8,193 results match your criteria antimony

Phosphine-Stabilized Pnictinidenes.

Chemistry 2021 Jul 22. Epub 2021 Jul 22.

Eberhard Karls Universität Tübingen Universitätsbibliothek: Eberhard Karls Universitat Tubingen, Chemistry, GERMANY.

Reaction of the intramolecular germylene-phosphine Lewis pair (o-PPh 2 )C 6 H 4 GeAr* ( 1 ) with Group 15 element trichlorides ECl 3 (E = P, As, Sb) was investigated. After oxidative addition, reduction of the resulting compounds ( o -PPh 2 )C 6 H 4 (Ar*)Ge(Cl)ECl 2 ( 2: E = P, 3 : E = As, 4 : E = Sb) was carried out using sodium metal or LiHBEt 3 . The molecular structures of the phosphine stabilized phosphinidene ( o -PPh 2 )C 6 H 4 (Ar*)Ge(Cl)P ( 5 ), arsinidene ( o -PPh 2 )C 6 H 4 (Ar*)Ge(Cl)As ( 6 ) and stibinidene ( o -PPh 2 )C 6 H 4 (Ar*)Ge(Cl)Sb ( 7 ) are presented, featuring a two-coordinate low valent group 15 element. Read More

View Article and Full-Text PDF

Linear and Nonlinear Optical Properties of Centrosymmetric SbOSO and Noncentrosymmetric SbO(SO)(OH) Induced by Lone Pair Stereoactivity.

Inorg Chem 2021 Jul 21. Epub 2021 Jul 21.

College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong 266071, P. R. China.

Introducing stereochemically active lone-pair Sb cations into sulfates, two three-dimensional (3D) antimony-sulfates, SbOSO () and SbO(SO)(OH) (), were achieved under moderate hydrothermal conditions. Both structures are constructed by tetranuclear-{Sb}-clusters-based layers and SO tetrahedra. However, owing to the different packing patterns of the layers, they display different characteristics: exhibits a centrosymmetric structure while possesses a noncentrosymmetric structure. Read More

View Article and Full-Text PDF

Successful treatment of diffuse cutaneous leishmaniasis caused by Leishmania amazonensis.

An Bras Dermatol 2021 Jul 14. Epub 2021 Jul 14.

Hospital Universitário de Brasília, Universidade de Brasília, Brasília, DF, Brazil.

Diffuse cutaneous leishmaniasis is a rare universal disease associated with an inadequate host cell immune response, caused by different species: infantum, aethiopica, major, mexicana, and others, which presents the challenge of a poor therapeutic response. In Brazil, it is caused by L. amazonensis. Read More

View Article and Full-Text PDF

Antimony resistance associated with persistence of Leishmania (Leishmania) infantum infection in macrophages.

Parasitol Res 2021 Jul 17. Epub 2021 Jul 17.

Health Sciences Graduate Program, Federal University of Sergipe, Aracaju, Brazil.

Visceral leishmaniasis is a severe disease caused by protozoan parasites that include Leishmania (L.) infantum. The disease is established when parasites subvert the immune response of the host. Read More

View Article and Full-Text PDF

Involvement of nitric oxide (NO) in plant responses to metalloids.

J Hazard Mater 2021 Jul 7;420:126606. Epub 2021 Jul 7.

Department of Plant Biology, University of Szeged, H6726 Szeged Közép fasor 52., Hungary.

Plants respond to the limited or excess supply of metalloids, boron (B), silicon (Si), selenium (Se), arsenic (As), and antimony (Sb) via complex signaling pathways that are mainly regulated by nitric oxide (NO). The absorption of metalloids from the soil is facilitated by pathways that involve aquaporins, aquaglyceroporins, phosphate, and sulfate transporters; however, their regulation by NO is poorly understood. Using in silico software, we predicted the S-nitrosation of known metalloid transporters, proposing NO-dependent regulation of metalloid transport systems at the posttranslational level. Read More

View Article and Full-Text PDF

Evaluating the metabolic functional profiles of the microbial community and alfalfa (Medicago sativa) traits affected by the presence of carbon nanotubes and antimony in drained and waterlogged sediments.

J Hazard Mater 2021 Jul 7;420:126593. Epub 2021 Jul 7.

Hunan Ecological and Environmental Affairs Center, Changsha 410082, PR China.

Antimony (Sb) is the ubiquitous re-emerging contaminant greatly accumulated in sediments which has been revealed risky to ecological environment. However, the impacts of Sb (III/V) on microbes and plants in sediments, under different water management with presence of engineering materials are poorly understood. This study conducted sequential incubation of sediments (flooding, draining and planting) with presence of multiwall carbon nanotubes (MWCNTs) and Sb to explore the influence on microbial functional diversity, Sb accumulation and alfalfa traits. Read More

View Article and Full-Text PDF

Synergistic Effect of Chemical Substitution and Insertion on the Thermoelectric Performance of CuVGeS Colusite.

Inorg Chem 2021 Jul 16. Epub 2021 Jul 16.

Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan.

Copper-based sulfides are promising materials for thermoelectric applications, which can convert waste heat into electricity. This study reports the enhanced thermoelectric performance of CuVGeS colusite substitution of antimony (Sb) for germanium (Ge) and introduction of copper (Cu) as an interstitial atom. The crystal structure of the solid solutions and Cu-rich compounds were analyzed by powder X-ray diffraction and scanning transmission electron microscopy. Read More

View Article and Full-Text PDF

Metals and Breast Cancer Risk: A Prospective Study Using Toenail Biomarkers.

Am J Epidemiol 2021 Jul 15. Epub 2021 Jul 15.

Epidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA.

The role of metals in breast cancer is of interest because of their carcinogenic and endocrine disrupting capabilities. Evidence from epidemiologic studies remains elusive and prior studies have not investigated metal mixtures. In a case-cohort nested within the Sister Study cohort (enrolled 2003-2009; followed through September 2017), we measured 15 metals in toenails collected at enrollment in a race-stratified sample of 1495 cases and a sub-cohort of 1605 women. Read More

View Article and Full-Text PDF

Downregulation of FeSOD-A expression in Leishmania infantum alters trivalent antimony and miltefosine susceptibility.

Parasit Vectors 2021 Jul 15;14(1):366. Epub 2021 Jul 15.

Grupo de Genômica Funcional de Parasitos (GFP), Instituto René Rachou, Fiocruz Minas, Avenida Augusto de Lima 1715, Belo Horizonte, MG, CEP: 30190-002, Brazil.

Background: Superoxide dismutase (SOD), a central component of the antioxidant defence system of most organisms, removes excess superoxide anions by converting them to oxygen and hydrogen peroxide. As iron (Fe) SOD is absent in the human host, this enzyme is a promising molecular target for drug development against trypanosomatids.

Results: We obtained Leishmania infantum mutant clones with lower FeSOD-A expression and investigated their phenotypes. Read More

View Article and Full-Text PDF

P-block atomically dispersed antimony catalyst for highly efficient oxygen reduction reaction.

Angew Chem Int Ed Engl 2021 Jul 13. Epub 2021 Jul 13.

Key Laboratory of Advanced Energy Materials Chemistry, College of Chemistry, Weijin Road 94, 300071, Tianjin, CHINA.

Main-group ( s - and p -block) metals are generally regarded as catalytically inactive due to the delocalized s / p -band. Herein, we successfully synthesized a p -block antimony single-atom catalyst (Sb SAC) with the Sb-N 4 configuration for efficient catalysis of the oxygen reduction reaction (ORR). The resulting Sb SAC exhibits superior ORR activity with a half-wave potential of 0. Read More

View Article and Full-Text PDF

Reduced graphene oxide (rGO) aerogel: Efficient adsorbent for the elimination of antimony (III) and (V) from wastewater.

J Hazard Mater 2021 Jul 1;420:126554. Epub 2021 Jul 1.

Environment and Sustainability Institute, University of Exeter, Penryn TR10 9FE, UK.

3D porous, thin sheet-like rGO aerogel was fabricated to explore its antimony (Sb) removal potential from wastewater. Langmuir isothermal and pseudo-second-order kinetic model best-suited the adsorption process. The maximum adsorption capacities were 168. Read More

View Article and Full-Text PDF

Response of antimony distribution in street dust to urban road traffic conditions.

J Environ Manage 2021 Jul 9;296:113219. Epub 2021 Jul 9.

State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, 19 Xinjiekouwai Street, Haidian District, Beijing, 100875, China. Electronic address:

Little is known about the relationship between traffic congestion and antimony (Sb) distribution in street dust, which is essential for Sb control and emission reduction in urban areas. Sb concentrations and mass load of the street dust collected in 19 cities of China were determined before investigating the mechanism of traffic influence on Sb distribution through diverse statistical means. The results showed that the Sb concentrations in each city were 1. Read More

View Article and Full-Text PDF

Serine proteases profiles of Leishmania (Viannia) braziliensis clinical isolates with distinct susceptibilities to antimony.

Sci Rep 2021 Jul 9;11(1):14234. Epub 2021 Jul 9.

Laboratório de Biologia Molecular e Doenças Endêmicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Avenida Brasil, 4365, Rio de Janeiro, RJ, CEP 21040-900, Brasil.

Glucantime (Sb) is the first-line treatment against American Tegumentary Leishmaniasis. Resistance cases to this drug have been reported and related to host characteristics and parasite phenotypes. In this study, 12 Leishmania (Viannia) braziliensis isolates from patients that presented clinical cure (Responders-R) and relapse or therapeutic failure (Non-responders-NR) after treatment with antimony, were analyzed. Read More

View Article and Full-Text PDF

Light-Emitting 0D Hybrid Metal Halide (CHN)SbCl with Antimony Dimers.

Inorg Chem 2021 Jul 9. Epub 2021 Jul 9.

The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China.

Low-dimensional organic-inorganic metal halides (OIMHs), as emerging light-emitting materials, have aroused widespread attention owing to their unique structural tunability and photoelectric characteristics. OIMHs are also promising materials for optoelectronic equipment, light-emitting diodes, and photodetectors. In this study, (CHN)SbCl (CHN is an -methylethylenediamine cation), a new zero-dimensional OIMH, has been reported, and (CHN)SbCl possesses a 2/ space group. Read More

View Article and Full-Text PDF

Cation-Disordered O3-NaNiSbO Cathode for High-Voltage Sodium-Ion Batteries.

ACS Appl Mater Interfaces 2021 Jul 9;13(28):32948-32956. Epub 2021 Jul 9.

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.

O3-type sodium-layered oxides (such as antimony-based O3 structures) have been suggested as one of the most fascinating cathode materials for sodium-ion batteries (SIBs). Honeycomb-ordered antimony-based O3 structures, however, unsatisfactorily exhibit complex phase transitions and sluggish Na kinetics during cycling. Herein, we prepared a completely cationic-disordered O3-type NaNiSbO compound by composition regulation for SIBs. Read More

View Article and Full-Text PDF

Visible and infrared optical modulation of PSLC smart films doped with ATO nanoparticles.

Dalton Trans 2021 Jul 6. Epub 2021 Jul 6.

National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin 150080, P. R. China. and Key Laboratory of Micro-systems and Micro-structures Manufacturing, Ministry of Education, Harbin 150080, P. R. China.

In recent years, smart windows have been gradually applied and developed in the fields of environmental protection, energy management, smart camouflage and display. With the continuous upgrading of market demand, smart windows with both visible and infrared band modulation functions are the future development trends. However, the optical modulation of smart windows is usually limited in the visible light band (380-780 nm). Read More

View Article and Full-Text PDF

The Effects of Gunshot Residue Components (Pb, Ba, and Sb) on the Life History Traits of Lucilia sericata (Diptera: Calliphoridae).

J Med Entomol 2021 Jul 7. Epub 2021 Jul 7.

Department of Forensic Science, Ondokuz Mayıs University, Institute of Science, Samsun, Turkey.

The present study aimed to investigate the impact of gunshot residue (GSR) components (Pb, Sb, and Ba) on the life history parameters of Lucilia sericata (Meigen, 1826) (Diptera: Calliphoridae). This experiment was carried out at the Zoology Department, the Ondokuz Mayıs University in 2020. About 50 larvae, respectively were exposed to the chicken liver with four different concentrations of GSR particles and life history parameters recorded. Read More

View Article and Full-Text PDF

Antimonate Controls Manganese(II)-Induced Transformation of Birnessite at a Circumneutral pH.

Environ Sci Technol 2021 Jul 6;55(14):9854-9863. Epub 2021 Jul 6.

Southern Cross GeoScience, Southern Cross University, Lismore, NSW 2480, Australia.

Manganese (Mn) oxides, such as birnessite (δ-MnO), are ubiquitous mineral phases in soils and sediments that can interact strongly with antimony (Sb). The reaction between birnessite and aqueous Mn(II) can induce the formation of secondary Mn oxides. Here, we studied to what extent different loadings of antimonate (herein termed Sb(V)) sorbed to birnessite determine the products formed during Mn(II)-induced transformation (at pH 7. Read More

View Article and Full-Text PDF

Influence of the solvent on the Lewis acidity of antimony pentahalides and group 13 Lewis acids toward acetonitrile and pyridine.

J Comput Chem 2021 Jul 5. Epub 2021 Jul 5.

Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russian Federation.

Energetic effects of solvation of SbF , SbCl , and 21 group 13 Lewis acids (LA) and their molecular complexes with acetonitrile and pyridine are evaluated using SMD approach. Compared to the gas phase, solvation increases the stability of boron- and aluminum-containing complexes but decreases the stability of gallium and indium-containing homologs due to larger solation energies of free LA. New Lewis acidity scales, based on the Gibbs energy of dissociation of the molecular complexes LA·pyridine and LA·acetonitrile in the gas phase, in benzene and acetonitrile solutions, are proposed. Read More

View Article and Full-Text PDF

Metal determination and biochemical status of marine fishes facilitate the biomonitoring of marine pollution.

Mar Pollut Bull 2021 Jul 1;170:112682. Epub 2021 Jul 1.

ICAR-National Institute of Abiotic Stress Management, Baramati, Maharashtra 413115, India.

In the present study, the bioaccumulation of chromium, manganese, cobalt, copper, zinc, selenium, arsenic, strontium, cadmium, tin, antimony and lead in tissues of thirty marine fish species collected from New Ferry Whorf, Sassoon dock and Versova fishing harbour in Mumbai, India, were analysed. The bioaccumulation patterns of these twelve elements were determined to assess pollution biomarkers based on cellular and oxidative stresses. Catalase, superoxide dismutase and glutathione-s-transferase, glycolytic enzymes viz. Read More

View Article and Full-Text PDF

[Contamination Characteristics of Surface Runoff in Densely Populated Areas in Downstream Yangtze River, China].

Huan Jing Ke Xue 2021 Jul;42(7):3304-3315

Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.

Urban surface runoff is an important non-point pollution source, and research on contamination characteristics of runoff is urgent for improving urban aquatic environment quality. Typical cities along the downstream Yangtze River, Wuxi and Nanjing, were selected in this study, and runoff samples from various underlying surfaces were collected to investigate contamination characteristics of heavy metals and dissolved organic matter (DOM). The results indicated that the concentration of heavy metals have exceed water quality standards in underlying surfaces partly, the decreasing order of metal contaminations was Zn > Cu > Pb > Sb > Cd. Read More

View Article and Full-Text PDF

Modulation of Splenic B Cell Subsets during Experimental Infection in BALB/c Mice.

Pathogens 2021 Jun 29;10(7). Epub 2021 Jun 29.

CSIR-Indian Institute of Chemical Biology, Kolkata 700032, India.

Sodium antimonials are one of the major and common drugs used against visceral form leishmaniasis (VL). However, the development of drug resistance makes it difficult to manage this disease. Current work investigates the modulation of splenic B cells during experimental infection with antimony-sensitive and -resistant   infection. Read More

View Article and Full-Text PDF

Effect of Powder Heat Treatment on Chemical Composition and Thermoelectric Properties of Bismuth Antimony Telluride Alloys Fabricated by Combining Water Atomization and Spark Plasma Sintering.

Materials (Basel) 2021 Jun 1;14(11). Epub 2021 Jun 1.

Division of Advanced Materials Engineering, Institute for Rare Metals, Kongju National University, 275, Budae-dong, Cheonan City 330-717, Chungcheongnam-do, Korea.

In this work, Bi.Sb.Te materials were produced by an economically viable and time efficient water atomization process. Read More

View Article and Full-Text PDF

Toxic Elements in Traditional Kohl-Based Eye Cosmetics in Spanish and German Markets.

Int J Environ Res Public Health 2021 06 5;18(11). Epub 2021 Jun 5.

Grup de Recerca Infancia i Entorn (GRIE), Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain.

Kohl is a traditional cosmetic widely used in Asia and Africa. In recent years, demand for kohl-based eyelids and lipsticks has increased in Europe, linked to migratory phenomena of populations from these continents. Although the European legislation prohibits the use of heavy metals in cosmetics due to the harmful effects to human health, particularly to pregnant women and children, these elements are still present in certain products. Read More

View Article and Full-Text PDF

Nutritional Evaluation and Risk Assessment of the Exposure to Essential and Toxic Elements in Dogs and Cats through the Consumption of Pelleted Dry Food: How Important Is the Quality of the Feed?

Toxics 2021 Jun 5;9(6). Epub 2021 Jun 5.

Toxicology Unit, Research Institute of Biomedical and Health Sciences (IUIBS), Universidad de Las Palmas de Gran Canaria, Paseo Blas Cabrera Felipe s/n, 35016 Las Palmas, Spain.

Dry feed for pets lacks specific legislation regarding maximum residue limits for inorganic elements. The aim of the present study was to determine the content of 43 inorganic elements in dog and cat feed, studying whether there were differences according to the supposed quality of the food and performing the risk assessment for health. Thirty-one and thirty packages of pelleted dry food for cats and dogs, respectively, were analyzed. Read More

View Article and Full-Text PDF

The mutation G133D on Leishmania guyanensis AQP1 is highly destabilizing as revealed by molecular modeling and hypo-osmotic shock assay.

Biochim Biophys Acta Biomembr 2021 Jun 24;1863(10):183682. Epub 2021 Jun 24.

Biotechnology Applied to Pathogens Instituto René Rachou, Fundação Oswaldo Cruz (Fiocruz Minas), Av. Augusto de Lima, 1715, Belo Horizonte 30190-009, MG, Brazil. Electronic address:

The Leishmania aquaglyceroporin 1 (AQP1) plays an important role in osmoregulation and antimony (Sb) uptake, being determinant for resistance to antimony. We have previously demonstrated that G133D mutation on L. guyanensis AQP1 (LgAQP1) leads to reduced Sb uptake. Read More

View Article and Full-Text PDF

Arsenic and antimony co-induced nephrotoxicity via autophagy and pyroptosis through ROS-mediated pathway in vivo and in vitro.

Ecotoxicol Environ Saf 2021 Sep 21;221:112442. Epub 2021 Jun 21.

College of Veterinary Medicine, Key Laboratory of Animal Vaccine Development, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, China. Electronic address:

Arsenic (As) and antimony (Sb) are commonly accumulated environmental pollutants that often coexist in nature and cause serious widespread biological toxicity. To investigate the nephrotoxicity induced by As and Sb in detail, we explored the mechanism by which As and Sb cotreatment induced autophagy and pyroptosis in vivo and in vitro. In this study, mice were treated with 4 mg/kg arsenic trioxide (ATO) or/and 15 mg/kg antimony trichloride (SbCl) by intragastric intubation for 60 days. Read More

View Article and Full-Text PDF
September 2021

Antimony exposure promotes bladder tumor cell growth by inhibiting PINK1-Parkin-mediated mitophagy.

Ecotoxicol Environ Saf 2021 Sep 21;221:112420. Epub 2021 Jun 21.

Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China. Electronic address:

Antimony is one of the heavier pnictogens and is widely found in human food chains, water sources, and as an air pollutant. Recent years have seen steadily increasing concentrations of antimony in the ecological environment; critically, several studies have indicated that antimony might pose a tumorigenic risk factor in several cancers. Therefore, antimony toxicity has attracted increasing research attention, with the molecular mechanisms underlying suspected antimony-mediated tumor transformation of greatest interest. Read More

View Article and Full-Text PDF
September 2021

RbCuSbS: Quaternary Antimony-Rich Semiconductor Featuring a Three-Dimensional Open Framework and Exhibiting an Intriguing Photocurrent Response.

Inorg Chem 2021 Jul 24;60(13):9263-9267. Epub 2021 Jun 24.

Institute for Composites Science Innovation, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.

Metal-rich chalcogenides with unique network architectures are rare but are of considerable interest because of their intriguing physical properties. In this work, a novel quaternary thioantimonate, RbCuSbS, has been discovered by a facile surfactant-thermal reaction. It crystallizes monoclinic space group 1̅ (No. Read More

View Article and Full-Text PDF

Analysis of essential and non-essential trace elements in the organs of a mother-fetus pair of spotted seals (Phoca largha) from the Sea of Japan.

Environ Sci Pollut Res Int 2021 Jun 23. Epub 2021 Jun 23.

V.I. Il'ichev Pacific Oceanological Institute, Far Eastern Branch, Russian Academy of Sciences, ul. Baltiyskaya 43, Vladivostok, Russia, 690041.

Concentrations of 22 essential and non-essential trace elements (Be, Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Mo, Ag, Cd, Sb, Ba, Tl, Pb, Th, U, and Hg) were measured in the organs of a mother-fetus pair (at the last trimester of pregnancy) of spotted seals from the Sea of ​Japan. The concentrations of eleven elements are reported for the first time. Eight organs of the pair were examined: lungs, heart, liver, kidneys, intestines, spleen, muscles, and bones. Read More

View Article and Full-Text PDF