Polymer Laboratory, Petrochemical Division, Egyptian Petroleum Research Institute (EPRI), P.O. Box 11727, Nasr City, Cairo, Egypt.
Radiation Research of Polymer Department, National Centre for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt.
Sci Rep. 2023 Mar 18;13(1):4500. doi: 10.1038/s41598-023-31372-7.
The main component of rosin natural gum is abietic acid, which has an interesting chemical structure to be studied with the influence of gamma-ray and the antimicrobial activity on the properties of a cheap abundant solid state natural material of rosin. Rosin is exposed to a wide scale of gamma-ray ranges from 0 to 100 kGy. The changes in the properties are tracked by various techniques of FTIR, XRD, TGA, GPC, and SEM. The molecular weight of rosin changes from 370 g/mol to higher and the morphological properties were investigated. The irradiated rosin acid (IRA) at different irradiation doses exploited antimicrobial effect versus Gram-positive and Gram-negative as well. The inhibition zone enhanced from 15 to 33, 14 to 28, 14 to 20, and 9 to 14 mm for Gram-positive and Gram-negative, respectively. Moreover, bioactive behavior for irradiated rosin of 40 kGy recorded the highest antibacterial activity against both types of bacteria. The outcome data of antimicrobial activity are good and confirm that there is a significant effect of irradiation dose on the biocidal activity of rosin.
松香天然树脂的主要成分是松香酸，其具有有趣的化学结构，可用伽马射线的影响和抗菌活性来研究其廉价丰富的固体天然松香材料的特性。松香会受到 0 到 100kGy 范围内的各种伽马射线的辐射。通过傅里叶变换红外光谱（FTIR）、X 射线衍射（XRD）、热重分析（TGA）、凝胶渗透色谱（GPC）和扫描电子显微镜（SEM）等各种技术来追踪其特性的变化。松香的分子量从 370g/mol 增加到更高，并研究了其形态特性。不同辐照剂量的松香酸（IRA）对革兰氏阳性菌和革兰氏阴性菌均具有抗菌作用。抑菌圈分别从 15 到 33、14 到 28、14 到 20 和 9 到 14mm 增加，阳性菌和阴性菌的抑菌圈都有所增加。此外，40kGy 辐照松香的生物活性行为对两种类型的细菌均表现出最高的抗菌活性。抗菌活性的结果数据良好，并证实辐照剂量对松香的杀菌活性有显著影响。
