentage pumice amended in the sand media. The anionic surfactant were analysed using UV-VIS spectrophotometry with metilen blue methods. Results of the analysis on oneway anova showed that the efficiency removal of anionic surfactant in inflow and outflow is significant different, on the variation of media of pumice 10% and sand 90% (CW B) reduced anionic surfactant levels efficiently from an average of 0,481 ppm ppm to 0,188 ppm with a decrease in percentage value of 60,91%.
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.
Identifikasi dan Uji Aktivitas Antioksidan Senyawa Alkaloid Daun Pepaya (Carica papaya L.) Kultivar Lokal Bulla, Reni M.; Da Cunha, Theo M.; Nitbani, Febri Odel
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.v2i1.2342

Abstract

Penelitian ini bertujuan untuk mengetahui senyawa alkaloid dan nilai kekuatan antioksidan IC50 dari ekstrak etanol daun pepaya (Carica papaya L.) kutivar lokal menggunakan metode eksperimental Laboratorium. Analisis menggunakan LC-MS diperoleh senyawa alkaloid karpain dengan memiliki berat molekul 479 g/mol. Hasil uji aktivitas antioksidan diperoleh nilai IC50 ekstrak daun pepaya kutivar lokal A maupun kultivar lokal B adalah 34 ppm dan 10,4 ppm. Hal ini dapat memperlihatkan bahwa kedua ekstrak tersebut tergolong antioksidan kuat.
The prospect of liquid-based dye sensitized solar cells (DSSCs): A Comparative Review Selan, Odi Th. E.
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.v2i1.2345

Abstract

Energy demands including electricity consumptions have been increasing rapidly inrecent years. Silicon solar cells, the most highly used cells dominating global markets,contribute significantly in providing sustainable form of energy. More importantly, itpromisingly enables people especially in rural and remote areas to have access to electricitythat could potentially stimulate rural development. However, this energy platform still suffersfor high production and maintenance costs and the use of hazardous materials. Softinterface solar cells seems to take advantage over silicon solar cell design but review articlesexplaining the advantages of this new approach are rarely found. This article provides ageneral overview about an emerging solar cell based on liquid│liquid junction interface fromchemistry perspective, highlights its benefits over silicon based solar cells and argues thatthis technology is a potential substitute for the existing ones by focusing specifically on theissues of costs, environmental impacts, electron transfer and fabrication techniques.
USE OF SEQUENT ADSORPTION WITH ACTIVATED NATURAL ZEOLITE AND ACTIVATED CHARCOAL AS ADSORBENT TO IMPROVE THE QUALITY OF WASTE COOKING OIL Ola, Pius D.; Taus, Elisabeth
Chemistry Notes Vol 5 No 1 (2023): Chem Notes 2023, 5(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v2i2.3268

Abstract

Cooking oil which is exposed to high temperatures of up to 200 °C during the cooking process, leads to the formation of hazardous substances that are potentially dangerous to human health. However, people sometimes use the same cooking oil repeatedly without considering the negative effects that it causes. In this work, we investigated the use of two different types of adsorbent namely activated charcoal and activated zeolite sequentially to improve the quality of waste cooking oil (WCO) using the adsorption method. It was found that for 30 mL of WCO, the optimum dose of adsorbent was 7.5 g and the optimum contact time was 20 minutes. When these two types of adsorbent were applied sequentially for the purification of WCO at the optimum conditions, the result obtained indicated the lower value of the acid number, peroxide number, viscosity, and water content, compared to the WCO that treated only with a single type of adsorbent.
BIOKIMIA DI ERA BIG DATA GENOMIK: TANTANGAN, APLIKASI DAN PELUANG INOVASI Saudale, Fredy Z.
Chemistry Notes Vol 2 No 2 (2020): Chem. Notes 2020, 2(2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v2i2.3270

Abstract

The completion of human genome project at beginning of 21st century with the advancement of computer technology has transformed Biochemistry into a genomic era. Further, it is accelerated by parallel and massive genome sequencing technology known as next generation sequencing (NGS) that enhances the identification of genetic variants associated with complex diseases such as cancer, diabetes and Alzheimer. Currently, this knowledge has been driving the development of precision and personalized medicine. Wisely applied, it is believed that the explosion of genomic big data can be of great use in advancing the diagnosis, therapy and drug discovery to combat complex diseases.
PEMANFAATAN ABU LAYANG (FLY ASH) SEBAGAI ADSORBEN PADA MINYAK JELANTAH Wogo, Hermania Em; Bokay, Ernawati A.; Tawa, Bibiana D.; Ledoh, Sherlly M. F.
Chemistry Notes Vol 2 No 2 (2020): Chem. Notes 2020, 2(2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v2i2.3279

Abstract

A research on the conducted on the use of fly ash as an adsorbent in used cooking oil. This research was conducted with the aim to know the characteristics of fly ash without activation and activation with 6M HCl and to improve the quality of used cooking oil from adsorbent processing based on the Indonesian national standard (SNI). This research was conducted in several stages, namely surface acidity with the titration method, determination of surface area with the blue methylene method, determination of functional groups by FTIR analysis and oil quality based on parameters of acid number, peroxide number and smoke point. The results showed that the acidity of the surface of the fly ash was activated and without activation of 4 and 3.6 m2 / g respectively. surface area of ​​fly ash without activation 17,480 m2/g at contact time 80 and activated fly ash 18,471 m2/g at contact time 70. FTIR spectra of fly ash without activation 795,38 and 779.95 cm-1 and activated 795.38 and 778,02 cm-1 which is a symmetrical stretching adsorption band of symmetric ≡Si-O (≡Si-O-Si≡). Fly ash used for refining used cooking oil (2,468 mg KOH / g) is able to reduce the acid number 0.361 mg KOH / g in activated fly ash and 0.561 mg KOH / g for fly ash without activation, the peroxide number for activated fly ash decreased by 72.34% compared to fly ash without activation 69.14%, oil smoke point purification results from activated fly ash 203ºC and without activation 210ºC which is close to the new oil smoke point value of 200ºC. When compared with SNI, the values ​​of acid numbers, peroxide numbers and smoke points meet the standard.
Chemotype of Flores Indonesia’s Ocimum santum and Cimpogon nardus L Lerrick, Reinner I.; Pake, Karolina I.
Chemistry Notes Vol 2 No 2 (2020): Chem. Notes 2020, 2(2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v2i2.3325

Abstract

A study of the essential oil content in basil (Ocimum sanctum) and red lemongrass (Cymbopogon nardus L. Rendle) originally grown in Flores island has been conducted. The purpose of this study was to identify the chemotype of the essential oils obtained over stahl distillation using GC-MS. The Ocimum mainly consisted of 55% eugenol following by minor trans-alfa-bergometena, patchulana, and linalool. Meanwhile, the chemotype of the red lemongrass (Cymbopogon nardus L. rendle) were citronellol (22%), citronella, cyclohexamethanol, and viridiflorol.

Page 2 of 6 | Total Record : 58

 1   2   3   4   5 

Filter by Year

2018 2025


Reset
Filter By Issues
All Issue Vol 7 No 1 (2025): Chem. Notes, 7(1), 2025 Vol 6 No 2 (2024): Chem. Notes, 6(2), 2024 Vol 6 No 1 (2024): Chem. Notes, 6(1), 2024 Vol 5 No 2 (2023): Chem Notes, 5(2), 2023 Vol 5 No 1 (2023): Chem Notes 2023, 5(1) Vol 4 No 2 (2022): Chem. Notes 2022, 4 (2) Vol 4 No (1) (2022): Chem. Notes 2022, 4 (1) Vol 3 No 2 (2021): Chem. Notes 2021, 3(2) Vol 3 No (1) (2021): Chem. Notes 2021, 3(1) Vol 2 No 2 (2020): Chem. Notes 2020, 2(2) Vol 2 No 1 (2020): Chem. Notes 2020, 2(1) Vol 1 No 2 (2019): Chem. Notes 2019, 1(2) Vol 1 No 1 (2019): Chem. Notes 2019, 1(1) Vol 1 No 1 (2018): Chem. Notes 2018, 1(1) More Issue