Results 11 to 20 of about 93,515 (281)

Limit of detection (LoD) of SARS-CoV-2 using RT- qPCR with an commercial kit - retesting needed or not?

Clinical chemistry and laboratory medicine, 2023
BACKGROUND-AIM. Real-time reverse transcriptase- polymerase chain reaction (RT-qPCR) is current the gold standard for qualitative detection of SARS- CoV-2 in nasopharyngeal (NP) and/or oropharyngeal (OP) swabs. Aim of the study was to determine proper limit of detection (LoD) and base treshold value (Ct value) to correctly distinguish positive from ...
Kardum Paro, Mirjana Mariana, Tkalčić Švabek, Željka, Horvat, Martina, Parašilovac, Nikolina   +3 more
openaire   +2 more sources

Determination of sensitivity limit in quantative analysis of polycyclic aromatic hydrocarbons by Gc-ms [PDF]

Acta Periodica Technologica, 2004
The limit of detection (LOD) and the limit of quantitation (LOQ) for 16 individual PAHs from the Environmental Protection Agency (EPA) list (naphthalene, acenaphthylene, acenaphtene, fluorene, phenanthrene antrachene, fluoranthene, pyrene, benzo(a ...
Marjanović Nikola J., Kravić Snežana Ž., Suturović Zvonimir J., Švarc-Gajić Jaroslava V.   +3 more
doaj   +1 more source

0299 The NIEHS GuLF STUDY: Recalculation of exposure measurement data between the limit of detection (LOD) reported by the laboratory and the analytical methods’ LODs [PDF]

Occupational and Environmental Medicine, 2014
Objectives BP contractors collected nearly 25 000 personal passive dosimeter samples (about 150 000 individual exposure measurements, primarily benzene, ethylbenzene, toluene, xylene and total hydrocarbon (THC)), related to the response and cleanup of the Deepwater Horizon oil spill.
Mark Stenzel, Patricia Stewart, Aaron Blair, Lawrence Engel, Richard Kwok, Dale Sandler   +5 more
openaire   +1 more source

Measurement of methionine level with the LC-ESI-MS/MS method in schizophrenic patients [PDF]

The Ukrainian Biochemical Journal, 2016
The purpose of this study was to evaluate plasma methionine levels by using liquid chromatography electrospray ionization-tandem mass spectroscopy (LC-ESI-MS/MS) in schizophrenic patients.
S. Kulaksizoglu, B. Kulaksizoglu, H. Y. Ellidag, E. Eren, N. Yilmaz, A. Baykal   +5 more
doaj   +1 more source

Limit of Detection (LOD), lower and upper limit of quantification (LLOQ and ULOQ, respectively)*.

, 2023
Limit of Detection (LOD), lower and upper limit of quantification (LLOQ and ULOQ, respectively)*.
Ivana Beesham (9215217), Ishen Seocharan (12902312), Mags Beksinska (3141801), Yusentha Balakrishna (5797361), Joanne Batting (12770286), Pai-Lien Chen (565932), Sigcinile Dlamini (17696894), Chanel Avenant (409756), Salndave B. Skosana (17696891), Johnson Mosoko Moliki (17696897), Jenni Smit (325817), Mandisa Singata-Madliki (14137326), Alexis J. Bick (5146736), Donita Africander (565922), Janet P. Hapgood (409759), G. Justus Hofmeyr (11134927), Karl-Heinz Storbeck (3152742)   +16 more
core   +1 more source

Integrated Microfluidic Preconcentration and Nucleic Amplification System for Detection of Influenza A Virus H1N1 in Saliva

Micromachines, 2020
Influenza A viruses are often present in environmental and clinical samples at concentrations below the limit of detection (LOD) of molecular diagnostics.
Yonghee Kim, Abdurhaman Teyib Abafogi, Buu Minh Tran, Jaewon Kim, Jinyeop Lee, Zhenzhong Chen, Pan Kee Bae, Kyoungsook Park, Yong-Beom Shin, Danny van Noort, Nae Yoon Lee, Sungsu Park   +11 more
doaj   +1 more source

Ultrasensitive detection of SARS-CoV-2 nucleocapsid protein using large gold nanoparticle-enhanced surface plasmon resonance

Scientific Reports, 2022
The COVID-19 pandemic has created urgent demand for rapid detection of the SARS-CoV-2 coronavirus. Herein, we report highly sensitive detection of SARS-CoV-2 nucleocapsid protein (N protein) using nanoparticle-enhanced surface plasmon resonance (SPR ...
Taka-aki Yano, Taira Kajisa, Masayuki Ono, Yoshiya Miyasaka, Yuichi Hasegawa, Atsushi Saito, Kunihiro Otsuka, Ayuko Sakane, Takuya Sasaki, Koji Yasutomo, Rina Hamajima, Yuta Kanai, Takeshi Kobayashi, Yoshiharu Matsuura, Makoto Itonaga, Takeshi Yasui   +15 more
doaj   +1 more source

Limit of detection (LOD) in nonlinear concentration-response curves, with application in in-vitro mutagenicity assays

, 2021
Different-shaped nonlinear concentration-response curves of various in-vitro assays can be compared by their limit of detection (LOD). To estimate an effective dose (as LOD), a nonlinear model fit and the intercept of its prediction limit with concentration 0 is used.
Hothorn, L.A., Spiliotopoulos, D., Marin-Kuan, M., Ritz, Ch.   +3 more
openaire   +2 more sources

A Combined Near-Infrared and Mid-Infrared Spectroscopic Approach for the Detection and Quantification of Glycine in Human Serum

Sensors, 2022
Serum is an important candidate in proteomics analysis as it potentially carries key markers on health status and disease progression. However, several important diagnostic markers found in the circulatory proteome and the low-molecular-weight (LMW ...
Thulya Chakkumpulakkal Puthan Veettil, Bayden R. Wood   +1 more
doaj   +1 more source

Development, Validation and Application of a Novel UHPLC-UV Method for the Simultaneous Determination of Valsartan and Nifedipine in the New Formulation of Self-Nanoemulsifying Drug Delivery Systems

Separations, 2022
Our objective is to develop a robust method to quantify valsartan (VAL) and nifedipine (NIF) in developed a self-nanoemulsifying drug delivery formulation.
Md Abdur Rashid, Mohammad Bilani, Gamal Shazly, Mohsin Kazi   +3 more
doaj   +1 more source