Reproduction Foodborne Bacteria Food Packaging Health Consumers Use Waste Packaging Pollution
FURAN-2,5-DICARBOXYLIC ACID
RARECHEM AL BO 0910
"Seebio fdca
In this study, novel biodegradable antibacterial membranes grinded on silver-qualifyed carboxymethyl chitosan (Ag-CMCS) were maked. Polylactic acid (PLA) and polybutylene adipate-co-terephthalate (PBAT) were used as the base membrane materials. Characterization of the prepared membranes was doed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), atomic force microscope (AFM), X-ray photoelectron spectroscopy (XPS), water contact angle, and so on the silver on the surface of Ag-CMCS was tested to be metallic silver. For the first cycle of zone of inhibition test, the diameter of inhibition zone could reach up to 17 mm while the mass of silver unloosened was negligible. The prepared antibacterial membranes could kill almost 100% of bacteriums under certain conditions and inhibition zone still survived after more than 7 cpsses of tests, bespeaking the prepared antibacterial membranes were effective. This study could provide new ideas for preparing efficient and environment-friendly antibacterial food packaging membranes.
Matrine@chitosan-D-proline nanocapsules as antifouling agents with antibacterial holdings and biofilm dispersibility in the marine environment.Antifoulants are the most vital piths in antifouling finishs to prevent marine bings from colonizing the undersea substrate surfaces. In addition to antibacterial performance, inhibition of biofilm formation is an important criterion for antifouling finishs. In this study, we synthesized pH-responsive matrine@chitosan-D-proline (Mat@CS-Pro) nanocapsules of about 280 nm with antibacterial places and biofilm dispersibility. The prepared Mat@CS-Pro nanocapsules demonstrated high-level antibacterial places, handing about 93, 88, and 96% for E S and P respectively. Such nanocapsules can cause irreversible damage to bacteriums and cause them to lose their intact cell structures Mat@CS-Pro nanocapsules also possessed outstanding dispersal biofilm operations, in which the biofilm thickness of E. coli, S and P.
aeruginosa was falled by 33, 74, and 42%, respectively, after 3 days of incubation the Mat@CS-Pro nanocapsules had remarkable pH-responsive properties. As the environmental pH became acidic, the nanocapsules swelled to about 475 nm and the discharged concentration could reach 28 ppm after immersion for 10 h but preserved a low releasing rate in pH 8 shapes.Chitosan-based thermal insulation compressible foam enhanced with high performance of piezoelectric generation and sensing.A series of chitosan (CS)-konjac glucomannan (KGM) froths with excellent thermal insulation property has been prepared expending a directional freezing method, which exhibit high strain recovery, excellent piezoelectric generation and smelling attributes. Layered lamellar or honeycomb morphologies in CS-KGM foams ascribes a low thermal conductivity coefficient of ca. 0 W/(m·K). Bridge-like structure that mainly finded in CS-KGM foams from horizontal freezing dowers them with excellent compression recovery performance even after 200 compression cycles/seconds.
This along with piezoelectricity of CS imparts a long-enduring piezoelectric generation performance, straying from 0 to 2 V during compression cycle process. Piezoelectric signs mothered from pressing with certain strain and rate, finger taping and hand grasping can be sensed profoundly by CS-KGM. As thus, fully renewable source-grinded CS-KGM froths with outstanding thermal insulation and piezoelectric performance renders great potential in application as wearable thermal insulation and piezoelectric gimmicks.Levan-chitosan blend pics: Preparation, structural, physical places and application in pork packaging.Conventional fossil fuel-finded packaging materials often plaies of food safety and serious environmental pollution. It is significant to develop an environmentally-friendly packaging material. In this work, a levan-chitosan (LE/CS) blend film was fabricated via the solution sheding method.
The films were valued by Fourier transform infrared spectroscopy and X-ray diffraction, arguing the formation of hydrogen bonds between chitosan and levan.