Preparation of biological sustained-release nanocapsules and explore on algae-killing properties

Abstract

Graphical abstract The novel bio-based sustained-release nanocapsules was prepared by microcapsule technology. Comprehensive characterization and analysis were carried out to measure the sustained release and algae-killing properties of the new nanocapsules.

Enrichment of Phosphopeptides Based on Zirconium Phthalocyanine-Modified Magnetic Nanoparticles

“…There were three bands at 1160, 1510, and 1580 cm –1 , indicating the formation of a macrocyclic skeleton of Pc. The CO vibrations appeared at 1715 cm –1 , while the peak at 755 cm –1 belonged to the NH 2 vibrations. , …”

“…The mixture was placed into a crucible and treated at 180 °C for 0.5 h and 230 °C for 5 h in a muffle furnace. The dark green powder was soaked in HCl (6 M) for 12 h, centrifuged, and dried at 70 °C to obtain zirconium Pc (Zr-Pc) …”

“…The C�O vibrations appeared at 1715 cm −1 , while the peak at 755 cm −1 belonged to the NH 2 vibrations. 18,24 The Raman spectrum of Zr-Pc is depicted in Figure S1B. The bands at 674 and 1331 cm −1 suggested the existence of a Pc ring.…”

“…The dark green powder was soaked in HCl (6 M) for 12 h, centrifuged, and dried at 70 °C to obtain zirconium Pc (Zr-Pc). 24 Fe 3 O 4 (100 mg) and Zr-Pc (2 mg) were dispersed in a mixture containing dimethylformamide (DMF, 40 mL) and H 2 O (60 mL). The above solution was stirred at 100 °C for 4 h. After the mixture stood overnight, H 2 O (100 mL) was added and stirred at 100 °C for 4 h. The product was dried at 70 °C to obtain Fe 3 O 4 @Zr-Pc 1 in a brown powder state.…”

Charge-reversible and biodegradable chitosan-based microgels for lysozyme-triggered release of vancomycin

“…In recent years, smart microgels (MGs) have attracted increasing attention in the field of drug delivery due to their tunable particle size [16] , [17] , [18] , excellent loading ability [19] , [20] , [21] , and stimuli-responsive behaviour [22] , [23] , [24] . More importantly, MGs can be employed as a protective shell to enhance the tolerance of the loaded cargos to harsh environments [25] , [26] , [27] .…”