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Article ; Online: Controlled Frustration Release on the Kagome Lattice by Uniaxial-Strain Tuning.

Wang, Jierong / Spitaler, M / Su, Y-S / Zoch, K M / Krellner, C / Puphal, P / Brown, S E / Pustogow, A

2024 Volume 131, Issue 25, Page(s) 256501

Abstract: It is predicted that strongly interacting spins on a frustrated lattice may lead to a quantum disordered ground state or even form a quantum spin liquid with exotic low-energy excitations. However, a controlled tuning of the frustration strength, ... ...

Abstract	It is predicted that strongly interacting spins on a frustrated lattice may lead to a quantum disordered ground state or even form a quantum spin liquid with exotic low-energy excitations. However, a controlled tuning of the frustration strength, separating its effects from those of disorder and other factors, is pending. Here, we perform comprehensive ^{1}H NMR measurements on Y_{3}Cu_{9}(OH)_{19}Cl_{8} single crystals revealing an unusual Q[over →]=(1/3×1/3) antiferromagnetic state below T_{N}=2.2 K. By applying in situ uniaxial stress, we break the symmetry of this disorder-free, frustrated kagome system in a controlled manner yielding a linear increase of T_{N} with strain, in line with theoretical predictions for a distorted kagome lattice. In-plane strain of ≈1% triggers a sizable enhancement ΔT_{N}/T_{N}≈10% due to a release of frustration, demonstrating its pivotal role for magnetic order.
Language	English
Publishing date	2024-01-05
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.131.256501
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Book ; Online: Controlling frustrated magnetism on the kagome lattice by uniaxial-strain tuning

Wang, Jierong / Su, Y. -S. / Spitaler, M. / Puphal, P. / Krellner, C. / Brown, S. E. / Pustogow, A.

2022

Abstract: It is predicted that strongly interacting spins on a frustrated lattice may lead to a quantum disordered ground state or even form a quantum spin liquid with exotic low-energy excitations. However, a thorough tuning of the frustration strength, ... ...

Abstract	It is predicted that strongly interacting spins on a frustrated lattice may lead to a quantum disordered ground state or even form a quantum spin liquid with exotic low-energy excitations. However, a thorough tuning of the frustration strength, separating its effects from those of disorder and other factors, is pending. Here we break the symmetry of a kagome-lattice compound in a controlled manner by applying $in$ $situ$ uniaxial stress. The transition temperature of $\rm Y_3Cu_9(OH)_{18}OCl_8$ is linearly enhanced with strain, $\Delta T_{\rm N}/T_{\rm N} \approx 10\%$ upon in-plane compression of order $1\%$, providing clear evidence for a release of frustration and its pivotal role for magnetic order. Our comprehensive $^1$H NMR results suggest a $\overrightarrow{Q}=(1/3\times 1/3)$ state under unstrained conditions and further reveal an incomplete antiferromagnetic transition with fluctuating moments in this strongly frustrated system. Comment: 7 pages total, 4 pages main text, 5 figures
Keywords	Condensed Matter - Strongly Correlated Electrons ; Condensed Matter - Materials Science
Subject code	530
Publishing date	2022-09-18
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Dipolar order in an amphidynamic crystalline metal-organic framework through reorienting linkers.

Su, Y-S / Lamb, E S / Liepuoniute, I / Chronister, A / Stanton, A L / Guzman, P / Pérez-Estrada, S / Chang, T Y / Houk, K N / Garcia-Garibay, M A / Brown, S E

Nature chemistry

2021 Volume 13, Issue 3, Page(s) 278–283

Abstract: Amphidynamic crystals, which possess crystallinity and support dynamic behaviours, are very well suited to the exploration of emergent phenomena that result from the coupling on the dynamic moieties. Here, dipolar rotors have been embedded in a ... ...

Abstract	Amphidynamic crystals, which possess crystallinity and support dynamic behaviours, are very well suited to the exploration of emergent phenomena that result from the coupling on the dynamic moieties. Here, dipolar rotors have been embedded in a crystalline metal-organic framework. The material consists of Zn(II) nodes and two types of ditopic bicyclo[2.2.2]octane-based linkers-one that coordinates to the Zn clusters through two 1,4-aza moieties, and a difluoro-functionalized derivative (the dipolar rotor) that coordinates through linked 1,4-dicarboxylate groups instead. Upon cooling, these linkers collectively order as a result of correlated dipole-dipole interactions. Variable-temperature, frequency-dependent dielectric measurements revealed a transition temperature T
Language	English
Publishing date	2021-02-15
Publishing country	England
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	2464596-5
ISSN	1755-4349 ; 1755-4330
ISSN (online)	1755-4349
ISSN	1755-4330
DOI	10.1038/s41557-020-00618-6
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Article ; Online: A simple and rapid model for hair-follicle regeneration in the nude mouse.

Su, Y-S / Miao, Y / Jiang, J-D / Liu, H / Hu, J / Hu, Z-Q

Clinical and experimental dermatology

2015 Volume 40, Issue 6, Page(s) 653–658

Abstract: Background: Methods for hair-follicle regeneration are important tools for investigating signalling and cytokines during hair-follicle morphogenesis and cycling. Several animal models for hair reconstitution have been established; however, these models ... ...

Abstract	Background: Methods for hair-follicle regeneration are important tools for investigating signalling and cytokines during hair-follicle morphogenesis and cycling. Several animal models for hair reconstitution have been established; however, these models have several shortcomings. Aim: To develop a simple and rapid model for hair induction in nude mouse. Methods: We designed an improved flap model (IFM) for hair regeneration based on the existing flap assay. Histological sections and scanning electron microscopy were used to evaluate the regenerated hair. The fates of grafted cells were traced by fluorescence. The time required for hair induction was analysed and compared. Results: IFM produced a large number of normal hairs, and the time required for hair induction using IFM was 20.67 ± 0.67 days, compared with 29.33 ± 0.67 days for the traditional flap assay. Conclusions: The time required for hair regeneration is considerably shortened with IFM. We speculate that this is due to increased blood supply at the transplantation sites.
MeSH term(s)	Animals ; Cell Transplantation/methods ; Cells, Cultured ; Dermis/cytology ; Hair/growth & development ; Hair/ultrastructure ; Hair Follicle/cytology ; Hair Follicle/growth & development ; Mice ; Mice, Inbred C57BL ; Mice, Nude ; Microscopy, Electron, Scanning ; Models, Animal ; Regeneration ; Tissue Engineering/methods
Language	English
Publishing date	2015-08
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	195504-4
ISSN	1365-2230 ; 0307-6938
ISSN (online)	1365-2230
ISSN	0307-6938
DOI	10.1111/ced.12563
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Article ; Online: Icariin promotes mouse hair follicle growth by increasing insulin-like growth factor 1 expression in dermal papillary cells.

Su, Y-S / Fan, Z-X / Xiao, S-E / Lin, B-J / Miao, Y / Hu, Z-Q / Liu, H

Clinical and experimental dermatology

2017 Volume 42, Issue 3, Page(s) 287–294

Abstract: Background: Icariin is a major flavonoid isolated from Epimedium spp. leaves (Epimedium Herba), and has multiple pharmacological functions, including anti-angiogenesis, anti-oxidant, anti-inflammatory and immunoprotective effects.: Aim: To ... ...

Abstract	Background: Icariin is a major flavonoid isolated from Epimedium spp. leaves (Epimedium Herba), and has multiple pharmacological functions, including anti-angiogenesis, anti-oxidant, anti-inflammatory and immunoprotective effects. Aim: To investigate whether icariin can stimulate growth of hair follicles in mice and the underlying mechanism. Methods: In vitro, the effect of icariin on hair growth was assessed by using a vibrissae hair follicle (VHF) organ-culture model. The proliferation of hair matrix keratinocytes and the expression of insulin-like growth factor (IGF)-1 in follicles were examined by double immunostaining for 5-bromo-2'-deoxyuridine and IGF-1, in the presence or absence of icariin. Dermal papilla cells (DPCs) were cultured and IGF-1 level was measured by reverse transcription-PCR and ELISA after icariin treatment. In vivo, the effect of icariin on hair growth was examined by gavage feeding of icariin to mice whose backs had been depilated, and the conversion of telogen to anagen hair was observed. Results: Treatment with icariin promoted hair shaft elongation, prolonged the hair cycle growth phase (anagen) in cultured VHFs, and accelerated transition of hair cycle from telogen to anagen phase in the dorsal skin of mice. There was significant proliferation of matrix keratinocytes and an increased level of IGF-1 in cultured VHFs. Moreover, icariin treatment upregulated IGF-1 mRNA expression in DPCs and increased IGF-1 protein content in the conditioned medium of DPCs. Conclusions: These results suggest that icariin can promote mouse hair follicle growth via stimulation of IGF-1 expression in DPCs.
MeSH term(s)	Animals ; Bromodeoxyuridine/metabolism ; Cell Proliferation/drug effects ; Dermis/cytology ; Drugs, Chinese Herbal/pharmacology ; Enzyme-Linked Immunosorbent Assay ; Epimedium/chemistry ; Flavonoids/pharmacology ; Hair Follicle/drug effects ; Hair Follicle/growth & development ; Hair Follicle/metabolism ; Immunohistochemistry ; Insulin-Like Growth Factor I/metabolism ; Keratinocytes/drug effects ; Mice ; Mice, Inbred C57BL ; Models, Animal ; Organ Culture Techniques
Chemical Substances	Drugs, Chinese Herbal ; Flavonoids ; Insulin-Like Growth Factor I (67763-96-6) ; Bromodeoxyuridine (G34N38R2N1) ; icariin (VNM47R2QSQ)
Language	English
Publishing date	2017-04
Publishing country	England
Document type	Journal Article
ZDB-ID	195504-4
ISSN	1365-2230 ; 0307-6938
ISSN (online)	1365-2230
ISSN	0307-6938
DOI	10.1111/ced.13043
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Article ; Online: Constraints on the superconducting order parameter in Sr

Pustogow, A / Luo, Yongkang / Chronister, A / Su, Y-S / Sokolov, D A / Jerzembeck, F / Mackenzie, A P / Hicks, C W / Kikugawa, N / Raghu, S / Bauer, E D / Brown, S E

Nature

2019 Volume 574, Issue 7776, Page(s) 72–75

Abstract: Phases of matter are usually identified through spontaneous symmetry breaking, especially regarding unconventional superconductivity and the interactions from which it originates. In that context, the superconducting state of the quasi-two-dimensional ... ...

Abstract	Phases of matter are usually identified through spontaneous symmetry breaking, especially regarding unconventional superconductivity and the interactions from which it originates. In that context, the superconducting state of the quasi-two-dimensional and strongly correlated perovskite Sr
Language	English
Publishing date	2019-09-23
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/s41586-019-1596-2
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Zs.A 26: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
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Zs.MO 244: Show issues

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Article ; Online: The worldwide spread of ciprofloxacin-resistant Shigella sonnei among HIV-infected men who have sex with men, Taiwan.

Chiou, C-S / Izumiya, H / Kawamura, M / Liao, Y-S / Su, Y-S / Wu, H-H / Chen, W-C / Lo, Y-C

Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases

2016 Volume 22, Issue 4, Page(s) 383.e11–383.e16

Abstract: Ciprofloxacin-resistant shigellosis outbreaks among men who have sex with men (MSM) have not been reported in Asia. During 3 March to 6 May 2015, the Notifiable Disease Surveillance System detected nine non-imported Shigella sonnei infections among human ...

Abstract	Ciprofloxacin-resistant shigellosis outbreaks among men who have sex with men (MSM) have not been reported in Asia. During 3 March to 6 May 2015, the Notifiable Disease Surveillance System detected nine non-imported Shigella sonnei infections among human immunodeficiency virus (HIV) -infected Taiwanese MSM. We conducted a molecular epidemiological investigation using a 1 : 5 matched case-control study and laboratory characterizations for the isolates. Of the nine patients, four reported engagement in oral-anal sex before illness onset. Shigellosis was associated with a syphilis report within 12 months (adjusted odds ratio (aOR) 8.6; 95% CI 1.05-70.3) and no HIV outpatient follow-up within 12 months (aOR 22.3; 95% CI 2.5-201). Shigella sonnei isolates from the nine patients were all ciprofloxacin-resistant and the resistance was associated with S83L and D87G mutations in gyrA and S80I mutation in parC. The nine outbreak isolates were discriminated into two closely related pulsed-field gel electrophoresis (PFGE) genotypes and seven 8-locus multilocus variable-number tandem repeat analysis (MLVA8) types that suggest multiple sources of infections for the outbreak and possible under-recognition of infection among Taiwanese MSM. The outbreak isolates were characterized to be variants of the intercontinentally transmitted SS18.1 clone, which falls into the globally prevalent phylogenetic sub-lineage IIIb. Inter-database pattern similarity searching indicated that the two PFGE genotypes had emerged in the USA and Japan. The epidemiological characteristics of this outbreak suggest roles of risky sexual behaviours or networks in S. sonnei transmission. We urge enhanced surveillance and risk-reduction interventions regionally against the interplay of HIV and shigellosis among MSM.
MeSH term(s)	Adult ; Anti-Bacterial Agents/pharmacology ; Case-Control Studies ; Ciprofloxacin/pharmacology ; DNA Gyrase/genetics ; DNA Topoisomerase IV/genetics ; Disease Outbreaks ; Disease Transmission, Infectious ; Drug Resistance, Bacterial ; Dysentery, Bacillary/epidemiology ; Dysentery, Bacillary/microbiology ; Dysentery, Bacillary/transmission ; Electrophoresis, Gel, Pulsed-Field ; Genotype ; HIV Infections/complications ; Homosexuality, Male ; Humans ; Male ; Middle Aged ; Minisatellite Repeats ; Molecular Epidemiology ; Molecular Typing ; Mutation, Missense ; Shigella sonnei/drug effects ; Taiwan/epidemiology ; Young Adult
Chemical Substances	Anti-Bacterial Agents ; Ciprofloxacin (5E8K9I0O4U) ; DNA Topoisomerase IV (EC 5.99.1.-) ; DNA Gyrase (EC 5.99.1.3)
Language	English
Publishing date	2016-04
Publishing country	England
Document type	Journal Article
ZDB-ID	1328418-6
ISSN	1469-0691 ; 1470-9465 ; 1198-743X
ISSN (online)	1469-0691
ISSN	1470-9465 ; 1198-743X
DOI	10.1016/j.cmi.2015.12.021
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Zs.A 4541: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (2.OG) ab Jg. 2022: Lesesaal (EG)
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Article ; Online: Effects of extracellular matrix on the growth characteristics of human dermal papillae cells in vitro.

Miao, Y / Fan, Z X / Du, L J / Su, Y S / Sun, Y B / Jiang, W / Hu, Z Q

Clinical and experimental dermatology

2016 Volume 41, Issue 7, Page(s) 792–797

Abstract: Background: In humans, dermal papillae cells (DPCs) are surrounded by basal membranes. However, conventional in vitro culture conditions for DPCs do not include extracellular matrix (ECM).: Aim: To investigate the effects of different ECM types on ... ...

Abstract	Background: In humans, dermal papillae cells (DPCs) are surrounded by basal membranes. However, conventional in vitro culture conditions for DPCs do not include extracellular matrix (ECM). Aim: To investigate the effects of different ECM types on the characteristics of cultured human DPCs. Methods: Freshly isolated human DPCs were inoculated onto plates precoated with type IV collagen, fibronectin, Matrigel or hyaluronate. Cell migration, growth and viability were measured. Real-time quantitative (q)PCR and western blotting were used to detect the influence of different ECM types on the expression of DPC-specific biomarkers. Results: In planar culture, type IV collagen and fibronectin had a beneficial effect on the migration, aggregation and viability of DPCs, in contrast to Matrigel and hyaluronate. Real-time qPCR revealed that significantly increased expression of mRNA was seen only for neural cell adhesion molecule (NCAM) and α-smooth muscle actin (α-SMA) in the Matrigel group, whereas versican, NCAM and α-SMA all decreased significantly in the hyaluronate group. In the type IV collagen and fibronectin groups, mRNA expression of the above genes did not change significantly. Western blotting indicated that there were no significant differences in expression of the above proteins between the four groups and the control group. Conclusion: In planar culture, exogenous ECM types (Matrigel, type IV collagen, hyaluronate and fibronectin) changed the growth characteristics of DPCs, but they did not affect the characteristics associated with the biological functions of DPCs.
Language	English
Publishing date	2016-10
Publishing country	England
Document type	Journal Article
ZDB-ID	195504-4
ISSN	1365-2230 ; 0307-6938
ISSN (online)	1365-2230
ISSN	0307-6938
DOI	10.1111/ced.12888
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Article: Diffusion mechanism of hydrogen in amorphous silicon: ab initio molecular dynamics simulation.

Su, Y-S / Pantelides, S T

Physical review letters

2002 Volume 88, Issue 16, Page(s) 165503

Abstract: The mechanism of H migration in amorphous Si has remained an unresolved problem. The main issue is the small activation energy (1.5 eV) relative to the known strength of Si-H bonds (2-3.5 eV). We report first-principles finite-temperature simulations ... ...

Abstract	The mechanism of H migration in amorphous Si has remained an unresolved problem. The main issue is the small activation energy (1.5 eV) relative to the known strength of Si-H bonds (2-3.5 eV). We report first-principles finite-temperature simulations which demonstrate vividly that H is not released spontaneously, as proposed by most models, but awaits the arrival of a floating bond (FB). The "migrating species" is an FB-H complex, with H jumping from Si to Si and the FB literally floating around it. Migration stops when the FB veers away.
Language	English
Publishing date	2002-04-22
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.88.165503
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Article: Antioxidant properties of Lactobacillus-fermented and non-fermented Graptopetalum paraguayense E. Walther at different stages of maturity

Wu, S.-C. / Su, Y.-S. / Cheng, H.-Y.

Food chemistry

2011 Volume 129, Issue 3, Page(s) 804

Language	English
Document type	Article
ZDB-ID	243123-3
ISSN	0308-8146
Database	Current Contents Nutrition, Environment, Agriculture

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