Mechanistic insights into the competitive inhibition of enzyme-mimetic activity of gold nanoparticles for dual mode colorimetric and fluorescence detection of biothiols.

In this work, the interaction behaviour of gold nanoparticles (AuNPs) with o-phenylenediamine (OPD) was studied to ascertain the nanozyme-substrate interaction. The UV-Vis absorption, high-resolution transmission electron microscopy and zeta potential analysis revealed that the electron-rich nitrogen atoms in OPD showed a stronger affinity toward electron-deficient surface, indicating a stronger interaction between nanozyme and substrate molecules. Subsequently, under optimum conditions, AuNPs are used as nanozyme to catalyze the oxidation of OPD in the presence of HO.

Memory defects in post-dauer are a result of altered insulin signalling.

In response to unfavourable conditions and environmental duress, follows an alternative developmental stage called the dauer larva, which is associated with various metabolic changes. Dauers can survive in harsh conditions for several months. They resume their development on returning to favourable conditions.

Insulin signaling in dopaminergic neurons regulates extended memory formation in Caenorhabditis elegans.

Insulin alters several brain functions, and perturbations in insulin levels could be a precipitating factor for Parkinson's disease, a disease associated with the degeneration of dopaminergic neurons. It is unclear whether insulin alters the dopamine signaling pathway and modulates learning and memory. In Caenorhabditis elegans, daf-2 insulin receptor mutants have extended memory when trained for olfactory adaptation.

Olfactory imprinting enhances associative learning and memory in C. elegans.

Learning and memory are fundamental processes for an organism's normal physiological function. Learning can occur at any stage of the organism's physiological development. Imprinted memories formed during the early developmental stage, unlike learning and memory, can last a lifetime.

Alginate Gel Immobilization of for Optical Calcium Imaging of Neurons.

A fascinating question in neuroscience is how sensory stimuli evoke calcium dynamics in neurons. is one of the most suitable models for optically recording high-throughput calcium spikes at single-cell resolution. However, calcium imaging in is challenging due to the difficulties associated with immobilizing the organism.