BSA	bovine serum albumin
bw	body weight
CAT	catalase
CS	chitosan
CS/COS-Ms	chitosan/chitooligosaccharide microparticles
COS	chitooligosaccharide
CS-SeNPs	chitosan-decorated selenium nanopartilcels
DLS	dynamic light scattering
DPPH	1,1-diphenyl-2-picrylhydrazyl
EC50	concentration for 50% of maximal effect
EDS	energy-dispersive X-ray spectroscopy
GSH	glutathione
GSH-Px	glutathione peroxidase
ICP-MS	inductively coupled plasma mass spectrometry
ICR	Institute of Cancer Research
KM	Kunming
KMnO4	potassium permanganate
LD50	median lethal dose
MW	molecular weight
MWCO	molecular weight cut-off
PDI	polydispersibility index
RH	relative humidity
ROS	radical oxygen species
Se	selenium
SEM	scanning electron microscopy
SeNPs	selenium nanoparticles
SeNPs-CS/COS-Ms	selenium-nanoparticles-loaded chitosan/chitooligosaccharide microparticles
SeNPs-CS-Ms	selenium nanoparticles-embedded chitosan microspheres
SGF	simulated gastric fluid
SIF	simulated intestinal fluid
SOD	superoxide dismutase
SPF	specific-pathogen-free
TBARS	thiobarbituric acid-reactive substances
TCC	total carbonyl compounds
TEM	transmission electron microscopy
UF	ultrafiltration
Vc	ascorbic acid