Abstract: The present disclosure belongs to the technical field of biomedicine, and in particular relates to a graphene oxide (GO)-based composite nanoparticle drug delivery system for treating cervical cancer and a preparation method thereof. The composite nanoparticle drug delivery system includes an aptamer NH2-AS1411 (Aptamer NH2-AS1411, APT), monolayer graphene oxide (GO), chitosan oligosaccharide (CO) and ?-polyglutamic acid (?-PGA).

Abstract: A copper ion-complexed poly gamma-glutamic acid (?-PGA)/chitosan (CS)/cotton blended antibacterial knitted fabric and a preparation method includes chitosan that is crosslinked with poly gamma-glutamic acid, then a copper-ammonia complex ion solution is added to prepare a spinning solution. The spinning solution is wet spun and then stretched, washed with water, finished, washed with water, and dried to get copper ion-complexed poly gamma-glutamic acid/chitosan composite fibers. The blended antibacterial knitted fabric is then prepared by using cotton fiber yarns and the composite fibers. There is a very high coordination coefficient between carboxyl groups of gamma-PGA and amino groups of CS, so the structure is stable. Poly-gamma glutamic acid can be used as water-retaining agent and heavy metal ion adsorbent, which can increase the loading rate of copper ions.

Abstract: The present disclosure relates to the technical field of food supplement application, in particular to a high-intensity outdoor sports food supplement rich in biological ions and a preparation method thereof. The sports food supplement is prepared using the following components: poly-?-glutamic acid, magnesium sulfate, sodium carbonate, ammonium bicarbonate, potassium magnesium aspartate, potassium chloride, sodium citrate, potassium citrate, hydroxide calcium, zinc sulfate, antioxidant, preservative, Schisandra chinensis extraction solution, and water. The present disclosure promotes faster recovery of middle-aged men during exercise, reduces the risk of injury, and improves the ability of high-intensity running. The concentrated solution provided by the present disclosure has no bitter taste, a slightly sweet and refreshing taste, good palatability and good stability.

Abstract: A copper ion-complexed poly gamma-glutamic acid (?-PGA)/chitosan (CS)/cotton blended antibacterial knitted fabric and a preparation method includes chitosan that is crosslinked with poly gamma-glutamic acid, then a copper-ammonia complex ion solution is added to prepare a spinning solution. The spinning solution is wet spun and then stretched, washed with water, finished, washed with water, and dried to get copper ion-complexed poly gamma-glutamic acid/chitosan composite fibers. The blended antibacterial knitted fabric is then prepared by using cotton fiber yarns and the composite fibers. There is a very high coordination coefficient between carboxyl groups of gamma-PGA and amino groups of CS, so the structure is stable. Poly-gamma glutamic acid can be used as water-retaining agent and heavy metal ion adsorbent, which can increase the loading rate of copper ions.