Results 21 to 30 of about 178,057 (307)

A colorimetric assay using tetrazolium salts with an electron mediator to evaluate yeast growth in opaque dispersed systems [PDF]

, 2018
Background: traditional microbiological enumeration techniques such as colony count are time consuming. Visual evaluation of turbidity growth lacks objectivity and precision.
Zalazar, Aldana Lourdes, González, Malena Mariana, Gliemmo, María Fernanda, Carmen Adriana Campos, Campos, Carmen Adriana, María Fernanda Gliemmo, Aldana Lourdes Zalazar, Malena Mariana González   +7 more
core   +1 more source

Determination of Oseltamivir Quality by Colorimetric and Liquid Chromatographic Methods

Emerging Infectious Diseases, 2008
We developed a colorimetric and chromatographic assay for oseltamivir to assess the authenticity of Tamiflu (F. Hoffmann-La Roche Ltd., Basel, Switzerland) because of a growing concern about counterfeit oseltamivir. The colorimetric assay is quantitative
Michael D. Green, Henry Nettey, Robert A. Wirtz   +2 more
doaj   +1 more source

Colorimetric focus-forming assay with automated focus counting by image analysis for quantification of infectious hepatitis C virions. [PDF]

PLoS ONE, 2012
Hepatitis C virus (HCV) infection is the leading cause of liver transplantation in Western countries. Studies of HCV infection using cell culture-produced HCV (HCVcc) in vitro systems require quantification of infectious HCV virions, which has ...
Wonseok Kang, Eui-Cheol Shin
doaj   +1 more source

Fabrication methods for a gel-based separation-free device for whole blood glucose detection

MethodsX, 2021
In this paper, we describe two fabrication methods (well array-based and biopsy punching-based) of gel disks to construct a gel-based point-of-care (POC) diagnosis device for direct colorimetric measurement of human whole blood glucose without any extra ...
Han Zhang, Yongjian Yang, Jing Dai, Arum Han   +3 more
doaj   +1 more source

Phenosafranin-Based Colorimetric-Sensing Platform for Nitrite Detection Enabled by Griess Assay

Sensors, 2020
A facile and effective colorimetric-sensing platform based on the diazotization of phenosafranin for the detection of NO 2 − under acidic conditions using the Griess assay is presented. Diazotization of commercial phenosafranin produces
Jingzhou Hou, Huixiang Wu, Xin Shen, Chao Zhang, Changjun Hou, Qiang He, Danqun Huo   +6 more
doaj   +1 more source

Optical assay for biotechnology and clinical diagnosis [PDF]

, 2011
In this paper, we present an optical diagnostic assay consisting of a mixture of environmental-sensitive fluorescent dyes combined with multivariate data analysis for quantitative and qualitative examination of biological and clinical samples.
Piletsky, Sergey, Meglinski, Igor V., Moczko, Ewa, I. Meglinski, S. Piletsky, Turner, Claire, Piletsky, Sergey A., M. Cauchi, Cauchi, Michael, E. Moczko, C. Turner, Meglinski, Igor   +11 more
core   +1 more source

Comparison of chemiluminescence enzyme immunoassay based on magnetic microparticles with traditional colorimetric ELISA for the detection of serum α-fetoprotein

Journal of Pharmaceutical Analysis, 2012
A chemiluminescence enzyme immunoassay based on magnetic microparticles (MmPs-CLEIA) was developed to evaluate serum α-fetoprotein (AFP) in parallel with traditional colorimetric enzyme-linked immunosorbent assay (ELISA). A systematic comparison between
Qian-Yun Zhang, Hui Chen, Zhen Lin, Jin-Ming Lin   +3 more
doaj   +1 more source

Au-NP-based colorimetric assay for sugar detection and quantification

Sensors and Actuators Reports, 2023
Sugars have been associated with health problems such as metabolic syndrome, obesity, elevated triglycerides, and other features of metabolic disorders.
Mawin JM Jimenez, Andres Jaramillo-Botero, Alba Avila   +2 more
doaj   +1 more source

Colorimetric methods for rapid determination of pyrazinamide resistance

International Journal of Mycobacteriology, 2020
Background: Because pyrazinamide (PZA) is only effective for Mycobacterium tuberculosis at an acidic pH, susceptibility tests are more difficult to perform than those for other anti-tuberculosis (TB) drugs.
Ahmet Ugur Akbal, Belma Durupinar, Ahmet Yilmaz Coban   +2 more
doaj   +1 more source

Low-cost rapid detection of rifampicin resistant tuberculosis using bacteriophage in Kampala, Uganda. [PDF]

, 2007
BACKGROUND: Resistance to anti-tuberculosis drugs is a serious public health problem. Multi-drug resistant tuberculosis (MDR-TB), defined as resistance to at least rifampicin and isoniazid, has been reported in all regions of the world.
Traore, Hamidou, Hamidou Traore, Jones-Lopez, Edward C, McNerney, Ruth, Eisenach Kathleen D, Joloba, Moses L, Jones-Lopez Edward C, Roy D Mugerwa, Smith, Peter G, Mugerwa, Roy D, Ogwang Sam, Smith Peter G, Moses L Joloba, Mallard, Kim, Kathleen D Eisenach, Jerrold J Ellner, Ellner, Jerrold J, Eisenach, Kathleen D, Ogwang, Sam, Mugerwa Roy D, Kayes, Susan, McNerney Ruth, Edward C Jones-Lopez, Kalpana Narayan, Ruth McNerney, Peter G Smith, Sam Ogwang, Susan Kayes, Joloba Moses L, Narayan, Kalpana, Francis Mumbowa, Narayan Kalpana, Ellner Jerrold J, Mumbowa, Francis, Kayes Susan, Kim Mallard, Traore Hamidou, Mumbowa Francis, Mallard Kim   +38 more
core   +1 more source