Selective imaging of diamond nanoparticles within complex matrices using magnetically induced fluorescence contrast

2020 ◽  
Vol 7 (2) ◽  
pp. 525-534
Author(s):  
Zachary R. Jones ◽  
Nicholas J. Niemuth ◽  
Margaret E. Robinson ◽  
Olga A. Shenderova ◽  
Rebecca D. Klaper ◽  
...  
Keyword(s):  
Environmental Matrices ◽  
Complex Matrices ◽  
Diamond Nanoparticles ◽  
Fluorescence Contrast ◽  
Nv Centers

The unique properties of NV centers in diamond nanoparticles enable selective identification within organisms and other complex environmental matrices.

scholarly journals Measuring NV Centers in Diamond Nanoparticles using Electron Energy Loss Spectroscopy

2021 ◽  
Vol 27 (S1) ◽  
pp. 1194-1195
Author(s):  
Shery Chang ◽  
Haotian Wen ◽  
David Kordahl ◽  
Christian Dwyer
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Diamond Nanoparticles ◽  
Electron Energy Loss ◽  
Nv Centers

“Core–Shell” Diamond Nanoparticles with NV– Centers and a Highly Isotopically Enriched 13C Shell as a Promising Hyperpolarization Agent

2021 ◽  
Author(s):  
Yuliya Mindarava ◽  
Rémi Blinder ◽  
Valery A. Davydov ◽  
Mustapha Zaghrioui ◽  
Viatcheslav N. Agafonov ◽  
...  
Keyword(s):  
Core Shell ◽  
Diamond Nanoparticles ◽  
Nv Centers

scholarly journals Single-particle ICP-TOFMS with online microdroplet calibration for the simultaneous quantification of diverse nanoparticles in complex matrices

2019 ◽  
Vol 6 (11) ◽  
pp. 3349-3358 ◽  
Author(s):  
Kamyar Mehrabi ◽  
Detlef Günther ◽  
Alexander Gundlach-Graham
Keyword(s):  
Single Particle ◽  
Particle Number ◽  
Number Concentration ◽  
Inorganic Nanoparticles ◽  
Particle Number Concentration ◽  
Environmental Matrices ◽  
Complex Matrices ◽  
Simultaneous Quantification

Online microdroplet calibration is used to determine the mass and particle number concentration of inorganic nanoparticles (NPs) without the use of NP standards. This approach can be applied directly to quantify NPs in environmental matrices.

THE ROLE OF POLYETHYLENIMINE IN ENHANCING PERFORMANCE OF GLUTAMATE BIOSENSORS

2018 ◽  
Vol 8 (3) ◽  
pp. 36-41
Author(s):  
Diep Do Thi Hong ◽  
Duong Le Phuoc ◽  
Hoai Nguyen Thi ◽  
Serra Pier Andrea ◽  
Rocchitta Gaia
Keyword(s):  
First Generation ◽  
Good Reproducibility ◽  
Complex Matrices ◽  
Long Term Stability ◽  
In Vitro Characterization ◽  
Glutamate Oxidase

Background: The first biosensor was constructed more than fifty years ago. It was composed of the biorecognition element and transducer. The first-generation enzyme biosensors play important role in monitoring neurotransmitter and determine small quantities of substances in complex matrices of the samples Glutamate is important biochemicals involved in energetic metabolism and neurotransmission. Therefore, biosensors requires the development a new approach exhibiting high sensibility, good reproducibility and longterm stability. The first-generation enzyme biosensors play important role in monitoring neurotransmitter and determine small quantities of substances in complex matrices of the samples. The aims of this work: To find out which concentration of polyethylenimine (PEI) exhibiting the most high sensibility, good reproducibility and long-term stability. Methods: We designed and developed glutamate biosensor using different concentration of PEI ranging from 0% to 5% at Day 1 and Day 8. Results: After Glutamate biosensors in-vitro characterization, several PEI concentrations, ranging from 0.5% to 1% seem to be the best in terms of VMAX, the KM; while PEI content ranging from 0.5% to 1% resulted stable, PEI 1% displayed an excellent stability. Conclusions: In the result, PEI 1% perfomed high sensibility, good stability and blocking interference. Furthermore, we expect to develop and characterize an implantable biosensor capable of detecting glutamate, glucose in vivo. Key words: Glutamate biosensors, PEi (Polyethylenimine) enhances glutamate oxidase, glutamate oxidase biosensors

scholarly journals The Physical-Mechanical and Electrical Properties of Cast Aluminum-Based Alloys Reinforced with Diamond Nanoparticles

2015 ◽  
Vol 57 (11) ◽  
pp. 1485-1490 ◽  
Author(s):  
S. A. Vorozhtsov ◽  
А. P. Khrustalyov ◽  
D. G. Eskin ◽  
S. N. Кulkov ◽  
N. Alba-Baena
Keyword(s):  
Electrical Properties ◽  
Cast Aluminum ◽  
Diamond Nanoparticles ◽  
Mechanical And Electrical Properties

scholarly journals Use of Oxidative Stress Responses to Determine the Efficacy of Inactivation Treatments on Cryptosporidium Oocysts

2021 ◽  
Vol 9 (7) ◽  
pp. 1463
Author(s):  
Tamirat Tefera Temesgen ◽  
Kristoffer Relling Tysnes ◽  
Lucy Jane Robertson
Keyword(s):  
Oxidative Stress ◽  
Stress Responses ◽  
Target Genes ◽  
Cryptosporidium Oocyst ◽  
Drinking Water Treatment ◽  
Proof Of Concept ◽  
Environmental Matrices ◽  
Oocyst Wall ◽  
Novel Approach ◽  
Cryptosporidium Oocysts

Cryptosporidium oocysts are known for being very robust, and their prolonged survival in the environment has resulted in outbreaks of cryptosporidiosis associated with the consumption of contaminated water or food. Although inactivation methods used for drinking water treatment, such as UV irradiation, can inactivate Cryptosporidium oocysts, they are not necessarily suitable for use with other environmental matrices, such as food. In order to identify alternative ways to inactivate Cryptosporidium oocysts, improved methods for viability assessment are needed. Here we describe a proof of concept for a novel approach for determining how effective inactivation treatments are at killing pathogens, such as the parasite Cryptosporidium. RNA sequencing was used to identify potential up-regulated target genes induced by oxidative stress, and a reverse transcription quantitative PCR (RT-qPCR) protocol was developed to assess their up-regulation following exposure to different induction treatments. Accordingly, RT-qPCR protocols targeting thioredoxin and Cryptosporidium oocyst wall protein 7 (COWP7) genes were evaluated on mixtures of viable and inactivated oocysts, and on oocysts subjected to various potential inactivation treatments such as freezing and chlorination. The results from the present proof-of-concept experiments indicate that this could be a useful tool in efforts towards assessing potential technologies for inactivating Cryptosporidium in different environmental matrices. Furthermore, this approach could also be used for similar investigations with other pathogens.

scholarly journals Shallow NV centers augmented by exploiting n-type diamond

Carbon ◽  
2021 ◽  
Author(s):  
A. Watanabe ◽  
T. Nishikawa ◽  
H. Kato ◽  
M. Fujie ◽  
M. Fujiwara ◽  
...  
Keyword(s):  
Nv Centers
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