Thermal Tempering Does Not Increase the Survival of Eyed Salmonid Eggs

Eyed salmonid eggs can be subjected to large temperature swings during development, particularly when shipped in ice-filled containers from broodstock facilities to production hatcheries. This study examined the effect of thermal tempering on the survival of brown trout Salmo trutta and rainbow trout Oncorhynchus mykiss eyed eggs to hatch. Eyed eggs at 1°C were either directly placed in 11°C water or allowed to thermally temper from 1°C to 11°C gradually over an hour. In addition, each of the tempering treatments occurred either with or without a 10-minute iodophor disinfection treatment. Tempering had no significant effect on survival-to-hatch in either species (85% - 97%). However, survival was significantly lower in rainbow trout eggs subjected to iodine disinfection (73% - 75%) compared to non-disinfected eggs (91% - 97%), likely because of the close proximity to hatch. The results of this study indicate that slowly raising the temperature (thermal tempering) of brown trout and rainbow trout eyed eggs is unnecessary. Additionally, iodine disinfection of eyed salmonid eggs in close proximity to hatching should be avoided.

Antimicrobial Rubber Nanocapsule-Based Iodophor Promotes Wound Healing

Povidone–iodine has been leading the market of clinical disinfectants worldwide since the last century but has turned a blind eye to its cytotoxic effect on the cells of the human tissue.In this study,a commercial povidone–iodine,though considered an excellent antibacterial agent,was found to have a negative influence on mammal cell growth and wound healing in preclinical trials.At the early stage of wound treatment,it even severely deteriorated the wound and enlarged the wound area.However,our newly formulated iodophors,based on rubber nanoparticles,were able to discriminate between human and bacterial cells by inhibiting the cytotoxicity damage caused by iodine to mammalian tissue and vigorously,killed the bacterial cells,thereby,presenting as superior performers of wound care,compared with povidone–iodine.Wetook advantage of a redox combination of an emulsion complex loaded with iodine to solidify a trans-polyisoprene rubber into nanocapsules.Specifically,our fabricated class of rubber nanocapsules proved to be capable of promoting remarkable cell proliferation and wound recovery,thereby,serving as a promising candidate for biocompatible and healing-favored wound disinfection agents in place of povidone–iodine.