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Background: Cannabis saliva(hemp) is a source of various biologically active compounds, for instance, cannabinoids, terpenes and phenolic compounds, which exhibit antibacterial, antifungal, anti-inflammatory and anticancer properties. With the purpose of expanding the auxiliary application of C. sativa in the field of bio-nanotechnology, we explored the plant for green and efficient synthesis of gold nanoparticles (AuNPs) and silver nanoparticles (AgNPs).Methods and results: The nanoparticles were synthesized by utilizing an aqueous extract of C. sativa stem separated into two different fractions (cortex and core [xylem part]) without any additional reducing, stabilizing and capping agents. In the synthesis of AuNPs using the cortex enriched in bast fibers, fiber-AuNPs (F-AuNPs) were achieved. When using the core part of the stem, which is enriched with phenolic compounds such as alkaloids and cannabinoids, core-AuNPs (C-AuNPs) and core-AgNPs (C-AgNPs) were formed. Synthesized nanoparticles were characterized by UV-visible analysis, transmission electron microscopy, atomic force microscopy, dynamic light scattering, Fourier transform infrared, and matrix-assisted laser desorption/ionization timeof-flight. In addition, the stable nature of nanoparticles has been shown by thermogravimetric analysis and inductively coupled plasma mass spectrometry (ICP-MS). Finally, the AgNPs were explored for the inhibition of Pseudomonas aeruginosa and Escherichia coli biofilms.Condusion: The synthesized nanoparticles were crystalline with an average diameter between 12 and 18 nm for F-AuNPs and C-AuNPs and in the range of 20-40 nm for C-AgN Ps. ICP-MS analysis revealed concentrations of synthesized nanoparticles as 0.7, 4.5 and 3.6 mg/mL for F-AuNPs, C-AuNPs and C-AgNPs, respectively. Fourier transform infrared spectroscopy revealed the presence of flavonoids, cannabinoids, terpenes and phenols on the nanoparticle surface, which could be responsible for reducing the salts to nanopar

Al2O3 and TiO2 nanoparticles were added to deionized water to study the effects of enthalpy of evaporation, saturated vapor pressure and evaporation rate. The results show that the enthalpy of evaporation decreased with an increase of nanoparticle concentration and the larger the nanoparticle size, the smaller the enthalpy of evaporation. Two experiments were built to determine the saturated vapor pressure and the evaporation rate of nanofluids. The results show that most of the nanofluids have lower saturated vapor pressure and evaporation rate than those of water, particularly with an increase of nanoparticle concentration, but a few nanofluids with lower volume concentrations show slightly larger values than those of water. Therefore, the evaporation rate of nanofluids as well as their saturated vapor pressure, can be increased or decreased, depending on their volume concentration and the type of nanofluid. Besides, a semi-analytical model for estimating the evaporation rate of water and nanofluids as a function of temperature, humidity and air velocity was developed. After comparing the modeling results with the experiment, the agreement between them is generally good. Lastly, some nanofluids were tested as an adsorbate in an adsorption cooling system, and the results show that using 0.01% TiO2 nanofluid as the adsorbate enhances the cooling performance by about 9%. (C) 2015 Elsevier Ltd. All rights reserved.

Al2O3 and TiO2 nanoparticles were added to deionized water to study the effects of enthalpy of evaporation, saturated vapor pressure and evaporation rate. The results show that the enthalpy of evaporation decreased with an increase of nanoparticle concentration and the larger the nanoparticle size, the smaller the enthalpy of evaporation. Two experiments were built to determine the saturated vapor pressure and the evaporation rate of nanofluids. The results show that most of the nanofluids have lower saturated vapor pressure and evaporation rate than those of water, particularly with an increase of nanoparticle concentration, but a few nanofluids with lower volume concentrations show slightly larger values than those of water. Therefore, the evaporation rate of nanofluids as well as their saturated vapor pressure, can be increased or decreased, depending on their volume concentration and the type of nanofluid. Besides, a semi-analytical model for estimating the evaporation rate of water and nanofluids as a function of temperature, humidity and air velocity was developed. After comparing the modeling results with the experiment, the agreement between them is generally good. Lastly, some nanofluids were tested as an adsorbate in an adsorption cooling system, and the results show that using 0.01% TiO2 nanofluid as the adsorbate enhances the cooling performance by about 9%. (C) 2015 Elsevier Ltd. All rights reserved.

Al2O3 and TiO2 nanoparticles were added to deionized water to study the effects of enthalpy of evaporation, saturated vapor pressure and evaporation rate. The results show that the enthalpy of evaporation decreased with an increase of nanoparticle concentration and the larger the nanoparticle size, the smaller the enthalpy of evaporation. Two experiments were built to determine the saturated vapor pressure and the evaporation rate of nanofluids. The results show that most of the nanofluids have lower saturated vapor pressure and evaporation rate than those of water, particularly with an increase of nanoparticle concentration, but a few nanofluids with lower volume concentrations show slightly larger values than those of water. Therefore, the evaporation rate of nanofluids as well as their saturated vapor pressure, can be increased or decreased, depending on their volume concentration and the type of nanofluid. Besides, a semi-analytical model for estimating the evaporation rate of water and nanofluids as a function of temperature, humidity and air velocity was developed. After comparing the modeling results with the experiment, the agreement between them is generally good. Lastly, some nanofluids were tested as an adsorbate in an adsorption cooling system, and the results show that using 0.01% TiO2 nanofluid as the adsorbate enhances the cooling performance by about 9%. (C) 2015 Elsevier Ltd. All rights reserved.