Resonant frequency tuning of nanobeams by piezoelectric nanowires under thermo-electro-magnetic field: a theoretical study

Micro & nano letters

article

Mohammad Reza Farajpour¹  Alireza Shahidi²  Ali Farajpour² 

[1] Borjavaran Center of Applied Science and Technology, University of Applied Sciences and Technology;Department of Mechanical Engineering, Isfahan University of Technology

关键词: beams (structures);    piezoelectricity;    vibrations;    differential equations;    nanowires;    elasticity;    partial differential equations;    integration;    nonlocal piezoelasticity;    smart nanoscale system;    piezoelectric nanosystem;    piezoelectric nanowire;    nanoscale beams;    Timoshenko beam theory;    partial differential equations;    nanobeams;    differential quadrature method;   

DOI  :  10.1049/mnl.2018.5286

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Calendula officinalis L. (Asteraceae) known as marigold is known to have several pharmacological activities and used for the treatment of several diseases as measles, jaundice, constipation and several inflammations. Marigold flowers contain several chemical constituents mainly flavonoids, triterpenoids and essential oil. In this study marigold flowers cultivated in Iraq had been investigated for its flavonoids content. The study revealed the presence of quercetin and kaempferol glycosides and the absence of myricetin glycosides. The flowers were extracted with ethanol 70% fractionated with different solvent and the flavonoids were isolated by preparative HPLC. The isolated flavonoids were identified by measuring melting points, UV, IR, analytical HPLC and TLC.Keywords: Marigold, Flavonoids, Kaempferol, Preparative HPLC.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND