603 research outputs found
Interview with Indra Das
No full textIndra Das is most well-recognized as the author of The Devourers (2015), a novel that won the Lambda Literary Award for straddling the genres of sci-fi, speculative, and fantasy fiction alongside LGBT themes. Das’s short fiction is widely published is horror and sci-fi anthologies, as well as magazines like Tor.com, Strange Horizons, and Asimov’s Science Fiction. He spoke candidly with Alok Amatya over email about the current literary landscape, the work of writing transgressive genre fiction, and his own experiences as an upcoming global author
Analisa Kadar Air dan Asam Lemak Bebas (ALB) CPO (CRUDE PALM OIL ) di Laboratorium Minyak Sawit Pusat Penelitian Kelapa Sawit (PPKS) Medan
No full textThe research conducted aims to determine the quality of CPO (Crude Palm
Oil) based on chemical parameters. The chemical parameters analyzed in this study
were analysis of water content and analysis of free fatty acids (ALB). Analysis of the
water content, starting with heating the frozen CPO sample until the sample thaws,
then weighing the empty cup that has been pre-heated, then adding 5 grams of CPO
sample to the cup, putting it in the oven at 130℃ for 30 minutes, cooling it using a
desiccator for 30 minutes, the sample was weighed again to obtain a constant
weight. In the analysis of free fatty acid levels, it begins with weighing a
homogeneous 7.05 gram CPO sample, then adding 75 ml of neutral alcohol, then
heating it until the sample dissolves in alcohol, then adding 2-3 drops of 1%
phenolphthalein indicator, then carrying out the analysis. Titrate with 0.25 N NaOH
solution which is indicated by a yellowish-orange color change and the results are
recorded. From the measurement results, calculations were then carried out on
samples A, B, and C, so that the results obtained for the analysis of water content
were 0.24%, 0.36%, and 0.49% and free fatty acid levels were 2.40%, 2 .21% 2.12%
for sample code C. In accordance with SNI 01-2901-2021 concerning Crude Palm
Oil for water content of 0.25-0.50% and free fatty acid content of 3, 0- 5.0 %. From
the results of these calculations, the water content of the three sampels they met the
quality standards, for the free fatty acid analysis of the three samples, they met the
SNI quality standards.42 HalamanKertas Karya Diplom
Synthesis of Cellulose Sulfate from Waste Paper through Sulfation Reaction at Mole Ratio of Sulfamate Acid: Urea Using DMSO Solvent
No full textsulfamic acid and urea as base catalyst. Preparation of waste paper samples was carried out without treatment, delignification results were carried out with the addition of NaOH 2% and NaOCl 1.75%, and isolation was carried out with the addition of HNO3 3.5%, NaOH 2%, Na2SO3 2%, NaOCl 1.75% and H2O2 10%, delignified paper produced cellulose of 19.8698 g (26.49% of the initial weight) while the isolated paper produced cellulose of 12.6462 g (16.86% of the initial weight). Synthesis of cellulose sulfate through sulfation reaction of paper cellulose with sulfamic acid and urea as base catalyst. Cellulose is sulfated by making DES (Deep Eutectic Solvent) by mixing sulfamic acid and urea at 80 ℃, then the DES mixture is reacted with cellulose that has been dissolved in Dimethyl sulfoxide (DMSO) solvent media and refluxed at 150 ℃ for 2 hours, then washed using 96% ethanol and dried at 30 ℃. Cellulose sulfate which has the highest degree of substitution is obtained from the treatment of isolated samples containing α-cellulose. The formation of cellulose sulfate is supported by FT-IR spectrophotometer with the appearance of vibrational peaks in the wave number region 3388.4 cm-1 which shows the -OH group, C-H stretching group 2892.4 cm-1, S=O group 1215.1 cm-1, C-O-C group 1051.1 cm-1 and C-O-S group 984 cm-1 which are symmetrical stretching and bending vibrations respectively. Surface morphology with SEM shows that the fiber surface on cellulose sulfate is smoother and shorter than cellulose. PSA results showed a decrease in cellulose sulfate fiber diameter.77 PagesSkripsi Sarjan
Sulfasi Alkohol Lemak Menggunakan Kompleks SO3-DMF pada Variasi Perbandingan Rantai Karbon
No full textSulfation of fatty alcohols using SO3-DMF complexes at various carbon chain ratios has been carried out. In the first stage, the SO3-DMF complex was prepared by reacting SO3 gas into DMF at a temperature of 0-4 0C with a reaction time of 3 hours, then sulfation was carried out at 100 0C for 5 hours on C8, C10, C16 and C18. From the sulfation results, the yield results were respectively 83%, 81%, 68% and 61% then the results from the du nouy ring analysis were 35.3, dyne/cm, 30.3 dyne/cm, 29, 4 dyne/cm and 33.6 dyne/cm and foam stability analysis of 0.2 cm, 0.8 cm, 0.7 cm and 1 cm.62 HalamanSkripsi Sarjan
Penentuan Kadar Kmno4 dan Klorida Pada Air Minum dengan Metode Titrimetri di Balai Teknik Kesehatan Lingkungan dan Pengendalian Penyakit (Btklpp
No full textAnalysis of KMnO4 and chloride on drinking water samples at the Center for Environmental Health and Disease Control Engineering (BTKLPP) using the Titrimetric method has been carried out. This study aims to determine the levels of KMnO4 and chloride in drinking water and compare them with quality standards set by the Regulation of the Minister of Health of the Republic of Indonesia No. 492/MENKES/PER/IV/2010. The method used is Titrimetry. The results of the analysis carried out, it was found that the levels of KMnO4 in the drinking water still met the quality standard limits, namely 7,9 mg/l in the test sample number 130, 2,19 mg/l in the test sample number 135 and 3,95 mg/l in the test sample number 145. The results of Chloride analysis of the drinking water test samples still met the quality standard limits, namely 3.998 mg/l in the test sample number 006, 1.499 mg/l in the test sample number 007 and 0.499 mg/l in the test sample number 025.44 HalamanKertas Karya Diplom
Synthesis of Sulphate Starch from Cassava Starch (Manihot esculenta) Using Sulphamic Acid-Urea in DMSO Solvent
No full textThis study examines the Synthesis of Sulfate Starch from Cassava Starch
(Manihot Esculenta) using Sulfuric Acid-Urea in DMSO Solvent. This research was
carried out in two stages, namely, the isolation of cassava starch and the sulfation
reaction with sulfamic acid in DMSO solvent with a comparison of sulfaic acid:urea
molar variation (1:1, 1:2, 1:3). An FT-IR test analysis of the molar variation of
sulfuric acid:urea obtained optimal results on the molar variation of sulfuric
acid:urea (1:2) which showed a wave number of 1207.6 cm-1 vibration stretching
group S=O. The determination of the best condition of the sample treatment can be
determined by the value of the degree of substitution resulting from the sulfur content
in the sulfate starch. Sulfate starch which has the highest degree of substitution was
obtained with a molar ratio of 1:2 with a DS value of 1.02 and a sulfur content value
of 12.32%. SEM morphological analysis of the optimum variation of sulfuric
acid:urea mole at the variation (1:2), where the morphology of the granules of
sulfate starch fibers which were initially fine became amorphous surfaces caused by
heating during the sulfation reaction compared to natural starches.63 PagesSkripsi Sarjan
Sulfasi Alkohol Lemak Menggunakan Kompleks SO3-DMF pada Variasi Perbandingan Rantai Karbon
No full textSulfation of fatty alcohols using SO3-DMF complexes at various carbon chain ratios has been carried out. In the first stage, the SO3-DMF complex was prepared by reacting SO3 gas into DMF at a temperature of 0-4 0C with a reaction time of 3 hours, then sulfation was carried out at 100 0C for 5 hours on C8, C10, C16 and C18. From the sulfation results, the yield results were respectively 83%, 81%, 68% and 61% then the results from the du nouy ring analysis were 35.3, dyne/cm, 30.3 dyne/cm, 29, 4 dyne/cm and 33.6 dyne/cm and foam stability analysis of 0.2 cm, 0.8 cm, 0.7 cm and 1 cm.62 HalamanSkripsi Sarjan
Synthesis of Sodium Starch Sulphate from Cassava Starch (Manihot esculenta) Using Sulfuric Acid
No full textSodium starch sulfate was obtained from cassava starch (Manihot esculenta), which was synthesized through the sulfation reaction using 98% H2SO4 in ethanol solvent. This research was conducted in two stages, namely, isolation of cassava starch and sulfation reaction with sulfuric acid in ethanol solvent at variations of ethanol solvent volume of 10 mL, 15 mL, and 20 mL and neutralization with 40% NaOH. The formation of sodium starch sulfate is supported by the FT-IR spectrophotometer, which shows that in the wave number region 1244.9 cm-1 and 1103.3 cm-1 is stretching vibration of the S=O group. The results of the determination of the highest degree of substitution (DS) of sodium starch sulfate was determined to determine the sulfur content obtained in the variation of the ethanol solvent volume of 20 mL, which amounted to 1.355. The results of SEM morphological analysis showed that the surface of sodium starch sulfate granules was rougher and irregular than natural starch. Electrical conductivity test showed higher current strength in ethanol solvent variation of 20 mL.64 pagesSkripsi Sarjan
Determination of Water and Free Fatty Acid (ALB) Content of Crude Palm Oil (CPO) using The Alkalimetry Titration Method PT. SDS in The Kharisma Marketing Laboratory with Nusantara (KPBN) Belawan
No full textThe research conducted aims to determine the water content and free fatty acids of Crude Palm Oil (CPO) using the alkalimetry titration method PT. SDS based on chemical parameters. The chemical parameters analyzed in this study are water content analysis and free fatty acid (ALB) analysis. Water content analysis, starting with inserting the sample pan into the moisture analyzer, then adding a CPO sample of 5 grams into the sample pan, waiting until the device sounds indicating a constant water content. The analysis of free fatty acid levels begins with weighing empty Erlenmeyer then at 0 kan, weighing CPO as much as 3 grams, then adding 50mL alcohol, then adding 2-3 drops of 1% phenolphthalein indicator, then titrated with 0.0898N. KOH solution which is characterized by an orange color change and recorded the results. From the measurement results, calculations were then carried out on samples A, B, and C so that the results for moisture content analysis were obtained which were 0.28% for sample A, 0.26% for sample B, and 0.27% for sample C. Free fatty acid levels were 3.82% for sample A, 4.88% for sample B, and 3.86% for sample C. By SNI 01-2901-2021 concerning Crude Palm Oil for water content of 0.25-0.50% and free fatty acid content, namely 3,0-5,0 %. From the results of these calculations, the water content and free fatty acid levels have met SNI quality standards37 PagesKertas Karya Diplom
Sulfasi Miristil Alkohol dengan Menggunakan Kompleks SO3-DMF pada Variasi Konsentrasi NaOH
No full textThe sulfation reaction between myristyl alcohol and SO3-DMF complex has been
successfully done. Formation of the SO3-DMF complex by reacting DMF with SO3 gas
as a result of the reaction of phosphorus pentoxide and H2SO4. Then the sulfation
results were neutralized with the variation of NaOH solution, which is 35%, 40%,
45%, and resulting in yields of 25,88%, 37,75%, and 46,72%, respectively. Then the
results were analyzed by testing the surface tension using a du nouy ring tensiometer
and testing the stability of the foam using a vortex mixer. The result show that the
surface tension values were 32.5 dyne/cm, 24 dyne/cm, and 29 dyne/cm, respectively
and the foam stability test were 0.5 cm, 0.3 cm and 0.5 cm respectively. The best results
was neutralized with 40% NaOH solution, which was able to reduce the surface
tension value and had a foam stability up to 66% with a decrease in foam height 0.3
cm.59 HalamanSkripsi Sarjan
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