نتایج جستجو برای: ultrasonic bath
تعداد نتایج: 44783 فیلتر نتایج به سال:
Abstract As lightweight and comfortable wool products have become the mainstream of market, surface treatment technology fiber has been widely observed. Here, we treated fibers by ultrasonic bath oxidation in a composite method that was better able to improve wetting properties fiber. Using this approach, investigated main factors influencing effect established regression equations multiple ind...
This study evaluated temperature changes during passive ultrasonic irrigation. Root canals of three extracted maxillary canines were enlarged to size #45. Thermocouples were mounted 3, 6, and 9 mm from the apical foramen. Teeth were placed in a water bath at 37 degrees C. Distilled water (20 degrees C) was continuously delivered through an ultrasonic unit (group 1) or deposited into the root ca...
Abstract Ultrasonic-assisted extraction (UAE) is increasingly emerging as a highly effective technique. This technique affected by several experimental factors. The present work aimed to optimize the ultrasonic-assisted of antioxidants from Ulva lactuca (sea lettuce), widespread macroalgae growing along Mediterranean coast. In this respect, full-factorial design (2 3 ) was employed assess effec...
background & aim: medicinal plants are most valuable and useful sources as productive factors of drugs. production and extraction of secondary metabolites have a huge economical importance in recent years. carvone is a compound in bunium persicum fruit and shoot and, it is one of the wide range varieties of valuable and useful secondary metabolites. due to limited crop production, using app...
Ultrasonic pretreatment of cowpea bean pod biomass with addition tripotassium phosphate (K3PO4) was used to induce the production bio-oil enriched in phenolic compounds. An ultrasound bath operating at 40 kHz, 154 W power, and constant biomass:K3PO4 ratio 5:1 (m/m) for pretreatments different durations: 0.5, 1.5, 3, 6, 8, 12 h. After pretreatment, pyrolyzed a fixed bed reactor 600 °C, under flo...
This study is the first to report the use of response surface methodology to improve phenolic yield and antioxidant activity of Acer truncatum leaves extracts (ATLs) obtained by ultrasonic-assisted extraction. The phenolic composition in ATLs extracted under the optimized conditions were characterized by UPLC-QTOF-MS/MS. Solvent and extraction time were selected based on preliminary experiments...
The sonochemical decolorization and degradation of azo dye Methyl violet using Fenton’s reagent in the presence of a high-frequency acoustic field has been investigated. Dyeing and textile effluents are the major sources of azo dyes, and are most troublesome among industrial wastewaters, causing imbalance in the eco-system. The effect of various operating conditions (initial concentration of dy...
To determine the feasibility of quantitative ultrasonic techniques to define the composition of atherosclerotic plaques, samples of freshly excised human aortas were sewn to a sample holder and immersed in a saline bath for ultrasonic interrogation. Integrated backscatter of a 2-microsecond portion of the backscattered radiofrequency signal was measured with a 10 MHz focused transducer. Integra...
Background & Aim: Medicinal plants are most valuable and useful sources as productive factors of drugs. Production and extraction of secondary metabolites have a huge economical importance in recent years. Carvone is a compound in Bunium persicum fruit and shoot and, it is one of the wide range varieties of valuable and useful secondary metabolites. Due to limited crop production, usin...
this work reports a facile sonochemical route in the synthesis of nano particle of deferasirox for the first time. one application of nanotechnology is in improvement of available treatments for various diseases. deferasirox (icl670 or exjade) is a tridentate chelating agent for removing transfusion overload iron in thalassemia patients. in the present work, deferasirox was prepared in nano size...
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