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Cotet LC, Cadar C, Mihis A, Magyari K, Muresan-Pop M, Pop LC, Mihaila A, Szekely I, Dragan S, Dudescu M, Zgura I, Matei E, Baia M, Baibarac M, Anghel I, Baia L. Mixture of Graphene Oxide/Phosphoric Acid/Melamine as Coating for Improved Fire Protective Performance and Enhancement of Surface Electrical Properties on Wood Chipboard. J Nanosci Nanotechnol 2021; 21:2312-2322. [PMID: 33500047 DOI: 10.1166/jnn.2021.18959] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Looking for multifunctional materials, an assessment of the performances both as fire retardant and generator of electrically conductive surfaces for a three component mixture of graphene oxide, phosphoric acid and melamine applied on wood chipboard was performed. A simple approach was used to investigate the intumescent char formation and quantify the loss mass during vertical burning tests, in which the prepared samples were exposed for a certain time interval to a flame generated by an ethanol lamp in ambient conditions. Moreover, mass loss evolution and structural changes that occur during the burning process were more comprehensive investigated by differential thermal and thermogravimetric (DTA/TGA) techniques. By comparing the performances between the wood chipboard samples without any coverage and those covered with one or multiple component mixture, an increase of protection against the fire action was noticed when the three component mixture was used. Also, an improvement of the electrical properties was observed, after flame exposure of the samples covered with multiple layers (i.e., two and three), when the three component mixture was used. Morphological and structural investigations by microscopy (optical and electronic-SEMEDX), X-ray diffraction (XRD) and spectral (Raman, FTIR) methods are described. An assessment of market potential is also discussed.
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Affiliation(s)
- L C Cotet
- Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, RO-400028, Cluj-Napoca, 077125, Romania
- Institute of Research-Development-Innovation in Applied Natural Sciences, Babes-Bolyai University, RO-400294, Cluj-Napoca, Romania
| | - C Cadar
- Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, RO-400028, Cluj-Napoca, 077125, Romania
- Institute of Research-Development-Innovation in Applied Natural Sciences, Babes-Bolyai University, RO-400294, Cluj-Napoca, Romania
- Department of Physics and Chemistry, Faculty of Materials and Environmental Engineering, Technical University of Cluj-Napoca,Muncii Bulevardul 103-105, RO-400641, Cluj-Napoca, Romania
| | - A Mihis
- Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, RO-400028, Cluj-Napoca, 077125, Romania
- Institute of Research-Development-Innovation in Applied Natural Sciences, Babes-Bolyai University, RO-400294, Cluj-Napoca, Romania
| | - K Magyari
- Faculty of Physics, Babes-Bolyai University, RO-400084, Cluj-Napoca, Romania
- Nanostructured Materials and Bio-Nano-Interfaces Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, RO-400271, Cluj-Napoca, Romania
| | - M Muresan-Pop
- Faculty of Physics, Babes-Bolyai University, RO-400084, Cluj-Napoca, Romania
- Nanostructured Materials and Bio-Nano-Interfaces Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, RO-400271, Cluj-Napoca, Romania
| | - L C Pop
- Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, RO-400028, Cluj-Napoca, 077125, Romania
- Nanostructured Materials and Bio-Nano-Interfaces Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, RO-400271, Cluj-Napoca, Romania
| | - A Mihaila
- Faculty of Economics and Business Administration, Babes-Bolyai University, RO-400591, Cluj-Napoca, Romania
| | - I Szekely
- Faculty of Physics, Babes-Bolyai University, RO-400084, Cluj-Napoca, Romania
- Nanostructured Materials and Bio-Nano-Interfaces Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, RO-400271, Cluj-Napoca, Romania
| | - S Dragan
- Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, RO-400028, Cluj-Napoca, 077125, Romania
| | - M Dudescu
- Department of Mechanical Engineering, Faculty of Mechanics, Technical University of Cluj-Napoca, Muncii Bulevardul 103-105, RO-400641, Cluj-Napoca, Romania
| | - I Zgura
- Lab. Optical Process in Nanostructured Materials (LOPNM), National Institute of Materials Physics, Atomistilor str. 405 A, Bucharest-Magurele, 077125, Romania
| | - E Matei
- Lab. Optical Process in Nanostructured Materials (LOPNM), National Institute of Materials Physics, Atomistilor str. 405 A, Bucharest-Magurele, 077125, Romania
| | - M Baia
- Faculty of Physics, Babes-Bolyai University, RO-400084, Cluj-Napoca, Romania
- Nanostructured Materials and Bio-Nano-Interfaces Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, RO-400271, Cluj-Napoca, Romania
| | - M Baibarac
- Lab. Optical Process in Nanostructured Materials (LOPNM), National Institute of Materials Physics, Bucharest-Magurele, 077125, Romania
| | - I Anghel
- Fire Officers Faculty, "Alexandru Ioan Cuza" Police Academy, Bucharest, 022451, Romania
| | - L Baia
- Institute of Research-Development-Innovation in Applied Natural Sciences, Babes-Bolyai University, RO-400294, Cluj-Napoca, Romania
- Faculty of Physics, Babes-Bolyai University, RO-400084, Cluj-Napoca, Romania
- Nanostructured Materials and Bio-Nano-Interfaces Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, RO-400271, Cluj-Napoca, Romania
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Castle M, Fiedler N, Pop LC, Schneider SJ, Schlussel Y, Sukumar D, Hao L, Shapses SA. Three Doses of Vitamin D and Cognitive Outcomes in Older Women: A Double-Blind Randomized Controlled Trial. J Gerontol A Biol Sci Med Sci 2020; 75:835-842. [PMID: 30951148 PMCID: PMC7164532 DOI: 10.1093/gerona/glz041] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Indexed: 12/19/2022] Open
Abstract
Vitamin D may affect cognitive performance, but previous studies are either short term or observational. We conducted a randomized controlled trial of vitamin D supplementation on domain-specific cognitive measures in postmenopausal women. Overweight/obese women with serum 25-hydroxyvitamin D (25OHD) levels less than 30 ng/mL were recruited. Vitamin D3 supplementation (600, 2,000, or 4,000 IU/d) was randomly assigned in a double-blinded manner for 1 year. Serum 25-hydroxyvitamin D, osteocalcin (total and undercarboxylated), amyloid beta, parathyroid hormone, and estradiol were analyzed before and after supplementation. Cognitive tests were administered after treatment. The women (58 ± 6 years; body mass index, 30.0 ± 3.5 kg/m2) had a baseline serum 25-hydroxyvitamin D level of 22.6 ± 5.8 ng/mL that increased to 30.2 ± 5.6, 36.0 ± 4.9, and 40.8 ± 7.0 ng/mL in the 600, 2,000, and 4,000 IU/d groups, respectively (p < .001). Participants taking 2,000 IU/d compared to other doses performed better in learning and memory tests (p < .05), yet the 4,000 IU/d group had a slower reaction time compared to the 600 IU/d group. Multiple regression indicated that serum undercarboxylated osteocalcin predicted tasks associated with reaction time and executive function, whereas body mass index and parathyroid hormone negatively predicted reaction time and executive function (p ≤ .01). These data suggest that vitamin D has differential effects on domain-specific cognitive measures and that a higher dose may negatively affect reaction time.
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Affiliation(s)
- Monica Castle
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey
- Rutgers-Robert Wood Johnson Medical School, New Brunswick, New Jersey
| | - Nancy Fiedler
- Environmental and Occupational Health Sciences Institute, School of Public Health, Rutgers University, Piscataway, New Jersey
| | - Lilliana Claudia Pop
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey
| | - Stephen J Schneider
- Department of Medicine, Rutgers-Robert Wood Johnson Medical School, New Brunswick, New Jersey
| | - Yvette Schlussel
- Environmental and Occupational Health Sciences Institute, School of Public Health, Rutgers University, Piscataway, New Jersey
| | - Deeptha Sukumar
- Department of Nutritional Sciences, Drexel University, Philadelphia, Pennsylvania
| | - Lihong Hao
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey
| | - Sue A Shapses
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey
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Mauro T, Hao L, Pop LC, Buckley B, Schneider SH, Bandera EV, Shapses SA. Circulating zearalenone and its metabolites differ in women due to body mass index and food intake. Food Chem Toxicol 2018; 116:227-232. [PMID: 29678722 DOI: 10.1016/j.fct.2018.04.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 04/03/2018] [Accepted: 04/12/2018] [Indexed: 01/10/2023]
Abstract
The environmental estrogen, zearalenone (ZEA), is found in the food supply from Fusarium fungal contamination in grains and sometimes used as a growth promoter for beef cattle. Long-term exposure to ZEA and its metabolites may present health risk due to higher estrogenic activity. Serum ZEA metabolites were measured to determine the exposure and the association with food intake in 48 overweight/obese women (52 ± 9 years). The free and conjugated ZEA indicated the highest detection rate of all the metabolites. Conjugated ZEA and total ZEA metabolites were lower (p = 0.02) in overweight/obese than normal weight women, and free metabolites were either the same or showed a trend to be higher. In addition, those with highest (280-480 g/d) compared those with lowest (<115 g/d) meat consumption had higher conjugated serum ZEA metabolite concentrations (p < 0.05). Intakes of other food groups (i.e., dairy, cereal, etc.) were not associated with ZEA metabolites. These findings indicate that ZEA and its metabolites are detectable in nearly all women and concentrations are associated with greater meat intake, and influenced by body mass index. Determining how the food supply influences human concentrations of ZEA metabolites is warranted, as well as determining vulnerable populations.
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Affiliation(s)
- T Mauro
- School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ 08901, USA
| | - L Hao
- School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ 08901, USA
| | - L C Pop
- School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ 08901, USA
| | - B Buckley
- Environmental and Occupational Health Sciences Institute (EOHSI), Rutgers University, Piscataway, NJ 08854, USA
| | - S H Schneider
- Department of Medicine, Division of Endocrinology, Nutrition and Metabolism, Rutgers-Robert Wood Johnson University Hospital, New Brunswick, NJ 08901, USA
| | - E V Bandera
- Population Science, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ 08903, USA
| | - S A Shapses
- School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ 08901, USA.
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Pop LC, Sukumar D, Schneider SH, Schlussel Y, Stahl T, Gordon C, Wang X, Papathomas TV, Shapses SA. Three doses of vitamin D, bone mineral density, and geometry in older women during modest weight control in a 1-year randomized controlled trial. Osteoporos Int 2017; 28:377-388. [PMID: 27535752 DOI: 10.1007/s00198-016-3735-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 08/04/2016] [Indexed: 12/21/2022]
Abstract
UNLABELLED The effects of higher than recommended vitamin D doses on bone mineral density (BMD) and quality are not known. In this study, higher intakes, in postmenopausal women undergoing weight control over 1 year, had no effect on areal or volumetric BMD but prevented the deterioration in cortical bone geometry. INTRODUCTION Studies examining how bone responds to a standard dose of vitamin D supplementation have been inconsistent. In addition, the effects of higher doses on BMD and quality are not known. Postmenopausal women undergoing weight control to improve health outcomes are particularly at risk for bone loss and might benefit from supplemental vitamin D intake above the recommended allowance. METHODS This 1-year-long, randomized, double-blind controlled study addresses whether vitamin D supplementation, in healthy overweight/obese older women, affects BMD and bone structural parameters. In addition, bone turnover and serum total, free, and bioavailable 25-hydroxyvitamin D (25OHD) responses to one of three daily levels of vitamin D3 (600, 2000, 4000 IU) with 1.2 Ca g/day during weight control were examined. RESULTS Fifty-eight women (age, 58 ± 6 years; body mass index, 30.2 ± 3.8 kg/m2, serum 25OHD, 27.3 ± 4.4 ng/mL) were randomized to treatment. After 1 year, serum 25OHD concentrations increased to 26.5 ± 4.4, 35.9 ± 4.5, and 41.5 ± 6.9 ng/mL, in groups 600, 2000, and 4000 IU, respectively, and differed between groups (p < 0.01). Weight change was similar between groups (-3.0 ± 4.1 %). Cortical (Ct) thickness of the tibia changed by -1.5 ± 5.1 %, +0.6 ± 3.2 %, and +2.0 ± 4.5 % in groups 600, 2000, and 4000 IU, respectively, and each group was significantly different from each other (p < 0.05). CONCLUSION The decline in Ct thickness was prevented with higher vitamin D3 supplementation, but there were no other significant changes due to treatment over 1 year. Whether these findings translate to changes in biomechanical properties leading to reduced fracture risk should be addressed in future studies.
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Affiliation(s)
- L C Pop
- Department of Nutritional Sciences, Rutgers University, 96 Lipman Drive, New Brunswick, NJ, 08901-8525, USA
| | - D Sukumar
- Department of Nutritional Sciences, Drexel University, Philadelphia, PA, USA
| | - S H Schneider
- Division of Endocrinology, Metabolism and Nutrition, Department of Medicine, Rutgers-Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Y Schlussel
- Department of Nutritional Sciences, Rutgers University, 96 Lipman Drive, New Brunswick, NJ, 08901-8525, USA
| | - T Stahl
- Department of Radiology, Rutgers-Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - C Gordon
- Department of Radiology, McMaster University, Hamilton, Ontario, Canada
| | - X Wang
- Division of Endocrinology, Metabolism and Nutrition, Department of Medicine, Rutgers-Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - T V Papathomas
- Department of Biomedical Engineering & Center for Cognitive Science, Rutgers University, New Brunswick, NJ, USA
| | - S A Shapses
- Department of Nutritional Sciences, Rutgers University, 96 Lipman Drive, New Brunswick, NJ, 08901-8525, USA.
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