Results 111 to 120 of about 131,127 (291)

Performance Comparison between Semi‐Automated and Manual Cell Counting for Animal Cell Culture

open access: yesChemie Ingenieur Technik, EarlyView.
Following ISO 20391‐2:2019 guidelines, manual and semi‐automated cell counting performances were compared using validation parameters from ICH Q2(R1). Specificity, linearity, and repeatability served as key validation parameters in the evaluation of total cell density and cell viability of CHO‐K1 cells using trypan blue exclusion staining.
Selina Uhlendorff   +3 more
wiley   +1 more source

Analysis of magnetic resonance contrast agent entrapment following reversible electroporation in vitro

open access: yesRadiology and Oncology
Administering gadolinium-based contrast agent before electroporation allows the contrast agent to enter the cells and enables MRI assessment of reversibly electroporated regions.
Strucic Marko   +5 more
doaj   +1 more source

Chemical engineering as an essential element of industrial biotechnology in Mexico: New aims in research and university education

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract On the centennial of higher education in Chemical Engineering in Mexico, it is pertinent to revisit the key stages that have contributed to its consolidation as a vital discipline for the nation's scientific and technological advancement. Although the initial mission of chemical engineering education was primarily oriented toward the training ...
Agustín López Munguía   +3 more
wiley   +1 more source

Identifizierung und Charakterisierung eines neuen Bindeproteins für zyklische Nukleotide [PDF]

open access: yes, 2007
Cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate are important intracellular messengers. Binding of cyclic nucleotides controls the activity of protein kinases, ion channels and guanine-nucleotide-exchange factors in many cells ...
Debowski, Katharina
core  

Interpretation of in vitro concentration‐response data for risk assessment and regulatory decision‐making: Report from the 2022 IWGT quantitative analysis expert working group meeting

open access: yesEnvironmental and Molecular Mutagenesis, EarlyView.
Abstract Quantitative risk assessments of chemicals are routinely performed using in vivo data from rodents; however, there is growing recognition that non‐animal approaches can be human‐relevant alternatives. There is an urgent need to build confidence in non‐animal alternatives given the international support to reduce the use of animals in toxicity ...
Marc A. Beal   +14 more
wiley   +1 more source

The In Vitro Transgenic Rodent Assay in Primary MutaMouse Hepatocytes Compared to the Mammalian Cell Gene Mutation Assay Using the HPRT Gene

open access: yesEnvironmental and Molecular Mutagenesis, EarlyView.
ABSTRACT Gene mutations can be detected in mammalian cells in vitro using indicator genes such as the hypoxanthine‐guanine‐phosphoribosyltransferase (HPRT) gene. These assays have been adopted as OECD test guidelines (TG, e.g., OECD TG no. 476) and are used for regulatory purposes.
Alina Göpfert   +5 more
wiley   +1 more source

Study of Ultraviolet-Induces Chromatid and Chromosome Aberrations as a Function of Dose in G1 Phase Vertebrate Tissue Cultures [PDF]

open access: yes, 1976
G1 phase A8 Xenopus laevis (toad) and V79B Cricetulus griseus (hamster) tissue cultures were used to observe the frequency of ultraviolet-induced chromosomal aberrations as a function of dose.
Griggs, H. Gaston, Orr, Troy V.
core   +2 more sources

Mechanisms of SCN2A loss of function do not predict presence or phenotype of epilepsy

open access: yesEpilepsia, EarlyView.
Abstract Objective SCN2A loss‐of‐function (LoF) variants are associated with epilepsy (onset age ≥ 3 months), intellectual disability (ID), and autism spectrum disorder (ASD). Despite numerous identified variants and the description of phenotypic subgroups, relationships between Nav1.2 channel dysfunction and clinical phenotypes remain unclear.
Marsha Tan   +23 more
wiley   +1 more source

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