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Abstract
ABSTRACT Sleep has been found to have wide-ranging effects on sports performance and overall well-being. Recent research has found evidence relating chronic suboptimal sleep with the risk of musculoskeletal pain and sports injury. The amount of sleep that consistently has been found to be associated with increased risk of injury is ≤7 h of sleep, which when sustained for periods of at least 14 d has been associated with 1.7 times greater risk of musculoskeletal injury. However, it is unknown if sleep loss predisposes the athlete to specific types of musculoskeletal injuries. The role of sleep on musculoskeletal pain is important to understand as studies in both children and adults have found that suboptimal sleep more consistently predicts next-day pain as compared with pain predicting subsequent sleep loss. Despite the evidence that certain aspects of sleep behavior seem to increase the risk of musculoskeletal injury and pain, sleep should be considered as only a part of the athlete's overall health and well-being when assessing the athlete for risk of injury.
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Affiliation(s)
- Kevin Huang
- Department of Physical Medicine and Rehabilitation, Shirley Ryan AbilityLab/Northwestern University Feinberg School of Medicine, Chicago, IL
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AlEissa SI, Tamai K, Konbaz F, Alturkistany A, Blattert TR, Chhabra HS, Costanzo G, Dohring EJ, Kandziora F, Kothe R, Misaggi B, Muehlbauer EJ, Pereira P, Rajasekaran S, Sullivan WJ, Truumees E, Alqahtani Y, Alsobayel HI, Franke J, Teli MGA, Wang JC, Al-Hazzaa HM, Alosaimi MN, Berven S, Brayda-Bruno M, Briggs AM, Busari JO, Caserta AV, Côté P, Crostelli M, Fehlings MG, Gunzburg R, Haddadin S, Ihm J, Hilibrand AS, Luca A, Osvaldo M, Pigott T, Rothenfluh DA, Ruosi C, Salmi LR, Shetty AP, Singh K, Vaccaro AR, Wong DA, Zileli M, Nordin M. SPINE20 A global advocacy group promoting evidence-based spine care of value. Eur Spine J 2021; 30:2091-2101. [PMID: 34106349 DOI: 10.1007/s00586-021-06890-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/22/2021] [Accepted: 05/29/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE The Global Burden of Diseases (GBD) Studies have estimated that low back pain is one of the costliest ailments worldwide. Subsequent to GBD publications, leadership of the four largest global spine societies agreed to form SPINE20. This article introduces the concept of SPINE20, the recommendations, and the future of this global advocacy group linked to G20 annual summits. METHODS The founders of SPINE20 advocacy group coordinated with G20 Saudi Arabia to conduct the SPINE20 summit in 2020. The summit was intended to promote evidence-based recommendations to use the most reliable information from high-level research. Eight areas of importance to mitigate spine disorders were identified through a voting process of the participating societies. Twelve recommendations were discussed and vetted. RESULTS The areas of immediate concern were "Aging spine," "Future of spine care," "Spinal cord injuries," "Children and adolescent spine," "Spine-related disability," "Spine Educational Standards," "Patient safety," and "Burden on economy." Twelve recommendations were created and endorsed by 31/33 spine societies and 2 journals globally during a vetted process through the SPINE20.org website and during the virtual inaugural meeting November 10-11, 2020 held from the G20 platform. CONCLUSIONS This is the first time that international spine societies have joined to support actions to mitigate the burden of spine disorders across the globe. SPINE20 seeks to change awareness and treatment of spine pain by supporting local projects that implement value-based practices with healthcare policies that are culturally sensitive based on scientific evidence.
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Affiliation(s)
| | - Koji Tamai
- Department of Orthopedics, Osaka City University, Osaka, Japan.
| | | | | | | | | | | | | | - Frank Kandziora
- Center for Spinal Surgery and Neurotraumatology, Frankfurt, Germany
| | | | | | | | | | | | | | | | | | | | | | | | - Jeffrey C Wang
- University of Southern California Spine Center, Los Angeles, CA, USA
| | | | | | - Sigurd Berven
- University of California San Francisco, San Francisco, CA, USA
| | | | | | | | | | | | | | - Michael G Fehlings
- University of Toronto and University Health Network, Toronto, ON, Canada
| | | | - Sami Haddadin
- Munich School of Robotics and Machine Intelligence, TUM, Munich, Germany
| | - Joseph Ihm
- Shirley Ryan AbilityLab, Northwestern Feinberg School of Medicine, Chicago, IL, USA
| | | | | | | | | | | | | | - Louis-Rachid Salmi
- Université de Bordeaux, INSERM and Centre hospitalier universitaire de Bordeaux, Bordeaux, France
| | | | - Kern Singh
- Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL, USA
| | - Alexander R Vaccaro
- Sidney Kimmel Medical Center, Thomas Jefferson University, Philadelphia, PA, USA
| | - David A Wong
- North American Spine Society, Burr Ridge, IL, USA
| | | | - Margareta Nordin
- Departments of Orthopaedic Surgery and Environmental Medicine, NYU Grossman School of Medicine, New York University, New York, NY, USA
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Martin J, Jayabalan P, Ihm J. Focal Chest Pain- Rugby. Med Sci Sports Exerc 2019. [DOI: 10.1249/01.mss.0000561855.24444.0d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
Knee osteoarthritis (OA) is a major cause of disability in the United States. The condition has most commonly been associated with elderly sedentary individuals; however, it also can affect those who participate in regular athletic activities. The diagnosis and management of these individuals can be challenging because of both their higher level of physical activity and their overall athletic goals. Treatment requires an appropriate exercise regimen, rehabilitation program, and education of both the athlete and the coach. The focus of our article is to provide an up-to-date overview of the evaluation and management of the athletic individual who presents with symptomatic early knee OA, in particular, the nonsurgical rehabilitation treatment options available to the practitioner and the evidence to support these recommendations.
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Chu SK, Ihm J. Arm Swelling - Weight Lifting. Med Sci Sports Exerc 2016. [DOI: 10.1249/01.mss.0000485981.03282.3e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ihm J, Mautner K, Blazuk J, Singh JR. Platelet-Rich Plasma Versus an Eccentric Exercise Program for Recalcitrant Lateral Elbow Tendinopathy. PM R 2015; 7:654-61. [DOI: 10.1016/j.pmrj.2015.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 05/01/2015] [Indexed: 11/25/2022]
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Woznica D, Ihm J. Unilateral Lower Limb Pain - Law Enforcement Applicant. Med Sci Sports Exerc 2015. [DOI: 10.1249/01.mss.0000477248.13682.91] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Reese M, Ihm J. Ankle Pain - Basketball. Med Sci Sports Exerc 2014. [DOI: 10.1249/01.mss.0000493583.66891.a9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
Osteoarthritis is one of the most frequent and chronic conditions that affect the U.S. population. Use of intra-articular injections is one of the established treatment options available in the nonoperative care for the management of symptomatic osteoarthritis. Common injectable medications include corticosteroids, hyaluronic acid, and other less traditional compounds (for example, botulinum toxin). Corticosteroids work by anti-inflammatory and antinociceptive actions. Corticosteroids have been shown to decrease pain and symptoms associated with osteoarthritis for up to 3 weeks. Hyaluronic acid has an unclear mechanism of action, but it is thought to promote the restoration of hyaluronic acid within an osteoarthritic joint. The efficacy of hyaluronic acid is modest and is most beneficial between 5 and 13 weeks after treatment. Other injectable compounds have been studied and include botulinum toxin type A, which has been theorized to work as an antinociceptive agent. One must be aware of the potential adverse effects associated with these medications. For all of these injectable treatments, the placebo effect must not be overlooked, because it has be demonstrated in multiple studies that these medications provide similar relief of pain when compared with placebo. Image guidance with ultrasound or fluoroscopy may be considered when performing intra-articular injections to improve accurate placement of medication.
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Affiliation(s)
- Farah Hameed
- Department of Physical Medicine and Rehabilitation, Rehabilitation Institute of Chicago, Chicago, IL 60611, USA
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Abstract
Proximal wrist extensor tendinopathy, which is also known as tennis elbow, is pain at or just distal to the lateral humeral epicondyle within the proximal wrist extensor tendon. It occurs commonly in certain athletes but can also occur in people with jobs that require repetitive movements of the hand and upper limb. In most cases the tendon involved shows no signs of inflammation or tendonitis, but instead shows fibroblasts, vascular hyperplasia, and disorganized collagen. Diagnosis is often made by history and physical exam alone. Most people respond to conservative measures including activity modification, analgesics, manipulation of tissue, and exercise. In some cases, an injection of corticosteroid or botulinum toxin may be used. Surgery is rarely needed.
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Affiliation(s)
- Joseph Ihm
- Rehabilitation Institute of Chicago, Chicago, IL, USA.
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Cho E, Im J, Park C, Son WJ, Kim DH, Horii H, Ihm J, Han S. Atomic and electronic structures of amorphous Ge(2)Sb(2)Te(5); melt-quenched versus ideal glasses. J Phys Condens Matter 2010; 22:205504. [PMID: 21393709 DOI: 10.1088/0953-8984/22/20/205504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
To investigate an amorphous structure of Ge(2)Sb(2)Te(5) that satisfies the 8-N rule (so-called 'ideal glass'), we perform alternative melt-quench simulations on Si(2)As(2)Se(5) and replace atoms in the final structure with Ge-Sb-Te. The resulting structures have salient features of the 8-N rule such as the tetrahedral configuration for all Ge atoms and the localized Te lone pairs at the valence top. In addition, the average Ge-Te and Sb-Te distances are in good agreement with experiment. The energetic stability of the ideal glass supports the existence of this amorphous structure that is distinct from the melt-quenched glass. From the analysis of electronic structures and optical dielectric constants, it is concluded that the electronic character of the melt-quenched amorphous Ge(2)Sb(2)Te(5) lies in between the resonant p-bonding of the crystalline phase and the covalent bonding of the ideal glass.
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Affiliation(s)
- E Cho
- Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea
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Darakev G, Awuah Asiamah I, McQuillan G, Darakev N, Fierro M, Ihm J. Identifying residues using 3D coordinates: an application of multiple APIs. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308098577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Margolis S, Ihm J. Hip Pain - Volleyball. Med Sci Sports Exerc 2008. [DOI: 10.1249/01.mss.0000321984.68763.b9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kim SH, Choi WI, Kim G, Song YJ, Jeong GH, Hatakeyama R, Ihm J, Kuk Y. Cesium-filled single wall carbon nanotubes as conducting nanowires: scanning tunneling spectroscopy study. Phys Rev Lett 2007; 99:256407. [PMID: 18233540 DOI: 10.1103/physrevlett.99.256407] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2007] [Indexed: 05/25/2023]
Abstract
Metal-filled single wall carbon nanotubes (SWCNTs) are examined for possible application to conducting wires in nanoelectronics architecture. The local electronic structure of SWCNTs partially filled with cesium atoms is studied with scanning tunneling spectroscopy. The conduction and valence bands are shifted downward with two localized states in the gap at the location where the Cs atoms are filled. From a first-principles calculation, we confirm that these two gap states are bound states originating from the two lowest conduction bands.
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Affiliation(s)
- S H Kim
- Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
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McLean JP, Ihm J, Press J. Bilateral Ankle Pain in a Runner. Med Sci Sports Exerc 2007. [DOI: 10.1249/01.mss.0000273528.99120.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Choe H, Hong MH, Seo Y, Lee K, Kim G, Cho Y, Ihm J, Jhe W. Formation, manipulation, and elasticity measurement of a nanometric column of water molecules. Phys Rev Lett 2005; 95:187801. [PMID: 16383951 DOI: 10.1103/physrevlett.95.187801] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2005] [Indexed: 05/05/2023]
Abstract
Nanometer-sized columns of condensed water molecules are formed by an atomic-resolution force microscope operated in ambient conditions. An unusual stepwise decrease of the force gradient associated with the ultrathin water bridge in the tip-substrate gap is observed during its stretch, exhibiting regularity in step heights (approximately 0.5 N/m) and plateau lengths (approximately 1 nm). Such "quantized" elasticity is indicative of an atomic-scale stick slip at the tip-water interface. A thermodynamic-instability-induced rupture of the water meniscus (5 nm long and 2.6 nm wide) is also found. This work opens a high-resolution study of the structure and interface dynamics of a nanometric aqueous column.
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Affiliation(s)
- H Choe
- School of Physics, Seoul National University, Seoul 151-747, Korea
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Kim H, Lee J, Kahng SJ, Son YW, Lee SB, Lee CK, Ihm J, Kuk Y. Direct observation of localized defect States in semiconductor nanotube junctions. Phys Rev Lett 2003; 90:216107. [PMID: 12786571 DOI: 10.1103/physrevlett.90.216107] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2003] [Indexed: 05/24/2023]
Abstract
We report scanning tunneling microscopy of semiconductor-semiconductor carbon nanotube junctions with different band gaps. Characteristic features of the wave functions at different energy levels, such as a localized defect state, are clearly exhibited in the atomically resolved scanning tunneling spectroscopy. The peaks of the Van Hove singularity on each side penetrate and decay into the opposite side across the junction over a distance of approximately 2 nm. These experimental features are accounted for, with the help of tight-binding calculation, by the presence of pentagon-heptagon pair defects at the junction.
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Affiliation(s)
- Hajin Kim
- School of Physics and Center for Science in Nanometer Scale, Seoul National University, Seoul 151-742, Korea
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Lee J, Kim H, Kahng SJ, Kim G, Son YW, Ihm J, Kato H, Wang ZW, Okazaki T, Shinohara H, Kuk Y. Bandgap modulation of carbon nanotubes by encapsulated metallofullerenes. Nature 2002; 415:1005-8. [PMID: 11875563 DOI: 10.1038/4151005a] [Citation(s) in RCA: 170] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Motivated by the technical and economic difficulties in further miniaturizing silicon-based transistors with the present fabrication technologies, there is a strong effort to develop alternative electronic devices, based, for example, on single molecules. Recently, carbon nanotubes have been successfully used for nanometre-sized devices such as diodes, transistors, and random access memory cells. Such nanotube devices are usually very long compared to silicon-based transistors. Here we report a method for dividing a semiconductor nanotube into multiple quantum dots with lengths of about 10nm by inserting Gd@C82 endohedral fullerenes. The spatial modulation of the nanotube electronic bandgap is observed with a low-temperature scanning tunnelling microscope. We find that a bandgap of approximately 0.5eV is narrowed down to approximately 0.1eV at sites where endohedral metallofullerenes are inserted. This change in bandgap can be explained by local elastic strain and charge transfer at metallofullerene sites. This technique for fabricating an array of quantum dots could be used for nano-electronics and nano-optoelectronics.
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Affiliation(s)
- Jhinhwan Lee
- School of Physics, Seoul National University, Seoul 151-747, Korea
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Jhi SH, Louie SG, Cohen ML, Ihm J. Vacancy hardening and softening in transition metal carbides and nitrides. Phys Rev Lett 2001; 86:3348-3351. [PMID: 11327967 DOI: 10.1103/physrevlett.86.3348] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2000] [Indexed: 05/23/2023]
Abstract
The effects of vacancies on mechanical properties of the transition metal carbides and nitrides are studied using the ab initio pseudopotential approach. Calculated shear elastic stiffness and electronic structures show that the vacancy produces entirely different effects on the mechanical strength of groups IVb nitrides and Vb carbides. It is found that the occupation of shear-unstable metallic dd bonding states changes essentially in an opposite way for the carbides and nitrides in the presence of vacancies, resulting in different responses to shear stress. Our study provides an atomistic understanding of the anomaly in hardness for these substoichiometric materials.
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Affiliation(s)
- S H Jhi
- Department of Physics, University of California at Berkeley, Berkeley, CA 94720, USA
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Yoon YG, Mazzoni MS, Choi HJ, Ihm J, Louie SG. Structural deformation and intertube conductance of crossed carbon nanotube junctions. Phys Rev Lett 2001; 86:688-691. [PMID: 11177913 DOI: 10.1103/physrevlett.86.688] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2000] [Indexed: 05/23/2023]
Abstract
We present a first-principles study of the structure and quantum electronic conductance of junctions consisting of two crossed (5,5) single-walled carbon nanotubes. The structures are determined by constrained minimization of total energy at a given force between the two tubes, simulating the effects of substrate-tube attraction or an applied force. We find that the intertube contact distance is very sensitive to the applied force in the range of 0--10 nN. The intertube conductance is sizable for realistic deformation expected from substrate interaction. The results explain the recent transport data on crossed nanotubes and show that these systems may be potentially useful as electromechanical devices.
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Affiliation(s)
- Y G Yoon
- Department of Physics, University of California at Berkeley, 94720, USA
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Fuhrer MS, Nygard J, Shih L, Forero M, Yoon YG, Mazzoni MS, Choi HJ, Ihm J, Louie SG, Zettl A, McEuen PL. Crossed nanotube junctions. Science 2000; 288:494-7. [PMID: 10775104 DOI: 10.1126/science.288.5465.494] [Citation(s) in RCA: 365] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Junctions consisting of two crossed single-walled carbon nanotubes were fabricated with electrical contacts at each end of each nanotube. The individual nanotubes were identified as metallic (M) or semiconducting (S), based on their two-terminal conductances; MM, MS, and SS four-terminal devices were studied. The MM and SS junctions had high conductances, on the order of 0.1 e(2)/h (where e is the electron charge and h is Planck's constant). For an MS junction, the semiconducting nanotube was depleted at the junction by the metallic nanotube, forming a rectifying Schottky barrier. We used two- and three-terminal experiments to fully characterize this junction.
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Affiliation(s)
- MS Fuhrer
- Department of Physics, University of California at Berkeley and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Department of Physics and Center for Theoretical Physics, Seoul National University
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Choi HJ, Ihm J, Louie SG, Cohen ML. Defects, quasibound states, and quantum conductance in metallic carbon nanotubes. Phys Rev Lett 2000; 84:2917-2920. [PMID: 11018975 DOI: 10.1103/physrevlett.84.2917] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/1999] [Indexed: 05/23/2023]
Abstract
The effects of impurities and local structural defects on the conductance of metallic carbon nanotubes are calculated using an ab initio pseudopotential method within the Landauer formalism. Substitutionally doped boron or nitrogen produces quasibound impurity states of a definite parity and reduces the conductance by a quantum unit (2e(2)/h) via resonant backscattering. These resonant states show strong similarity to acceptor or donor states in semiconductors. The Stone-Wales defect also produces quasibound states and exhibits quantized conductance reduction. In the case of a vacancy, the conductance shows a much more complex behavior than the prediction from the widely used pi-electron tight-binding model.
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Affiliation(s)
- HJ Choi
- Department of Physics and Center for Theoretical Physics, Seoul National University, Seoul 151-742, Korea
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Abstract
Diabetes mellitus is postulated to be associated with increased lipid peroxidation, which may contribute to vascular complications. One potential mechanism of the increased lipid peroxidation in diabetes is lipid-linked advanced glycosylation and oxidation. Aminoguanidine (AMGN), the prototype inhibitor of advanced glycosylation end product (AGE) formation, has been recently shown to prevent oxidative modification of low-density lipoprotein (LDL) in vitro at a moderate concentration. It is unknown whether AMGN may act as an antioxidant against lipid peroxidation under hyperglycemia in vivo. To investigate the in vivo effect of AMGN on lipid peroxidation in diabetes, we administered AMGN (1 g/L in drinking water) or vitamin E (400 mg/d for 5 d/wk) to streptozotocin (STZ)-induced diabetic rats for 9 weeks and measured plasma lipid hydroperoxides by ferrous oxidation with xylenol orange II (FOX method) and red blood cell (RBC) membrane malondialdehyde (MDA) and related aldehydes as thiobarbituric acid-reactive substances (TBARS). Plasma lipid hydroperoxide was higher in STZ-induced diabetic rats versus control rats (mean +/- SD, 7.53 +/- 2.03 v 5.62 +/- 0.44 micromol/L, P < .05; n = 8 to 14). RBC membrane TBARS were also higher in STZ-induced diabetic rats than in control rats (2.67 +/- 0.46 v 1.81 +/- 0.19 nmol/mL, P < .05). Plasma lipid hydroperoxide was lower in AMGN-treated (6.23 +/- 0.59 micromol/L, P < .05) and vitamin E-treated (5.29 +/- 0.27 micromol/L, P < .05) diabetic rats than in untreated diabetic rats. RBC membrane TBARS were also lower in AMGN-treated (1.93 +/- 0.12 nmol/mL, P < .05) diabetic rats than in untreated diabetic rats. There was no significant difference in plasma glucose, cholesterol, and triglyceride levels among diabetic groups. Although the mechanism(s) of action of AMGN on lipid peroxidation in vivo should be studied further, these results suggest that AMGN may have an additional beneficial effect as an antioxidant against lipid peroxidation in a prevention trial for diabetic vascular complications.
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Affiliation(s)
- S H Ihm
- Department of Internal Medicine, College of Medicine, Hallym University, Seoul, South Korea
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Jhi SH, Ihm J. Dynamical simulation of optical phonon transfer in the GaAs/AlxGa1-xAs/GaAs single-barrier structure. Phys Rev B Condens Matter 1996; 54:16385-16388. [PMID: 9985750 DOI: 10.1103/physrevb.54.16385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kim DS, Ko HS, Kim YM, Rhee SJ, Hohng SC, Yee YH, Kim WS, Woo JC, Choi HJ, Ihm J, Woo DH, Kang KN. Percolation of carriers through low potential channels in thick AlxGa1-xAs (x<0.35) barriers. Phys Rev B Condens Matter 1996; 54:14580-14588. [PMID: 9985465 DOI: 10.1103/physrevb.54.14580] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Young MR, Lozano Y, Ihm J, Wright MA, Prechel MM. Vitamin D3 treatment of tumor bearers can stimulate immune competence and reduce tumor growth when treatment coincides with a heightened presence of natural suppressor cells. Cancer Lett 1996; 104:153-61. [PMID: 8665483 DOI: 10.1016/0304-3835(96)04241-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
By secreting granulocyte-macrophage colony-stimulating factor (GM-CSF), Lewis lung carcinoma tumors induce immune suppressive granulocyte-macrophage progenitor cells. Treating mice having established tumors and high levels of suppressor activity with vitamin D3 eliminated suppressor activity, increased anti-tumor immunity, induced an immune stimulatory cell population, and reduced tumor growth. When instead, the vitamin D3 treatment was initiated earlier, when implanted tumors first became detectable and when natural suppressor activity was less prominent, the treatment had no effect. Thus, vitamin D3 treatment can stimulate the immune competence of tumor bearers when treatment is targeted to coincide with a heightened presence of GM-CSF-induced suppressor cells.
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Affiliation(s)
- M R Young
- Research Service (151-Z2), Hines VA Hospital, IL 60141, USA. ryoung@bsd. meddean.luc.edu
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Prechel MM, Lozano Y, Wright MA, Ihm J, Young MR. Immune modulation by interleukin-12 in tumor-bearing mice receiving vitamin D3 treatments to block induction of immunosuppressive granulocyte/macrophage progenitor cells. Cancer Immunol Immunother 1996; 42:213-20. [PMID: 8665568 PMCID: PMC11037763 DOI: 10.1007/s002620050273] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Lewis lung carcinoma (LLC-LN7) tumors stimulate myelopoiesis and increase the presence of granulocyte/macrophage (GM) progenitor cells having natural suppressor activity. Treatment of these tumor-bearing mice with interleukin-12 (IL-12) resulted in minimal immune modulation. The objective of this study was to determine whether eliminating natural suppressor activity would allow for immune stimulation by IL-12. Treatment of LLC-LN7 tumor-bearing mice with vitamin D3 eliminated natural suppressor activity. In mice that were first treated with vitamin D3 and then also with IL-12, there was stimulation of splenic T cell proliferation in response to immobilized anti-CD3 plus IL-2. In addition, spleen and lymph node cells from vitamin-D3/IL-12-treated tumor-bearing mice became stimulated in response to autologous tumor to produce interferon gamma (IFN gamma), although IL-2 production was not stimulated. A prominent effect of the combined vitamin-D3/IL-12 treatment regimen was the synergistic augmentation of autologous tumor-specific cytolytic activity within the regional lymph nodes. The generation of these tumor-specific effector cells required the presence of the tumor mass since such activity was not elicited in the lymph nodes of mice from which the tumors had been surgically excised. The results of this study show that, after treatment of tumor bearers with vitamin D3 to eliminate GM-suppressor cells, IL-12 can induce select regional antitumor immune responses, particularly IFN gamma production and cytolysis by regional lymph node cells of autologous tumor.
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Affiliation(s)
- M M Prechel
- Research Service, Hines VA Hospital, IL 60141, USA
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Lee GD, Ihm J. Microscopic study of the pressure-induced structural phase transition of ZnTe. Phys Rev B Condens Matter 1996; 53:R7622-R7625. [PMID: 9982282 DOI: 10.1103/physrevb.53.r7622] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kim H, Hwang CD, Ihm J. Ab initio pseudopotential calculations for the electronic structure of low-Tc LuNi2B2C and the related compound LuNiBC. Phys Rev B Condens Matter 1995; 52:4592-4596. [PMID: 9981596 DOI: 10.1103/physrevb.52.4592] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lee GD, Lee MH, Ihm J. Role of d electrons in the zinc-blende semiconductors ZnS, ZnSe, and ZnTe. Phys Rev B Condens Matter 1995; 52:1459-1462. [PMID: 9981194 DOI: 10.1103/physrevb.52.1459] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Young MR, Ihm J, Lozano Y, Wright MA, Prechel MM. Treating tumor-bearing mice with vitamin D3 diminishes tumor-induced myelopoiesis and associated immunosuppression, and reduces tumor metastasis and recurrence. Cancer Immunol Immunother 1995; 41:37-45. [PMID: 7641218 PMCID: PMC11037780 DOI: 10.1007/bf01788958] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/1995] [Accepted: 03/29/1995] [Indexed: 01/26/2023]
Abstract
Metastatic Lewis lung carcinoma (LLC-LN7) tumors that secrete granulocyte/macrophage-colony-stimulating factor (GM-CSF) stimulate myelopoiesis and induce bone marrow-derived immunosuppressor cells that are homologous to granulocyte/macrophage progenitor cells. In vitro treatment of the LLC-LN7 cells with 1 alpha,25-dihydroxyvitamin D3 reduced tumor cell production of suppressor-inducing activity, although suppressor-inducing activity could be restored by reconstituting the tumor supernatants with recombinant GM-CSF. Treatment of mice having LLC-LN7 tumors with vitamin D3 reduced tumor production of GM-CSF and the frequency of myeloid progenitor cells. This was associated with a reduction in immunosuppressor activity and an increase in T cell function. Vitamin D3 treatment of mice having palpable tumors transiently retarded tumor growth, but caused a prominent reduction in tumor metastasis. Treating mice with vitamin D3 after tumor excision resulted in a reduction in the tumor-induced myelopoietic stimulation and associated immunosuppressive activity, and enhanced T cell function. These mice had a markedly reduced incidence of tumor recurrence. The results of this study suggest that vitamin D3 treatment of mice with GM-CSF-secreting tumors can interrupt the myelopoiesis-associated immunosuppressor cascade and, in turn, reduce tumor metastasis and recurrence.
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Affiliation(s)
- M R Young
- Research Service (151-Z2), Department of Veterans Affairs, Hines VA Hospital, IL 60141, USA
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Prechel MM, Lozano Y, Wright MA, Ihm J, Young MR. Ineffective immune enhancement by IL-12 in tumor-bearing mice whose immune depression is mediated by suppressive granulocyte-macrophage progenitor cells. Cancer Lett 1995; 92:235-42. [PMID: 7600536 DOI: 10.1016/0304-3835(95)03804-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Lewis lung carcinoma (LLC-LN7) tumors stimulate myelopoiesis and induce immunosuppressive granulocyte-macrophage (GM)-progenitor cells. Treating mice having palpable tumors with IL-12 enhanced the frequency of GM-progenitors and did not diminish GM-suppressor activity. Proliferation of splenic T-cells of tumor-bearers to Con-A or to anti-CD3 plus IL-2 was suppressed; this was not enhanced by IL-12 treatment. Also not stimulated was T-cell secretion of IL-2 in response to autologous tumor, or the intratumoral T-cell content. IL-12 slightly increased splenic IFN-gamma secretion, and increased cytotoxicity of lymph node (but not spleen) cells toward autologous tumor. In these tumor-bearing mice that were immune depressed as a result of GM-suppressor cells, immune modulatory effects of IL-12 were marginal and did not affect tumor size or metastasis.
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Affiliation(s)
- M M Prechel
- Research Service, Hines VA Hospital, IL 60141, USA
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Kim H, Ihm J. Ab initio pseudopotential plane-wave calculations of the electronic structure of YBa2Cu3O7. Phys Rev B Condens Matter 1995; 51:3886-3892. [PMID: 9979208 DOI: 10.1103/physrevb.51.3886] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yu BD, Kim H, Ihm J. Phenomenological model of high-Tc cuprate superconductors including interlayer interactions. Phys Rev B Condens Matter 1992; 45:8007-8015. [PMID: 10000609 DOI: 10.1103/physrevb.45.8007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ihm J. Berry's phase originated from the broken time-reversal symmetry: Theory and application to anyon superconductivity. Phys Rev Lett 1991; 67:251-254. [PMID: 10044533 DOI: 10.1103/physrevlett.67.251] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ihm J, Yu BD. Effects of interlayer interactions on the critical temperature of high-Tc compounds. Phys Rev B Condens Matter 1989; 39:4760-4763. [PMID: 9948850 DOI: 10.1103/physrevb.39.4760] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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