Results 21 to 30 of about 1,310 (184)

Molybdenum-Containing Arsenite Oxidase of the Chemolithoautotrophic Arsenite Oxidizer NT-26 [PDF]

Journal of Bacteriology, 2004
ABSTRACT The chemolithoautotroph NT-26 oxidizes arsenite to arsenate by using a periplasmic arsenite oxidase. Purification and preliminary characterization of the enzyme revealed that it (i) contains two heterologous subunits, AroA (98 kDa) and AroB (14 kDa); (ii) has a native molecular mass of 219 kDa, suggesting an α
Joanne M, Santini, Rachel N, vanden Hoven   +1 more
openaire   +2 more sources

Synthesis, reactivity and structures of cyclic arsenites with an N⃗AS bond

, 1999
Synthesis and X-ray Structures of the cyclic arsenites (NC9H6O)AS(2,2'-OC6H4-C6H4O) (1) and (NC9H6O)As[(O-2,4-(t-bu)2C6H2)2CH2] (2) are described. Compound 1 crystallizes in the monoclinic space group P21 with α = 10.469 (7)Å, b = 7.
Kumara Swamy, K. C., Veith, Michael, Huch, V., Saida, Musa A.   +3 more
core   +1 more source

Zero-Valent Iron Nanoparticles Reduce Arsenites and Arsenates to As(0) Firmly Embedded in Core–Shell Superstructure: Challenging Strategy of Arsenic Treatment under Anoxic Conditions

, 2017
Arsenites and arsenates are carcinogenic to humans and are typically removed from contaminated water using various sorbents. However, these treatment methods result in the secondary release of weakly bound As species and require large amounts of sorbents.
Jan Kolařík (1654561), Jan Filip (1654552), Robert Prucek (609971), Jiří Tuček (1654555), Giorgio Zoppellaro (143038), Martin Petr (1356609), Radek Zbořil (1282515), Virender K. Sharma (1291866)   +7 more
core   +1 more source

Natural Products as Modulators of ABC Transporters in Breast Cancer

Phytotherapy Research, EarlyView.
ABSTRACT Breast cancer remains a significant global health challenge, with high incidence and mortality rates despite advancements in early detection and treatment. Multidrug resistance (MDR), particularly in aggressive subtypes like triple‐negative breast cancer (TNBC), continues to hinder effective therapy.
Yoganishalini Sagadevan, Reyhaneh Farghadani, Ammu K. Radhakrishnan   +2 more
wiley   +1 more source

Nanomaterials' Multigenerational Effects by Single and Joint Exposure in Non‐mammalian Models

Environmental Toxicology, EarlyView.
ABSTRACT Nanotoxicology has mainly focused on single‐generation studies, leaving multigenerational toxicity underexplored. Having animal welfare recently gained importance, we aimed to provide the state‐of‐the‐art of knowledge about multigenerational effects in non‐mammalian models in the case of nanomaterials (NM) single and joint exposure to other ...
Andy Joel Taipe Huisa, Analía Ale, Azael Francisco Silva Neto, Lorena De Mendonça Lucena, Marcelo Estrella Josende, Milena Ferreira de Lima, Rhayanny Kethylly Pereira Santos, Martín Federico Desimone, Priscila Gubert, José María Monserrat   +9 more
wiley   +1 more source

Exploring Interactive Effects of Arsenic and Selenium Exposure on Larval Zebrafish (Danio rerio)

Environmental Toxicology, EarlyView.
ABSTRACT Arsenic contamination in aquatic ecosystems is a major environmental concern. Selenium (Se) helps mitigate oxidative stress and hence could reduce the toxic effects of arsenic. However, Se can also be toxic at high concentrations. Given that these metalloids commonly co‐occur in the environment, there is a pressing need for further research ...
Owen Luo, Jinnath Rehana Ritu, Md Helal Uddin, Sravan Kumar Putnala, Mahesh Rachamalla, Som Niyogi, Douglas P. Chivers   +6 more
wiley   +1 more source

Synergistic Toxicity of Low‐Concentration Metal Mixture on Male Rats: Reproductive, Renal, and Hepatic Effects

Environmental Toxicology, EarlyView.
ABSTRACT Mining plays a crucial role in economic development, but improper management can lead to severe environmental degradation. Particularly for iron ore, mining generates vast amounts of tailings often stored in unstable dams. This study aims to investigate the toxicological impacts of environmentally relevant concentrations of metals mixture ...
Kalinka Helóra Gomes de Almeida, Thalita Tofanin Sargiani D'Assumpção, Ana Priscila Gomes Silva, Carolina Rocha Moreira de Oliveira, Tailisi Hoppe Trevizani, Rubens Cesar Lopes Figueira, Lucas Buruaem Moreira, Juliana Elaine Perobelli   +7 more
wiley   +1 more source

Arsenite accumulation in the mouse eye [PDF]

Journal of Toxicology and Environmental Health, Part A, 2016
Elevated arsenic (As) concentrations in drinking water are a major worldwide public health concern. Exposure to As is associated with carcinogenesis, skin lesions, cardiovascular disease, cognitive deficits, and other disorders. However, little is known regarding chronic As-mediated effects on the eye.
Norman J, Kleiman, Adrienne M, Quinn, Kara G, Fields, Vesna, Slavkovich, Joseph H, Graziano   +4 more
openaire   +2 more sources

Multielemental Analysis in Rice Grains by Total Reflection X‐Ray Fluorescence

X-Ray Spectrometry, EarlyView.
ABSTRACT Rice (Oryza sativa) is a staple food cultivated worldwide and represents a significant source of essential nutrients for humans. However, this cereal may also contain potentially toxic elements including chromium, arsenic, and lead typically present at trace concentrations (ng.g−1).
F. T. S. Tsuyama, R. G. Leitão, C. G. L. Canellas, G. C. Ferreira, J. L. Pereira, R. S. Santos, J. T. Assis, D. F. Oliveira, M. J. Anjos   +8 more
wiley   +1 more source

Diagram Reasoning and Paraconsistent Thinking: Hieromonk Hierotheos, His Ancestry, and Legacy

, 2022
The article is dedicated to the use of logical diagrams in Byzantine Trinitarian theology. Logical diagrams are a kind of logical computation that is often considered to originate with Euler and Leibniz, but they were, in fact, used by Byzantine ...
Basil Lourié, Lourié, Basil
core   +1 more source