Results 11 to 20 of about 5,100 (188)

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

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

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

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

Comparison of analytical sensitivity of SARS-CoV-2 molecular detection kits

International Journal of Infectious Diseases, 2021
Objectives: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has had a significant impact on global public health systems, making nucleic acid detection an important tool in epidemic prevention and control.
Jing Yang, Yanxi Han, Runling Zhang, Rui Zhang, Jinming Li   +4 more
doaj   +1 more source

Nanoisland SERS-Substrates for Specific Detection and Quantification of Influenza A Virus

Biosensors, 2023
Surface-enhanced Raman spectroscopy (SERS)-based aptasensors for virus determination have attracted a lot of interest recently. This approach provides both specificity due to an aptamer component and a low limit of detection due to signal enhancement by ...
Gleb Zhdanov, Alexandra Gambaryan, Assel Akhmetova, Igor Yaminsky, Vladimir Kukushkin, Elena Zavyalova   +5 more
doaj   +1 more source

Evaluation of Four Point of Care (POC) Antigen Assays for the Detection of the SARS-CoV-2 Variant Omicron

Microbiology Spectrum, 2022
Ensuring SARS-CoV-2 diagnostics that can reliably detect emerging variants has been an ongoing challenge. Due to the rapid spread of the Omicron variant, point-of-care (POC) antigen tests have become more widely used.
Justin Hardick, Nicholas Gallagher, Jaiprasath Sachithanandham, Amary Fall, Zishan Siddiqui, Andrew Pekosz, Yukari C. Manabe, Heba H. Mostafa   +7 more
doaj   +1 more source