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In this research, some herbal teas and infusions traditionally used in the treatment of diabetes in Turkey, have been studied
for their antidiabetic effects on in vitro glucose diffusion and phenolic contents and antioxidant activities. Ten aqueous herbal tea extracts were examined using an
in vitro method to determine their effects on glucose movement across the gastrointestinal tract. Total phenol content of herbal teas
was analyzed by Folin–Ciocalteu’s procedure. Antioxidant activities of herbal teas were evaluated by the effect of extracts
on DPPH radical and hydrogen peroxide scavenging. Antioxidant activity was defined as the amount of the sample to decrease
the initial DPPH· concentration by 50% as efficient concentration, EC50. Antiradical activity [AE] was calculated as 1/EC50. Values were evaluated statistically. Results support the view that none of the herbal teas showed antidiabetic effect on
glucose diffusion using in vitro model glucose absorption. Teas were arranged in the order of green tea > peppermint > thyme > black tea > relax tea > absinthium
> shrubby blackberry > sage > roselle > olive leaves according to their total phenol contents. Among ten herbal teas, green
tea had the highest hydrogen-donating capacity against to DPPH radical. Ranking of the herbal teas with respect to their DPPH
radical scavenging activity were green tea > peppermint > black tea > thyme > relax tea > absinthium > roselle > olive leaves
> sage > shrubby blackberry. It was determined that adding flavoring substances such as lemon, bergamot, clove and cinnamon,
which are commonly used in preparation of black tea in Turkey resulted to have synergistic effect on total antioxidant activities
of black and peppermint teas. The highest hydrogen peroxide inhibition value (65.50%) was obtained for green tea at a 250 μl/ml
concentration. The H2O2 scavenging activity of herbal teas decreased in the order green tea > peppermint > relax tea > black tea > thyme > olive
leaves > sage > absinthium > shrubby blackberry > roselle. In particular, their phenolic compounds and antioxidant activities
may be useful for meal planning in type 2 diabetes. They could contribute to sustain plasma antioxidant level because antioxidants
present in plants and herbs prevent the development of vascular diseases seen in type 2 diabetes. 相似文献
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<中国麻类作物栽培学>等著作和一些论文中有关国产苎麻属植物分类存在一些分歧,本文分析了分歧产生的原因,并对<中国麻类作物栽培学>中苎麻属分类学问题进行了探讨. 相似文献
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利用高效液相色谱测定了三个地点的大豆品种合丰25与Bayfield及其衍生的144个重组自交系种子中的维生素E含量,运用主基因+多基因混合遗传模型,对三个地点的大豆种子的维生素E进行了遗传分析。结果表明：在哈尔滨地区α-生育酚为 2对主基因+多基因遗传模型;γ-生育酚为1对主基因+多基因遗传模型;δ-生育酚为 2对主基因+ 多基因遗传模型;在呼兰地区α-生育酚为3对主基因+多基因遗传模型;γ-生育酚为2对主基因+多基因遗传模型;δ-生育酚为 2对主基因+多基因遗传模型;在绥化地区α-生育酚为无主基因+多基因遗传模型;γ-生育酚为3对主基因+多基因遗传模型;δ-生育酚为 2对主基因+多基因遗传模型。 相似文献
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采用9个热带、温带群体和4个优良自交系进行NCⅡ设计,配制36个杂交组合,在河南安阳中棉所试验基地进行了两年的田间鉴定,了解9个群体和4个自交系的配合力及其杂种优势关系,鉴定其应用价值和利用潜力,研究群体种质及群体×测验种互作的遗传效应及其杂种优势关系。结果表明：群体Suwan1和SG C4的一般配合力（GCA）表现最为突出;自交系HZ111在黄淮海地区有潜在的利用价值;WBMC4×丹340、辽旅群体×掖478、憨头苞谷×掖478、辽旅群体×美22和BSSS C9×HZ111的特殊配合力（SCA）表现突出;群体×测验种的互作对总方差的贡献最大。根据产量特殊配合力划分杂种优势群切实可行,利用地理和种质基础远缘的群体材料与国内系组配,获得强优势组合的机会增加,群体的利用效率明显加大。 相似文献
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&&国际水稻所品种的抗性、熟期和稻米品质@J、C、Flinn
@L、J、Unnevehr
$湖南农学院农学系@盛孝邦 相似文献
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粮饲通用型玉米产量高品质优良，在生产上应用越来越广泛。为探讨其适宜种植密度，以4个粮饲通用型玉米品种登海605、登海圣丰168、青农118和天泰366为试验材料，研究4个种植密度(4.5×104、6.75×104、9×104和11.25×104株/hm2)对粮饲通用玉米产量和饲用品质的影响。结果表明，在一定范围内随着种植密度的增加，玉米的鲜草和干草产量呈增加的趋势。种植密度对中洗涤纤维影响不显著，对酸性洗涤纤维、粗蛋白、淀粉和粗脂肪的影响在不同品种间变化趋势不一致。综合生物产量和粗饲料分级指数，在黄淮海地区天泰366和登海605推荐种植密度分别为9×104株/hm2和11.25×104株/hm2，青农118和登海圣丰168推荐种植密度为9×104～11.25×104株/hm2。 相似文献
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利用ISSR分子标记技术分析了油菜黑胫病菌（Leptosphaeria biglobosa）的遗传多样性。分离获得国内菌株84株,并以15株国外(英国、加拿大、波兰)油菜黑胫病菌菌株作为参照,利用筛选出的24条引物对这99株病原菌进行ISSR-PCR扩增。共扩增出245条带,遗传相似性系数为0.65~1.00,国内和国外油菜黑胫病菌菌株很明显被分为两个菌群,中国84株菌基本按地理来源分为5个类群,只有江苏省菌株分布于各个类群。各省的Nei’s基因多样性指数范围是0.108 1~0.252 7,而香农(Shannon’s)信息指数的范围是0.157 5~0.372 6,顺序为江苏>湖北>安徽>内蒙古>上海>四川。其与英国和加拿大菌株的遗传一致度分别为0.834 3和0.783 9。 相似文献
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2019～2020年以陕单 650(中熟)和东单 60(晚熟)为材料,设置 4个种植密度 6.0×104、 7.5×104、 9.0×104和10.5×104株/hm2,研究密度对玉米产量及子粒含水率的影响。结果表明,增密可以提高不同熟期玉米品种的产量,陕单 650在密度为 9.0×104株/hm2时最优产量为 18 083.5 kg/hm2,东单 60在密度 7.5×104株/hm2时最优产量为17 472.9 kg/hm2。两个品种粒重及子粒含水率随密度的增大而减小,陕单 650达到最大灌浆速率的天数、平均灌浆速率较东单 60均早 4 d和高 0.06 g/d;陕单 650和东单 60子粒平均脱水速率为 0.98%/d和 0.93%/d,陕单 650在生理成熟 4 d后子粒含水率迅速降至 25%。当密度为 9.0×104株/hm2时,陕单 650的叶片干物质转运率明显高于东单 60。通过适度增密提高产量、缩短生育期降低子粒水分的技术途径,协同实现陕西春玉米密植高产机械子粒收获生产。 相似文献