This study was designed to compare the quality characteristics of spray-dried (SD) and freeze-dried (FD) Pueraria thunbergiana extracts powder hot water extracts. Quality characteristics of the SD and FD powder including moisture content, color value, water absorption index, water solubility index, dynamic angle and antioxidant activities were evaluated. The moisture content of SD powder (1.50%) was lower than that of FD powder (2.92%). L* and b* values of SD powder was lower than of FD powder. The water absorption index was higher in FD powder (1.40) and water solubility index in SD powder (94.10%) was higher than that FD powder (90.69%). Dynamic angle of SD powder (36.46°) was higher than that of FD powder (33.30°). The DPPH radical scavenging activities of 5 mg/mL solution of SD powder and FD powder were 85.38 mg/mL, 59.38 mg/mL, respectively. And, the same trend was observed for the ABTS radical scavenging activities of the drying powder as that observed for their DPPH radical scavenging activities. There were relatively higher contents of phenolic compounds in SD powders than in FD powders. In conclusion, spray-dried Pueraria thunbergiana extracts showed the high WSI, polyphenol, DPPH and ABTS radical scavenging activities and low moisture content and dynamic angle than freeze dried powder.

최근 합성 염모제의 부작용들 때문에 인체에 무해한 천연재료를 이용한 염색에 대한 관심이 고조되어 있다. 본 연구에서는 농산 폐기물인 칡뿌리 추출물을 이용해 탈색 모발에 천연 염색을 함으로써 염색에 적절한 염색 시간, 염색시 온도와 매염과 매염제 처리 농도 변화 등에 따른 모발의 염색 정도를 색차계를 통해 조사하였다. 합성 염모제가 가진 화학 물질로 인한 모발 손상에 비해 칡뿌리 추출물을 이용한 모발 염색은 손상도를 낮춰주고 큐티클을 부드럽게 유지시키는 결과를 가져왔다. 칡 추출물만으로 염색한 모발이 가장 어두워짐을 관찰함으로써, 매염제는 염색의 보조 역할을하는 성분임을 알 수 있었다. 본 연구의 결과를 종합하여 볼 때, 칡뿌리 추출물은 합성 염모제에 비해 모발 손상도가 적으며 칡뿌리 추출물을 천연 모발 염모제의 주원료로써 활용가치가 있음을 제안하는 바이다.

Compounds of isolated from roots extract of Pueraria thunbergiana were tested their inhibitory effects on α-glucosidase and α-amylase. Inhibitory activity of methylene chloride (MC) fraction and ethyl acetate (EA) fraction against α-glucosidase showed more than 60% at a concentration of 500μg/ml. Among the nine compounds tested on α-glucosidase, biochanin A, (-)-tuberosin and calycosin from MC fraction and daidzein from EA fraction were stronger inhibitors than acarbose (IC50=530μg/ml), and their IC50 were 9, 144, 328 and 20μg/ml, respectively. Biochanin A and (-)-tuberosin also inhibited α-amylase activity as like as acarbose IC50=20.5μg/ml), and their IC50 were 22 and 348μg/ml, respectively. Although daidzein was already known α-glucosidase inhibitory effects, it was newly evaluated that biochanin A and (-)-tuberosin inhibited α-glucosidase as well as α-amylase, and that calycosin did α-glucosidase.

본 연구에서는 건강기능성 버섯으로 알려진 A. blazei 에 대하여 재배시 농가에서 사용하는 배지의 종류에 따라 생산된 자실체의 면역 기능성 차이를 규명 할 목적으로 in viro 상태에서 추출다당체의 세포에 대한 영향을 살펴보았다. 기능성 약용 버섯인 A. balzei 에 대하여 재배시 농가에서 사용하는 배지에 따른 in viro 상태에서 세포에 대한 다당체의 영향을 검토하였다. 추출용매에 따른 항종양 물질의 저해효과는 약 25∼30% 수율범