42 results match your criteria: "University of Tehran Karaj[Affiliation]"
RSC Adv
March 2020
Department of Chemical Engineering, Faculty of Engineering, University of Malaya W. Persekutuan Kuala Lumpur 50603 Kuala Lumpur Malaysia.
In the present research, artificial neural network (ANN) modelling was utilized to determine the relative importance of effective variables to achieve optimum specific surface areas of a synthesized catalyst. Initially, carbonaceous nanocrystalline mesoporous NiO core-shell solid sphere composites were produced by applying incomplete carbonized glucose (ICG) as the pore directing agent and polyethylene glycol (PEG; 4000) as the surfactant a hydrothermal-assisted method. The Brunauer-Emmett-Teller (BET) model was applied to ascertain the textural characteristics of the as-prepared mesoporous NiO catalyst.
View Article and Find Full Text PDFRefugia are critical for the maintenance of biodiversity during the periods of Quaternary climatic oscillations. The long-term persistence of refugial populations in a large continuous refugium has resulted in a homogenous pattern of genetic structure among populations, while highly structured evolutionary lineages characterize the restriction of refugial populations to smaller subrefugia. These mechanisms have resulted in the identification of hot spots of biodiversity within putative glacial refugia.
View Article and Find Full Text PDFEgg white protein and chocolate milk were used for making protein beverage. Microbiological count, sensory attributes, and pH changes were investigated during 10 days of refrigerated storage. At the tenth day, the total numbers of bacteria were between 4.
View Article and Find Full Text PDFPremise Of The Study: Access to improved crop cultivars is the foundation for successful agriculture. New cultivars must have improved yields that are determined by quantitative and qualitative traits. Genotype-by-environment interactions (GEI) occur for quantitative traits such as reproductive fitness, longevity, height, weight, yield, and disease resistance.
View Article and Find Full Text PDFRole of putrescine for extending storage life of pear cv. "Shah-Miveh" and "Spadona" was evaluated. The trees were sprayed by various concentrations of putrescine (0.
View Article and Find Full Text PDFEcol Evol
December 2018
Department of Mammalogy and Ornithology Natural History Museum of Geneva Geneva Switzerland.
Species are the basic units for measuring biodiversity and for comprehending biological interactions. Yet, their delineation is often contentious, especially in groups that are both diverse and phenotypically conservative. Three cryptic species of long-eared bats, , and , co-occur over extensive areas of Western Europe.
View Article and Find Full Text PDFRSC Adv
November 2018
Division of Materials Science, Luleå University of Technology 97187 Luleå Sweden
In this work, three-dimensional (3D) aerogels and hydrogels based on lignin-containing arabinoxylan (AX) and cellulose nanofibers (CNF) were prepared. The effects of the CNF and the crosslinking with citric acid (CA) of various contents (1, 3, 5 wt%) were evaluated. All the aerogels possessed highly porous (above 98%) and lightweight structures.
View Article and Find Full Text PDFTwo strains of were engineered to accumulate pyruvic acid from two sugars found in lignocellulosic hydrolysates by knockouts in the , , , and genes. Additionally, since glucose and xylose are typically consumed sequentially due to carbon catabolite repression in , one strain (MEC590) was engineered to grow only on glucose while a second strain (MEC589) grew only on xylose. On a single substrate, each strain generated pyruvate at a yield of about 0.
View Article and Find Full Text PDFFront Physiol
March 2016
Department of Plant Protection, College of Agriculture and Natural Resources, University of Tehran Karaj, Iran.
The current study deals with a digestive α-amylase in the larvae of Pieris brassicae L. through purification, enzymatic characterization, gene expression, and in vivo effect of a specific inhibitor, Acarbose. Although α-amylase activity was the highest in the whole gut homogenate of larvae but compartmentalization of amylolytic activity showed an equal activity in posterior midgut (PM) and anterior midgut (AM).
View Article and Find Full Text PDFFood Sci Nutr
November 2015
Department of Agricultural Machinery Engineering Faculty of Agricultural, Engineering and Technology University of Tehran Karaj Iran.
In the study, the effectiveness of intermittent (IMWD) and continuous (CMWD) microwave drying and hot air drying (HAD) treatments on apple slices were compared in terms of drying kinetics (moisture diffusivity and activation energy) and critical physicochemical quality attributes (color change, rehydration ratio, bulk density, and total phenol content (TPC) of the final dried product. The temperature, microwave power, air velocity, and pulse ratio (PR) applied in the experiments were 40-80°C, 200-600 W, 0.5-2 m/s, and 2-6, respectively.
View Article and Find Full Text PDFFood Sci Nutr
July 2015
Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran Karaj, Iran.
In this study, response surface methodology was used for optimization of intermittent microwave-convective air drying (IMWC) parameters with employing desirability function. Optimization factors were air temperature (40-80°C), air velocity (1-2 m/sec), pulse ratio) PR ((2-6), and microwave power (200-600 W) while responses were rehydration ratio, bulk density, total phenol content (TPC), color change, and energy consumption. Minimum color change, bulk density, energy consumption, maximum rehydration ratio, and TPC were assumed as criteria for optimizing drying conditions of apple slices in IMWC.
View Article and Find Full Text PDFFood Sci Nutr
November 2014
Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran Karaj, Iran.
The purpose of this article was to present a new drying method for agricultural products. Electrohydrodynamic (EHD) has been applied for drying of agricultural materials due to several advantages such as energy saving, low cost equipment, low drying temperatures, and superior material quality. To evaluate this method, an EHD dryer based on solar (photovoltaic) energy was designed and fabricated.
View Article and Find Full Text PDFBraz J Microbiol
May 2015
Bioprocess Engineering Laboratory Department of Food Science & Engineering Faculty of Agricultural Engineering and Technology University of Tehran Karaj Iran Bioprocess Engineering Laboratory, Department of Food Science & Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran. ; Iranian Center of Excellence for Application of Modern Technologies for Producing Functional Foods and Drinks University of Tehran Karaj Iran Iranian Center of Excellence for Application of Modern Technologies for Producing Functional Foods and Drinks, University of Tehran, Karaj, Iran.
The interest in production of natural colorants by microbial fermentation has been currently increased. The effects of D-glucose concentration (3.18-36.
View Article and Find Full Text PDFFood Sci Nutr
May 2014
Department of Agricultural Machinery, Faculty of Agricultural Engineering and Technology, University of Tehran Karaj, Iran.
Energy consumption index is one of the most important criteria for judging about new, and emerging drying technologies. One of such novel and promising alternative of drying process is called electrohydrodynamic (EHD) drying. In this work, a solar energy was used to maintain required energy of EHD drying process.
View Article and Find Full Text PDFFront Physiol
January 2014
Department of Plant Protection, College of Agriculture and Natural Resources, University of Tehran Karaj, Iran.
Bacillus thuringiensis (Bt) is the most effective microbial control agent for controlling numerous species from different insect orders. All subspecies and strains of B. thuringiensis can produce a spore and a crystalline parasporal body.
View Article and Find Full Text PDFCommun Agric Appl Biol Sci
July 2006
Plant Protection Department, Faculty of Agriculture, University of Tehran Karaj, 31587-11167, Iran.
Plant-insect interaction is a dynamic system, subjected to continual variation and change. In order to reduce insect attack, plants developed different defence mechanisms including chemical and physical barriers such as the induction of defensive proteins, volatiles that attract predators of the insect herbivores and secondary metabolites. Proteinaceous inhibitors of alpha-amylase and proteases are widely distributed in cereals, legumes and some other plants.
View Article and Find Full Text PDFCommun Agric Appl Biol Sci
April 2005
Plant Protection Department, Faculty of Agriculture, University of Tehran Karaj, Iran.
The seasonal abundance and dynamics of potato-infesting aphids were studied in two seasons, on potato Solanum tuberosum L. with various types of transgenic and classical resistance to primary pests, especially the Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say). The lines tested were the NewLeaf potato, a transgenic expressing the Bacillus thuringiensis CryIIIA toxin (BTT); NYL 235-4 a parental line derived from S.
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