Department of Food Science and Technology, Pukyong National University, Yongso-ro 45, Nam-Gu, Busan 608-737, Republic of Korea.
Center for Molecular and Materials Sciences, School of Pharmacy and Medical Sciences and Sansom Institute, University of South Australia, Adelaide, SA 5001, Australia.
Food Chem. 2014;152:11-7. doi: 10.1016/j.foodchem.2013.11.116. Epub 2013 Nov 28.
The edible, brown seaweed Saccharina japonica was prepared as powder in the size range 500-900 μm for the desorption release of allyl isothiocyanate (AITC). Powders were used as raw (containing lipids) and as de-oiled, where the lipid was removed. In general, de-oiled powders adsorbed larger masses of AITC after vapour or solution contact. Mass adsorbed due to solution contact exceeded vapour contact. Larger particles adsorbed more than smaller particles. No chemical bonding between AITC and the powder surface occurred. Release from vapour deposited particles reached 70-85% available within 72 h; solution deposited reached 70-90% available at 192 h. The larger amounts of AITC adsorbed via solution deposition resulted in greater vapour-phase concentrations at 72 h for antimicrobial activity studies. No loss of activity was detected against Escherichia coli, Salmonella Typhimurium or Bacillus cereus. Only a nominal activity against Staphylococcus aureus was demonstrated. S. japonica powder could be used as an edible, natural vehicle for AITC delivery.
将食用的棕色海藻裙带菜加工成 500-900μm 大小的粉末，用于丙烯基异硫氰酸酯（AITC）的解吸释放。粉末既可以作为原始（含脂）粉末使用，也可以作为脱油粉末使用，即将脂类去除。通常情况下，经过蒸汽或溶液接触后，脱油粉末吸附的 AITC 质量更大。溶液接触吸附的 AITC 多于蒸汽接触吸附的 AITC。AITC 与粉末表面之间未发生化学结合。在 72 小时内，蒸汽沉积颗粒释放的 AITC 达到 70-85%有效成分；在 192 小时内，溶液沉积颗粒释放的 AITC 达到 70-90%有效成分。由于通过溶液沉积吸附了更多的 AITC，因此在 72 小时的抗菌活性研究中，蒸汽相中 AITC 的浓度更高。对大肠杆菌、肠炎沙门氏菌或蜡状芽孢杆菌的检测均未发现活性损失。仅对金黄色葡萄球菌表现出一定的活性。裙带菜粉末可用作 AITC 的天然可食用载体。
