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NMR spectroscopic studies of chitin oligomers - Resolution of individual residues and characterization of minor amide cis conformations.
Carbohydr Polym
March 2025
Department of Molecular Sciences, Swedish University of Agricultural Sciences, Almas Allé 5, Uppsala 75651, Sweden. Electronic address:
Chitin is the second most abundant biopolymer in nature after cellulose and is composed of N-acetylglucosamine (GlcNAc) connected via β(1 → 4)-glycosidic bonds. Despite its prominence in nature and diverse roles in pharmaceutical and food technological applications, there is still a need to develop methods to study structure and function of chitin and its corresponding oligomers. Efforts have been made to analyse chitin oligomers by NMR spectroscopy, but spectral overlap has prevented any differentiation between the interior residues.
View Article and Find Full Text PDF[Effect of somatic afferent nerve-visceral nerve circuit in the regulation of the gastrointestinal function with acupuncture and moxibustion].
Zhongguo Zhen Jiu
January 2025
Institute of Acupuncture and Moxibustion, Shandong University of TCM, Jinan 250355, China; Institute of Systematic Chinese Medicine, Shandong University of TCM, Jinan 250355, China.
The distribution of the common acupoints of acupuncture-moxibustion for gastrointestinal diseases conforms to the rule of the segmental homology of somatic afferent nerve-visceral nerve circuit at the spinal cord level. Acupuncture-moxibustion regulates the gastrointestinal function through the nerve-endocrine-immune system, and especially depending on the integrity of the structure and function of nervous system. The somatic afferent nerve-visceral nerve circuit plays an important role in the process of acupuncture and moxibustion for regulating the gastrointestinal function.
View Article and Find Full Text PDFEntropic Order Parameters for Categorical Symmetries in 2D-CFT.
Entropy (Basel)
December 2024
Instituto de Física Teórica, CSIC-Universidad Autónoma de Madrid, 28049 Madrid, Spain.
In this work, we propose an information theoretic order parameter able to characterize the presence and breaking of categorical symmetries in (1+1)-d rational conformal field theories (RCFTs). Specifically, we compute the quantum relative entropy between the ground states of RCFTs representing the critical point of phase transitions between different symmetry-broken phases of theories with categorical symmetries, and their symmetrized versions. We find that, at leading order in the high temperature limit, this relative entropy only depends on the expectation values of the quantum dimensions of the topological operators implementing the categorical symmetry.
View Article and Find Full Text PDFA unified neurocomputational model of prospective and retrospective timing.
Psychol Rev
January 2025
Department of Experimental Psychology, University of Groningen.
Time is a central dimension against which perception, action, and cognition play out. From anticipating when future events will happen to recalling how long ago previous events occurred, humans and animals are exquisitely sensitive to temporal structure. Empirical evidence seems to suggest that estimating time prospectively (i.
View Article and Find Full Text PDFTransitioning to residency: a qualitative study exploring residents' perspectives on strategies for adapting to residency.
BMC Med Educ
January 2025
Center for Education Development and Research in Health Professions (CEDAR), Lifelong Learning, Education and Assessment Research Network (LEARN), University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
Background: The transition to residency (TTR) goes along with new opportunities for learning and development, which can also be challenging, despite the availability of preparation courses designed to ease the transition process. Although the TTR highly depends on the organization, individual combined with organizational strategies that advance adaptation are rarely investigated. This study explores residents' strategies and experiences with organizational strategies to help them adapt to residency.
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