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Article: Direct conversion of cellulose to high-yield methyl lactate over Ga-doped Zn/H-nanozeolite Y catalysts in supercritical methanol

Verma, Deepak / Insyani, Rizki / Suh, Young-Woong / Kim, Seung Min / Kim, Seok Ki / Kim, Jaehoon

Green chemistry. 2017 Apr. 18, v. 19, no. 8

2017

Abstract: ... Zn/H-nanozeolite Y (Ga-doped Zn/HNZY) catalyst is described. Under optimized conditions at 280 °C ...

Abstract	For realizing sustainable bio-based refineries, it is crucial to obtain high yields of value-added chemicals via the direct conversion of cellulose and lignocellulosic biomass. Although the conversion of cellulose using homogeneous catalysts has been demonstrated to be quite successful, low cellulose conversion and poor product selectivity have been observed using heterogeneous catalysts. In this study, for the first time, the efficient conversion of cellulose to lactic acid derivatives, which can be used as a green solvent and a potential precursor for fine chemicals and biodegradable polymers, over a Ga-doped Zn/H-nanozeolite Y (Ga-doped Zn/HNZY) catalyst is described. Under optimized conditions at 280 °C in supercritical methanol, methyl lactate (ML) and methyl 2-methoxypropionate (MMP) are obtained in yields of 57.8% and 12.8%, respectively, from cellulose; these values are greater than those reported in previous studies conducted using heterogeneous catalysts. Using oakwood, ML and MMP are obtained in yields of 12.3% and 18.6%, respectively. A large external surface area of the HNZY support and the synergistic effect of Ga doping on ZnO enhance Lewis acid sites with the simultaneous decrease of the Brønsted acid sites. This unique catalyst (Ga-doped Zn/HNZY) is beneficial for controlling the consecutive reaction pathways of the decomposition of cellulose to glucose, retro-aldol condensation to trioses, and intramolecular Cannizzaro reaction to ML.
Keywords	Bronsted acids ; Lewis acids ; biodegradability ; biomass ; catalysts ; cellulose ; gallium ; glucose ; green chemistry ; lactic acid ; lignocellulose ; methanol ; polymers ; solvents ; surface area ; synergism ; trioses ; value added ; zinc ; zinc oxide
Language	English
Dates of publication	2017-0418
Size	p. 1969-1982.
Publishing place	The Royal Society of Chemistry
Document type	Article
ZDB-ID	2006274-6
ISSN	1463-9270 ; 1463-9262
ISSN (online)	1463-9270
ISSN	1463-9262
DOI	10.1039/c7gc00432j
Database	NAL-Catalogue (AGRICOLA)

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Article: Effect of Y chromosome and H-2 complex derived from Japanese wild mouse on sperm morphology.

Suh, D S / Styrna, J / Moriwaki, K

Genetical research

1989 Volume 53, Issue 1, Page(s) 17–19

Abstract: ... obtained from reciprocal crosses involving two B10.congenic strains carrying H-2 and the Y chromosome ... Segregation of sperm abnormality level and H-2 haplotypes was investigated in F2 hybrid males ... of Japanese wild mice: B10.MOL-OHM (H-2wm4, 23.1% of sperm abnormalities) and B10.MOL-OKB (H-2wm8, 11.1 ...

Abstract	Segregation of sperm abnormality level and H-2 haplotypes was investigated in F2 hybrid males obtained from reciprocal crosses involving two B10.congenic strains carrying H-2 and the Y chromosome of Japanese wild mice: B10.MOL-OHM (H-2wm4, 23.1% of sperm abnormalities) and B10.MOL-OKB (H-2wm8, 11.1% of sperm abnormalities). In both types of crosses mean levels of abnormal spermatozoa were significantly higher for males typed as H-2wm4/H-2wm4 than for heterozygous H-2wm4/H-2wm8 or homozygous H-2wm8/H-2wm8. These results suggest that the gene for high sperm abnormality is linked to H-2 complex of the B10.MOL-OHM strain.
MeSH term(s)	Animals ; H-2 Antigens/genetics ; Male ; Muridae ; Spermatozoa/abnormalities ; Y Chromosome
Chemical Substances	H-2 Antigens
Language	English
Publishing date	1989-02
Publishing country	England
Document type	Journal Article
ZDB-ID	205702-5
ISSN	0016-6723
ISSN	0016-6723
DOI	10.1017/s0016672300027816
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Article ; Online: Association of Balance Impairment with Risk of Incident Dementia among Older Adults.

Kim, H J / Jeong, S / Oh, Y H / Suh, M J

The journal of prevention of Alzheimer's disease

2023 Volume 11, Issue 1, Page(s) 130–137

Abstract: Background: A growing body of data suggests that balance impairment may be linked to the onset of dementia.: Objectives: However, a large-scale epidemiologic investigation is needed to clarify its association in older adults.: Design: A ... ...

Abstract	Background: A growing body of data suggests that balance impairment may be linked to the onset of dementia. Objectives: However, a large-scale epidemiologic investigation is needed to clarify its association in older adults. Design: A retrospective-prospective hybrid database. Setting: Cox proportional hazards regression model was used to assess the relationship between balance impairment and the risk of incident dementia, and the results were provided as adjusted hazard ratios (aHR) with 95% confidence intervals (CI). All participants were tracked until the date of incident dementia, death, or 31 December 2019 whichever came first. Participants: We analyzed 143,788 older adults who had at least one health screening between 2009 and 2019 from the Korea National Health Insurance Service-Senior Cohort. Measurements: A total of 3,774 cases of dementia were discovered throughout 850,425 person-years of follow-up investigation. Balance impairment was associated with a risk of dementia compared to those without balance impairment (adjusted hazard ratio [aHR] 1.83; 95% CI, 1.69-2.00; P value <0.001). Results: Risks of the Alzheimer's disease (aHR, 1.80; 95% CI, 1.65-1.96; P for trend <0.001) and the vascular dementia (aHR, 2.94; 95% CI, 1.89-4.58; P for trend <0.001) showed comparable trends and findings. Conclusions: Balance impairment was found to be independently associated with an increased risk of dementia in older adults.
MeSH term(s)	Humans ; Aged ; Retrospective Studies ; Prospective Studies ; Alzheimer Disease/diagnosis ; Dementia, Vascular
Language	English
Publishing date	2023-12-31
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2782183-3
ISSN	2426-0266 ; 2274-5807
ISSN (online)	2426-0266
ISSN	2274-5807
DOI	10.14283/jpad.2023.79
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Article ; Online: Efficacy and safety of shunt surgery in patients with idiopathic normal-pressure hydrocephalus: can we predict shunt response by preoperative magnetic resonance imaging (MRI)?

Yun, S Y / Suh, C H / Byun, J H / Jo, S Y / Chung, S J / Lim, J-S / Lee, J-H / Kim, M J / Kim, H S / Kim, S J

Clinical radiology

2024

Abstract: Aim: The aim of this study was to identify preoperative magnetic resonance imaging (MRI) findings that can predict the shunt responsiveness in idiopathic normal-pressure hydrocephalus (iNPH) patients and to investigate postoperative outcome and ... ...

Abstract	Aim: The aim of this study was to identify preoperative magnetic resonance imaging (MRI) findings that can predict the shunt responsiveness in idiopathic normal-pressure hydrocephalus (iNPH) patients and to investigate postoperative outcome and complications. Materials and methods: A total of 192 patients with iNPH who underwent shunt at our hospital between 2000 and 2021 were included to investigate complications. Of these, after exclusion, 127 (1-month postoperative follow-up) and 77 (1-year postoperative follow-up) patients were evaluated. The preoperative MRI features (the presence of tightness of the high-convexity subarachnoid space, Sylvian fissure enlargement, Evans' index, and callosal angle) of the shunt-response and nonresponse groups were compared, and a systematic review was conducted to evaluate whether preoperative MRI findings could predict shunt response. Results: Postoperative complications within one month after surgery were observed in 6.8% (13/192), and the most common complication was hemorrhage. Changes in corpus callosum were observed in 4.2% (8/192). The shunt-response rates were 83.5% (106/127) in the 1-month follow-up group and 70.1% (54/77) in 1-year follow-up group. In the logistic regression analysis, only Evans' index measuring >0.4 had a significant negative relationship with shunt response at 1-month follow-up; however, no significant relationship was observed at 1-year follow-up. According to our systematic review, it is still controversial whether preoperative MRI findings could predict shunt response. Conclusion: Evans' index measure of >0.4 had a significant relationship with the shunt response in the 1-month follow-up group. In systematic reviews, there is ongoing debate about whether preoperative MRI findings can accurately predict responses to shunt surgery. Postoperative corpus callosal change was observed in 4.2% of iNPH patients.
Language	English
Publishing date	2024-03-21
Publishing country	England
Document type	Journal Article
ZDB-ID	391227-9
ISSN	1365-229X ; 0009-9260
ISSN (online)	1365-229X
ISSN	0009-9260
DOI	10.1016/j.crad.2024.03.004
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Article ; Online: Image findings of anti-neutrophil cytoplasmic antibody-associated vasculitis involving the skull base.

Yun, S Y / Choi, Y J / Chung, S R / Suh, C H / Kim, S C / Lee, J H / Baek, J H

Clinical radiology

2023 Volume 78, Issue 8, Page(s) e568–e573

Abstract: Aim: To investigate computed tomography (CT) and magnetic resonance imaging (MRI) features of skull bases involving anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitides (AAV).: Materials and methods: A retrospective review was ... ...

Abstract	Aim: To investigate computed tomography (CT) and magnetic resonance imaging (MRI) features of skull bases involving anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitides (AAV). Materials and methods: A retrospective review was undertaken to identify an institutional historical cohort of 17 patients with confirmed AAV who underwent CT or MRI and had skull base involvement between 2002 and 2021. Two radiologists reviewed the extent and features of the lesions, bone changes, and other MRI findings. Results: A total of 17 patients (12 men; mean age ± standard deviation, 46.5 ± 17.1 years) were selected. AAV presented as infiltrative lesions with involvement at various sites. Most cases involved the paranasal sinuses (PNS; 88%, 15/17), nasopharynx (88%, 15/17), pterygopalatine fossa (82%, 14/17), and parapharyngeal space (82%, 14/17), frequently accompanied by mucosal irregularity of the PNS and nasopharynx (71%, 12/17). Central skull base and temporal bone involvement were seen in 53% (9/17) and 38% (6/16) of cases, respectively. On T1-weighted imaging (WI) and T2WI MRI, all lesions (15/15) showed predominant signal iso-intensity to grey matter. Conclusions: Although radiological findings of AAV are non-specific and skull base involvement is less common, AAV may be considered if infiltrative lesions predominantly involving the PNS, nasopharynx, pterygopalatine fossa, and parapharyngeal space with combined bone changes of skull base are seen.
MeSH term(s)	Male ; Humans ; Skull Base ; Tomography, X-Ray Computed/methods ; Paranasal Sinuses/pathology ; Anti-Neutrophil Cytoplasmic Antibody-Associated Vasculitis/diagnostic imaging ; Anti-Neutrophil Cytoplasmic Antibody-Associated Vasculitis/pathology ; Magnetic Resonance Imaging/methods ; Retrospective Studies
Language	English
Publishing date	2023-04-23
Publishing country	England
Document type	Journal Article
ZDB-ID	391227-9
ISSN	1365-229X ; 0009-9260
ISSN (online)	1365-229X
ISSN	0009-9260
DOI	10.1016/j.crad.2023.04.004
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Article ; Online: Utilizing Gate-Controlled Supercurrent for All-Metallic Tunable Superconducting Microwave Resonators.

Ryu, Younghun / Jeong, Jinhoon / Suh, Junho / Kim, Jihwan / Choi, Hyoungsoon / Cha, Jinwoong

Nano letters

2024 Volume 24, Issue 4, Page(s) 1223–1230

Abstract: Hybridizing a microwave mode with a quantum state requires precise frequency matching of a superconducting microwave resonator and the corresponding quantum object. However, fabrication always brings imperfections in geometry and material properties, ... ...

Abstract	Hybridizing a microwave mode with a quantum state requires precise frequency matching of a superconducting microwave resonator and the corresponding quantum object. However, fabrication always brings imperfections in geometry and material properties, causing deviations from the desired operating frequencies. An effective and universal strategy for their resonant coupling is to tune the frequency of a resonator, as quantum states like phonons are hardly tunable. Here, we demonstrate gate-tunable, titanium-nitride (TiN)-based superconducting resonators by implementing a nanowire inductor whose kinetic inductance is tuned via the gate-controlled supercurrent (GCS) effect. We investigate their responses for different gate biases and observe 4% (∼150 MHz) frequency tuning with decreasing internal quality factors. We also perform temperature-controlled experiments to support phonon-related mechanisms in the GCS effect and the resonance tuning. The GCS effect-based method proposed in this study provides an effective route for locally tunable resonators that can be employed in various hybrid quantum devices.
Language	English
Publishing date	2024-01-17
Publishing country	United States
Document type	Journal Article
ISSN	1530-6992
ISSN (online)	1530-6992
DOI	10.1021/acs.nanolett.3c04080
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Ultrafast Negative Capacitance Transition for 2D Ferroelectric MoS

Daw, Debottam / Bouzid, Houcine / Jung, Moonyoung / Suh, Dongseok / Biswas, Chandan / Hee Lee, Young

Advanced materials (Deerfield Beach, Fla.)

2024 Volume 36, Issue 13, Page(s) e2304338

Abstract: Negative capacitance gives rise to subthreshold swing (SS) below the fundamental limit by efficient modulation of surface potential in transistors. While negative-capacitance transition is reported in polycrystalline Pb( ... ...

Abstract	Negative capacitance gives rise to subthreshold swing (SS) below the fundamental limit by efficient modulation of surface potential in transistors. While negative-capacitance transition is reported in polycrystalline Pb(Zr
Language	English
Publishing date	2024-01-04
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1474949-X
ISSN	1521-4095 ; 0935-9648
ISSN (online)	1521-4095
ISSN	0935-9648
DOI	10.1002/adma.202304338
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Article ; Online: In vitro and in vivo antiviral effects of CLEVir-X against porcine reproductive and respiratory syndrome virus.

Suh, Jeongmin / Ham, Sehyeong / Kim, Youngnam / Kim, Sunghun / Cho, Ahreum / Moon, Hojin / Chae, Chanhee

Virus research

2024 Volume 345, Page(s) 199380

Abstract: The aim of this study was to investigate the in vitro and in vivo antiviral effects of CLEVir-X, against porcine reproductive and respiratory syndrome virus (PRRSV). CLEVir-X is a nucleoside analogue and a dialdehyde form of xanthosine. CLEVir-X ... ...

Abstract	The aim of this study was to investigate the in vitro and in vivo antiviral effects of CLEVir-X, against porcine reproductive and respiratory syndrome virus (PRRSV). CLEVir-X is a nucleoside analogue and a dialdehyde form of xanthosine. CLEVir-X demonstrated antiviral action during the in vitro portion of this experiment with its inosine monophosphate dehydrogenase (IMPDH) inhibition against PRRSV. The anti-PRRSV effect of CLEVir-X was recovered through supplementation with guanosine. This suggests that PRRSV replication may be regulated through IMPDH and its guanosine biosynthetic pathway. CLEVir-X treatment in cultures resulted in mutation frequency increase of up to 7.8-fold within the viral genomes (e.g. ORF6) compared to their parallel, untreated cultures. The incorporation of CLEVir-X into the viral genome causes lethal mutagenesis and subsequent decrease in specific infectivity. During the in vivo antiviral experiment, 21-day-old pigs began oral administration of 5 mL of phosphate buffered saline containing CLEVir-X (with purity of 68 % and dosage of 40 mg/kg body weight). This treatment was provided twice daily at 9:00AM and 5:00PM for 14 days. Pigs were simultaneously intranasally inoculated with PRRSV at the beginning of CLEVir-X treatment (21 days of age). Several beneficial effects from the oral administration of CLEVir-X were observed including reduction of body temperature, alleviation of respiratory clinical signs, decreased PRRSV load in both blood and lung tissues, and mitigation of lung interstitial pneumonia lesions. The results of the present study demonstrated that CLEVir-X has mutagenic and nonmutagenic modes of antiviral action against PRRSV based on both in vitro and in vivo antiviral experiments.
Language	English
Publishing date	2024-04-27
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	605780-9
ISSN	1872-7492 ; 0168-1702
ISSN (online)	1872-7492
ISSN	0168-1702
DOI	10.1016/j.virusres.2024.199380
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Article ; Conference proceedings: Adenomas per colonoscopy is superior to adenoma detection rate as a quality indicator of colonoscopy

Suh, Y. S. / Koo, J. S. / Kim, D. W. / Shin, H. K. / Kim, J. W. / Choi, D. K. / Park, K. H.

Endoscopy

2024 Volume 56, Issue S 02

Event/congress	ESGE Days 2024, Berlin, Germany, 2024-04-25
Language	English
Publishing date	2024-04-01
Publisher	Georg Thieme Verlag KG
Publishing place	Stuttgart ; New York
Document type	Article ; Conference proceedings
ZDB-ID	80120-3
ISSN	1438-8812 ; 0013-726X
ISSN (online)	1438-8812
ISSN	0013-726X
DOI	10.1055/s-0044-1782833
Database	Thieme publisher's database

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Article ; Online: Bilayer-Nanomesh Transparent Neuroelectrodes on 10μm-Thick PDMS.

Ryu, Jaehyeon / Qiang, Yi / Jang, Dongyeol / Suh, Junyeub / Fang, Hui

Technical digest. International Electron Devices Meeting

2023 Volume 2022, Page(s) 29.3.1–29.3.4

Abstract: Transparent electrode arrays have emerged as promising platforms for neural interfacing by enabling simultaneous electrophysiological recording and optical measurements. Soft and thin devices also have compelling advantages due to their less mechanical ... ...

Abstract	Transparent electrode arrays have emerged as promising platforms for neural interfacing by enabling simultaneous electrophysiological recording and optical measurements. Soft and thin devices also have compelling advantages due to their less mechanical mismatch with the brain tissue. Here we demonstrate a bilayer-nanomesh-based transparent microelectrode array (MEA) on ultrathin Polydimethylsiloxane (PDMS) substrate. We have successfully fabricated 32-channel, bilayer-nanomesh microelectrodes on PDMS with total device thickness down to only 10μm. In addition to excellent electrode performance, device reliability, and optical transparency, we have also demonstrated successful hydrophilic surface modification and great sterilization compatibility.
Language	English
Publishing date	2023-02-17
Publishing country	United States
Document type	Journal Article
ISSN	2156-017X
ISSN (online)	2156-017X
DOI	10.1109/iedm45625.2022.10019516
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