This article discusses the history of animal glue(gelatin)used in medical practice in China.In ancient times,gelatin was widely made from cowhide and has been found in excavations and wall paintings older than 2000 ye...This article discusses the history of animal glue(gelatin)used in medical practice in China.In ancient times,gelatin was widely made from cowhide and has been found in excavations and wall paintings older than 2000 years in Egypt,Greece,and China.However,it has been used medicinally almost exclusively in China and other East Asian countries influenced by Chinese medicine.Since 11th century,donkey-hide has gradually been replaced with cowhide in medicinal gelatin.Currently,donkey-hide gelatin is widely used medicinally in China.During the Edo period,medicinal gelatin was imported to Japan from China.Owing to the distaste for eating animal flesh in traditional Japanese culture,the production of gelatin and its medicinal use is not widespread in Japan.展开更多
为探究2种不同类型的多糖对羊皮明胶凝胶特性和结构的影响,利用卡拉胶与魔芋胶复配,银耳多糖作为安全性改性剂,研究羊皮明胶凝胶强度、质构、色泽、熔化温度及结构的变化。结果表明,卡拉胶与魔芋胶复配可显著提高羊皮明胶凝胶的凝胶强...为探究2种不同类型的多糖对羊皮明胶凝胶特性和结构的影响,利用卡拉胶与魔芋胶复配,银耳多糖作为安全性改性剂,研究羊皮明胶凝胶强度、质构、色泽、熔化温度及结构的变化。结果表明,卡拉胶与魔芋胶复配可显著提高羊皮明胶凝胶的凝胶强度和质构特性,在复配胶质量比为2∶1时,凝胶强度和硬度最大,分别为(625.75±5.28)g、(172.26±0.5)g。同时,熔化温度提高至30℃以上。加入银耳多糖后,增强了复合凝胶的粘连性。L^(*)值无显著变化,而a^(*)值和b^(*)值显著提高。红外光谱图表明,亲水胶体减少了明胶凝胶分子内氢键的形成。添加银耳多糖使羰基向高波数移动。加入多糖后羊皮明胶衍射峰逐渐变得平坦,三股螺旋和左螺旋的生成被破坏。扫描电镜(scanning electron microscope,SEM)结果表明添加适量多糖后,改善了复合凝胶的网络结构,使得网络结构更加均匀致密。综上所述,卡拉胶与魔芋胶复配主要改善羊皮明胶的质构特性和熔化温度,银耳多糖主要影响明胶凝胶的色泽和粘连性、回弹力。2种多糖都对羊皮明胶的特性产生了积极的影响,这可为以后羊皮明胶在食品上的应用提供理论依据和技术指导。展开更多
基金financed by a grant from the Zhejiang Gongshang University,the Zhejiang Province"Foreign Language and Literature"Top Disciplines(A Class)Construction High-level Project(No.2020YLZS16)。
文摘This article discusses the history of animal glue(gelatin)used in medical practice in China.In ancient times,gelatin was widely made from cowhide and has been found in excavations and wall paintings older than 2000 years in Egypt,Greece,and China.However,it has been used medicinally almost exclusively in China and other East Asian countries influenced by Chinese medicine.Since 11th century,donkey-hide has gradually been replaced with cowhide in medicinal gelatin.Currently,donkey-hide gelatin is widely used medicinally in China.During the Edo period,medicinal gelatin was imported to Japan from China.Owing to the distaste for eating animal flesh in traditional Japanese culture,the production of gelatin and its medicinal use is not widespread in Japan.
文摘为探究2种不同类型的多糖对羊皮明胶凝胶特性和结构的影响,利用卡拉胶与魔芋胶复配,银耳多糖作为安全性改性剂,研究羊皮明胶凝胶强度、质构、色泽、熔化温度及结构的变化。结果表明,卡拉胶与魔芋胶复配可显著提高羊皮明胶凝胶的凝胶强度和质构特性,在复配胶质量比为2∶1时,凝胶强度和硬度最大,分别为(625.75±5.28)g、(172.26±0.5)g。同时,熔化温度提高至30℃以上。加入银耳多糖后,增强了复合凝胶的粘连性。L^(*)值无显著变化,而a^(*)值和b^(*)值显著提高。红外光谱图表明,亲水胶体减少了明胶凝胶分子内氢键的形成。添加银耳多糖使羰基向高波数移动。加入多糖后羊皮明胶衍射峰逐渐变得平坦,三股螺旋和左螺旋的生成被破坏。扫描电镜(scanning electron microscope,SEM)结果表明添加适量多糖后,改善了复合凝胶的网络结构,使得网络结构更加均匀致密。综上所述,卡拉胶与魔芋胶复配主要改善羊皮明胶的质构特性和熔化温度,银耳多糖主要影响明胶凝胶的色泽和粘连性、回弹力。2种多糖都对羊皮明胶的特性产生了积极的影响,这可为以后羊皮明胶在食品上的应用提供理论依据和技术指导。
