Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characterization of casein and Poly-L-arginine Multilayer Films   Thin films containing casein appear to be a promising material for coatings
used in the medical area to promote biomineralization. alfa- and beta-casein
and poly-L-arginine multilayer films were formed by the layer-by layer
technique and their thickness and mass were analyzed by ellipsometry and quartz
crystal microbalance with dissipation monitoring (QCM-D). We investigated the
effect of the type of casein used for the film formation and of the
polyethyleneimine anchoring layer on the thickness and mass of adsorbed films.
The analysis of the mass of films during their post-treatment with the
solutions of various ionic strength and pH provided the information concerning
films stability, while the XPS elemental analysis confirmed binding of calcium
ions by the casein embedded in the multilayers.

19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg