光照对红檵木叶片色素含量的影响研究

采用分光光度法对不同光照条件下红檵木叶片中的色素含量进行了测定,结果表明:随着光照时间的增加,红檵木叶片的质体色素含量总体上呈上升趋势,花色素苷含量呈下降趋势。光照越强,花色素苷含量越高,质体色素含量越低;反之,光照越弱,花色素苷含量越低,质体色素含量越高。因此,在园林应用中,为防止叶色转绿,应将其栽培在光照较强的环境中。     

深红红螺菌固氮酶调控机理验证实验设计及实践

从科学研究中汲取教学素材,根据实际情况优化条件,设计出一项适合微生物生理学教学的新实验,验证了光照和铵对深红红螺菌固氮酶合成和活性的调控。实验让学生认识了红螺菌代谢灵活性、营养及环境条件对其生长的影响,加深了解固氮酶的底物多样性、固氮酶的氧敏感性和固氮酶的调控机理;实验不仅有效激发了学生学习的兴趣,培养了严谨、认真的科研作风,还提高了分析问题、解决问题的能力。实践证明,科研成果转化为教学实验是提高教学水平、培养创新型人才的重要举措。     

红檵木愈伤组织的诱导研究

为提高红檵木愈伤组织的诱导频率,以红檵木不同部位为材料,对影响红檵木愈伤组织形成的几个主要因素进行了研究。结果表明,幼叶比老叶更容易产生愈伤组织。采用幼嫩部位的茎、叶作为外植体,在MS NAA2.0mg/L BA0.5Lmg/L培养基上更容易获得更多愈伤组织。且在NAA1.5mg/L BA0.5mg/L的培养基中,经暗处理的比光照条件下的更不易衰老。     

Fungal bioreceptivity of Japanese tissue papers treated with plant dyes,watercolours, and acrylic paints in paper conservation

Despite substantial literature on the dyeing of textiles, there is a lack of research about colouring Japanese mending papers (tissue papers) used for paper conservation purposes. This study investigates the fungal bioreceptivity of Japanese tissue papers after they have been treated with various dyes and pigments. A variety of toning materials including plant dyes, watercolours, acrylic paints, inks, pastels, gouaches, and colour pencils are commonly used by conservators for paper toning purposes. In this study, two Japanese tissue papers (Yukyu-shi and Sekishu Mare) were treated with selected plant dyes, watercolours, and acrylic paints and then inoculated with fungal species. Quantitative real-time polymerase chain reaction (qPCR) was used to quantify the DNA from Aspergillus niger and Penicillium rubrum as a proxy for fungal species abundance before and after inoculation and artificial moist heat ageing. qPCR primers which were universal for fungi amplified DNA from papers inoculated with A. niger and P. rubrum and these species were found to grow less on treated Sekishu Mare and Yukyu-shi papers compared with untreated papers. Sekishu Mare papers treated with artists' acrylic paints were found to be more resistant to fungal growth than similarly treated Yukyu-shi papers. This study suggests that for the best long-term preservation outcomes for paper materials in archives, libraries, galleries, and museums, acrylic paints generally perform better in conservation terms than most plant dyes and watercolours, although most colourants displayed some bioinhibition.     

光照对红橙木叶片色素含量的影响研究

采用分光光度法对不同光照条件下红檀木叶片中的色素含量进行了测定，结果表明：随着光照时间的增加，红檀木叶片的质体色素含量总体上呈上升趋势，花色素苷含量呈下降趋势。光照越强，花色素苷含量越高，质体色素含量越低；反之，光照越弱，花色素苷含量越低，质体色素含量越高。因此，在园林应用中，为防止叶色转绿，应将其栽培在光照较强的环境中。