N-Deacetylated hyaluronan (daHA) has been widely investigated as a starting material to develop biomaterials with unique composition and performance. However, its structure elucidation remains a challenging task due to its polysaccharide nature. After the brief mention of its properties and preparation, this review critically evaluates different analytical methods and approaches to characterize this promising polysaccharide. A special attention is paid to the determination of the degree of deacetylation. Besides, the analysis of its molecular weight, primary structure, and deacetylation pattern is also described. The older procedures are compared with the advanced techniques to provide reliable description of daHA.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/j.carbpol.2020.116720 | DOI Listing |
BMC Med Res Methodol
December 2024
School of Mathematical & Statistical Sciences, University of Texas Rio Grande Valley, One West University Boulevard, Brownsville, TX, 78520, USA.
Background: Missing observations within the univariate time series are common in real-life and cause analytical problems in the flow of the analysis. Imputation of missing values is an inevitable step in every incomplete univariate time series. Most of the existing studies focus on comparing the distributions of imputed data.
View Article and Find Full Text PDFPDA J Pharm Sci Technol
December 2024
Division of Microbiology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR.
In pharmaceutical manufacturing, benefit is conferred in detection of specified microorganism (i.e., Burkholderia cepacia complex (BCC), E.
View Article and Find Full Text PDFMol Phylogenet Evol
December 2024
Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ, USA.
Species relationships and speciation have traditionally been represented by phylogenetic trees, but not all evolutionary histories fit into bifurcating divergence models. Introgressive hybridization challenges this assumption by sometimes [or maybe often] leading to mitochondrial introgression, wherein one species' mitochondrial genome is entirely replaced by another's (mitochondrial capture). Such processes result in mitonuclear discrepancies, complicating species delimitation and phylogenetic inference.
View Article and Find Full Text PDFClin Chim Acta
December 2024
Newborn Screening, Clinical Biochemistry and Clinical Pharmacy Laboratory, Meyer Children's Hospital IRCCS, 50139 Florence, Italy; Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, 50139 Florence, Italy. Electronic address:
Background: Pyridoxine-dependent epilepsy (PDE) is a rare inborn error of lysine metabolism. To date, diagnosis of PDE relies on the quantification of α-AminoAdipic SemiAldehyde (α- AASA), Piperideine-6-Carboxylate (P6C) and Pipecolic acid (PA) in urine or plasma from patients with overt symptoms. However, these biomarkers are not specific, and their biochemical analysis is challenged by their instability and technical limitations.
View Article and Find Full Text PDFClin Chim Acta
December 2024
Unilabs Group, Geneva, Switzerland. Electronic address:
Background: Alternative means of blood sampling continue to grow due to the scarcity of phlebotomists and the need for person-centered care. It is crucial to consistently support these alternative blood sampling innovations with scientific evidence to guarantee the quality of care, especially when implementing for instance Lateral Upper-arm Blood Collection (LUBC) for non-trained professionals at home. Knowledge gaps remain in how to quantify imprecision introduced by the collection method and its impact on clinical use.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!