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  • Open Access

    ARTICLE

    Al2O3 and γAl2O3 Nanomaterials Based Nanofluid Models with Surface Diffusion: Applications for Thermal Performance in Multiple Engineering Systems and Industries

    Adnan1, Umar Khan2, Naveed Ahmed3, Syed Tauseef Mohyud-Din4, Ilyas Khan5,*, Dumitru Baleanu6,7,8, Kottakkaran Sooppy Nisar9

    CMC-Computers, Materials & Continua, Vol.66, No.2, pp. 1563-1576, 2021, DOI:10.32604/cmc.2020.012326

    Abstract Thermal transport investigation in colloidal suspensions is taking a significant research direction. The applications of these fluids are found in various industries, engineering, aerodynamics, mechanical engineering and medical sciences etc. A huge amount of thermal transport is essential in the operation of various industrial production processes. It is a fact that conventional liquids have lower thermal transport characteristics as compared to colloidal suspensions. The colloidal suspensions have high thermal performance due to the thermophysical attributes of the nanoparticles and the host liquid. Therefore, researchers focused on the analysis of the heat transport in nanofluids under diverse circumstances. As such, the… More >

  • Open Access

    ARTICLE

    Alleviation of Drought Stress in Wheat Using Exogenous Ulva prolifera Extract Produced by Enzymatic Hydrolysis

    Feiyu Li1, Siqi Zuo1, Yongzhou Chi1, Chunying Du1, Zhaopeng Shen1, Xihong Han2,3, Xiaohui Wang2,*, Peng Wang1,*

    Journal of Renewable Materials, Vol.8, No.11, pp. 1519-1529, 2020, DOI:10.32604/jrm.2020.011453

    Abstract Drought is one of the major abiotic stresses that affect plant growth and reduce agricultural productivity. Use of algal extract as a biostimulant is gaining increased attention from researchers. This study aimed to investigate the potential of Ulva prolifera extract (UE) as a biostimulant when enzymatically extracted under conditions of water deficit. UE treatments (0.02%, 0.06%, and 0.1%) significantly improved the shoot length, root length, and dry weight of roots after 120 h of drought stress relative to that in treatment with the negative control. An increase in catalase (CAT) and peroxidase (POD) activity was also observed that resulted in… More >

  • Open Access

    ARTICLE

    In Vitro Propagation, Isolation and Expression Studies of Suaeda edulis Genes Involved in the Osmoprotectants Biosynthesis

    Gloria Viviana Cerrillo-Rojas1, Mariana Tiscareño-Andrade1, Ana Erika Ochoa-Alfaro2, Eugenio Pérez-Molphe Balch1, Ruth Elena Soria-Guerra2, José Francisco Morales-Domínguez1,*

    Phyton-International Journal of Experimental Botany, Vol.89, No.3, pp. 715-726, 2020, DOI:10.32604/phyton.2020.09769

    Abstract Halophytes are an excellent choice for the study of genes conferring salt tolerance to salt-sensitive plants and, they are suitable for reclamation and remediation of saline soil. We develop an in vitro plant propagation protocol and studies of genes involved with GB and Pro biosynthesis in Suaeda edulis. Axillary buds were used as explants and cultured in different treatments on Murashige and Skoog (MS) medium supplemented with different concentrations and combinations of plant growth regulators. The highest number of multiple shoots was on MS medium containing 1 mg/L Benzyladenine (BA) and / or 2 g/L activated carbon with 5.5 ±… More >

  • Open Access

    ARTICLE

    Synthesis and Properties of Thermoplastic Polyisocyanurates: Polyisocyanuratoamide, Polyisocyanurato(Ester-Amide) and Polyisocyanurato (Urea-Ester)

    Rui Hou1, Zhihuang Zhang1, Guangzhao Zhang1, Donglin Tang1,2,3,*

    Journal of Renewable Materials, Vol.8, No.4, pp. 397-403, 2020, DOI:10.32604/jrm.2020.08912

    Abstract It has been proved that introducing isocyanurate into polymer chains could improve the flame retardancy of polymers. We describe in this work the synthesis and the thermal property study of three thermoplastic polyisocyanurates, which are polyisocyanuratoamide (PICA-6), polyisocyanurato(ester amide) (PICEA-6) and polyisocyanurato(urea ester) (PICUE-6). These polymers show similar and improved thermal stability with the existence of isocyanurate rings. PICA-6 is more crystalizable than the rest two and the melting temperature is found to be around 240°C but it still crystalizes slowly. For PICEA-6 and PICUE-6, only glass transition can be observed on the DSC traces. The glass transition temperature follows… More >

  • Open Access

    ARTICLE

    Isolation and molecular identification of cellulolytic bacteria from Dig Rostam hot spring and study of their cellulase activity

    Sareh HAJIABADI1, Mansour MASHREGHI1, Ahmad Reza BAHRAMI1,2, Kiarash GHAZVINI3, Maryam M. MATIN1,2,*

    BIOCELL, Vol.44, No.1, pp. 63-71, 2020, DOI:10.32604/biocell.2020.08171

    Abstract Cellulose is the main structural component of lignocellulosic wastes that can be converted to sugars and biofuels by cellulase. Due to wide applications of this enzyme in various industries around the world, cellulase is considered as the third industrial enzyme. The ability of thermophilic bacteria in the production of heat-stable cellulases has made them valuable tools in biotechnology. The aim of this study was isolation and molecular identification of cellulolytic thermophile bacteria from Dig Rostam hot spring and investigating their cellulase activity. Samples were taken from water and sediments of this hot spring, and cellulolytic bacteria were enriched in media… More >

  • Open Access

    Effect of Acetylation on the Mechanical and Thermal Properties of Soy Flour Elastomers

    Kendra A. Allen1, Sarah Cady2, David Grewell1*

    Journal of Renewable Materials, Vol.5, Suppl.1, pp. 124-126, 2017, DOI:10.7569/JRM.2017.634139

    Abstract Biobased fillers were utilized as components in soy-elastomer composites. Soy flour is lightweight, low cost, and high strength, which makes it an ideal alternative to petroleum-derived fillers. However, poor interfacial adhesion and low dispersion within the polymer matrix are limiting factors for composite performance. Soy flour chemically pretreated by acetylation was compounded with synthetic rubber elastomers. In general, soy flour (as received) concentration in the composite is proportional to the ultimate strength. However, soyelastomer composites with acetylated filler performed similar to the neat elastomer. In addition, the pretreated composite’s thermal stability increased and exhibited less phase seperation compared to the… More >

  • Open Access

    ARTICLE

    Intrahost distribution and trasmission of a new species of cyclopoid copepod endosymbiotic to a freshwater snail, Pomacea canaliculata (Caenogastropoda, Ampullariidae) from Argentina

    C. D. GAMARRA-LUQUES, I. A. VEGA, E. KOCH, A. CASTRO-VAZQUEZ

    BIOCELL, Vol.28, No.2, pp. 155-164, 2004, DOI:10.32604/biocell.2004.28.155

    Abstract A new species of cyclopoid copepod, Ozmana huarpium, is described as a symbiont to Pomacea canaliculata (Lamarck 1822) (Caenogastropoda, Ampullariidae). Rather large numbers (about one hundred copepods per snail) were found, although there was no evidence of harm to the host. To our knowledge, O. haemophila (symbiont to P. maculata), and the currently described species, O. huarpium, are the only copepod species ever recorded as endosymbionts to freshwater invertebrates. While O. haemophila is restricted to the haemocoel of its host, O. huarpium predominate in the penis sheath, the ctenidium and the mantle cavity, figuring in these pallial organs 63-65 %… More >

  • Open Access

    ARTICLE

    Variability of Metarhizium anisopliae var. anisopliae based on the Random Amplified Polymorphic DNA technique

    García-Pereyra J1, GN Aviña-Martínez1, AA Orozco-Flores2, OG Alvarado-Gómez3, M García-Montelongo4, G Alejandre-Iturbide5, JN Uribe-Soto5, H Medrano-Roldan6

    Phyton-International Journal of Experimental Botany, Vol.83, pp. 37-43, 2014, DOI:10.32604/phyton.2014.83.037

    Abstract It was analyzed the genetic variability of (1) three strains of a pathogenic fungi of the genus Metharhizium anisopliae var anisopliae, named MA22, MA24 and MA25, brand spesifik®; (2) two strains of the product Metasaven®, named MA1A and MAII; one strain of the product Metatron®; and a native strain named MACN. This latter strain was directly isolated from the insect chapulin (Brachystola magna), from the farmer, corn plots in Durango, located in north central Mexico. Studies were conducted in the laboratory of molecular biology of the Technological Institute of the Valley of Guardiana in Durango, Mexico, from September 2008 to… More >

  • Open Access

    ARTICLE

    Anatomophysiological modifications induced by solid agricultural waste (vermicompost) in lettuce seedlings (Lactuca sativa L.)

    Argüello JA, L Seisdedos, MC Díaz Goldfarb, EA Fabio, SB Núñez, A Ledesma

    Phyton-International Journal of Experimental Botany, Vol.82, pp. 289-295, 2013, DOI:10.32604/phyton.2013.82.289

    Abstract The objective of this work was to analyze the impact of a vermicompost treatment on anatomical and physiological modifications related to assimilate partitioning and growth in lettuce seedlings. The results showed that vermicompost increased growth, which was most likely due to an increased activity of the ground meristem of the leaf blade. A greater height and number of chlorenchyma layers were observed in the leaf blade. This was related to an increase in the photosynthetic activity, expressed by an increase in the net assimilation rate. Vermicompost also showed an effect at the procambium level, producing an increase in the number… More >

  • Open Access

    ARTICLE

    Chitinase, chitosanase, and antifungal activities from thermophilic streptomycetes isolated from compost

    González-Franco AC1, L Robles-Hernández1, JL Strap2

    Phyton-International Journal of Experimental Botany, Vol.86, pp. 14-27, 2017, DOI:10.32604/phyton.2017.86.014

    Abstract The Streptomyces genus comprises a large and diverse group of bacteria, many of which are commercially exploited for the production of antibiotics and lytic enzymes. The thermophilic species are less studied than the predominant mesophilic species. However, the first ones are a potential source of thermostable bioactive products and enzymes with novel properties. In this study, two selected thermophilic streptomycetes were identified and their chitinolytic activities were evaluated. The identification of these two isolates was performed by microscopic morphology, partial 16S rDNA sequences, and its phylogenetic analysis. To study the chitinolytic activities of these isolates, the effects of colloidal chitin… More >

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