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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
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Analisis Kandungan Metabolit Sekunder dan Uji aktivitas Antibakteri Jamur Endofit Batang Binahong (Anredera COrdifiolia Steenis) Ola, Antonius R B; Bria, Elisabeth Indriyani Paula; da Cunha, Theo
Chemistry Notes Vol 5 No 2 (2023): Chem Notes, 5(2), 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i2.1197

Abstract

The isolation of endophytic fungi (penicillium sp) from binahong stem had been undertaken with the objective to determine its content of secondary metabolites and its antibacterial activity. The content of secondary metabolites was analyzed with HPLC and its antibacterial activity was measured using paper disc diffusion method. The results showed that there were four compounds in the HPLC chromatogram detected at 235 nm. The antibacterial activity for methanol and ethyl acetate extracts were observed for its diameter of zone inhibition at 18.2 mm and 16.7 mm for S.aureus and 17.8 mm and 16.3 mm for E. Coli.
UJI TOKSISITAS EKSTRAK KARANG LUNAK SARCOPHYTON SP ASAL TIMOR TERHADAP LARVA ARTEMIA SALINA LEACH Dhone, Beatrix S; Theo da Cunha, TheoTheo da Cunha; Darmakusuma, Dodi
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.v1i1.1565

Abstract

Research on toxicity test of Sarcophyton sp. extract from Timor against Artemia s. Leach Nauplii has been conducted. Sarcophyton sp. from Paradiso beach, Kupang, was macerated in n-hexane, ethyl acetate, and methanol then each macerate was evaporated at 400C and 450C to dry. The dried extract resulted was tested its secondary metabolite content and toxicity using Brine Shrimp Lethality Test (BSLT). The results showed that the methanol extract contains saponins, phenols, and steroids while the ethyl acetate extract contains steroids and terpenoids. The toxicity test against artemia showed that the methanol extract from Sarcophyton sp. is very toxic to the nauplii with LC50 value of 29,56 ppm while the ethyl acetate extract is classified toxic and gave LC50 value of 34,11 ppm.
PENURUNAN KADAR LOGAM KADMIUM PADA UDANG (Peanaeus merguiensis) DENGAN PERENDAMAN CUKA NIRA ENAU (Arenga pinnata) Manu, Rolin M. P.; Tambaru, David; da Cunha, Theo
Chemistry Notes Vol 1 No 1 (2018): Chem. Notes 2018, 1(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i1.1570

Abstract

A research on the decrease of cadmium (Cd) content in shrimps by soaking them in palm (Arenga Pinnata) vinegar has been done. This study aimed to determine the removal percentage (%) of cadmium from shrimp after immersed in palm (Arenga Pinnata) vinegar and to determine the concentration and immersion time optimum in reducing the cadmium metal content in shrimps. The research was conducted in several steps namely sample preparation, determination of optimum concentration of vinegar, simulation of shrimp pollution, sample soaking in palm (Arenga Pinnata) vinegar and determination of cadmium content in samples. A two-way ANOVA test (α = 0,05) showed that the variation of palm (Arenga Pinnata) vinegar concentration has significant effect on reducing Cd content, while contact times have no significant effect on the reduction of Cd content in shrimps. It was found that the optimum concentration of palm (Arenga Pinnata) vinegar was 2% and optimum immersion time was 30 minutes. The removal percentage (%) of cadmium content from shrimps using palm vinegar reached 98.84%.
ANALISIS MINYAK KAYU PUTIH (Melaleuca cajuputi Powell) ASAL PULAU FLORES Sawu, Maria S. M.; Nitbani, Febri O.; Ishaq Lerrick, Reinner
Chemistry Notes Vol 5 No 2 (2023): Chem Notes, 5(2), 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i1.1572

Abstract

Analysis of essential oil contained in Flores’s Melaleuca cajuputi Powell leaves has been done over GC-MS spectrometer. By distilling of the pre-dried leave samples using Stahl apparatus, there was 3% of colorless and cajuputi typical oil yielded. The GC-MS detected 16 compounds mainly 63% of 1,8-cineol, 11% of α-terpineol, and 12% -terpenylacetate.
PEMANFAATAN BATU KARANG-PASIR DALAM PROSES PENGOLAHAN GREYWATER Weking, Maria Y. T.; Tawa, Bibiana D.; Ledoh, Sherlly M. F.; Gauru, Imanuel
Chemistry Notes Vol 1 No 1 (2018): Chem. Notes 2018, 1(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i1.1573

Abstract

A study of Greywater treatment has been conducted. By utilising vast local coral reefs and sand as filter media, we aimed to treat synthetic waste water in term of reducing its pH, temperature, COD, phosphates and turbidity parameter. The sample was passed gravitationally through 3 variation of filtering agent composition i.e. 1:1, 2:1 and 1:2 of coral reefs to sand ratio respectively in 2 flow rates: 0,4 and 0,8 mL/s. The collected up flow effluent was then analysed. Data resulted were then tested with ANOVA statistical test. The result showed that the mass ratio of the media and the flow rate influenced parameters. The best treatment was obtained at the 1:1 mass ratio in 0,4 mL/s flow rate. The effluent fulfilled the Indonesian water standard quality according to PP No 82 tahun 2001 and PERMENKES No 416/MENKES/PER/1990.
SYNTHESIS AND CHARACTERIZATION OF CHITOSAN-MAGNESIUM (II) COMPLEX IONS FROM SHRIMP SHELLS BILAUT, IDALIA; Gauru, Imanuel; Wogo, Hermania Em; Lapailaka, Titus
Chemistry Notes Vol 1 No 1 (2019): Chem. Notes 2019, 1(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i1.1574

Abstract

Research has been carried out on the synthesis and characterization of Mg - Chitosan complex ions from shrimp shells using crosslink method. Chitosan isolation was made in four stages, namely deproteination, demineralization, depigmentation and deacetylation. The maximum degree of deacetylation (DD) of chitosan is 89%. Based on XRD and FTIR data, chitosan obtained is in the form of amorphous and there are typical wave number of chitosan, namely 3444.91 cm-1 and 1658.4 cm-1 associated to O-H, N-H dan C=O.
Purification of Timor’s Genoak (Acorus calamus ) Essential Oil using Reduced Pressure Distillation Henci, Rensy A; da Cunha, Theo; Ishaq Lerrick, Reinner
Chemistry Notes Vol 1 No 1 (2019): Chem. Notes 2019, 1(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i1.1606

Abstract

A research about Asaron oil purification produced over Stahl distillation has been done. This research was conducted by distillation of Genoak’s roots, rhizomes and leaves whilst the purification was carried out through reduced pressure distillation. A yellowish oil was yield respectively 1,83 gram from the roots and rhizomes and 1,26 gram from leaves which then was revealed as 90,49% pure of asaron confirmed using GC-MS, 1H-NMR and FT-IR analysis.
Pemanfaatan Arang Aktif Tempurung Kemiri (Aleurites moluccana L. Willd) Sebagai Adsorben Zat Warna Naphtol Hamu, Gustafianus Velgi Hamu V; Gauru, Imanuel; Kadang, Luther
Chemistry Notes Vol 5 No 2 (2023): Chem Notes, 5(2), 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i2.1607

Abstract

It has been conducted a study about the utilization of candle nut shell coal (aleurites moluccana L. Willd) as adsorbent for naphtole dye, which it aims to know the characteristics of optimum condition covering pH, contact time, and adsorption consentration, along with the adsorption capacity of candle nut shell active coal (Aleurites moluccana L. Willd) against naphtole dye. The characteristics determination of candle nut shell active coal was done by identification of functional groups using FTIR. The determination of surface area, porous volume and porous size using SAA. The characteristics result using FTIR exhibited that the coal before and after activation contains functional groups of –OH, Csp3-H, CH2, CH3, CO Eter, aromatic C=C, and aromatic C-H. while, characterization using SAA showed the active coal surface area obtained is 17,20 m2/g with porous voleme is 0,021 mL/g and porous size is 1,60 nm. The optimum condition of adsorbent in adsorbing naptol dye is 60 ppm, takes place at pH 5 with contact time of 120 minutes. The adsorption capacity measure result of candle nut active coal obtained is 3,850 mg/g. adsorption process of naphtole dye follows Langmuir isotherm with R2 is 0.8939 and adsorption energy is 99,942 Kj/mol.
ANTIBACTERIAL AND BIODEGRADATION NATURE TEST OF EDTA-Ag IMMOBILIZED SILICA COMPOZITE PLASTICS AND CHITOSAN Wogo, Hermania Em; Ndoen, Martha C. W.; Ola, Pius Dore
Chemistry Notes Vol 1 No 2 (2019): Chem. Notes 2019, 1(2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i2.1687

Abstract

It has been conducted a research, which it aims to know the antibacterial and biodegradation nature of EDTA-Ag and chitosan immobilized silica composite plastics. Silica used was from rice hull processing products. Chitoson used was 0.3 and 0.7 g. Antibacterial assay was conducted over Staphylococcus aureusandEscherichia coli bacteria. the result obtained showed that the biggest inhibitory is at variation of chitosan 0.7 g, which over Staphylococcus aureusbacteria is 15.6 mm and Escherichia colibacteria is 16,7 mm. While, in biodegradation assay, the highest degradation percentage is at chitosan variation 0.3 g, namely 32.17%.
Mono Acyl Glycerol Compound Synthesis Through Partial Transesterification Of Castor Oil (Ricinus communis L.) using KOH as Catalyst Ratu, Marlin; Nitbani, Febri O.; Ola, Pius Dore
Chemistry Notes Vol 1 No 2 (2019): Chem. Notes 2019, 1(2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i2.1720

Abstract

It has been done a study of mono acyl glycerol compound synthesis through partial transesterification of castor oil (Ricinus communis L.) using KOH as catalyst. The product of mono acyl glycerol obtained is 45.4 % with the ratio between castor oil triglyceride and methanol 1:2 at 35 0C temperature with the amount of catalyst 0.5 % (b/b) from the reactant total weight and the reaction time 30 minutes. In this research, it was done a compound characterization using, TLC, FTIR and LC MS to prove the success of targeting compound has been synthesized.

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