Matrix Assisted Laser Desorption (MALDI) is a soft ionization technique used in modern day chemistry to analyze polymers with high precision and speed. This does not require any polymer standard for mass calibration (as the case of gel – permeation chromatography GPC). Protocols only minimum amounts solvent consumables. Measurements masses individual oligomers facilitate determination monomers ...

Oxcarbazepine (OXC) was used as first line therapy or additional for treatment of partialand secondary seizures. The penetration OXC into nasal mucosa can be enhanced by formingliposome. This research has the aim to prepare and characterize iposome laoding OXC. OXCliposome formula composed using soya lechitin cholesterol with various amount usingthin film hydration method. Characterization dete...

Abstract Dynamic light scattering (DLS) is an essential technique for nanoparticle size analysis and has been employed extensively decades, but despite its long history popularity, the choice of weighting mean distribution often appears to be picked ad hoc bring results into agreement with other methods expectations by any means necessary . Here, we critically discuss application DLS characteri...

This study aimed to evaluate Attalea funifera seed oil with or without resveratrol entrapped in organogel nanoparticles vitro against A375 human melanoma tumor cells. Organogel (SON) the (RSON) formed functional that showed a particle size <100 nm, polydispersity index <0.3, negative zeta potential, and maintenance of electrical conductivity. The entrapment efficiency RSON was 99 ± 1%. SO...

where s(z), which characterizes the ‘polydispersity’, is to be estimated. In addition to actual size polydispersity, the distribution s(z) may describe additional processes, such as non-translational motions. At most, the covariance matrix of the noise components, ej1 is approximately known. The kernel, K(1; t), is assumed to be known and typically contains a scattering form factor, a weighting...

– We study the probability, PS(t), of a cluster to remain intact in one-dimensional cluster-cluster aggregation when the cluster diffusion coefficient scales with size as D(s) ∼ s . PS(t) exhibits a stretched exponential decay for γ < 0 and the power-laws t −3/2 for γ = 0, and t for 0 < γ < 2. A random walk picture explains the discontinuous and non-monotonic behavior of the exponent. The decay...

The influence of polymolecularity on molecular weight determinations is reviewed. Several molecular weight methods give so-called mixed averages, i.e. averages which are based on more than one moment of the molecular weight distribution or on powers of the moment. Molecular weight averages can be subdivided into simple, exponential resolved, order resolved and power resolved averages. Mixed ave...