Most alignment media for the residual dipolar coupling (RDC) based molecular structure determination of small organic compounds consist of rod-like polymers dissolved in organic solvents or of swollen cross-linked polymer gels. Thus far, the synthesis of polymer-based alignment media has been a challenging process, which is often followed by a time-consuming sample preparation. We herein propose the use of non-polymeric alignment media based on benzenetricarboxamides (BTAs), which self-assemble into rod-like supramolecules. Our newly found supramolecular lyotropic liquid crystals (LLCs) are studied in terms of their LLC properties and their suitability as alignment media in NMR spectroscopy. Scalable enantiodifferentiating properties are introduced through a sergeant-and-soldier principle by blending achiral with chiral substituted BTAs.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1002/anie.201705642 | DOI Listing |
J Med Internet Res
January 2025
Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, MA, United States.
Background: Twitter (subsequently rebranded as X) is acknowledged by US health agencies, including the US Centers for Disease Control and Prevention (CDC), as an important public health communication tool. However, there is a lack of data describing its use by state health agencies over time. This knowledge is important amid a changing social media landscape in the wake of the COVID-19 pandemic.
View Article and Find Full Text PDFViral Immunol
January 2025
Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia.
People living with HIV (PLWH) beginning antiretroviral therapy (ART) retain a high burden of cytomegalovirus (CMV). CMV has been implicated in atherosclerosis in healthy adults, and a role in PLWH is plausible. Atherosclerosis has also been linked with γδ T cells and CMV seropositivity with altered γδ T cell profiles in other populations.
View Article and Find Full Text PDFAsian J Psychiatr
December 2024
Department of Nursing, Namazi Hospital, Shiraz University of Medical Sciences, Shiraz, Iran.
This review, in light of the Socio-Cultural Erosion Theory, addresses the alarming deterioration in mental health among Iranian youth. According to this theory, rapid socio-cultural changes, economic instability, and pervasive influences of digital media create a drift between traditional values and modern expectations that are detrimental to mental health. The major risk factors identified in order of significance were, in descending order, economic hardship, academic stress, cultural pressures, and digital exposure.
View Article and Find Full Text PDFSci Rep
December 2024
Communication University of China, State Key Laboratory of Media Convergence and Communication, Beijing, 100024, China.
Knowledge distillation improves student model performance. However, using a larger teacher model does not necessarily result in better distillation gains due to significant architecture and output gaps with smaller student networks. To address this issue, we reconsider teacher outputs and find that categories with strong teacher confidence benefit distillation more, while those with weaker certainty contribute less.
View Article and Find Full Text PDFAcad Radiol
December 2024
Department of Radiological Sciences, University of California Irvine, Orange, CA 92868. Electronic address:
Background: Multidose iodinated contrast media (ICM) injectors have shown promise in reducing ICM waste. This study aims to evaluate the impact of patient volume on ICM waste reduction in multidose injectors.
Methods: CT studies performed over one-year period with a multidose injector at our emergency CT unit.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!