Coordination capabilities of bis-(2-pyridyl)amides in the field of divalent germanium, tin and lead compounds

2021 ◽  
Author(s):  
Jan Zechovský ◽  
Ondřej Mrózek ◽  
Maksim Samsonov ◽  
Roman Jambor ◽  
Aleš Růžička ◽  
...  
Keyword(s):  
Lead Compounds ◽  
Germanium Tin ◽  
Different Types

Bis-(2-pyridyl)amides show a rich coordination variability toward heavier tetrylenes including the formation of ate complexes with different types of lithium coordination.

Pool Cue Chalk: A Source of Environmental Lead

PEDIATRICS ◽  
1996 ◽  
Vol 97 (6) ◽  
pp. 916-917
Author(s):  
Mary Beth Miller ◽  
Steven C. Curry ◽  
Donald B. Kunkel ◽  
Patricia Arreola ◽  
Ernest Arvizu ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Lead Poisoning ◽  
Blood Lead ◽  
Lead Content ◽  
Elevated Blood ◽  
Childhood Lead Poisoning ◽  
Environmental Lead ◽  
Lead Compounds ◽  
Different Types ◽  
Coloring Agents

Lead compounds are used as coloring agents for numerous products. Two cases of children with elevated blood lead concentrations encountered by the authors suggested that pool cue chalk may serve as a source of environmental lead. The objective of this study was to determine lead content of various brands and colors of pool cue chalk. Atomic absorption analyses were conducted of 23 different types of pool cue chalk for lead content. Three of 23 types of pool cue chalk contained more than 7000 ppm (mg/kg) lead: one manufacturer's green and tangerine chalk and another manufacturer's green chalk. It was concluded that some brands of pool cue chalk contain relatively large amounts of lead and could contribute to childhood lead poisoning.

scholarly journals Structural Analogues of Lanosterol from Marine Organisms of the Class Asteroidea as Potential Inhibitors of Human and Candida albicans Lanosterol 14α-demethylases

2017 ◽  
Vol 12 (12) ◽  
pp. 1934578X1701201 ◽  
Author(s):  
Leonid A. Kaluzhskiy ◽  
Tatsiana V. Shkel ◽  
Natalia V. Ivanchina ◽  
Alla A. Kicha ◽  
Irina P. Grabovec ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Cytochromes P450 ◽  
Resonance Method ◽  
Spectrophotometric Titration ◽  
Marine Organisms ◽  
Lead Compounds ◽  
Selective Ligands ◽  
Competitive Inhibitors ◽  
Different Types ◽  
Potential Inhibitors

Lanosterol 14α-demethylases (hemoproteins of the cytochrome P450(51) family) are involved in biosynthesis of different membrane sterols, including animal cholesterol, fungal ergosterol and C24-modified plant and protozoa sterols. In this study we have investigated 10 structural analogs of lanosterol isolated from echinoderms belonging to the class Asteroidea as potential ligands (competitive inhibitors) of human and Candida albicans cytochromes P450(51). The study was performed using the surface plasmon resonance method, spectrophotometric titration and enzyme assay. Among the compounds tested we found several selective ligands for human and Candida albicans cytochromes. Between selective ligands of the human lanosterol 14α-demethylase we found two novel inhibitors of this enzyme: henricioside H1 and levisculoside G from Henricia derjugini. With due consideration of obtained data, we conclude that marine organisms from the class Asteroidea can be a valuable source of new lead compounds for creation of selective inhibitors of cytochromes P450(51) family with less side effects due to their selective action on these enzymes in different types of organisms.

O,N-Chelated germanium, tin and lead compounds containing 2-[N,N-(dimethylamino)methyl]phenolate as ligand

2013 ◽  
Vol 733 ◽  
pp. 71-78 ◽  
Author(s):  
Martin Novotný ◽  
Zdeňka Padělková ◽  
Jaroslav Holeček ◽  
Aleš Růžička
Keyword(s):  
Lead Compounds ◽  
Germanium Tin

New bivalent germanium, tin and lead compounds with MO bond

1996 ◽  
Vol 241 (2) ◽  
pp. 9-10 ◽  
Author(s):  
J. Barrau ◽  
G. Rima ◽  
T. El Amraoui
Keyword(s):  
Lead Compounds ◽  
Germanium Tin
Sign in / Sign up

Export Citation Format

Share Document