This paper describes a portable microwave assisted extraction apparatus (PMAE) for extraction of bioactive compounds especially essential oils and aromas directly in a crop or in a forest. The developed procedure, based on the concept of green analytical chemistry, is appropriate to obtain direct in-field information about the level of essential oils in natural samples and to illustrate green chemical lesson and research. The efficiency of this experiment was validated for the extraction of essential oil of rosemary directly in a crop and allows obtaining a quantitative information on the content of essential oil, which was similar to that obtained by conventional methods in the laboratory.
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http://dx.doi.org/10.1016/j.chroma.2013.09.053 | DOI Listing |
Int J Biol Macromol
December 2024
Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province & Key Laboratory of Life-Organic Analysis of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, PR China. Electronic address:
Environmental safety and protection is one of the most concerned topics nowadays. To conveniently monitor toxic S/CrO and to regulate bioactive Fe, Ti-co-Ce oxide decorated chitosan fiber (Ti-co-Ce ox@CC) was developed using microwave-assisted hydrothermal method. The integration of chitosan fiber and nano Ti-co-Ce oxide endowed Ti-co-Ce ox@CC with superior oxidase-like activity and improved water-dispersibility.
View Article and Find Full Text PDFSci Adv
December 2024
Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA.
A method is presented for high-precision chemical detection that integrates quantum sensing with droplet microfluidics. Using nanodiamonds (ND) with fluorescent nitrogen-vacancy (NV) centers as quantum sensors, rapidly flowing microdroplets containing analyte molecules are analyzed. A noise-suppressed mode of optically detected magnetic resonance is enabled by pairing controllable flow with microwave control of NV electronic spins, to detect analyte-induced signals of a few hundredths of a percent of the ND fluorescence.
View Article and Find Full Text PDFOpen Access Emerg Med
December 2024
COES Arezzo, Dipartimento Emergenza Territoriale, Azienda USL Toscana Sud Est, Arezzo, Italia.
Purpose: Mild Traumatic brain injury is classified based on Glasgow Coma Scale (GCS 13-15), it also involves transient alteration of brain function, which may lead to severe short- and long-term sequelae. When treating a patient with a mild head injury outside the hospital, it is of crucial importance to decide whether to transport him to a center without neurosurgery or to a center equipped with neurosurgery (primary centralization). Recent decades have seen exploration of portable, non-invasive devices for intracranial injury and stroke detection, with microwave frequency electromagnetic field technology showing promising clinical outcomes.
View Article and Find Full Text PDFCarbohydr Polym
February 2025
State key laboratory base of eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao, Shandong province 266042, PR China. Electronic address:
J Mater Chem B
November 2024
Department of Bionanotechnology, Gachon University, Gyeonggi-do 13120, Republic of Korea.
Next-generation 2D materials, such as transition metal carbides and nitrides (MXenes), have received increasing attention owing to their physicochemical properties. In this study, we synthesized highly intense fluorescent materials, nitrogen-doped MXene quantum dots (N-MQDs) using an easy and less time-consuming microwave-assisted method. These N-MQDs are spherical, fluorescent, and highly sensitive materials, as confirmed by high-resolution transmission electron microscopy, atomic force microscopy, UV-visible, fluorescence, Fourier transform infrared spectroscopy, X-ray diffraction, Raman spectroscopy, zeta potential, and contact angle measurements.
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