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Wang H, Liu L, Gao Z, Yang L, Naren G, Mao S. Structure and elasticity of CaC 2O 5 suggests carbonate contribution to the seismic anomalies of Earth's mantle. Nat Commun 2024; 15:755. [PMID: 38272879 PMCID: PMC10811330 DOI: 10.1038/s41467-024-44925-9] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 01/05/2024] [Indexed: 01/27/2024] Open
Abstract
Knowledge of carbonate compounds under high pressure inside Earth is key to understanding the internal structure of the Earth, the deep carbon cycle and major geological events. Here we use first-principles simulations to calculate the structure and elasticity of CaC2O5-minerals with different symmetries under high pressure. Our calculations show that CaC2O5-minerals represent a group of low-density low-seismic-wave velocity mantle minerals. Changes in seismic wave velocity caused by the phase transformation of CaC2O5-Cc to CaC2O5-I[Formula: see text]2d (CaC2O5-C2-l) agree with wave velocity discontinuity at a depth of 660 km in the mantle transition zone. Moreover, when CaC2O5-Fdd2 transforms into CaC2O5-C2 under 70 GPa, its shear wave velocity decreases by 7.4%, and its density increases by 5.8%, which is consistent with the characteristics of large low-shear-velocity provinces (LLSVPs). Furthermore, the shear wave velocity of CaC2O5-I[Formula: see text]2d is very similar to that of cubic Ca-perovskite, which is one of the main constituents of the previously detected LLSVPs. Therefore, we propose that CaC2O5 and its high-pressure polymorphs may be a main component of LLSVPs.
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Affiliation(s)
- Hanyu Wang
- State Key Laboratory of Geological Processes and Mineral Resources, and School of Earth Sciences and Resources, China University of Geosciences, 100083, Beijing, China
- United Laboratory of High-Pressure Physics and Earthquake Science, Institute of Earthquake Forecasting, China Earthquake Administration, 100036, Beijing, China
| | - Lei Liu
- United Laboratory of High-Pressure Physics and Earthquake Science, Institute of Earthquake Forecasting, China Earthquake Administration, 100036, Beijing, China.
| | - Zihan Gao
- United Laboratory of High-Pressure Physics and Earthquake Science, Institute of Earthquake Forecasting, China Earthquake Administration, 100036, Beijing, China
| | - Longxing Yang
- State Key Laboratory of Geological Processes and Mineral Resources, and School of Earth Sciences and Resources, China University of Geosciences, 100083, Beijing, China
- United Laboratory of High-Pressure Physics and Earthquake Science, Institute of Earthquake Forecasting, China Earthquake Administration, 100036, Beijing, China
| | - Gerile Naren
- United Laboratory of High-Pressure Physics and Earthquake Science, Institute of Earthquake Forecasting, China Earthquake Administration, 100036, Beijing, China
| | - Shide Mao
- State Key Laboratory of Geological Processes and Mineral Resources, and School of Earth Sciences and Resources, China University of Geosciences, 100083, Beijing, China.
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Zhang Y, Naren G, Bao T, Shi Y, Han J. Synthesis, Characterization, and DFT studies of Praseodymium (III) Octanoyl‐DL‐aminocarboxylate Complexes. ChemistrySelect 2022. [DOI: 10.1002/slct.202104100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ying Zhang
- Department of Physics and Electronic Information Inner Mongolia Normal University 81 Zhaowuda Rd. Hohhot 010022 China
| | - Gerile Naren
- Department of Physics and Electronic Information Inner Mongolia Normal University 81 Zhaowuda Rd. Hohhot 010022 China
- Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials Inner Mongolia Normal University 81 Zhaowuda Rd. Hohhot 010022 China
| | - Tana Bao
- Department of Physics and Electronic Information Inner Mongolia Normal University 81 Zhaowuda Rd. Hohhot 010022 China
| | - Yifeng Shi
- Department of Physics and Electronic Information Inner Mongolia Normal University 81 Zhaowuda Rd. Hohhot 010022 China
| | - Jiakang Han
- Department of Physics and Electronic Information Inner Mongolia Normal University 81 Zhaowuda Rd. Hohhot 010022 China
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Naren G, Wang L, Zhang X, Cheng L, Yang S, Yang J, Guo J, Nashun B. The reversible reproductive toxicity of 5-fluorouracil in mice. Reprod Toxicol 2021; 101:1-8. [PMID: 33581264 DOI: 10.1016/j.reprotox.2021.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 08/14/2020] [Revised: 01/15/2021] [Accepted: 02/03/2021] [Indexed: 11/22/2022]
Abstract
5-Fluorouracil (5-FU) is a "cytotoxic" drug used for cancer chemotherapy, which inhibits cells division via affecting DNA synthesis. Although being widely used for cancer treatment, 5-FU has non-negligible side effects. In the present study, the effects of 5-FU on oocyte and early embryonic development were investigated. Multiple intraperitoneal administration of 5-FU (50 mg/kg/day) in female mice resulted in small ovarian size and reduced number of corpus luteum in the ovary, and lead to ovulation failure. However, these defects could be recovered after one week. In vitro experiments further indicated that exposure to 5-FU inhibited oocytes maturation and reduced developmental potential of pre-implantation embryos. Our data suggested that 5-FU has negative impact on ovarian function, oocyte and early embryonic development, but the adverse effect could be reversed after withdrawal of 5-FU administration.
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Affiliation(s)
- Gerile Naren
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Lu Wang
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Xiaolei Zhang
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Lijuan Cheng
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Shuai Yang
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Jiajie Yang
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Jiaojiao Guo
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Buhe Nashun
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot, China.
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Naren G, Ren TY, Bao LH, Chao LM, Tegus O. Preparation and Optical Absorption Properties of Ternary Rare Earth Boride La xPr 1-xB 6 Submicron Powders. J Nanosci Nanotechnol 2020; 20:5064-5069. [PMID: 32126700 DOI: 10.1166/jnn.2020.18517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
As multifunctional materials, rare-earth hexaborides (RB6) display many interesting physical properties such as optical absorption, magnetic and thermionic emission. With the wide application of rare earth hexaboride and the continuous extension of its research fields, researchers have studied the synthesis of multi-rare earth hexaboride nano-powders and their thermal emission and light absorption properties. In the present work, ternary Single-phase LaxPr1-xB6 submicron powders are successfully synthesized using a solid-state reaction, in which lanthanum chloride (LaCl₃) and praseodymium chloride (PrCl₃) are used as rare-earth source and NaBH₄ as the boron source under continuous vacuum conditions. The reaction temperature is 1150 °C and the holding time is 2 h. The Pr doping effects on crystal structure, grain morphology, and optical absorption properties were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and ultraviolet-vis absorption measurements. The XRD patterns show that the diffraction peaks are sharp and well-defined, and no other extra impurity peaks were detected, indicating the characteristics of well-crystallized materials. It is found that all the LaxPr1-xB6 solid powders are of single phase. The SEM results demonstrate that the cubicshaped ternary LaxPr1-xB6 submicron crystals with a size of 50~200 nm are obtained. The TEM images reveal the cubic single-crystalline nature, and the FFT patterns implies the lattice fringe d = 0.416 nm which agrees well with the (100) crystal plane. The elements mapping results indicates that the Pr atoms occupied the lattice sites of LaB6. The optical absorption results show that the absorption valley of LaB6 are located at 591 nm. With the increase of Pr doping contents from 0.2 to 0.8, the absorption valley moves from 596.3 nm to 612.9 nm, indicating the characteristics of visible light high transparency. The first-principle calculation results manifest that the move of the absorption valley of LaB6 in the visible region after doping Pr is related to the decrease of kinetic energy of electrons near the Fermi plane. X-ray photoelectron spectroscopy (XPS) analysis shows that the La and Pr exist in the type of La3+ and Pr3+ in LaxPr1-xB6. Therefore, it exists as an efficient optical absorption material. The LaxPr1-xB6 should open up a new route to extend the optical applications of rare-earth hexaborides.
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Affiliation(s)
- Gerile Naren
- College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China
| | - Tian-Yi Ren
- Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, Inner Mongolia Normal University, Hohhot 010022, China
| | - Li-Hong Bao
- College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China
| | - Luo-Meng Chao
- College of Science, Inner Mongolia University of Science and Technology, Baotou 014010, China
| | - O Tegus
- Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, Inner Mongolia Normal University, Hohhot 010022, China
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Naren G, Bao T, Ning J, Tegus O. Optical properties and aggregation behavior of environmentally friendly Lanthanum (III) acyl–alaninnate complexes. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.04.023] [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: 10/24/2022] Open
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Naren G, Yasuda A, Iida M, Harada M, Suzuki T, Kato M. Aggregation in methanol and formation of molecular glasses for europium(iii) N-acylaminocarboxylates: effects of alkyl chain length and head group. Dalton Trans 2009:5512-22. [DOI: 10.1039/b820169b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Naren G, Masuda R, Iida M, Harada M, Kurosu H, Suzuki T, Kimura T. Formation of molecular glasses and the aggregation in solutions for lanthanum(iii), calcium(ii), and yttrium(iii) complexes of octanoyl-dl-alaninate. Dalton Trans 2008:1698-709. [DOI: 10.1039/b713768k] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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