Detection of ascorbic acid and folic acid based on water-soluble CuInS2 quantum dots

The Analyst ◽  
2012 ◽  
Vol 137 (19) ◽  
pp. 4598 ◽  
Author(s):  
Siyu Liu ◽  
Junjie Hu ◽  
Xingguang Su
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Folic Acid ◽  
Water Soluble ◽  
Cuins2 Quantum Dots

scholarly journals Detection of sparfloxacin based on water-soluble CuInS2 quantum dots

2020 ◽  
Vol 2 ◽  
pp. 100027
Author(s):  
Jiajia Fang ◽  
Beina Dong ◽  
Yingqiang Fu ◽  
Dingxing Tang
Keyword(s):  
Quantum Dots ◽  
Water Soluble ◽  
Cuins2 Quantum Dots

Selective detection of folic acid in the midst of other biomolecules using water-soluble AgInS2 quantum dots

2019 ◽  
Vol 9 (4) ◽  
pp. 1306-1310 ◽  
Author(s):  
Bambesiwe M.M. May ◽  
Sundararajan Parani ◽  
Jose Varghese Rajendran ◽  
Oluwatobi S. Oluwafemi
Keyword(s):  
Quantum Dots ◽  
Folic Acid ◽  
Water Soluble ◽  
Selective Detection ◽  
Image Position

Abstract

scholarly journals One-pot synthesis of water-soluble near-infrared fluorescence RNase A capped CuInS2 quantum dots for in vivo imaging

RSC Advances ◽  
2017 ◽  
Vol 7 (80) ◽  
pp. 50949-50954 ◽  
Author(s):  
Yue Xi ◽  
Jianjun Yang ◽  
Yunshen Ge ◽  
Shenli Zhao ◽  
Jianguang Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Rnase A ◽  
Water Soluble ◽  
One Pot ◽  
Guided Surgery ◽  
Nir Fluorescence ◽  
Fluorescence Guided Surgery ◽  
Cuins2 Quantum Dots

Near-infrared (NIR) quantum dots (QDs) have been treated as a promising candidate of imaging agents for NIR fluorescence-guided surgery. Here, the RNase A-CuInS2 QDs is good candidate, which performers well in gastrointestinal system imaging.

The Synthesis of the Folate Acid Quantum Dots and Its Endocytosis in the Hepatoma Cells Mediated by the Folate Receptor

2019 ◽  
Vol 9 (6) ◽  
pp. 770-777
Author(s):  
Xiao-Li Zhu ◽  
Jing-Cheng Tang ◽  
Bing-Jiu Xu
Keyword(s):  
Quantum Dots ◽  
Folic Acid ◽  
Hepg2 Cells ◽  
Folate Receptor ◽  
Synthetic Medium ◽  
Water Soluble ◽  
Mercaptoacetic Acid ◽  
Green Method ◽  
Cds Qds ◽  
Hepg2 Cell Lines

Objectives: To synthesize folate acid conjugated quantum dots (QDs) by a simple and green method and explore endocytosis of the QD-folic acid conjugates (FA-QDs) into hepG2 cells. Methods: CdS QDs were prepared using stearic acid as synthetic medium, and were conjugated with mercaptoacetic acid (MAA) to be water-soluble. Then folic acid moiety was coupled to the surface of the QDs using EDC (1-ethyl-3-(3-dimethylamino propyl)carbodiimide) as a coupling agent. The CdS QDs and FA-QDs were characterized by X-ray spectroscopy (XRD), transmission electron microscopy (TEM), spectro fluorimetry and infrared spectroscopy. Endocytosis of the FA-QDs into hepG2 cells was observed by confocal microscopy and TEM. Results: TEM shows that the CdS QDs and FA-QDs were spherical in shape and had a diameter of 10 nm. Fluorescence spectrum of the QDs also shows their narrow size distribution. Confocal microscopic and TEM results show that FA-QDs were successfully internalized into the hepG2 cells. In addition, confocal results show that when the cells were first be saturated with excess free FA, the endocytosis of the FA-QDs became less, and CdS QDs that were not conjugated with FA were not able to be internalized into the hepG2 cells. Conclusions: The FA-QDs can be synthesized by a simple and green method and be used to successfully target tumor cells: hepG2 cell lines, which was probably mediated by the FA receptor.

scholarly journals Synthesis of Water-Soluble CuInS2 Quantum Dots by a Hydrothermal Method and Their Optical Properties

2019 ◽  
Vol 92 (5) ◽  
pp. 930-936 ◽  
Author(s):  
Kazutaka Iida ◽  
Yota Uehigashi ◽  
Hideki Ichida ◽  
Hang-Beom Bu ◽  
DaeGwi Kim
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Hydrothermal Method ◽  
Water Soluble ◽  
Cuins2 Quantum Dots

Transport and metabolism of water-soluble vitamins in intestine

1981 ◽  
Vol 240 (2) ◽  
pp. G97-G101
Author(s):  
R. C. Rose
Keyword(s):  
Health Care ◽  
Ascorbic Acid ◽  
Folic Acid ◽  
Potential Application ◽  
Water Soluble ◽  
Simple Diffusion ◽  
Technological Advances ◽  
Sodium Gradient ◽  
Membrane Bound ◽  
Types Of Information

An overview of intestinal absorption of water-soluble vitamins is presented. Evidence relating to absorption of ascorbic acid by the "sodium-gradient" hypothesis and folic acid by the "acidic microclimate" hypothesis is discussed. Over the last decade, vitamin absorption by the intestine has been attributed in large part to simple diffusion. Recently, however, this view has been changing as information continues to be gathered which suggests the participation of membrane-bound "carriers" in transport and the involvement of cellular enzymes in metabolism of the vitamins during absorption. The circumstances that make vitamin absorption difficult to investigate are described. A brief look toward the future stresses the types of information that will be helpful to acquire, identifies some technological advances that will promote progress, and discusses potential application of the results to health care. Some reasons are given for confusion that has prevailed in descriptions of vitamin absorption during the last decade; suggestions are made that might help investigators to correct this situation.

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