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Jurnal Kimia (Journal of Chemistry)

jchem
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Published by Universitas Udayana

ISSN : 19079850 EISSN : 25992740 DOI : 10.24843/JCHEM

Core Subject : Science,

Chemistry

Jurnal Kimia (Journal of Chemistry) publishes papers on all aspects of fundamental and applied chemistry. The journal is naturally broad in scope, welcomes submissions from across a range of disciplines, and reports both theoretical and experimental studies.

Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)

Articles 518 Documents

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INTERKALASI TETRAETIL ORTOSILIKAT (TEOS) PADA LEMPUNG TERAKTIFASI ASAM SULFAT DAN PEMANFAATANNYA SEBAGAI ADSORBEN WARNA LIMBAH GARMEN P. Suarya; A. A. Bawa Putra; Devi Wisudawan
Jurnal Kimia (Journal of Chemistry) Vol. 4, No. 1 Januari 2010
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (135.786 KB)

Interchalation of Tetraethyl orthosilicate (TEOS) with acid activated clay has been studied. As forcharacterization of the modified clay. Acid-base titration methode was used to determine the surface acidity.Methylen blue method was used to determine the surface area while spectrophotometer UV-Vis was used todetermine the amount of dye adsorbted by the modified clay.The results showed that activation of clay with sulphuric acid and interchalat ion with TEOS increased thesurface acidity of the clay. The value of surface acidity of S0-0(without activation); Sa-0(interchalated with TEOS 0%);Sa-5 (interchalated with TEOS 5%); Sa-10(interchalated with TEOS 10%); Sa-15 (interchalated with TEOS 15%) were0.5064; 0.8733; 0.8486; 1.0005; and 0.8926 mmol/gadsorbent respectively. The specific surface area of S0-0; Sa-0; Sa-5;Sa-10; Sa-15 were27.2391 m2/g; 28.4019 m2/g; 28.2767 m2/g; 29.2220; m2/g dan 29.1621 m2/g, respectively. Furthermore, it was shown that, acid actived clay interchalated with 10% TEOS was the best adsorbent which adsorbed83,64% of the dye indicated by the change of the colour from dark yellow to light yellow.

KAPASITAS ADSORPSI BEBERAPA JENIS KULIT PISANG TERAKTIVASI NaOH SEBAGAI ADSORBEN LOGAM TIMBAL (Pb) Putu Eka Purnama; I Gusti Ayu Kunti Sri Panca Dewi; Ketut Ratnayani
Jurnal Kimia (Journal of Chemistry) Vol. 9, No. 2 Juli 2015
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Adsorption capacity of various types of banana skin (green, kepok and susu) activated with NaOH as adsorbents for lead (Pb) has been studied. This research consisted of several steps included determination of the surface area of activated and unactivated adsorbents, equilibrium time, adsorption isotherms and adsorption capacity of adsorbents from green, kepok and susu banana skins activated with NaOH . The results showed that adsorbents from green, kepok and susu banana skin activated with NaOH had surface were of 36.2181 m2/g, 35.5531 m2/g and 35.8378 m2/g respectively. On the other hand, the surface area of unactivated adsorbents of green, kepok and susu banana skin were 35.3105 m2/g, 35.3199 m2/g, and 35.7928 m2/g respectively. Equilibrium time for green, kepok and susu banana skin adsorbents activated with NaOH were 30; 30 and 90 minutes. Adsorption isotherms of adsorbents from green, kepok and susu banana skin activated with NaOH were at concentration 100 ppm. Adsorption capacity of activated adsorbents from green banana, kepok banana and susu banana skin were 7.022 mg/g, 5.3078 mg/g and 6.6850 mg/g respectively.

STUDI LAJU KOROSI DAN MEKANISME INHIBISI ALUMINIUM MURNI MENGGUNAKAN NATRIUM SITRAT Tiurlina Siregar
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The process of corrosion in metals is a spontaneous one that goes along with the flow of the electrons in the metal that serves as the anode to that which act as a cathode. Thus, metal corrosion is an electrochemical process. A common form of corrosion on aluminum is pitting corrosion. Pitting corrosion can occur on metal surfaces in direct contact with moist air, usually with a metal that has a thin layer of oxide. Because of the a corrosions, a variety of processes in the metallurgical industry should get special treatment to improve the corrosion resistance of the environment, ie with the addition of a corrosion inhibitor. A corrosion inhibitor is an additive in the fluid that can slow the rate of corrosion. Sodium citrate is an anodic inhibitor which is an ampifilik organic salt with both polar and non-polar groups. Sodium benzoate and sodium tartrate salt are ampifilic known as food additive, show that salts can act as corrosion inhibitor on aluminum. These findings drive the author to try Sodium Citrate as a corrosion inhibitor on aluminum which is environmentally friendly given that the benzoate salt at high levels the can’t damage environment.

PEMANFAATAN ZEOLIT ALAM TERAKTIVASI SEBAGAI ADSORBEN UNTUK MENURUNKAN BOD DAN COD PADA LIMBAH CAIR INDUSTRI TAHU Ni Wayan Trisnadewi; Ketut Gede Dharma Putra; I Nengah Simpen
Jurnal Kimia (Journal of Chemistry) Vol. 11. No.2 Juli 2017
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Limbah cair yang dihasilkan oleh industri tahu masih mengandung padatan tersuspensi dan zat terlarut yang dapat mencemari perairan. Salah satu cara yang dapat dilakukan adalah dengan cara adsorpsi. Dalam penelitian ini zeolit alam teraktivasi digunakan sebagai adsorben untuk menurunkan BOD (Biochemical Oxigen Demand) dan COD (Chemical Oxigen Demand) dalam limbah cair industri tahu. Penelitian ini bertujuan untuk mengetahui massa optimum, suhu optimum zeolit dalam limbah dan persentase maksimum pada penurunan BOD dan COD limbah cair industri tahu. Sebelum digunakan, zeolit alam diaktifkan menggunakan HCl 6 N dan NH4NO3 N, hasilnya kemudian dikalsinasi pada suhu 300 0C. Hasil penelitian menunjukkan bahwa penurunan BOD pada beberapa variasi massa, 0,5; 1,0; 1,5; dan 2,0 g berturut-turut 64,28; 71,42; 85,7; dan 78,5%, sementara penurunan COD adalah 18,5; 23,8; 35,7; dan 32,7%. Penurunan BOD pada variasi suhu 50, 40 dan 30oC. berturut-turut adalah 35,7; 42,8; dan 85,7% sementara penurunan COD berturut-turut adalah 7,9; 12,5; dan 35,7%. Penurunan BOD dan COD limbah yang diinteraksikan dengan zeolit tanpa aktivasi pada massa 1,5 g dan suhu 30 0C masing-masing sebesar 57,1% dan 3,3%.

FORMULASI SEDIAAN KRIM ANTI LUKA BAKAR DARI EKSTRAK AIR DAGING DAUN ALOE VERA P. O. Samirana; N. W. Satriani; P. R. Harfa; S. P. P. Dewi; C. I. S. Arisanti
Jurnal Kimia (Journal of Chemistry) Vol.14 No.1 Januari 2020
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Aloe vera (Aloe vera) is a plant that is empirically often used to heal burns. Aloe vera leaf meat water extract contains saponins and flavonoids, in addition it also contains tannins and polyphenols. This research was conducted to determine whether the extracted water of Aloe vera leaf meat had met the parameters of extract quality standards so that it could be used in formulations. The steps taken are the extraction of aloe vera leaf meat with the method of infundation maceration, standardization of Aloe vera meat water extraction including testing the determination of drying shrinkage, total ash content, determination of ash content which is insoluble in acid, determination of the essence of water soluble extract, determination of the extract soluble in ethanol and chemical screening, identification with FT-IR, preparation of cream preparations, evaluation of cream preparations. Aloe vera leaf meat extract was obtained by infudation technique. Tests for drying drying extract produced 26.33%, total ash content of 1.3%, water soluble extract content of 11.9% and ethanol soluble extract content of 12.01%, total flavonoid content of 2.9%. Keywords: Aloe Vera, Formulation, Cream, Burns.

SENYAWA GOLONGAN FLAVONOID PADA EKSTRAK n-BUTANOL KULIT BATANG BUNGUR (Lagerstroemia speciosa Pers.) I. A. R. Astiti Asih; I M. Adi Setiawan
Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 2 Juli 2008
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (203.626 KB)

Isolation and identification of flavonoid compounds from skin of Bungur (Lagerstroemia speciosa Pers.)have been conducted. Isolation was carried out by maceration and partition, to obtain n-hexane, ethyl-acetate, and nbutanolextracts. Concentrated n-butanol extract was purified using thin layer chromatography and columnchromatography.Isolate F2.6 from n-butanol extract contains flavonoid compounds. Uilta Violete - Visible spectra showedthat the flavonoid compounds were flavanon or dihidroflavanol, with characteristic wavelengths from 275 to 295 nmfor Band II and 350 to 400 nm for Band I. Shifting reagents added indicated no hydroxyl group at C-3 and C-5,hydroxyl group at C-7, no ortho-dihydroxyl group at ring A,B, or C, and O-glycoside at C-7. Infrared spectraindicated characteristic functional groups of O-H bonded, CH alifatic, C=O, C=C aromatic, C-O, and CH aromatic.The flavonoid compounds indicated was flavanon group, which has functional groups of O-H bonded, CHalifatic, C=O, C=C aromatic, C-O, and CH aromatic, and hydroxyl group at C-7. It does not have ortho-dihydroxylgroup at ring A,B, or C, but has O-glycoside at C-7.

ISOLASI DAN AKTIVITAS ANTIKANKER PINOSTROBIN DARI TEMU KUNCI (Kaempferia pandurata Roxb) TERHADAP FIBROSARKOMA MENCIT HASIL INDUKSI BENZOPIREN Oka Adi Parwata; Sukardiman Sukardiman; Alit Widhiartini
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 2 Juli 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Induction of apoptosis and antiangiogenesis effects of Pinostrobin from Kaempferia pandurata Roxb against Fibrosarkoma mice induced with benzopiren have been investigated. Examination begins with taking tissue of fibrosarcoma in mice infected and weighing the fibrosarcoma obtained. Fibrosarcoma tissues were then stored in 10 % formalin. Weighing results showed that pinostrobin oral concentration of 80 mg/kg can inhibit 68.62 % growth of fibrosarcoma. It was also shown that cancer drug (positive control) resulted in 95.95 % inhibition compared to the negative control. This means pinostrobin can potentially be developed as a cancer chemotherapy drug. Patohystology analysis of the fibrosarcoma tissue with HE staining on light microscope with 400x magnification showed many chromatins (polychromatin) which proved the damage caused by the fibrosarcoma cells.

SKRINING AWAL ANTITUMOR MELALUI PENDEKATAN UJI TOKSISITAS KANDUNGAN SENYAWA DALAM EKSTRAK n-HEKSANA RIMPANG TEMU PUTIH (Curcuma zedoaria (Berg.) Roscoe) Wiwik Susanah Rita; I G. A. Gede Bawa; Ni Luh Putu Lilis Wirastiningsih
Jurnal Kimia (Journal of Chemistry) Vol. 6, No. 1 Januari 2012
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (158.646 KB)

Isolation and identification of cytotoxic compounds from n-hexane extract of white turmeric rhizomes (Curcuma zedoaria (Berg.) Roscoe) has been performed. Extraction was done by maceration technique. Saponification reaction was applied to separate the fat with another lipid, separation and purification was then performed by chromatographic techniques. Toxicity tests performed by the method of Brine Shrimp Lethality Test (BSLT) using Artemia salina L. larvae, while the analysis of the most toxic isolates were performed by Gas Chromatography-Mass Spectroscopy (GC-MS).Extraction of 1700 g of dried white turmeric rhizome powder produced 39.68 g of concentrated n-hexane extracts. The results of toxicity tests with n-hexane extract of Artemia salina L. larvae was obtained LC50 values of 79.43 ppm. Saponification of n-hexane extract produced 9.18 g of n-hexane phase and 137.38 g water phase. Toxicity test indicated that n-hexane extract phase was the most toxic with the LC50 of 17.78 ppm. Then the active phase was separated and purified by gradient column chromatography and obtained 11 fractions. Fraction 11 was the the most toxic with the LC50 of 3.8 ppm. The column chromatography obtained two fractions (F11a and F11b), which F11b was the most active with LC50 of 3.5 ppm.The analysis of isolate by Gas Chromatography Mass Spectroscopy showed a mixture of compounds: tetradecane, hexadecane, 3-methylheptadecane, octadecane, 2-methyleicosane, n-docosane, and heneicosane.

KONVERSI MINYAK BIJI MALAPARI (Pongamia Pinnata L.) MENJADI BIODIESEL MELALUI PEMANFAATAN KATALIS HETEROGEN ABU SEKAM PADI TERMODIFIKASI Li Made Indra Dwitama; Muhammad Nasib; Olivia Carolyn Sitepu; Dwi Anggraeni Putri Suandi; I Nengah Simpen
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 2 Juli 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Minyak biji malapari adalah bahan baku pembuatan biodiesel yang sangat potensial. Pembuatan biodiesel dari minyak biji malapari melalui pemanfaatan katalis abu sekam padi termodifikasi litium sebagai katalis heterogen telah berhasil dilakukan. Katalis dimodifikasi melalui metode keramik pada temperatur 900oC. Setiap 1 g abu sekam padi dicampurkan dengan 1,23 g Li2CO3 dan dikalsinasi dalam furnace selama 4 jam. Katalis abu sekam padi termodifikasi litium dikarakterisasi dan diuji aktivitasnya dalam pembuatan biodiesel. Persen berat katalis optimum dalam pembuatan biodiesel juga dipelajari dengan variasi sebesar 1,3 dan 5%. Biodiesel dari minyak biji malapari yang diperoleh dianalisis kualitasnya dengan mengacu pada SNI 04-7182-2006. Penelitian ini dilakukan untuk mensintesis dan mengetahui karakteristik katalis abu sekam padi termodifikasi litium serta mempelajari kemampuannya dalam mengkonversi minyak biji malapari menjadi biodiesel. Hasil penelitian menunjukkan bahwa katalis abu sekam padi termodifikasi litium berhasil disintesis. Modifikasi abu sekam padi oleh litium mengakibatkan peningkatan kebasaan permukaan dan rasio Li:Si-nya serta mengakibatkan penurunan luas permukaan spesifiknya. Katalis abu sekam padi termodifikasi litium mampu meningkatkan efektifitas konversi minyak biji malapari menjadi biodiesel. Biodiesel yang dihasilkan telah memenuhi 2 parameter yakni densitas dan viskositas yang ditetapkan dalam SNI 04-7182-2006.

POTENSI EKSTRAK ETANOL BAWANG MERAH (Allium ascolonicum L.) DAN GARAM NaCl MENURUNKAN LUAS AREA SERTA MENINGKATKAN KONTRAKSI JARINGAN LUKA BAKAR RINGAN I M. Sukadana; S. Rahayu; Melli Melli
Jurnal Kimia (Journal of Chemistry) Vol.13 No.1 Januari 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Burns is a skin response and subcutaneous tissue to temperature or thermal trauma that affects skin damage. The weight or severity of tissue damage from burns is influenced by several factors including deep burns, burns area, burn location, general body health, injury mechanism and age. The area of ??burns and the percentage of wound contractions is an indicator of the healing process of minor burns. This study used 25 wistar rats divided into 5 treatment groups with randomized posttest only control group design as follows; K: given vaseline treatment (negative control), Kp: given bioplacenton treatment (positive control), P1: given salt treatment at 7.5% concentration in vaseline, P2: given onion extract treatment at 40% concentration in vaseline, and P3: given a mixture of onion extract 40% and kitchen salt at a concentration of 7,5% in vaseline. The result of One-Way ANOVA and Post Hoc Test LSD using SPSS for Windows version 19 shows P2 treatment group is onion extract of 40% give the best result concentration of onion extract so it is very potential to be developed further as light burning agent compared to P1 and P3 treatment group because of its ability to decrease the area of ??340,79 mm2 on the first day to 11,75 mm2 and increased wound contraction by 81,59% at the end of treatment

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Home Page

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Contact Name Ni Putu Diantariani

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Editorial Address Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

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Contact Name
Ni Putu Diantariani

Contact Email
jurnalkimia@unud.ac.id

Phone
+628123640424

Journal Mail Official
jurnalkimia@unud.ac.id

Editorial Address
Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

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Kota denpasar,

Bali

INDONESIA