scholarly journals OPTIMIZATION OF GLYCEROL MONOLAURATE (GML) SYNTHESIS FROM GLYCEROL AND LAURIC ACID USING DEALUMINATED ZEOLITE Y CATALYST

2019 ◽  
Vol 81 (4) ◽  
Author(s):  
Didi Dwi Anggoro ◽  
Herawati Oktavianty ◽  
Bagas Prasetya Kurniawan ◽  
Roynaldy Daud
Keyword(s):  
Molecular Weight ◽  
Lauric Acid ◽  
Zeolite Y ◽  
Test Results ◽  
H2so4 Solution ◽  
Glycerol Monolaurate

Glycerol Monolaurate (GML) is used as a surfactant, preservative and emulsifier in food, besides it can be used in cosmetics and medicines. This study obtained to optimize GML synthesis from glycerol and lauric acid. It consisted of two steps, dealumination of zeolite Y catalyst and optimization of GML synthesis. At dealumination process, zeolite Y will reacted with H2SO4 solution and aquadest with temperature at 60°C for 4 hours, then drying with temperature at 110°C for 1 hour, then furnace with temperature at 500°C for 3 hours. The synthesis of GML held by reacting glycerol and lauric acid using dealuminated zeolite Y. The synthesis of GML analyzed using GC-MS to determine the structure, molecular weight, and conversion of GML produced. This study obtained GML optimization to produce the greatest yield of GML. The best test results obtained is 90.75% of GML yield and the estimated value of optimization at temperature 130°C for 4 hours, and the mole ratio of lauric acid with glycerol 1: 7.5 (with the mass of lauric acid is 25 g, and the mass of glycerol is 87.654 g).

scholarly journals Optimization of Preparation of Zeolite Y Dealuminate Catalysts for Glycerol Conversion to Glycerol Mono Laurate

2018 ◽  
Vol 156 ◽  
pp. 06006
Author(s):  
Didi Dwi Anggoro ◽  
Luqman Buchori ◽  
Istadi Istadi ◽  
R. P. Fadhil ◽  
G. Antonio
Keyword(s):  
Optimum Condition ◽  
Acid Concentration ◽  
Zeolite Y ◽  
P Value ◽  
H2so4 Solution ◽  
Mathematical Equation ◽  
Glycerol Conversion ◽  
Operating Variables ◽  
Glycerol Monolaurate ◽  
Glycerol Mono

This Research has been done to analyze Zeolite Y CBV 712 as a catalyst. Zeolite Y CBV 712 was dealuminated by treating it with H2SO4 solution, with 3 – 8 M concentration at 40 – 60 oC. The dealumination treatment runs for 4 hours. Then, dealuminated zeolite was calcinated with a furnace for 3 hours with temperature range between 500 – 600 oC. Dealuminated zeolit Y then tested to synthesize Glycerol Mono Laurate (GML). By Analysis of Variance (ANOVA) analyze, indicated that the higher Glycerol Monolaurate yield, X2 factor is the most significance factor, indicating with high F-value (29.60768) and low P-value (0.001600). Objective function from this tests, is used to determine the optimum value between dealumination temperature (X1), acid concentration used (X2) and calcinating temperature (X3). The relation between each operating variables and the responses is shown in mathematical equation below : [see formula in PDF] The optimum condition obtained is 43.25oC for dealumination temperature, 5.45 M for acid concentration and 614oC for calcination temperature. According to the optimum condition obtained, the glycerol monolaurate yield obtained is 59.470%.

Study on Improving Biodegradability of Straw Pulp Papermaking Wastewater by Coagu-Flocculation and Nuclear-Flocculation

2014 ◽  
Vol 926-930 ◽  
pp. 4361-4364
Author(s):  
Xiao Qiao Song
Keyword(s):  
Molecular Weight ◽  
Organic Pollutants ◽  
Aromatic Hydrocarbons ◽  
Removal Rate ◽  
Activated Sludge Process ◽  
Test Results ◽  
Combination Process ◽  
Coagulation And Flocculation ◽  
Flocculation Process ◽  
Papermaking Wastewater

When straw pulp papermaking wastewater was treated by the process of coagu-flocculation and nuclear-flocculation, there were still high CODCr. UV254 can reflect organic pollutants and organic pollutants of unsaturated aromatic ring, carbon-carbon double bond. With the decrease of molecular weight of organic pollutants, absorption of ultraviolet light will decrease. Indirectly, it reflectd that the combination process had a good removal effect on high molecular aromatic hydrocarbons difficult to be biodegraded. Meanwhile it can improve the the biodegradability. It used the activated sludge process as subsequent process of coagulation and-flocculation process. The test results showed that the removal rate of CODCr was 24.1%, CODCr was the 88.1mg/L. It reached effluent standard.

scholarly journals Low Molecular Weight Gelators Based on Functionalized l-Dopa Promote Organogels Formation

Gels ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 27 ◽  
Author(s):  
Demetra Giuri ◽  
Nicola Zanna ◽  
Claudia Tomasini
Keyword(s):  
Aqueous Solution ◽  
Molecular Weight ◽  
Rheological Properties ◽  
Rhodamine B ◽  
Lauric Acid ◽  
Water Solution ◽  
Preliminary Test ◽  
Low Molecular Weight ◽  
Coupling Reactions ◽  
Low Molecular Weight Gelators

We prepared the small pseudopeptide Lau-l-Dopa(OBn)2-d-Oxd-OBn (Lau = lauric acid; l-Dopa = l-3,4-dihydroxyphenylalanine; d-Oxd = (4R,5S)-4-methyl-5-carboxyl-oxazolidin-2-one; Bn = benzyl) through a number of coupling reactions between lauric acid, protected l-Dopa and d-Oxd with an excellent overall yield. The ability of the product to form supramolecular organogels has been tested with different organic solvents of increasing polarity and compared with the results obtained with the small pseudopeptide Fmoc-l-Dopa(OBn)2-d-Oxd-OBn. The mechanical and rheological properties of the organogels demonstrated solvent-dependent properties, with a storage modulus of 82 kPa for the ethanol organogel. Finally, to have a preliminary test of the organogels’ ability to adsorb pollutants, we treated a sample of the ethanol organogel with an aqueous solution of Rhodamine B (RhB) for 24 h. The water solution slowly lost its pink color, which became trapped in the organogel.

scholarly journals Efektivitas Vaksinasi Crude dan Soluble Protein Spora Myxobolus Koi terhadap Tingkat Kerusakan Usus Ikan Koi (Cyprinus carpio Koi) [ The Effectivety Crude and Soluble Protein of Myxobolus Koi Spore againts Intestine Different Degrees in Koi (Cyprinus carpio Koi)]

2019 ◽  
Vol 7 (1) ◽  
pp. 55
Author(s):  
Rachma Woro Anggarani ◽  
Gunanti Mahasri ◽  
Lucia Tri Suwanti
Keyword(s):  
Molecular Weight ◽  
Statistical Analysis ◽  
Cyprinus Carpio ◽  
Soluble Protein ◽  
Crude Protein ◽  
Soluble Proteins ◽  
Test Results ◽  
Group I ◽  
Significant Difference ◽  
Cyprinus Carpio Koi

Abstract Myxobolus koi is one species of Myxobolus sp that can cause parasitic diseases in fish called Myxobolusis. Based on the Decree of the Minister of Marine and Fisheries No: KEP.03/MEN/2010 that Myxobolus koi in the list of Fish Quarantine Pests group I. Myxosporean diseases are most numerous in the water can cause Proliferative Kidney Disease (PKD) and Whirling Disease (WD). The aim of this research is to finding, analyzing and determining the protein of spores Myxobolus koi that can effectively reduce the level of damage to the intestinal organs as well as for the prevention myxobolusis on Koi’s. Then for finding, analyzing and determining the protein of spores Myxobolus koi do isolation of spore proteins. The study consisted of three phases examination to preparation and identification of spores, isolation and analyze of crude and soluble protein spores for obtain dose and molecular weight each protein and histopathological test. This research uses descriptive method. The data presented may be narratives, images, tables or charts for each group. Intestinal histopathology test results of research carried scoring Koi’s were analyzed using the Kruskal-Wallis. The results showed a profile crude protein and soluble proteins from spores Myxobolus koi showed that the molecular weight of crude protein Myxobolus koi in this study was 150 kDa and 72 kDa and for soluble protein was 73 kDa. Results scoring the degree of infection caused by exposure to Myxobolus koi then statistically processed with an average yield of scoring in a sequence of 0; 1.6; 0.64 and 0.32. Statistical analysis showed no significant difference in the treatment of K + with crude protein, and K + with soluble proteins. Statistical analysis showed that there were significant differences in treatment with K+ and K-, K- with soluble protein and crude protein and soluble protein. Histopathological changes in the intestine in the form of inflammatory cell infiltration, necrosis and haemorage

scholarly journals Equivalence of Lauric Acid and Glycerol Monolaurate as Inhibitors of Signal Transduction in Staphylococcus aureus

2000 ◽  
Vol 182 (9) ◽  
pp. 2668-2671 ◽  
Author(s):  
Alexey Ruzin ◽  
Richard P. Novick
Keyword(s):  
Signal Transduction ◽  
Staphylococcus Aureus ◽  
Enterococcus Faecalis ◽  
Mutant Strain ◽  
Virulence Factors ◽  
Lauric Acid ◽  
Inhibitory Activity ◽  
Null Mutant ◽  
Glycerol Monolaurate ◽  
Membrane Bound

ABSTRACT Glycerol monolaurate (GML) inhibits the expression of virulence factors in Staphylococus aureus and the induction of vancomycin resistance in Enterococcus faecalis, presumably by blocking signal transduction. Although GML is rapidly hydrolyzed by bacteria, one of the products, lauric acid, has identical inhibitory activity and is metabolized much more slowly. At least four distinct GML-hydrolyzing activities are identified in S. aureus: the secreted Geh lipase, residual supernatant activity in ageh-null mutant strain, a novel membrane-bound esterase, and a cytoplasmic activity.

scholarly journals Characteristics of Chitosan from White Leg Shrimp Shells Extracted Using Different Temperature and Time of the Deasetilation Process

2019 ◽  
Vol 22 (3) ◽  
pp. 498-507
Author(s):  
Beni Setha ◽  
Fitriani Rumata ◽  
Bernita br. Silaban
Keyword(s):  
Molecular Weight ◽  
Mechanical Characteristics ◽  
Amorphous Solid ◽  
Temperature Treatment ◽  
Test Results ◽  
Degree Of Deacetylation ◽  
Shrimp Shells ◽  
Two Stages

Chitosan is a white amorphous solid chitin, and of high biological and mechanical characteristics. Chitosan production is divided into two stages. First is chitin isolation (deproteination, demineralization, and depigmentation), and second is deacetylation of chitin to chitosan. This research was aimed to determine the characteristic of chitosan isolated from the shells of the white leg shrimp  using different temperature and time in the deasetilation process. The FTIR test results showed that the chitin group was partially broken into chitosan in every treatment. The highest content of chitosan was obtained at the temperature treatment of 100℃ for 2 hours, while the highest degree of deacetylation, viscosity, and molecular weight were observed at the temperature treatment of 120℃ for 3 hours. The sample were not soluble in aquades, methanol, or ethanol indicating the samples were chitosan.

scholarly journals Perbedaan metode pembuatan VCO antibakteria terhadap sifat Fisikokimia, dan uji organoleptik, Antibakteri VCO terhadap Bakteri Staphylococcus Aureus

Jurnal Gizi ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 124
Author(s):  
Octo Zulkarnain ◽  
Suci Ferdiana
Keyword(s):  
Fatty Acids ◽  
Staphylococcus Aureus ◽  
Lauric Acid ◽  
Chronic Wounds ◽  
Bacterial Cells ◽  
Test Results ◽  
Test Analysis ◽  
Gram Positive Bacteria ◽  
Bacterial Content ◽  
Barrier Zone

Wounds have slowed healing due to the formation of biofilms, which are the surface formation of bacterial cells that are covered by the polymeric substance. Staphylococcus aureus is a gram-positive bacteria that play a role in producingmultilayer in biofilms and is very easy to resistant to antibiotics. VCO has the ability as ana anti-bacterial content based on lauric acid and kaprat acid. This study used experimental Quasy with a mixed Methode method. VCO is made with 3 methods, fishing, heating and mixing on physicochemical test. Physicochemical test results show, the highest water content is found in the VCO heating, the same three-type weight, the highest peroxide number is in the VCO mixing and the highest free fatty acids on the VCO fishing. The results of antibacterial test with Kirby-Baur method There is no barrier zone from the 3 types of  VCO. VCO used as a topical is VCO fishing.The results of a test analysis of the results of observations in patients as much as 15 people for 9 days in 3 treatments with chronic wounds obtained p < 0.05 (0.000) which means during the treatment that the wound condition is better. Keyword : Organoleptic, Staphylococcus aureus, Physicochemical, VCO

scholarly journals DEALUMINATION AND CHARACTERIZATION OF ZSM - 5 AS CATALYST FOR GLYCEROL CONVERSION TO GLYCEROL MONOLAURATE

REAKTOR ◽  
2018 ◽  
Vol 18 (2) ◽  
pp. 110 ◽  
Author(s):  
Didi Dwi Anggoro ◽  
Riko Rikardo Putra ◽  
Herawati Oktaviani ◽  
Lutfi Af’idatul Kamilah ◽  
FatmaTsaniya Chamdani
Keyword(s):  
Molecular Weight ◽  
Fatty Acid ◽  
Biodiesel Production ◽  
Optimum Conditions ◽  
Glycerol Conversion ◽  
Catalyst Synthesis ◽  
Naturally Occurring ◽  
Glycerol Monolaurate ◽  
Glycerol Derivative

Glycerol Monolaurate (GML) is a naturally occurring fatty acid widely utilized in food, cosmetics, andhomeopathic supplements. Glycerol is a compound glycerides, a byproduct of biodiesel production from the transesterification process. Glycerol is converted to glycerol derivative product that has more value as Glycerol Monolaurate (GML).GML is a naturally occurring fatty acid widely utilized in food, cosmetics, andhomeopathic supplements.One of the catalyst that had beenused is ZSM-5. Dealumination is used to change the acidity of the zeolite. This study consists of several stages, there are dealumination of zeolite ZSM-5 using H2SO4, drying at 110 ° C for 1 hour, Then calcination at a temperature of 550 ° C for 4 hours. Characterization catalyst to testing the acidity of the catalyst by absorption of ammonia and pyridine. Acidity of Zeolite is expressed in the mmol of ammonia or pyridine per gram of catalyst. Synthesis of monolaurate with dealuminated result are performed by GC-MS analysis, it’s to determine the molecular weight and to show a purity of Glycerol Monolaurate. Testing results obtained in the optimum conditions at dealumination temperature and dealumination time respectively are 40-60 0C and 2-5 hours. The dealumination variables are acid concentration, temperature and time of dealumination affecting ZSM-5 acidity and % yield of GML. The acidity affecting the yield% of Glycerol monolaurate produced Keywords :Glycerol, Glycerol Monolaurate, dealumination, ZSM - 5.

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