نتایج جستجو برای: microwave assisted hydrothermal technique

تعداد نتایج: 787513  

Journal: :Processes 2022

Hydrochars are an alternative form of biochar produced by hydrothermal carbonisation (HTC), a potentially cheaper and greener method. In this paper, the effect multiple variables on hydrochar properties was investigated. Waste biomass converted to via microwave-assisted carbonisation. The were temperature, solution ratio (water-biomass ratio), time, particle size, pH acetone washing. measured y...

Journal: :journal of research in health sciences 0
ghorban asgari abdolmotaleb seidmohammadi afsane chavoshani ali reza rahmani

background: pentachlorophenol (pcp) is one of the most fungicides and pesticides. acute and chronic poisoning from pcp may be occurred by dermal absorption, and respiration or ingestion. with respect to health and environmental effects of pcp, many methods were considered regarding its removal. microwave assisted other methods are environmental friendly, safety, and economical method, consequen...

2015
S. N. Mathad

The semiconductor spinel ferrite will have the chemical formula as AB2O4 (where A  divalent metal ion like Ni, Mn, Zn, etc and B  Iron metal ion Fe2 + and Fe3 +) and many studies have focused on the synthesis of nanomaterials because of extensive applications due to their novel properties. Magnetite and spinel ferrite nanocrystals are regarded as two of the most important inorganic nanomateri...

2012
Chunhui Ma Lei Yang Wenjie Wang Fengjian Yang Chunjian Zhao Yuangang Zu

An ultrasound and microwave assisted alternant extraction method (UMAE) was applied for extracting dihydroquercetin (DHQ) from Larix gmelinii wood. This investigation was conducted using 60% ethanol as solvent, 1:12 solid to liquid ratio, and 3 h soaking time. The optimum treatment time was ultrasound 40 min, microwave 20 min, respectively, and the extraction was performed once. Under the optim...

2015
Zhu-Yun Cai Fan Peng Yun-Peng Zi Feng Chen Qi-Rong Qian

Synthetic calcium phosphate (CaP)-based materials have attracted much attention in the biomedical field. In this study, we have investigated the effect of pH values on CaP nanostructures prepared using a microwave-assisted hydrothermal method. The hierarchical nanosheet-assembled hydroxyapatite (HAP) nanostructure was prepared under weak acidic conditions (pH 5), while the HAP nanorod was prepa...

2013
Kenny Vernieuwe Petra Lommens José C. Martins Freya Van Den Broeck Isabel Van Driessche Klaartje De Buysser

In this paper, the formation of ZrO₂ and yttria-stabilised-zirconia (YSZ) aqueous colloidal systems via microwave assisted hydrothermal synthesis is studied. Microwave synthesis allows a fast screening of the influence of different parameters such as time and temperature. The temperature varied from 140 °C up to 180 °C and the used reaction time varied from 5 min up to 1 h. The synthesised zirc...

Journal: :journal of agricultural science and technology 0
n. malekjani transfer phenomena laboratory (tpl), controlled release center, department of food science, technology and engineering, agricultural campus of the university of tehran, karaj, islamic republic of iran. z. emam-djomeh transfer phenomena laboratory (tpl), controlled release center, department of food science, technology and engineering, agricultural campus of the university of tehran, karaj, islamic republic of iran. s. h. hashemabadi school of chemical engineering, iran university of science and technology, tehran, islamic republic of iran. gh. r. askari transfer phenomena laboratory (tpl), controlled release center, department of food science, technology and engineering, agricultural campus of the university of tehran, karaj, islamic republic of iran.

microwave assisted fluidized bed drying is a novel drying technique which reduces drying time and yields higher quality products. in this study the effect of this method on color changes of whole and cut hazelnut kernels was investigated. the parameters of color and resulting total color change, chroma, hue angle and browning index were also calculated during drying in three temperatures (40, 5...

Journal: Journal of Herbal Drugs 2010
Afsaneh Yegdaneh, Behzad Zolfaghari

Various novel techniques including ultrasound-assisted extraction, microwave-assisted extraction and supercritical fluid extraction have been developed for the extraction of medicinal plants in order to shorten the extraction time, decrease the solvent consumption, increase the extraction yield, and enhance the quality of extracts. This review was conducted to introduce and compare the conventi...

Journal: :Nanoscale 2015
F F Muñoz L M Acuña C A Albornoz A G Leyva R T Baker R O Fuentes

In this work, nanostructured LnxCe(1-x)O2-δ (Ln: Gd and Pr; x = 0.1 and 0.2) spheres were synthesized by microwave assisted hydrothermal homogeneous co-precipitation and their properties were characterized by synchrotron radiation XRD, X-ray absorption near-edge spectroscopy (XANES) and scanning and high-resolution electron microscopy (SEM and HRTEM). In situ XRD and XANES experiments were carr...

Journal: Journal of Herbal Drugs 2010
Afsaneh Yegdaneh, Behzad Zolfaghari

Various novel techniques including ultrasound-assisted extraction, microwave-assisted extraction and supercritical fluid extraction have been developed for the extraction of medicinal plants in order to shorten the extraction time, decrease the solvent consumption, increase the extraction yield, and enhance the quality of extracts. This review was conducted to introduce and compare the conventi...

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