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Ultrasonic Bath

Amirtaher Mirmortazavi, Hamidreza Rajati Haghi, Abdolmajid Fata, Hossein Zarrinfar, Hossein Bagheri, Amirhossein Mehranfard
Background and Purpose: Candida -associated denture stomatitis is one of the most common forms of oral candidiasis among denture wearers. Regarding this, the aim of the present study was to evaluate the antifungal effects of home-generated ozonated water on the adhesion of the C.  albicans attached to the surface of the denture base acrylic resins. Materials and Methods: For the purpose of the study, different concentrations of C. albicans were added to the tubes containing acrylic resin blocks, and then incubated for 2 h at 35°C...
June 2018: Advances in Medical Mycology (Iran)
Marta Gładysz, Małgorzata Król, Patryk Własiuk, Michał Piwowar, Grzegorz Zadora, Paweł Kościelniak
In this study, the effective and robust semi-destructive ultrasound assisted extraction (UAE) method followed by gas chromatography coupled to mass spectrometry (GC-MS) method used for analysis of red lipsticks samples was developed, optimized and evaluated. 43 red lipsticks of a very similar hue representing of 21 different manufacturers were investigated. The red lipsticks (approximately 0.05 mg) were applied on a disc (of ø 2 mm) placed on specially designed stand printed with a 3D printer. In order to optimize the main factors affecting extraction process, Doehlert experimental design with response surface methodology was applied...
October 3, 2018: Journal of Chromatography. A
Maria V Chandra-Hioe, Jenny Elvira, Jayashree Arcot
Lutein is a xanthophyll, a bioactive phytochemical that presents itself as colourful pigments in plants. Australian sweet lupin flour has been incorporated as a food ingredient in wheat bread and pasta to improve their sensory property and nutritional quality. However, the amount of lutein in lupin flour has not yet been determined. This is the first study to quantify naturally occurring lutein in Australian sweet lupin flour after the extraction efficiency was optimised. Several organic solvents (acetone, isopropyl alcohol, ethyl acetate and hexane), the use of an ultrasonic bath or a probe, the need for saponification and addition of ascorbic acid (served as antioxidant) were tested to compare the extraction yield...
October 10, 2018: Plant Foods for Human Nutrition
Adriana Fernández Campos, Ricardo J Cassella
The present work reports the development of ion chromatography conductivity based detection analytical method for the determination of some inorganic anions (chloride, sulfate and phosphate) in vegetable oils. The analytes were extracted from samples prior to injection into the chromatographic system, employing a simple two-step procedure. In the first step, 4.5 g of the sample was vigorously mixed with 15 mL of deionized water and then mixed for 15 min on a horizontal roller. Afterwards, the mixture was sonicated for 15 min in an ultrasonic bath...
October 2018: Journal of Food Science and Technology
Nicolas Van Elsué, Cleo L Crunelle, Cor A Verbrugge, Kim van Baarle, Anaïs Rodrigues, Hugo Neels, Michel Yegles
Gamma-hydroxybutyric acid (GHB) is a short-chain fatty acid used recreationally as a drug of abuse due its strong suppressive effect on the central nervous system. The detection window of GHB in blood and urine is very narrow (t1/2=30min) but can be substantially prolonged using alternative matrices such as hair. We here present a newly developed and limited validated method with a solid phase extraction (SPE) using GC-MS/MS to determine concentrations of GHB in hair samples. The soft extraction technique (water and 90min ultrasonic bath) preserves GHB with a high yield and clean extracts...
August 30, 2018: Forensic Science International
Karolina Celejewska, Monika Mieszczakowska-Frąc, Dorota Konopacka, Tomasz Krupa
The aim of the study was to characterize physical and chemical composition of four highbush blueberry cultivars ("Bluecrop," "Late Blue," "Chandler," and "Elliot"). The assessment of ultrasound influence at the osmotic dehydration step and during hybrid drying on mass transfer and the nutritional quality of all cultivars was also done. The experiment consisted of two stages: (1) initial: optimization of osmotic dehydration procedure, (2) the main experiment including all stages of dried blueberry production (pretreatment, osmotic dehydration chosen in the initial stage, and drying)...
September 2018: Journal of Food Science
A I Argüelles-Pesqueira, N M Diéguez-Armenta, A K Bobadilla-Valencia, S K Nataraj, A Rosas-Durazo, R Esquivel, M E Alvarez-Ramos, Roberto Escudero, P Guerrero-German, J A Lucero-Acuña, P Zavala-Rivera
Here we demonstrate a simple method for the organic sonosynthesis of stable Iron Carbide@Iron Oxide core-shell nanoparticles (ICIONPs) stabilized by oleic acid surface modification. This robust synthesis route is based on the sonochemistry reaction of organometallic precursor like Fe(CO)5 in octanol using low intensity ultrasonic bath. As obtained, nanoparticles diameter sizes were measured around 6.38 nm ± 1.34 with a hydrodynamic diameter around 25 nm and an estimated polydispersity of 0.27. Core-Shell structure of nanoparticles was confirmed using HR-TEM and XPS characterization tools in which a core made up of iron carbide (Fe3 C) and a shell of magnetite (γ-Fe2 O3 ) was found...
December 2018: Ultrasonics Sonochemistry
Weixin Ouyang, Longxing Su, Xiaosheng Fang
A facile chemical bath method is adopted to grow bismuth oxychloride (BiOCl) nanosheet arrays on a piece of Cu foil (denoted as BiOCl-Cu) and isolated BiOCl nanosheets are collected by ultrasonication. A self-supporting BiOCl film is obtained by the removal of Cu foil. Photodetectors (PDs) based on these BiOCl materials are assembled and the effects of morphologies and electrode configurations on the photoelectric performance of these PDs are examined. The BiOCl nanosheet PD achieves high responsivities in the spectral range from 250 to 350 nm, while it presents quite a small photocurrent and slow response speed...
September 2018: Small
Jing Su, Tarsila G Castro, Jennifer Noro, Jiajia Fu, Qiang Wang, Carla Silva, Artur Cavaco-Paulo
The laccase polymerization of catechol was performed using different reactors namely a water bath (WB), an ultrasonic bath (US) and a high-pressure homogenizer (HPH). The total content of free OH and the MALDI-TOF spectra of polymers obtained demonstrated that reactions are favored in the presence of high-energy environments. Higher conversion yields and polymerization degrees (DP) were obtained after polymerization using US or HPH. Molecular dynamic simulation studies supported these findings by revealing a more open enzyme active site upon environments with high molecular agitation...
November 2018: Ultrasonics Sonochemistry
Kaiyu Yang, Fushan Li, Yang Liu, Zhongwei Xu, Qianqian Li, Kai Sun, Lichun Qiu, Qunying Zeng, Zhixin Chen, Wei Chen, Wanzhen Lin, Hailong Hu, Tailiang Guo
Perovskite quantum dots (PeQDs) have emerged as a new kind of nanomaterial in various applications, especially light-emitting diodes (LEDs). However, the synthesis of PeQDs is relatively complicated and the electron transport layer (ETL) is usually fabricated in a vacuum because of the dissolution of PeQDs films in organic solvents, which will increase the difficulty and cost in mass production. Here, a simple one-step "ultrasonic bath" treatment to synthesis PeQDs is adopted and applied into the PeQDs-LEDs...
August 15, 2018: ACS Applied Materials & Interfaces
José Pedro Etchepare Cassol, Fábio de Souza Barbosa, Cássia V Garcia, Andreas S L Mendez
The antipsychotic paliperidone was investigated with a focus on stability, degradation impurities and kinetics reaction profile. Osmotic tablets 3 mg (OROS® ) were subjected to extraction in an ultrasonic bath and the resulting acidic solution was stressed by forced conditions. Degraded samples were monitored by HPLC-DAD in different storage times for acidic and alkaline hydrolysis, oxidation, heat and photolysis. Photolysis was shown to be a strong degradation factor, with a drug content of 24.64% remaining after 24 h...
November 2018: Biomedical Chromatography: BMC
Li-Ming Qin, Xin-An Yang, Di Leng, Wang-Bing Zhang
A sample treatment technique based on a duel frequency ultrasonic device for enzymatic digestion of rice is reported. The ultrasonic device combines a high intensity ultrasonic probe and the temperature control function of ultrasonic water bath, which can effectively extract cadmium from rice within only 160 s under the optimized conditions. Compared with the traditional ultrasonic assisted enzymatic digestion, the new method not only shortens the time significantly (e.g., from the 90 min of ultrasonic water bath to the present few minutes), but also increases the extraction efficiency of cadmium (such as ~ 75% from ultrasonic probe to app...
October 1, 2018: Talanta
F G M Medeiros, R T P Correia, S Dupont, L Beney, M R S Pedrini
Cell osmoporation is a simple and straightforward procedure of creating food-grade biocapsules. This study proposes a new protocol of sequential cell osmoporation stages and evaluates its impact on the efficiency of curcumin and fisetin internalization into Saccharomyces cerevisiae cells. To the best of our knowledge, this is the first report in the literature regarding the subject. To assess how multiple osmoporation stages influence the encapsulation efficiency (% EE), encapsulated amount of curcumin (IC) and fisetin (IF) into S...
October 2018: Letters in Applied Microbiology
Xinyu Zhou, Yiyong Wang, Zhipeng Liang, Hui Jin
Ni⁻Co alloy and Ni⁻Co⁻Y₂O₃ multiple coatings refined with nano-Y₂O₃ particles were fabricated by ultrasonic-assisted electrochemical deposition in an acid sulfamate bath. Linear sweep voltammetry (LSV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS) techniques were applied to investigate the nucleation/growth process of composite coatings in co-deposition. The LSV results indicated that the incorporation of nano-Y₂O₃ particles with the Ni⁻Co matrix shifted the initial deposition potential to a more positive potential and decreased cathodic polarization...
July 1, 2018: Materials
Hui Wang, Penny Tan, David Barona, Grace Li, Susan Hoe, David Lechuga-Ballesteros, David S Nobes, Reinhard Vehring
A new shadowgraphic imaging method and an associated instrument for analyzing the physical stability of pharmaceutical suspensions are introduced in this paper. The new suspension tester consists mainly of a high-resolution camera that takes sequential shadowgraphic images of emulsions or suspensions and a 2D collimated LED for simultaneous whole-sample illumination in bright field. A built-in ultrasonic bath provides controlled initial agitation to the samples of interest. Sequential images acquired by the experimental setup were used to derive normalized transmission profiles from which an instability index was developed for quantitative stability comparison between samples...
September 5, 2018: International Journal of Pharmaceutics
Lyes Rabhi, Abdelkader Lemou, Angelo Cecinato, Catia Balducci, Nabila Cherifi, Riad Ladji, Noureddine Yassaa
Chemicals such as polycyclic aromatic hydrocarbons (PAHs), phthalateesters, parabens, siloxanes and squalene, all of them classified as endocrine-disrupting chemicals (EDCs), have been reported to occur in all environmental compartments. The effects of EDCs on development, reproduction, growth, metabolism and obesity constitute a real public health issue. A list of EDCs (> 40 compounds) were characterised in total suspended particulates (outdoor soot: 92 samples) collected in July-September 2016 in an Algiers urban area; besides, settled indoor dusts (36 samples) were collected between November and December 2016 in schools, homes, manufacture and hospital of the same province...
August 2018: Environmental Science and Pollution Research International
Mehmet Fatih Cengiz, Mehmet Başlar, Onur Basançelebi, Mahmut Kılıçlı
In this study, effects of low intensity electrical current (EC) and ultrasound (US) treatments on the reduction of some important pesticides (captan, thiamethoxam and metalaxyl) residues in tomato samples were investigated. Three different currents (200, 800 and 1400mA) of EC were applied at various time intervals (2, 4, 6, 8 and 10min). Two kinds of US treatments including ultrasonic bath (UB) at 40kHz and ultrasonic probe (UP) at 24kHz were tested for the determination of US effectiveness. In addition, synergistic effects of US on EC treatments were evaluated...
November 30, 2018: Food Chemistry
Yawei Feng, Hao Li, Lili Ling, Sa Yan, Donglai Pan, Hao Ge, Hexing Li, Zhenfeng Bian
The introduction of a piezoelectric field has been proven a promising method to enhance photocatalytic activity by preventing photoelectron-hole recombination. However, the formation of a piezoelectric field requires additional mechanical force or high-frequency ultrasonic baths, which limits its potential application on industrial scale. Therefore, it is of great practical significance to design the catalyst that can harvest the discrete energy such as the fluid mechanical energy to form the electric field...
July 17, 2018: Environmental Science & Technology
Rehmat Zaman, Ghazanfar Ali, Zeeshan Anjum, Muhammad Sajid, Muhammad Mumtaz Khan, Aziz Ahmad, Syed Rizwan Abbas, Wajid Rehman
The presence of P-glycoprotein in the human intestine represents a significant barrier to effective drug therapy. These proteins form a multidrug-resistant barrier to most drugs, especially those administered orally. Thus, strategies are needed to prepare molecules to combat these resistant proteins and enable an increase in drug efficacy. We developed a novel tin-Schiff base complex using an ultrasonic bath, a new technique in small molecule synthesis. New bond formation was confirmed using ultraviolet and Fourier transform spectroscopies...
May 2018: Assay and Drug Development Technologies
Carlos González, Leopoldo Forner, Carmen Llena, Adrián Lozano
Background: Chlorhexidine is an irrigant solution widely used in root canal treatment because of its good antimicrobial properties. However, its mixture with sodium hypochlorite results in the appearance of substance called p-chloroaniline, a cytotoxic substance. This is also found when chlorhexidine is heated. The use of passive ultrasonic irrigation is related to an irrigant thermal increase, which can cause the appearance of p-chloroaniline. Thus, the objective is to establish the influence of ultrasonic and sonic activation, with the use of different intensities, upon the temperature of chlorhexidine gluconate (CHX)...
May 2018: Journal of Clinical and Experimental Dentistry
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