Catechin is a natural phenolic compound with various bioactivities. However, it is unstable under light and heat environments. Amylose can form a single helical hydrophobic cavity to encapsulate and protect bioactive compounds. In this work, we applied amylose inclusion complexes (IC) to encapsulate a lipophilized catechin, i.e., hexadecyl catechin (HC), to improve its photostability and thermal stability. The formation of amylose-HC IC was characterized using differential scanning calorimetry, X-ray diffraction, and Fourier transform infrared spectroscopy. The photostability and thermal stability studies showed that the retention of guest molecules in IC was 86.1% ± 5.1% and 87.4% ± 0.6%, respectively, which was significantly higher than that of the catechin, HC, and amylose-HC physical mixture groups. Moreover, the in vitro release profile of IC demonstrated a steady and complete release of catechin. The findings show the amylose encapsulation of catechin is a promising technique to preserve bioactive compounds in food.This study is focused on enhancing the stability of mechanical and chemical properties of thermoplastic starch (TPS) by dual crosslinking strategy through melt processing conditions. The dually crosslinked TPS was prepared by in situ reaction of starch, glycerol, and epichlorohydrin (ECH), resulting in both noncovalent and covalent bond formation. The TPS was characterized by tensile testing, dynamic mechanical analysis (DMTA), rheology, and solubility in water. A substantial increase in tensile strength, Young’s modulus, insoluble portion, and stability in water for dually crosslinked TPS was observed in comparison with conventional TPS. The rheology results indicated that the ECH induced the formation of 3D networks and significantly limited the chain mobility of the melted TPS, resulting in an extended relaxation process, which was also verified by DMTA. The suggested strategy avoids any chemical modification pretreatment of starch for introducing covalent bonds into TPS before one-step mixing using the melt processing technique.Amphipathic starch (AS) with hydrophobic octenylsuccinate (OS) and hydrophilic carboxymethyl (CM) substituents was prepared by the carboxymethylation and octenylsuccinylation of starch for strong bonding to fiber and easy removal from sized yarn. Two series of AS derivatives with differential degrees of substitution (DS) and differential mole percentages of OS to total substituents (Pos) were examined to reveal the effects of Pos and DS values on bonding of the starch to cotton and polyester fibers. It was found that the amphipathic modification was able to significantly increase bonding strength of the starch. Combination of the CM and OS substituents could increase the bonding strength more than each one alone. Furthermore, desizing trial proved that the AS was desizable by either enzyme or oxidant desizing. Starch octenylsuccinylation and carboxymethylation was a good way for corn starch to achieve strong bonding to fibers and easy removal from sized yarns.The differences in the source and structure of xylans make them have various biological activities. Selleckchem Usp22i-S02 However, due to their inherent structural limitations, the various biological activities of xylans are far lower than those of commercial drugs. Currently, several types of molecular modification methods have been developed to address these limitations, and many derivatives with specific biological activity have been obtained. Further research on structural characteristics, structure-activity relationship and mechanism of action is of great significance for the development of xylan derivatives. Therefore, the major molecular modification methods of xylans are introduced in this paper, and the primary structure and conformation characteristics of xylans and their derivatives are summarized. In addition, the biological activity and structure-activity relationship of the modified xylans are also discussed.To promote bactericidal activity, improve photostability and safety, novel antibacterial nanoparticle system based on photodynamic action (PDA) was prepared here through conjugation of photosensitizer hematoporphyrin (HP) onto carboxymethyl chitosan (CMCS) via amide linkage and followed by ultrasonic treatment. The system was stable in PBS (pH 7.4) and could effectively inhibit the photodegradation of conjugated HP because of aggregation-caused quenching effect. ROS produced by the conjugated HP under light exposure could change the structure of nanoparticles by oxidizing the CMCS skeleton and thereby significantly promote the photodynamic activity of HP and its photodynamic activity after 6 h was higher than that of HP·2HCl under the same conditions. Antibacterial experiments showed that CMCS-HP nanoparticles had excellent photodynamic antibacterial activity, and the bacterial inhibition rates after 60 min of light exposure were greater than 97%. Safety evaluation exhibited that the nanoparticles were safe to mammalian cells, showing great potential for antibacterial therapy.Large, deep, complex, and severe tissue defects and deformities of the face are the problems encountered in clinical practice. Autologous tissue reconstruction or allograft face transplantation has been adopted but has problems such as blood supply difficulties, collateral damage, immune rejection, and ethical disputes. 3D bioprinting enables personalized tissue regeneration. However, simple hydrogels are prone to collapse during printing, are limited in size, and have poor shape and structure. The present study used three polysaccharide hydrogel composites of nanocellulose, agarose, and sodium alginate with seeded cells as bioinks and polyvinyl alcohol (PVA) as sacrificial material to construct the structures that did not collapse (characteristic parts, such as lips and nose). The nutrient network gradually formed a blood vessel-like structure. The hydrogels prepared using these three polysaccharides have great potential in the construction of personalized, complex, and vascularized tissue-engineered anatomical faces and provide a new strategy for autologous full face reconstruction.