Spaceflight-induced changes in white matter hyperintensity burden in astronauts

Conclusions: Long-duration exposure to microgravity is associated with an increase in periventricular WMH in astronauts. This increase was linked to an increase in ventricular CSF volume documented in ISS astronauts. There was no associated change in or abnormal levels of WMH volumes in deep white matter as reported in U-2 high-altitude pilots.
Source: Neurology - Category: Neurology Authors: Tags: MRI, Volumetric MRI, Case control studies ARTICLE Source Type: research

Related Links:

Publication date: Available online 21 October 2018Source: Journal of Photochemistry and Photobiology A: ChemistryAuthor(s): Sampurnam S., Muthamizh S., Dhanasekaran T., Latha D., Padmanaban A., Selvam P., Stephen A., Narayanan V.AbstractHeteropolyacid supported ZrO2 nanocomposites has been prepared through wet impregnation method with the intention to improve the photodegradation performance under UV light. The material consist of mixed monoclinic and cubic ZrO2 phase and orthorhombic Keggin type 12- phosphotungstic acid(PTA) with different ratios. The phase structure, chemical composition and oxidation state of the elemen...
Source: Journal of Photochemistry and Photobiology A: Chemistry - Category: Chemistry Source Type: research
Publication date: Available online 21 October 2018Source: Journal of Energy ChemistryAuthor(s): Pingping Zuo, Shijie Qu, Wenzhong ShenAbstractAsphaltenes, complex aromatic compounds from various carbonaceous sources, could be obtained by solvent dissolution, filtration and adsorption. It was difficult to clarify the molecular structures and chemical properties of asphaltene due to its structural similarity, composition complexity and source dependences. Many techniques, like Mass spectrometry, Chromatography, Nuclear magnetic resonance spectroscopy, Infrared spectroscopy, Roman spectroscopy, Fluorescence spectroscopy, X-ra...
Source: Journal of Energy Chemistry - Category: Chemistry Source Type: research
Publication date: Available online 21 October 2018Source: Journal of Electroanalytical ChemistryAuthor(s): Ruipeng Yu, Haifeng Zhou, Mengyuan Li, Qijun SongAbstract3-Methylindole (3-MI) is a recalcitrant and toxic substance that can cause damages to human and animal lung cells and may have a pronounced effect on mood and stress levels. Rapid and sensitive detection of 3-MI is therefore of great important for its environmental safety evaluation. A novel electrochemical sensor for the determination of 3-MI was fabricated based on electropolymerization of molecular imprinted polymer (MIP) film on a glassy carbon electrode (GC...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
Publication date: 15 February 2019Source: Journal of Alloys and Compounds, Volume 775Author(s): E.P. Skipetrov, B.B. Kovalev, L.A. Skipetrova, A.V. Knotko, V.E. SlynkoAbstractWe synthesize a single-crystal Pb1-x-ySnxFeyTe (x = 0.08, y = 0.01) ingot and investigate the distributions of tin and iron along it, as well as the galvanomagnetic properties of samples cut from the ingot (4.2 K ≤ T ≤ 300 K, B ≤ 0.07 T). The scanning electron microscopy reveals microscopic inclusions with a reduced lead-tin content enriched with iron in a number of samples, indicating that the solubility limit of ir...
Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
ConclusionIntraoperative CT is an effective tool to prevent reoperation in AIS surgery for incorrect screw placement. Despite high volume, experience, and specialty training, incorrect trajectories occur and systems should be in place for preventable error.Level of EvidenceLevel II.
Source: Spine Deformity - Category: Orthopaedics Source Type: research
Authors: Ramos-Zayas Y, Franco-Molina MA, Hernádez-Granados AJ, Zárate-Triviño DG, Coronado-Cerda EE, Mendoza-Gamboa E, Zapata-Benavides P, Ramírez-Romero R, Santana-Krymskaya SE, Tamez-Guerra R, Rodríguez-Padilla C Abstract Exosomes secreted by tumor cells are a good source of cellular components that stimulate the immune response, such as alarmins (mRNA, tetraspanins (CD9, CD63, CD81), heat-shock proteins, major histocompatibility complex class I molecules) and tumor-associated antigens. These properties permit to pulsed dendritic cells in the immunotherapy for many cancers type...
Source: Immunopharmacology and Immunotoxicology - Category: Allergy & Immunology Tags: Immunopharmacol Immunotoxicol Source Type: research
ConclusionBoth the techniques cause an increase in canine retraction in short period of time with almost no harm to periodontal structures. MOP being a flapless procedure allow clinicians to deliver an efficient orthodontic care.
Source: The Saudi Dental Journal - Category: Dentistry Source Type: research
CONCLUSIONS: This study provides a novel insight into the association of Streptococcus gallolyticus subspecies pasteurianus with HCC. The isolation of the organism from blood and ascitic fluid should prompt the clinicians to search for evidence of HCC actively. PMID: 30332912 [PubMed - as supplied by publisher]
Source: Scandinavian Journal of Gastroenterology - Category: Gastroenterology Tags: Scand J Gastroenterol Source Type: research
Abstract Highly graphitic nanoporous carbon (NPC) was obtained from an agricultural waste-citrus peel at optimum condition. Then, a low-cost and pore size-controlled magnetic graphitic nanoporous carbon (MNPC) with ultrahigh specific surface area (1064 m2 g-1) was successfully fabricated by coprecipitation of Fe3O4 particles onto NPC. The prepared MNPC was characterized by Brunauer-Emmett-Teller (BET), Raman spectrum, scanning electron microscope (SEM) and Fourier transform infrared spectrometry (FT-IR). BET results showed a significant increase in the micropores volume and specific surface area of MNPCs follo...
Source: Analytica Chimica Acta - Category: Chemistry Authors: Tags: Anal Chim Acta Source Type: research
Publication date: Available online 20 October 2018Source: LWTAuthor(s): Yu Shen, Sijia Zhao, Xiaoduo Zhao, Hongyang Sun, Meili Shao, Honghua XuAbstractAcrylamide (AA), a toxin that primarily exists in fried food, causes neurotoxicity, genetic toxicity, genetic mutations, and DNA damage. The present study aimed to elucidate the mechanisms by which lactic acid bacteria (LAB) adsorb AA. LAB cells were characterized via scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDS), transcription electron microscopy (TEM), Brunauer-Emmett-Teller (BET) technique, and atomic force microscopy (AFM). Acry...
Source: LWT Food Science and Technology - Category: Food Science Source Type: research
More News: Brain | Neurology | PET Scan | Study