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Magnaterra A, Mitchell R, Angel C, Khong M, McMillian Z, Snyder A, Weimer S. Research Note: Comparison of two methods to measure broiler tibia morphology. Poult Sci 2022; 102:102245. [PMID: 36335739 PMCID: PMC9646973 DOI: 10.1016/j.psj.2022.102245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 10/03/2022] [Accepted: 10/08/2022] [Indexed: 11/06/2022] Open
Abstract
The skeletal integrity of chickens is an important area of research and detailed measures are needed to better understand the influence of experimental manipulation on bone health. The objective of this experiment was to compare 2 methods to measure the superficial tibiotarsus (tibia) morphology of broiler chickens collected in the wet laboratory (WL) or from digital images (DIG). The length, width at 90%, 75%, 50%, 25%, and 10% of the length, proximal and distal head width, medial, lateral, and distal intercondylar groove depth (ID), and proximal head angle were measured on the right and left tibias collected from broilers in 2 experiments (E1, E2). In both experiments, tibias had a greater width at 90% of the length when measured with the WL method compared with the DIG method (P ≤ 0.04), while tibias measured with the DIG method had a greater length, distal ID, and widths at 10%, 25%, 50%, and 75%, of the length compared with the WL method (P < 0.0001). In E1, tibias measured with the DIG method had a greater medial, lateral, and distal ID compared with the WL method (P ≤ 0.04). In E2, compared with the DIG method, tibias measured with the WL method had a greater distal head width and lateral ID, yet a shallower distal ID (P ≤ 0.03). The use of the DIG method provided more precise measures but, due to the limitations of measures from digital images and the opportunity for more accurate measures to be collected with the WL method, the WL method is recommended to measure the superficial morphology of broiler chickens because it was more accessible and practical.
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Affiliation(s)
- A. Magnaterra
- Department of Animal and Avian Science, University of Maryland, College Park, MD 20742, USA
| | | | - C.R. Angel
- Department of Animal and Avian Science, University of Maryland, College Park, MD 20742, USA
| | - M. Khong
- Department of Animal and Avian Science, University of Maryland, College Park, MD 20742, USA
| | - Z. McMillian
- Department of Animal and Avian Science, University of Maryland, College Park, MD 20742, USA
| | - A. Snyder
- Department of Animal and Avian Science, University of Maryland, College Park, MD 20742, USA
| | - S. Weimer
- Department of Animal and Avian Science, University of Maryland, College Park, MD 20742, USA,Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA,Corresponding author:
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Adachi Y, De Sousa-Coelho AL, Harata I, Aoun C, Weimer S, Shi X, Gonzalez Herrera KN, Takahashi H, Doherty C, Noguchi Y, Goodyear LJ, Haigis MC, Gerszten RE, Patti ME. l-Alanine activates hepatic AMP-activated protein kinase and modulates systemic glucose metabolism. Mol Metab 2018; 17:61-70. [PMID: 30190193 PMCID: PMC6197624 DOI: 10.1016/j.molmet.2018.08.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 08/07/2018] [Indexed: 12/11/2022] Open
Abstract
Objective AMP activated protein kinase (AMPK) is recognized as an important nutrient sensor contributing to regulation of cellular, tissue, and systemic metabolism. We aimed to identify specific amino acids which could modulate AMPK and determine effects on cellular and systemic metabolism. Methods We performed an unbiased amino acid screen to identify activators of AMPK. Detailed analysis of cellular signaling and metabolism was performed in cultured hepatoma cells, and in vivo glucose metabolism and metabolomic patterns were assessed in both chow-fed mice and mice made obese by high-fat diet feeding. Results Alanine acutely activates AMP kinase in both cultured hepatic cells and in liver from mice treated in vivo with Ala. Oral alanine administration improves systemic glucose tolerance in both chow and high fat diet fed mice, with reduced efficacy of Ala in mice with reduced AMPK activity. Our data indicate that Ala activation of AMPK is mediated by intracellular Ala metabolism, which reduces TCA cycle metabolites, increases AMP/ATP ratio, and activates NH3 generation. Conclusions Ala may serve as a distinct amino acid energy sensor, providing a positive signal to activate the beneficial AMPK signaling pathway. Unbiased amino acid screen identified alanine as a unique activator of AMP kinase. Alanine acutely activates AMP kinase in both cultured cells and in vivo. Alanine and NH3 metabolism contribute to regulation of AMP kinase activation. Effects of Ala are reduced in absence of AMP kinase. Oral alanine improves glucose tolerance in vivo in both chow and HFD-fed mice.
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Affiliation(s)
- Yusuke Adachi
- Research Division, Joslin Diabetes Center, and Harvard Medical School, Boston, MA, USA; Institute for Innovation, Ajinomoto Co. Inc., Japan
| | | | - Ikue Harata
- Institute for Innovation, Ajinomoto Co. Inc., Japan
| | - Charlie Aoun
- Research Division, Joslin Diabetes Center, and Harvard Medical School, Boston, MA, USA
| | - Sandra Weimer
- Research Division, Joslin Diabetes Center, and Harvard Medical School, Boston, MA, USA
| | - Xu Shi
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Karina N Gonzalez Herrera
- Department of Cell Biology and Paul F. Glenn Laboratories for the Biological Mechanisms of Aging, Harvard Medical School, Boston, MA, USA
| | - Hirokazu Takahashi
- Research Division, Joslin Diabetes Center, and Harvard Medical School, Boston, MA, USA
| | - Chris Doherty
- Research Division, Joslin Diabetes Center, and Harvard Medical School, Boston, MA, USA
| | | | - Laurie J Goodyear
- Research Division, Joslin Diabetes Center, and Harvard Medical School, Boston, MA, USA
| | - Marcia C Haigis
- Department of Cell Biology and Paul F. Glenn Laboratories for the Biological Mechanisms of Aging, Harvard Medical School, Boston, MA, USA
| | - Robert E Gerszten
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Mary-Elizabeth Patti
- Research Division, Joslin Diabetes Center, and Harvard Medical School, Boston, MA, USA.
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Lorch C, Novák J, Banerjee R, Weimer S, Dieterle J, Frank C, Hinderhofer A, Gerlach A, Carla F, Schreiber F. Influence of C60 co-deposition on the growth kinetics of diindenoperylene–From rapid roughening to layer-by-layer growth in blended organic films. J Chem Phys 2017; 146:052807. [DOI: 10.1063/1.4966583] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Affiliation(s)
- C. Lorch
- Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
| | - J. Novák
- Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
- Central European Institute of Technology, Masaryk University, Kamenice 5, CZ-62500 Brno, Czech Republic
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlarska 2, CZ-611 37 Brno, Czech Republic
| | - R. Banerjee
- Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
- Department of Physics, Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar 382355, India
| | - S. Weimer
- Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
| | - J. Dieterle
- Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
| | - C. Frank
- Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
| | - A. Hinderhofer
- Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
| | - A. Gerlach
- Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
| | - F. Carla
- ESRF-The European Synchrotron, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - F. Schreiber
- Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen, Germany
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Pivovarova O, Hornemann S, Weimer S, Lu Y, Murahovschi V, Zhuk S, Seltmann AC, Malashicheva A, Kostareva A, Kruse M, Busjahn A, Rudovich N, Pfeiffer AFH. Regulation of nutrition-associated receptors in blood monocytes of normal weight and obese humans. Peptides 2015; 65:12-9. [PMID: 25620618 DOI: 10.1016/j.peptides.2014.11.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Revised: 11/14/2014] [Accepted: 11/19/2014] [Indexed: 12/14/2022]
Abstract
Obesity, type 2 diabetes and associated metabolic diseases are characterized by low-grade systemic inflammation which involves interplay of nutrition and monocyte/macrophage functions. We suggested that some factors such as nutrient components, neuropeptides involved in the control of gastrointestinal functions, and gastrointestinal hormones might influence immune cell functions and in this way contribute to the disease pathogenesis. The aim of this study was to investigate the mRNA expression of twelve nutrition-associated receptors in peripheral blood mononuclear cells (PBMC), isolated monocytes and monocyte-derived macrophages and their regulation under the switching from the high-carbohydrate low-fat diet to the low-carbohydrate high-fat (LC/HFD) isocaloric diet in healthy humans. The mRNA expression of receptors for short chain fatty acids (GPR41, GPR43), bile acids (TGR5), incretins (GIPR, GLP1R), cholecystokinin (CCKAR), neuropeptides VIP and PACAP (VIPR1, VIPR2), and neurotensin (NTSR1) was detected in PBMC and monocytes, while GPR41, GPR43, GIPR, TGR5, and VIPR1 were found in macrophages. Correlations of the receptor expression in monocytes with a range of metabolic and inflammatory markers were found. In non-obese subjects, the dietary switch to LC/HFD induced the increase of GPR43 and VIPR1 expression in monocytes. No significant differences of receptor expression between normal weight and moderately obese subjects were found. Our study characterized for the first time the expression pattern of nutrition-associated receptors in human blood monocytes and its dietary-induced changes linking metabolic responses to nutrition with immune functions in health and metabolic diseases.
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Affiliation(s)
- Olga Pivovarova
- Department of Clinical Nutrition, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; Department of Endocrinology, Diabetes and Nutrition, Campus Benjamin Franklin, Charité University Medicine, Berlin, Germany.
| | - Silke Hornemann
- Department of Clinical Nutrition, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
| | - Sandra Weimer
- Department of Clinical Nutrition, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
| | - Ye Lu
- Department of Clinical Nutrition, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; Department of Endocrinology, Diabetes and Nutrition, Campus Benjamin Franklin, Charité University Medicine, Berlin, Germany
| | - Veronica Murahovschi
- Department of Clinical Nutrition, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; Department of Endocrinology, Diabetes and Nutrition, Campus Benjamin Franklin, Charité University Medicine, Berlin, Germany
| | - Sergei Zhuk
- Almazov Federal Medical Research Centre, Saint-Petersburg, Russian Federation
| | - Anne-Cathrin Seltmann
- Department of Clinical Nutrition, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
| | - Anna Malashicheva
- Almazov Federal Medical Research Centre, Saint-Petersburg, Russian Federation
| | - Anna Kostareva
- Almazov Federal Medical Research Centre, Saint-Petersburg, Russian Federation
| | - Michael Kruse
- Department of Clinical Nutrition, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; Department of Endocrinology, Diabetes and Nutrition, Campus Benjamin Franklin, Charité University Medicine, Berlin, Germany
| | | | - Natalia Rudovich
- Department of Clinical Nutrition, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; Department of Endocrinology, Diabetes and Nutrition, Campus Benjamin Franklin, Charité University Medicine, Berlin, Germany
| | - Andreas F H Pfeiffer
- Department of Clinical Nutrition, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; Department of Endocrinology, Diabetes and Nutrition, Campus Benjamin Franklin, Charité University Medicine, Berlin, Germany
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Weimer S, Priebs J, Kuhlow D, Groth M, Priebe S, Mansfeld J, Merry TL, Dubuis S, Laube B, Pfeiffer AF, Schulz TJ, Guthke R, Platzer M, Zamboni N, Zarse K, Ristow M. D-Glucosamine supplementation extends life span of nematodes and of ageing mice. Nat Commun 2014; 5:3563. [PMID: 24714520 PMCID: PMC3988823 DOI: 10.1038/ncomms4563] [Citation(s) in RCA: 154] [Impact Index Per Article: 15.4] [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: 01/06/2014] [Accepted: 03/05/2014] [Indexed: 12/28/2022] Open
Abstract
D-Glucosamine (GlcN) is a freely available and commonly used dietary supplement potentially promoting cartilage health in humans, which also acts as an inhibitor of glycolysis. Here we show that GlcN, independent of the hexosamine pathway, extends Caenorhabditis elegans life span by impairing glucose metabolism that activates AMP-activated protein kinase (AMPK/AAK-2) and increases mitochondrial biogenesis. Consistent with the concept of mitohormesis, GlcN promotes increased formation of mitochondrial reactive oxygen species (ROS) culminating in increased expression of the nematodal amino acid-transporter 1 (aat-1) gene. Ameliorating mitochondrial ROS formation or impairment of aat-1-expression abolishes GlcN-mediated life span extension in an NRF2/SKN-1-dependent fashion. Unlike other calorie restriction mimetics, such as 2-deoxyglucose, GlcN extends life span of ageing C57BL/6 mice, which show an induction of mitochondrial biogenesis, lowered blood glucose levels, enhanced expression of several murine amino-acid transporters, as well as increased amino-acid catabolism. Taken together, we provide evidence that GlcN extends life span in evolutionary distinct species by mimicking a low-carbohydrate diet.
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Affiliation(s)
- Sandra Weimer
- Energy Metabolism Laboratory, ETH Zürich (Swiss Federal Institute of Technology Zurich), Zürich CH-8603, Switzerland
- German Institute of Human Nutrition Potsdam-Rehbrücke, D-14558 Nuthetal, Germany
- These authors contributed equally to the work
| | - Josephine Priebs
- Department of Human Nutrition, Institute of Nutrition, University of Jena, D-07743 Jena, Germany
- These authors contributed equally to the work
| | - Doreen Kuhlow
- German Institute of Human Nutrition Potsdam-Rehbrücke, D-14558 Nuthetal, Germany
- Department of Human Nutrition, Institute of Nutrition, University of Jena, D-07743 Jena, Germany
| | - Marco Groth
- Genome Analysis Group, Leibniz Institute for Age Research, Fritz-Lipmann-Institute, D-07745 Jena, Germany
| | - Steffen Priebe
- Systems Biology and Bioinformatics Group, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, D-07745 Jena, Germany
| | - Johannes Mansfeld
- Energy Metabolism Laboratory, ETH Zürich (Swiss Federal Institute of Technology Zurich), Zürich CH-8603, Switzerland
- Department of Human Nutrition, Institute of Nutrition, University of Jena, D-07743 Jena, Germany
- DFG Graduate School of Adaptive Stress Response #1715, D-07745 Jena, Germany
| | - Troy L. Merry
- Energy Metabolism Laboratory, ETH Zürich (Swiss Federal Institute of Technology Zurich), Zürich CH-8603, Switzerland
| | - Sébastien Dubuis
- Institute of Molecular Systems Biology, ETH Zürich (Swiss Federal Institute of Technology Zurich), Zürich CH-8093, Switzerland
| | - Beate Laube
- Energy Metabolism Laboratory, ETH Zürich (Swiss Federal Institute of Technology Zurich), Zürich CH-8603, Switzerland
- Department of Human Nutrition, Institute of Nutrition, University of Jena, D-07743 Jena, Germany
| | - Andreas F. Pfeiffer
- German Institute of Human Nutrition Potsdam-Rehbrücke, D-14558 Nuthetal, Germany
| | - Tim J. Schulz
- German Institute of Human Nutrition Potsdam-Rehbrücke, D-14558 Nuthetal, Germany
| | - Reinhard Guthke
- Systems Biology and Bioinformatics Group, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, D-07745 Jena, Germany
| | - Matthias Platzer
- Genome Analysis Group, Leibniz Institute for Age Research, Fritz-Lipmann-Institute, D-07745 Jena, Germany
| | - Nicola Zamboni
- Institute of Molecular Systems Biology, ETH Zürich (Swiss Federal Institute of Technology Zurich), Zürich CH-8093, Switzerland
| | - Kim Zarse
- Energy Metabolism Laboratory, ETH Zürich (Swiss Federal Institute of Technology Zurich), Zürich CH-8603, Switzerland
- Department of Human Nutrition, Institute of Nutrition, University of Jena, D-07743 Jena, Germany
| | - Michael Ristow
- Energy Metabolism Laboratory, ETH Zürich (Swiss Federal Institute of Technology Zurich), Zürich CH-8603, Switzerland
- German Institute of Human Nutrition Potsdam-Rehbrücke, D-14558 Nuthetal, Germany
- Department of Human Nutrition, Institute of Nutrition, University of Jena, D-07743 Jena, Germany
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Schmeisser S, Schmeisser K, Weimer S, Groth M, Priebe S, Fazius E, Kuhlow D, Pick D, Einax JW, Guthke R, Platzer M, Zarse K, Ristow M. Mitochondrial hormesis links low-dose arsenite exposure to lifespan extension. Aging Cell 2013; 12:508-17. [PMID: 23534459 PMCID: PMC3709120 DOI: 10.1111/acel.12076] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [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] [Accepted: 03/16/2013] [Indexed: 11/30/2022] Open
Abstract
Arsenite is one of the most toxic chemical substances known and is assumed to exert detrimental effects on viability even at lowest concentrations. By contrast and unlike higher concentrations, we here find that exposure to low-dose arsenite promotes growth of cultured mammalian cells. In the nematode C. elegans, low-dose arsenite promotes resistance against thermal and chemical stressors and extends lifespan of this metazoan, whereas higher concentrations reduce longevity. While arsenite causes a transient increase in reactive oxygen species (ROS) levels in C. elegans, co-exposure to ROS scavengers prevents the lifespan-extending capabilities of arsenite, indicating that transiently increased ROS levels act as transducers of arsenite effects on lifespan, a process known as mitohormesis. This requires two transcription factors, namely DAF-16 and SKN-1, which employ the metallothionein MTL-2 as well as the mitochondrial transporter TIN-9.1 to extend lifespan. Taken together, low-dose arsenite extends lifespan, providing evidence for nonlinear dose-response characteristics of toxin-mediated stress resistance and longevity in a multicellular organism.
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Affiliation(s)
- Sebastian Schmeisser
- Department of Human Nutrition Institute of Nutrition University of Jena D‐07743Jena Germany
- Leibniz Graduate School of Aging Leibniz Institute for Age Research Fritz‐Lipmann‐Institute D‐07745Jena Germany
| | - Kathrin Schmeisser
- Department of Human Nutrition Institute of Nutrition University of Jena D‐07743Jena Germany
| | - Sandra Weimer
- Department of Clinical Nutrition German Institute of Human Nutrition Potsdam‐Rehbrücke D‐14558Nuthetal Germany
- Energy Metabolism Laboratory Swiss Federal Institute of Technology (ETH) Zurich Schwerzenbach/Zürich CH 8603Switzerland
| | - Marco Groth
- Genome Analysis Group Leibniz Institute for Age Research Fritz‐Lipmann‐Institute D‐07745Jena Germany
| | - Steffen Priebe
- Systems Biology and Bioinformatics Group Leibniz Institute for Natural Product Research and Infection Biology Hans‐Knöll‐Institute D‐07745 Jena Germany
| | - Eugen Fazius
- Systems Biology and Bioinformatics Group Leibniz Institute for Natural Product Research and Infection Biology Hans‐Knöll‐Institute D‐07745 Jena Germany
| | - Doreen Kuhlow
- Department of Human Nutrition Institute of Nutrition University of Jena D‐07743Jena Germany
- Department of Clinical Nutrition German Institute of Human Nutrition Potsdam‐Rehbrücke D‐14558Nuthetal Germany
| | - Denis Pick
- Department of Environmental Analysis Institute of Inorganic and Analytical Chemistry University of Jena D‐07743Jena Germany
| | - Jürgen W. Einax
- Department of Environmental Analysis Institute of Inorganic and Analytical Chemistry University of Jena D‐07743Jena Germany
| | - Reinhard Guthke
- Systems Biology and Bioinformatics Group Leibniz Institute for Natural Product Research and Infection Biology Hans‐Knöll‐Institute D‐07745 Jena Germany
| | - Matthias Platzer
- Genome Analysis Group Leibniz Institute for Age Research Fritz‐Lipmann‐Institute D‐07745Jena Germany
| | - Kim Zarse
- Department of Human Nutrition Institute of Nutrition University of Jena D‐07743Jena Germany
- Energy Metabolism Laboratory Swiss Federal Institute of Technology (ETH) Zurich Schwerzenbach/Zürich CH 8603Switzerland
| | - Michael Ristow
- Department of Human Nutrition Institute of Nutrition University of Jena D‐07743Jena Germany
- Department of Clinical Nutrition German Institute of Human Nutrition Potsdam‐Rehbrücke D‐14558Nuthetal Germany
- Energy Metabolism Laboratory Swiss Federal Institute of Technology (ETH) Zurich Schwerzenbach/Zürich CH 8603Switzerland
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O'Toole A, Phillips J, Dunlop J, An X, Weimer S, Natu V. Identifying faces across large changes in illumination: Human versus machine performance. J Vis 2011. [DOI: 10.1167/11.11.595] [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: 11/24/2022] Open
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O'Toole A, Weimer S, Dunlop J, Barwick R, Ayyad J, Phillips J. Recognizing people from dynamic video: Dissecting identity information with a fusion approach. J Vis 2010. [DOI: 10.1167/10.7.643] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Raboy D, Sekunova A, Scheel M, Natu V, Weimer S, Duchaine B, Barton J, O'Toole A. Recognition of static versus dynamic faces in prosopagnosia. J Vis 2010. [DOI: 10.1167/10.7.594] [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: 11/24/2022] Open
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Jimenez JL, Canagaratna MR, Donahue NM, Prevot ASH, Zhang Q, Kroll JH, DeCarlo PF, Allan JD, Coe H, Ng NL, Aiken AC, Docherty KS, Ulbrich IM, Grieshop AP, Robinson AL, Duplissy J, Smith JD, Wilson KR, Lanz VA, Hueglin C, Sun YL, Tian J, Laaksonen A, Raatikainen T, Rautiainen J, Vaattovaara P, Ehn M, Kulmala M, Tomlinson JM, Collins DR, Cubison MJ, Dunlea EJ, Huffman JA, Onasch TB, Alfarra MR, Williams PI, Bower K, Kondo Y, Schneider J, Drewnick F, Borrmann S, Weimer S, Demerjian K, Salcedo D, Cottrell L, Griffin R, Takami A, Miyoshi T, Hatakeyama S, Shimono A, Sun JY, Zhang YM, Dzepina K, Kimmel JR, Sueper D, Jayne JT, Herndon SC, Trimborn AM, Williams LR, Wood EC, Middlebrook AM, Kolb CE, Baltensperger U, Worsnop DR. Evolution of Organic Aerosols in the Atmosphere. Science 2009; 326:1525-9. [PMID: 20007897 DOI: 10.1126/science.1180353] [Citation(s) in RCA: 1053] [Impact Index Per Article: 70.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- J L Jimenez
- Cooperative Institute for Research in the Environmental Sciences and Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA.
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Weimer S, Alfarra MR, Schreiber D, Mohr M, Prévôt ASH, Baltensperger U. Organic aerosol mass spectral signatures from wood-burning emissions: Influence of burning conditions and wood type. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd009309] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Schneider J, Hock N, Weimer S, Borrmann S, Kirchner U, Vogt R, Scheer V. Nucleation particles in diesel exhaust: composition inferred from in situ mass spectrometric analysis. Environ Sci Technol 2005; 39:6153-61. [PMID: 16173576 DOI: 10.1021/es049427m] [Citation(s) in RCA: 17] [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] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Mass spectrometric measurements of size and composition of diesel exhaust particles have been performed under various conditions: chassis dynamometer tests, field measurements near a German motorway, and individual car chasing. Nucleation particles consisting of volatile sulfate and organic material could be detected both at the chassis dynamometer test facility and during individual car chasing. We found evidence that if nucleation occurs, sulfuric acid/water is the nucleating agent. Low-volatile organics species condense only on the preexisting sulfuric acid/water clusters. Nucleation was found to depend strongly on various parameters such as exhaust dilution conditions, fuel sulfur content, and engine load. The latter determines the fraction of the fuel sulfur that is converted to sulfuric acid. The organic compounds (volatile and low-volatile) condense only on preexisting particles, such as both sulfuric acid nucleation particles and larger accumulation mode soot particles. On the latter, sulfuric acid also condenses, if the conditions for nucleation are not given. The overall ratio of sulfate to organic (volatile and low-volatile) is also strongly dependent on the engine load. It was found that the production of nucleation particles even at high engine load can be suppressed by using low-sulfur fuel.
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Affiliation(s)
- J Schneider
- Cloud Physics and Chemistry Department, Max Planck Institute for Chemistry, Johannes Gutenberg University, Mainz, Germany.
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Moon TD, Laurens M, Levy JA, Weimer S. 313 REASONS FOR SEEKING NON-EMERGENT MEDICAL CARE AT AN URBAN PEDIATRIC EMERGENCY ROOM (PER) VERSUS A PRIMARY PEDIATRICIAN. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-866] [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: 11/04/2022]
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Weimer S, Schmidt N, Potemkina O. [Environmental air benzene levels in different districts of Tallin]. Gig Sanit 2001:72-4. [PMID: 11530651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
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Weimer S. Dolphins and a path of healing. Beginnings 1999; 19:10-1. [PMID: 10690032] [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] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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Weimer S. Dolphins and a path of healing. Pulse 1999; 36:20. [PMID: 10614474] [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] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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Weimer S. Akathisia in a cancer patient treated with antiemetics. Am J Psychiatry 1995; 152:960-1. [PMID: 7755144 DOI: 10.1176/ajp.152.6.960b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Friedmann P, Weimer S, Naegele G. [Determinants of the decision to retire. A contribution to the discussion on the "flexible retirement age limit" (author's transl)]. Aktuelle Gerontol 1980; 10:413-7. [PMID: 6110379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Our research intended to analyse the effects of the "Flexible Altersgrenze" (introduced in 1973) on the position of older workers. The study was designed as a casestudy in three firms of different branches of industry. We found out that all older workers planned to make use of the "Flexible Altersgrenze" in as far as their income and insurance claims permitted it. Under this scheme the retirement age would still be higher than most of the workers would prefer. The following stipulations infludenced the decision to retire: -- the state of physical health -- the strain of working-conditions in their present job and throughout their working-life -- a pessimistic view of their job prospects at that age -- unfavourable experiences with the effects of technical and organisational change in working-conditions -- the necessity of changing the job in later life because of the incapability to bear its strain.
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