5 research outputs found
Gelatin-Based Active Edible Film with pH-Sensing for Maintaining and Monitoring Fish Freshness
The
development of packaging films with food preservation
and monitoring
functions is of great significance and applications. Herein, gelatin
was combined with rosmarinic acid (RosA) and blueberry anthocyanin
extract (BAE) to fabricate RosA-gelatin/BAE (RGA) films with pH-responsiveness
and long-term antioxidant and antibacterial activities. The films
have better surface hydrophobicity and antiswelling performance than
that of pure gelatin film. The films show good ductility and the elongation
at break of the films can be easily adjusted in the range of 1.01–292.19%
by adjusting the content of BAE. The films can block ultraviolet light,
scavenge the ABTS+ radical, and kill bacteria almost 100%.
Significantly, the films showed good pH/NH3 responsiveness
as an obvious color change. Comparing with polyethylene film, there
was a reduction of around 60.8% in the release of volatile base nitrogen
compounds from crucian in storage using RGA5. Overall, these films
may be useful for food preservation and real-time quality monitoring
Effect of Dehydrothermal Treatment on the Structure and Properties of a Collagen-Based Heterogeneous Bilayer Membrane
The
use of the guided bone regeneration technique in oral surgery
has been proven to be an effective method for repairing alveolar bone
defects. However, the success of this technique heavily relies on
the barrier membrane used. Collagen is the most frequently used raw
material to fabricate a resorbable barrier membrane, which has some
drawbacks during clinical application, such as poor mechanical properties
and rapid biodegradation. To address these issues, a new approach
was developed for the preparation of collagen-based heterogeneous
bilayer membranes, which involves a combination of physical treatment
and biocompatible chemical cross-linking. The dialdehyde carboxymethyl
cellulose was used to cross-link collagen to fabricate the membrane,
and dehydrothermal (DHT) treatment was applied to enhance its properties.
The results showed that DHT treatment apparently improved the structure
stability and compression strength in both dry and swollen states.
The biodegradation rate of the bilayer membrane was depressed, and
the porosity was improved by dehydrogenation. The bilayer membrane
was found to have good cytocompatibility. Moreover, the compact lower
layer of the bilayer membrane possessed a strong barrier function
to fibroblasts while the loose upper layer was able to enhance the
adhesion, proliferation, and osteogenic differentiation of osteoblasts.
Overall, the collagen-based heterogeneous bilayer membrane has great
potential for the application in guided bone regeneration. For the
membrane, the improved mechanical properties, reduced biodegradation
rate, and enhanced osteoblast response make it a promising material
for oral surgery applications
Additional file 3: of Follow-up of the manganese-exposed workers healthy cohort (MEWHC) and biobank management from 2011 to 2017 in China
Table S2. Summary of the number of samples deposited in the biobank obtained from the heavy-metal cohort (MEWHC) initiated in 2011. (PDF 89 kb
Additional file 1: of Follow-up of the manganese-exposed workers healthy cohort (MEWHC) and biobank management from 2011 to 2017 in China
Table S1. Air monitoring of different workshops and jobs in the ferro-Mn alloy production plant in 2017. (PDF 107 kb
Additional file 2: of Follow-up of the manganese-exposed workers healthy cohort (MEWHC) and biobank management from 2011 to 2017 in China
Supplementary information for the biobank of the MEWHC. (PDF 398 kb