1
|
Zachos LG, Ziegler A. Selective concentration of iron, titanium, and zirconium substrate minerals within Gregory's diverticulum, an organ unique to derived sand dollars (Echinoidea: Scutelliformes). PeerJ 2024; 12:e17178. [PMID: 38590702 PMCID: PMC11000648 DOI: 10.7717/peerj.17178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 03/08/2024] [Indexed: 04/10/2024] Open
Abstract
Gregory's diverticulum, a digestive tract structure unique to a derived group of sand dollars (Echinoidea: Scutelliformes), is filled with sand grains obtained from the substrate the animals inhabit. The simple methods of shining a bright light through a specimen or testing response to a magnet can reveal the presence of a mineral-filled diverticulum. Heavy minerals with a specific gravity of >2.9 g/cm3 are selectively concentrated inside the organ, usually at concentrations one order of magnitude, or more, greater than found in the substrate. Analyses of diverticulum content for thirteen species from nine genera, using optical mineralogy, powder X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy, as well as micro-computed tomography shows the preference for selection of five major heavy minerals: magnetite (Fe3O4), hematite (Fe2O3), ilmenite (FeTiO3), rutile (TiO2), and zircon (ZrSiO4). Minor amounts of heavy or marginally heavy amphibole, pyroxene and garnet mineral grains may also be incorporated. In general, the animals exhibit a preference for mineral grains with a specific gravity of >4.0 g/cm3, although the choice is opportunistic and the actual mix of mineral species depends on the mineral composition of the substrate. The animals also select for grain size, with mineral grains generally in the range of 50 to 150 μm, and do not appear to alter this preference during ontogeny. A comparison of analytical methods demonstrates that X-ray attenuation measured using micro-computed tomography is a reliable non-destructive method for heavy mineral quantification when supported by associated analyses of mineral grains extracted destructively from specimens or from substrate collected together with the specimens. Commonalities in the electro-chemical surface properties of the ingested minerals suggest that such characteristics play an important role in the selection process.
Collapse
Affiliation(s)
- Louis G. Zachos
- Department of Geology and Geological Engineering, University of Mississippi, Oxford, Mississippi, United States
| | - Alexander Ziegler
- Bonner Institut für Organismische Biologie, Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany
| |
Collapse
|
2
|
Kostova I. Therapeutic and Diagnostic Agents based on Bioactive Endogenous and Exogenous Coordination Compounds. Curr Med Chem 2024; 31:358-386. [PMID: 36944628 DOI: 10.2174/0929867330666230321110018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/25/2023] [Accepted: 02/10/2023] [Indexed: 03/23/2023]
Abstract
Metal-based coordination compounds have very special place in bioinorganic chemistry because of their different structural arrangements and significant application in medicine. Rapid progress in this field increasingly enables the targeted design and synthesis of metal-based pharmaceutical agents that fulfill valuable roles as diagnostic or therapeutic agents. Various coordination compounds have important biological functions, both those initially present in the body (endogenous) and those entering the organisms from the external environment (exogenous): vitamins, drugs, toxic substances, etc. In the therapeutic and diagnostic practice, both the essential for all living organisms and the trace metals are used in metal-containing coordination compounds. In the current review, the most important functional biologically active compounds were classified group by group according to the position of the elements in the periodic table.
Collapse
Affiliation(s)
- Irena Kostova
- Department of Chemistry, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav St., Sofia 1000, Bulgaria
| |
Collapse
|
3
|
Panichev AM, Baranovskaya NV, Seryodkin IV, Chekryzhov IY, Vakh EA, Soktoev BR, Belyanovskaya AI, Makarevich RA, Lutsenko TN, Popov NY, Ruslan AV, Ostapenko DS, Vetoshkina AV, Aramilev VV, Kholodov AS, Golokhvast KS. Landscape REE anomalies and the cause of geophagy in wild animals at kudurs (mineral salt licks) in the Sikhote-Alin (Primorsky Krai, Russia). ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2022; 44:1137-1160. [PMID: 34212291 DOI: 10.1007/s10653-021-01014-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 06/14/2021] [Indexed: 06/13/2023]
Abstract
To test the "rare earth" hypothesis of geophagy, geological and hydrogeochemical studies unparalleled anywhere in the world were carried out at kudurs (salt licks) in two districts in the Primorsky Krai, Russia. The mineral and chemical compositions of geophagic earth consumed by animals, the chemical composition of surface waters and vegetation, and the chemical composition of biological tissues of red deer (Cervus elaphus) were studied in this research. It was found that ultra-fresh surface and fontinal waters in the studied areas contain anomalously high concentrations of rare earth elements (REE), the sums of which exceeded the average values in the Primorsky Krai and worldwide by tenfold, and more. The presence of landscape REE anomalies is confirmed by elevated concentrations of these elements in vegetation. Using electron microscopy, it was determined that the sources of REE in landscape components are rocks containing secondary, readily soluble, REE minerals (hydrophosphates and fluorocarbonates). The study of the chemical composition of animal tissues showed the presence of significant concentrations of heavy REE (HREE) in the blood and brain, which indirectly indicates a high probability of animals developing stress reactions against the background REE-elementosis. Eaten earthy substances in both areas are represented by mixtures of smectite clays and zeolites with high ion-exchange properties. In the digestive tract of animals, such sorbents actively interact with the biological electrolyte, saturating it with sodium ions and absorbing HREE. The main meaning of geophagy is regulation of the concentration and proportion of REE in the body. Sometimes it manifests itself in intake of significant amounts of Na.
Collapse
Affiliation(s)
- A M Panichev
- Pacific Geographical Institute FEB RAS, Vladivostok, Russia
- Far Eastern Federal University, Vladivostok, Russia
| | | | - I V Seryodkin
- Pacific Geographical Institute FEB RAS, Vladivostok, Russia
| | | | - E A Vakh
- Far Eastern Federal University, Vladivostok, Russia
- Pacific Oceanological Institute FEB RAS, Vladivostok, Russia
| | | | | | - R A Makarevich
- Pacific Geographical Institute FEB RAS, Vladivostok, Russia
| | - T N Lutsenko
- Pacific Geographical Institute FEB RAS, Vladivostok, Russia
| | - N Yu Popov
- Far East Geological Institute FEB RAS, Vladivostok, Russia
| | - A V Ruslan
- Far East Geological Institute FEB RAS, Vladivostok, Russia
| | - D S Ostapenko
- Far East Geological Institute FEB RAS, Vladivostok, Russia
| | - A V Vetoshkina
- Far East Geological Institute FEB RAS, Vladivostok, Russia
| | - V V Aramilev
- Pacific Geographical Institute FEB RAS, Vladivostok, Russia
| | - A S Kholodov
- Far East Geological Institute FEB RAS, Vladivostok, Russia
| | - K S Golokhvast
- Pacific Geographical Institute FEB RAS, Vladivostok, Russia.
- Far Eastern Federal University, Vladivostok, Russia.
- Siberian Federal Scientific Center of Agrobiotechnology RAS, Krasnoobsk, Russia.
| |
Collapse
|
4
|
Emerging Contaminants: Analysis, Aquatic Compartments and Water Pollution. EMERGING CONTAMINANTS VOL. 1 2021. [DOI: 10.1007/978-3-030-69079-3_1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
5
|
Panichev AM, Trepet SA, Chekryzhov IY, Seryodkin IV, Vakh EA, Makarevich RA, Eskina TG, Bibina KV, Stolyarova TA, Mitina EI, Ivanov VV, Ostapenko DS, Kholodov AS, Golokhvast KS. A study of kudurs used by wild animals located on the water sources high in REE content in the Caucasus Nature Reserve. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:91-112. [PMID: 32748302 DOI: 10.1007/s10653-020-00670-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 07/09/2020] [Indexed: 06/11/2023]
Abstract
One of the theories explaining the reasons for geophagy, which was proposed earlier by the authors of the article, consists in the assumption that animals need rare-earth elements (REE). In order to test this hypothesis, we studied the chemical composition of spring waters in the territory of the Caucasus Nature Reserve at three kudurs along the Achipsta River, as well as at the Mamaevsky kudur (southwestern slope of the Pshekish mountain). At the Mamaevsky kudur, we also studied the chemical composition of earth consumed by animals, and the species, age and gender composition, seasonal and daily activity of ungulate animals-visitors of the kudur. It was determined that the most active visitors of the Mamaevsky kudur were European bison (Bison bonasus) with one activity peak during the rut, in July. The frequency of visits to the kudur by red deer (Cervus elaphus) was 4 times lower with the highest peak activity in April and a lower peak in August. Only in one of four water sources at the Mamaevsky kudur there was an elevated concentration of Na (by 7 times). In the other three the concentration was comparable to the local river water. The waters of two "sodium-free" springs had increased concentrations of REE (by 5-8 times). Geophagic earths near the Mamaevsky springs are decomposition products of siltstone and sandstone shale rocks of the Jurassic age consisting of clay minerals (illite mixed with smectite, and chlorites)-from 42 to 45%, and quartz and feldspar (in total up to 50%) mixed with Fe and Ca carbonates. The chemical composition of acid extracts (0.1 N HCl, pH = 1.0) from consumed earth showed the highest extractability of Ca and Fe. In trace elements, Sr, Ba, Zn, Cu, Ni, Co, V, light lanthanides, and Y are most actively extracted. Na is extracted at 0.03-0.1 g/kg. The sodium bicarbonate spring water consumed by animals at kudurs on the Achipsta River had Na contents 70-300 times, and REE contents 25-40 times higher than that in the river water. The revealed facts do not contradict the hypothesis that the desire for geophagy in animals in the Caucasus (in addition to the long-known "urge" for Na) can be also related to the properties of lanthanides group elements exchange in the body.
Collapse
Affiliation(s)
- A M Panichev
- Pacific Geographical Institute, Far Eastern Branch of the Russian Academy of Sciences, 7 Radio St., Vladivostok, Russia, 690041
- Far Eastern Federal University, 8 Sukhanova St., Vladivostok, Russia, 690091
| | - S A Trepet
- Tembotov Institute of Ecology of Mountain Territories, Russian Academy of Sciences, 37A Inessa Armand St., Nalchik, Russia, 360000
| | - I Yu Chekryzhov
- Far Eastern Federal University, 8 Sukhanova St., Vladivostok, Russia, 690091
- Far East Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, 159 100-Letiya Vladivostoku St., Vladivostok, Russia, 690022
| | - I V Seryodkin
- Pacific Geographical Institute, Far Eastern Branch of the Russian Academy of Sciences, 7 Radio St., Vladivostok, Russia, 690041
- Far Eastern Federal University, 8 Sukhanova St., Vladivostok, Russia, 690091
| | - E A Vakh
- Far Eastern Federal University, 8 Sukhanova St., Vladivostok, Russia, 690091
- Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences, 43 Baltic St., Vladivostok, Russia, 690041
| | - R A Makarevich
- Pacific Geographical Institute, Far Eastern Branch of the Russian Academy of Sciences, 7 Radio St., Vladivostok, Russia, 690041
| | - T G Eskina
- Caucasus Nature Reserve, 8 Karla Marksa St., Sochi, Russia, 354340
| | - K V Bibina
- Caucasus Nature Reserve, 8 Karla Marksa St., Sochi, Russia, 354340
| | - T A Stolyarova
- Lomonosov Moscow State University, 1 Leninskiye Gory, Moscow, Russia, 119991
| | - E I Mitina
- Lomonosov Moscow State University, 1 Leninskiye Gory, Moscow, Russia, 119991
| | - V V Ivanov
- Far East Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, 159 100-Letiya Vladivostoku St., Vladivostok, Russia, 690022
| | - D S Ostapenko
- Far East Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, 159 100-Letiya Vladivostoku St., Vladivostok, Russia, 690022
| | - A S Kholodov
- Far Eastern Federal University, 8 Sukhanova St., Vladivostok, Russia, 690091
- Far East Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, 159 100-Letiya Vladivostoku St., Vladivostok, Russia, 690022
| | - K S Golokhvast
- Pacific Geographical Institute, Far Eastern Branch of the Russian Academy of Sciences, 7 Radio St., Vladivostok, Russia, 690041.
- Far Eastern Federal University, 8 Sukhanova St., Vladivostok, Russia, 690091.
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources (VIR), 42, 44 Bolshaya Morskaya St., St. Petersburgh, Russia, 190121.
| |
Collapse
|
6
|
Diversity, Abundance, and Some Characteristics of Bacteria Isolated from Earth Material Consumed by Wild Animals at Kudurs in the Sikhote-Alin Mountains, Russia. Int J Microbiol 2020; 2020:8811047. [PMID: 33488723 PMCID: PMC7803285 DOI: 10.1155/2020/8811047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/20/2020] [Accepted: 11/25/2020] [Indexed: 11/29/2022] Open
Abstract
In this work, geochemical and microbiological studies were performed at kudurs in the southeastern part of the Sikhote-Alin mountain range and in the Sikhote-Alin Nature Reserve located in Primorsky Krai, Russia. It was found that the earth material eaten by wild animals in both sites is represented by clay-zeolite tuffs of dacite-rhyolite composition. In the earth material, Na is predominant in bioavailable macronutrients and Zn, light lanthanides, and Y in trace elements. Microbiological studies of geophagic earths revealed a wide range of heterotrophic and autotrophic aerobes and anaerobes involved in the conversion of carbon, nitrogen, and sulfur. Iron- and manganese-oxidizing bacteria and silicate bacteria were identified as well. The isolated pure cultures of heterotrophic bacteria were represented mainly by Gram-positive spore-forming large rods of Bacillus sp. and Gram-negative heterotrophic aerobic and facultative anaerobic microorganisms Burkholderia sp. and Microvirgula aerodenitrificans, which oxidize iron and reduce sulfate. The ability of the bacteria M. aerodenitrificans to reduce sulfates is shown for the first time. According to the literature, the isolated microorganisms are able to actively extract rare earth elements from earth materials, transforming them from the bioinert state to a state accessible to herbivorous mammals.
Collapse
|
7
|
Prabakaran S, Rajan M, Lv C, Meng G. Lanthanides-Substituted Hydroxyapatite/ Aloe vera Composite Coated Titanium Plate for Bone Tissue Regeneration. Int J Nanomedicine 2020; 15:8261-8279. [PMID: 33149574 PMCID: PMC7603079 DOI: 10.2147/ijn.s267632] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 09/12/2020] [Indexed: 12/25/2022] Open
Abstract
PURPOSE To develop the surface-treated metal implant with highly encouraged positive properties, including high anti-corrosiveness, bio-activeness and bio-compatibleness for orthopedic applications. METHODS In this work, the surface of commercially pure titanium (Ti) metal was treated with bio-compatible polydopamine (PD) by merely immersing the Ti plate in PD solution. The composite of trivalent lanthanide minerals (La3+, Ce3+ and Gd3+)-substituted hydroxyapatite (MHAP) with Aloe vera (AV) gel was prepared and coated on the PD-Ti plate by electrophoretic deposition (EPD) method. The choice of trivalent lanthanide ions is based on their bio-compatible nature and bone-seeking properties. The formation of the PD layer, composites, and composite coatings on Ti plate and PD-Ti surface was confirmed by FT-IR, XRD, SEM and HR-TEM observations. In-vitro assessments such as osteoblasts like MG-63 cell viability, alkaline phosphatase activity and mineralization ability of the MHAP/AV composite were tested, and the composite-coated plate was implanted into a rat bone defect model for in-vivo bone regeneration studies. RESULTS The coating ability of the MHAP/AV composite was highly preferred to PD-treated Ti plate than an untreated Ti plate due to the metal absorption ability of PD. This was confirmed by SEM analysis. The in-vitro and in-vivo studies show the better osteogenic ability of MHAP/AV composite at 14th day and 4th week of an experimental period, respectively. CONCLUSION The osteoblast ability of the fabricated device without producing any adverse effect in the rat model recommends that the fabricated device would serve as a better platform on the hard tissue regeneration for load-bearing applications of orthopedics.
Collapse
Affiliation(s)
- Selvakani Prabakaran
- Biomaterials in Medicinal Chemistry Laboratory, Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai625021, India
| | - Mariappan Rajan
- Biomaterials in Medicinal Chemistry Laboratory, Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai625021, India
| | - Changwei Lv
- Department of Orthopaedics, The Affiliated Hospital of Northwest University, Xi’an No.3 Hospital, Xi’an710018, Mainland China
| | - Guolin Meng
- Orthopaedic Department of Xijing Hospital of the Fourth Military Medical University, Xi’an, Shaanxi, 710032, Mainland China
| |
Collapse
|
8
|
The Effects of the Metal Ion Substitution into the Active Site of Metalloenzymes: A Theoretical Insight on Some Selected Cases. Catalysts 2020. [DOI: 10.3390/catal10091038] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
A large number of enzymes need a metal ion to express their catalytic activity. Among the different roles that metal ions can play in the catalytic event, the most common are their ability to orient the substrate correctly for the reaction, to exchange electrons in redox reactions, to stabilize negative charges. In many reactions catalyzed by metal ions, they behave like the proton, essentially as Lewis acids but are often more effective than the proton because they can be present at high concentrations at neutral pH. In an attempt to adapt to drastic environmental conditions, enzymes can take advantage of the presence of many metal species in addition to those defined as native and still be active. In fact, today we know enzymes that contain essential bulk, trace, and ultra-trace elements. In this work, we report theoretical results obtained for three different enzymes each of which contains different metal ions, trying to highlight any differences in their working mechanism as a function of the replacement of the metal center at the active site.
Collapse
|
9
|
Wieszczycka K, Staszak K, Woźniak-Budych MJ, Jurga S. Lanthanides and tissue engineering strategies for bone regeneration. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.03.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
10
|
Adeel M, Lee JY, Zain M, Rizwan M, Nawab A, Ahmad MA, Shafiq M, Yi H, Jilani G, Javed R, Horton R, Rui Y, Tsang DCW, Xing B. Cryptic footprints of rare earth elements on natural resources and living organisms. ENVIRONMENT INTERNATIONAL 2019; 127:785-800. [PMID: 31039528 DOI: 10.1016/j.envint.2019.03.022] [Citation(s) in RCA: 116] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 03/09/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Rare earth elements (REEs) are gaining attention due to rapid rise of modern industries and technological developments in their usage and residual fingerprinting. Cryptic entry of REEs in the natural resources and environment is significant; therefore, life on earth is prone to their nasty effects. Scientific sectors have expressed concerns over the entry of REEs into food chains, which ultimately influences their intake and metabolism in the living organisms. OBJECTIVES Extensive scientific collections and intensive look in to the latest explorations agglomerated in this document aim to depict the distribution of REEs in soil, sediments, surface waters and groundwater possibly around the globe. Furthermore, it draws attention towards potential risks of intensive industrialization and modern agriculture to the exposure of REEs, and their effects on living organisms. It also draws links of REEs usage and their footprints in natural resources with the major food chains involving plants, animals and humans. METHODS Scientific literature preferably spanning over the last five years was obtained online from the MEDLINE and other sources publishing the latest studies on REEs distribution, properties, usage, cycling and intrusion in the environment and food-chains. Distribution of REEs in agricultural soils, sediments, surface and ground water was drawn on the global map, together with transport pathways of REEs and their cycling in the natural resources. RESULTS Fourteen REEs (Ce, Dy, Er, Eu, Gd, Ho, La, Lu, Nd, Pr, Sm, Tb, Th and Yb) were plighted in this study. Wide range of their concentrations has been detected in agricultural soils (<15.9-249.1 μg g-1) and in groundwater (<3.1-146.2 μg L-1) at various sites worldwide. They have strong tendency to accumulate in the human body, and thus associated with kidney stones. The REEs could also perturb the animal physiology, especially affecting the reproductive development in both terrestrial and aquatic animals. In plants, REEs might affect the germination, root and shoot development and flowering at concentration ranging from 0.4 to 150 mg kg-1. CONCLUSIONS This review article precisely narrates the current status, sources, and potential effects of REEs on plants, animals, humans health. There are also a few examples where REEs have been used to benefit human health. However, still there is scarce information about threshold levels of REEs in the soil, aquatic, and terrestrial resources as well as living entities. Therefore, an aggressive effort is required for global action to generate more data on REEs. This implies we prescribe an urgent need for inter-disciplinary studies about REEs in order to identify their toxic effects on both ecosystems and organisms.
Collapse
Affiliation(s)
- Muhammad Adeel
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, PR China
| | - Jie Yinn Lee
- Institute for Tropical Biology and Conservation (ITBC), University of Malaysia Sabah, Kota Kinabalu, Sabah 88400, Malaysia
| | - Muhammad Zain
- Key Laboratory of Crop Water Use and Regulation, Ministry of Agriculture and Rural Affairs, Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Xinxiang, Henan 453003, PR China
| | - Muhammad Rizwan
- Microelement research center, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Aamir Nawab
- Department of Animal Science, College of Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, PR China
| | - M A Ahmad
- Key Lab of Eco-restoration of Regional Contaminated Environment (Shenyang University), Ministry of Education, Shenyang 11044, PR China
| | - Muhammad Shafiq
- Faculty of biological and agricultural sciences, University of Colima, Mexico
| | - Hao Yi
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, PR China
| | - Ghulam Jilani
- Insititute of Soil Science and SWC, PMAS Arid Agriculture University Rawalpindi, Rawalpindi, Pakistan
| | - Rabia Javed
- Department of Multidisciplinary Studies, National University of Medical Sciences, Rawalpindi 46000, Pakistan
| | - R Horton
- Department of Agronomy, Iowa State University, Ames, IA 50011, USA
| | - Yukui Rui
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, PR China.
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts Amherst, MA 01003, USA
| |
Collapse
|
11
|
Effect of Multivalent Cations on Intermolecular Association of Isotactic and Atactic Poly(Methacrylic Acid) Chains in Aqueous Solutions. Polymers (Basel) 2019; 11:polym11040605. [PMID: 30960589 PMCID: PMC6523823 DOI: 10.3390/polym11040605] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 03/22/2019] [Accepted: 03/26/2019] [Indexed: 11/18/2022] Open
Abstract
The formation of nanoparticles of two poly(methacrylic acid) (PMA) isomers, atactic (aPMA) and isotactic (iPMA), was investigated in aqueous solutions in the presence of mono- (Na+) and multivalent cations (Mg2+ and La3+). Using dynamic (DLS) and static light scattering (SLS), we show that PMA nanoparticles have characteristics of microgel-like particles with a denser core and a swollen corona. iPMA aggregates are stable at a much higher degree of neutralization (αN) than the aPMA ones, indicating a much stronger association between iPMA chains. This is explained by proposing segregation of ionized and unionized carboxyl groups within the iPMA aggregates and subsequent cooperative hydrogen-bonding between COOH groups. The calculated shape parameter (ρ) suggests different behavior of both isomers in the presence of Mg2+ ions on one hand and Na+ and La3+ on the other. The microgel-like particles formed in the presence of Mg2+ ions have a more even mass distribution (possibly a no core-shell structure) in comparison with those in the presence of Na+ and La3+ ions. Differences between the aggregate structures in the presence of different ions are reflected also in calorimetric experiments and supported by pH and fluorimetric measurements. Reasons for different behavior in the presence of Mg2+ ions lie in specific properties of this cation, in particular in its strong hydration and preference towards monodentate binding to carboxylate groups.
Collapse
|
12
|
Colim AN, do Nascimento PC, Wiethan BA, Adolfo FR, Dresch LC, de Carvalho LM, Bohrer D, da Rosa MB. Reversed-Phase High-Performance Liquid Chromatography for the Determination of 15 Rare Earth Elements in Surface Water Sample Collected in a Mining Area from Lavras do Sul/RS, Brazil. Chromatographia 2019. [DOI: 10.1007/s10337-019-03709-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
13
|
Marino T, Prejanò M, Russo N. How Metal Coordination in the Ca-, Ce-, and Eu-Containing Methanol Dehydrogenase Enzymes Can Influence the Catalysis: A Theoretical Point of View. TRANSITION METALS IN COORDINATION ENVIRONMENTS 2019. [DOI: 10.1007/978-3-030-11714-6_16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
14
|
Preparation of Chitosan microspheres containing 166Dy/166Ho in vivo generators and their theranostic potential. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-5984-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
15
|
Panichev AM, Seryodkin IV, Kalinkin YN, Makarevich RA, Stolyarova TA, Sergievich AA, Khoroshikh PP. Development of the "rare-earth" hypothesis to explain the reasons of geophagy in Teletskoye Lake are kudurs (Gorny Altai, Russia). ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2018; 40:1299-1316. [PMID: 29256021 DOI: 10.1007/s10653-017-0056-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 12/12/2017] [Indexed: 06/07/2023]
Abstract
The mineral and chemical composition of the liquid and lithogenous substances, consumed by the wild ungulate animals, at the kudurs of the Teletskoye Lake, Gorny Altai, Russia, was studied. It was investigated that all examined kudurits are argillous-aleurolitic and get in the interval from 1 to 100 μm with the predominance of the fraction 10 μm. By the mineral composition, the lithogenous kudurits present the quartz-feldspathic-hydromicaceous-chloritic mineral formations with the large content of the quartz particles (20-43%) and sodium-containing plagioclases (albite, 15-32 wt%). The lithogenous kudurits are the products of the reconstitution of the metamorphic cleaving stones as a result of the glacier abrasive effect, subsequent its aqueous deposits and then eolation in the subaerial conditions. The fontinal waters consumed at the kudurs are subsaline chloride-hydrocarbonate-sodium and sulphated-hydrocarbonate-calcium types. It essentially differs by the increased content of rare-earth elements in reference to the lake water. The acid (HCl, pH-1) extracts from the kudurits more actively extract calcium (10-35% of the gross contents; sodium extracts at the level of 1-3%). The most fluent in the microelements composition are Cu, Be, Sr, Co, Cd, Pb, Sc, Y and rare-earth elements. The transit of all these elements into the dissoluted form fluctuates about 10% from the gross contents. The reason of geophagy is related to tendency of herbivores to absorb mineralized subsoils enriched by the biologically accessible forms of rare-earth elements, arisen as a result of vital activity of specific microflora.
Collapse
Affiliation(s)
- Alexander M Panichev
- Pacific Geographical Institute, Far Eastern Branch of the Russian Academy of Sciences, 7 Radio St, Vladivostok, Russia, 690041
- Far Eastern Federal University, 8 Sukhanova St, Vladivostok, Russia, 690091
| | - Ivan V Seryodkin
- Pacific Geographical Institute, Far Eastern Branch of the Russian Academy of Sciences, 7 Radio St, Vladivostok, Russia, 690041.
- Far Eastern Federal University, 8 Sukhanova St, Vladivostok, Russia, 690091.
| | - Yuri N Kalinkin
- Altai State Nature Biosphere Reserve, 1 Naberezhny Pereulok, Gorno-Altaisk, Russia, 649000
| | - Raisa A Makarevich
- Pacific Geographical Institute, Far Eastern Branch of the Russian Academy of Sciences, 7 Radio St, Vladivostok, Russia, 690041
| | | | | | - Pavel P Khoroshikh
- Far Eastern Federal University, 8 Sukhanova St, Vladivostok, Russia, 690091
| |
Collapse
|
16
|
Prejanò M, Marino T, Russo N. How Can Methanol Dehydrogenase from Methylacidiphilum fumariolicum
Work with the Alien CeIII
Ion in the Active Center? A Theoretical Study. Chemistry 2017; 23:8652-8657. [DOI: 10.1002/chem.201700381] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Indexed: 01/27/2023]
Affiliation(s)
- Mario Prejanò
- Dipartimento di Chimica e Tecnologie Chimiche; Università della Calabria; 87036 Arcavacata di Rende (CS) Italy
| | - Tiziana Marino
- Dipartimento di Chimica e Tecnologie Chimiche; Università della Calabria; 87036 Arcavacata di Rende (CS) Italy
| | - Nino Russo
- Dipartimento di Chimica e Tecnologie Chimiche; Università della Calabria; 87036 Arcavacata di Rende (CS) Italy
| |
Collapse
|