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Wulff G, Knorr K. Stoichiometric noncovalent interaction in molecular imprinting. BIOSEPARATION 2003; 10:257-76. [PMID: 12549870 DOI: 10.1023/a:1021585518592] [Citation(s) in RCA: 119] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In this review article the function of the binding site monomers in the molecular imprinting procedure is discussed. Especially, new developments towards stoichiometric noncovalent interactions are highlighted. In stoichiometric noncovalent interactions template and binding site monomer in an 1:1 molar ratio are nearly completely bound to each other. This is only possible if the association constants are considerably high (Kass > 900 M(-1)). Using this type of interaction in molecular imprinting no excess of binding sites is necessary and binding sites are only located inside the imprinted cavity. Since all cavities can be reloaded these polymers show high capacity (e.g., for preparative application) and are especially suited for the synthesis of catalytically active imprinted polymers. Discussed are binding site interactions based on amidines (and guanidines), multiple hydrogen bonding, charge-transfer interactions, and host-guest inclusion. The systematic investigation of the underlying binding reaction is described in detail. With low-molecular weight model substances the thermodynamics of the association can be conveniently investigated, e.g., by NMR spectroscopy.
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Review |
22 |
119 |
2
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Heger G, Mullen D, Knorr K. On the second-order phase transition in (CH3NH3)2MnCl4. A single-crystal neutron diffraction study at 404 and 293 K. ACTA ACUST UNITED AC 1975. [DOI: 10.1002/pssa.2210310214] [Citation(s) in RCA: 94] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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50 |
94 |
3
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Wallacher D, Künzner N, Kovalev D, Knorr N, Knorr K. Capillary condensation in linear mesopores of different shape. PHYSICAL REVIEW LETTERS 2004; 92:195704. [PMID: 15169420 DOI: 10.1103/physrevlett.92.195704] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2003] [Indexed: 05/24/2023]
Abstract
The hysteresis and kinetics of capillary condensation of N2 and Ar in linear mesopores, produced by etching of Si wafers, have been studied for different pore shapes, including the ink bottle geometry. Pore blocking has been observed in the solid state of the pore fillings, but not in the liquid state. We conclude that individual local geometries such as the pore mouth, a blind end, or a single constriction have no effect on the shape of sorption isotherms, that the pore space should be regarded as a statistical ensemble of pore segments with a lot of quenched disorder.
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21 |
88 |
4
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Töpler J, Buchner H, Säufferer H, Knorr K, Prandl W. Measurements of the diffusion of hydrogen atoms in magnesium and Mg2Ni by neutron scattering. ACTA ACUST UNITED AC 1982. [DOI: 10.1016/0022-5088(82)90248-x] [Citation(s) in RCA: 86] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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43 |
86 |
5
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Heger G, Mullen D, Knorr K. On the importance of hydrogen bonding for the structural phase transitions in (CH3NH3)2MnCl4. A single-crystal neutron diffraction study. ACTA ACUST UNITED AC 1976. [DOI: 10.1002/pssa.2210350225] [Citation(s) in RCA: 72] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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49 |
72 |
6
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Inoue D, Polaski JT, Taylor J, Castel P, Chen S, Kobayashi S, Hogg SJ, Hayashi Y, Pineda JMB, El Marabti E, Erickson C, Knorr K, Fukumoto M, Yamazaki H, Tanaka A, Fukui C, Lu SX, Durham BH, Liu B, Wang E, Mehta S, Zakheim D, Garippa R, Penson A, Chew GL, McCormick F, Bradley RK, Abdel-Wahab O. Minor intron retention drives clonal hematopoietic disorders and diverse cancer predisposition. Nat Genet 2021; 53:707-718. [PMID: 33846634 PMCID: PMC8177065 DOI: 10.1038/s41588-021-00828-9] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 02/24/2021] [Indexed: 12/13/2022]
Abstract
Most eukaryotes harbor two distinct pre-mRNA splicing machineries: the major spliceosome, which removes >99% of introns, and the minor spliceosome, which removes rare, evolutionarily conserved introns. Although hypothesized to serve important regulatory functions, physiologic roles of the minor spliceosome are not well understood. For example, the minor spliceosome component ZRSR2 is subject to recurrent, leukemia-associated mutations, yet functional connections among minor introns, hematopoiesis and cancers are unclear. Here, we identify that impaired minor intron excision via ZRSR2 loss enhances hematopoietic stem cell self-renewal. CRISPR screens mimicking nonsense-mediated decay of minor intron-containing mRNA species converged on LZTR1, a regulator of RAS-related GTPases. LZTR1 minor intron retention was also discovered in the RASopathy Noonan syndrome, due to intronic mutations disrupting splicing and diverse solid tumors. These data uncover minor intron recognition as a regulator of hematopoiesis, noncoding mutations within minor introns as potential cancer drivers and links among ZRSR2 mutations, LZTR1 regulation and leukemias.
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Research Support, N.I.H., Extramural |
4 |
69 |
7
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Wiehl L, Spiering H, Gütlich P, Knorr K. Calculation of the lattice deformation at the phase transitions of [Fe(ptz)6](BF4)2from powder diffraction patterns. J Appl Crystallogr 1990. [DOI: 10.1107/s0021889889014020] [Citation(s) in RCA: 67] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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35 |
67 |
8
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Escobar-Hoyos L, Knorr K, Abdel-Wahab O. Aberrant RNA Splicing in Cancer. ANNUAL REVIEW OF CANCER BIOLOGY-SERIES 2018; 3:167-185. [PMID: 32864546 DOI: 10.1146/annurev-cancerbio-030617-050407] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
RNA splicing, the enzymatic process of removing segments of premature RNA to produce mature RNA, is a key mediator of proteome diversity and regulator of gene expression. Increased systematic sequencing of the genome and transcriptome of cancers has identified a variety of means by which RNA splicing is altered in cancer relative to normal cells. These findings, in combination with the discovery of recurrent change-of-function mutations in splicing factors in a variety of cancers, suggest that alterations in splicing are drivers of tumorigenesis. Greater characterization of altered splicing in cancer parallels increasing efforts to pharmacologically perturb splicing and early-phase clinical development of small molecules that disrupt splicing in patients with cancer. Here we review recent studies of global changes in splicing in cancer, splicing regulation of mitogenic pathways critical in cancer transformation, and efforts to therapeutically target splicing in cancer.
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Journal Article |
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61 |
9
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Knorr K, Loidl A. X-ray diffraction on (KBr)1-x(KCN)x mixed crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1985; 31:5387-5392. [PMID: 9936505 DOI: 10.1103/physrevb.31.5387] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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40 |
59 |
10
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Gro� W, Knorr K, Murani AP, Buschow KHJ. Crystal field splitting of some rare earth intermetallic compounds with Cu3Au structure. ACTA ACUST UNITED AC 1980. [DOI: 10.1007/bf01365368] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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45 |
59 |
11
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Elschner S, Knorr K, Loidl A. Phases and phase transitions of (NaCl)1?x(NaCN)x. ACTA ACUST UNITED AC 1985. [DOI: 10.1007/bf01307778] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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40 |
47 |
12
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Taylor J, Mi X, North K, Binder M, Penson A, Lasho T, Knorr K, Haddadin M, Liu B, Pangallo J, Benbarche S, Wiseman D, Tefferi A, Halene S, Liang Y, Patnaik MM, Bradley RK, Abdel-Wahab O. Single-cell genomics reveals the genetic and molecular bases for escape from mutational epistasis in myeloid neoplasms. Blood 2020; 136:1477-1486. [PMID: 32640014 PMCID: PMC7515689 DOI: 10.1182/blood.2020006868] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 07/06/2020] [Indexed: 12/13/2022] Open
Abstract
Large-scale sequencing studies of hematologic malignancies have revealed notable epistasis among high-frequency mutations. One of the most striking examples of epistasis occurs for mutations in RNA splicing factors. These lesions are among the most common alterations in myeloid neoplasms and generally occur in a mutually exclusive manner, a finding attributed to their synthetic lethal interactions and/or convergent effects. Curiously, however, patients with multiple-concomitant splicing factor mutations have been observed, challenging our understanding of one of the most common examples of epistasis in hematologic malignancies. In this study, we performed bulk and single-cell analyses of patients with myeloid malignancy who were harboring ≥2 splicing factor mutations, to understand the frequency and basis for the coexistence of these mutations. Although mutations in splicing factors were strongly mutually exclusive across 4231 patients (q < .001), 0.85% harbored 2 concomitant bona fide splicing factor mutations, ∼50% of which were present in the same individual cells. However, the distribution of mutations in patients with double mutations deviated from that in those with single mutations, with selection against the most common alleles, SF3B1K700E and SRSF2P95H/L/R, and selection for less common alleles, such as SF3B1 non-K700E mutations, rare amino acid substitutions at SRSF2P95, and combined U2AF1S34/Q157 mutations. SF3B1 and SRSF2 alleles enriched in those with double-mutations had reduced effects on RNA splicing and/or binding compared with the most common alleles. Moreover, dual U2AF1 mutations occurred in cis with preservation of the wild-type allele. These data highlight allele-specific differences as critical in regulating the molecular effects of splicing factor mutations as well as their cooccurrences/exclusivities with one another.
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Research Support, N.I.H., Extramural |
5 |
45 |
13
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Henschel A, Hofmann T, Huber P, Knorr K. Preferred orientations and stability of medium length n-alkanes solidified in mesoporous silicon. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 75:021607. [PMID: 17358353 DOI: 10.1103/physreve.75.021607] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2006] [Indexed: 05/14/2023]
Abstract
The n-alkanes C(16)H(34), C(17)H(36), C(19)H(40), and C(25)H(52) have been imbibed and solidified in mesoporous, crystalline silicon with a mean pore diameter of 10 nm. The structures and phase sequences have been determined by x-ray diffractometry. Apart from a reduction and the hysteresis of the melting-freezing transition, we find a set of six discrete orientation states ("domains") of the confined alkane crystals with respect to the lattice of the silicon host. The growth process responsible for the domain selection is interpreted as a nanoscale version of the Bridgman technique known from single-crystal growth. Oxidation of the pore walls leads to extrusion of the hydrocarbons upon crystallization, whereas the solidified n-alkanes investigated in nonoxidized, porous silicon are thermodynamically stable.
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41 |
14
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Wang E, Pineda JMB, Kim WJ, Chen S, Bourcier J, Stahl M, Hogg SJ, Bewersdorf JP, Han C, Singer ME, Cui D, Erickson CE, Tittley SM, Penson AV, Knorr K, Stanley RF, Rahman J, Krishnamoorthy G, Fagin JA, Creger E, McMillan E, Mak CC, Jarvis M, Bossard C, Beaupre DM, Bradley RK, Abdel-Wahab O. Modulation of RNA splicing enhances response to BCL2 inhibition in leukemia. Cancer Cell 2023; 41:164-180.e8. [PMID: 36563682 PMCID: PMC9839614 DOI: 10.1016/j.ccell.2022.12.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 10/07/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022]
Abstract
Therapy resistance is a major challenge in the treatment of cancer. Here, we performed CRISPR-Cas9 screens across a broad range of therapies used in acute myeloid leukemia to identify genomic determinants of drug response. Our screens uncover a selective dependency on RNA splicing factors whose loss preferentially enhances response to the BCL2 inhibitor venetoclax. Loss of the splicing factor RBM10 augments response to venetoclax in leukemia yet is completely dispensable for normal hematopoiesis. Combined RBM10 and BCL2 inhibition leads to mis-splicing and inactivation of the inhibitor of apoptosis XIAP and downregulation of BCL2A1, an anti-apoptotic protein implicated in venetoclax resistance. Inhibition of splicing kinase families CLKs (CDC-like kinases) and DYRKs (dual-specificity tyrosine-regulated kinases) leads to aberrant splicing of key splicing and apoptotic factors that synergize with venetoclax, and overcomes resistance to BCL2 inhibition. Our findings underscore the importance of splicing in modulating response to therapies and provide a strategy to improve venetoclax-based treatments.
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Research Support, N.I.H., Extramural |
2 |
40 |
15
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Ferre J, Pommier J, Renard J, Knorr K. Magnetic properties of an amorphous insulating spin glass: manganese aluminosilicate. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/13/19/012] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25 |
36 |
16
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Loidl A, Knorr K, Knopp G, Krimmel A, Caspary R, Böhm A, Sparn G, Geibel C, Steglich F, Murani AP. Neutron-scattering studies on CeM2Ge2(M=Ag, Au, and Ru). PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:9341-9351. [PMID: 10002738 DOI: 10.1103/physrevb.46.9341] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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33 |
35 |
17
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Volkmann UG, Böhmer R, Loidl A, Knorr K, Höchli UT, Haussühl S. Dipolar and quadrupolar freezing in (KBr)1-x(KCN)x. PHYSICAL REVIEW LETTERS 1986; 56:1716-1719. [PMID: 10032750 DOI: 10.1103/physrevlett.56.1716] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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39 |
33 |
18
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43 |
32 |
19
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Lethuillier P, Pierre J, Knorr K, Drexel W. Crystal fields and magnetic properties of NdSn3, NdPb 3 and Ndin3. ACTA ACUST UNITED AC 1975. [DOI: 10.1051/jphys:01975003604032900] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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50 |
32 |
20
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Huber P, Soprunyuk VP, Knorr K. Structural transformations of even-numbered n-alkanes confined in mesopores. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2006; 74:031610. [PMID: 17025646 DOI: 10.1103/physreve.74.031610] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2006] [Indexed: 05/12/2023]
Abstract
The n-alkanes C12H26, C14H30, and C16H34 have been imbibed and solidified in mesoporous Vycor glass with a mean pore diameter of 10 nm. The samples have been investigated by x-ray diffractometry and calorimetric measurements. The structures and phase sequences have been determined. Apart from a reduction and the hysteresis of the melting-freezing transition, pore-confined C12 reproduces the liquid-triclinic phase sequence of the bulk material, but for C16 an orthorhombic rotator mesophase appears that in the bulk state is absent for C16 but well known from odd-numbered alkanes of similar length. In pore-confined C14 this phase shows up on cooling but not on heating.
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21
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Loidl A, Schräder T, Böhmer R, Knorr K, Kjems JK, Born R. Dipolar and quadrupolar freezing in (NaCN)1-x(KCN)x. PHYSICAL REVIEW. B, CONDENSED MATTER 1986; 34:1238-1249. [PMID: 9939742 DOI: 10.1103/physrevb.34.1238] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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39 |
30 |
22
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Nagele W, Knorr K, Prandtl W, Convert P, Buevoz JL. Neutron scattering study of spin correlations and phase transitions in amorphous manganese aluminosilicates. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/11/15/028] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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24 |
29 |
23
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Nicolaisen M, Justesen A, Knorr K, Wang J, Pinnschmidt H. Fungal communities in wheat grain show significant co-existence patterns among species. FUNGAL ECOL 2014. [DOI: 10.1016/j.funeco.2014.06.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11 |
27 |
24
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Loidl A, Knorr K, Daubert J, Dultz W, Fitzgerald WJ. Inelastic neutron scattering by coupled rotational and translational modes in KCN. ACTA ACUST UNITED AC 1980. [DOI: 10.1007/bf01598756] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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45 |
27 |
25
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Loidl A, Knorr K, Rowe JM, McIntyre GJ. Glass and phase transitions in (KBr)1-x(KCN)x. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:389-398. [PMID: 9943586 DOI: 10.1103/physrevb.37.389] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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37 |
25 |