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All Journal Journal of Applied Chemical Science Indonesia Chimica Acta Indonesian Journal of Chemistry Chemistry Indonesian Journal of Chemical Research Jurnal Fisika : Fisika Sains dan Aplikasinya Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Jurna Beta Kimia
Luther Kadang
Department Of Chemistry Faculty Of Science And Engineering, Nusa Cendana University
Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Physics

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The Essential Oils from Rhizome Extracts of Acorus Calamus Linn Are Potential Herbal Insecticides against Plutella Xylostella Linn Pests Febri Odel Nitbani; Luter Kadang; Cristiani D. Q. M Bulin
Journal of Applied Chemical Science Volume 1, No. 1 , 2012
Publisher : Journal of Applied Chemical Science

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Abstract

The present study was conducted to elucidate the activity of essential oil from rhizome extracts of Acorus Calamus Linn as an herbal insecticide against Plutella xylostella Linn pests. The oil from the Acorus Calamus roots was extracted by a water steam distillation method and found 0.005% content. Antifeedant testing was performed by trial option, while insecticidal activity was carried out by feeding and contacting methods. The results showed that the oil have activity as an herbal insecticidal and as an appetite inhibitor to the Plutella xylostella Linn pests. The maximum resistance index values ​​obtained from eating essential oils at concentrations of 4.0% was equal to 80.815%. The toxicity values of the oils, reported as LC50, ​​ as insecticides by the feeding trial and contacting methods were 1.33% and 1.27%, respectively. Those results conclusively indicated that the essential oils of the Acorus Calamus Linn potentially protect the cabbage leaves from the Plutella xylostella Linn pest attacking.
The Activated Charcoal of Hazelnut Shell (Aleurites moluccana) Has Potential Capability to Refining Used Cooking Oil Desiana Sanang; Luther Kadang; Theodore Y. K. Lulan
Journal of Applied Chemical Science Volume 1, No. 1 , 2012
Publisher : Journal of Applied Chemical Science

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Abstract

The research that aims to determine the ability of chandlenut shell activated carbon as adsorbent on purification adible frying oil has been done. Frying oil purification process includes of the removal phase seasoning (despicing), neutralization and bleaching using activated carbon. The results showed that the optimum amount of chandlenut shell activated carbon which interacted with adible frying oil on purification process at 0,75 grams, effectively lowering the acid value (0,2984 mg KOH / g), peroxide value (3,2847 meq / Kg), water content (0,1468%) and free fatty acid levels (0,1261%), and increasing numbers saponification (196,2711 mg KOH / g) and also clear oil. However, peroxide value and oil colors result of interacted with the chandlenut shell activated carbon, do not meet the National Standard of Indonesia.
Isolation and Characterization of Cinnamaldehyde Contained in Stem Barkof Cinanamon (Cinnamomumburmannii) Yublina O. Gelang; Theo da Cunha; Luther Kadang
Journal of Applied Chemical Science Volume 1, No. 1 , 2012
Publisher : Journal of Applied Chemical Science

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Abstract

The research about isolation and characterization of cinnamaldehyde compund that implied in skin steam of cinnamon (Cinnamomum burmannii) was done. Isolation method that used in this research is steam distillation. Cinnamon oil that result from steam skin of cinnamon in this research was 1,2 g (0,012 %). Cinnamon oil then isollated with slim chromatographic method using eluen-n hexane and ethanol with comparison 9:1, 7:3, and 1:1. Characterization cinnamon oil using Infrared spectrophotometer (IR) analysis and Gas Chromatographic- Mass Spectrophotometer (GC-MS). The analyzed result of Infrared spectrophotometer (IR) is giving absorbtion at range 1730,03 cm-1 that be character of aldehida as basic design cinnamaldehyde, while the result of GC analyzed is getting cinamaldehyde concentration 2,37%.
The Characteristics of Synthetic Chitosan Prepared from Snail Shells of Achatina Fulica Jacob A. Frans; Suwari; Luther Kadang
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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Abstract

A synthetic chitosan prepared from snail shells of achatina fulica has been done. The chitosan was yielded by the isolation stages that involved deproteinization, demineralization, and deacetylation that was by NaOH 3.5%, HCl 1 M, and 50% NaOH, respectively, and followed by determination of moisture content, ash content, viscosity, degree of deacetylation and functional groups. The moisture and ash contents were determined by a gravimetric method, the viscosity was by Ostwald instrument, while the degree of deacetylation and the functional groups were by FT-IR. The results showed that using those protocols provided 23.20% of chitosan content from the original snail shell material. The chitosan yielded had (in %) moisture and ash contents, viscosity, and degree of deacetylation were 0.24, 20.0, 198.3, and 68.5%, respectively. The functional group detected that involved –OH group was appeared at 3433.06 cm-1, while the -CH2- asymmetry and -CH2- symmetry were appeared at 2923.88 cm-1 and 2875.67 cm-1, respectively. The functional groups of -CH3-, C=O amide, and C-N aliphatic amines were appeared at 2979 cm-1, 1789.82 cm-1, and 1494.73 cm-1, respectively. The twin band of -NH2 was not found because of overlapping occurred between the -OH and-NH amine groups.
The Water Quality Status of Kupang Tilong Dam Reported by the Pollution Index Parameters Nurlailah D. Kartika; Suwari; Luther Kadang
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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Abstract

There has been reported the water quality status of Kupang Tilong Dam using pollution index parameters. The water samples were taken from five stations and determined using purposive sampling method. The pollution index parameters analyzed were temperature, pH, dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total solid suspended (TSS), N-nitrate, P-phospate, and water discharge. The results showed that temperature and pH were 25-28.5ºC and 7.54-7.61 pH units, respectively, while the DO, BOD, COD, TSS, N-nitrate, and P-phosphate values (in mg/L) were 8.26-12.5, 1.63-3.04, 11.26-47.37, 4.73-6.28, 0.019-0.043, and 0.01-0.16 mg/L, respectively. The pollution loads detected on station I within water discharges of 250 m3/s could receive the BOD, COD and TSS loads by 236.67, 3681.16, and 488.52 tons/year, respectively. While the station II within water discharges of 0.15 m3/s could receive 126783.01, 2210094.72, and 290587.56 tons/year, respectively. Those results indicated that the water quality status of Kupang Tilong Dam is in a state between a good quality up to a slight polluted that was 0.80 to 3.18 of pollution index value.
Utilization of Java Acid Seed (Tamarindus indica) Extract as a Coagulant in Tofu Waste Treatment Process: Short Communication Meri Letik; Luther Kadang; Suwari
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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Abstract

A study concerning the utilization of java acid seed (tamarindus indica) extract as a coagulant to be developed further for tofu wastewater treatment has been conducted. This study aimed to determine the optimum concentration of tamarind seed coagulant and to know the ability of the coagulant to reduce the concentration of total solid suspended (TSS), biochemical oxygen demand (BOD), chemical oxygen demand (COD) and amonia at optimum pH and temperature. In this study, jar-test method was used to confirm the effective dose of tamarind seed extract in reducing turbidity of the water samples analyzed. The applied concentrations of the seed extracts were 2000, 4000 and 6000 ppm. The results showed that the optimum dosage to reduce TSS, BOD and ammonia was 2000 mg/L and the COD was 4000 mg/L . At the optimum concentrations, the coagulant ameliorated up to 92.92% of BOD, 91.30% of COD, 83.34% of TSS, and 97.46% of ammonia levels and the water treated was found visually clear. Those results conclusively indicates that the coagulant made from the tamarind seed ameliorates effectively the BOD, COD, TSS, and ammonia contents as well as the turbidity levels of the water samples flowing from the tofu industry.
The Effects of Rice Washing and Storage of White Rice in Magic Com on Vitamin B1 (Thiamine hydrochloride) Contents Marieta H. Ilatha; Luther Kadang; Febri O. Nitbani
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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There has been conducted the research to know the effect of rice washing and white rice storage in magic com against vitamin B1 (tiamin hydrochloride) contents. The water used in rice washing was tap water and aquadest. The presences of the building block elements of the vitamin B1 in washing water qualitatively indicated the effects of each type of the water, while the contents of the vitamin either in rice or in washing water was determined by UV-Vis spectrophotometer at wave length of 385 nm. The results showed that the sulfur and chlorine elements, the building block elements of the vitamin, were found in tape water but those elements were not found in aquadest. The vitamin contents of the rice in magic com was up to 0.214 mg/kg, the washing water of stage I, II, and III were 0.096, 0.094, and 0.183 mg/L, respectively. Those results conclusively indicate that the elements contained by the washing water determine the presences of the vitamin building block elements in the rice washing water and therefore reduced the vitamin contents of the rice. The more interesting information of this study was reported in the main article.
Molecular Docking of Chemical Compounds from n-Hexane Extract of Moringa oleifera Seeds with E.coli and S.aureus ATP Synthase Subunit C Fredy Saudale; Apriono Sutiono; Luther Kadang; Early G. Boelan; Origenes B Kapitan
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 13, No 2: December 2020
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ica.v13i2.11536

Abstract

The development of new antibiotics is an urgent need amidst the reported increase in bacterial resistance. The n-hexane extracts of Moringa oleifera seeds have been known to have antibacterial effects against E.coli and S.aureus. However, the mechanism of inhibition and the protein from these bacteria targeted by the chemical compounds from n-hexane extracts of Moringa seeds remains elusive. ATP synthase subunit c (ATPase c) plays an important role in the synthesis and hydrolysis of ATP providing energy for bacterial growth. It is an attractive for the new antibiotic development. This study aims to computationally study the interaction between the chemical compound from n-hexane extract of Moringa seeds and ATPase c from E. coli and S. aureus that may shed the light on their inhibitory potentials using molecular docking method. The compound trans-9-octadecenoic acid shows the highest affinity energy with ATPase c from E. coli (-4.1 kcal/mol). Meanwhile, 9-cis-octadecanoic acid and glycerol-1,3-dioctadecanote show the highest interaction (-4.3 kcal/mol) with ATPase c from S.aureus. Nonetheless, these interaction energies are lower than a positive control Tomatidine on ATPase c E.coli (-6.9 kcal/mol) and S. aureus (-6.2 kcal/mol). Further in vitro assays are needed to validate their potential as novel antibacterial candidates.
ADSORPSI ZAT WARNA NAPHTOL MENGGUNAKAN ADSORBEN KULIT BUAH KAKAO (Theobroma cacao L.) Novita Santalia Nika; Imanuel Gauru; Luther Kadang; Theodore Y. K. Lulan
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 7 No 1 (2022): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

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Abstract

Abstrak Penelitian adsorpsi zat warna naphtol menggunakan adsorben kulit buah kakao (Theobroma cacao L.) telah dilakukan. Penelitian ini bertujuan untuk mengetahui karakteristik adsorben arang aktif kulit buah kakao (Theobroma cacao L.), mengetahui pengaruh pH, waktu kontak dan konsentrasi adsorpsi arang aktif kulit buah kakao (Theobroma cacao L.) terhadap zat warna naphtol dan mengetahui kapasitas adsorpsi arang aktif kulit buah kakao (Theobroma cacao L.) terhadap zat warna naphtol. Metode yang digunakan dalam penelitian ini adalah adsorpsi. Hasil yang diperoleh yaitu karakteristik dari adsorben arang aktif kulit buah kakao hasil analisis FTIR menunjukan bahwa adsorben kulit buah kakao teraktivasi HCL mengandung gugus fungsi –OH, C-H, CH2, C-O dan C=C aromatik, hasil analisis SSA diperoleh luas permukaan sebesar 178,10 m2/g, dengan volume pori sebesar 0,16 cc/g dan ukuran pori sebesar 1,80 nm. Kondisi optimum adsorben arang aktif kulit buah kakao terjadi pada pH 4, waktu kontak 90 menit dan konsentrasi 60 ppm. Kapasitas adsorpsi arang aktif kulit buah kakao dalam mengadsorpsi zat warna naphtol adalah sebesar 5,8651 mg/g. pola isoterm adsorpsi mengikuti isoterm langmuir dengan nilai R2 sebesar 0,8275 dan energi adsorpsi sebesar 25,627905 KJ/mol. Abstract Research on the adsorption of naphtol dyes using cocoa pods (Theobroma cacao L.) as an adsorbent has been carried out. This study aims to determine the characteristics of the adsorbent of activated charcoal cocoa pods (Theobroma cacao L.), determine the effect of pH, contact time and adsorption concentration of activated charcoal cocoa pods (Theobroma cacao L.) on naphtol dyes and determine the adsorption capacity of activated charcoal skins. cocoa pods (Theobroma cacao L.) against naphtol dyes. The method used in this research is adsorption. The results obtained are the characteristics of the activated charcoal adsorbent of cocoa pods. FTIR analysis results show that the adsorbent of activated cocoa pods HCL contains functional groups –OH, CH, CH2, CO and C=C aromatics, the results of SSA analysis obtained a surface area of ​​178.10 m2/g, with a pore volume of 0.16 cc/g and a pore size of 1.80 nm. The optimum condition of activated charcoal adsorbent of cocoa pods occurred at pH 4, contact time of 90 minutes and concentration of 60 ppm. The adsorption capacity of activated charcoal of cocoa pods in adsorption of naphtol dye was 5.8651 mg/g. The adsorption isotherm pattern followed the Langmuir isotherm with an R2 value of 0.8275 and an adsorption energy of 25.627905 KJ/mol.
TERMODINAMIKA ADSORPSI Ca(II) DAN Cd(II) PADA ADSORBEN AMPAS TAHU Hermania Em Wogo; Luther Kadang; Magdalena A. Mir
Jurnal Sains dan Terapan Kimia Vol 8, No 2 (2014)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (190.596 KB) | DOI: 10.20527/jstk.v8i2.2141

Abstract

Telah dilakukan penelitian untuk mengetahui kemampuan ampas tahu sebagai adsorben dalam mengadsorpsi Ca(II) dan Cd(II) baik secara tunggal maupun simultan. Penelitian ini dilakukan dalam beberapa tahap yaitu preparasi adsorben, karakterisasi adsorben yang meliputi penentuan kadar air, gugus fungsi, keasaman permukaan, dan luas permukaan, serta penentuan kemampuan adsorben dalam mengadsorpsi kedua jenis logam tersebut. Hasil penelitian menunjukkan bahwa kadar air adsorben (6,802%), gugus fungsi yang berperan dalam proses adsorpsi (-NH, -OH, dan C=O), keasaman permukaan (7 μmol/g) dan luas permukaan (7,843 m2/g). Adapun kapasitas adsorpsi Ca(II) lebih besar dari Cd(II) baik tunggal maupun simultan dimana nilai kapasitas adsorpsi Ca(II) tunggal (2.857,143 μmol/g), Ca(II) simultan (2.272,727 μmol/g), Cd(II) tunggal (806,452 μmol/g), Cd(II) simultan (769,231 μmol/g). Namun energi adsorpsi Cd(II) lebih besar dari Ca(II) baik tunggal maupun simultan, dimana nilai energi adsorpsi Cd(II) tunggal (20,995 kJ/mol), Cd(II) simultan (21,439 kJ/mol), Ca(II) tunggal (13,577 kJ/mol) dan Ca(II) simultan (13,761) yang sejalan dengan konsep asam basa keras lunak. Kata kunci: adsorpsi, ampas tahu, tunggal, simultan 
Co-Authors Apriono Sutiono Christiani Dewi Q. M. Bulin David Tambaru Desiana Sanang Dodi Darmakusuma Erly Grizca Boelan Fidelis Nitti Fredy Saudale Hermania Em Wogo Imanuel Gauru Jacob A. Frans Kapitan, Origenes Boy Kothan, Domonika Pransa Lapailaka, Titus Magdalena A. Mir Marieta H. Ilatha Meri Letik Modhe, Katarina Naat, Johnson N. Novita Santalia Nika Nurlailah D. Kartika Philiphi de Rozari Pingak, Redi Kristian Pius Dore Ola Rensini, William Antoni Sherlly Ledoh Suwari Theo Da Cunha Theodore Y. K. Lulan Wendelina Archangela Ati Yublina O. Gelang