Literature DB >> 27392974

Thioglycolic Acid-Capped CdS Quantum Dots Conjugated to α-Amylase as a Fluorescence Probe for Determination of Starch at Low Concentration.

Mahnoush Tayebi1, Mohammad Tavakkoli Yaraki2, Azadeh Mogharei1, Mahnaz Ahmadieh1, Mohammadreza Tahriri3,4,5, Daryoosh Vashaee6, Lobat Tayebi7,8.   

Abstract

In the present research, water soluble thioglycolic acid-capped CdS quantum dots (QDs) were synthesized by chemical precipitation method. The characteristics of prepared quantum dots were determined using X-Ray Diffraction (XRD) and Transmission Electron Microscopy (TEM). The obtained results revealed that CdS QDs have 5.60 nm crystallite size, hexagonal wurtzite structure and spherical morphology with less than 10 nm diameter. The photoluminescence (PL) spectroscopy was performed in order to study the effect of the presence of starch solutions. Blue emission peaks were positioned at 488 nm and its intensity quenched by increasing the concentration of starch solutions. The result of PL quenches in range of studied concentrations (0-100 ppm) was best described by Michaelis-Menten model. The amount of Michaelis constant (Km) for immobilized α-amylase in this system was about 68.08 ppm which showed a great tendency of enzyme to hydrolyze the starch as substrate. Finally, the limit of detection (LOD) was found to be about 2.24 ppm.

Entities:  

Keywords:  CdS QDs; Photoluminescence; Starch; Synthesis; Thioglycolic acid; α-amylase

Mesh：

Substances：

Year:  2016        PMID： 27392974     DOI： 10.1007/s10895-016-1870-8

Source DB:  PubMed          Journal:  J Fluoresc        ISSN： 1053-0509            Impact factor:   2.217


  9 in total

1.  Near infrared induced optical heating in laser ablated Bi quantum dots.

Authors:  R K Verma; K Kumar; S B Rai
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2.  Short communication: Thermostability of α-amylase produced by Bacillus sp. E2-a thermophilic mutant.

Authors:  N Goyal; G S Sidhu; T Chakrabarti; J K Gupta
Journal:  World J Microbiol Biotechnol       Date:  1995-09       Impact factor: 3.312

Review 3.  Properties and applications of starch-converting enzymes of the alpha-amylase family.

Authors:  Marc J E C van der Maarel; Bart van der Veen; Joost C M Uitdehaag; Hans Leemhuis; L Dijkhuizen
Journal:  J Biotechnol       Date:  2002-03-28       Impact factor: 3.307

4.  Facile synthesis and step by step enhancement of blue photoluminescence from Ag-doped ZnS quantum dots.

Authors:  Sonal Sahai; Mushahid Husain; Virendra Shanker; Nahar Singh; D Haranath
Journal:  J Colloid Interface Sci       Date:  2011-02-17       Impact factor: 8.128

5.  Reverse micelle-derived Cu-doped Zn(1-x)Cd(x)S quantum dots and their core/shell structure.

Authors:  Jong-Uk Kim; Young Kwan Kim; Heesun Yang
Journal:  J Colloid Interface Sci       Date:  2009-09-24       Impact factor: 8.128

6.  Biochemical characterization of raw-starch-digesting alpha amylase purified from Bacillus amyloliquefaciens.

Authors:  Dhanya Gangadharan; K Madhavan Nampoothiri; Swetha Sivaramakrishnan; Ashok Pandey
Journal:  Appl Biochem Biotechnol       Date:  2008-09-04       Impact factor: 2.926

7.  Determination of the concentration of maltose- and starch-like compounds in drinking water by growth measurements with a well-defined strain of a Flavobacterium species.

Authors:  D van der Kooij; W A Hijnen
Journal:  Appl Environ Microbiol       Date:  1985-04       Impact factor: 4.792

8.  Flocculation and coalescence of droplets in oil-in-water emulsions formed with highly hydrolysed whey proteins as influenced by starch.

Authors:  Aiqian Ye; Yacine Hemar; Harjinder Singh
Journal:  Colloids Surf B Biointerfaces       Date:  2004-10-10       Impact factor: 5.268

9.  Direct potentiometric determination of starch using a platinum redox sensor.

Authors:  Nikola Sakač; Milan Sak-Bosnar; Marija Horvat
Journal:  Food Chem       Date:  2012-11-08       Impact factor: 7.514
  9 in total
  6 in total

1.  Fluorescent Carbon Dot as Nanosensor for Sensitive and Selective Detection of Cefixime Based on Inner Filter Effect.

Authors:  Farhad Akhgari; Naser Samadi; Khalil Farhadi
Journal:  J Fluoresc       Date:  2017-01-11       Impact factor: 2.217

2.  Green and Cost Effective Synthesis of Fluorescent Carbon Quantum Dots for Dopamine Detection.

Authors:  D Bharathi; B Siddlingeshwar; R Hari Krishna; Vikram Singh; Nagaraju Kottam; Darshan Devang Divakar; Abdulaziz Abdullah Alkheraif
Journal:  J Fluoresc       Date:  2018-03-05       Impact factor: 2.217

3.  New insight into the selective photocatalytic oxidation of RhB through a strategy of modulating radical generation.

Authors:  Huijun Liang; Shengnan Liu; Hucheng Zhang; Xiaobing Wang; Jianji Wang
Journal:  RSC Adv       Date:  2018-04-11       Impact factor: 4.036

Review 4.  Early diagnosis of disease using microbead array technology: A review.

Authors:  Sanam Foroutan Parsa; Atieh Vafajoo; Azin Rostami; Reza Salarian; Mohammad Rabiee; Navid Rabiee; Ghazal Rabiee; Mohammadreza Tahriri; Amir Yadegari; Daryoosh Vashaee; Lobat Tayebi; Michael R Hamblin
Journal:  Anal Chim Acta       Date:  2018-05-04       Impact factor: 6.558

Review 5.  Multiplexed microarrays based on optically encoded microbeads.

Authors:  Atieh Vafajoo; Azin Rostami; Sanam Foroutan Parsa; Reza Salarian; Navid Rabiee; Ghazal Rabiee; Mohammad Rabiee; Mohammadreza Tahriri; Daryoosh Vashaee; Lobat Tayebi; Michael R Hamblin
Journal:  Biomed Microdevices       Date:  2018-08-07       Impact factor: 2.838

Review 6.  Metal Nanoparticles-Enhanced Biosensors: Synthesis, Design and Applications in Fluorescence Enhancement and Surface-enhanced Raman Scattering.

Authors:  Mohammad Tavakkoli Yaraki; Yen Nee Tan
Journal:  Chem Asian J       Date:  2020-09-21
  6 in total

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