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JOURNAL ARTICLE
Line Karoui, Mourad Smari, Taoufik Mnasri
This study presents a comprehensive investigation of the structural and magnetic properties of La0.8 Sr0.2 Mn0.8 Co0.2 O3 (LS1, LS2 and LS3) compounds synthesized via the sol-gel method at different gelation temperatures through X-ray diffraction and different magnetic measurement techniques. The Rietveld refinement demonstrated that all samples exhibit a rhombohedral perovskite structure with the R 3̄ C space group. Their magnetic behavior, characterized through magnetization measurements, hysteresis loops, and Arrot plots, demonstrates a ferromagnetic-paramagnetic transition with notable soft ferromagnetic characteristics...
April 3, 2024: RSC Advances
#2
JOURNAL ARTICLE
Madeline J Lee, Izumi de Los Rios Kobara, Trisha R Barnard, Xariana Vales Torres, Nicole H Tobin, Kathie G Ferbas, Anne W Rimoin, Otto O Yang, Grace M Aldrovandi, Aaron J Wilk, Jennifer A Fulcher, Catherine A Blish
NK cells in the peripheral blood of severe COVID-19 patients exhibit a unique profile characterized by activation and dysfunction. Previous studies have identified soluble factors, including type I IFN and TGF-β, that underlie this dysregulation. However, the role of cell-cell interactions in modulating NK cell function during COVID-19 remains unclear. To address this question, we combined cell-cell communication analysis on existing single-cell RNA sequencing data with in vitro primary cell coculture experiments to dissect the mechanisms underlying NK cell dysfunction in COVID-19...
April 5, 2024: Journal of Immunology
#3
JOURNAL ARTICLE
Ashley N Battarbee, Sara M Sauer, Ayodeji Sanusi, Isabel Fulcher
BACKGROUND: Continuous glucose monitoring (CGM) has facilitated the evaluation of dynamic changes in glucose throughout the day and their effect on fetal growth abnormalities in pregnancy. However, studies of multiple CGM metrics combined and their association with other adverse pregnancy outcomes are limited. OBJECTIVE: Our goals were to 1) use machine-learning techniques to identify discrete glucose profiles based on weekly CGM metrics in pregnant individuals with pregestational diabetes and, 2) investigate their association with adverse pregnancy outcomes...
March 23, 2024: American Journal of Obstetrics and Gynecology
#4
JOURNAL ARTICLE
Iqra Saleem, Aafia Sheikh, Athar Yaseen Khan, Safeer Ahmed, Muhammad Abbas
Emergence of deep eutectic solvents as potential replacements for volatile organic solvents has attracted interest of the scientific community in diverse fields of applications. Compared to ionic liquids, which exhibit similarity in many respects with this new class of green solvents, deep eutectic solvents (DESs) show low toxicity, and are easy to prepare from cheap and abundantly available starting materials. Knowledge of physicochemical properties of DESs is a prerequisite for their safe applications in technological fields and to understand the nature of interactions present in these systems...
March 14, 2024: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
#5
JOURNAL ARTICLE
Abhinav Kumar Khorwal, Sujoy Saha, Alexey V Lukoyanov, Ajit K Patra
The present study examines the effect of Fe/Al concentration on the structural and magnetic properties of Mn-rich Mn50Fe25+xAl25-x (x = 5, 10, 15) Heusler alloys through x-ray diffraction, temperature- and field-dependent DC magnetization, thermoremanent magnetization, magnetic memory effect, AC susceptibility measurements, and DFT calculations. The samples crystallize in a cubic β-Mn structure. The trend shows a reduction in lattice parameters (unit cell volume) with the increasing Fe proportion. These alloys exhibit strong antiferromagnetic interactions with large frustration parameters, indicating the presence of competing magnetic interactions...
March 21, 2024: Journal of Chemical Physics
#6
JOURNAL ARTICLE
Vishnu Deo Mishra, G Pratap, Arun Roy
We report experimental investigations of a liquid crystal comprising thiophene-based achiral bent-core banana shaped molecules. The compound exhibits the following phase sequence on cooling: Isotropic (517.4 K), N (514.9 K), de Vries SmA (402 K), SmC. Practically no layer contraction was observed across the SmA to SmC transition, confirming the "de Vries" nature of the SmA phase. Interestingly, the crystallization does not occur on cooling the sample, unlike most other liquid crystals. Instead, the SmC phase undergoes a glass transition at 271 K even at a slow cooling rate...
February 2024: Physical Review. E
#7
JOURNAL ARTICLE
Nikolaos Patsalidis, George Papamokos, George Floudas, Vagelis Harmandaris
We present a detailed computational study on the temperature effect of the dynamics and the interfacial width of unentangled cis-1,4 polybutadiene linear chains confined between strongly attractive alumina layers via long, several μs, atomistic molecular dynamics simulations for a wide range of temperatures (143-473 K). We examine the spatial gradient of the translational segmental dynamics and of an effective local glass temperature (TgL). The latter is found to be much higher than the bulk Tg for the adsorbed layer...
March 14, 2024: Journal of Chemical Physics
#8
JOURNAL ARTICLE
Ieva Vanskeviče, Martynas Kinka, Jūras Banys, Jan Macutkevič, Sebastien Schaefer, Algirdas Selskis, Vanessa Fierro, Alain Celzard
This work presents the dielectric and ultrasonic properties of polydimethylsiloxane (PDMS) nanocomposites filled with titanium dioxide nanoparticles. The dielectric study was performed over a very broad range of frequencies (20 Hz-3 THz). The dielectric permittivity was almost frequency-independent in all the composites at room temperature over the whole range of measurement frequencies, and the dielectric losses were very low under these conditions (less than 2). The dielectric permittivity strongly increases with the nanoparticle concentration according to the Maxwell-Garnet model...
February 22, 2024: Polymers
#9
JOURNAL ARTICLE
Michelle Olakkengil, Samira Said, Omar Abdalla, Rachel Hofmann, Bethany Hedt-Gauthier, Isabel Fulcher
BACKGROUND: Although community health worker (CHW) programs focus on improving access to healthcare, some individuals may not receive the intended quality or quantity of an intervention. The objective of this research was to examine if certain populations of pregnant women differentially experience the implementation of a community health worker-led maternal health intervention in Zanzibar. METHODS: We included pregnant women enrolled in the Safer Deliveries (Uzazi Salama) program, which operated in 10 of 11 districts in Zanzibar, Tanzania between January 1, 2017, and June 19, 2019 (N = 33,914)...
March 7, 2024: BMC Pregnancy and Childbirth
#10
REVIEW
Rashmi Kumar, Kevin J Zemaitis, James M Fulcher, Ljiljana Paša-Tolić
Biological organisms are multifaceted, intricate systems where slight perturbations can result in extensive changes in gene expression, protein abundance and/or activity, and metabolic flux. These changes occur at different timescales, spatially across cells of heterogeneous origins, and within single-cells. Hence, multimodal measurements at the smallest biological scales are necessary to capture dynamic changes in heterogeneous biological systems. Of the analytical techniques used to measure biomolecules, mass spectrometry (MS) has proven to be a powerful option due to its sensitivity, robustness, and flexibility with regard to the breadth of biomolecules that can be analyzed...
March 2, 2024: Current Opinion in Biotechnology
#11
JOURNAL ARTICLE
Sara M Sauer, Isabel R Fulcher, Wilfredo R Matias, Ryan Paxton, Ahmed Elnaiem, Sean Gonsalves, Jack Zhu, Yodeline Guillaume, Molly Franke, Louise C Ivers
Routinely collected testing data has been a vital resource for public health response during the COVID-19 pandemic and has revealed the extent to which Black and Hispanic persons have borne a disproportionate burden of SARS-CoV-2 infections and hospitalizations in the United States. However, missing race and ethnicity data and missed infections due to testing disparities limit the interpretation of testing data and obscure the true toll of the pandemic. We investigated potential bias arising from these two types of missing data through a case study in Holyoke, Massachusetts during the pre-vaccination phase of the pandemic...
February 29, 2024: American Journal of Epidemiology
#12
JOURNAL ARTICLE
Rare SH2B3 coding variants in lupus patients impair B cell tolerance and predispose to autoimmunity.
Yaoyuan Zhang, Rhiannon Morris, Grant J Brown, Ayla May D Lorenzo, Xiangpeng Meng, Nadia J Kershaw, Pamudika Kiridena, Gaétan Burgio, Simon Gross, Jean Y Cappello, Qian Shen, Hao Wang, Cynthia Turnbull, Tom Lea-Henry, Maurice Stanley, Zhijia Yu, Fiona D Ballard, Aaron Chuah, James C Lee, Ann-Maree Hatch, Anselm Enders, Seth L Masters, Alexander P Headley, Peter Trnka, Dominic Mallon, Jeffery T Fletcher, Giles D Walters, Mario Šestan, Marija Jelušić, Matthew C Cook, Vicki Athanasopoulos, David A Fulcher, Jeffrey J Babon, Carola G Vinuesa, Julia I Ellyard
Systemic lupus erythematosus (SLE) is a heterogeneous autoimmune disease with a clear genetic component. While most SLE patients carry rare gene variants in lupus risk genes, little is known about their contribution to disease pathogenesis. Amongst them, SH2B3-a negative regulator of cytokine and growth factor receptor signaling-harbors rare coding variants in over 5% of SLE patients. Here, we show that unlike the variant found exclusively in healthy controls, SH2B3 rare variants found in lupus patients are predominantly hypomorphic alleles, failing to suppress IFNGR signaling via JAK2-STAT1...
April 1, 2024: Journal of Experimental Medicine
#13
Kevin J Zemaitis, James M Fulcher, Rashmi Kumar, David J Degnan, Logan A Lewis, Yen-Chen Liao, Marija Veličković, Sarah M Williams, Ronald J Moore, Lisa M Bramer, Dušan Veličković, Ying Zhu, Mowei Zhou, Ljiljana Paša-Tolić
BACKGROUND: The Human Proteome Project has credibly detected nearly 93% of the roughly 20,000 proteins which are predicted by the human genome. However, the proteome is enigmatic, where alterations in amino acid sequences from polymorphisms and alternative splicing, errors in translation, and post-translational modifications result in a proteome depth estimated at several million unique proteoforms. Recently mass spectrometry has been demonstrated in several landmark efforts mapping the human proteoform landscape in bulk analyses...
February 13, 2024: bioRxiv
#14
JOURNAL ARTICLE
Alexandros J Tsamopoulos, Zhen-Gang Wang
We construct a coarse-grained molecular dynamics model based on poly(ethylene oxide) and lithium bis(trifluoromethane)sulfonimide salt to examine the combined effects of temperature and salt concentration on the transport properties. Salt doping notably slows the dynamics of polymer chains and reduces ion diffusivity, resulting in a glass transition temperature increase proportional to the salt concentration. The polymer diffusion is shown to be well represented by a modified Vogel-Fulcher-Tamman (M-VFT) equation that accounts for both the temperature and salt concentration dependence...
February 23, 2024: ACS Macro Letters
#15
JOURNAL ARTICLE
Runguo Wu, Claire Williams, Junwen Zhou, Iryna Schlackow, Jonathan Emberson, Christina Reith, Anthony Keech, John Robson, Jane Armitage, Alastair Gray, John Simes, Colin Baigent, Borislava Mihaylova, Jane Armitage, Colin Baigent, Elizabeth Barnes, Lisa Blackwell, Rory Collins, Kelly Davies, Jonathan Emberson, Jordan Fulcher, Heather Halls, William G Herrington, Lisa Holland, Anthony Keech, Adrienne Kirby, Borislava Mihaylova, Rachel O'Connell, David Preiss, Christina Reith, John Simes, Kate Wilson, Michael Blazing, Eugene Braunwald, James de Lemos, Sabina Murphy, Terje R Pedersen, Marc Pfeffer, Harvey White, Stephen Wiviott, Michael Clearfield, John R Downs, Antonio Gotto, Stephen Weis, Bengt Fellström, Hallvard Holdaas, Alan Jardine, Terje R Pedersen, David Gordon, Barry Davis, Curt Furberg, Richard Grimm, Sara Pressel, Jeffrey L Probstfield, Mahboob Rahman, Lara Simpson, Michael Koren, Björn Dahlöf, Ajay Gupta, Neil Poulter, Peter Sever, Hans Wedel, Robert H Knopp, Stuart Cobbe, Bengt Fellström, Hallvard Holdaas, Alan Jardine, Roland Schmieder, Faiez Zannad, D John Betteridge, Helen M Colhoun, Paul N Durrington, John Fuller, Graham A Hitman, Andrew Neil, Eugene Braunwald, Barry Davis, C Morton Hawkins, Lemuel Moyé, Marc Pfeffer, Frank Sacks, John Kjekshus, Hans Wedel, John Wikstrand, Christoph Wanner, Vera Krane, Maria Grazia Franzosi, Roberto Latini, Donata Lucci, Aldo Maggioni, Roberto Marchioli, Enrico B Nicolis, Luigi Tavazzi, Gianni Tognoni, Jackie Bosch, Eva Lonn, Salim Yusuf, Jane Armitage, Louise Bowman, Rory Collins, Anthony Keech, Martin Landray, Sarah Parish, Richard Peto, Peter Sleight, John Jp Kastelein, Terje R Pedersen, Robert Glynn, Antonio Gotto, John Jp Kastelein, Wolfgang Koenig, Jean MacFadyen, Paul M Ridker, Anthony Keech, Stephen MacMahon, Ian Marschner, Andrew Tonkin, John Shaw, John Simes, Harvey White, Patrick W Serruys, Genell Knatterud, Gerard J Blauw, Stuart Cobbe, Ian Ford, Peter Macfarlane, Chris Packard, Naveed Sattar, James Shepherd, Stella Trompet, Eugene Braunwald, Christopher P Cannon, Sabina Murphy, Rory Collins, Jane Armitage, Louise Bowman, Richard Bulbulia, Richard Haynes, Sarah Parish, Richard Peto, Peter Sleight, Pierre Amarenco, K Michael Welch, John Kjekshus, Terje R Pedersen, Lars Wilhelmsen, Philip Barter, Antonio Gotto, John LaRosa, John Jp Kastelein, James Shepherd, Stuart Cobbe, Ian Ford, Sharon Kean, Peter Macfarlane, Chris Packard, Michele Roberston, Naveed Sattar, James Shepherd, Robin Young, Hiroyuki Arashi, Robert Clarke, Marcus Flather, Shinya Goto, Uri Goldbourt, Jemma Hopewell, G Kees Hovingh, George Kitas, Connie Newman, Marc S Sabatine, Gregory G Schwartz, Liam Smeeth, Jonathan Tobert, John Varigos, Junichi Yamamguchi
BACKGROUND: UK cardiovascular disease (CVD) incidence and mortality have declined in recent decades but socioeconomic inequalities persist. AIM: To present a new CVD model, and project health outcomes and the impact of guideline-recommended statin treatment across quintiles of socioeconomic deprivation in the UK. DESIGN AND SETTING: A lifetime microsimulation model was developed using 117 896 participants in 16 statin trials, 501 854 UK Biobank (UKB) participants, and quality-of-life data from national health surveys...
February 19, 2024: British Journal of General Practice
#16
JOURNAL ARTICLE
David Gallagher, Daire J Hurley, Brian O'Tuama, Emily Hughes, Tim Fulcher
SIGNIFICANCE: We evaluate the relationship between tear film osmolarity measurements and quality of vision in patients presenting for routine eye clinic appointments. We found that the hyperosmolar group (>316 mOsm/L) had a worse quality-of-vision score than the normal osmolarity group, with glare being the most problematic symptom. PURPOSE: Quality of vision is a perception and measure of real-world vision, which is not measured routinely in a clinical setting...
January 1, 2024: Optometry and Vision Science: Official Publication of the American Academy of Optometry
#17
JOURNAL ARTICLE
Jintian Luo, Yuhang Luo, Ben Tong, Houkuan Tian, Yuhui Yang, Biao Zuo
The dynamics of polymer nanocomposites varies depending on the physics and chemistry at the polymer-nanoparticle interface. The physical aging of the nanocomposites is accelerated or retarded based on interfacial interactions and the state of polymer adsorption at the interfaces. In this study, we investigated the aging kinetics of silica-polystyrene nanocomposites using differential scanning calorimetry, focusing on the effect of local conformations of chains adsorbed on the nanofiller surface. The results show that the temperature dependence of the aging rate follows a Vogel-Fulcher-Tammann relationship at high temperatures, whereas it exhibits an Arrhenius-like behavior below a characteristic temperature (Tc)...
February 14, 2024: Journal of Chemical Physics
#18
JOURNAL ARTICLE
Grace Anne McCabe, Liam Tomás Mulcahy, Niall Mulligan, Tim Fulcher
PURPOSE: To report the margin control process and rate of recurrence of periocular basal cell carcinomas (BCCs) managed by en-face, frozen section margin controlled (FSC), excision by a single surgeon with a 3-year follow-up. METHODS: A retrospective analysis of all histopathologically proven cases of periocular BCC who underwent surgical excision with intra-operative, en-face, FSC, excision by a single surgeon from 2015 to 2019 was performed. Patients with less than 3-year follow-up were offered a virtual appointment to determine possible recurrence...
January 30, 2024: Irish Journal of Medical Science
#19
JOURNAL ARTICLE
Aafia Sheikh, Athar Yaseen Khan, Safeer Ahmed
Deep eutectic solvents (DESs) are considered to play an important role in green chemistry and other technological fields as an alternative to organic solvents. The present study reports measurements of density (ρ), speed of sound (u), dynamic viscosity (η), and electrical conductivity (κ) and investigates physicochemical properties of choline chloride/acetic acid (ChCl/AcA DES) and its binary mixtures with dimethyl sulfoxide (DMSO) over the entire composition and temperature (298.15-353.15 K) range...
January 23, 2024: ACS Omega
#20
JOURNAL ARTICLE
Hiroki Nobori, Daisuke Fujimoto, Jun Yoshioka, Koji Fukao, Takashi Konishi, Ken Taguchi
We investigate the phase-transition behavior of ionic liquid crystals, namely 1-methyl-3-alkylimidazolium tetrafluoroborate, [Cnmim]BF4, confined in cylindrical nanopores using differential scanning calorimetry, x-ray scattering, and dielectric relaxation spectroscopy. Here, n is the number of carbon atoms in the alkyl part of this ionic liquid crystal. For n = 10 and 12, the isotropic liquid phase changes to the smectic phase and then to a metastable phase for the cooling process. During the subsequent heating process, the metastable phase changes to the isotropic phase via crystalline phases...
January 28, 2024: Journal of Chemical Physics
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