JURNAL KIMIA MULAWARMAN
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Potensi Pemanfaatan Ekstrak Kubis Ungu (Brassica oleracea L.) sebagai Indikator Asam Basa Alami
Get PDFThe study of potential use of extracts and fractions of purple cabbage (Brassica oleracea L.) as an indicator of acid-base has been conducted. This research aims to determine the color change at a certain pH to extract total, n-hexane, ethyl acetate and methanol fraction. Based on the results of the test changes color only total extracts and methanol fraction that is suitable as indicator. Statistical test that the t test for total titration end point extracts, t calculate is smaller than t table [0.4241 <2.776], it showed no significant difference between the endpoint using the total extract with bromine thymol blue indicator. While the endpoint for methanol fraction having t calculategreater than t table [6.323> 2.776],indicating the end point of the titration using methanol fraction was significantly different compared with bromine thymol blue indicator.Keywords: Brassica oleracea L, indicator, and acid-bas
UJI KADAR ASAM LAKTAT PADA KEJU KACANG TANAH (Arachis hypogaea L.) BERDASARKAN VARIASI WAKTU DAN KONSENTRASI BAKTERI Lactobacillus bulgaricus DAN Streptococcus lactis
Get PDFThe research has done of “Test content of free fatty acids in cheese peanut (Arachis hypogaea L.) by variations storage period difference and the concentration of bacteria Streptococcus lactis and Lactobacillus bulgaricus.” The cheese processing includes: coagulation, formation or salting and storage period. And the addition of skim milk and starter bacteria Streptococcus lactis and Lactobacillus bulgaricus. In the research purpose for determination the effect of concentration of starter bacteria Streptococcus lactis and Lactobacillus bulgaricus and storage period difference to free fatty acid of peanut cheese. This research used 2 factors and conducted by three time repetition. The first factor was the concentration of starter (1%, 2% and 3%) and the second factor storage period (5, 10 and 15 days). The results showed that the highest free fatty acid of starter bacteria at a concentration of 3% and storage period of 10 and 15 days. The lowest free fatty acid of starter bacteria at a concentration of 1% and storage period at zero day.Keywords: Peanut, free fatty acid, fermentation, cheese
PEMBUATAN ETANOL DARI BIJI CEMPEDAK (Artocarpus champeden sp.) DENGAN HIDROLISIS MENGGUNAKAN ENZIM ALFA AMILASE DAN GLUKOLASE FERMENTASI Saccharomyces cerevisiae
Get PDFTelah dilakukan penelitian yang bertujuan untuk mengetahui potensi dari biji cempedak (Artocarpus champedan sp.) sebagai bahan baku pembuatan etanol, sekaligus mengetahui apakah variasi penambahan nutrisi ammonium sulfat dan lamanya waktu fermentasi dapat meningkatkan konsentrasi etanol yang dihasilakan. Proses hidrolisis pati dilakukan secara enzimatis melalui tahap liquifikasi dan sakarifikasi dengan menggunakan enzim alfa-amilase dan glukolase yang akan mengkonversi pati menjadi glukosa. Hasil hidrolisis ditambahkan amonium sulfat sebagai sumber nutrisi dengan variasi 0,1 %, 0,3 % dan 0,5 % (b/v) kemudian difermentasi dengan variasi waktu 4, 5 dan 6 hari. Konsentrasi etanol tertinggi berada pada penambahan nutrisi amonium sulfat 0,3 % (b/v) dengan waktu fermentasi 6 hari sebesar 8,233 %.Telah dilakukan penelitian yang bertujuan untuk mengetahui potensi dari biji cempedak (Artocarpus champedan sp.) sebagai bahan baku pembuatan etanol, sekaligus mengetahui apakah variasi penambahan nutrisi ammonium sulfat dan lamanya waktu fermentasi dapat meningkatkan konsentrasi etanol yang dihasilakan. Proses hidrolisis pati dilakukan secara enzimatis melalui tahap liquifikasi dan sakarifikasi dengan menggunakan enzim alfa-amilase dan glukolase yang akan mengkonversi pati menjadi glukosa. Hasil hidrolisis ditambahkan amonium sulfat sebagai sumber nutrisi dengan variasi 0,1 %, 0,3 % dan 0,5 % (b/v) kemudian difermentasi dengan variasi waktu 4, 5 dan 6 hari. Konsentrasi etanol tertinggi berada pada penambahan nutrisi amonium sulfat 0,3 % (b/v) dengan waktu fermentasi 6 hari sebesar 8,233 %
Kata Kunci: Etanol, Biji Cempedak (Artocarpus champedan sp.) dan Fermentasi
AKTIVITAS ANTIOKSIDAN SENYAWA FLAVONOID DARI Macaranga pearsonii Merr.
Get PDFTiga senyawa flavanon , 4’-O-metil-8-isoprenileriodiktiol (1), 4’-O-metil-8-isoprenilnaringenin (2) and Lonkokarpol A (3) , telah diisolasi dari ekstrak metanol daun Macaranga pearsonii Merr. Elusidasi struktur senyawa berdasarkan data spektroskopi UV, 1D and 2D NMR, and HREISMS. Senyawa 1 – 3 ditentukan aktivitas antioksidannya terhadap peredaman radikal bebas 2,2-diphenyl-1-picrylhydrazyl (DPPH), dengan nilai IC50 adalah 536,89 μM, 1226,11 μM dan 426,43 μM.Tiga senyawa flavanon , 4’-O-metil-8-isoprenileriodiktiol (1), 4’-O-metil-8-isoprenilnaringenin (2) and Lonkokarpol A (3) , telah diisolasi dari ekstrak metanol daun Macaranga pearsonii Merr. Elusidasi struktur senyawa berdasarkan data spektroskopi UV, 1D and 2D NMR, and HREISMS. Senyawa 1 – 3 ditentukan aktivitas antioksidannya terhadap peredaman radikal bebas 2,2-diphenyl-1-picrylhydrazyl (DPPH), dengan nilai IC50 adalah 536,89 μM, 1226,11 μM dan 426,43 μM.
 
PENENTUAN KADAR ION Pb 2+ (TIMBAL) DALAM RAMBUT KARYAWAN BENGKEL DI KOTA SAMARINDA
Get PDFResearch on the determination of Pb 2+ ions (lead)in hair repair shop employee in the city of Samarinda. This study aims to determine whether there is a relationship between the concentration of lead ions in the workshop employees hair against old age and work. Measurements of Pb 2+ ions (lead) was performed using Atomic Absorption Spectrophotometer (AAS). Hair cut into small pieces, washed, crushed or burned into ashes and homogenized and analyzed by Atomic Absorption Spectrophotometer (AAS). The results obtained from the measurement and analysis of Pb 2+ ions concentration in hair repair shop employee is 0.2193 ppm and 0.3665 ppm lowest to highest. At the workshop employees there is a relationship between age and levels of Pb 2+ ions (lead) in the hair, while there was no correlation between long working white Pb, it’s based on a statistical analysis of the results of the determination coefficient and linear regression.
ANALISIS TOTAL SULFUR TERHADAP SAMPEL FEED GAS DENGAN MEMBANDINGKAN STANDAR GAS DAN STANDAR LIQUID MENGGUNAKAN METODE TS-100V
Get PDFThe total sulfur analysis in the feed gas sample by using standard gas and liquid has been researched. The concentration of total sulfur obtained from a calibration curve by using standard gas or liquid by TS - 100V. Based on the analysis of measurement linearity, by making curve a linearity from a standard gas H 2 S was 0.999 and standard liquid dibutyl sulfide was 0.998, where both the standard curve can be as a calibration curve because each the value of the correlation coefficient (r) having worth >0.995. Based on the analysis of measurement precision namely repeatability by measuring a feed gas sample train G as many as 5 times been gained. RSD value was 4.17 in standard gas and 4.70 in standard liquid. Both the calibration curve has been accepted because the relative standard deviation values less than 0.67 from Horwitz and still into get allowed range values from 7.3 to 11%. Based on the analysis of accuracy’s measurement is percent recovery for the standard gas was 100.578% and for standard liquid was 104.380%. Both of them has been accepted because it still fit in the allowed range values 80-110%.Keywords : Total Sulfur, H 2 S Standard Gas, Standard Liquid Dibutyl Sulphites and TS-100
PEMANFAATAN INFUS KAYU SECANG (Caesalpinia sappan L) DALAM FORMULA SEDIAAN PEWARNA RAMBUT
Get PDFSediaan pewarna rambut adalah kosmetika yang digunakan dalam tata rias rambut untuk mewarnai rambut, baik untuk mengembalikan warna rambut asli atau mengubah warna rambut asli menjadi warna baru. Salah satu bahan alam yang dicoba sebagai pewarna rambut adalah serbuk kayu secang (Caesalpinia sappan). Batang dan daun mengandung alkaloid, tanin, fitosterol dan zat warna brazilin. Tujuan penelitian ini adalah untuk mengetahui formula yang terbaik pada sediaan pewarna rambut infus kayu secang (Caesalpinia sappan L.) Sampel yang digunakan adalah serbuk kayu secang yang didapat dari pasar tradisional Yogyakarta. Jenis penelitian yang dilakukan merupakan eksperimental dengan variasi konsentrasi infus kayu secang serta variasi konsentrasi pirogalol dan tembaga (II) sulfat. Sediaan pewarna rambut dibuat dengan formula A1, A2, A3, B1, B2, B3, C1, C2, dan formula C3, dimanakonsentrasi masing-masing formula A, B, dan C terdiri dari pirogalol 0,5%, 1%, 1,5%, tembaga (II) sulfat 0,8%, 1,2%, 1,6%, dan infus kayu secang formula A1; A2; A3; B1; B2; B3; C1; C2; dan C3 dengan konsentrasi masing-masing 10%; 20%; 30% serta aquadest digunakan sebagai pelarut. Pewarnaan dilakukan dengan cara perendaman rambut uban selama 1-4 jam dan dicatat perubahan warna yang terjadi setiap 1 jam. Pewarnaan terbaik ditunjukkan dengan perubahan warna yang lebih jelas dari tiap jam perendaman. Evaluasi yang dilakukan meliputi pengamatan secara visual yaitu stabilitas warnaterhadap pencucian dan stabilitas warna terhadap sinar matahari. Hasil penelitian menunjukkan bahwa perubahan warna sudah terlihat jelas pada formula B3 yang terdiri dari infus serbuka kayu secang 30%, pirogalol 1%, dan tembaga (II) sulfat 1,2%. Sediaan ini menghasilkan warna rambut dari cokelatpirang sampai coklat gelap. Pada uji stabilitas terhadap sinar matahari, hasilnya menunjukkan bahwa terjadi perubahan warna menjadi lebih gelap, sedangkan uji stabilitas terhadap pencucian, tidak terjadi perubahan warna setelah 3 kali pencucian. Penelitian menunjukkan bahwa konsentrasi yang dapat menghasilkan warna terbaik yaitu fomula B3 (konsentrasi infus kayu secang 30%, pirogalol 1%, tembaga (II) sulfat 1,2%), dan infus kayu secang dapat digunakan ke dalam sediaan pewarna rambut bentuk larutan dengan menghasilkan warna coklat gelap pada formula B selama 4 jam perendaman.Kata Kunci: Caesalpinia sappan L., Sediaan Pewarna Rambut, Larutan, Infus, Formul
ISOLASI, IDENTIFIKASI DAN UJI TOKSISITAS SENYAWA FLAVONOID FRAKSI KLOROFORM DARI DAUN TERAP (ARTOCARPUS ODORATISSIMUS BLANCO)
Get PDFThe research about the characterization of flavonoid compound from the leaves of plants applicability chloroform(artocarpus odoratissimus Blanco). Extraction plants done by maceration method and separation of compounds wasperformed using the technique of vakum liquid chromatography and chromatography colomn flash. Separation resultobtained yellowish-white powder. Resul spectrum UV-visible absorption obtained namely the 254.37 to 181.28 areaabsorbance wavelength (nm), while FT-IR analysis result provide absorption at wavenumber there is an alkyl group, ahydroxyl group, an aromatic group and C-O-C stretching based on the data spectrum UV an IR spektrun can beconcluded that the compounds suspected isolated belonged to the Flanva-3-ol. Toxicity was conducted for prawn larvaeArtemia salina Leach. Effect of toxicity from isolate identified with presentage of prawn larva and counted by probitanalysis (LC 50 ). The results of this test showed that the the isolate was very toxic with LC 50 value of 26,8824 ppm. Thetest result obtained mortality of shrimp larvae LC 50 value of each sample is 110.5176 ppm total extract, chloroformfraction 147.7895 ppm, and isolate 80.2568 ppm.Keywords : Terap (Artocarpus odoratissimus Blanco), Isolation, Flavonoid, BSL
AKTIVITAS ANTIHIPERGLIKEMIK DARI EKSTRAK ETANOL DAN n-HEKSANA DAUN KEMBANG BULAN [Tithonia diversifolia A.Gray] PADA TIKUS PUTIH JANTAN
Get PDFPhytochemical test and antihyperglicemic activity from ethanol extract dan n-hexane extract from kembang bulan (Tithonia diversifolia A.Gray) leaf has been carried out. Based on the test result of phytochemistry of secondary metabolites compounds from kembang bulan (Tithonia diversifolia A.Gray) leaf showed that ethanol extract fraction containing flavonoid, fenolik, alkaloid and saponin. Whereas at n-hexane extract fraction containing alkaloid, saponin and steroid. Antihyperglicemic activity test using the method of glucose tolerance where a white male rats got induced by sucrose. Measurement of blood sugar levels using glucometer and glucose test strip. From this test shows that the most active fractions to reduce blood sugar levels was ethanol extract with a dose of 77 mg/kg BB with percentage of blood sugar levels reduction in the amount of 54.15 % it was close with reduction percentage from acarbose as positive control in the amount of 55.57 %.Phytochemical test and antihyperglicemic activity from ethanol extract dan n-hexane extract from kembang bulan (Tithonia diversifolia A.Gray) leaf has been carried out. Based on the test result of phytochemistry of secondary metabolites compounds from kembang bulan (Tithonia diversifolia A.Gray) leaf showed that ethanol extract fraction containing flavonoid, fenolik, alkaloid and saponin. Whereas at n-hexane extract fraction containing alkaloid, saponin and steroid. Antihyperglicemic activity test using the method of glucose tolerance where a white male rats got induced by sucrose. Measurement of blood sugar levels using glucometer and glucose test strip. From this test shows that the most active fractions to reduce blood sugar levels was ethanol extract with a dose of 77 mg/kg BB with percentage of blood sugar levels reduction in the amount of 54.15 % it was close with reduction percentage from acarbose as positive control in the amount of 55.57 %
PENGARUH VARIASI WAKTU FERMENTASI TERHADAP KADAR LAKTOSA, LEMAK, pH DAN KEASAMAN PADA SUSU SAPI YANG DIFERMENTASI MENJADI YOGURT
Get PDFYogurt is a fermentation milk product with bacteria Streptococcus thermophillus and Lactobacillus bulgariccus which has been commonly used in the process of making yogurt. The purpose of this study was to determine the effect of fermentation on the levels of lactose, fat, pH, acidity in yogurt. Determination of lactose in volumetric according Gohr, fat content carried by the Gerber method, using a pH meter pH and acidity values using titration.Keywords : lactose, fat, pH, acidity, fermentation, yogurt