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Ultrasonic Bath

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https://www.readbyqxmd.com/read/30091523/uv-photodetectors-based-on-biocl-nanosheet-arrays-the-effects-of-morphologies-and-electrode-configurations
#1
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...
August 9, 2018: Small
https://www.readbyqxmd.com/read/30080551/the-effect-of-high-energy-environments-on-the-structure-of-laccase-polymerized-poly-catechol
#2
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
https://www.readbyqxmd.com/read/30058319/all-solution-processed-perovskite-quantum-dots-light-emitting-diodes-based-on-the-solvent-engineering-strategy
#3
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
https://www.readbyqxmd.com/read/30047558/stability-degradation-impurities-and-decomposition-kinetics-for-paliperidone-from-osmotic-tablets
#4
José Pedro Etchepare Cassol, Fábio de Souza Barbosa, Cássia V Garcia, Andreas S L Mendez
The antipsychotic paliperidone was investigated with focus on stability, degradation impurities and kinetics reaction profile. Osmotic tablets 3 mg (OROS®) were submitted to extraction in ultrasonic bath and the resulting acidic solution was stressed by forced conditions. Degraded samples were monitored by HPLC-DAD in different storage time for acidic and alkaline hydrolysis, oxidation, heat and photolysis. Photolysis showed to be a strong degradation factor, expressing a drug remaining content of 24.64% after 24h...
July 26, 2018: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/30029381/dual-frequency-ultrasound-assisted-enzyme-digestion-coupled-with-atomic-fluorescence-spectrometry-as-a-green-and-efficient-tool-for-cadmium-detection-in-rice-flour-samples
#5
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
https://www.readbyqxmd.com/read/29978596/curcumin-and-fisetin-internalization-into-saccharomyces-cerevisiae-cells-via-osmoporation-impact-of-multiple-osmotic-treatments-on-the-process-efficiency
#6
Fábio Gonçalves Macêdo de Medeiros, Roberta Targino Pinto Correia, Sébastien Dupont, Laurent Beney, Márcia Regina da Silva Pedrini
Cell osmoporation is a simple and straightforward procedure of creating food-grade bio-capsules. 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. In order to assess how multiple osmoporation stages influence the encapsulation efficiency (% EE), encapsulated amount of curcumin (IC) and fisetin (IF) into S...
July 6, 2018: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/29966394/electrochemical-deposition-and-nucleation-growth-mechanism-of-ni%C3%A2-co%C3%A2-y%C3%A2-o%C3%A2-multiple-coatings
#7
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
https://www.readbyqxmd.com/read/29959088/characterization-of-the-suspension-stability-of-pharmaceuticals-using-a-shadowgraphic-imaging-method
#8
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...
June 26, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29948708/polycyclic-aromatic-hydrocarbons-phthalates-parabens-and-other-environmental-contaminants-in-dust-and-suspended-particulates-of-algiers-algeria
#9
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...
June 13, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29934190/reduction-of-pesticide-residues-from-tomatoes-by-low-intensity-electrical-current-and-ultrasound-applications
#10
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
https://www.readbyqxmd.com/read/29925233/enhanced-photocatalytic-degradation-performance-by-fluid-induced-piezoelectric-field
#11
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
https://www.readbyqxmd.com/read/29878843/discovery-of-a-tin-piperonal-entecavir-schiff-base-compound-that-overcomes-multidrug-resistance-by-inhibiting-p-glycoprotein
#12
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
https://www.readbyqxmd.com/read/29849970/temperature-changes-in-2-chlorhexidine-gluconate-using-two-activation-methods-with-different-intensity-levels
#13
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
https://www.readbyqxmd.com/read/29747451/optimization-of-synthesis-conditions-of-carbon-nanotubes-via-ultrasonic-assisted-floating-catalyst-deposition-using-response-surface-methodology
#14
Narges Mohammadian, Seyyed M Ghoreishi, Samira Hafeziyeh, Samrand Saeidi, Dionysios D Dionysiou
The growing use of carbon nanotubes (CNTs) in a plethora of applications has provided to us a motivation to investigate CNT synthesis by new methods. In this study, ultrasonic-assisted chemical vapor deposition (CVD) method was employed to synthesize CNTs. The difficulty of controlling the size of clusters and achieving uniform distribution—the major problem in previous methods—was solved by using ultrasonic bath and dissolving ferrocene in xylene outside the reactor. The operating conditions were optimized using a rotatable central composite design (CCD), which helped optimize the operating conditions of the method...
May 9, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29723333/influence-of-ethanol-on-dentin-roughness-surface-free-energy-and-interaction-between-ah-plus-and-root-dentin
#15
Carlos Augusto de Morais Souto Pantoja, Diogo Henrique da Silva, Adriana de Jesus Soares, Caio Cezar Randi Ferraz, Brenda Paula Figueiredo de Almeida Gomes, Alexandre Augusto Zaia, José Flávio Affonso de Almeida
This study aimed to evaluate the influence of different ethanol concentrations on dentin roughness, surface free energy, and contact angle between AH Plus and the root canal dentin. One hundred human maxillary anterior teeth were split longitudinally and 200 dentin specimens were polished to make the surface flatter and smoother. An acrylic bar was positioned between two dentin specimens and impression material was added to create a block, simulating an instrumented root canal space. Specimens were removed from the mold and cleaned in an ultrasonic bath for 10 min...
2018: Brazilian Oral Research
https://www.readbyqxmd.com/read/29705327/numerical-modelling-of-acoustic-pressure-fields-to-optimize-the-ultrasonic-cleaning-technique-for-cylinders
#16
Habiba Lais, Premesh S Lowe, Tat-Hean Gan, Luiz C Wrobel
Fouling build up is a well-known problem in the offshore industry. Accumulation of fouling occurs in different structures, e.g. offshore pipes, ship hulls, floating production platforms. The type of fouling that accumulates is dependent on environmental conditions surrounding the structure itself. Current methods deployed for fouling removal span across hydraulic, chemical and manual, all sharing the common disadvantage of necessitating halting production for the cleaning process to commence. Conventionally, ultrasound is used in ultrasonic baths to clean a submerged component by the generation and implosion of cavitation bubbles on the fouled surface; this method is particularly used in Reverse Osmosis applications...
July 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29681423/ultrasonic-cavitation-enabled-treatment-for-therapy-of-hypertrophic-cardiomyopathy-proof-of-principle
#17
Douglas L Miller, Xiaofang Lu, Chunyan Dou, Yiying I Zhu, Rachael Fuller, Kristina Fields, Mario L Fabiilli, Gabe E Owens, David Gordon, Oliver D Kripfgans
Ultrasound myocardial cavitation-enabled treatment was applied to the SS-16BN rat model of hypertrophic cardiomyopathy for proof of the principle underlying myocardial reduction therapy. A focused ultrasound transducer was targeted using 10-MHz imaging (10 S, GE Vivid 7) to the left ventricular wall of anesthetized rats in a warmed water bath. Pulse bursts of 4-MPa peak rarefactional pressure amplitude were intermittently triggered 1:8 heartbeats during a 10-min infusion of a microbubble suspension. Methylprednisolone was given to reduce initial inflammation, and Losartan was given to reduce fibrosis in the healing tissue...
July 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29674825/influence-of-different-resin-cements-and-surface-treatments-on-microshear-bond-strength-of-zirconia-based-ceramics
#18
Anderson Petrauskas, Karina Andrea Novaes Olivieri, Yasmine Mendes Pupo, Guilherme Berger, Ederson Áureo Gonçalves Betiol
Aim: This study aims to evaluate the microshear bond strength of zirconia-based ceramics with different resin cement systems and surface treatments. Materials and Methods: Forty blocks of zirconia-based ceramic were prepared and embedded in polyvinyl chloride (PVC) tubes with acrylic resin. After polishing, the samples were washed in an ultrasonic bath and dried in an oven for 10 min. Half of the samples were subjected to sandblasting with aluminum oxide. Blocks were divided into four groups ( n = 10) in which two resin cements were used as follows: (1) RelyX™ U100 with surface-polished zirconia; (2) RelyX™ U100 with surface-blasted zirconia; (3) Multilink with surface-polished zirconia; and 4) Multilink with surface-blasted zirconia...
March 2018: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29571482/a-new-method-of-ua_cpe-coupled-with-spectrophotometry-for-the-faster-and-cost-effective-detection-of-proline-in-fruit-juice-honey-and-wine
#19
Semahat Dağdeviren, Nail Altunay, Yasin Sayman, Ramazan Gürkan
The study developed a new method for proline detection in honey, wine and fruit juice using ultrasound assisted-cloud point extraction (UA-CPE) and spectrophotometry. Initially, a quaternary complex was built, containing proline, histamine, Cu(II), and fluorescein at pH 5.5. Samples were treated with ethanol-water mixture before extraction and preconcentration, using an ultrasonic bath for 10 min at 40 °C (40 kHz, 300 W). After the optimization of variables affecting extraction efficiency, good linearity was obtained between 15 and 600 µg L-1 with sensitivity enhancement factor of 105...
July 30, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29565701/assessment-of-pregabalin-use-by-hair-testing
#20
Pascal Kintz, Alice Ameline, Jean-Sébastien Raul
BACKGROUND: The detection and analysis of drugs in hair has progressively emerged as a consequence of the enhanced sensitivity of analytical techniques used in forensic toxicology; a greater advantage in using this matrix respect to classical ones (i.e., urine and blood) is an easier and noninvasive sample collection, even when the careful supervision of law-enforcement officers is required to avoid the risk that the sample may be adulterated or replaced. Moreover, according to the length of the hair, the history of drug exposure can be retrospectively monitored from few weeks up to months or years since sample collection...
October 15, 2018: Substance Use & Misuse
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