5,758 research outputs found

    Penurunan sensitivitas rasa manis akibat pemakaian pasta gigi yang mengandung Sodium Lauryl Sulphate 5%

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    Background: Sodium Lauryl Sulphate (SLS) is an anionic surfactant, a sudser that is added to toothpaste to create the froth that toothpaste becomes after you begin brushing by lowering the surface tension of the saliva in your mouth and allowing bubbles to form. The presence of this item sometimes make food taste worst after using the toothpaste. Sodium Lauryl Sulphate denaturates polypeptides of protein molecules of taste buds and saliva causing the different of taste sensation. Purpose: To prove the hypothesis that by using toothpaste containing Sodium Lauryl Sulphate 5% will decrease the sweet taste sensitivity. Methods: Subject will be tested their sweet taste thresholds by dropping sucrose at the anterior of the tongue from 0,01M until subject sense the sweet sensation. Then, subject is asked to brush their teeth using the toothpaste containing SLS or non SLS. After brushing, subject will be tested same as before brushing teeth to see any difference changes of taste thresholds. The result then being analyzed using Wilcoxon Signed Ranks Test to show any significant results. Result: The SLS group shows a significant differences with p = 0,011 (p 0,05). Conclusion: Sodium Lauryl Sulphate decreased the sweet taste sensitivit

    Photodesorption of specific organic compounds from titanium dioxide particles in aqueous media

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    This study investigates the photodesorption of organic compounds (beef extract, peptone, humic acid, tannic acid, sodium lignin sulphonate, sodium lauryl sulphate, arabic gum powder and arabic acid) from TiO2 (1 g/L in water, pH 7). After a period to reach adsorption equilibrium, photodesorption experiments were conducted in a recirculated reactor at a constant flow rate of 150 mL/min with a UV light intensity of 24 W. Photodesorption was observed only for sodium lauryl sulphate (50%), sodium lignin sulphonate (43.47%), beef extract (20.35%) and tannic acid (10.5%) indicating that photodesorption is specific to some organic compounds but not to all. Using liquid chromatography-organic carbon detection, untreated beef extract and sodium lignin sulphonate were found to contain significant amounts of humic substances (∼1,000 g/mol), which decreased in concentration after dark phase adsorption, while a significant increase in low molecular weight (<350 g/mol) concentrations was observed after photodesorption. UV-treated sodium lauryl sulphate photodesorbed to give both higher molecular weight (HMW) and lower molecular weight (LMW) organics. Thus, the HMW fractions of organic compounds decomposed into smaller compounds after UV irradiation, which subsequently desorbed from TiO2 surface. However, untreated tannic acid contained a larger proportion of LMW acids, which shows a high adsorption affinity to TiO2 during adsorption and poorly desorbs upon irradiation. © 2013 © 2013 Balaban Desalination Publications. All rights reserved

    Pillarization of Sumatera Bentonite by Sodium-assisted As Effective Adsorbent of Anionic Surfactants Sodium Lauryl Sulphate (SLS) Waste

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    In this work, the Sumatera bentonite was sodium-pillarized in a new low-temperature and restricted time preparation route and then applied in anionic surfactant sodium lauryl sulphate removal. Structure characterization used Fourier Transform Infra Red (FT-IR), Scanning Electron Microscope - Energy Dispersive X-ray (SEM-EDX), X-ray Diffraction (XRD), and Brunauer–Emmett–Teller (BET) analysis. A strong peak at 22° and 35.66° in XRD analysis was detected as Sodium-pillar that increased crystallinity, then the functional changes of dehydration in lattice structure were detected in 1013 cm−1 by FTIR analysis. The morphology and compositional transformation were analyzed by SEM-EDX and BET analysis, denoted by increasing particle shape and sodium intercalant composition homogeneity. Moreover, the surface area increased from 61.791 to 66.086 m2/g. The sodium lauryl sulphate adsorption by bentonite-Na reached maximum capacity at 8.403 mg/g, which is higher than the pristine bentonite (5.747 mg/g) under the optimum condition. The adsorption mechanism is feasible, endothermic, and conformed to the pseudo-second-order and Freundlich adsorption model. The new route proposed for sodium intercalation effectively improves the Sumatera bentonite adsorption ability to remove sodium lauryl sulphate waste. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

    The Prevalence of Antibiotic and Toothpaste Sensitivity Found in Oral Streptococcal Isolates in Healthy Individuals in the Okada Community of Nigeria

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    Background: This study aimed to determine the prevalence, antibiotic, and toothpaste sensitivity of oral streptococcal isolates in healthy individuals in the Okada community of Nigeria. Methods: Oral samples were collected from 230 volunteers and were subjected to standard microbiological tests. Antibacterial sensitivity tests were carried out on the streptococcal isolates that were obtained using a disk diffusion technique, and eight kinds of toothpaste (A-H) were screened for their antibacterial effects on Streptococcus mutans (S. mutans). Results: The prevalence of oral streptococci found in this study was 26.1% and the predominant species was S. salivarius (13.9%). S. salivarius was highly resistant to cloxacillin (100%) and Augmentin (96.9%), whilst resistance to gentamicin and erythromycin was low at 21.9% and 3.1% respectively. S. mutans were completely sensitive to gentamicin whilst resistance to erythromycin was 33.3%. The entire Streptococcus species showed the lowest resistance to erythromycin (20.0%), followed by gentamicin (31.7%). At 100 mg/mL all toothpaste samples had antibacterial effects on S. mutans. At 50 mg/mL all samples except toothpastes G and H inhibited the bacterium. Toothpastes A and E had the lowest minimum inhibitory concentration of 25 mg/mL. Conclusions: Toothpastes A and E were the most effective toothpastes of the eight assessed in this study

    The Incompatibility of Certain Alcohol and Soap Frothers

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    The purpose of this thesis is to elucidate this phenomena of frother incompatibility, and to offer an explanation based upon several divergent lines of investigation. The research was limited to four common frothing agents, namely, pine oil, n-amyl alcohol, sodium oleate, and sodium lauryl sulphate (Dreft)

    A New Spectrophotometric Method for the Determination of Itraconazole Based on the Oxidation Reaction

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    The solubility of Itraconazole (Itcz) in various solvents such as distilled water, hydrochloric acid and sulphuric acid in presence of cationic and anionic surfactant i.e. cetyl trimethyl ammonium bromide (CTAB) and sodium lauryl sulphate (SLS) was examined. It has been found that SLS greatly enhanced the solubility of Itraconazole by 13 fold. A simple spectrophotometric method has been proposed for the determination of Itraconazole in pure and pharmaceutical formulation by ammonium metavanadate in presence of SLS. The method is based on the formation of wine red colored species on treating Itcz with ammonium metavanadate at CMC of SLS i.e. 0.0008M. The wine red species (due to reduced V(v)) exhibiting maximum absorbance at 385 nm. Keywords: Itraconazole, sodium lauryl sulphate, solubilit

    An approach for prioritizing “down-the-drain” chemicals used in the household

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    This article has been made available through the Brunel Open Access Publishing Fund.Many chemicals are present in cleaning and personal care products, which after use are washed down the drain and find their way into water bodies, where they may impact the environment. This study surveyed individuals to determine what products were used most in the home, in an attempt to prioritize which compounds may be of most concern. The survey resulted in the identification of 14 categories of products consisting of 315 specific brands. The survey estimated that individuals each discharge almost 33 L of products per year down the drain. Dishwashing liquids and hand wash gels, which accounted for 40% of this volume, were selected for identification of specific ingredients. Ingredients were classified as surfactants, preservatives, fragrances or miscellaneous, with hand wash gels having a wider range of ingredients than dishwashing liquids. A review of the literature suggested that preservatives, which are designed to be toxic, and fragrances, where data on toxicity are limited, should be prioritized. The approach undertaken has successfully estimated use and provisionally identified some classes of chemicals which may be of most concern when used in cleaning and personal care products

    Assessing the sensitivity of two TEWL measuring methods: open vs. closed chamber

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    Transepidermal water loss (TEWL) is a key parameter in the assessment of skin barrier impairment and recovery. The aim of this study was to perform a comparative assessment of the two types of TEWL instruments, with specific emphasis on their sensitivity in detecting small differences. An open chamber (Tewameter TM300, Courage & Khazaka, Germany) and a closed, condenser-chamber instrument (AquaFlux AF200, Biox Systems, UK) were used in the study. A complimentary skin hydration test (Corneometer CM825, Courage & Khazaka, Germany) was also carried out. In the first study, the closed chamber results have revealed two additional sets of significantly different data, in comparison to the open chamber method. In the second study, where the level of barrier impairment was higher, both methods have resulted in the same statistical outcome. It was concluded that the condenser-chamber instrument possesses higher sensitivity than the open chamber when assessing small differences in TEWL, under the same experimental conditions

    Sodium lauryl sulphate/ultrasound combination for transcutaneous vaccine delivery: effect of changing sodium lauryl sulphate concentration on antigen permeation, cavitation and skin damage

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    Low frequency ultrasound in combination with Sodium Lauryl Sulphate (SLS), a known transdermal chemical enhancer has been found to enhance delivery of molecules through the skin. In this abstract, we report the effects of changing SLS concentration on cavitation, protein permeation through the skin and skin damage
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