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Alster J, Bína D, Charvátová K, Lokstein H, Pšenčík J. Direct observation of triplet energy transfer between chlorophylls and carotenoids in the core antenna of photosystem I from Thermosynechococcus elongatus. Biochim Biophys Acta Bioenerg 2024; 1865:149016. [PMID: 37832862 DOI: 10.1016/j.bbabio.2023.149016] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/29/2023] [Accepted: 10/04/2023] [Indexed: 10/15/2023]
Abstract
Quenching of chlorophyll triplet states by carotenoids is an essential photoprotective process, which prevents formation of reactive singlet oxygen in photosynthetic light-harvesting complexes. The process is usually very efficient in oxygenic organisms under physiological conditions, thus preventing any observable accumulation of chlorophyll triplets. However, it subsequently prevents also the determination of the triplet transfer rate. Here we report results of nanosecond transient absorption spectroscopy on photosystem I core complexes, where a major part of chlorophyll a triplet states (~60 %) accumulates on a nanosecond time scale at ambient temperature. As a consequence, the triplet energy transfer could be resolved and the transfer time was determined to be about 24 ns. A smaller fraction of chlorophyll a triplet states (~40 %) is quenched with a faster rate, which could not be determined. Our analysis indicates that these chlorophylls are in direct contact with carotenoids. The overall chlorophyll triplet yield in the core antenna was estimated to be ~0.3 %, which is a value two orders of magnitude smaller than in most other photosynthetic light-harvesting complexes. This explains why slower quenching of chlorophyll triplet states is sufficient for photoprotection of photosystem I. Nevertheless, the core antenna of photosystem I represents one of only few photosynthetic complexes of oxygenic organisms in which the quenching rate of the majority of chlorophyll triplets can be directly monitored under physiological temperature.
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Affiliation(s)
- J Alster
- Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | - D Bína
- Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic; Biology Centre, Czech Academy of Science, České Budějovice, Czech Republic
| | - K Charvátová
- Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | - H Lokstein
- Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | - J Pšenčík
- Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic.
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Yoo S, Alster J, Zigmantas D. Freestanding sample holder for ultrafast optical spectroscopy at low temperatures. Rev Sci Instrum 2014; 85:043103. [PMID: 24784589 DOI: 10.1063/1.4870277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Ultrafast optical spectroscopy techniques are often employed to gain information about samples that are liquid at room temperature and frozen at cryogenic temperatures. However, the measurements suffer from the presence of unwanted, non-resonant signals originating in the sample cell walls. Most of these artifacts can be avoided in the measurements performed at room temperature by using liquid jet systems, i.e., by removing the sample cell. However, these systems cannot be used in low temperature measurements, when the sample is frozen. Herein we describe a freestanding sample holder that allows low temperature ultrafast spectroscopy measurements free of artifacts caused by the sample cell.
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Affiliation(s)
- S Yoo
- Department of Chemical Physics, Lund University, P.O. Box 124, 22100 Lund, Sweden
| | - J Alster
- Department of Chemical Physics, Lund University, P.O. Box 124, 22100 Lund, Sweden
| | - D Zigmantas
- Department of Chemical Physics, Lund University, P.O. Box 124, 22100 Lund, Sweden
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Alster J, Kabeláč M, Tuma R, Pšenčík J, Burda J. Computational study of short-range interactions in bacteriochlorophyll aggregates. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.07.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Alster J, Polívka T, Arellano JB, Hříbek P, Vácha F, Hála J, Pšenčík J. Self-assembly and energy transfer in artificial light-harvesting complexes of bacteriochlorophyll c with astaxanthin. Photosynth Res 2012; 111:193-204. [PMID: 21833799 DOI: 10.1007/s11120-011-9670-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Accepted: 07/02/2011] [Indexed: 05/31/2023]
Abstract
Chlorosomes, the light-harvesting antennae of green photosynthetic bacteria, are based on large aggregates of bacteriochlorophyll molecules. Aggregates with similar properties to those in chlorosomes can also be prepared in vitro. Several agents were shown to induce aggregation of bacteriochlorophyll c in aqueous environments, including certain lipids, carotenes, and quinones. A key distinguishing feature of bacteriochlorophyll c aggregates, both in vitro and in chlorosomes, is a large (>60 nm) red shift of their Q(y) absorption band compared with that of the monomers. In this study, we investigate the self-assembly of bacteriochlorophyll c with the xanthophyll astaxanthin, which leads to the formation of a new type of complexes. Our results indicate that, due to its specific structure, astaxanthin molecules competes with bacteriochlorophylls for the bonds involved in the aggregation, thus preventing the formation of any significant red shift compared with pure bacteriochlorophyll c in aqueous buffer. A strong interaction between both the types of pigments in the developed assemblies, is manifested by a rather efficient (~40%) excitation energy transfer from astaxanthin to bacteriochlorophyll c, as revealed by fluorescence excitation spectroscopy. Results of transient absorption spectroscopy show that the energy transfer is very fast (<500 fs) and proceeds through the S(2) state of astaxanthin.
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Affiliation(s)
- J Alster
- Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16, Praha, Czech Republic
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Alster J, Polívka T, Arellano J, Chábera P, Vácha F, Pšenčík J. β-Carotene to bacteriochlorophyll c energy transfer in self-assembled aggregates mimicking chlorosomes. Chem Phys 2010. [DOI: 10.1016/j.chemphys.2010.02.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Saad I, Modlin C, Tiong HY, Alster J, Mastroinni B, Savas K, Flechner S. 2070 LIVING DONOR RENAL TRANSPLANTATION OVERCOMES RACIAL DISPARITIES IN AFRICAN AMERICAN RECIPIENTS. J Urol 2010. [DOI: 10.1016/j.juro.2010.02.2130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kelly DM, Zhu X, Shiba H, Irefin S, Trenti L, Cocieru A, Diago T, Wang LF, Quintini C, Chen Z, Alster J, Nakagawa S, Miller C, Demetris A, Fung JJ. Adenosine restores the hepatic artery buffer response and improves survival in a porcine model of small-for-size syndrome. Liver Transpl 2009; 15:1448-57. [PMID: 19877203 DOI: 10.1002/lt.21863] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The aim of the study is to define the role of the HABR in the pathophysiology of the SFS liver graft and to demonstrate that restoration of hepatic artery flow (HAF) has a significant impact on outcome and improves survival. Nine pigs received partial liver allografts of 60% liver volume, Group 1; 8 animals received 20% LV grafts, Group 2; 9 animals received 20% LV grafts with adenosine infusion, Group 3. HAF and portal vein flow (PVF) were recorded at 10 min, 60 min and 90 min post reperfusion, on POD 3 and POD 7 in Group 1, and daily in Group 2 and 3 up to POD 14. Baseline HAF and PVF (ml/100 g/min) were 29 +/- 12 (mean +/- SD) and 74 +/- 8 respectively, with 28% of total liver blood flow (TLBF) from the HA and 72% from the PV. PVF peaked at 10 mins in all groups, increasing by a factor of 3.8 in the 20% group compared to an increase of 1.9 in the 60% group. By POD 7-14 PVF rates approached baseline values in all groups. The HABR was intact immediately following reperfusion in all groups with a reciprocal decrease in HAF corresponding to the peak PVF at 10 min. However in the 20% group HAF decreased to 12 +/- 8 ml/100 g/min at 90 min and remained low out to POD 7-14 despite restoration of normal PVF rates. Histopathology confirmed evidence of HA vasospasm and its consequences, cholestasis, centrilobular necrosis and biliary ischemia in Group 2. HA infusion of adenosine significantly improved HAF (p < .0001), reversed pathological changes and significantly improved survival (p = .05). An impaired HABR is important in the pathophysiology of the SFSS. Reversal of the vasospasm significantly improves outcome.
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Affiliation(s)
- Dympna M Kelly
- Department of Liver Transplantation and Hepatobiliary Surgery, Cleveland Clinic, Cleveland, OH 44195, USA.
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Poonyagariyagorn HK, Gershman A, Avery R, Minai O, Blazey H, Asamoto K, Alster J, Murthy S, Mehta A, Pettersson G, Mason DP, Budev M. Challenges in the diagnosis and management of Nocardia infections in lung transplant recipients. Transpl Infect Dis 2008; 10:403-8. [PMID: 18823356 DOI: 10.1111/j.1399-3062.2008.00338.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Nocardia infection occurs in 2.1-3.5% of lung transplant recipients, and may involve cavitary nodular pulmonary lesions, soft tissue infection, or other sites of dissemination. Nocardiosis can pose challenging clinical problems in the areas of diagnosis and treatment. Diagnostic delays may occur, and adverse reactions to therapy are common. This study reviews clinical and epidemiological aspects of nocardiosis in lung transplant recipients, with special attention to pitfalls in management. Clinicians should be alert for these possibilities in order to institute prompt therapy and to achieve successful outcomes. METHODS A retrospective cohort study was conducted of 577 lung transplant recipients from January 1991 to May 2007. Demographics, reason for transplant, recent rejection, time from transplantation, site of infection, hypogammaglobulinemia, and/or neutropenia shortly before onset, Pneumocystis jiroveci prophylaxis, Nocardia species, radiographic findings, extrapulmonary lesions, nature and duration of treatment, adverse reactions, and outcomes were recorded. RESULT Nocardia infection occurred in 1.9% (11/577). Mean onset was 14.3 months after transplant (range 1.5-39 months). N. asteroides was isolated in 55% (6/11). Emphysema was the most common reason for transplant (7/11, 64%). Six patients were receiving trimethoprim-sulfamethoxazole (TMP-SMX) prophylaxis at the time of diagnosis. Three patients had immune globulin G levels <400 mg/dL and 2 were neutropenic in the 3 months preceding diagnosis. Diagnosis was made by bronchoalveolar lavage (55%), skin abscess culture (18%), open lung biopsy (9%), pleural fluid (9%), and sputum culture (9%). Definitive diagnosis required a median of 9 days and a mean of 13.6 days (range 3-35 days) from the time of diagnostic sampling. Soft tissue lesions occurred in 3 and central nervous system involvement in 1 patient. Adverse reactions to therapy occurred in 9/10 (90%) of patients for whom information was available. Nocardia-related mortality occurred in 2/11 patients (18%). CONCLUSIONS Nocardiosis occurred in 1.9% of lung transplant recipients and was associated with a mean of nearly 2 weeks to diagnosis and frequent adverse effects on therapy. TMP-SMX prophylaxis on a thrice weekly basis did not prevent all episodes of nocardiosis. Despite utilization of protocol bronchoscopies with cultures for Nocardia, this organism remains a source of clinical complexity in the lung transplant population.
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Affiliation(s)
- H K Poonyagariyagorn
- Department of Internal Medicine, The Cleveland Clinic, Cleveland, Ohio 44195, USA.
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Yamani MH, Cook DJ, Rodriguez ER, Thomas DM, Gupta S, Alster J, Taylor DO, Hobbs R, Young JB, Smedira N, Starling RC. Increased Expression of Angiotensin II Type 1 Receptor (AGTR1) in Heart Transplant Recipients With Recurrent Rejection. J Heart Lung Transplant 2006; 25:1283-9. [DOI: 10.1016/j.healun.2006.09.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2006] [Revised: 08/24/2006] [Accepted: 09/09/2006] [Indexed: 11/16/2022] Open
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Chapman J, Budev M, Stevens K, Mehta A, Githaiga AN, Minai O, Haug M, Blazey H, Evans-Walker T, Cwalina M, Alster J, Stephany B, Al-Alao B, Danziger-Isakov L, Pettersson G, Mossad S, Avery R. VALGANCICLOVIR-ASSOCIATED NEUTROPENIA IN LUNG TRANSPLANT RECIPIENTS. Chest 2006. [DOI: 10.1378/chest.130.4_meetingabstracts.153s-d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Tang A, Watson JW, Aclander J, Alster J, Asryan G, Averichev Y, Barton D, Baturin V, Bukhtoyarova N, Carroll A, Gushue S, Heppelmann S, Leksanov A, Makdisi Y, Malki A, Minina E, Navon I, Nicholson H, Ogawa A, Panebratsev Y, Piasetzky E, Schetkovsky A, Shimanskiy S, Zhalov D. n-p short-range correlations from (p,2p+n) measurements. Phys Rev Lett 2003; 90:042301. [PMID: 12570411 DOI: 10.1103/physrevlett.90.042301] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2002] [Indexed: 05/24/2023]
Abstract
We studied the 12C(p,2p+n) reaction at beam momenta of 5.9, 8.0, and 9.0 GeV/c. For quasielastic (p,2p) events p(f), the momentum of the knocked-out proton before the reaction, was compared (event by event) with p(n), the coincident neutron momentum. For |p(n)|>k(F)=0.220 GeV/c (the Fermi momentum) a strong back-to-back directional correlation between p(f) and p(n) was observed, indicative of short-range n-p correlations. From p(n) and p(f) we constructed the distributions of c.m. and relative motion in the longitudinal direction for correlated pairs. We also determined that 49+/-13% of events with |p(f)|>k(F) had directionally correlated neutrons with |p(n)|>k(F).
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Affiliation(s)
- A Tang
- Department of Physics, Kent State University, Kent, Ohio 44242, USA
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Leksanov A, Alster J, Asryan G, Averichev Y, Barton D, Baturin V, Bukhtoyarova N, Carroll A, Heppelmann S, Kawabata T, Makdisi Y, Malki A, Minina E, Navon I, Nicholson H, Ogawa A, Panebratsev Y, Piasetzky E, Schetkovsky A, Shimanskiy S, Tang A, Watson JW, Yoshida H, Zhalov D. Energy dependence of nuclear transparency in C (p,2p) scattering. Phys Rev Lett 2001; 87:212301. [PMID: 11736334 DOI: 10.1103/physrevlett.87.212301] [Citation(s) in RCA: 2] [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] [Received: 04/20/2001] [Indexed: 05/23/2023]
Abstract
The transparency of carbon for (p,2p) quasielastic events was measured at beam momenta ranging from 5.9 to 14.5 GeV/c at 90 degrees c.m. The four-momentum transfer squared (Q2) ranged from 4.7 to 12.7 (GeV/c)(2). We present the observed beam momentum dependence of the ratio of the carbon to hydrogen cross sections. We also apply a model for the nuclear momentum distribution of carbon to obtain the nuclear transparency. We find a sharp rise in transparency as the beam momentum is increased to 9 GeV/c and a reduction to approximately the Glauber level at higher energies.
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Affiliation(s)
- A Leksanov
- Physics Department, Pennsylvania State University, University Park, Pennsylvania 16801, USA
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Attias J, Shemesh Z, Bleich A, Solomon Z, Bar-Or G, Alster J, Sohmer H. Psychological profile of help-seeking and non-help-seeking tinnitus patients. Scand Audiol 1995; 24:13-8. [PMID: 7761793 DOI: 10.3109/01050399509042204] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The psychological profile of tinnitus patients who sought treatment (Help-Seeking, HS) was compared with that of patients who did not seek help (non-help-seeking, NHS) and with normal control subjects. Psychological evaluations as well as hearing, tinnitus loudness, and tinnitus pitch were measured. Overall, the psychiatric symptomatology of HS (n = 50) was more severe with poorer effective coping abilities and externalization of locus of control than NHS (n - 50). However, the psychiatric symptomatology of the NHS was remarkably more severe than that in the normals (n = 73) and more like that in the HS even though they did not turn to treatment. Tinnitus loudness was significantly lower in HS than in NHS subjects. The lower the tinnitus loudness, the higher the psychiatric symptomatology. The trend towards subclinical abnormalities in NHS indicates their vulnerability to pathology and this requires the attention of the therapist in order to increase the patient's self-awareness and to suggest preventive coping strategies or relaxation techniques.
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Affiliation(s)
- J Attias
- Institute for Noise Hazards Research, Medical Corps, Chaim Sheba Medical Center, Ramat-Gan, Israel
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Andivahis L, Bosted PE, Lung A, Stuart LM, Alster J, Arnold RG, Chang CC, Dietrich FS, Dodge W, Gearhart R, Gomez J, Griffioen KA, Hicks RS, Hyde-Wright CE, Keppel C, Kuhn SE, Lichtenstadt J, Miskimen RA, Peterson GA, Petratos GG, Rock SE, Rokni S, Sakumoto WK, Spengos M, Swartz K, Szalata Z, Tao LH. Measurements of the electric and magnetic form factors of the proton from Q2=1.75 to 8.83 (GeV/c)2. Phys Rev D Part Fields 1994; 50:5491-5517. [PMID: 10018207 DOI: 10.1103/physrevd.50.5491] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [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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Walker RC, Filippone BW, Jourdan J, Milner R, McKeown R, Potterveld D, Andivahis L, Arnold R, Benton D, Bosted P, deChambrier G, Lung A, Rock SE, Szalata ZM, Para A, Dietrich F, Button-Shafer J, Debebe B, Hicks RS, Dasu S, Bodek A, Harada H, Krasny MW, Lang K, Riordan EM, Gearhart R, Whitlow LW, Alster J. Measurements of the proton elastic form factors for 1 <= Q2 <= 3 (GeV/c)2 at SLAC. Phys Rev D Part Fields 1994; 49:5671-5689. [PMID: 10016892 DOI: 10.1103/physrevd.49.5671] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Dasu S, Bodek A, Harada H, Krasny MW, Lang K, Riordan EM, Andivahis L, Arnold R, Benton D, Bosted P, deChambrier G, Lung A, Rock SE, Szalata ZM, Walker RC, Filippone BW, Jourdan J, Milner R, McKeown R, Potterveld D, Para A, Dietrich F, Button-Shafer J, Debebe B, Hicks RS, Gearhart R, Whitlow LW, Alster J. Measurement of kinematic and nuclear dependence of R= sigma L/ sigma T in deep inelastic electron scattering. Phys Rev D Part Fields 1994; 49:5641-5670. [PMID: 10016891 DOI: 10.1103/physrevd.49.5641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Weiss R, Aclander J, Alster J, Barakat M, Bart S, Chrien RE, Krauss RA, Johnston K, Mardor I, Mardor Y, Piasetzky E, Pile PH, Sawafta R, Seyfarth H, Stearns RL, Sutter RJ, Yavin AI. Measurement of low energy K+ total cross sections on N=Z nuclei. Phys Rev C Nucl Phys 1994; 49:2569-2577. [PMID: 9969505 DOI: 10.1103/physrevc.49.2569] [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: 05/22/2023]
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Larson B, Häusser O, Alster J, Bahrami M, Brash EJ, Cummings WJ, Delheij PP, Henderson R, Ottewell D, Rahav A, Ram S, Vetterli MC, Whittal DM. Asymmetries in 100 MeV pi +/ pi --3H. Phys Rev C Nucl Phys 1994; 49:2045-2053. [PMID: 9969436 DOI: 10.1103/physrevc.49.2045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Abstract
Sleep disturbance is a common and frequent complaint reported by tinnitus sufferers. Recent studies have shown that when insomnia and depression are associated with tinnitus there is decreased tolerance and increased discomfort with the tinnitus. The purpose of this study was to assess the reported prevalence and severity of sleep disturbance in chronic tinnitus patients. Patients (n = 80) were military personnel without major psychiatric disturbance and their tinnitus was associated with noise-induced permanent hearing loss (NIHL). Mini Sleep Questionnaire (MSQ) scores for sleep disturbance were found to be higher than those of normal controls in 77% of the patients. Highest MSQ scores in tinnitus patients with a sleep complaint were for delayed sleep, morning awakenings, mid-sleep awakenings, morning fatigue, and chronic fatigue. In contrast, a complaint of excessive daytime sleep (EDS) was not common. The self-rated severity of the tinnitus was greater in subjects with higher sleep disturbance scores. Self-rated depressive symptomatology was also highly correlated with sleep disturbance. Retrospective examination of sleep records and polysomnographic data for 10 patients with a complaint of chronic tinnitus revealed a combined effect for the tinnitus condition when associated with another conventional sleep disorder. In spite of the common complaint of sleep disturbance in tinnitus, only a minority seek a sleep examination.
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Affiliation(s)
- J Alster
- Sleep Research Institute, Sheba Medical Center, Israel
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Alster J, Pratt H, Feinsod M. Density spectral array, evoked potentials, and temperature rhythms in the evaluation and prognosis of the comatose patient. Brain Inj 1993; 7:191-208. [PMID: 8508176 DOI: 10.3109/02699059309029672] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Glasgow Coma Scale (GCS), density spectral array (DSA), EEG, BAEP and circadian temperature rhythm were studied in comatose patients in order to determine level of arousal and appraise the prognostic capability of these combined measures. Subjects were 29 comatose patients in the neurosurgical ICU at the Rambam Medical Center suffering from head trauma, vascular disorders or metastatic growth. Results show that best prognostic capabilities were for DSA, GCS and BAEP, in that order. As a single parameter physiological response to a sound stimulus (increase in EMG, change in EEG frequency and appearance of sharp waves or k-complex) was the single best predictor for outcome, with significant response rates for the good, deficit, vegetative and death outcomes at 83%, 57%, 37% and 18%, respectively. Rectal temperature was analysed for 24 h circadian periodicity. Daily acrophases were found to shift forward or backward on the level of about 2-7 h a day with fluctuations about a stable or unstable mean. The absence of 'free-running rhythms' associated with environmental isolation studies might reflect an ability to respond to environmental Zeitgerbers while unconscious. Temperature oscillations as well as 24 h rhythms were found even in the most severely brain-damaged patients, reflecting the resilience of the circadian oscillators in the brain to trauma.
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Affiliation(s)
- J Alster
- Department of Neurosurgery, Rambam Medical Center, Haifa, Israel
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Frodyma M, Arnold RG, Benton D, Bosted PE, Clogher L, Dechambrier G, Katramatou AT, Lambert J, Lung A, Petratos GG, Rahbar A, Rock SE, Szalata ZM, Debebe B, Hicks RS, Hotta A, Peterson GA, Gearhart RA, Alster J, Lichtenstadt J, Dietrich F. Measurements of transverse electron scattering from the deuteron in the threshold region at high momentum transfers. Phys Rev C Nucl Phys 1993; 47:1599-1614. [PMID: 9968608 DOI: 10.1103/physrevc.47.1599] [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: 05/22/2023]
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Lung A, Stuart LM, Bosted PE, Andivahis L, Alster J, Arnold RG, Chang CC, Dietrich FS, Dodge WR, Gearhart R, Gomez J, Griffioen KA, Hicks RS, Hyde-Wright CE, Keppel C, Kuhn SE, Lichtenstadt J, Miskimen RA, Peterson GA, Petratos GG, Rock SE, Rokni SH, Sakumoto WK, Spengos M, Swartz K, Szalata Z, Tao LH. Measurements of the electric and magnetic form factors of the neutron from Q2=1.75 to 4.00 (GeV/c)2. Phys Rev Lett 1993; 70:718-721. [PMID: 10054186 DOI: 10.1103/physrevlett.70.718] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [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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Bosted PE, Lung A, Andivahis L, Stuart LM, Alster J, Arnold RG, Chang CC, Dietrich FS, Dodge W, Gearhart R, Gomez J, Griffioen KA, Hicks RS, Hyde-Wright CE, Keppel C, Kuhn SE, Lichtenstadt J, Miskimen RA, Peterson GA, Petratos GG, Rock SE, Rokni S, Sakumoto WK, Spengos M, Swartz K, Szalata Z, Tao LH. Measurements of nu W2 and R= sigma L/ sigma T from inelastic electron-aluminum scattering near x=1. Phys Rev C Nucl Phys 1992; 46:2505-2515. [PMID: 9968381 DOI: 10.1103/physrevc.46.2505] [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: 05/22/2023]
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Krauss RA, Alster J, Ashery D, Bart S, Chrien RE, Hiebert JC, Johnson RR, Kishimoto T, Mardor I, Mardor Y, Moinester MA, Olshevsky R, Piasetzky E, Pile PH, Sawafta R, Stearns RL, Sutter RJ, Weiss R, Yavin AI. K+ total cross sections on 12C and medium effects in nuclei. Phys Rev C Nucl Phys 1992; 46:655-666. [PMID: 9968162 DOI: 10.1103/physrevc.46.655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Mardor I, Mardor Y, Piasetsky E, Alster J, Sargsyan MM. Effect of multiple scattering on the measurement of nuclear transparency. Phys Rev C Nucl Phys 1992; 46:761-767. [PMID: 9968174 DOI: 10.1103/physrevc.46.761] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Bosted PE, Andivahis L, Lung A, Stuart LM, Alster J, Arnold RG, Chang CC, Dietrich FS, Dodge W, Gearhart R, Gomez J, Griffioen KA, Hicks RS, Hyde-Wright CE, Keppel C, Kuhn SE, Lichtenstadt J, Miskimen RA, Peterson GA, Petratos GG, Rock SE, Rokni S, Sakumoto WK, Spengos M, Swartz K, Szalata Z, Tao LH. Measurements of the electric and magnetic form factors of the proton from Q2=1.75 to 8.83 (GeV/c)2. Phys Rev Lett 1992; 68:3841-3844. [PMID: 10045818 DOI: 10.1103/physrevlett.68.3841] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [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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Rahav A, Alster J, Ashery D, Lichtenstadt J, Navon I, Piasetzky E, Amaudruz P, Botje M, Burger W, Ingram CH, Schumacher RA, Sennhauser U, Wood SA. Measurement of the 12C( pi,2 pi ) reactions and possible evidence of a double- Delta excitation. Phys Rev Lett 1991; 66:1279-1282. [PMID: 10043165 DOI: 10.1103/physrevlett.66.1279] [Citation(s) in RCA: 3] [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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Mardor Y, Piasetsky E, Alster J, Ashery D, Moinester MA, Yavin AI, Bart S, Chrien RE, Pile PH, Sutter RJ, Krauss RA, Hiebert JC, Stearns RL, Kishimoto T, Johnson RR, Olshevsky R. K+ total cross sections as a test for nucleon "swelling". Phys Rev Lett 1990; 65:2110-2113. [PMID: 10042456 DOI: 10.1103/physrevlett.65.2110] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [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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Arnold RG, Benton D, Bosted PE, Clogher L, deChambrier G, Katramatou AT, Lambert J, Lung A, Petratos GG, Rahbar A, Rock SE, Szalata ZM, Debebe B, Frodyma MB, Hicks RS, Hotta A, Peterson GA, Gearhart RA, Alster J, Lichtenstadt J, Dietrich F. Transverse electrodisintegration of the deuteron in the threshold region at high Q2. Phys Rev C Nucl Phys 1990; 42:1-5. [PMID: 9966683 DOI: 10.1103/physrevc.42.r1] [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: 05/22/2023]
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Bosted PE, Katramatou AT, Arnold RG, Benton D, Clogher L, DeChambrier G, Lambert J, Lung A, Petratos GG, Rahbar A, Rock SE, Szalata ZM, Debebe B, Frodyma M, Hicks RS, Hotta A, Peterson GA, Gearhart RA, Alster J, Lichtenstadt J, Dietrich F. Measurements of the deuteron and proton magnetic form factors at large momentum transfers. Phys Rev C Nucl Phys 1990; 42:38-64. [PMID: 9966689 DOI: 10.1103/physrevc.42.38] [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: 05/22/2023]
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Abstract
C8H12N2+.2CN3O6-, Mr = 436.27, monoclinic, C2/m, a = 14.298 (2), b = 8.408 (1), c = 7.354 (2) A, beta = 103.42 (2) degrees, V = 859.9 (5) A3, Z = 2, Dx = 1.68 g cm-3, lambda(Mo K alpha) = 0.71069 A (graphite monochromator), mu = 1.66 cm-1, F(000) = 448, T = 293 K, final R = 0.039 for 672 reflections with I greater than or equal to 3 sigma(I). The cubanediyldiammonium cation and trinitromethanide anion have 2/m and m crystallographic symmetries, respectively. The cation is linked to six trinitromethanide anions, three at each end, by a total of 12 N--H...O hydrogen bonds through the six cation H atoms. The cubane cage has a local threefold axis of symmetry along the long axis (N1...N1) of the cation and undergoes a large librational motion, 17 degrees r.m.s. amplitude, about this axis.
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Affiliation(s)
- H L Ammon
- Department of Chemistry and Biochemistry, University of Maryland, College Park 20742
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Loveman RA, Clausen BL, Peterson RJ, Rokni SH, Baer HW, Bergmann AG, Bowman JD, Irom F, Seftor CJ, Alster J, Piasetzky E, Knudson JN, Sennhauser U. Pion charge exchange to the isovector giant dipole state at energies above the 3-3 resonance. Phys Rev C Nucl Phys 1989; 40:2710-2716. [PMID: 9966281 DOI: 10.1103/physrevc.40.2710] [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: 05/22/2023]
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Plum MA, Lindgren RA, Dubach J, Hicks RS, Huffman RL, Parker B, Peterson GA, Alster J, Lichtenstadt J, Moinester MA, Baer H. 180 degrees electron scattering from 14C. Phys Rev C Nucl Phys 1989; 40:1861-1876. [PMID: 9966183 DOI: 10.1103/physrevc.40.1861] [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: 05/22/2023]
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Dasu S, Bodek A, Harada H, Krasny MW, Lang K, Riordan EM, Arnold R, Benton D, Bosted P, Clogher L, deChambrier G, Lung A, Rock SE, Szalata ZM, Walker RC, Filippone BW, Jourdan J, Milner R, McKeown R, Potterveld D, Para A, Dietrich F, Button-Shafer J, Debebe B, Hicks RS, Gearhart R, Whitlow LW, Alster J. Precision measurement of R= sigma L/ sigma T and F2 in deep-inelastic electron scattering. Phys Rev Lett 1988; 61:1061-1064. [PMID: 10039509 DOI: 10.1103/physrevlett.61.1061] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [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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Arnold RG, Benton D, Bosted P, Clogher L, DeChambrier G, Katramatou AT, Lambert J, Lung A, Petratos GG, Rahbar A, Rock SE, Szalata ZM, Debebe B, Frodyma M, Hicks RS, Hotta A, Peterson GA, Gearhart RA, Alster J, Lichtenstadt J, Dietrich F. Measurements of transverse quasielastic electron scattering from the deuteron at high momentum transfers. Phys Rev Lett 1988; 61:806-809. [PMID: 10039435 DOI: 10.1103/physrevlett.61.806] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [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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Dasu S, Bodek A, Harada H, Krasny MW, Lang K, Riordan EM, Arnold R, Benton D, Bosted P, Clogher L, deChambrier G, Lung A, Rock SE, Szalata ZM, Walker RC, Filippone BW, Jourdan J, Milner R, McKeown R, Potterveld D, Para A, Dietrich F, Button-Shafer J, Debebe B, Hicks RS, Gearhart R, Whitlow LW, Alster J. Measurement of the difference in R= sigma L/ sigma T and of sigma A/ sigma D in deep-inelastic e-D, e-Fe, and e-Au scattering. Phys Rev Lett 1988; 60:2591-2594. [PMID: 10038398 DOI: 10.1103/physrevlett.60.2591] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [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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Arnold RG, Benton D, Bosted P, Clogher L, DeChambrier G, Katramatou AT, Lambert J, Lung A, Petratos GG, Rahbar A, Rock SE, Szalata ZM, Gearhart RA, Debebe B, Frodyma M, Hicks RS, Hotta A, Peterson GA, Alster J, Lichtenstadt J, Dietrich F. Measurements of deuteron magnetic form factor high momentum transfer. Phys Rev Lett 1987; 58:1723-1726. [PMID: 10034518 DOI: 10.1103/physrevlett.58.1723] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [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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Irom F, Bowman JD, Bolme GO, Piasetzky E, Sennhauser U, Alster J, Lichtenstadt J, Moinester M, Knudson JN, Rokni SH, Siciliano ER. Excitation of isovector giant resonances in pion single-charge exchange at 120, 165, and 230 MeV. Phys Rev C Nucl Phys 1986; 34:2231-2239. [PMID: 9953702 DOI: 10.1103/physrevc.34.2231] [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: 05/22/2023]
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Erell A, Alster J, Lichtenstadt J, Moinester MA, Bowman JD, Cooper MD, Irom F, Matis HS, Piasetzky E, Sennhauser U. Measurements on isovector giant resonances in pion charge exchange. Phys Rev C Nucl Phys 1986; 34:1822-1844. [PMID: 9953648 DOI: 10.1103/physrevc.34.1822] [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: 05/22/2023]
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Aniol KA, Altman A, Johnson RR, Roser HW, Tacik R, Wienands U, Ashery D, Alster J, Moinester MA, Piasetzky E, Gill DR, Vincent J. Pion absorption on 3He at T pi =62.5 and 82.8 MeV. Phys Rev C Nucl Phys 1986; 33:1714-1726. [PMID: 9953335 DOI: 10.1103/physrevc.33.1714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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