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Effect of seasons upon intraocular pressure in healthy population of China. KOREAN JOURNAL OF OPHTHALMOLOGY 1996; 10:29-33. [PMID: 8755199 DOI: 10.3341/kjo.1996.10.1.29] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Studies have been shown that intraocular pressure (IOP) shows a seasonal variation, but amount of change differs from study to study. The variability in their results may be due to negligence of factors that can affect IOP. Due to differences in environmental conditions of China than other countries, we investigated seasonal variations in IOP of 103 healthy male Chinese of Shanghai. IOP was measured each month over the course of fourteen months with the Goldmann applanation tonometer. The average intraocular pressures in the winter months were higher than those in the spring, summer, and autumn months. The IOP difference between winter and summer months was found to be 1.4 +/- 0.7 mmHg. This study confirms that season influences IOP. As compared to other nations, effect of seasons on IOP seems to be somewhat less pronounced in Chinese. The possible mechanisms, responsible for the seasonal variation of intraocular pressure, are also postulated.
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Anisotropy and Lorentz-force dependence of the critical currents in YBa2Cu3O7- delta thick films deposited on nickel-alloy substrates. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:R9875-R9878. [PMID: 9980136 DOI: 10.1103/physrevb.52.r9875] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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53
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Measurements of magnetic screening lengths in superconducting Nb thin films by polarized neutron reflectometry. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:10395-10404. [PMID: 9980092 DOI: 10.1103/physrevb.52.10395] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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54
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Density of normal carriers below Tc and thermal resistance of twin boundaries in YBa2Cu3O7-x single crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:7192-7194. [PMID: 9974686 DOI: 10.1103/physrevb.50.7192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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55
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[Clinical analysis of 150 cases with periampullary carcinoma]. ZHONGHUA ZHONG LIU ZA ZHI [CHINESE JOURNAL OF ONCOLOGY] 1993; 15:296-9. [PMID: 7909747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
This article reported 150 cases of patients with periampullary carcinoma, among which cancer of 85 cases was in the head of pancreas, 26 in lower part of the common bile-duct, and 21 in ampulla of Vater and 18 in duodenal papilla. In 150 patients, pancreatoduodenectomy was performed in 53 cases but one had total pancreatectomy with a total resection rate of 36%. Resectability was high with cancer in ampulla and duodenal papilla, with a resection rate of 89.5% and 83.3%, respectively. The lowest resection rate, 14.1%, was in patients with cancer in head of the pancreas. Twenty cases had postoperative complications, the morbidity rate was 13.3%. Postoperative death occurred in 9 cases with a mortality rate of 6%. The resection group and non-resection group had 7.5 percent and 5.2 percent of the mortality respectively. Following-up showed that the 3 year and 5 year survival rates were 31.8% and 11.8% respectively. Fifty-four cases with resections had a mean survival period of 16.7 months. Ampullary carcinoma group had the longest survival period, 22.4 months, but non-resection group, all had bile-intestinal shunt, only 4.8 months.
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56
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Correspondence between microwave and submillimeter absorptivity in epitaxial thin films of YBa2Cu3O7. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:8076-8088. [PMID: 10004818 DOI: 10.1103/physrevb.47.8076] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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57
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Hall angle in YBa2Cu3O7- delta epitaxial films: Comparison between oxygen reduction and Pr doping. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:5516-5519. [PMID: 10006734 DOI: 10.1103/physrevb.47.5516] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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58
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Myasthenia gravis: effect on antibody binding of conservative substitutions of amino acid residues forming the main immunogenic region of the nicotinic acetylcholine receptor. JOURNAL OF RECEPTOR RESEARCH 1993; 13:863-79. [PMID: 8463998 DOI: 10.3109/10799899309073698] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In Myasthenia Gravis most anti-acetylcholine receptor (AChR) antibodies are against a highly conserved area of the AChR alpha-subunit called the Main Immunogenic Region (MIR). Amino acid residues critical for MIR formation have been located within the sequence alpha 67-76. In the present study, binding of anti-AChR monoclonal antibodies (mAbs) to synthetic peptide analogues of the sequence alpha 67-76 of human and Torpedo AChRs containing conservative single-residue substitutions identified the amino acid residues most important to the antigenicity of the MIR sequence, and offered clues to its tridimensional structure. Conservative substitutions of residues Asn68 and Asp71 greatly diminished mAb binding, identifying them as critical contact residues for anti-MIR mAbs. Substitutions at Asp70 and Tyr72 moderately affected binding. Cross-reactive mAbs originally raised against Electrophorus AChR bound single residue-substituted synthetic peptides in a manner consistent with the possibility that Electrophorus AChR may have a glutamic acid residue at position alpha 70 or alpha 71. Substitutions at residues Asp/Ala70 and Val/Ile70 between human and Torpedo alpha-subunits may be size-compensating, suggesting these amino acids in the native AChR may be in closer proximity than proposed in previous models of the MIR.
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59
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Capture of gypsy moth,Lymantria dispar (L.), andLymantria mathura (L.) males in traps baited with disparlure enantiomers and olefin precursor in the People's Republic of China. J Chem Ecol 1992; 18:2153-9. [PMID: 24254863 DOI: 10.1007/bf00984942] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/1989] [Accepted: 07/22/1992] [Indexed: 11/29/2022]
Abstract
Pheromone traps baited with (+)-disparlure,cis-7,8-epoxy-2methyocta-decane, captured males ofLymantria dispar, L. monacha, andL. mathura in northeastern People's Republic of China.L. dispar responded to the addition of olefin to (+)-disparlure-baited traps in a negative doseresponse manner. Observations on site and seasonal capture ofL. dispar andL. mathura are discussed.
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Myasthenia gravis. CD4+ T epitopes on the embryonic gamma subunit of human muscle acetylcholine receptor. J Clin Invest 1992; 90:1558-67. [PMID: 1383275 PMCID: PMC443203 DOI: 10.1172/jci116024] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
In myasthenia gravis (MG) an autoimmune response against muscle acetylcholine receptor (AChR) occurs. Embryonic muscle AChR contains a gamma subunit, substituted in adult muscle by a homologous epsilon subunit. Antibodies and CD4+ cells specific for embryonic AChR have been demonstrated in MG patients. We identified sequence segments of the human gamma subunit forming epitopes recognized by four embryonic AChR-specific CD4+ T cell lines, propagated from MG patients' blood by stimulation with synthetic peptides corresponding to the human gamma subunit sequence. Each line had an individual epitope repertoire, but two 20-residue sequence regions were recognized by three lines of different HLA haplotype. Most T epitope sequences were highly diverged between the gamma and the other AChR subunits, confirming the specificity of the T cells for embryonic AChR. These T cells may have been sensitized against AChR expressed by a tissue other than innervated skeletal muscle, possibly the thymus, which expresses an embryonic muscle AChR-like protein, containing a gamma subunit. Several sequence segments forming T epitopes are similar to regions of microbial and/or mammalian proteins unrelated to the AChR. These findings are consistent with the possibility that T cell cross-reactivity between unrelated proteins ("molecular mimicry"), proposed as a cause of autoimmune responses, is not a rare event.
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61
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CD4+ T-epitope repertoire on the human acetylcholine receptor alpha subunit in severe myasthenia gravis: a study with synthetic peptides. Neurology 1992; 42:1092-100. [PMID: 1374548 DOI: 10.1212/wnl.42.5.1092] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The alpha subunit of the nicotinic acetylcholine receptor (AChR) seems crucial in the pathogenesis of the autoimmune paralysis myasthenia gravis (MG) because it contains both the epitopes that dominate the antibody response against the AChR and those recognized by CD4+ AChR-specific T helper (Th) cells. To define the repertoire of anti-AChR Th cells, we investigated the response of unselected blood CD4+ cells or total lymphocytes, or both, from 22 MG patients to 20-residue overlapping synthetic peptides, screening the complete sequence of human-muscle AChR alpha subunit. Several epitopes were identified. Only the most severely affected patients recognized alpha subunit epitopes, and they were mainly young women. Detection of in vitro AChR-specific CD4+ response was facilitated by removal of the CD8+ cells because in two patients a clear response to several alpha subunit peptide sequences could be detected when CD(8+)-depleted cells were used, while their total peripheral blood mononuclear cell population did not respond to any alpha subunit peptide. Although each patient had a unique pattern of peptide recognition, four immunodominant regions recognized by long-term AChR-specific CD4+ T-cell lines, or flanking peptide sequences, were recognized most frequently (residues 48-67, 101-137, 293-337, and 308-437).
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62
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Scaling of the longitudinal and Hall resistivities from vortex motion in YBa2Cu3O7. PHYSICAL REVIEW LETTERS 1992; 68:690-693. [PMID: 10045965 DOI: 10.1103/physrevlett.68.690] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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63
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Abstract
A computer-controlled stereotaxic radiotherapy system based on a low-frequency magnetic field technology integrated with a single fixation point stereotaxic guide has been designed and instituted. The magnetic field, generated in space by a special field source located in the accelerator gantry, is digitized in real time by a field sensor that is six degree-of-freedom measurement device. As this sensor is an integral part of the patient stereotaxic halo, the patient position (x, y, z) and orientation (azimuth, elevation, roll) within the accelerator frame of reference are always known. Six parameters--three coordinates and three Euler space angles--are continuously transmitted to a computer where they are analyzed and compared with the stereotaxic parameters of the target point. Hence, the system facilitates rapid and accurate patient set-up for stereotaxic treatment as well as monitoring of patient during the subsequent irradiation session. The stereotaxic system has been developed to promote the integration of diagnostic and therapeutic procedures, with the specific aim of integrating CT and/or MR aided tumor localization and long term (4- to 7-week) fractionated radiotherapy of small intracranial and ocular lesions.
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Structural determinants within residues 180-199 of the rodent alpha 5 nicotinic acetylcholine receptor subunit involved in alpha-bungarotoxin binding. Biochemistry 1991; 30:10730-8. [PMID: 1931993 DOI: 10.1021/bi00108a018] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Synthetic peptides corresponding to sequence segments of the nicotinic acetylcholine receptor (nAChR) alpha subunits have been used to identify regions that contribute to formation of the binding sites for cholinergic ligands. We have previously defined alpha-bungarotoxin (alpha-BTX) binding sequences between residues 180 and 199 of a putative rat neuronal nAChR alpha subunit, designated alpha 5 [McLane, K. E., Wu, X., & Conti-Tronconi, B. M. (1990) J. Biol. Chem. 265, 9816-9824], and between residues 181 and 200 of the chick neuronal alpha 7 and alpha 8 subunits [McLane, K. E., Wu, X., Schoepfer, R., Lindstrom, J., & Conti-Tronconi, B. M. (1991) J. Biol. Chem. (in press)]. These sequences are relatively divergent compared with the Torpedo and muscle nAChR alpha 1 alpha-BTX binding sites, which indicates a serious limitation of predicting functional domains of proteins based on homology in general. Given the highly divergent nature of the alpha 5 sequence, we were interested in determining the critical amino acid residues for alpha-BTX binding. In the present study, the effects of single amino acid substitutions of Gly or Ala for each residue of the rat alpha 5(180-199) sequence were tested, using a competition assay, in which peptides compete for 125I-alpha-BTX binding with native Torpedo nAChR.(ABSTRACT TRUNCATED AT 250 WORDS)
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Abstract
Computer controlled high dose-rate (HDR) brachytherapy afterloading machines are equipped with a single, miniaturized, high activity Ir-192 source that can be rapidly moved in fine increments among several channels. Consequently, by appropriate programming of source dwell positions and times, the dose distribution can be optimized as desired. We have explored the optimization potential of this new technology for two applications: (a) cervix brachytherapy, and (b) transvaginal irradiation. Cervix brachytherapy with a gynecologic ring applicator was simulated by 48 sources of relative activities ranging from 0.17 to 1.00 that were equally distributed between the tandem and the ring. The results confirmed that the optimized distribution of physical doses are superior to those achievable with standard brachytherapy sources and applicators. For example, with five-point optimization, the relative dose-rate in the rectum was only 47% of that in point A; for standard application the dose rate was 47% higher. For transvaginal application 27 sources of relative activities between 0.07-0.79 were placed in the ring and a single source of unit strength in the tandem. Using dose distribution homogeneity as an optimization criterion, the results (+/- 2.5%) were again superior to those obtained for commonly used double ovoid (+/- 15%), linear cylinder (+/- 27%), or a "T" source (31%).
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66
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The I-Abm12 mutation, which confers resistance to experimental myasthenia gravis, drastically affects the epitope repertoire of murine CD4+ cells sensitized to nicotinic acetylcholine receptor. THE JOURNAL OF IMMUNOLOGY 1991. [DOI: 10.4049/jimmunol.147.5.1484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Susceptibility to experimental autoimmune myasthenia gravis (EAMG), which is induced in mice by injection of purified Torpedo nicotinic acetylcholine receptor (TAChR), is influenced by the I-A locus products, which restrict presentation of AChR Th epitopes. The bm12 mutation of the I-Ab molecule in the C57BL/6 strain, which is highly susceptible to EAMG, yields the EAMG resistant mutant B6.C-H-2bm12 (bm12). We investigated here the consequences of the bm 12 mutation on the CD4+ response to the TAChR alpha subunit. Upon immunization with TAChR, CD4+ cells became sensitized to TAChR and anti-AChR antibodies were produced in both bm12 and C57BL/6 strains. Overlapping synthetic peptides, corresponding to the complete sequence of TAChR alpha subunit, were used to identify Th epitopes. CD4+ cells from C57BL/6 mice recognized peptides T alpha 150-169, T alpha 181-200, and T alpha 360-378. CD4+ cells from bm12 mice did not respond to any synthetic sequence. Upon injection of the three C57BL/6 Th epitope peptides, either individually or as a pool, CD4+ cells from C57BL/6 mice recognized each peptide and TAChR. Therefore they recognized epitopes similar or identical to those originated from TAChR processing. CD4+ cells from bm12 mice injected with the same peptides responded to T alpha 360-378 strongly, to a lesser extent to T alpha 181-200, never to peptide T alpha 150-169. Only CD4+ cells sensitized against the T epitope peptide T alpha 181-200 responded to TAChR. We tested if lack of response to T alpha 150-169, and the low response to T alpha 181-200, was due to inability of the I-Abm12 molecule to present the T epitope peptides. bm12 and C57BL/6 APC were used to present the T epitope peptides to specifically sensitized CD4+ cells from C57BL/6 mice. All T epitope peptides were presented by bm12 APC, although T alpha 150-169 was presented less efficiently than by C57BL/6 APC. Resistance to EAMG induced by the bm12 mutation may be due to the change in the epitope repertoire of AChR-specific Th cells, and lack of recognition of otherwise immunodominant Th epitopes. For at least one epitope this might be due to absence of potentially reactive, specific CD4+ clones.
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The I-Abm12 mutation, which confers resistance to experimental myasthenia gravis, drastically affects the epitope repertoire of murine CD4+ cells sensitized to nicotinic acetylcholine receptor. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 1991; 147:1484-91. [PMID: 1715360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Susceptibility to experimental autoimmune myasthenia gravis (EAMG), which is induced in mice by injection of purified Torpedo nicotinic acetylcholine receptor (TAChR), is influenced by the I-A locus products, which restrict presentation of AChR Th epitopes. The bm12 mutation of the I-Ab molecule in the C57BL/6 strain, which is highly susceptible to EAMG, yields the EAMG resistant mutant B6.C-H-2bm12 (bm12). We investigated here the consequences of the bm 12 mutation on the CD4+ response to the TAChR alpha subunit. Upon immunization with TAChR, CD4+ cells became sensitized to TAChR and anti-AChR antibodies were produced in both bm12 and C57BL/6 strains. Overlapping synthetic peptides, corresponding to the complete sequence of TAChR alpha subunit, were used to identify Th epitopes. CD4+ cells from C57BL/6 mice recognized peptides T alpha 150-169, T alpha 181-200, and T alpha 360-378. CD4+ cells from bm12 mice did not respond to any synthetic sequence. Upon injection of the three C57BL/6 Th epitope peptides, either individually or as a pool, CD4+ cells from C57BL/6 mice recognized each peptide and TAChR. Therefore they recognized epitopes similar or identical to those originated from TAChR processing. CD4+ cells from bm12 mice injected with the same peptides responded to T alpha 360-378 strongly, to a lesser extent to T alpha 181-200, never to peptide T alpha 150-169. Only CD4+ cells sensitized against the T epitope peptide T alpha 181-200 responded to TAChR. We tested if lack of response to T alpha 150-169, and the low response to T alpha 181-200, was due to inability of the I-Abm12 molecule to present the T epitope peptides. bm12 and C57BL/6 APC were used to present the T epitope peptides to specifically sensitized CD4+ cells from C57BL/6 mice. All T epitope peptides were presented by bm12 APC, although T alpha 150-169 was presented less efficiently than by C57BL/6 APC. Resistance to EAMG induced by the bm12 mutation may be due to the change in the epitope repertoire of AChR-specific Th cells, and lack of recognition of otherwise immunodominant Th epitopes. For at least one epitope this might be due to absence of potentially reactive, specific CD4+ clones.
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Identification of sequence segments forming the alpha-bungarotoxin binding sites on two nicotinic acetylcholine receptor alpha subunits from the avian brain. J Biol Chem 1991; 266:15230-9. [PMID: 1869552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The relationship between neuronal alpha-bungarotoxin binding proteins (alpha BGTBPs) and nicotinic acetylcholine receptor function in the brain of higher vertebrates has remained controversial for over a decade. Recently, the cDNAs for two homologous putative ligand binding subunits, designated alpha BGTBP alpha 1 and alpha BGTBP alpha 2, have been isolated on the basis of their homology to the N terminus of an alpha BGTBP purified from chick brain. In the present study, a panel of overlapping synthetic peptides corresponding to the complete chick brain alpha BGTBP alpha 1 subunit and residues 166-215 of the alpha BGTBP alpha 2 subunits were tested for their ability to bind 125I-alpha BGT. The sequence segments corresponding to alpha BGTBP alpha 1-(181-200) and alpha BGTBP alpha 2-(181-200) were found to consistently and specifically bind 125I-alpha BGT. The ability of these peptides to bind alpha BGT was significantly decreased by reduction and alkylation of the Cys residues at positions 190/191, whereas oxidation had little effect on alpha BGT binding activity. The relative affinities for alpha BGT of the peptide sequences alpha BGTBP alpha 1-(181-200) and alpha BGTBP alpha 2-(181-200) were compared with those of peptides corresponding to the sequence segments Torpedo alpha 1-(181-200) and chick muscle alpha 1-(179-198). In competition assays, the IC50 for alpha BGTBP alpha 1-(181-200) was 20-fold higher than that obtained for the other peptides (approximately 2 versus 40 microM). These results indicate that alpha BGTBP alpha 1 and alpha BGTBP alpha 2 are ligand binding subunits able to bind alpha BGT at sites homologous with nAChR alpha subunits and that these subunits may confer differential ligand binding properties on the two alpha BGTBP subtypes of which they are components.
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Structural determinants of alpha-bungarotoxin binding to the sequence segment 181-200 of the muscle nicotinic acetylcholine receptor alpha subunit: effects of cysteine/cystine modification and species-specific amino acid substitutions. Biochemistry 1991; 30:4925-34. [PMID: 2036361 DOI: 10.1021/bi00234a013] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The sequence segment 181-200 of the Torpedo nicotinic acetylcholine receptor (nAChR) alpha subunit forms a binding site for alpha-bungarotoxin (alpha-BTX) [e.g., see Conti-Tronconi, B. M., Tang, F., Diethelm, B. M., Spencer, S. R., Reinhardt-Maelicke, S., & Maelicke, A. (1990) Biochemistry 29, 6221-6230]. Synthetic peptides corresponding to the homologous sequences of human, calf, mouse, chicken, frog, and cobra muscle nAChR alpha 1 subunits were tested for their ability to bind 125I-alpha-BTX, and differences in alpha-BTX affinity were determined by using solution (IC50S) and solid-phase (KdS) assays. Panels of overlapping peptides corresponding to the complete alpha 1 subunit of mouse and human were also tested for alpha-BTX binding, but other sequence segments forming the alpha-BTX site were not consistently detectable. The Torpedo alpha 1(181-200) and the homologous frog and chicken peptides bound alpha-BTX with higher affinity (KdS approximately 1-2 microM, IC50s approximately 1-2 microM) than the human and calf peptides (Kds approximately 3-5 microM, IC50s approximately 15 microM). The mouse peptide bound alpha-BTX weakly when attached to a solid support (Kd approximately 8 microM) but was effective in competing for 125I-alpha-BTX in solution (IC50 approximately 1 microM). The cobra nAChR alpha 1-subunit peptide did not detectably bind alpha-BTX in either assay. Amino acid substitutions were correlated with alpha-BTX binding activity peptides from different species. The role of a putative vicinal disulfide bound between Cys-192 and -193, relative to the Torpedo sequence, was determined by modifying the peptides with sulfhydryl reagents. Reduction and alkylation of the peptides decreased alpha-BTX binding, whereas oxidation of the peptides had little effect. Modifications of the cysteine/cystine residues of the cobra peptide failed to induce alpha-BTX binding activity. These results indicate that while the adjacent cysteines are likely to be involved in forming the toxin/alpha 1-subunit interface a vicinal disulfide bound was not required for alpha-BTX binding.
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Far-infrared transmittance and reflectance studies of oriented YBa2Cu3O7- delta thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:10383-10389. [PMID: 9996759 DOI: 10.1103/physrevb.43.10383] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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71
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Amino acid residues forming the interface of a neuronal nicotinic acetylcholine receptor with kappa-bungarotoxin: a study using single residue substituted peptide analogs. Biochem Biophys Res Commun 1991; 176:11-7. [PMID: 2018515 DOI: 10.1016/0006-291x(91)90882-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
kappa-Bungarotoxin is a high affinity antagonist of neuronal nicotinic acetylcholine receptors of the alpha 3 subtype. Three sequence segments of the alpha 3 subunit that contribute to forming the binding site for kappa-bungarotoxin were previously located using synthetic peptides corresponding to the complete alpha 3 subunit, i.e., alpha 3(1-18), alpha 3(50-71) and alpha 3(180-201). Here we use single residue substituted peptide analogs of the alpha 3(50-71) sequence, in which amino acids are sequentially replaced by Gly, to determine which residues are important for kappa-bungarotoxin binding activity. Although no single substitution obliterated kappa-bungarotoxin binding, several amino acid substitutions lowered the affinity for kappa-bungarotoxin--i.e., two negatively charged residues (Glu51 and Asp62), and several aliphatic and aromatic residues (Leu54, Leu56, and Tyr63). These results indicate that the interface of the alpha 3 subunit with kappa-bungarotoxin involves primarily hydrophobic interactions, and a few negatively charged residues.
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Myasthenia gravis. T epitopes on the delta subunit of human muscle acetylcholine receptor. THE JOURNAL OF IMMUNOLOGY 1991. [DOI: 10.4049/jimmunol.146.7.2253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Autoimmune T cell lines specific for muscle nicotinic acetylcholine receptor (AChR) were propagated from the blood of three myasthenia gravis patients by the use of a pool of synthetic peptides (delta-pool) corresponding to the complete sequence of the delta-subunit of human muscle AChR. Propagation of AChR-specific T cell lines was attempted unsuccessfully from four other myasthenia gravis patients and from four healthy controls. The lines had CD3+, CD4+, CD8- phenotype, strongly recognized the delta-pool, and cross-reacted vigorously with non-denatured AChR purified from mammalian muscle. They did not cross-react detectably with pools of similar overlapping synthetic peptides corresponding to the complete sequences of the alpha- and gamma-subunits of human muscle AChR. The sequence segments of the delta-subunit that contain T epitopes were identified by investigating the response of the three CD4+ T cell lines to the individual synthetic peptides forming the delta-pool. Each line had an individual pattern of peptide recognition. Although no immunodominant region, recognized in association with different DR haplotypes, could be identified, the sequence segments most strongly recognized by the CD4+ T cell lines were clustered within residues 121-290. One of the peptides more strongly recognized by the T cells corresponded to a sequence segment with high predicted propensity to form an amphipathic alpha-helix, a structural motif proposed to be typical of T epitopes.
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Myasthenia gravis. T epitopes on the delta subunit of human muscle acetylcholine receptor. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 1991; 146:2253-61. [PMID: 1706391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Autoimmune T cell lines specific for muscle nicotinic acetylcholine receptor (AChR) were propagated from the blood of three myasthenia gravis patients by the use of a pool of synthetic peptides (delta-pool) corresponding to the complete sequence of the delta-subunit of human muscle AChR. Propagation of AChR-specific T cell lines was attempted unsuccessfully from four other myasthenia gravis patients and from four healthy controls. The lines had CD3+, CD4+, CD8- phenotype, strongly recognized the delta-pool, and cross-reacted vigorously with non-denatured AChR purified from mammalian muscle. They did not cross-react detectably with pools of similar overlapping synthetic peptides corresponding to the complete sequences of the alpha- and gamma-subunits of human muscle AChR. The sequence segments of the delta-subunit that contain T epitopes were identified by investigating the response of the three CD4+ T cell lines to the individual synthetic peptides forming the delta-pool. Each line had an individual pattern of peptide recognition. Although no immunodominant region, recognized in association with different DR haplotypes, could be identified, the sequence segments most strongly recognized by the CD4+ T cell lines were clustered within residues 121-290. One of the peptides more strongly recognized by the T cells corresponded to a sequence segment with high predicted propensity to form an amphipathic alpha-helix, a structural motif proposed to be typical of T epitopes.
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Alpha-bungarotoxin and the competing antibody WF6 interact with different amino acids within the same cholinergic subsite. Biochemistry 1991; 30:2575-84. [PMID: 2001347 DOI: 10.1021/bi00224a003] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In the nicotinic acetylcholine receptors (AChRs), the sequence segment surrounding two invariant vicinal cysteinyl residues at positions 192 and 193 of the alpha subunit contains important structural component(s) of the binding site for acetylcholine and high molecular weight cholinergic antagonists, like snake alpha-neurotoxins. At least a second sequence region contributes to the formation of the cholinergic site. Studying the binding of alpha-bungarotoxin and three different monoclonal antibodies, able to compete with alpha-neurotoxins and cholinergic ligands, to a panel of synthetic peptides as representative structural elements of the AChR from Torpedo, we recently identified the sequence segments alpha 181-200 and alpha 55-74 as contributing to form the cholinergic site (Conti-Tronconi et al., 1990). As a first attempt to elucidate the structural requirements for ligand binding to the subsite formed by the sequence alpha 181-200, we have now studied the binding of alpha-bungarotoxin and of antibody WF6 to the synthetic peptide alpha 181-200, and to a panel of peptide analogues differing from the parental sequence alpha 181-200 by substitution of a single amino acid residue. CD spectral analysis of the synthetic peptide analogues indicated that they all have comparable structures in solution, and they can therefore be used to analyze the influence of single amino acid residues on ligand binding. Distinct clusters of amino acid residues, discontinuously positioned along the sequence 181-200, seem to serve as attachment points for the two ligands studied, and the residues necessary for binding of alpha-bungarotoxin are different from those crucial for binding of antibody WF6. In particular, residues at positions 188-190 (VYY) and 192-194 (CCP) were necessary for binding of alpha-bungarotoxin, while residues W187, T191, and Y198 and the three residues at positions 193-195 (CPD) were necessary for binding of WF6. Comparison of the CD spectra of the toxin/peptide complexes, and those obtained for the same peptides and alpha-bungarotoxin in solution, indicates that structural changes of the ligand(s) occur upon binding, with a net increase of the beta-structure component. The cholinergic binding site is therefore a complex surface area, formed by discontinuous clusters of amino acid residues from different sequence regions. Such complex structural arrangement is similar to the "discontinuous epitopes" observed by X-ray diffraction studies of antibody/antigen complexes [reviewed in Davies et al. (1988)]. Within this relatively large structure, cholinergic ligands bind with multiple points of attachment, and ligand-specific patterns of the attachment points exist.(ABSTRACT TRUNCATED AT 400 WORDS)
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75
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Regulation of insulin-like growth factor I messenger ribonucleic acid levels by serum in cultured rat fibroblasts. Endocrinology 1990; 127:2854-61. [PMID: 1701130 DOI: 10.1210/endo-127-6-2854] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Fibroblasts represent one of the in vivo sites of extrahepatic insulin-like growth factor I (IGF-I) production. In this study, cultured fibroblasts prepared from the skin of neonatal rats were used as a model to assess the role of serum in regulating IGF-I messenger RNA (mRNA) levels. IGF-I mRNA, as demonstrated by Northern blot analysis, was present in the cultured fibroblasts, and serum free media which was conditioned by fibroblasts for 20 h contained 108 pg/ml of immunoreactive IGF-I. Fetal calf serum (FCS) decreased steady state IGF-I mRNA levels, as measured by solution hybridization/RNase protection assay, in fibroblasts in a time- and dose-dependent fashion. Incubation of fibroblasts for 18 h in the presence of 0.3%, 0.6%, or 1% FCS decreased IGF-I mRNA levels to 76%, 56%, and 46% of the levels present in control cells which were maintained in serum free media with 0.25% BSA. Maximal inhibition to approximately 20% of control levels was seen with 4-10% FCS. In contrast, basic fibroblast growth factor and beta-actin mRNA levels increased 2- and 4-fold, respectively, with increasing concentrations of FCS. Treatment of the cells with 10 micrograms/ml cycloheximide resulted in partial abrogation of the inhibitory effect of FCS while protein synthesis in the cells was decreased to 6% of control levels. The addition of 2 micrograms/ml of insulin or 15-100 ng/ml of IGF-I to the fibroblasts did not reproduce the inhibitory effect of FCS. Finally, the inhibitory factor(s) present in the FCS was partially removed/inactivated by charcoal stripping or heat inactivating the serum, but delipidation of the FCS by chloroform extraction had no effect on the inhibitory effect of FCS. In summary, FCS contains a factor(s) that decreases IGF-I mRNA levels in cultured fibroblasts in a time- and dose-dependent fashion. The partial abrogation of the inhibitory effect of FCS with cycloheximide treatment suggests that this effect is at least partially dependent upon new protein synthesis. Furthermore, the studies using delipidated, heat-inactivated, and charcoal-stripped serum suggest that the inhibitory factor(s) is a peptide.
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76
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Random telegraph signals in high-temperature superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:10792-10795. [PMID: 9995351 DOI: 10.1103/physrevb.42.10792] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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77
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Surface resistance of laser-deposited YBa2Cu3O7 films. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:10020-10029. [PMID: 9995256 DOI: 10.1103/physrevb.42.10020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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78
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Interlayer coupling effect in high-Tc superconductors probed by YBa2Cu3O7-x/PrBa2Cu3O7-x superlattices. PHYSICAL REVIEW LETTERS 1990; 64:3086-3089. [PMID: 10041891 DOI: 10.1103/physrevlett.64.3086] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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79
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Identification of a brain acetylcholine receptor alpha subunit able to bind alpha-bungarotoxin. J Biol Chem 1990; 265:9816-24. [PMID: 2351675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Peptides corresponding to sequence segments homologous to an alpha-bungarotoxin (alpha-BGT) binding region on the alpha subunit of the Torpedo nicotinic cholinergic receptor (nAChR) were synthesized for each identified nAChR alpha subunit of the rat nervous system (alpha 1, which is expressed in muscle, and alpha 2, alpha 3, alpha 4, and alpha 5, which are expressed by neurons). The peptides were tested for their ability to directly bind 125I-alpha-BGT and to compete for 125I-alpha-BGT with Torpedo nAChR and with the alpha-BGT-binding component expressed by PC12, a sympathetic neuronal cell line. In addition to peptides of the muscle alpha 1 subunit, peptides corresponding to the sequence of a neuronal subunit, alpha 5, were able to bind 125I-alpha-BGT. Peptides containing the sequence segments 182-201 of the alpha 1 subunit and 180-199 of the alpha 5 subunit competed with Torpedo nAChR for 125I-alpha-BGT binding with IC50 values of 0.5 and 3.5 microM, respectively. Both of these peptides were also able to compete for 125I-alpha-BGT binding with native Torpedo nAChR and with the alpha-BGT-binding protein(s) expressed on PC12 cells. To determine if other sequence segments contribute to form the neuronal alpha-BGT-binding site, overlapping peptides corresponding to the putative extracellular domain of the alpha 5 subunit were synthesized and used both in direct binding assays and in competition experiments. Peptides corresponding to amino acids 16-35 and 180-199 of the alpha 5 subunit directly bound 125I-alpha-BGT and inhibited the binding of toxin to both Torpedo nAChR and PC12 cells. The results of these studies strongly support identification of the alpha 5 subunit as a component of a neuronal alpha-BGT-binding nAChR.
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80
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Identification of a brain acetylcholine receptor alpha subunit able to bind alpha-bungarotoxin. J Biol Chem 1990. [DOI: 10.1016/s0021-9258(19)38744-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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81
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Use of synthetic peptides to establish anti-human acetylcholine receptor CD4+ cell lines from myasthenia gravis patients. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 1990; 144:1711-20. [PMID: 1968487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Acetylcholine receptor-(AcChR) specific T cell lines were propagated from the PBL of six myasthenia gravis (MG) patients by the use of a pool of synthetic peptides (alpha-pool) corresponding to the complete sequence of the alpha-subunit of the human AcChR. All the lines had CD4+ phenotype and strongly recognized the alpha-pool. Four lines cross-reacted with native Torpedo AcChR. Five lines showed, at certain stages of their propagation, some degree of reactivity to autologous or DR-matched APC. One of the CD4+ T lines was challenged with each one of the peptides present in the alpha-pool. Several peptides, corresponding to the sequence segments 48-67, 101-120, 304-322, 320-337, and 419-437 of the human alpha-subunit were recognized, indicating that different epitopes and multiple T cell clones are involved in the recognition of the autoantigen in MG. Human AcChR-specific CD4+ T cell lines will be useful to identify the repertoire of epitopes recognized by the autoreactive Th cells in MG, to investigate the TCR genes utilized by autoreactive Th cells and to develop specific immunosuppressive treatments using anti-T cell vaccination.
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82
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Use of synthetic peptides to establish anti-human acetylcholine receptor CD4+ cell lines from myasthenia gravis patients. THE JOURNAL OF IMMUNOLOGY 1990. [DOI: 10.4049/jimmunol.144.5.1711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Acetylcholine receptor-(AcChR) specific T cell lines were propagated from the PBL of six myasthenia gravis (MG) patients by the use of a pool of synthetic peptides (alpha-pool) corresponding to the complete sequence of the alpha-subunit of the human AcChR. All the lines had CD4+ phenotype and strongly recognized the alpha-pool. Four lines cross-reacted with native Torpedo AcChR. Five lines showed, at certain stages of their propagation, some degree of reactivity to autologous or DR-matched APC. One of the CD4+ T lines was challenged with each one of the peptides present in the alpha-pool. Several peptides, corresponding to the sequence segments 48-67, 101-120, 304-322, 320-337, and 419-437 of the human alpha-subunit were recognized, indicating that different epitopes and multiple T cell clones are involved in the recognition of the autoantigen in MG. Human AcChR-specific CD4+ T cell lines will be useful to identify the repertoire of epitopes recognized by the autoreactive Th cells in MG, to investigate the TCR genes utilized by autoreactive Th cells and to develop specific immunosuppressive treatments using anti-T cell vaccination.
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83
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Flux creep and the nature of a flux bundle in high-Tc thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:4834-4837. [PMID: 9994332 DOI: 10.1103/physrevb.41.4834] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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84
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Direct Observation of Structural Defects in Laser-Deposited Superconducting Y-Ba-Cu-O Thin Films. Science 1990; 247:57-9. [PMID: 17749491 DOI: 10.1126/science.247.4938.57] [Citation(s) in RCA: 65] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The defect structure of in situ pulsed, laser-deposited, thin films of the high-transition temperature superconductor Y-Ba-Cu-O has been observed directly by atomic resolution electron microscopy. In a thin film with the nominal composition YBa(2)Cu(3)O(7) (123), stacking defects corresponding to the cationic stoichiometry of the 248, 247, and 224 compounds have been observed. Other defects observed include edge dislocations and antiphase boundaries. These defects, which are related to the nonequilibrium processing conditions, are likely to be responsible for the higher critical currents observed in these films as compared to single crystals.
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85
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In a clean high-Tc superconductor you do not see the gap. PHYSICAL REVIEW LETTERS 1990; 64:84-87. [PMID: 10041279 DOI: 10.1103/physrevlett.64.84] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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86
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Millimeter-wave surface impedance of YBa2Cu3O7 thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:7350-7353. [PMID: 9991142 DOI: 10.1103/physrevb.40.7350] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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87
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Gregory et al. reply:. PHYSICAL REVIEW LETTERS 1989; 63:695. [PMID: 10041152 DOI: 10.1103/physrevlett.63.695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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88
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Evidence for a vortex-glass state from mechanical measurements of flux-line-induced energy dissipation in YBa2Cu3O7-x thin films. PHYSICAL REVIEW LETTERS 1989; 62:1548-1551. [PMID: 10039702 DOI: 10.1103/physrevlett.62.1548] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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89
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Electronic structure of high-Tc Ba0.6K0.4BiO3 by x-ray photoelectron spectroscopy. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:4752-4755. [PMID: 9948848 DOI: 10.1103/physrevb.39.4752] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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90
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Systematic effects in the measurement of far-infrared linear polarization. APPLIED OPTICS 1989; 28:1000-1006. [PMID: 20548602 DOI: 10.1364/ao.28.001000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We present an analysis of systematic errors in an apparatus for measuring linear polarization in far-infrared observations of astrophysical objects. In particular, we examine a systematic effect which has until now limited the accuracy of measurement of spatially extended sources. We describe modifications to the apparatus which have reduced the effect to almost negligible levels.
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91
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[Comparison of actions of m-nifedipine and nifedipine on isolated guinea pig atria and rabbit aortic strips]. ZHONGGUO YAO LI XUE BAO = ACTA PHARMACOLOGICA SINICA 1989; 10:58-61. [PMID: 2816403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
m-Nifedipine (m-Nif) had weaker inhibitory effects than nifedipine (Nif) on the staircase phenomenon, functional refractory period and contraction (IC50: m-Nif/Nif = 18) of isolated guinea pig left atria at concentrations of 0.1-1.0 mumol/L. At the same concentrations, both m-Nif and Nif could hardly change the post-rest potentiation, excitability and ectopic automaticity induced by epinephrine. m-Nif 0.05 mumol/L, had no effect on the automatic contractile force of isolated right atria but could slow down the automatic rhythm. On the contrary, Nif had little effect on the automatic rhythm but potently inhibited the contractile force. Furthermore, in isolated rabbit aorta strips, m-Nif had an equal or somewhat stronger inhibitory effect on the tension induced by KCl. These results suggest that m-Nif might be superior to Nif in treating myocardial ischemia, arterial hypertension and congestive heart failure.
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92
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Crystalline perfection of as-deposited high-Tc superconducting thin-film surfaces: Ion channeling and x-ray photoelectron spectroscopy study. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:9307-9310. [PMID: 9945741 DOI: 10.1103/physrevb.38.9307] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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93
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Current transport in high-Tc polycrystalline films of Y-Ba-Cu-O. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 36:7210-7213. [PMID: 9942467 DOI: 10.1103/physrevb.36.7210] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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94
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[Modified radical mastectomy with preservation of the anterior thoracic nerve]. ZHONGHUA WAI KE ZA ZHI [CHINESE JOURNAL OF SURGERY] 1987; 25:576-7, 612-3. [PMID: 3449337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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95
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Evidence for the thermal nature of laser-induced polymer ablation. PHYSICAL REVIEW LETTERS 1987; 58:2142-2145. [PMID: 10034659 DOI: 10.1103/physrevlett.58.2142] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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96
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[Application of trichosanthin in 179 difficult cases of artificial abortion]. SHENG ZHI YU BI YUN = REPRODUCTION AND CONTRACEPTION 1985; 5:10-4. [PMID: 12267328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
This article introduces the application of compound crystal trichosanthin to 179 difficult cases of artificial abortion including cases with extreme anteversion and anteflexion of uterus with a fine and long cervix, cases with uterine deformations, cases within 1 year after cesarotomy, and cases of recently induced abortion. Past experiences have indicated that there have been considerable difficulties in inducing abortion in such cases as the above, and that accidents have been liable to occur. The authors have recently employed compound crystal trichosanthin, composed of crystal trichosanthin, testosterone propionate and reserpine, and succeeded in bringing about drug expansion of uterus and abortion, and safe abortion at that. The success roles were as follows: 97.96% for the group with extreme anteversion and anteflexion of uterus with a fine and long cervix, 100% for the one with uterine deformations, 95.08% for the one with past cesarotomy and 96.72% for the one with recently induced abortion.
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97
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[Omentum regeneration after resection: an experimental observation on rabbits]. ZHONGHUA WAI KE ZA ZHI [CHINESE JOURNAL OF SURGERY] 1983; 21:662-3. [PMID: 6676011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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