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ultrasonictreatment, etc ; liquids; nanobubbles; pH; physics; surfactants; Show all 6 Subjects
Abstract:
... The decreasing size of minerals that need to be separated with flotation technique has posed a rigorous challenge to conventional flotation techniques. It's urgent for the researchers working in the field of minerals processing to develop a kind of new, efficient but economic flotation technique. In the past dozens of years, a mass of reports regarding the application of bulk nanobubbles in flotat ...
ultrasonictreatment, etc ; beef; food research; industry; microstructure; muscles; Show all 6 Subjects
Abstract:
... This study aimed to evaluate the effects of ultrasonic-assisted thawing at different frequency modes (mono-, dual- and tri-frequency) on the thawing efficiency and quality evaluation of frozen beef. The thawing time, muscle quality, and microstructure of frozen beef were studied. The results showed that ultrasonic-assisted thawing effectively reduced the thawing time by 15.7–45.4% compared with fl ...
ultrasonictreatment, etc ; electrochemistry; electrodes; graphene; liquids; pH; porous media; Show all 7 Subjects
Abstract:
... Parabens are chemicals widely used as preservatives in different types of industrial products. In recent years, the concern about the safety of these compounds has increased due to their endocrine disrupting activity. For this reason, their use is highly regulated and even some of them have already been banned. Thus, methods for the sensitive and selective detection of these compounds are required ...
ultrasonictreatment, etc ; Ziziphus; food chemistry; microwave treatment; rutin; solvents; Show all 6 Subjects
Abstract:
... The present study investigated the effects of different extraction methods including water-water bath (W-WB), ethanol-water bath (E-WB), deep eutectic solvent (DES) combined with ultrasound-assisted extraction (DES-UAE), microwave-assisted extraction (DES-MAE), and enzyme-assisted extraction (DES-EAE) on flavonoids (total flavonoid content, flavonoid composition, and stability) in jujube. The high ...
ultrasonictreatment, etc ; hydroxyl radicals; magnetism; pollution control; singlet oxygen; Show all 5 Subjects
Abstract:
... Magnetic stir bars are routinely used by most of researchers in the fields of chemistry, biology and environment etc. An incredible phenomenon, in which the magnetic stirring increased reaction rate by tens of times under ultrasound irradiation, impelled us to explore roles of magnetic stirring. Unexpectedly, the thimbleful nano PTFE particles, from shell of magnetic stir bar, were exfoliated duri ...
ultrasonictreatment, etc ; Capsicum annuum; capsaicin; choline; microwave treatment; solvents; vegetables; Show all 7 Subjects
Abstract:
... Methods exist to extract capsaicin from chili (Capsicum annuum L.), but they have poor yield and are hazardous to the environment. The objective of the study was to develop a process for extraction of capsaicin from chili that is more efficient and bio-rationale. Two deep eutectic solvents (DES), choline chloride-urea (CCU) and choline chloride-glycerol (CCG), were used for extraction with MAE (mi ...
ultrasonictreatment, etc ; antioxidant activity; ethanol; liquids; nanofiltration; passion fruits; polyamides; Show all 7 Subjects
Abstract:
... Ultrasound-Assisted Pressurized Liquid Extraction (UAPLE) and Nanofiltration (NF) were performed in 70% ethanol to recover and concentrate bioactive compounds from passion fruit rinds. Polyamide Thin-Film Composite membranes with nominal MWCO between 150 and 300 Da provided good retention of phenolic compounds (74–89%) and antioxidant capacity (84–96%) with a maximum mass concentration factor 1.4. ...
ultrasonictreatment, etc ; acoustics; biocompatible materials; biopolymers; cellulose; energy; hydrogels; ultrasonics; Show all 8 Subjects
Abstract:
... As the most abundant natural polymer on the pl anet, cellulose has a wide range of applications in the biomedical field. Cellulose-based hydrogels further expand the applications of this class of biomaterials. However, a number of publications and technical reports are mainly about traditional preparation methods. Sonochemistry offers a simple and green route to material synthesis with the biomedi ...
ultrasonictreatment, etc ; Paulownia; absorbance; absorption; heartwood; permeability; porosity; tyloses; ultrasonics; wood; Show all 10 Subjects
Abstract:
... This study investigated the effects of ultrasonic treatment on the pore structure of the Korean paulownia (Paulownia coreana). Cylindrical samples (10 mm thickness and 29 mm in diameter) were taken from heartwood in longitudinal direction and divided into two groups; Group (A) consisted of samples with 2 to 3 annual rings, while the samples of Group (B) had 5 to 6 annual rings. Changes in pore str ...
ultrasonictreatment, etc ; ammonium perchlorate; energy; heat; pollution; polyurethanes; probability; thermal degradation; Show all 8 Subjects
Abstract:
... Solid propellants with high safety, excellent thermal decomposition, and green performance are hot and difficult research areas in aerospace. In this paper, AP@HNS (hexanitrostilbene) composites with core–shell structure were designed and prepared by an ultrasound-assisted method using polyurethane for the interfacial modification of ammonium perchlorate (AP). The results show that the AP@HNS comp ...
ultrasonictreatment, etc ; adhesion; energy conservation; hydrophobicity; process design; synergism; temperature; ultrasonics; Show all 8 Subjects
Abstract:
... To meet the urgent demand for antiscaling technology, a superhydrophobic surface coupled with ultrasonic technology is proposed to develop an environmentally friendly, energy-saving, and high-efficiency antiscaling technology. Six types of superhydrophobic coatings are prepared on the metal surface by the spray adhesion method, and their antiscaling performance is carefully investigated. The resul ...
ultrasonictreatment, etc ; Uncaria gambir; antimicrobial properties; biocomposites; cellulose; tensile strength; ultrasonics; Show all 7 Subjects
Abstract:
... This work characterized bacterial cellulose (BC)/Uncaria gambir (G) biocomposite film prepared with ultrasonication treatment. Films were prepared from BC powder suspensions in distilled water without and with various loadings (0.05 g, 0.1 g, 0.2 g, 2 g) of G powder then treated using an ultrasonic probe at 1000 W for one hour. The results revealed that the ultrasonication treatment of the suspens ...
ultrasonictreatment, etc ; Russia; Synechocystis; biosynthesis; cell death; freshwater; stress tolerance; ultrasonics; Show all 8 Subjects
Abstract:
... The data of laboratory studies on the effect of low-intensity ultrasound on the toxigenic cyanobacteria Synechocystis sp., the species dominant in the North-West of Russia, cause “blooming” of drinking water sources and pose a danger to the health of the population of cities and rural areas. The study revealed that ultrasonic irradiation is stressful for cyanobacteria. It has been found for the fi ...
ultrasonictreatment, etc ; Lignosus rhinocerotis; hydrophobicity; loss modulus; polysaccharides; storage modulus; ultrasonics; Show all 7 Subjects
Abstract:
... Ultrasound is increasingly applied to modify the structures and physicochemical properties of polysaccharides. Hence, this work investigated the ultrasound-induced changes in the rheological behavior and hydrophobic microdomains of Lignosus rhinocerotis polysaccharide (LRP). With an increase in ultrasonic time, the apparent viscosity, storage modulus, loss modulus, and the final percentage recover ...
ultrasonictreatment, etc ; acetic acid; experimental design; pepper; solvents; sweet peppers; toxicity; Show all 7 Subjects
Abstract:
... The influence of extraction parameters on the ultrasonically assisted extraction (UAE) of K, Na, Ca, Mg, Zn, Cu, Fe, Mn, Cr, Se, Mo, Li, Al, B, Pb, Hg, Cd, As, and Ni was studied to determine the conditions when a minimum of essential and maximum of toxic elements is leached from peppers, depending on its ripening stage. The effect of process variables was investigated by using Box–Behnken design. ...
ultrasonictreatment, etc ; Haematococcus; cell division; chlorophyll; nitrogen; sonication; transmission electron microscopy; ultrasonics; Show all 8 Subjects
Abstract:
... In this study, ultrasonication at a frequency of 40 kHz was used to shorten the sonication period and enhance the growth of Haematococcus lacustris. To confirm the optimal conditions, the effects of ultrasound output and treatment interval were examined. Under optimal conditions (20 W and 15-day cycle), the maximum cell density and chlorophyll content were 66.75 × 10⁴ cells mL–¹ and 36.54 mg g–¹, ...
ultrasonictreatment, etc ; durability; electronics; graphene oxide; hydrophobicity; nanofibers; polyurethanes; surface roughness; temperature; Show all 9 Subjects
Abstract:
... Conductive polymer nanofiber composites (CPNCs) based wearable sensing electronics have aroused great attention of scientists in recent years. However, it is still difficult to obtain CPNCs with good water proof, excellent durability, and multiple sensing performance. Herein, we develop a multifunctional CPNC with a wrinkled reduced graphene oxide (RGO) shell and polymer nanofiber core, which is p ...
ultrasonictreatment, etc ; absorptivity; anthocyanins; food composition; fruits; liquid chromatography; nutrient databanks; vegetables; Show all 8 Subjects
Abstract:
... It is well known that changes in the anthocyanin content occur during fruit/vegetable development. However, the anthocyanin content variation due to various analytical methods has not been established in the literature. Therefore, in this study, the individual and the total anthocyanin content of the 64 Australian foods have been determined using liquid chromatography (LC-MS, LC-UV) and spectropho ...
ultrasonictreatment, etc ; biodiesel; catalysts; diesel fuel; economic analysis; feedstocks; methanol; pollution; ultrasonics; Show all 9 Subjects
Abstract:
... The pollution problems and limited availability of diesel fuel urge the world to substitute it with clean biodiesel. The biggest obstacle to use biodiesel as a fuel is its high price. Using waste feedstock, cheap catalysts, and advanced production techniques can decrease the biodiesel price to be reasonable. This research can be divided into a technical part and an economic part. The technical one ...
ultrasonictreatment, etc ; acetone; biodiesel; biomass; chloroform; hexane; methanol; microalgae; oxidative stability; temperature; Show all 10 Subjects
Abstract:
... This study reports the effects of polar (acetone/methanol) and non-polar (chloroform/hexane) solvents on lipid yield, fatty acids methyl esters (FAMEs) composition, and biodiesel properties of microalgae. The lipids yield extracted by hexane and chloroform (100.01 and 94.33 mg/g) were higher than by methanol and acetone (40.12 and 86.91 mg/g). The polarity of solvents also affected FAMEs compositi ...