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Short wavelength visible light is viewed as the main agent responsible for oxidative modification of melanin in the human retinal pigment epithelium (RPE). The aim of this research was to study light-induced modifications of melanin using iron and zinc as molecular probes. A synthetic model of eumelanin was treated by intense violet light. The interaction of melanin with metal ions was examined by electron paramagnetic resonance (EPR) spectroscopy and a thiocyanate assay. Weak photodegradation of melanin was shown to increase exposure of melanin subunits, while stronger photodegradation caused a loss of melanin subunits. Iron-binding in such melanin was weak and nonspecific.
This article was published in the following journal.
Name: Acta biochimica Polonica
Photoinduced transition-metal- and photosensitizer-free cross-coupling of aryl halides (including Ar-Cl, Ar-Br, and Ar-I) with H-phosphonates (including dialkyl phosphonates and diarylphosphine oxides...
Noncoding RNA molecules take part in many biological processes, while metal ions play crucial roles in helping RNAs to perform their functions. However, the statics and dynamics of these metal ions ar...
Monomers and oligomers of the amyloid-β peptide aggregate to form the fibrils found in the brains of Alzheimer´s disease patients. These monomers and oligomers are largely disordered and can interac...
In recent years, transition metal complexes with their prominent photophysical properties have emerged as versatile chemosensors to probe different target analytes, including metal ions. By incorporat...
This research study shows the adsorptive potential of biopolymer based nanocomposite for the removal of Pb(II) ions from aqueous phase. The nanocomposite was synthesized by Femur calcined hydroxyapati...
All metal implants release metal ions because of corrosion. Total knee arthroplasty implants have large metal surface areas and therefore substantial potential for corrosion. It is planned...
Metal Ions levels of cobalt, chromium, and titanium in 40 patients preoperatively and at least 1 year status post total hip replacement with the Trident II Tritatnium system using an MDM l...
Modern knee implants combine several types of metal and therefore potentially expose patients to different metal ions. Titanium niobium nitride coating (TiNbN) acts like a physical barrie...
This evaluation is being conducted to evaluate the performance of the ASR arthroplasty. The performance of the devices will be assessed by: Clinical parameters: pain, function, satisfacti...
To evaluate the concentration of cytokines and metal ions in blod samples and biopsies from patients undergoing a hip revision.
A family of soluble metal binding proteins that are involved in the intracellular transport of specific metal ions and their transfer to the appropriate metalloprotein precursor.
The reaction of two molecular entities via oxidation usually catalyzed by a transition metal compound and involving dioxygen as the oxidant.
This discipline concerns the study of SEXUALITY, and the application of sexual knowledge such as sexual attitudes, psychology, and SEXUAL BEHAVIOR. Scope of application generally includes educational (SEX EDUCATION), clinical (SEX COUNSELING), and other settings.
Proteins that have one or more tightly bound metal ions forming part of their structure. (Dorland, 28th ed)
Complexing agent for removal of traces of heavy metal ions. It acts also as a hypocalcemic agent.
An assay is an analytic procedure for qualitatively assessing or quantitatively measuring the presence or amount or the functional activity of a target entity. This can be a drug or biochemical substance or a cell in an organism or organic sample. ...