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de Oliveira BR, Queiroz Duarte MA, Zuffo AM, Steiner F, González Aguilera J, Filgueiras Dutra A, de Alcântara Neto F, Renan Lima Leite M, Guedes da Silva NS, Pumacallahui Salcedo E, Morales-Aranibar L, Mollinedo Chura RM, Ccama Alejo R, Caviedes Contreras W. Selection of forage grasses for cultivation under water-limited conditions using Manhattan distance and TOPSIS. PLoS One 2024; 19:e0292076. [PMID: 38166042 PMCID: PMC10760912 DOI: 10.1371/journal.pone.0292076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 09/12/2023] [Indexed: 01/04/2024] Open
Abstract
Extreme weather events, such as severe droughts, pose a threat to the sustainability of beef cattle by limiting the growth and development of forage plants and reducing the available pasture for animals. Thus, the search for forage species that are more tolerant and adapted to soil water deficit conditions is an important strategy to improve food supply. In this study, we propose utilizing the mathematical concept of the Manhattan distance to assess the variations in the morphological variables of tropical forage grasses under water-limited conditions. This study aimed to select genotypes of tropical forage grasses under different water stress levels (moderate or severe) at this distance and the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). Nine varieties from five species were examined. Forage grasses were grown in 12-L pots under three soil irrigation regimes [100% pot capacity-PC (well-irrigated control), 60% PC (moderate drought stress), and 25% PC (severe drought stress)] with four replicates. Drought stress treatments were applied for 25 days during the forage grass tillering and stalk elongation phases. After exposure to drought stress, the growth and morphological traits of forage plants were evaluated. The results show that the use of the Manhattan distance combined with TOPSIS helps in the genotypic selection of more stable tropical forage grass varieties when comparing plants exposed to moderate and severe drought conditions in relation to the nonstressful environment (control). The 'ADR 300', 'Pojuca', 'Marandu', and 'Xaraés' varieties show greater stability when grown in a greenhouse and subjected to water stress environments. The selected forage varieties can be used as parents in plant breeding programs, allowing us to obtain new drought-resistant genotypes.
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Affiliation(s)
| | - Marco Aparecido Queiroz Duarte
- Departamento de Matemática, Universidade Estadual de Mato Grosso do Sul (UEMS), Unidade de Cassilândia, Cassilândia-MS, Brasil
| | - Alan Mario Zuffo
- Departamento de Agronomia, Universidade Estadual do Maranhão (UEMA), Campus Balsas, Balsas-MA, Brasil
| | - Fábio Steiner
- Departamento de Agronomia, Universidade Estadual de Mato Grosso do Sul (UEMS), Unidade de Cassilândia, Cassilândia-MS, Brasil
| | - Jorge González Aguilera
- Pantanal Editora, Nova Xavantina-MT, Brasil
- Departamento de Agronomia, Universidade Estadual de Mato Grosso do Sul (UEMS), Unidade de Cassilândia, Cassilândia-MS, Brasil
| | | | | | - Marcos Renan Lima Leite
- Programa de Pós-Graduação em Agronomia, Universidade Federal do Piauí Teresina, Piauí, Brasil
| | | | - Eliseo Pumacallahui Salcedo
- Departamento de Ingeniería Civil y Ciencias Básicas, Universidad Nacional Intercultural de Quillabamba (UNIQ), Cusco, Perú
| | - Luis Morales-Aranibar
- Departamento de Ingeniería Civil y Ciencias Básicas, Universidad Nacional Intercultural de Quillabamba (UNIQ), Cusco, Perú
| | | | - Roger Ccama Alejo
- Departamento Académico de Ciencias Físico Matemáticas, Universidad Nacional del Altiplano—Puno, Puno, Perú
| | - Wilberth Caviedes Contreras
- Departamento Académico de Ciencias Básicas, Universidad Nacional Amazónica de Madre de Dios (UNAMAD), Madre de Dios, Perú
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de Oliveira BR, Zuffo AM, Aguilera JG, Steiner F, Ancca SM, Flores LAP, Gonzales HHS. Selection of Soybean Genotypes under Drought and Saline Stress Conditions Using Manhattan Distance and TOPSIS. Plants (Basel) 2022; 11:2827. [PMID: 36365280 PMCID: PMC9655377 DOI: 10.3390/plants11212827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/04/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
The search for soybean genotypes more adapted to abiotic stress conditions is essential to boost the development and yield of the crop in Brazil and worldwide. In this research, we propose a new approach using the concept of distance (or similarity) in a vector space that can quantify changes in the morphological traits of soybean seedlings exposed to stressful environments. Thus, this study was conducted to select soybean genotypes exposed to stressful environments (saline or drought) using similarity based on Manhattan distance and the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method. TOPSIS is a multi-criteria decision method for selecting the best alternative using the concept of distance. The use of TOPSIS is essential because the genotypes are not absolutely similar in both treatments. That is, just the distance measure is not enough to select the best genotype simultaneously in the two stress environments. Drought and saline stresses were induced by exposing seeds of 70 soybean genotypes to -0.20 MPa iso-osmotic solutions with polyethylene glycol-PEG 6000 (119.6 g L-1) or NaCl (2.36 g L-1) for 14 days at 25 °C. The germination rate, seedling length, and seedling dry matter were measured. We showed here how the genotypic stability of soybean plants could be quantified by TOPSIS when comparing drought and salinity conditions to a non-stressful environment (control) and how this method can be employed under different conditions. Based on the TOPSIS method, we can select the best soybean genotypes for environments with multiple abiotic stresses. Among the 70 tested soybean genotypes, RK 6813 RR, ST 777 IPRO, RK 7214 IPRO, TMG 2165 IPRO, 5G 830 RR, 98R35 IPRO, 98R31 IPRO, RK 8317 IPRO, CG 7464 RR, and LG 60177 IPRO are the 10 most stable genotypes under drought and saline stress conditions. Owing to high stability and gains with selection verified for these genotypes under salinity and drought conditions, they can be used as genitors in breeding programs to obtain offspring with higher resistance to antibiotic stresses.
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Affiliation(s)
| | - Alan Mario Zuffo
- Departamento de Agronomia, Universidade Estadual do Maranhão (UEMA), Campus de Balsas, Praça Gonçalves Dias, Balsas 65800-000, MA, Brazil
| | | | - Fábio Steiner
- Departamento de Agronomia, Universidade Estadual de Mato Grosso do Sul (UEMS), Cassilândia 79540-000, MS, Brazil
| | - Sheda Méndez Ancca
- Escuela Profesional de Ingeniería Pesquera, Universidad Nacional de Moquegua (UNAM), Ilo 18611, Peru
| | - Luis Angel Paucar Flores
- Facultad de Ingeniería de Industrias Alimentarias y Biotecnología, Universidad Nacional de Frontera (UNF), Sullana 20103, Peru
| | - Hebert Hernán Soto Gonzales
- Laboratorio de Biología Molecular y Biotecnología, Escuela Profesional de Ingeniería Ambiental, Universidad Nacional de Moquegua (UNAM), Ilo 18611, Peru
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Zuffo AM, Steiner F, Aguilera JG, Ratke RF, Barrozo LM, Mezzomo R, dos Santos AS, Gonzales HHS, Cubillas PA, Ancca SM. Selected Indices to Identify Water-Stress-Tolerant Tropical Forage Grasses. Plants 2022; 11:plants11182444. [PMID: 36145845 PMCID: PMC9504478 DOI: 10.3390/plants11182444] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/05/2022] [Accepted: 09/13/2022] [Indexed: 11/21/2022]
Abstract
Periods of soil water stress have been recurrent in the Cerrado region and have become a growing concern for Brazilian tropical pasture areas. Thus, the search for forage grasses more tolerant to water stress has intensified recently in order to promote more sustainable livestock. In a greenhouse experiment, the degree of water stress tolerance of nine tropical forage grass cultivars was studied under different soil water regimes. The investigation followed a 9 × 3 factorial design in four randomized blocks. Nine cultivars from five species of perennial forage grasses were tested: Urochloa brizantha (‘BRS Piatã’, ‘Marandu’, and ‘Xaraés’), Panicum maximum (‘Aruana’, ‘Mombaça’, and ‘Tanzânia’), Pennisetum glaucum (‘ADR 300’), Urochloa ruziziensis (‘Comum’), and Paspalum atratum (‘Pojuca’). These cultivars were grown in pots under three soil water regimes (high soil water regime—HSW (non-stressful condition), middle soil water regime—MSW (moderate water stress), and low soil water regime—LSW (severe water stress)). Plants were exposed to soil water stress for 25 days during the tillering and stalk elongation phases. Twelve tolerance indices, including tolerance index (TOL), mean production (MP), yield stability index (YSI), drought resistance index (DI), stress tolerance index (STI), geometric mean production (GMP), yield index (YI), modified stress tolerance (k1STI and k2STI), stress susceptibility percentage index (SSPI), abiotic tolerance index (ATI), and harmonic mean (HM), were calculated based on shoot biomass production under non-stressful (YP) and stressful (YS) conditions. Soil water stress decreased leaf area, plant height, tillering capacity, root volume, and shoot and root dry matter production in most cultivars, with varying degrees of reduction among tropical forage grasses. Based on shoot biomass production under controlled greenhouse conditions, the most water-stress-tolerant cultivars were P. maximum cv. Mombaça and cv. Tanzânia under the MSW regime and P. maximum cv. Aruana and cv. Mombaça under the LSW regime. P. maximum cv. Mombaça has greater adaptability and stability of shoot biomass production when grown under greenhouse conditions and subjected to soil water stress. Therefore, this forage grass should be tested under field conditions to confirm its forage production potential for cultivation in tropical regions with the occurrence of water stress. The MP, DI, STI, GMP, YI, k2STI, and HM tolerance indices were the most suitable for identifying forage grass cultivars with greater water stress tolerance and a high potential for shoot biomass production under LSW regime.
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Affiliation(s)
- Alan Mario Zuffo
- Department of Agronomy, State University of Maranhão, Balsas, MA 65800-000, Brazil
- Correspondence: or
| | - Fábio Steiner
- Department of Crop Science, State University of Mato Grosso do Sul, Cassilândia, MS 79540-000, Brazil
| | - Jorge González Aguilera
- Department of Agronomy, Federal University of Mato Grosso do Sul, Chapadão do Sul, MS 79560-000, Brazil
| | - Rafael Felippe Ratke
- Department of Agronomy, Federal University of Mato Grosso do Sul, Chapadão do Sul, MS 79560-000, Brazil
| | | | - Ricardo Mezzomo
- Department of Agronomy, State University of Maranhão, Balsas, MA 65800-000, Brazil
| | | | | | - Pedro Arias Cubillas
- Escuela de Posgrado-Doctorado en Ciencias Ambientales, Universidad Nacional Jorge Basadre Grohmann (UNJBG), Tacna 23001, Peru
| | - Sheda Méndez Ancca
- Escuela Profesional de Ingeniería Pesquera, Universidad Nacional de Moquegua (UNAM), Ilo 18601, Peru
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Zuffo AM, Ratke RF, Okla MK, Al-Hashimi A, González Aguilera J, Trento ACS, Pereira da Silva N, de Souza ED, Nogueira BKA, Coutinho JH, Steiner F, de Alcântara Neto F, da Silva Júnior GB, dos Santos Silva FC, Sobrinho RL, AbdElgawad H. Understanding the contribution of soybean crop residues inoculated with Bradyrhizobium spp. and not harvested on nitrogen supply in off-season corn cultivars. PLoS One 2022; 17:e0269799. [PMID: 35731745 PMCID: PMC9216555 DOI: 10.1371/journal.pone.0269799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 05/30/2022] [Indexed: 11/18/2022] Open
Abstract
Excessive rainfall in the soybean preharvest period can make mechanized crop harvesting technically and economically unfeasible, causing 100% losses in soybean grain yield. An alternative to reduce the economic losses of farmers would be using unharvested soybean crop residues as a source of nitrogen (N) for the subsequent corn crop. However, a question that still needs to be understood is whether the amount of N released from unharvested soybean residues (straw and grains) is sufficient to meet all the nutritional demand for this nutrient in the off-season corn. Therefore, this study investigated the impact of unharvested soybean crop residue persistence on the yield response of off-season corn crop (Zea mays L.) to the application of N fertilizer rates when grown in tropical Cerrado soils of medium and high fertility. Four simple corn hybrids (SYN7G17 TL, 30F53VYHR, B2433PWU, and AG 8700 PRO3) were grown in soils of medium fertility and medium acidity level (UFMS 1) and high fertility and low acidity level (UFMS 2) and fertilized with five of N fertilizer rates (0, 40, 80, 120, and 160 kg ha-1 of N) applied at 30 days after emergence (DAE). Canonical correlation analysis (CCA) was used to investigate the interrelationships between the groups of independent (agricultural production areas, corn cultivars, and N application rates) and dependent (corn agronomic traits) variables. Crop residues remaining on the soil surface from soybeans not harvested and inoculated with Bradyrhizobium spp. can supply most of the nitrogen requirement of off-season corn grown in succession, especially in tropical soils of medium fertility. However, in high-fertility tropical soils, the maximum grain yield potential of off-season corn cultivars can be obtained with the application of mineral N fertilizer in supplement the amount of nitrogen released from unharvested soybean residues. Therefore, the N requirement depends on the corn cultivar and the agricultural production area. However, our results show that when off-season corn is grown on unharvested soybean residues, nitrogen fertilization in topdressing can be dispensed. The agricultural area with high fertility soil (UFMS 2) enhances the grain yield of the off-season corn crop. The corn cultivar AG 8700 PRO3 has a higher thousand-grain mass and high grain yield potential under Brazilian Cerrado conditions.
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Affiliation(s)
- Alan Mario Zuffo
- Universidade Estadual do Maranhão, Campus de Balsas, Praça Gonçalves Dias, Balsas, MA, Brasil
| | | | - Mohammad K. Okla
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Abdulrahman Al-Hashimi
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | | | | | | | | | | | | | - Fábio Steiner
- Universidade Estadual do Mato Grosso do Sul, Unidade Universitária de Cassilândia, Cassilândia, MS, Brasil
| | - Francisco de Alcântara Neto
- Departamento de Fitotecnia Ininga, Universidade Federal do Piauí, Campus Universitário Ministro Petrônio Portella, Teresina, PI, Brasil
| | - Gabriel Barbosa da Silva Júnior
- Departamento de Fitotecnia Ininga, Universidade Federal do Piauí, Campus Universitário Ministro Petrônio Portella, Teresina, PI, Brasil
| | | | | | - Hamada AbdElgawad
- Department of Biology, Laboratory for Molecular Plant Physiology and Biotechnology, University of Antwerp, Antwerpen, Belgium
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Krisai P, Streicher O, Meyre P, Haemmerle P, Steiner F, Reddiess P, Zeljkovic I, Pavlovic N, Ammann P, Roten L, Reichlin T, Madaffari A, Kuehne M, Novak J, Sticherling C. P993Incidence of atrial fibrillation early after cavotricuspid isthmus ablation. Europace 2020. [DOI: 10.1093/europace/euaa162.184] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Atrial fibrillation (AF) is a common finding in patients undergoing cavotricuspid isthmus ablation for isthmus dependent right atrial flutter (RAF). Little is known about the time of its occurrence.
Purpose
We aimed to investigate the incidence of AF early after RAF ablation in a well-defined, prospective cohort.
Methods
A total of 255 participants with RAF ablation from 5 centers and at least one completed follow-up were included. Structured clinical follow-up was performed at 3, 6 and 12 months including a 24 hour Holter-ECG. The endpoint was incidence of AF detected clinically or by Holter-ECG. Risk factors associated with the occurrence of AF were assessed using separate, univariate Cox proportional-hazards models.
Results
Mean age was 67 years, 80% were male and previous episodes of AF were known in 40%. Over a mean follow-up of 7.4 (±4.4) months AF was detected in 35 (13.7%) participants after RAF ablation (Figure A). After 3, 6 and 12 months AF was detected in 18 (7.1%), 30 (11.7%) and 34 (13.3%) patients. No difference in the incidence of AF after RAF ablation was found comparing patients with and without a history of AF (log-rank p value = 0.44) (Figure B). Comparing patients with and without AF during follow-up, there was no difference in age (68 vs 66 years, p = 0.36), sex (69 vs 81% male, p = 0.08), prior heart failure (29 vs 19%, p = 0.20), hypertension (43 vs 38%, p = 0.56) or left atrial volume (46.6 vs 39.6 ml, p = 0.10), but patients with previous AF had a lower left ventricular ejection fraction (LVEF) (45.7 vs 52.3%, p = 0.02). In separate, univariate Cox proportional-hazards models only increasing LVEF (Hazard ratio 0.97, 95% confidence interval (0.95; 0.99, p = 0.02)) was associated with a lower risk of incident AF after RAF ablation, but no other risk factor.
Conclusions
AF occurred in 13.7% of patients early after cavotricuspid isthmus ablation for RAF. There was no difference in the occurrence of AF between patients with and without previously known episodes of AF. Only impaired LVEF was associated with AF occurrence.
Abstract Figure
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Affiliation(s)
- P Krisai
- University Hospital Basel, Cardiology, Basel, Switzerland
| | - O Streicher
- University Hospital Basel, Cardiology, Basel, Switzerland
| | - P Meyre
- University Hospital Basel, Cardiology, Basel, Switzerland
| | - P Haemmerle
- University Hospital Basel, Cardiology, Basel, Switzerland
| | - F Steiner
- University Hospital Basel, Cardiology, Basel, Switzerland
| | - P Reddiess
- University Hospital Basel, Cardiology, Basel, Switzerland
| | - I Zeljkovic
- University of Zagreb School of Medicine, KBC Sestre Milosrdnice, Zagreb, Croatia
| | - N Pavlovic
- University of Zagreb School of Medicine, KBC Sestre Milosrdnice, Zagreb, Croatia
| | - P Ammann
- Cantonal Hospital St. Gallen, Cardiology department, St Gallen, Switzerland
| | - L Roten
- Bern University Hospital, Inselspital, Department of Cardiology, Bern, Switzerland
| | - T Reichlin
- Bern University Hospital, Inselspital, Department of Cardiology, Bern, Switzerland
| | - A Madaffari
- University Hospital Basel, Cardiology, Basel, Switzerland
| | - M Kuehne
- University Hospital Basel, Cardiology, Basel, Switzerland
| | - J Novak
- Cantonal Hospital Solothurn, Herz- und Nierenzentrum Aare AG, Solothurn, Switzerland
| | - C Sticherling
- University Hospital Basel, Cardiology, Basel, Switzerland
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Abstract
ABSTRACT The aluminum source to produce toxicity in upland rice in nutrient solution experiments is not yet well established, althought the aluminum potassium sulfate has been utilized source to produce aluminum toxicity. However, in recent studies have used aluminum chloride. The aim of this study was to evaluate the capacity of aluminum sources and doses to produce toxicity in upland rice plants grown in nutrient solution. The experiment was arranged in a block randomized design, in a 2 x 5 factorial scheme and four repetitions. The treatments were two aluminum sources (aluminum potassium sulfate - AlK(SO4)2.12H2O and aluminum chloride - AlCl3.6H2O) and five aluminum doses in nutrient solution (0, 370, 740, 1100 and 1480 μmol L-1). The experiment was conducted in a greenhouse in Botucatu city, São Paulo state, Brazil, starting in April 2012, and was carried out for 56 days from transplanting of the seedlings. Using aluminum chloride, the rice plants show lower production of root and total dry weight, area and root volume, medium and thick root length, potassium and sulfur contents and accumulations. Using aluminum potassium sulfate, there are lower aluminum activity and availability, besides the formation of large amount of aluminum compounds non-toxic to the plants (aluminum sulfate) in the nutrient solution. The aluminum doses between 1100 to 1480 µmol L-1, corresponding to aluminum activity of 336.8 to 429.0 µmol L-1 of aluminum chloride as source, are more effective to produce aluminum toxicity in upland rice plants grown in nutrient solution.
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Affiliation(s)
| | | | | | - Arianne Moniz
- Universidade Estadual Paulista “Júlio de Mesquita Filho”, Brazil
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Silva ER, Zoz J, Oliveira CES, Zuffo AM, Steiner F, Zoz T, Vendruscolo EP. Can co-inoculation of Bradyrhizobium and Azospirillum alleviate adverse effects of drought stress on soybean (Glycine max L. Merrill.)? Arch Microbiol 2019; 201:325-335. [PMID: 30617456 DOI: 10.1007/s00203-018-01617-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 12/13/2018] [Accepted: 12/29/2018] [Indexed: 12/27/2022]
Abstract
Harnessing the beneficial potential of plant growth-promoting rhizobacteria may be an alternative strategy to improve plant tolerance to drought stress. The effect of inoculation with Bradyrhizobium japonicum and Azospirillum brasilense either alone or in combination on the plant growth and drought tolerance of soybean [Glycine max (L.) Merrill.] was investigated in this study in greenhouse conditions. Treatments were arranged in a randomized block design in a 3 × 4 factorial: three irrigation regimes [100% of pot capacity-PC (well-watered control), 50% of PC (moderate stress) and 25% of PC (severe stress)] and four inoculation treatments [control (non-inoculated), inoculation with B. japonicum, inoculation with A. brasilense, and co-inoculation with B. japonicum and A. brasilense]. Leaf relative water content, cell membrane stability, root nodulation, plant growth, and morphophysiological indexes were recorded. The inoculation of soybean plants with B. japonicum and A.brasilense either alone or in combination improved leaf membrane stability under drought stress conditions when compared to non-inoculated plants; however, this lower damage to cell membranes was not sufficient to maintain the leaf water content of the plant under drought stress. Plants co-inoculated with B. japonicum and A.brasilense improved the root nodulation under severe drought conditions. Inoculation of B. japonicum and A. brasilense either alone or in combination reduced the pod abortion rate under moderate drought stress, but had no effect under severe drought stress. In summary, the co-inoculation of A. brasilense and B. japonicum alleviate adverse effects limited by drought stress to the growth of soybeans.Author: Please check and confirm that the authors [Elijanara Raissa Silva, Carlos Eduardo Silva Oliveira, Alan Mario Zuffo, Eduardo Pradi Vendruscolo] and their initials have been correctly identified and amend if necessary.The authors were correctly identified.
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Affiliation(s)
- Elijanara Raissa Silva
- Department of Crop Science, State University of Santa Catarina, UDESC, Lages, Santa Catarina, 88035-901, Brazil
| | - Jardel Zoz
- Department of Crop Science, State University of Mato Grosso do Sul, UEMS, Cassilândia, Mato Grosso Do Sul, 79540-000, Brazil
| | - Carlos Eduardo Silva Oliveira
- Department of Crop Science, State University of Mato Grosso do Sul, UEMS, Cassilândia, Mato Grosso Do Sul, 79540-000, Brazil
| | - Alan Mario Zuffo
- Department of Agronomy, Federal University of Mato Grosso do Sul, UFMS, Chapadão do Sul, MS, 79560-000, Brazil
| | - Fábio Steiner
- Department of Crop Science, State University of Mato Grosso do Sul, UEMS, Cassilândia, Mato Grosso Do Sul, 79540-000, Brazil.
| | - Tiago Zoz
- Department of Crop Science, State University of Mato Grosso do Sul, UEMS, Cassilândia, Mato Grosso Do Sul, 79540-000, Brazil
| | - Eduardo Pradi Vendruscolo
- Department of Crop Science, State University of Mato Grosso do Sul, UEMS, Cassilândia, Mato Grosso Do Sul, 79540-000, Brazil
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Rohringer W, Fischer D, Steiner F, Mazets IE, Schmiedmayer J, Trupke M. Non-equilibrium scale invariance and shortcuts to adiabaticity in a one-dimensional Bose gas. Sci Rep 2015; 5:9820. [PMID: 25867640 PMCID: PMC4394891 DOI: 10.1038/srep09820] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 03/18/2015] [Indexed: 11/09/2022] Open
Abstract
We present experimental evidence for scale invariant behaviour of the excitation spectrum in phase-fluctuating quasi-1d Bose gases after a rapid change of the external trapping potential. Probing density correlations in free expansion, we find that the temperature of an initial thermal state scales with the spatial extension of the cloud as predicted by a model based on adiabatic rescaling of initial eigenmodes with conserved quasiparticle occupation numbers. Based on this result, we demonstrate that shortcuts to adiabaticity for the rapid expansion or compression of the gas do not induce additional heating.
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Affiliation(s)
- W. Rohringer
- Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1020 Vienna, Austria
| | - D. Fischer
- Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1020 Vienna, Austria
| | - F. Steiner
- Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1020 Vienna, Austria
| | - I. E. Mazets
- Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1020 Vienna, Austria
- Ioffe Physical-Technical Institute of the Russian Academy of Sciences, 194021 St. Petersburg, Russia
- Wolfgang Pauli Institute, 1090 Vienna, Austria
| | - J. Schmiedmayer
- Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1020 Vienna, Austria
| | - M. Trupke
- Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1020 Vienna, Austria
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Steiner F, Evans J, Marsh R, Rigby P, James S, Sutherland K, Wickens R, Nedev N, Kelly B, Tan S. Mouth opening and trismus in patients undergoing curative treatment for head and neck cancer. Int J Oral Maxillofac Surg 2015; 44:292-6. [DOI: 10.1016/j.ijom.2014.12.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 11/03/2014] [Accepted: 12/10/2014] [Indexed: 11/16/2022]
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Schwartz E, Meltzer E, Mendelson M, Tooke A, Steiner F, Gautret P, Friedrich-Jaenicke B, Libman M, Bin H, Wilder-Smith A, Gubler DJ, Freedman DO, Parola P. Detection on four continents of dengue fever cases related to an ongoing outbreak in Luanda, Angola, March to May 2013. Euro Surveill 2013. [DOI: 10.2807/ese.18.21.20488-en] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In April 2013, ten cases of dengue fever in travellers returning from Luanda, Angola, to five countries on four continents, were reported to the globally distributed GeoSentinel Surveillance network. Dengue virus serotype 1 was identified in two cases. The findings indicate that a major dengue outbreak is currently ongoing in Luanda. This report illustrates how cases from an emerging arboviral epidemic focus can spread internationally and highlights the risk of dissemination of a vector-borne disease into receptive areas
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Affiliation(s)
- E Schwartz
- Center for Geographic Medicine and Department of Medicine C the Sheba medical center, Tel Hashomer & Sackler School of Medicine, Tel Aviv, Israel
| | - E Meltzer
- Center for Geographic Medicine and Department of Medicine C the Sheba medical center, Tel Hashomer & Sackler School of Medicine, Tel Aviv, Israel
| | - M Mendelson
- Division of Infectious Diseases & HIV Medicine, Department of Medicine, Groote Schuur Hospital, University of Cape Town, South Africa
| | - A Tooke
- Department of Medicine, 2 Military Hospital, Wynberg, Cape Town, South Africa
| | - F Steiner
- Institut für Tropenmedizin und Internationale Gesundheit Charité - Universitätsmedizin Berlin, Germany
| | - P Gautret
- Assistance Publique Hôpitaux de Marseille, CHU Nord, Pôle Infectieux, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
- Aix Marseille Université, Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), Faculté de Médecine, Marseille, France
| | - B Friedrich-Jaenicke
- Institut für Tropenmedizin und Internationale Gesundheit Charité - Universitätsmedizin Berlin, Germany
| | - M Libman
- J.D. MacLean Centre for Tropical Medicine, McGill University Health Centre Montreal, Quebec Canada
| | - H Bin
- The Central Virology Laboratory, Ministry of Health, Tel Hashomer Israel
| | - A Wilder-Smith
- Institute of Public Health, University of Heidelberg, Germany
| | - D J Gubler
- Program on Emerging Infectious Diseases- Duke-NUS Graduate Medical School, Singapore
| | - D O Freedman
- University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - P Parola
- Aix Marseille Université, Unité de Recherche en Maladies Infectieuses et Tropicales Emergentes (URMITE), Faculté de Médecine, Marseille, France
- Assistance Publique Hôpitaux de Marseille, CHU Nord, Pôle Infectieux, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
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Schwartz E, Meltzer E, Mendelson M, Tooke A, Steiner F, Gautret P, Friedrich-Jaenicke B, Libman M, Bin H, Wilder-Smith A, Gubler D, Freedman DO, Parola P. Detection on four continents of dengue fever cases related to an ongoing outbreak in Luanda, Angola, March to May 2013. Euro Surveill 2013; 18:20488. [PMID: 23725977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023] Open
Affiliation(s)
- E Schwartz
- Center for Geographic Medicine and Department of Medicine C the Sheba medical center, Tel Hashomer & Sackler School of Medicine, Tel Aviv, Israel
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12
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Shakulashvili N, Revia R, Steiner F, Engelhardt H. Simultaneous Determination of Various Classes of Pesticides Using Micellar Electrokinetic Capillary Chromatographyin Combination with Solid-Phase Extraction. Chromatographia 2004. [DOI: 10.1365/s10337-004-0350-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Steiner F, Kind C, Aebi C, Wyler-Lazarevitch CA, Cheseaux JJ, Rudin C, Molinari L, Nadal D. Growth in human immunodeficiency virus type 1-infected children treated with protease inhibitors. Eur J Pediatr 2001; 160:611-6. [PMID: 11686506 DOI: 10.1007/s004310100820] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
UNLABELLED To determine the long-term impact of antiretroviral treatment (ART) including a protease inhibitor (PI) on growth in children infected with the human immunodeficiency virus type I (HIV-1), a prospective multi-centre study was conducted in Switzerland on HIV-1-infected children treated with ritonavir (350 mg/m2 twice a day) or nelfinavir (20-30 mg/kg three times a day) in addition to two nucleoside reverse transcriptase inhibitors. Length or height of HlV-1-infected children from before (weeks -72, -48, -24, and 0) and after (weeks +24, +48, and +72) introducing a PI to the ART were compared. To allow for age- and gender-independent assessment, values were expressed in standard deviations from the mean. Complete data sets on body length were available for 44 children after 72 weeks of treatment with a PI. Preceding initiation of a PI, there was an overall decline in growth to -0.3 SD. Following start of a PI, an increase in growth was noted from weeks 0 to +24 (+0.33 SD, P=0.02) and from weeks +48 to +72 (+0.21 SD, P=0.03). The increase in growth was restricted to children with stunting before a PI was introduced (P=0.03), and was more marked in children younger than 3 years of age. CONCLUSION children infected with human immunodeficiency virus type 1 showed catch-up growth after addition of a protease inhibitor to their antiretroviral treatment, but this phenomenon was observed almost exclusively in children under 3 years of age.
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Affiliation(s)
- F Steiner
- Division of Infectious Diseases, University Children's Hospital, Zurich, Switzerland
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15
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16
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17
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Abstract
Capillary electrochromatography (CEC) requires stationary phases that enable appropriate electroosmotic propel under various conditions. Analyte retention can be controlled through hydrophobic or electrostatic interaction with the packing material. The development and characterization of new strong anion-exchange materials with additional hydrophobic moieties (SAX/C18 mixed-mode phases) is described. The synthesis was based on polymer encapsulation of porous silica. The phases were systematically characterized by means of elemental analyses, HPLC frontal analyses and CEC experiments. The studies focused on the influence of various parameters (e.g., pH, kind of buffer, capillary wall) on the electroosmotic flow (EOF). Phases with high anion-exchange capacity generated a fast and constant EOF over a wide pH range. Long-time stability of EOF and hydrophobic retention under CEC conditions were demonstrated within the course of 100 consecutive injections. The applicability of the SAX/C18 phases in appropriate buffer systems is demonstrated for neutral, acidic and basic compounds.
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Affiliation(s)
- B Scherer
- University of the Saarland, Instrumental/Environmental Analysis, Saarbrücken, Germany
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18
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Abstract
Recent Italian laws mandate the consideration of environmental factors in local plans, especially at the provincial level of government. The plan for the province of Cremona in northern Italy illustrates the integration of the environment in provincial-level planning. The Cremona plan was developed through an ecological planning approach that occurred from 1994 to 1998. As part of this process, the planning team designed an environmental sustainability index. This index was integrated with an environmental capability analysis. To improve the quality of the Cremona landscape, the planning team developed an ecological network. This network seeks to weave together the natural areas of the province, especially by connecting provincial parks to regional river parks throughout Lombardy. The experience of the Cremona provincial plan has implications for environmental management elsewhere in Italy, Europe, and abroad.
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Affiliation(s)
- M Magoni
- Dipartimento di Scienze del Territorio, Facoltà di Architectura, Politecnico di Milano, Italy
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Nadal D, Bossart W, Zucol F, Steiner F, Berger C, Lips U, Altwegg M. Community-acquired pneumonia in children due to Mycoplasma pneumoniae: diagnostic performance of a seminested 16S rDNA-PCR. Diagn Microbiol Infect Dis 2001; 39:15-9. [PMID: 11173186 DOI: 10.1016/s0732-8893(00)00216-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [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: 12/22/2022]
Abstract
A 16S rDNA-PCR assay for Mycoplasma pneumoniae applied to nasopharyngeal secretion (NPS) or pharyngeal swab (PS) from children with community-acquired pneumonia (CAP) was prospectively compared to serological tests including complement fixation (CF) test, a mu-capture enzyme immuno assay (EIA) for the detection of specific IgM, and an EIA for the detection of specific IgG. During a 24-months-period diagnosis of active M. pneumoniae infection was established in 32 (12.6%) of 253 patients for whom paired sera were available. In the acute phase, the sensitivities of PCR from NPS and PS, CF test, IgM EIA, and IgG EIA were 90.0%, 79.3%, 46.9%, 78.1%, and 59.4%, respectively. The corresponding specificities were 98.1%, 98.6%, 97.6%, 87.1%, and 72.4%, respectively. Thus, the 16S rDNA-PCR assay provides a highly sensitive and accurate tool for the rapid diagnosis of M. pneumoniae infection in children with CAP.
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Affiliation(s)
- D Nadal
- Division of Infectious Diseases, University Children's Hospital of Zurich, CH-8032, Zurich, Switzerland.
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20
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Abstract
Nonaqueous capillary electrophoresis (NACE) is the application of a conductive electrolyte dissolved in either one organic solvent or a mixture of several organic solvents to carry out zone electrophoresis or related techniques in fused-silica capillaries. A complete review on the fundamentals, the optimization of analytical methods, practical considerations, and applications is given. To explain the differences to CE in aqueous media, a brief summary on solvent properties and molecular interactions in solutions introduces the reader into these fields. The use of additives to tune separation selectivity by means beyond a pure zone-electrophoretic mechanism is discussed in detail for organic media. Special detection techniques providing high potential for NACE are presented. Data on the precision of NACE methods and a list of relevant applications are included. More specialized applications like the determination of physicochemical constants in NACE or the setup of a semipreparative mode are described.
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Affiliation(s)
- F Steiner
- University of the Saarland, Instrumental/Environmental Analysis, Saarbrücken, Germany.
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21
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Nadal D, Steiner F, Cheseaux JJ, Lazarevitch CA, Aebi C, Kind C, Rudin C. Long-term responses to treatment including ritonavir or nelfinavir in HIV-1-infected children. Pediatric AIDS Group of Switzerland. Infection 2000; 28:287-96. [PMID: 11073135 DOI: 10.1007/s150100070021] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [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: 10/27/2022]
Abstract
BACKGROUND Knowledge concerning the long-term antiretroviral and immunological efficacy of protease inhibitors in children is limited. PATIENTS AND METHODS An open-label, prospective, multicenter clinical trial was conducted over a period of 72 weeks in Switzerland. 60 HIV-1 infected children (aged 0.3-16.9 years) naive to protease inhibitors were enrolled. Ritonavir or nelfinavir and at least one new nucleoside reverse transcriptase inhibitor were introduced into the current treatment regimen. HIV-1 RNA levels and CD4 cell counts were monitored after introducing the protease inhibitor, and the tolerability and safety of the drugs were assessed. RESULTS Dictated by chronological availability, 37 children received ritonavir and 23 nelfinavir. At baseline, children given ritonavir had higher mean plasma HIV-1 RNA levels (5.03 vs 4.63 log10 copies/ml; p = 0.001) and lower mean CD4 cell counts (277 vs 555 cells/microl; p = 0.009) than children given nelfinavir. Antiretroviral treatment (ART) naive children showed higher mean plasma HIV-1 RNA levels than non-naive (5.18 vs 4.64 log10 copies/ml; p = 0.02). The decline in plasma HIV-1 RNA levels 72 weeks after treatment with ritonavir and nelfinavir was -2.17 and -1.30 log10 copies/ml, respectively (p = 0.006) and in ART-naive vs non-naive patients -2.70 vs -1.39 log10 copies/ml (p < or = 0.01). 69% of ART-naive patients and 32% of non-naive patients achieved sustained plasma HIV-1 RNA levels < 400 copies/ml. Increases in CD4 cells were higher in ART-naive compared to non-naive patients (p < 0.04). CONCLUSION The antiretroviral and immunologic benefits of protease inhibitors are more profound in ART-naive than in non-naive children.
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Affiliation(s)
- D Nadal
- Div. of Pediatric Infectious Diseases, University Children's Hospital, Zurich, Switzerland. [corrected]
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22
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Abstract
One of the reasons for the immense interest in capillary electrochromatography (CEC) is its feature to combine chromatographic selectivity with the high efficiency and the miniaturization potential of capillary electrophoresis (CE). The capability of commercial CE instruments to run CEC has enforced the readiness of users and researchers to work on this separation technique. Nevertheless, to fully exploit the potential of CEC, a routine CE device can certainly not fulfill all requirements. Two different approaches have been made to overcome this problem. The first was to modify commercial CE instruments for various demands. Pressurization of the packed capillary to prevent "air" bubble formation, gradient elution capabilities and thermostating devices allowing a greater flexibility in column designs have been implemented in CE instruments of several manufacturers. A completely different approach is the development of modular laboratory-made instrumentation dedicated to special CEC requirements. In order to increase mobile phase velocity and thus the speed of analysis the availability of voltages higher than 30 kV was accomplished in some of these devices. Gradient elution was achieved by either coupling of gradient LC systems or an electroosmotic generation of the changing eluent composition. When a pressure gradient is applied between both column ends in addition to the voltage gradient, a hybrid between capillary HPLC and CEC results. This chromatographic mode is named pressure-assisted electrochromatography (PEC). Either CE instruments equipped with additional HPLC pumps or modular laboratory-made devices are suitable for PEC. In CEC, sensitivity for UV detection is rather poor due to the short optical path length for on-column detection in capillary separation techniques. A special cell design with enhanced light path is presented and further principles like, e.g., fluorescence detection and coupling to mass spectrometry are discussed.
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Affiliation(s)
- F Steiner
- University of the Saarland, Instrumental/Environmental Analysis, Saarbrücken, Germany
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Vail G, Kohler R, Steiner F, Donepudi R. Successful treatment of Mycobacterium fortuitum prosthetic valve endocarditis: case report. Clin Infect Dis 2000; 30:629-30. [PMID: 10722472 DOI: 10.1086/313720] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- G Vail
- Division of Infectious Diseases, Department of Internal Medicine, Indiana University School of Medicine, University Hospital, Indianapolis, IN 46202-2879, USA.
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24
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Elsholz O, Frank C, Matyschok B, Steiner F, Wurl O, Stachel B, Reincke H, Schulze M, Ebinghaus R, Hempel M. On-line determination of mercury in river water at the German monitoring station Schnackenburg/Elbe. Fresenius J Anal Chem 2000; 366:196-9. [PMID: 11225927 DOI: 10.1007/s002160050038] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A monitor is described which provides the on-line determination of mercury in river water at concentrations from 20 to 1000 ng/L. The measurement includes an on-line digestion with Br-/BrO3- and UV-radiation. Each determination is controlled by an on-line addition of 50 and 100 ng/L mercury carried out by pre-dilution of a 500 and 1000 ng/L stock solution using sequential injection analysis (SIA). One cycle of analysis takes 20 min and results in nine signals. A five days stand-alone operation has been performed successfully. Details are also published at web page: "http/www.rzbd.fh-hamburg.de/-prmercol".
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25
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Nadal D, Böni J, Kind C, Varnier OE, Steiner F, Tomasik Z, Schüpbach J. Prospective evaluation of amplification-boosted ELISA for heat-denatured p24 antigen for diagnosis and monitoring of pediatric human immunodeficiency virus type 1 infection. J Infect Dis 1999; 180:1089-95. [PMID: 10479135 DOI: 10.1086/315012] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.6] [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: 11/04/2022] Open
Abstract
The performance in pediatric human immunodeficiency virus type 1 (HIV-1) infection of a signal-amplification boosted ELISA for HIV-1 p24 antigen in plasma after heat-mediated immune complex dissociation was prospectively compared with polymerase chain reaction-based procedures. Diagnostic sensitivity and specificity of the p24 antigen test were 100% and 99.2%, respectively. Quantification revealed RNA in 85.7% and p24 antigen in 87.4% of 230 samples from 25 infected children. Concentrations of these indices in individual samples correlated (P<.0001). Introduction or modification of antiretroviral treatment showed concordant responses of RNA and p24 antigen in 39 (90.7%) of 43 instances. The treatment-induced changes in concentrations of RNA were higher than those of p24 antigen in 11 instances. In 1 instance, however, the concentration change of p24 antigen was greater than that of RNA (P=. 002). Variation of RNA concentrations was more marked than that of p24 antigen (P=.002). The p24 antigen test was equivalent to PCR for diagnosing and monitoring pediatric HIV-1 infection.
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Affiliation(s)
- D Nadal
- Pediatric Infectious Diseases Unit, Universitäts-Kinderklinik, CH-8032 Zurich, Switzerland.
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26
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Abstract
The complete exon-intron organization of the murine gene encoding sarcomeric myomesin has been determined. The gene is composed of 38 exons and 37 introns, spanning approximately 105 kb of DNA. Intron positions and phases are essentially identical to those identified in M-protein. They are related to the modular structure of myomesin, which is composed almost entirely of immunoglobulin and fibronectin type III domains. Nearly all repeats follow a two exon-one domain structure. The start and end of each domain are defined by introns in phase I, while internal introns are more divergent in position and very rarely use phase I. Genomic Southern blotting and reverse transcription-polymerase chain reaction revealed that differential splicing of a single exon gives rise to two polypeptides, described in the literature as myomesin and skelemin, respectively. A single transcriptional start point was detected in both skeletal and cardiac muscle. Analysis of the presumptive promoter region revealed several potential regulatory elements. CAT expression assays using promoter deletion constructs identified three regions that seem to be important for the muscle-specific transcriptional activation of the myomesin gene. These results provide the basis for a comparative analysis of the regulation of myomesin and M-protein genes in vivo.
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Affiliation(s)
- F Steiner
- Department of Cell Biology, University of Potsdam, Lennéstrasse 7a, Potsdam, D-14471, Germany
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27
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Nadal D, Steiner F, Cheseaux JJ, Rudin C. Ritonavir promotes increased growth in HIV-infected children. Paediatric AIDS Group of Switzerland. AIDS 1998; 12:2356-7. [PMID: 9863884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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Obermann WM, van der Ven PF, Steiner F, Weber K, Fürst DO. Mapping of a myosin-binding domain and a regulatory phosphorylation site in M-protein, a structural protein of the sarcomeric M band. Mol Biol Cell 1998; 9:829-40. [PMID: 9529381 PMCID: PMC25310 DOI: 10.1091/mbc.9.4.829] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [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: 02/06/2023] Open
Abstract
The myofibrils of cross-striated muscle fibers contain in their M bands cytoskeletal proteins whose main function seems to be the stabilization of the three-dimensional arrangement of thick filaments. We identified two immunoglobin domains (Mp2-Mp3) of M-protein as a site binding to the central region of light meromyosin. This binding is regulated in vitro by phosphorylation of a single serine residue (Ser76) in the immediately adjacent amino-terminal domain Mp1. M-protein phosphorylation by cAMP-dependent kinase A inhibits binding to myosin LMM. Transient transfection studies of cultured cells revealed that the myosin-binding site seems involved in the targeting of M-protein to its location in the myofibril. Using the same method, a second myofibril-binding site was uncovered in domains Mp9-Mp13. These results support the view that specific phosphorylation events could be also important for the control of sarcomeric M band formation and remodeling.
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Affiliation(s)
- W M Obermann
- Max-Planck-Institute for Biophysical Chemistry, Department of Biochemistry, D-37077 Göttingen, Germany
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29
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Steiner F, Weber K, Fürst DO. Structure and expression of the gene encoding murine M-protein, a sarcomere-specific member of the immunoglobulin superfamily. Genomics 1998; 49:83-95. [PMID: 9570952 DOI: 10.1006/geno.1998.5220] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [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: 11/22/2022]
Abstract
The complete exon-intron organization of the murine gene encoding M-protein, a structural protein of sarcomeric myofibrils, was determined. The gene is composed of 37 exons and 36 introns, spanning approximately 75 kb of DNA. Intron positions are related to the modular structure of M-protein, which is composed essentially of immunoglobulin and fibronectin type III domains. Almost all repeats follow a two exon-one domain structure. The beginning and end of each domain are defined by introns in phase I; internal introns are more divergent in position and very rarely use phase I. A single transcriptional start point was detected in both skeletal and cardiac muscle. Analysis of the prospective promoter region revealed several potential regulatory elements. CAT expression assays using promoter deletion constructs identified three regions that seem to be most important for the muscle-specific transcription activation of the M-protein gene. These results provide the first complete characterization of a gene for a member of the intracellular branch of the immunoglobulin superfamily.
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Affiliation(s)
- F Steiner
- Department of Biochemistry, Max-Planck-Institute for Biophysical Chemistry, Göttingen, Germany
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Schwartz JD, Shamamian P, Schwartz DS, Grossi EA, Jacobs CE, Steiner F, Minneci PC, Baumann FG, Colvin SB, Galloway AC. Cardiopulmonary bypass primes polymorphonuclear leukocytes. J Surg Res 1998; 75:177-82. [PMID: 9655092 DOI: 10.1006/jsre.1997.5287] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [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: 01/21/2023]
Abstract
Polymorphonuclear leukocyte (PMN) superoxide (.O2-) production has been implicated in the pathogenesis of cardiopulmonary bypass (CPB)-related end organ injury. PMN "priming" has been described as an event which enhances the release of .O2- following a second, activating insult. We hypothesized that PMN priming occurs during CBP and is temporally related to the plasma level of complement (C3a), interleukin (IL)-6, and IL-8. PMNs were isolated from 10 CPB patients pre-bypass (preCPB), 5 min after protamine administration (PROT), and at 6 and 24 h post-CPB. PMN .O2- production was measured by a cytochrome c reduction assay in the presence or absence of either phorbol 12-myristate-13-acetate (PMA, 0.4 microgram/ml) or N-formyl-methionyl-leucyl-phenylalanine (FMLP, 1 microM) and also after priming with 2000 nM platelet-activating factor (PAF) followed by activation with either PMA or FMLP. Plasma levels of C3a, IL-6, and IL-8 were determined by enzyme-linked immunosorbent assay. PMA-activated PMN .O2- production was significantly elevated at 6 h post-CPB compared to pre-CPB levels (11.04 +/- 0.9 vs 7.62 +/- 0.57, P = 0.009), indicating that CPB is associated with in vivo PMN priming. When PMNs were primed in vitro with PAF and then activated with PMA or FMLP, .O2- release at 6 h post-CPB was also significantly greater than pre-CPB levels (16.04 +/- 0.74 vs 12.2 +/- 0.92, P = 0.038; and 17.33 +/- 1.38 vs 13.33 +/- 1.35, P < 0.05), indicating that CPB acts synergistically with PAF to prime PMNs. Levels of C3a rose significantly over pre-CPB levels at PROT (P = 0.001), and IL-6 and IL-8 rose over pre-CPB levels at 6 h post-CPB (P = 0.01 and P = 0.006, respectively). These findings demonstrate that CPB not only directly primes PMNs, but also potentiates priming of PMNs by PAF. This "primed" PMN state, which coincided with the increased plasma levels of inflammatory mediators, may suggest a mechanism of predisposition to organ dysfunction following CPB.
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Affiliation(s)
- J D Schwartz
- Department of Surgery, New York University Medical Center, New York 10016, USA
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Vella S, Steiner F, Schlumbom V, Zurbrügg R, Wiesmann UN, Schaffner T, Wermuth B. Mutation of ornithine transcarbamylase (H136R) in a girl with severe intermittent orotic aciduria but normal enzyme activity. J Inherit Metab Dis 1997; 20:517-24. [PMID: 9266387 DOI: 10.1023/a:1005397329395] [Citation(s) in RCA: 11] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Ornithine transcarbamylase deficiency shows X-linked inheritance with partial dominant expression in carrier females. We studied a girl with intermittent severe orotic aciduria and mild hyperammonaemia despite apparently normal enzyme activity in the liver. Sequence analysis of all 10 exons of the ornithine transcarbamylase gene revealed a novel A-->G exchange (A502G) in exon 5 which changes His-136 to arginine in the ornithine transcarbamylase protein. Km values for carbamyl phosphate and ornithine determined in the patient's liver were comparable to those of wild-type enzyme but, unlike the wild-type enzyme, the mutant enzyme was unstable upon freezing and thawing. Electron microscopy revealed several giant mitochondria with paracrystalline inclusions. The results are compatible with the assumption that the mutant enzyme cannot form a functional complex with carbamyl phosphate synthetase and the ornithine carrier, resulting in decreased availability of substrates and diminished enzyme activity in vivo.
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Affiliation(s)
- S Vella
- Children's Hospital Wildermeth, Biel, Switzerland
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Schwartz JD, Shamamian P, Grossi EA, Schwartz DS, Marcus SG, Steiner F, Jacobs CE, Tayyarah M, Eng K, Colvin SB, Galloway AC. Lexipafant inhibits platelet activating factor enhanced neutrophil functions. J Surg Res 1997; 69:240-8. [PMID: 9224389 DOI: 10.1006/jsre.1997.5008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 02/04/2023]
Abstract
Platelet activating factor (PAF) enhances polymorphonuclear leukocyte (PMN) superoxide (.O2-) production, CD11b expression, and elastase release, all essential components in the pathophysiology of multiple-organ failure. This study was designed to determine the effects of Lexipafant, a PAF receptor antagonist, on PAF-mediated PMN functions. PMNs from 10 healthy volunteers were isolated and pretreated with various concentrations of Lexipafant (0-100 microM). PMNs were then incubated for 5 min with 200 nM PAF for .O2- detection or 2000 nM PAF for elastase measurement and activated with 1 microM N-formylmethionylleucylphenylalanine. The mean rate of .O2- production was determined by a cytochrome c reduction assay (nmole .O2-/min/1.33 x 10(5) PMN +/- SEM). Elastase release was measured by the cleavage of the synthetic elastase substrate Meo-Suc-Ala-Ala-Pro-Val-pNA (mean elastolytic activity +/- SEM). In parallel experiments, PMNs were incubated with 200 nM PAF for 30 min following pre-treatment with Lexipafant and CD11b expression was determined by flow cytometry (mean fluorescence intensity +/- SEM). Statistical analysis was performed using repeated-measures ANOVA (P < 0.05). Lexipafant inhibited PAF-enhanced PMN .O2- generation, CD11b expression and elastase release in a dose dependent fashion. The IC50 of Lexipafant for .O2- production, CD11b expression, and elastase release was 0.046, 0.285, and 0.05 microM, respectively. Lexipafant attenuated the PAF-mediated upregulation of PMN .O2- production, CD11b expression, and elastase release in a dose dependent fashion. These data support the hypothesis that Lexipafant may reduce the severity of the inflammatory response to injury produced by PAF-enhanced activation of PMNs.
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Affiliation(s)
- J D Schwartz
- New York University School of Medicine, Department of Surgery, S. Arthur Localio, Surgical Research Laboratory, New York 10016, USA
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Obermann WM, Gautel M, Steiner F, van der Ven PF, Weber K, Fürst DO. The structure of the sarcomeric M band: localization of defined domains of myomesin, M-protein, and the 250-kD carboxy-terminal region of titin by immunoelectron microscopy. J Biophys Biochem Cytol 1996; 134:1441-53. [PMID: 8830773 PMCID: PMC2121001 DOI: 10.1083/jcb.134.6.1441] [Citation(s) in RCA: 165] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The M band of vertebrate cross-striated myofibrils has remained an enigmatic structure. In addition to myosin thick filaments, two major structural proteins, myomesin and M-protein, have been localized to the M band. Also, titin is expected to be anchored in this structure. To begin to understand the molecular layout of these three proteins, a panel of 16 polyclonal and monoclonal antibodies directed against unique epitopes of defined sequence was assembled, and immunoelectron microscopy was used to locate the position of the epitopes at the sarcomere level. The results allow the localization and orientation of defined domains of titin, myomesin, and M-protein at high resolution. The 250-kD carboxy-terminal region of titin clearly enters the M band with the kinase domain situated approximately 52 nm from the central M1-line. The positions of three additional epitopes are compatible with the view that the titin molecule reaches approximately 60 nm into the opposite sarcomere half. Myomesin also seems to bridge the central M1-line and is oriented parallel to the long axis of the myofibril. The neighboring molecules are oriented in an antiparallel and staggered fashion. The amino-terminal portion of the protein, known to contain a myosin binding site, seems to adopt a specific three-dimensional arrangement. While myomesin is present in both slow and fast fibers, M-protein is restricted to fast fibers. It appears to be organized in a fundamentally different manner: the central portion of the polypeptide is around the M1-line, while the terminal epitopes seem to be arranged along thick filaments. This orientation fits the conspicuously stronger M1-lines in fast twitch fibers. Obvious implications of this model are discussed.
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Affiliation(s)
- W M Obermann
- Max-Planck-Institute for Biophysical Chemistry, Department of Biochemistry, Göttingen, Germany
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Rimensberger PC, Burek-Kozlowska A, Morell A, Germann D, Eigenmann AK, Steiner F, Burger R, Kuenzli M, Schaad UB. Aerosolized immunoglobulin treatment of respiratory syncytial virus infection in infants. Pediatr Infect Dis J 1996; 15:209-16. [PMID: 8852908 DOI: 10.1097/00006454-199603000-00007] [Citation(s) in RCA: 35] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
BACKGROUND Recent studies in animals with experimental respiratory syncytial virus (RSV) infection indicate that passive immunization by intranasal or intratracheal application of gamma-globulins (immunoglobulins) may be beneficial for treatment of infants with lower respiratory tract infection caused by RSV. METHODS We conducted a placebo-controlled, randomized multicenter study involving 68 infants with proven RSV infection admitted to 5 pediatric centers in Switzerland from November 1, 1992, through April 30, 1993. Treatment was carried out with aerosolized human IgG (Sandoglobulin) by assisted ventilation. On the day of hospital admission a single dose of 0.1 g of IgG per kg of body weight in a 5% solution or an identical amount of placebo, each delivered in 2 parts, was given. RESULTS The two groups did not differ substantially in their response to the aerosol received. The rate of improvement for symptoms of respiratory tract infection, oxygen requirement and length of hospital stay were comparable for both groups. There was a significant reduction (P < 0.05) in the frequency of apneic spells observed in the treatment group by Day 3 posttreatment. Aerosol therapy was generally well-tolerated in nonintubated infants, but some severe side effects (increased oxygen requirements in two patients, pneumothorax in one patient) were observed in two of three intubated and ventilated infants treated with IgG. CONCLUSIONS Aerosolized immunoglobulin in the dosage used had no substantial beneficial effect on RSV bronchiolitis. Despite these findings passive immunotherapy for treatment of RSV-induced lower respiratory tract infection deserves further evaluation before being discarded as ineffective.
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Affiliation(s)
- P C Rimensberger
- Department of Pediatrics (Inselspital), University of Berne, Switzerland
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Bäcker A, Steiner F, Stifter P. Spectral statistics in the quantized cardioid billiard. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1995; 52:2463-2472. [PMID: 9963689 DOI: 10.1103/physreve.52.2463] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Aurich R, Hesse T, Steiner F. Role of nonperiodic orbits in the semiclassical quantization of the truncated hyperbola billiard. Phys Rev Lett 1995; 74:4408-4411. [PMID: 10058499 DOI: 10.1103/physrevlett.74.4408] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Aurich R, Scheffler F, Steiner F. Subtleties of arithmetical quantum chaos. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1995; 51:4173-4189. [PMID: 9963129 DOI: 10.1103/physreve.51.4173] [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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Abstract
The murine arylsulfatase A (ARSA) gene and cDNA have been cloned and sequenced. The gene is 3.8 kb long and contains eight exons. All intron/exon splice junctions conform to the GT/AG consensus sequence. The genomic structure is similar to that of the human gene. One major RNA species of 3.2 kb is transcribed. This RNA species has a 5' untranslated region of 638 nucleotides and terminates in a region around nucleotide 700 downstream of the termination codon. In addition, a rare mRNA species terminating at a polyadenylation signal 135 nucleotides downstream of the termination codon has been found. A larger transcript of 4 kb can be detected in liver. The size difference is due to initiation of transcription 5' of the cap site of the 3.2-kb mRNA species. The entire ARSA cDNA has been cloned by PCR from reverse-transcribed RNA. The coding sequence has 1518 nucleotides and predicts a protein of 506 amino acids. The nucleotide as well as the amino acid sequence is highly conserved among humans and mice.
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Affiliation(s)
- J Kreysing
- Department of Biochemistry II, Georg August Universität Göttingen, Federal Republic of Germany
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Kemp AW, Steiner F. The Most Frequent Value: Introduction to a Modern Conception of Statistics. Biometrics 1993. [DOI: 10.2307/2532629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bolte J, Steil G, Steiner F. Arithmetical chaos and violation of universality in energy level statistics. Phys Rev Lett 1992; 69:2188-2191. [PMID: 10046421 DOI: 10.1103/physrevlett.69.2188] [Citation(s) in RCA: 8] [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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Aurich R, Steiner F. Asymptotic distribution of the pseudo-orbits and the generalized Euler constant gamma Delta for a family of strongly chaotic systems. Phys Rev A 1992; 46:771-781. [PMID: 9908177 DOI: 10.1103/physreva.46.771] [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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Witty LA, Steiner F, Curfman M, Webb D, Wheat LJ. Disseminated histoplasmosis in patients receiving low-dose methotrexate therapy for psoriasis. Arch Dermatol 1992; 128:91-3. [PMID: 1739293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND Low-dose methotrexate sodium therapy used for nonmalignant disease has been associated with a variety of opportunistic infections with pathogens occurring in patients with defective cellular immunity. This article describes the unusual development of disseminated histoplasmosis as a probable complication of immunosuppression resulting from use of methotrexate. OBSERVATIONS We report the cases of three patients in whom disseminated histoplasmosis developed while receiving low-dose methotrexate therapy for psoriasis. Disease manifestations were unusually severe in two of the three patients. All three cases were disseminated, and two cases resulted in illnesses requiring intensive medical treatment. Each patient responded appropriately to antifungal treatment, although one patient has required long-term suppressive treatment because of persistent Histoplasma antigenuria. These cases illustrate the risk for opportunistic fungal infections in patients receiving low-dose methotrexate therapy for nonmalignant diseases. CONCLUSIONS Histoplasma should be added to the list of pathogens to be suspected in patients receiving such therapy.
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Affiliation(s)
- L A Witty
- Department of Epidemiology, Ball Memorial Hospital, Muncie, Ind
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Abstract
A case of accidental battery ingestion by a three-year old boy is reported. The possible complications are local (i.e. necrosis of tissues by leakage of the alkaline electrolyte, by electrical injury or by impaction of the battery) and general (mercury poisoning). Large diameter batteries impacted in the oesophagus need prompt removal. When the battery is located in the stomach, two attitudes are discussed: some authors allow it to progress through the gastrointestinal tract spontaneously under radiological control, others recommend rapid removal by endoscopy or surgery in order to avoid the complications above described.
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