Antioxidant,anti-alpha-glucosidase and pancreatic beta-cell protective effects of methanolic extract of Ensete superbum Cheesm seeds

Objective: To investigate the antioxidant, anti-a-glucosidase and pancreatic b-cell protective potential of Ensete superbum(E. superbum) seeds.Methods: A variety of in vitro assays including radical scavenging, reducing power potential, phenolic content determination, a-glucosidase assay and pancreatic b-cell(1.4E7 cells) viability were employed for assessing the effect of methanolic extract of E. superbum seeds.Results: The radical scavenging and reducing power effects comparable with the standard rutin were obtained while the enzyme inhibitory activity of the extract was 68-fold better than the standard antidiabetic drug, acarbose. The seed extract of E. superbum was packed-full of polyphenols with mean percentage gallic acid equivalent value of(38.2 ± 1.8)(n = 3). The protection of pancreatic cells from massive onslaught of hydrogen peroxide was far superior to that obtained for rutin.Conclusions: The reputed antidiabetic therapeutic uses of the seeds extract of E. superbum may be justified on the basis of inhibition of carbohydrate enzymes, antioxidant effects and pancreatic b-cell protection.

细螯沼虾染色体的研究

以精巢为材料，研究了细螯沼虾有丝分裂染色体及减数分裂二价体组型。细螯沼虾染色体数目２ｎ＝１００，ｎ＝５０；有丝分裂中期染色体小，呈点状，无法进行核型分析；减数分裂双线期二价体呈棒状，着丝点清晰，染色体总臂数ＮＦ＝１７２，核型公式为Ｎ＝３０Ｍ＋６ＳＭ＋１４ＳＴ，Ｔ。此外，本文还对沼虾属的核型演化关系进行了初步探讨。

不同浓度吲哚乙酸对多肉植物华丽风车叶插繁殖的影响

为研究吲哚乙酸对多肉植物华丽风车叶插繁殖的影响,以清水为对照,设置4个吲哚乙酸(IAA)浓度处理,分别为50mg/L,100 mg/L,150 mg/L,200 mg/L。结果表明,IAA显著提高了华丽风车扦插成活率、生根率、生根数量、平均根长和根系干鲜质量,随IAA浓度的增加,呈先升高后降低的趋势,在150 mg/L时效果最好,成活率为97.37%,生根率为98.72%,成活率最高、生根特性最好,是较适宜的IAA处理浓度。