Carbon Dot/Gold Nanocluster-Based Fluorescent Colorimetric Paper Strips for Quantitative Detection of Iodide Ions in Urine

2021 ◽  
Author(s):  
Ruoxuan Jiang ◽  
Yuchao Zhang ◽  
Qianru Zhang ◽  
Lingfei Li ◽  
Liang Yang
Keyword(s):  
Quantitative Detection ◽  
Gold Nanocluster ◽  
Carbon Dot ◽  
Iodide Ions

Carbon dot mediated trihybrid formation by reduction of GO and in situ gold nanocluster fabrication: photo-switching behaviour and degradation of chemical warfare agent stimulants

2020 ◽  
Vol 8 (44) ◽  
pp. 15735-15741
Author(s):  
Subir Paul ◽  
Niladri Hazra ◽  
Soumyajit Hazra ◽  
Arindam Banerjee
Keyword(s):  
Gold Nanoclusters ◽  
Chemical Warfare Agent ◽  
Chemical Warfare ◽  
Gold Nanocluster ◽  
Carbon Dot ◽  
Switching Behaviour ◽  
Mediated Reduction

Carbon dot mediated reduction of GO and simultaneous fabrication of gold nanoclusters leading to a trinanohybrid system, photocurrent measurements and degradation of methylparaoxon.

Rapid and sensitive detection of Salmonella typhimurium using aptamer-conjugated carbon dots as fluorescence probe

2015 ◽  
Vol 7 (5) ◽  
pp. 1701-1706 ◽  
Author(s):  
Renjie Wang ◽  
Yi Xu ◽  
Tao Zhang ◽  
Yan Jiang
Keyword(s):  
Salmonella Typhimurium ◽  
Carbon Dots ◽  
Fluorescence Probe ◽  
Sensitive Detection ◽  
Quantitative Detection ◽  
Carbon Dot

Aptamer-conjugated carbon dot complexes were developed and first used as a novel fluorescence probe for sensitive quantitative detection of Salmonella typhimurium.

scholarly journals A novel carbon dot/polyacrylamide composite hydrogel film for reversible detection of the antibacterial drug ornidazole

RSC Advances ◽  
2021 ◽  
Vol 11 (37) ◽  
pp. 22993-23001
Author(s):  
Weizhen Wu ◽  
Xiaoyi Wu ◽  
Miao He ◽  
Xiaolin Yuan ◽  
Jiaping Lai ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Composite Hydrogel ◽  
Quantitative Detection ◽  
Antibacterial Drug ◽  
Blue Fluorescence ◽  
Carbon Dot ◽  
Real Samples ◽  
Hydrogel Film

A novel carbon dot/polyacrylamide composite hydrogel film with stable blue fluorescence performance was fabricated by merging a hydrogel film and carbon dots, which was used for highly selective and quantitative detection of ONZ in real samples.

Therapeutic efficacy of some extracts of hot pepper fruits (Capsicum annuum) and Sumac seeds (Rhus coriaria) on the growth of some isolated dermatophytes species

2018 ◽  
Vol 1 (3) ◽  
pp. 52-62
Author(s):  
Sara Omran ◽  
Abdulghani Alsamarai ◽  
Firas Razzzaq
Keyword(s):  
Antifungal Activity ◽  
Fungal Infection ◽  
Aqueous Extract ◽  
Plant Extracts ◽  
Therapeutic Efficacy ◽  
Diffusion Method ◽  
Quantitative Detection ◽  
Hot Pepper ◽  
Alcoholic Extract ◽  
Dermatology Clinic

Background: Fungal infections are one of the common skin diseases with difficulty in their treatment approach. The present efficient drugs for fungal infection are limited. Aim: To determine the therapeutic efficacy of plant extracts as alternative antifungal agents. Materials and methods: 100 clinical samples [68 from female and 32 from male] were collected during the period from March to July 2017 from subjects attending Dermatology Clinic in Salah Uldean General Hospital. Fungal infection was diagnosed with using KOH wet preparation. Fungal species identified by using conventional approach. The active ingredients existing in the plant extracts were detected and analyzed through qualitative and quantitative detection technique of chemical compounds using a high performance liquid chromatographic device (HPLC). Agar diffusion method was used to determine antifungal activity of plant extracts. Results: Direct microscopic examination showed that there were (75%) positive samples, while culture shows (67%) positive samples. The isolated dermatophytes belong to Epidermophyoton, Microsporum, and Trichophyton genus. The predominant dermatophytes were T. rubrum (25%) species. The highest frequency of infection was in the age group of 11-20 years. The sensitivity of the tested fungi to the aqueous and alcoholic plant extracts varies. Alcoholic extract of the hot pepper plant was more effective as antifungal than the aqueous extract of the same plant. However, aqueous hot pepper extracts was more effective against T. mentagrophyte than that of alcoholic extract. Additionally, alcoholic Sumac extract shows higher efficacy that aqueous extract. Conclusion: Hot pepper and Sumac extracts show antifungal activity against Microsporum canis, Trichophyton rubrum and T. mentagrophyte.

Quantitative detection and imaging of soot particles by laser induced incandescence

1997 ◽  
Author(s):  
K. McManus ◽  
M. Allen ◽  
W. Rawlins ◽  
K. McManus ◽  
M. Allen ◽  
...  
Keyword(s):  
Quantitative Detection ◽  
Soot Particles ◽  
Laser Induced Incandescence

Advances in approaches for the quantitative detection of microRNAs

2010 ◽  
Vol 32 (1) ◽  
pp. 31-40
Author(s):  
Hua JING ◽  
Qin-Xin SONG ◽  
Guo-Hua ZHOU
Keyword(s):  
Quantitative Detection

Determination of Impurities in Perampanel Bulk Drugs by High-Performance Liquid Chromatography and Gas Chromatography

2020 ◽  
Vol 16 ◽  
Author(s):  
Yun-Yan Xia ◽  
Qiao-Gen Zou ◽  
Yu-Fei Yang ◽  
Qian Sun ◽  
Cheng-Qun Han
Keyword(s):  
Gas Chromatography ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Quantitative Detection ◽  
Dihydrogen Phosphate ◽  
Phosphate Solution ◽  
Related Impurities ◽  
Bulk Drug

Background: High-performance liquid chromatography (HPLC) method has been used to detect related impurities of perampanel. However, the detection of impurities is incomplete, and the limits of quantification and detection are high. A sensitive, reliable method is in badly to be developed and applied for impurity detection of perampanel bulk drug. Objective: Methodologies utilising HPLC and gas chromatography (GC) were established and validated for quantitative determination of perampanel and its related impurities (a total of 10 impurities including 2 genotoxic impurities). Methods: The separation was achieved on a Dikma Diamonsil C18 column (250 mm × 4.6 mm, 5 μm) with the mobile phase of 0.01 mol/L potassium dihydrogen phosphate solution (A) and acetonitrile (B) in gradient elution mode. The compound 2-bromopropane was determined on an Agilent DB-624 column (0.32 mm × 30 m, 1.8 μm) by electron capture detector (μ-ECD) with split injection ratio of 1:5 and proper gradient temperature program. Result: Both HPLC and GC methods were established and validated to be sensitive, accurate and robust according to International Council for Harmonization (ICH) guidelines. The methods developed were linear in the selected concentration range (R 2≥0.9944). The average recovery of all impurities was between 92.6% and 103.3%. The possible production mechanism of impurities during the synthesis and degradation processes of perampanel bulk drug was also discussed. Five impurities were analyzed by liquid chromatography–mass spectrometry (LC-MS). Moreover, two of them were simultaneously characterized by LC-MS, IR and NMR. Conclusion: The HPLC and GC methods were developed and optimized, which could be applied for quantitative detection of the impurities, and further stability study of perampanel.

Non-enzymatic determination of purine nucleotides using a carbon dot modified glassy carbon electrode

2019 ◽  
Vol 11 (30) ◽  
pp. 3866-3873 ◽  
Author(s):  
R. Karthikeyan ◽  
D. James Nelson ◽  
S. Abraham John
Keyword(s):  
Glassy Carbon ◽  
Low Cost ◽  
Phosphate Buffer Solution ◽  
Purine Nucleotides ◽  
Buffer Solution ◽  
Solution Ph ◽  
Carbon Dot ◽  
Enzymatic Determination ◽  
Sensitive Determination

Selective and sensitive determination of one of the purine nucleotides, inosine (INO) using a low cost carbon dot (CD) modified glassy carbon (GC) electrode in 0.2 M phosphate buffer solution (pH 7.2) was demonstrated in this paper.

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