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Complexes with purely pyridine-based macrocycles are rarely studied in photo(electro)catalysis. We synthesized and investigated macrocycles, in which two 2,2'-bipyridine (bpy) units are linked twice by two cyano-methylene groups, to yield the basic tetradentate, bipyridine based ligand framework (pyr). The protons in the bridges were substituted to obtain derivatives with one (pyr-alk) or two (...
The abuse of esters of natural androgenic steroids in cattle fattening and sports is hard to control via routine urine testing. The esters are rapidly hydrolysed in vivo into substances which are also endogenously present in urine. In veterinary control strange findings of 17beta-testosterone and 17alpha-testosterone in urine are often ignored because of the lack of statistically sound referenc...
L-Selenocysteine (Sec or U) has been called the “21st amino acid”.1 Like the twenty common amino acids, selenocysteine is inserted during the translation of mRNA and has its own tRNASec and codon, UGA. This codon also serves as the opal stop codon. Decoding a UGA codon as one for selenocysteine requires a special structure in the 3′ untranslated region of the mRNA called a selenocysteine insert...
The circadian clock links our daily cycles of sleep and activity to the external environment. Deregulation of the clock is implicated in a number of human disorders, including depression, seasonal affective disorder, and metabolic disorders. Casein kinase 1 epsilon (CK1 ) and casein kinase 1 delta (CK1 ) are closely related Ser-Thr protein kinases that serve as key clock regulators as demonstra...
Strongly interacting matter under extreme conditions is a topic of continuing interest, both from the point of view of ultrarelativistic heavy-ion collisions and lattice QCD. In our work we use approaches based on the timehonored Nambu–Jona-Lasinio model in order to investigate the nature of the different phases of QCD matter at finite temperatures and densities. From hadron spectroscopy it is ...
Open AccessCCS ChemistryRESEARCH ARTICLE1 Nov 2021The Mechanochemical Release of Naphthalimide Fluorophores from ?-Carbonate and ?-Carbamate Disulfide-Centered Polymers Zhiyuan Shi, Qingchuan Song, Robert Göstl Andreas Herrmann Shi DWI—Leibniz Institute for Interactive Materials, Aachen 52056 Technical Macromolecular Chemistry, RWTH University, 52074 Department I Internal Medicine, University H...
With the phase-out of PentaBDE in 2004, alternative flame retardants are being used in polyurethane foam to meet flammability standards. However, insufficient information is available on the identity of the flame retardants currently in use. Baby products containing polyurethane foam must meet California state furniture flammability standards, which likely affects the use of flame retardants in...
The German Environmental Survey (GerES) is a large-scale population study which has repeatedly been carried out in Germany. GerES I was conducted in 1985/86 followed by GerES II in 1990/92 and GerES III in 1998. In GerES III about 750 samples of house dust collected in homes of the study participants were analysed for their content of PCP, lindane, DDT, propoxur, methoxychlor, chlorpyrifos, pol...
Alpha-Synuclein was expressed in Escherichia coli using plasmid pT7-7 encoding for the protein (courtesy of the Lansbury laboratory, Harvard Medical School, Cambridge, MA). Following transformation, BL21competent cells were grown in LB in the presence of ampicillin (100 mg/ml). Cells were induced with IPTG, cultured at 37 °C for 4 hours and harvested by centrifugation in an Avanti J25 centrifug...
Inhalation of halogenated flame-retardants (HFRs) released from consumer products is an important route of exposure. However, not all airborne HFRs are respirable, and thus interact with vascular membranes within the gas exchange (alveolar) region of the lung. HFRs associated with large (>4 µm), inhalable airborne particulates are trapped on the mucosal lining of the respiratory tract and then ...
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