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Evaluation of leaching characteristic and kinetic study of lithium from lithium aluminum silicate glass-ceramics by NaOH

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Journal of Environmental Sciences 2021年第9期33卷 98-110页

作者： dongseok lee Sung-Ho Joo Dong Ju Shin Shun Myung Shin Resources Recovery Research Center Korea Institute of Geoscience and Mineral Resources(KIGAM)124 Gwahak-roYuseong-guDaejeon 34132Republic of Korea Department of Resources Recycling University of Science and Technology(UST)217Gajeong-roYuseong-guDaejeon 34113Republic of Korea

The behavior and mechanism of Li leaching from lithium aluminum silicate glass-ceramics which can be used as a secondary source of Li using aqueous NaOH solution was *** Li leaching efficiency is increased with increasing concentration of NaOH, specific surface area, and reaction *** leached under optimum conditions, 2 mol/L NaOH, 53 μm particle undersize, 1:10 solid/liquid ratio, 250 r/min stirring speed, 100℃ reaction temperature, 12 hr, the Li leaching efficiency was approximately 70%.However, when the leaching experiment was performed for 48 hr, the concentration of Li+ ions contained in the leach liquor decreased from 1160 to 236 mg/*** investigate the origin of this phenomenon, the obtained leach residue was analyzed by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray *** analyses show that zeolite was formed around the lithium aluminum silicate glass-ceramics, which affected the leaching of by adsorbing Li+ *** addition, using the shrinking-core model and the Arrhenius equation, the leaching reaction with NaOH was found to depends on the chemical reaction of the two reactants, with a higher than 41.84 kJ/mol of the activation energy.

关键词： Lithium aluminum silicate glass-ceramics NaOH Lithium Leaching

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Neural Tract Degeneration Correlates with Functional Impairment in Patients with Anoxic Brain Injury:A Tract-based Spatial Statistics Study

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Neuroscience Bulletin 2020年第8期36卷 932-936页

作者： Ji-Yun Park Sung Ho Park Jeong-Hee Yang Han Do lee Jiho lee Ki-Hyun Byeon Seo Young Park dongseok Yang Department of Neurology University of Ulsan College of MedicineUlsan University HospitalUlsan 44033Korea Department of Neurosurgery Ulsan University HospitalUlsan 44033Korea Department of Plastic Surgery Biomedical Research InstituteSeoul National University HospitalSeoul 03080Korea Department of Physical Therapy College of UlsanUlsan 44022Korea Department of Occupational and Environmental Medicine University of Ulsan College of MedicineUlsan University HospitalUlsan 44033Korea Physical Medicine and Rehabilitation University of Ulsan College of MedicineUlsan University HospitalUlsan 44033Korea Department of Clinical Epidemiology and Biostatistics Asan Medical CenterSeoul 05505Korea

Dear Editor,Anoxic brain injury(ABI)is a devastating event caused by cardiac arrest,chemical exposure,or *** recent advances in medical diagnostic techniques and treatments,the survival rate after ABI is still very *** studies have reported that 52.6%-64.0%of people who received cardiopulmonary resuscitation after nontraumatic cardiac arrest die,and 9.0%-18.6%remain in a permanent vegetative state within 28 days of treatment[1,2].

关键词： Tract cardiac treatment

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Quantitative autonomic function test in differentiation of multiple system atrophy from idiopathic Parkinson disease

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Chinese Medical Journal 2019年第16期132卷 1919-1924页

作者： Ji-Yun Park dongseok Yang Hei-Jun Yang Hyun Ah Kim Saeromi Kim Deokhyun Heo Jeong-Ho Park Eek-Sung lee Tae-Kyeong lee Department of Neurology Ulsan University HospitalUniversity of Ulsan College of MedicineUlsan 44033Korea Department of Physical Medicine and Rehabilitation Ulsan University HospitalUniversity of Ulsan College of MedicineUlsan 44033Korea Department of Neurology Keimyu叩 University School of MedicineDaegu 42601Korea Department of Neurology College of MedicineSoonchunhyang UniversitySoonchunhyang University Bucheon HospitalBucheon 14584Korea

Background:Differential diagnosis of idiopathic Parkinson disease (IPD) and multiple system atrophy-Parkinson type (MSA-P) is challenging since they share clinical features with parkinsonism and autonomic *** distinguish MSA-P from IPD when the symptoms are relatively mild,we investigated the usefulness of the quantitative fractionalized autonomic indexes and evaluated the correlations of autonomic test indexes and functional ***:Thirty-six patients with parkinsonism (22 with IPD and 14 with MSA-P) in Soonchunhyang University Bucheon Hospital from February 2014 to June 2015 were prospectively enrolled in the *** compared fractionalized autonomic indexes and composite autonomic scoring scale between patients with IPD and MSA-P with Hoehn and Yahr (H&Y) score ≤*** indexes included expiratory/inspiratory ratio during deep breathing,Valsalva ratio (VR),and regression slope of systolic blood pressure (BP) in early phase Ⅱ (vagal baroreflex sensitivity) during Valsalva *** adrenergic indexes were pressure recovery time (PRT) and adrenergic baroreflex sensitivity (BRSa) (BP decrement associated with phase 3 divided by the PRT),sympathetic index 1,sympathetic index 3,early phase Ⅱ mean BP drop,and pulse pressure reduction ***,we compared the unified multiple system atrophy rating scale (UMSARS) and H&Y scores and the autonomic indexes in all ***:PRT was significantly different between the IPD and MSA-P groups (P =0.004) despite the similar BP drop during *** value of PRT was 5.5 s (sensitivity,71.4%;specificity,72.7%).VR (r =-0.455,P =0.009) and BRSa (r =-0.356,P =0.036) demonstrated a significant correlation with UMSARS and H&Y ***:Among the cardiovascular autonomic indexes,PRT can be a useful parameter in differentiating the early stage of MSA-P from that of ***,VR,and BRSa may be the optimal indexes in determining functional symptom severity.

关键词： Parkinson disease Multiple system atrophy Autonomic dysfunction Cardiovascular autonomic indexes

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