Duchefa Gelrite^TM is a naturally derived gelling polymer that can be used in a variety of applications as a solidification agent instead of agar. Produced by microbial fermentation, Gelrite^TM is a highly purified, natural anionic polysaccharide with the variations commonly associated with agar. Gelrite^TM forms rigid, brittle, agar-like gels at approximately half the use level of agar in presence of soluble salt like Mg²⁺ and Ca²⁺. Gels prepared with Gelrite™ are remarkably clear in comparison to those formed with agar. Gelrite^TM contains no contaminating matters (e.g., phenolic compounds) as found in agar that are toxic to certain sensitive organisms.

★活体技术荧光检测荧光蛋白标记适用于标记细胞、病毒、基因等，通常使用的是 GFP、EGFP、RFP（DsRed）等；荧光染料标记适用于标记抗体、多肽、小分子药物等；常用的有 Cy3、Cy5、Cy5.5 及 Cy7量子点标记（新的标记方法）适用于标记肿瘤，主要应用在活细胞实时动态荧光观察与成像；量子点（quantum dot) 是一种能发射荧光的半导体纳米微晶体，外观恰似一极小的点状物。量子点荧光比有机荧光染料的发射光强的 20 倍，稳定性强 100 倍以上，具有荧光发光光谱较窄、量子产率高、不易漂白、激发光谱宽、颜色可调，并且光化学稳定性高，不易分解等诸多优点。