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Manninen S, Tilles-Tirkkonen T, Aittola K, Männikkö R, Karhunen L, Kolehmainen M, Schwab U, Lindström J, Lakka T, Pihlajamäki J. Associations of Lifestyle Patterns with Glucose and Lipid Metabolism in Finnish Adults at Increased Risk of Type 2 Diabetes. Mol Nutr Food Res 2024; 68:e2300338. [PMID: 38308150 DOI: 10.1002/mnfr.202300338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 10/18/2023] [Indexed: 02/04/2024]
Abstract
SCOPE Various lifestyle and sociodemographic factors have been associated with risk factors for type 2 diabetes (T2D). However, their combined associations with T2D risk factors have been studied much less. MATERIALS AND RESULTS This study investigates cross-sectional associations of lifestyle patterns with T2D risk factors among 2925 adults at increased risk participating in the Stop Diabetes study. Lifestyle patterns are determined using principal component analysis (PCA) with several lifestyle and sociodemographic factors. The associations of lifestyle patterns with measures of glucose and lipid metabolism and serum metabolites analyzed by nuclear magnetic resonance (NMR) spectroscopy are studied using linear regression analysis. "Healthy eating" pattern is associated with better glucose and insulin metabolism, more favorable lipoprotein and fatty acid profiles and lower serum concentrations of metabolites related to inflammation, insulin resistance, and T2D. "High socioeconomic status and low physical activity" pattern is associated with increased serum concentrations of branched-chain amino acids, as are "Meat and poultry" and "Sleeping hours" patterns. "Snacks" pattern is associated with lower serum concentrations of ketone bodies. CONCLUSIONS Our results show, in large scale primary care setting, that healthy eating is associated with better glucose and lipid metabolism and reveal novel associations of lifestyle patterns with metabolites related to glucose metabolism.
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Affiliation(s)
- Suvi Manninen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, 70211, Finland
| | - Tanja Tilles-Tirkkonen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, 70211, Finland
| | - Kirsikka Aittola
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, 70211, Finland
| | - Reija Männikkö
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, 70211, Finland
| | - Leila Karhunen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, 70211, Finland
| | - Marjukka Kolehmainen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, 70211, Finland
| | - Ursula Schwab
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, 70211, Finland
- Department of Medicine, Endocrinology and Clinical Nutrition, Kuopio University Hospital, Kuopio, KYS, 70029, Finland
| | - Jaana Lindström
- Department of Public Health and Welfare, Finnish Institute for Health and Welfare, Helsinki, 00271, Finland
| | - Timo Lakka
- Institute of Biomedicine, School of Medicine, University of Eastern Finland, Kuopio, 70211, Finland
- Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital, Kuopio, KYS, 70029, Finland
- Foundation for Research in Health Exercise and Nutrition, Kuopio Research Institute of Exercise Medicine, Kuopio, 70100, Finland
| | - Jussi Pihlajamäki
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, 70211, Finland
- Department of Medicine, Endocrinology and Clinical Nutrition, Kuopio University Hospital, Kuopio, KYS, 70029, Finland
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Lyytinen AT, Yesmean M, Manninen S, Lankinen M, Bhalke M, Fredrikson L, Käkelä RT, Öörni K, Schwab US. Fatty fish consumption reduces lipophilic index in erythrocyte membranes and serum phospholipids. Nutr Metab Cardiovasc Dis 2023; 33:1453-1460. [PMID: 37156666 DOI: 10.1016/j.numecd.2023.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 03/31/2023] [Accepted: 04/14/2023] [Indexed: 05/10/2023]
Abstract
BACKGROUND AND AIMS Lipophilic index (LI) has been introduced to assess the overall fatty acid lipophilicity and as a simple estimate of membrane fluidity. However, little is known on effect of diet on LI. We tested if Camelina sativa oil (CSO) high in ALA, fatty fish (FF) or lean fish (LF) affect LI as compared to control diet and, secondarily, if the LI is associated with HDL lipids and functionality and LDL lipidome. METHODS AND RESULTS We used data from two randomized clinical trials. The AlfaFish intervention lasted 12 weeks and 79 subjects with impaired glucose tolerance were randomized to FF, LF, CSO or control group. In the Fish trial, 33 subjects with myocardial infarction or unstable ischemic heart attack were randomized to FF, LF or control group for 8 weeks. LI was calculated from erythrocyte membrane fatty acids in AlfaFish and from serum phospholipids in Fish trial. HDL lipids were measured using high-throughput proton nuclear magnetic resonance spectroscopy. There was a significant decrease in LI in the FF group in the AlfaFish (fold change 0.98 ± 0.03) and in the Fish trial (0.95 ± 0.04) and the decrease differed from that of control group in both trials and from CSO group in the AlfaFish study. There were no significant changes in LI in LF or CSO groups. The mean diameter of HDL particles and concentration of large HDL particles were inversely associated with LI. CONCLUSION FF consumption decreased LI indicating better membrane fluidity in subjects with impaired glucose tolerance or coronary heart disease.
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Affiliation(s)
- Arja T Lyytinen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland.
| | - Monira Yesmean
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Suvi Manninen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Maria Lankinen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Monika Bhalke
- Helsinki University Lipidomics Unit (HiLIPID), Helsinki Institute of Life Science (HiLIFE) and Biocenter Finland, Helsinki, Finland; Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Linda Fredrikson
- Helsinki University Lipidomics Unit (HiLIPID), Helsinki Institute of Life Science (HiLIFE) and Biocenter Finland, Helsinki, Finland; Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Reijo T Käkelä
- Helsinki University Lipidomics Unit (HiLIPID), Helsinki Institute of Life Science (HiLIFE) and Biocenter Finland, Helsinki, Finland; Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Katariina Öörni
- Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland; Atherosclerosis Research Laboratory, Wihuri Research Institute, Helsinki, Finland
| | - Ursula S Schwab
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland; Department of Medicine, Endocrinology and Clinical Nutrition, Kuopio University Hospital, Kuopio, Finland
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Liedes H, Mattila E, Honka A, Absetz P, Aittola K, Manninen S, Lintu N, Schwab U, Eloranta AM, Umer A, Tilles-Tirkkonen T, Männikkö R, Ruotsalainen I, Van Gils M, Lindström J, Lakka T, Pihlajamäki J, Vuorinen AL. Associations Between Engagement with the BitHabit Digital Lifestyle Intervention and Changes in Type 2 Diabetes Risk Factors. Stud Health Technol Inform 2023; 302:1009-1010. [PMID: 37203555 DOI: 10.3233/shti230328] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Type 2 diabetes (T2D) can be prevented or delayed through a healthy lifestyle. Digital behavior change interventions (DBCIs) may offer cost-effective and scalable means to support lifestyle changes. This study investigated associations between user engagement with a habit-formation-based DBCI, the BitHabit app, and changes in T2D risk factors over 12 months in 963 participants at risk of T2D. User engagement was characterized by calculating use metrics from the BitHabit log data. User ratings were used as a subjective measure of engagement. The use metrics and user ratings were the strongest associated with improvements in diet quality. Weak positive associations were observed between the use metrics and changes in waist circumference and body mass index. No associations were found with changes in physical activity, fasting plasma glucose, or plasma glucose two hours after an oral glucose tolerance test. To conclude, increased use of the BitHabit app can have beneficial impacts on T2D risk factors, especially on diet quality.
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Affiliation(s)
- Hilkka Liedes
- VTT Technical Research Centre of Finland Ltd., Finland
| | - Elina Mattila
- VTT Technical Research Centre of Finland Ltd., Finland
| | - Anita Honka
- VTT Technical Research Centre of Finland Ltd., Finland
| | | | | | | | | | - Ursula Schwab
- University of Eastern Finland, Finland
- Kuopio University Hospital, Finland
| | | | - Adil Umer
- VTT Technical Research Centre of Finland Ltd., Finland
| | | | - Reija Männikkö
- University of Eastern Finland, Finland
- Terveystalo Healthcare, Finland
| | | | | | | | - Timo Lakka
- University of Eastern Finland, Finland
- Kuopio University Hospital, Finland
- Kuopio Research Institute of Exercise Medicine, Finland
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Erkkilä AT, Manninen S, Fredrikson L, Bhalke M, Holopainen M, Ruuth M, Lankinen M, Käkelä R, Öörni K, Schwab US. Lipidomic changes of LDL after consumption of Camelina sativa oil, fatty fish and lean fish in subjects with impaired glucose metabolism-A randomized controlled trial. J Clin Lipidol 2021; 15:743-751. [PMID: 34548243 DOI: 10.1016/j.jacl.2021.08.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 08/30/2021] [Accepted: 08/30/2021] [Indexed: 12/18/2022]
Abstract
BACKGROUND There is little knowledge on the effects of alpha-linolenic acid (ALA) and n-3 long-chain polyunsaturated fatty acids (n-3 LCPUFA) on the LDL lipidome and aggregation of LDL particles. OBJECTIVE We examined if consumption of Camelina sativa oil (CSO) as a source of ALA, fatty fish (FF) as a source of n-3 LCPUFA and lean fish (LF) as a source of fish protein affect the lipidome of LDL as compared to a control diet. METHODS Participants with impaired glucose tolerance (39 women and 40 men) were randomized to 4 study groups (CSO providing 10 g/d ALA, FF and LF [both 4 fish meals/wk] and control limiting their fish and ALA intake) in a 12-week, parallel trial. Diets were instructed and dietary fats were provided to the participants. The lipidome of LDL particles isolated from samples collected at baseline and after intervention was analyzed with electrospray ionization-tandem mass spectrometry. RESULTS In the CSO group, the relative concentrations of saturated and monounsaturated cholesteryl ester species in LDL decreased and the species with ALA increased. In the FF group, LDL phosphatidylcholine (PC) species containing n-3 LCPUFA increased. There was a significant positive correlation between the change in total sphingomyelin and change in LDL aggregation, while total PC and triunsaturated PC species were inversely associated with LDL aggregation when all the study participants were included in the analysis. CONCLUSION Dietary intake of CSO and FF modifies the LDL lipidome to contain more polyunsaturated and less saturated lipid species. The LDL surface lipids are associated with LDL aggregation.
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Affiliation(s)
- Arja T Erkkilä
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland.
| | - Suvi Manninen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Linda Fredrikson
- Helsinki University Lipidomics Unit (HiLIPID), Helsinki Institute for Life Sciences (HiLIFE) and Biocenter Finland, University of Helsinki, Helsinki, Finland; Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Monika Bhalke
- Helsinki University Lipidomics Unit (HiLIPID), Helsinki Institute for Life Sciences (HiLIFE) and Biocenter Finland, University of Helsinki, Helsinki, Finland; Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Minna Holopainen
- Helsinki University Lipidomics Unit (HiLIPID), Helsinki Institute for Life Sciences (HiLIFE) and Biocenter Finland, University of Helsinki, Helsinki, Finland; Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Maija Ruuth
- Atherosclerosis Research Laboratory, Wihuri Research Institute, Helsinki, Finland; Research Programs Unit, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Maria Lankinen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Reijo Käkelä
- Helsinki University Lipidomics Unit (HiLIPID), Helsinki Institute for Life Sciences (HiLIFE) and Biocenter Finland, University of Helsinki, Helsinki, Finland; Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Katariina Öörni
- Atherosclerosis Research Laboratory, Wihuri Research Institute, Helsinki, Finland; Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Ursula S Schwab
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland; Department of Medicine, Endocrinology and Clinical Nutrition, Kuopio University Hospital, Kuopio, Finland
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Erkkilä AT, Lee JC, Lankinen M, Manninen S, Leung HH, Oger C, de Mello VD, Schwab US. Camelina sativaOil, Fatty Fish, and Lean Fish Do Not Markedly Affect Urinary Prostanoids in Subjects with Impaired Glucose Metabolism. Lipids 2019; 54:453-464. [DOI: 10.1002/lipd.12176] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 05/28/2019] [Accepted: 05/30/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Arja T. Erkkilä
- Institute of Public Health and Clinical NutritionUniversity of Eastern Finland Yliopistonranta, 70210 Kuopio Finland
| | - Jetty C.‐Y. Lee
- School of Biological SciencesThe University of Hong Kong Pok Fu Lam Road, Hong Kong SAR
| | - Maria Lankinen
- Institute of Public Health and Clinical NutritionUniversity of Eastern Finland Yliopistonranta, 70210 Kuopio Finland
| | - Suvi Manninen
- Institute of Public Health and Clinical NutritionUniversity of Eastern Finland Yliopistonranta, 70210 Kuopio Finland
| | - Ho Hang Leung
- School of Biological SciencesThe University of Hong Kong Pok Fu Lam Road, Hong Kong SAR
| | - Camille Oger
- Institut des Biomolécules Max Mousseron, IBMMUniversité de Montpellier, CNRS, ENSCM Faculté de Pharmacie Av. Charles Flahault BP, 34093 Montpellier Cedex France
| | - Vanessa D. de Mello
- Institute of Public Health and Clinical NutritionUniversity of Eastern Finland Yliopistonranta, 70210 Kuopio Finland
| | - Ursula S. Schwab
- Institute of Public Health and Clinical NutritionUniversity of Eastern Finland Yliopistonranta, 70210 Kuopio Finland
- Department of Medicine, Endocrinology and Clinical NutritionKuopio University Hospital Puijonlaaksontie, 70210 Kuopio Finland
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Manninen S, Lankinen M, de Mello V, Ågren J, Laaksonen D, Schwab U, Erkkilä A. The effect of camelina sativa oil and fish intakes on fatty acid compositions of blood lipid fractions. Nutr Metab Cardiovasc Dis 2019; 29:51-61. [PMID: 30454883 DOI: 10.1016/j.numecd.2018.10.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 04/25/2018] [Revised: 10/01/2018] [Accepted: 10/01/2018] [Indexed: 01/08/2023]
Abstract
BACKGROUND AND AIMS Blood lipid fractions serve as objective biomarkers of dietary fat intake. It is unclear which fatty acid pool most accurately reflects the dietary intakes of different n-3 PUFAs. We aimed to investigate the effect of fish and camelina sativa oil (CSO) intakes on fatty acid composition of erythrocyte membranes (EM), plasma phospholipids (PL), cholesteryl esters (CE) and triglycerides (TG). We also aimed to identify the most appropriate blood lipid fraction for assessing n-3 PUFA intake. METHODS AND RESULTS Altogether 79 volunteers with impaired glucose metabolism were randomly assigned either to CSO, fatty fish, lean fish or control groups for 12 weeks. Fatty acid compositions of lipid pools were measured by gas chromatography. The proportion of alpha-linolenic acid (ALA) increased in all lipid pools in the CSO group (false discovery rate (FDR) p < 0.001 for all). Similarly, the proportions of EPA and DHA increased in all lipid fractions in the fatty fish group (FDR p < 0.001 for EM, PL and CE; FDR p = 0.005 for TG; FDR p < 0.001 for EM, PL, CE; FDR p < 0.007 for TG, respectively). Changes in the dietary intakes of ALA, EPA and DHA correlated with the changes in their proportions in all lipid pools (r = 0.3-0.5, p < 0.05). CONCLUSION There is no difference in the ability of blood lipid fractions in reflecting the dietary intake of different n-3 PUFAs over a time period of 12 weeks in subjects with high baseline omega-3 index. This trial was registered in Clinicaltrials.gov (NCT01768429).
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Affiliation(s)
- S Manninen
- Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland.
| | - M Lankinen
- Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - V de Mello
- Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - J Ågren
- Institute of Biomedicine, Physiology, University of Eastern Finland, Kuopio, Finland
| | - D Laaksonen
- Institute of Biomedicine, Physiology, University of Eastern Finland, Kuopio, Finland; Institute of Clinical medicine, Internal Medicine, Kuopio University Hospital, Kuopio, Finland
| | - U Schwab
- Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland; Institute of Clinical medicine, Internal Medicine, Kuopio University Hospital, Kuopio, Finland
| | - A Erkkilä
- Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
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Manninen S, Lankinen M, Erkkilä A, Nguyen SD, Ruuth M, de Mello V, Öörni K, Schwab U. The effect of intakes of fish and Camelina sativa oil on atherogenic and anti-atherogenic functions of LDL and HDL particles: A randomized controlled trial. Atherosclerosis 2018; 281:56-61. [PMID: 30658192 DOI: 10.1016/j.atherosclerosis.2018.12.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 11/29/2018] [Accepted: 12/13/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND AIMS Omega-3 fatty acids are known to have several cardioprotective effects. Our aim was to investigate the effects of intakes of fish and Camelina sativa oil (CSO), rich in alpha-linolenic acid, on the atherogenic and anti-atherogenic functions of LDL and HDL particles. METHODS Altogether, 88 volunteers with impaired glucose metabolism were randomly assigned to CSO (10 g of alpha-linolenic acid/day), fatty fish (4 fish meals/week), lean fish (4 fish meals/week) or control group for 12 weeks. 79 subjects completed the study. The binding of lipoproteins to aortic proteoglycans, LDL aggregation and activation of endothelial cells by LDL and cholesterol efflux capacity of HDL were determined in vitro. RESULTS Intake of CSO decreased the binding of lipoproteins to aortic proteoglycans in a non-normalized model (p = 0.006). After normalizing with serum concentrations of non-HDL cholesterol, apolipoprotein B (apoB) or LDL cholesterol, which decreased in the CSO group, the change was no longer statistically significant. In the fish groups, there were no changes in the binding of lipoproteins to proteoglycans. Regarding other lipoprotein functions, there were no changes in any of the groups. CONCLUSIONS Intake of CSO decreases the binding of lipoproteins to aortic proteoglycans by decreasing serum LDL cholesterol concentration, which suggests that the level of apoB-containing lipoproteins in the circulation is the main driver of lipoprotein retention within the arterial wall. Intake of fish or CSO has no effects on other lipoprotein functions.
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Affiliation(s)
- Suvi Manninen
- Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland.
| | - Maria Lankinen
- Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Arja Erkkilä
- Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Su Duy Nguyen
- Atherosclerosis Research Laboratory, Wihuri Research Institute, Helsinki, Finland
| | - Maija Ruuth
- Atherosclerosis Research Laboratory, Wihuri Research Institute, Helsinki, Finland; Research Programs Unit, University of Helsinki, Finland
| | - Vanessa de Mello
- Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Katariina Öörni
- Atherosclerosis Research Laboratory, Wihuri Research Institute, Helsinki, Finland
| | - Ursula Schwab
- Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland; Department of Medicine, Endocrinology and Clinical Nutrition, Kuopio University Hospital, Finland
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Manninen S, Kivimäki S, Leith ID, Leeson SR, Sheppard LJ. Nitrogen deposition does not enhance Sphagnum decomposition. Sci Total Environ 2016; 571:314-322. [PMID: 27487447 DOI: 10.1016/j.scitotenv.2016.07.152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 07/21/2016] [Accepted: 07/21/2016] [Indexed: 06/06/2023]
Abstract
Long-term additions of nitrogen (N) to peatlands have altered bryophyte growth, species dominance, N content in peat and peat water, and often resulted in enhanced Sphagnum decomposition rate. However, these results have mainly been derived from experiments in which N was applied as ammonium nitrate (NH4NO3), neglecting the fact that in polluted areas, wet deposition may be dominated either by NO3(-) or NH4(+). We studied effects of elevated wet deposition of NO3(-) vs. NH4(+) alone (8 or 56kgNha(-1)yr(-1) over and above the background of 8kgNha(-1)yr(-1) for 5 to 11years) or combined with phosphorus (P) and potassium (K) on Sphagnum quality for decomposers, mass loss, and associated changes in hummock pore water in an ombrotrophic bog (Whim). Adding N, especially as NH4(+), increased N concentration in Sphagnum, but did not enhance mass loss from Sphagnum. Mass loss seemed to depend mainly on moss species and climatic factors. Only high applications of N affected hummock pore water chemistry, which varied considerably over time. Overall, C and N cycling in this N treated bog appeared to be decoupled. We conclude that moss species, seasonal and annual variation in climatic factors, direct negative effects of N (NH4(+) toxicity) on Sphagnum production, and indirect effects (increase in pH and changes in plant species dominance under elevated NO3(-) alone and with PK) drive Sphagnum decomposition and hummock C and N dynamics at Whim.
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Affiliation(s)
- S Manninen
- Department of Environmental Sciences, University of Helsinki, P.O. Box 65 (Viikinkaari 2a), 00014 Helsinki, Finland.
| | - S Kivimäki
- Centre for Ecology and Hydrology Edinburgh, Bush Estate, Penicuik EH26 0QB, Scotland, UK
| | - I D Leith
- Centre for Ecology and Hydrology Edinburgh, Bush Estate, Penicuik EH26 0QB, Scotland, UK
| | - S R Leeson
- Centre for Ecology and Hydrology Edinburgh, Bush Estate, Penicuik EH26 0QB, Scotland, UK
| | - L J Sheppard
- Centre for Ecology and Hydrology Edinburgh, Bush Estate, Penicuik EH26 0QB, Scotland, UK
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Manninen S, Huttunen S, Vanhatalo M, Pakonen T, Hämäläinen A. Inter- and intra-specific responses to elevated ozone and chamber climate in northern birches. Environ Pollut 2009; 157:1679-1688. [PMID: 19147261 DOI: 10.1016/j.envpol.2008.12.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2008] [Revised: 10/21/2008] [Accepted: 12/11/2008] [Indexed: 05/27/2023]
Abstract
We studied the responses of micropropagated, northern provenances of downy, mountain and silver birches to elevated ozone (O(3)) and changing climate using open-top chambers (OTCs). Contrary to our hypothesis, northern birches were sensitive to O(3), i.e. O(3) levels of 31-36 ppb reduced the leaf and root biomasses by -10%, whereas wood biomass was affected to a lesser extent. The warmer and drier OTC climate enhanced growth in general, though there were differences among the species and clones, e.g. in bud burst and biomass production. Inter- and intra-specific responses to O(3) and changing climate relate to traits such as allocation patterns between the above- and belowground parts (i.e. root/shoot ratio), which further relate to nutrient and water economy. Our experiments may have mimicked future conditions quite well, but only long-term field studies can yield the information needed to forecast responses at both tree and ecosystem levels.
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Affiliation(s)
- S Manninen
- Botany Division, Department of Biology, P.O. Box 3000, FIN-90014, University of Oulu, Finland.
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Nygård K, Hakala M, Manninen S, Itou M, Sakurai Y, Hämäläinen K. Configurational energetics in ice ih probed by compton scattering. Phys Rev Lett 2007; 99:197401. [PMID: 18233110 DOI: 10.1103/physrevlett.99.197401] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2007] [Indexed: 05/25/2023]
Abstract
Temperature-induced changes in the ground-state electron momentum density of polycrystalline ice Ih are studied with high accuracy by Compton scattering utilizing synchrotron radiation. A unique feasibility of the technique to provide direct experimental information on configurational enthalpies and heat capacities is demonstrated. The configurational enthalpy, obtained with an accuracy of 1.5 meV, evolves linearly with temperature above T=100 K. Consequently the configurational heat capacity is found to be constant, c{p}{config}=(0.44+/-0.11) J g{-1} K-1, in this temperature regime. Obtaining these quantities experimentally is fundamentally important for evaluating the accuracy of molecular-dynamics simulations schemes.
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Affiliation(s)
- K Nygård
- Division of X-Ray Physics, Department of Physical Sciences, FI-00014, University of Helsinki, Finland.
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Nygård K, Hakala M, Pylkkänen T, Manninen S, Buslaps T, Itou M, Andrejczuk A, Sakurai Y, Odelius M, Hämäläinen K. Isotope quantum effects in the electron momentum density of water. J Chem Phys 2007; 126:154508. [PMID: 17461648 DOI: 10.1063/1.2723093] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The isotope quantum effects in the ground-state electron momentum density of water are studied at temperatures ranging from 5 to 90 degrees C by combining Compton scattering experiments utilizing synchrotron radiation and computational analysis within density functional theory. We observe clear differences in the momentum density between normal and heavy water at room temperature, which are interpreted as predominantly reflecting intramolecular structural differences. The changes in the momentum density upon increasing the temperature are found to be larger for heavy than for normal water, which is attributed primarily to temperature-induced intramolecular structural effects. Both model computations and an ab initio approach qualitatively reproduce the changes in the momentum density as a function of temperature.
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Affiliation(s)
- K Nygård
- Division of X-ray Physics, Department of Physical Sciences, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.
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Affiliation(s)
- S. Manninen
- a Department of Physics , University of Helsinki , Siltavuorenpenger 20 D, 00170 , Helsinki 17 , Finland
| | - P. Suortti
- a Department of Physics , University of Helsinki , Siltavuorenpenger 20 D, 00170 , Helsinki 17 , Finland
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Affiliation(s)
- R. S. Holt
- a Department of Physics , University of Warwick , Coventry , CV4 7AL, England
| | - J. L. Dubard
- a Department of Physics , University of Warwick , Coventry , CV4 7AL, England
| | - M. J. Cooper
- a Department of Physics , University of Warwick , Coventry , CV4 7AL, England
| | - T. Paakkari
- b Department of Physics , University of Helsinki , Helsinki , Finland
| | - S. Manninen
- c Department of Physics , University of Louisville , Kentucky , 40208 , U.S.A
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Sharma BK, Manninen S, Paakkari T, Richardson MW, Rundqvist S. Electron-momentum distribution and charge-transfer study of vanadium silicides. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/13642818408246524] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- B. K. Sharma
- a International Centre for Theoretical Physics , Trieste , 34100 , P.O.B. 586, Italy
- d Department of Physics , University of Rajasthan , Jaipur , 302004 , India
| | - S. Manninen
- b University of Helsinki, Department of Physics , Siltavuorenpenger 20 D, SF-00170, Helsinki , 17 , Finland
| | - T. Paakkari
- b University of Helsinki, Department of Physics , Siltavuorenpenger 20 D, SF-00170, Helsinki , 17 , Finland
| | - M. W. Richardson
- c Institute of Chemistry, University of Uppsala , Box 531, S-75121 , Sweden
| | - S. Rundqvist
- c Institute of Chemistry, University of Uppsala , Box 531, S-75121 , Sweden
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Affiliation(s)
- S. Manninen
- a Department of Physics , University of Warwick , Coventry , CV4 7AL , England
- b Department of Physics , University of Helsinki , Siltavuorenpenger 20 D, 00170 , Helsinki 17 , Finland
| | - N. G. Alexandropoulos
- a Department of Physics , University of Warwick , Coventry , CV4 7AL , England
- c Department of Physics , University of loannina , 453 32 , Ioannina , Greece
| | - M. J. Cooper
- a Department of Physics , University of Warwick , Coventry , CV4 7AL , England
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Nygård K, Hakala M, Manninen S, Andrejczuk A, Itou M, Sakurai Y, Pettersson LGM, Hämäläinen K. Compton scattering study of water versus ice Ih: intra- and intermolecular structure. Phys Rev E Stat Nonlin Soft Matter Phys 2006; 74:031503. [PMID: 17025636 DOI: 10.1103/physreve.74.031503] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2006] [Revised: 07/12/2006] [Indexed: 05/12/2023]
Abstract
The hydrogen-bond geometries in water and polycrystalline ice Ih are studied using synchrotron radiation-based Compton scattering data of unprecedented statistical accuracy and consistency. By combining the experimental data with model calculations utilizing density functional theory, we show that the technique provides unique and complementary information on hydrogen bonding in water. The comparison of water and ice indicates the necessity of including a local intra-intermolecular geometric correlation for water, relating the intramolecular O-H bond length to the corresponding hydrogen-bond geometry. By using the hydrogen-bond geometries obeying this correlation, we demonstrate a further constraint on the angular distortions of the hydrogen bonds in water.
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Affiliation(s)
- K Nygård
- Division of X-ray Physics, Department of Physical Sciences, P.O. Box 64, FI-00014, University of Helsinki, Finland.
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Hakala M, Nygård K, Manninen S, Huotari S, Buslaps T, Nilsson A, Pettersson LGM, Hämäläinen K. Correlation of hydrogen bond lengths and angles in liquid water based on Compton scattering. J Chem Phys 2006; 125:084504. [PMID: 16965026 DOI: 10.1063/1.2273627] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The temperature-dependent hydrogen-bond geometry in liquid water is studied by x-ray Compton scattering using synchrotron radiation combined with density functional theory analysis. Systematic changes, related to the weakening of hydrogen bonding, are observed in the shape of the Compton profile upon increasing the temperature. Using model calculations and published distribution functions of hydrogen-bond geometries obtained from a NMR study we find a significant correlation between the hydrogen-bond length and angle. This imposes a new constraint on the possible local structure distributions in liquid water. In particular, the angular distortions of the short hydrogen bonds are significantly restricted.
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Affiliation(s)
- M Hakala
- Division of X-ray Physics, Department of Physical Sciences, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.
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Affiliation(s)
- S. Manninen
- a Department of Physics , University of Helsinki , SF-00170, Helsinki , 17 , Finland
| | - T. Paakkari
- a Department of Physics , University of Helsinki , SF-00170, Helsinki , 17 , Finland
| | - K. Kajantie
- a Department of Physics , University of Helsinki , SF-00170, Helsinki , 17 , Finland
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Manninen S, Paakkari T. Bonding in titanium carbide. I. Experimental electron momentum distributions in polycrystalline Ti and TiC. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/9/1/017] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Manninen S, Huttunen S. Response of needle sulphur and nitrogen concentrations of Scots pine versus Norway spruce to SO2 and NO2. Environ Pollut 2000; 107:421-436. [PMID: 15092988 DOI: 10.1016/s0269-7491(99)00158-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/1999] [Accepted: 06/01/1999] [Indexed: 05/24/2023]
Abstract
The results of two field studies and an open-top chamber fumigation experiment showed that the response of mature Scots pine to SO(2) and NO(2) differed from that of mature Norway spruce. Moreover, the response of pine seedlings to SO(2) and NO(2) differed from that of mature trees. The greater increase in the needle total S concentrations of pine suggested more abundant stomatal uptake of SO(2) compared to spruce. Both pine seedlings and mature trees also seemed to absorb more N from atmospheric deposition. Mature pine was able to assimilate SO(4)(2-) derived from SO(2) into organic S more effectively than mature spruce at the high S and N deposition sites, whereas both pine and spruce seedlings accumulated SO(4)-S under NO(2)+SO(2) exposure. Spruce, in turn, accumulated SO(4)-S even when well supplied with N. Net assimilation of SO(4)(2-) in conifer seedlings was enhanced markedly by elevated temperature. To protect the northern coniferous forests against the harmful effects of S and N deposition, it is recommended that the critical level for SO(2) as a growing season mean be set at 5-10 microg m(-3) and NO(2) at 10-15 microg m(-3), depending on the 'effective temperature sum' and/or whether SO(2) and NO(2) occur alone or in combination.
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Affiliation(s)
- S Manninen
- Department of Biology, University of Oulu, PO Box 3000, 90401 Oulu, Finland.
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Hämäläinen K, Manninen S, Kao C, Caliebe W, Hastings JB, Bansil A, Kaprzyk S, Platzman PM. High resolution Compton scattering study of Be. Phys Rev B Condens Matter 1996; 54:5453-5459. [PMID: 9986504 DOI: 10.1103/physrevb.54.5453] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Manninen S, Honkimäki V, Hämäläinen K, Laukkanen J, Blaas C, Redinger J, McCarthy J, Suortti P. Compton-scattering study of the electronic properties of the transition-metal alloys FeAl, CoAl, and NiAl. Phys Rev B Condens Matter 1996; 53:7714-7720. [PMID: 9982215 DOI: 10.1103/physrevb.53.7714] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lawson PK, Timms DN, Dixon MA, Cooper MJ, McCarthy JE, Hämäläinen K, Manninen S, Tschentscher T. The spin dependent momentum density of hexagonal close packed cobalt. J Xray Sci Technol 1996; 6:299-307. [PMID: 21307529 DOI: 10.3233/xst-1996-6306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Directional-spin-dependent Compton profiles of ferromagnetic hexagonal close packed cobalt metal have been measured with 117 keV and 167 keV circularly polarized synchrotron radiation at the new ESRF high energy beamline. Significantly improved resolution was achieved at the higher energy. The results have been compared with the profile predicted from an augmented plane wave (APW) calculation of the electron momentum density in the hexagonal phase. No significant difference was found between the c-axis and the basal plane magnetic profiles. The experiments show that there is substantially more 3d spin density at high momentum than in the model calculation. After correcting for this deficiency we find that the 4s-p component of the momentum density remains significantly different than predicted.
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Affiliation(s)
- P K Lawson
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
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Manninen S, Huttunen S, Rautio P, Perämäki P. Assessing the critical level of SO2 for Scots pine in situ. Environ Pollut 1996; 93:27-38. [PMID: 15091366 DOI: 10.1016/0269-7491(96)00018-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/1995] [Accepted: 01/22/1996] [Indexed: 05/24/2023]
Abstract
A field survey was performed in eastern Finland, where measured ambient SO2 concentrations were 1.4-3.8 microg m(-3) a(-1) and bulk S deposition 0.17-0.32 g m(-2) a(-1) in 1991-1993. The accumulation of sulphur (S) in needles of Scots pine (Pinus sylvestris L.) was studied with XRF, IC and FESEM analyses and the needle damage examined under a light microscope and by SEM. Foliar N concentrations were also measured. Foliar total S concentrations were observed to be above the normal S level (500-700 microg g(-1)) over almost the whole area. Slight chlorosis and/or necrosis of the needle tips and stomatal areas, changes in the needle surface waxes and localization of S into needle tips and mesophyll cells around the stomata suggested the impact of S deposition, as did the calculations of St/Nt, and 'predicted' and 'excess' S. A concentration of about 900 microg g(-1) may be considered a critical level for foliar St in areas with low N supply.
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Affiliation(s)
- S Manninen
- Department of Biology, University of Oulu, Linnanmaa, 90570 Oulu, Finland
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Blaas C, Redinger J, Manninen S, Honkimäki V, Hämäläinen K, Suortti P. High Resolution Compton Scattering in Fermi Surface Studies: Application to FeAl. Phys Rev Lett 1995; 75:1984-1987. [PMID: 10059179 DOI: 10.1103/physrevlett.75.1984] [Citation(s) in RCA: 10] [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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Abstract
Construction and performance of a spectrometer based on a high-voltage generator and W-anode X-ray tube are described. W Kα
1 radiation is monochromated using a bent Ge (400) crystal. The obtained monochromatic flux is 107 photons s−1 and the beam size at the focal point 15 × 0.5 mm. Comparison is made with a 241Am γ-ray source, which has an almost equal photon energy. The W Kα
1 beam does not exhibit the low-energy tail typical for the γ-ray source but, on the other hand, a small contribution of doublet energy was observed. Directional Compton profiles of pyrolytic graphite were measured with both sources and essentially the same features were found.
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Manninen S, Hämäläinen K. High-resolution inelastic x-ray scattering study of the boron K absorption edge. Phys Rev B Condens Matter 1992; 45:3878-3881. [PMID: 10001988 DOI: 10.1103/physrevb.45.3878] [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: 04/12/2023]
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Manninen S, Hämäläinen K, Graeffe J. Inelastic photon scattering from K-shell electrons of Cu and Zr. Phys Rev B Condens Matter 1990; 41:1224-1226. [PMID: 9993826 DOI: 10.1103/physrevb.41.1224] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Redinger J, Podloucky R, Manninen S, Pitkänen T, Aikala O. The electronic structure of NaF and CaO studied by Compton scattering. Acta Crystallogr A 1989. [DOI: 10.1107/s0108767389002710] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Manninen S, Eteläniemi V, Suortti P. Comment on "Electronic structure and x-ray Raman spectrum of solid boron". Phys Rev Lett 1988; 61:2815. [PMID: 10039231 DOI: 10.1103/physrevlett.61.2815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Manninen S, Suortti P, Cooper MJ, Chomilier J, Loupias G. X-ray resonant Raman cross section and yield in nickel. Phys Rev B Condens Matter 1986; 34:8351-8356. [PMID: 9939547 DOI: 10.1103/physrevb.34.8351] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Benedek R, Prasad R, Manninen S, Sharma BK, Bansil A, Mijnarends PE. Compton profiles for polycrystalline CuxNi1-x alloys: Theory and experiment. Phys Rev B Condens Matter 1985; 32:7650-7658. [PMID: 9936931 DOI: 10.1103/physrevb.32.7650] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Manninen S, Pattison P, Cooper M, Ahlenius T, Lindner P. Experimental and theoretical compton profiles for formamide and p-benzoquinone. Chem Phys Lett 1975. [DOI: 10.1016/0009-2614(75)85694-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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