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Pomological, Organoleptic and Biochemical Characterizations of Tunisian Pomegranate Fruits <i>Punica granatum</i>L. 预览
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作者 Manel Mekni Wafa Kharroubi +1 位作者 Imed Cheraief Mohamed Hammami 《美国植物学期刊(英文)》 2019年第7期1181-1195,共15页
Pomological characterization and biochemical study were conducted on five pomegranate fruits cultivars. Results show statistically significant difference between varieties. Indeed, pomegranate seeds play a key role in... Pomological characterization and biochemical study were conducted on five pomegranate fruits cultivars. Results show statistically significant difference between varieties. Indeed, pomegranate seeds play a key role in determining the pomological quality of the fruit. Interestingly, Kalai ranks first with 256.06 g of the mass of fresh seeds which has 73% of the Total fresh weight (TFW). Besides, the mass of fresh seeds and TFW showed a significant negative correlation with the percentage of fresh peel (r = -0.987 and r = -0.930, respectively, p ). Parallelly, two major sugars were detected in seeds: glucose, fructose followed by arabinose. Meanwhile, malic and citric acids are both main organic acids accumulated in pomegranate seeds. By determining the acidity index “AI”, citric acid was found to be the most predominant organic acid in sour pomegranate varieties like Kalai and Garsi. Though, Tounsi and Zahri variety are the sweetest, thus, having least amounts of citric acid and highest AI levels. 展开更多
关键词 POMEGRANATE Seeds PEEL Organic Acids Sugars ACIDITY Index
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Potential Technological Use of Reserves of <i>Jatropha curcas</i>and <i>J. macrocarpa</i>Griseb. Seeds 预览
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作者 Nancy E. de las M. Tavecchio Marta S. Dardanelli +4 位作者 Yanina B. Reguera Herminda E. Reinoso Oscar A. Terenti Marisa M. Garbero Hilda E. Pedranzani 《美国植物学期刊(英文)》 2019年第8期1444-1456,共13页
J. curcas and J. macrocarpa are useful for restoring degraded areas and their seeds contain oils for biodiesel production. The aim of the work was to determine the reserve substances in the endosperm and the embryo of... J. curcas and J. macrocarpa are useful for restoring degraded areas and their seeds contain oils for biodiesel production. The aim of the work was to determine the reserve substances in the endosperm and the embryo of J. curcas and J. macrocarpa which is important in understanding the germination process, the establishment of these species and its industrial employment. Seeds were imbibed in distilled water for 24 h, to facilitate removal of seed coat with the aim to separate the embryo and nutritive tissues. In both species, the endosperm contained aleurone grains consisting of a crystalloid and globoid, lipids of red color and the starch was not observed. Four major fatty acids were determined in J. curcas seed: oleic, palmitic, stearic, palmitoleic and oleic fatty acid represents about 70% oil content. Oleic acid was the most abundant in J. macrocarpa seeds, while, there was not palmitoleic acid. Seed with predominantly unsaturated fatty acids is ideal for biodiesel industry. The means of the sugar content were: 14.3 μg/mg in endosperm and 104.76 μg/mg in embryo of J. curcas and 6.48 μg/mg in endosperm and 59.20 μg/mg in embryo of J. macrocarpa. The means of the protein content were: 4.2 μg/mg in endosperm and 45.02 μg/mg in embryo of J. curcas and 3.26 μg/mg in endosperm and 31.08 μg/mg in embryo of J. macrocarpa. Sugar and protein contents of Jatropha seeds were significantly higher in embryo in both species (p 0.1), which suggests early mobilization towards the embryo during imbibition period. 展开更多
关键词 Fatty Acids J. curcas J. macrocarpa Proteins SEEDS Sugars
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Induction of desiccation tolerance in desiccation sensitive Citrus limon seeds^oo
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作者 Alexandre Marques Harm Nijveen +2 位作者 Charles Somi Wilco Ligterink Henk Hilhorst 《植物学报:英文版》 SCIE CAS CSCD 2019年第5期624-638,共15页
Many economically important perennial species bear recalcitrant seeds, including tea, coffee, cocoa, mango,citrus, rubber, oil palm and coconut. Orthodox seeds can be dried almost completely without losing viability, ... Many economically important perennial species bear recalcitrant seeds, including tea, coffee, cocoa, mango,citrus, rubber, oil palm and coconut. Orthodox seeds can be dried almost completely without losing viability, but so-called recalcitrant seeds have a very limited storage life and die upon drying below a higher critical moisture content than orthodox seeds. As a result, the development of longterm storage methods for recalcitrant seeds is compromised.Lowering this critical moisture content would be very valuable since dry seed storage is the safest, most convenient and cheapest method for conserving plant genetic resources.Therefore, we have attempted to induce desiccation tolerance(DT) in the desiccation sensitive seeds of Citrus limon. We show that DT can be induced by paclobutrazol(an inhibitor of gibberellin biosynthesis) and we studied its associated transcriptome to delineate the molecular mechanisms underlying this induction of DT. Paclobutrazol not only interfered with gibberellin related gene expression but also caused extensive changes in expression of genes involved in the biosynthesis and signaling of other hormones. Paclobutrazol induced a transcriptomic switch encompassing suppression of biotic-and induction of abiotic responses.We hypothesize that this is the main driver of the induction of DT by paclobutrazol in C. limon seeds. 展开更多
关键词 economically important RECALCITRANT SEEDS PACLOBUTRAZOL in C. limon SEEDS
Antidiabetic effect of Opuntia dillenii seed oil on streptozotocin-induced diabetic rats
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作者 Mohamed Bouhrim Hayat Ouassou +6 位作者 El Hassania Loukili Mohammed Ramdani Hassane Mekhfi Abderrahim Ziyyat Abdelkhaleq Legssyer Mohammed Aziz Mohamed Bnouham 《亚太热带生物医学杂志:英文版》 CAS 2019年第9期381-388,共8页
Objective: To assess the antidiabetic effect of Opuntia dillenii seed oil on rats with diabetes mellitus. Methods: A rat diabetes model was established by intraperitoneal injection of rats with 50 mg/kg streptozotocin... Objective: To assess the antidiabetic effect of Opuntia dillenii seed oil on rats with diabetes mellitus. Methods: A rat diabetes model was established by intraperitoneal injection of rats with 50 mg/kg streptozotocin. Thirty albino Wistar rats were divided into five groups: the diabetic control group and normal control group were treated only with distilled water, two diabetic groups received 1 and 2 m L/kg of oil per day, respectively, for 30 days and one diabetic group received 2 mg/kg of glibenclamide. In addition, blood glucose was determined weekly. Body weight, average daily food, water intake and urinary volume of each animal were determined before and after the treatment period. After the treatment period, hepatic glycogen was determined using the anthrone reagent, and glycosuria, total cholesterol, triglycerides, alanine aminotransferase, aspartate aminotransferase, urea, creatinine and uric acid were estimated using common clinical diagnostic kits. Results: Oral intake of the oil at 1 and 2 m L/kg for the diabetic animals significantly diminished blood glucose, glycosuria, total cholesterol, triglycerides, alanine aminotransferase, aspartate aminotransferase, urea, creatinine and uric acid, accompanied by a noticeable elevation in the amount of hepatic glycogen in comparison with the diabetic control group. Similarly, Opuntia dillenii seed oil significantly increased the food intake and decreased the urinary volume per day in treated rats of the same groups in comparison with the period before the treatment intervention and attenuated body weight loss in the diabetic rats. Moreover, this effect of the oil was dose dependent. On the other hand, the oil did not affect their need for water. Conclusions: The results show that Opuntia dillenii seed oil has a very important antidiabetic effect on streptozotocin-induced diabetic rats. Hence, we suggest it as a preventive control of diabetes mellitus. 展开更多
关键词 OPUNTIA dillenii SEEDS oil STREPTOZOTOCIN DIABETES Rats BIOCHEMICAL parameters
Phytochemical studies and anti-ulcerative colitis effect of Moringa oleifera seeds and Egyptian propolis methanol extracts in a rat model
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作者 Attia H.Atta Samar M.Mouneir +4 位作者 Soad M.Nasr Doaa Sedky Amany M.Mohamed Shimaa A.Atta Hassan Mohamed Desouky 《亚太热带生物医学杂志:英文版》 CAS 2019年第3期98-108,共11页
Objective: To analyze the phytochemical constituents, and to explore potential protective effect of the methanol extract of Moringa oleifera(M. oleifera) seeds and Egyptian propolis, each alone or concurrently adminis... Objective: To analyze the phytochemical constituents, and to explore potential protective effect of the methanol extract of Moringa oleifera(M. oleifera) seeds and Egyptian propolis, each alone or concurrently administered on acetic acid-induced ulcerative colitis in rats. Methods: Eight groups of 5 rats each were used: normal control group with distilled water, model group, two groups with M. oleifera seeds(100 and 200 mg/kg), two groups with propolis(50 and 100 mg/kg), one group with concurrent administration of both, and one group with prednisolone(reference drug). Macro-and microscopic picture, ulcer index and lesion scores, oxidative markers, inflammatory mediators, in vitro activity of the inflammatory enzymes and 1, 1-diphenyl-2-picrylhydrazyl free radicals scavenging activity were evaluated. The phytochemical constituents of both extracts were explored by GC-MS analysis. Results: Both treatments modulated the macro-and microscopic picture, decreased the ulcerative index, lesion score, oxidative markers and inflammatory mediators, and inhibited the COX-1 and COX-2 enzymes. Propolis appeared to be powerful free radicals scavenger. A powerful synergistic effect of both treatments in modulating the course of the disease was reported. GCMS analysis of methanol extract of M. oleifera seeds and propolis revealed the presence of 50 and 34 compounds, respectively. Conclusions: M. oleifera seeds and propolis methanol extracts have modulated the course of acetic acid-induced ulcerative colitis. Moreover, both treatments induce a good synergistic effect against the disease. Isolation of the active constituents is recommended. 展开更多
关键词 Moringa oleifera SEEDS PROPOLIS ULCERATIVE colitis PHYTOCHEMICAL
民族药大丁草种子萌发特性研究 被引量:1
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作者 谭云飞 王世清 +3 位作者 严福林 杜富强 李林龙 魏升华 《北方园艺》 CAS 北大核心 2019年第5期131-137,共7页
为探索贵州民族药大丁草种子的萌发特性,以大丁草种子为试验材料,通过对基质、温度、光照、浸种时间、激素浓度等条件设置不同处理,研究不同条件对其种子萌发特性的影响。结果表明:不同基质对种子萌发率有明显的影响,萌发率由高到低的... 为探索贵州民族药大丁草种子的萌发特性,以大丁草种子为试验材料,通过对基质、温度、光照、浸种时间、激素浓度等条件设置不同处理,研究不同条件对其种子萌发特性的影响。结果表明:不同基质对种子萌发率有明显的影响,萌发率由高到低的基质依次为河沙、滤纸、脱脂棉+滤纸、脱脂棉、纱布;不同温度对种子萌发影响显著(P<0.05),20℃时萌发率最高,10℃时萌发率最低;周期性光照(光照12 h/黑暗12 h)条件下比全光照和全黑暗条件下萌发率高、萌发速度快;浸种24 h是萌发效果最佳;能够有效促进大丁草种子萌发的赤霉素、萘乙酸和水杨酸的浓度分别为50、10、50 mg·L-1。大丁草萌发的适宜基质为河沙,适宜温度为20~25℃,适宜的光照条件为周期性光照,适宜的浸种时间为24 h,适宜的赤霉素、萘乙酸和水杨酸的浓度分别为50、10、50 mg·L-1。 展开更多
关键词 大丁草 种子 萌发特性 民族药
基于模糊隶属函数法评价苦荞不同栽培品种种子质量 预览
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作者 朱丽伟 石桃雄 +5 位作者 黄凯丰 黄娟 邓娇 蔡芳 张锦阁 陈庆富 《贵州师范大学学报:自然科学版》 CAS 2019年第1期53-58,85共7页
以分别采收于云南、青海的12个常规苦荞品种为试验材料,运用模糊隶属函数法分析其种子的千粒重、纯度、穗萌发率、发芽率、发芽势、发芽指数、活力指数及平均发芽时间,并评价其种子质量。结果显示:青海和云南的12个品种纯度均高于96%;... 以分别采收于云南、青海的12个常规苦荞品种为试验材料,运用模糊隶属函数法分析其种子的千粒重、纯度、穗萌发率、发芽率、发芽势、发芽指数、活力指数及平均发芽时间,并评价其种子质量。结果显示:青海和云南的12个品种纯度均高于96%;青海的10个品种千粒重大于20g,云南的只有6个品种千粒重大于20g;青海有5个品种存在穗萌发现象,云南有9个品种存在穗萌发现象,其中穗萌发最严重的是‘六苦04’,两地种子穗萌发率均在4.0%以上;贮藏半年后,青海采收的‘黔苦6号’、‘黔苦5号’、‘苦荞1307-893’、‘晋苦荞6号’、‘云荞2号’、‘六苦04’、‘云荞1号’、‘川荞3号’、‘酉苦1号’和‘晋苦荞2号’仍具有种用价值,而采自云南的‘黔苦6号’和‘六苦04’则失去种用价值。结论:模糊隶属函数法可用于苦荞种子质量分析,多数苦荞品种在青海种植时种子质量更佳,采自云南的‘酉苦1号’表现最好,两地种植时评分均较高的品种为‘晋苦荞2号’和‘酉苦1号’。 展开更多
关键词 苦荞 种子 活力 穗萌发
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层积、激素和光照对千屈菜种子萌发的影响 预览
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作者 徐小博 王英哲 +1 位作者 闫冬 徐博 《草地学报》 CAS CSCD 北大核心 2019年第3期775-778,共4页
本实验通过对千屈菜(Lythrum chiesas L.)种子进行冷层积处理、改变日光照时数以及使用不同浓度的赤霉素、细胞分裂素溶液浸泡种子,通过测定种子的发芽率、发芽势,研究以上因素对种子萌发的影响。结果表明:冷层积对种子萌发的影响不显著... 本实验通过对千屈菜(Lythrum chiesas L.)种子进行冷层积处理、改变日光照时数以及使用不同浓度的赤霉素、细胞分裂素溶液浸泡种子,通过测定种子的发芽率、发芽势,研究以上因素对种子萌发的影响。结果表明:冷层积对种子萌发的影响不显著,在24h光照时分别使用100mg·L^-1,200mg·L^-1,300mg·L^-1浓度的赤霉素、细胞分裂素溶液浸泡对种子的萌发均有不同程度的影响,且以光照24h、使用200mg·L^-1的赤霉素溶液浸泡种子为最佳处理方法。在16h光照时,用100mg·L^-1,200mg·L^-1,300mg·L^-1浓度的赤霉素、细胞分裂素溶液浸泡均对种子萌发影响不显著。可得出千屈菜种子对激素刺激、光照刺激敏感,对冷层积刺激不敏感的结论。 展开更多
关键词 千屈菜 种子 激素 光照
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Boiled Seeds
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作者 卢爱龙 《初中生必读》 2019年第4期38-39,共2页
This is a story of a young man named Owen, who lived in a faraway country, and a king, who was getting old and needed to find a successor(1). The king had thought of a way to find a successor who would have courage an... This is a story of a young man named Owen, who lived in a faraway country, and a king, who was getting old and needed to find a successor(1). The king had thought of a way to find a successor who would have courage and be honest. 展开更多
关键词 Boiled SEEDS
Purification of starch and phosphorus wastewater using core-shell magnetic seeds prepared by sulfated roasting
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作者 Chunjie Du Jinsheng Yu +9 位作者 Wei Sun Haisheng Han Yuehua Hu Pan Chen Panpan Hou Runqing Liu Li Wang Yue Yang Ruohua Liu Lei Sun 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第7期4-16,共13页
Core-shell magnetic seeds with certain adsorption capacity that were prepared by sulfated roasting, served as the core of a magnetic separation technology for purification of starch wastewater. XRD and SEM results ind... Core-shell magnetic seeds with certain adsorption capacity that were prepared by sulfated roasting, served as the core of a magnetic separation technology for purification of starch wastewater. XRD and SEM results indicate that magnetite’s surface transformed to be porous α-Fe2O3 structure. Compared with magnetite particles, the specific surface area was significantly improved to be 8.361 from 2.591 m2/g, with little decrease in specific susceptibility. Zeta potential, FT-IR and XPS experiments indicate that both phosphate and starch adsorbed on the surface of the core-shell magnetic seeds by chemical adsorption, which fits well with the Langmuir adsorption model. The porous surface structure of magnetic seeds significantly contributes to the adsorption of phosphate and starch species, which can be efficiently removed to be 1.51 mg/L(phosphate) and 9.51 mg/L(starch) using magnetic separation. 展开更多
关键词 CORE-SHELL magnetic seeds SULFATED ROASTING Phosphate STARCH PURIFICATION
掌叶大黄种子特性研究及无菌培养体系的构建
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作者 黑小斌 李依民 +6 位作者 李欢 李元敏 沈霞 高静 彭亮 颜永刚 张岗 《中草药》 CAS CSCD 北大核心 2019年第18期4430-4437,共8页
目的 研究掌叶大黄种子形态和发芽特性并构建无菌苗和愈伤组织培养体系,为其快繁和次生代谢调控研究提供基础。方法 从大小、净度、千粒质量、生活力、发芽率及发芽势等方面进行10批掌叶大黄种子特性分析;利用正交试验筛选大黄无菌苗建... 目的 研究掌叶大黄种子形态和发芽特性并构建无菌苗和愈伤组织培养体系,为其快繁和次生代谢调控研究提供基础。方法 从大小、净度、千粒质量、生活力、发芽率及发芽势等方面进行10批掌叶大黄种子特性分析;利用正交试验筛选大黄无菌苗建立的消毒体系及愈伤组织诱导的激素配比;HPLC法分析无菌苗和愈伤组织中10种有效成分的含量。结果 10批不同产地来源掌叶大黄的果实及种子外观形态无显著差异,含水量、生活力、发芽率及发芽势有明显差异,和政县与渭源县大黄发芽特性最高;75%乙醇30 s、10%H2O2 15 min为大黄种子无菌苗建立的最佳消毒组合;愈伤组织诱导最佳激素为6-苄氨基腺嘌呤(1.0 mg/L)+6-糠氨基嘌呤(2.0 mg/L)+1-萘乙酸(1.5 mg/L);不同消毒剂处理种子对无菌苗10种成分的积累无显著影响(P>0.05),愈伤组织可检测出7种有效成分,含量显著低于无菌苗,大黄酚-8-O-葡萄糖苷含量较其他成分高。结论 以千粒质量、生活力、发芽率及发芽势等指标明确甘肃和政县与渭源县种子特性优良,成功建立掌叶大黄无菌苗与愈伤组织培养体系,为掌叶大黄下一步研究奠定基础。 展开更多
关键词 掌叶大黄 种子 发芽 无菌苗 愈伤组织 大黄酚-8-O-葡萄糖苷
3种芍药属植物种子不同部位成分分析 预览
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作者 邓瑞雪 杨晓 +3 位作者 屈春笑 庞叶 张江磊 刘普 《食品科学》 EI CAS CSCD 北大核心 2019年第8期141-148,共8页
目的:分析3 种芍药属植物种子不同部位化学成分,探索3 种芍药属植物种子开发及综合利用前景。方法:采用高效液相色谱、气相色谱-质谱联用及其他多种测试手段测定3 种芍药属植物种子的千粒质量、籽壳和籽仁含量、籽粕含量、籽油含量及组... 目的:分析3 种芍药属植物种子不同部位化学成分,探索3 种芍药属植物种子开发及综合利用前景。方法:采用高效液相色谱、气相色谱-质谱联用及其他多种测试手段测定3 种芍药属植物种子的千粒质量、籽壳和籽仁含量、籽粕含量、籽油含量及组成、籽壳及籽饼粕中主要化学组成及含量。结果:凤丹籽、紫斑籽和芍药籽3 种芍药属植物种子千粒质量分别为280.16、263.64 g和187.68 g;3 种芍药属植物种子籽壳含量占种子质量31%以上,籽饼粕含量占种子质量37%以上;饼粕中均含有大量的蛋白质和单萜苷类化合物,籽壳中均含有较多的纤维素、半纤维素和木质素以及低聚茋类化合物。结论:芍药籽油组成和主要不饱和脂肪酸含量与牡丹籽油非常近似,可开发为高级食用油;3 种芍药属植物种子籽壳和籽饼粕中均含有多种活性成分,具有重要的研究开发价值;油用牡丹籽饼粕和籽壳开发利用对于油用牡丹产业的健康发展具有重要作用。 展开更多
关键词 芍药属 种子 理化性质 单萜苷类化合物 低聚茋类化合物
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苦豆子表型性状多样性分析及综合评价 预览
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作者 王瑗 郁万文 +2 位作者 周凯 汪贵斌 曹福亮 《广西植物》 CAS CSCD 北大核心 2019年第9期1147-1158,共12页
该研究以自然分布的内蒙、宁夏、甘肃、新疆、陕西等23个不同地理来源(种源)的野生苦豆子种子及其播种于内蒙古鄂托克前旗同质园内的当年生植株为材料,采用方差分析、主成分分析、聚类分析等方法对种子长、宽、千粒重以及植株的叶长、... 该研究以自然分布的内蒙、宁夏、甘肃、新疆、陕西等23个不同地理来源(种源)的野生苦豆子种子及其播种于内蒙古鄂托克前旗同质园内的当年生植株为材料,采用方差分析、主成分分析、聚类分析等方法对种子长、宽、千粒重以及植株的叶长、叶宽、叶面积、叶形指数、苗高、地径及生物量等10个表型性状的多样性进行了研究。结果表明:各个表型性状种源间均呈极显著差异,其中种子表型性状的变异系数为5.24%,植株表型性状的变异系数为18.34%,表明种子性状的稳定性高于植株性状。同时,10个性状的表型分化系数均高于70%,说明苦豆子表型多样性主要来源于种源间的表型变异;各种源苦豆子种子性状的表型分化系数均值高达97.55%,且种长、千粒重分别与采集地经度、纬度和海拔等环境因子呈极显著相关性,说明种子表型性状受环境因素的影响较大;相关性分析显示,苦豆子植株性状叶长(LL)、叶面积(LA)分别与种子性状千粒重(TW)、种长(SL)和种宽(SW)有显著相关性,暗示表型性状中的可遗传变异影响;利用主成分和聚类分析对23个种源苦豆子进行综合评价,筛选出生物量较大、苗高较高、千粒重较重、叶面积较大等综合表现较好的6个种源,共分为两类,分别是DK、JY、WY、WH、ETK和YN,这为苦豆子种质资源定向开发以及选育和栽培提供了一定的理论支撑和基础材料。 展开更多
关键词 苦豆子 表型多样性 变异系数 植株 种子
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不同生长方式和籽晶切向KDP晶体的生长及性能 预览
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作者 秦梦飞 许心光 +2 位作者 王波 孙洵 程文雍 《光学精密工程》 EI CAS CSCD 北大核心 2019年第3期511-516,共6页
磷酸二氢钾(KDP)晶体是一种经典的电光材料,是目前唯一可用于惯性约束核聚变的非线性光学材料。鉴于籽晶和生长方法对KDP晶体的生长和质量具有重要的影响,本文采用传统法生长法和点籽晶快速生长法生长KDP晶体,通过改变籽晶的种类及切向... 磷酸二氢钾(KDP)晶体是一种经典的电光材料,是目前唯一可用于惯性约束核聚变的非线性光学材料。鉴于籽晶和生长方法对KDP晶体的生长和质量具有重要的影响,本文采用传统法生长法和点籽晶快速生长法生长KDP晶体,通过改变籽晶的种类及切向,不仅减少了晶体的恢复区,同时缩短了晶体的生长周期,生长出高透明度的单晶。对晶体的透过、结晶完整性及损伤等性能进行测试,结果表明,晶体在红外和可见光波段具有较高的透过率;晶体(001)面的衍射强度较强,峰形比较尖锐;相比于1-on-1方式,R-on-1处理使KDP的损伤阈值提高了1.7~2.1倍,晶体的抗损伤均匀性很高。生长的晶体具有优良的光学性能,籽晶对晶体的生长具有重要的影响。 展开更多
关键词 KDP晶体 生长方式 籽晶 光学性能 损伤阈值
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青刺果种子和油粕中的营养成分对比及酚类物质组成和抗氧化活性分析 预览
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作者 高凡丁 张成庭 蔡圣宝 《食品与发酵工业》 CAS CSCD 北大核心 2019年第2期151-158,共8页
以青刺果为研究对象,对比青刺果种子和油粕中的营养成分、酚类物质组成以及抗氧化活性。结果表明,种子的总酚和总黄酮含量显著高于油粕。但油粕中的基本营养物质成分含量较高。种子中含有12种游离氨基酸,而油粕中含有13种,经过水解,在... 以青刺果为研究对象,对比青刺果种子和油粕中的营养成分、酚类物质组成以及抗氧化活性。结果表明,种子的总酚和总黄酮含量显著高于油粕。但油粕中的基本营养物质成分含量较高。种子中含有12种游离氨基酸,而油粕中含有13种,经过水解,在种子和油粕中各检出了17种氨基酸。种子和油粕中含有14种脂肪酸(主要是油酸和亚油酸)和7种矿物质(主要是钾和钙)。在种子和油粕中总共检测出7种酚类物质(主要物质为水仙苷)。抗氧化活性的结果表明,种子和油粕都具有较好的清除自由基的能力,且清除效果与其酚类物质含量呈量效关系。此次研究结果表明,青刺果种子和油粕中含有多种营养物质及酚类物质,具有良好的抗氧化活性,可为青刺果在食品和保健品行业的综合应用提供一定的依据。 展开更多
关键词 抗氧化性 营养成分 油粕 酚类物质 青刺果 种子
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Preparation and characterization of AlN seeds for homogeneous growth 预览
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作者 Li Zhang Haitao Qi +2 位作者 Hongjuan Cheng Lei Jin Yuezeng Shi 《半导体学报:英文版》 CSCD 2019年第10期104-107,共4页
Large size AlN bulk crystal has been grown on SiC heterogeneous seed by physical vapor transport (PVT). The properties of AlN wafer were characterized by high resolution X-ray diffraction (HRXRD), Raman spectroscopy, ... Large size AlN bulk crystal has been grown on SiC heterogeneous seed by physical vapor transport (PVT). The properties of AlN wafer were characterized by high resolution X-ray diffraction (HRXRD), Raman spectroscopy, etched method and atomic force microscope (AFM). Growth mechanism of AlN crystal grown on heterogeneous SiC seeds was proposed. Crystallization quality of AlN samples were improved with the growth process, which is associated with the growth mechanism. AlN single wafer has excellent crystallization quality, which is indicated by HRXRD showing the (0002),(1012) XRD FWHM of 76.3,52.5 arcsec, respectively. The surface of the AlN wafer is measured by AFM with a roughnessof 0.15 nm, which is a promising seed for AlN homogeneous growth. 展开更多
关键词 heterogeneous GROWTH ALN SEEDS CRYSTALLIZATION quality CHARACTERIZATION
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Sowing Seeds of Development The construction of infrastructure and industrial parks under the Belt and Road Initiative is contributing to Africa's economic development
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作者 Ge Lijun 《中国与非洲:英文版》 2019年第6期44-45,共2页
The over 750-km Addis Ababa- Djibouti Railway has become a development symbol in East Africa. Built by two Chinese companies, it allows goods to be transported between the capitals of Ethiopia and Djibouti in only 12 ... The over 750-km Addis Ababa- Djibouti Railway has become a development symbol in East Africa. Built by two Chinese companies, it allows goods to be transported between the capitals of Ethiopia and Djibouti in only 12 hours, compared to seven days by road. Costs have also been slashed by 30 percent. The project is the result of an industrial chain that combines leading standards in design, financing and investment, materials, construction and management as part of the Belt and Road Initiative (BRI). 展开更多
关键词 SOWING SEEDS DEVELOPMENT DEVELOPMENT
曲酸对小麦种子萌发及幼苗生长的影响 预览
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作者 柳凯 栾昌明 +2 位作者 郭佳 刘照斌 吕建洲 《作物研究》 2019年第3期207-210,共4页
以小麦种子为试验材料,采用培养皿纸上发芽法,以清水和油菜素内酯作为对照,研究不同浓度曲酸溶液对小麦种子萌发及幼苗生长的影响。结果显示:不同浓度的曲酸溶液(50、100、200、300、400、500mg/L)处理后,小麦种子发芽势显著提高,以300m... 以小麦种子为试验材料,采用培养皿纸上发芽法,以清水和油菜素内酯作为对照,研究不同浓度曲酸溶液对小麦种子萌发及幼苗生长的影响。结果显示:不同浓度的曲酸溶液(50、100、200、300、400、500mg/L)处理后,小麦种子发芽势显著提高,以300mg/L效果最佳,优于清水对照组和20mg/L油菜素内酯处理;小麦幼苗的根长、株高、根冠比与对照组相比无显著差异;小麦幼苗的鲜重、地上部分干重、地下部分干重均有不同程度增加,浓度为200mg/L时达到峰值并高于对照组;幼苗叶绿素含量比油菜素内酯对照组高,以200mg/L促进效果最为明显。 展开更多
关键词 小麦 曲酸 种子 萌发 幼苗
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黄皮种子中香豆素类化合物的分离、鉴定及其α-葡萄糖苷酶抑制活性和全齿复活线虫致死活性研究 预览
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作者 许书慧 陈惠琴 +3 位作者 范玉娇 陈朋伟 梅文莉 戴好富 《中国药房》 CAS 北大核心 2019年第4期518-522,共5页
目的:分离、鉴定黄皮种子中香豆素类化合物,并研究其α-葡萄糖苷酶抑制活性和全齿复活线虫致死活性。方法:采用柱层析、反相硅胶柱色谱及高效液相色谱技术对黄皮种子的香豆素类化合物进行分离、纯化,并根据理化性质和氢谱(1H-NMR)、碳谱... 目的:分离、鉴定黄皮种子中香豆素类化合物,并研究其α-葡萄糖苷酶抑制活性和全齿复活线虫致死活性。方法:采用柱层析、反相硅胶柱色谱及高效液相色谱技术对黄皮种子的香豆素类化合物进行分离、纯化,并根据理化性质和氢谱(1H-NMR)、碳谱(13C-NMR)数据进行结构鉴定。分别以阿卡波糖、阿维菌素为阳性对照,采用对硝基苯基-α-D-吡喃葡萄糖苷(PNPG)法和贝曼漏斗法分别对上述化合物进行体外α-葡萄糖苷酶抑制活性和全齿复活线虫致死活性考察。结果:从黄皮种子中共分离鉴定出7个香豆素类化合物,分别为7-羟基香豆素(Ⅰ)、黄皮呋喃香豆精(Ⅱ)、Lansiumarin-C(Ⅲ)、Claucoumarin A(Ⅳ)、Clausenalansimin A(Ⅴ)、(E,E)-8-(7-羟基-3,7-二甲基-2,5-二烯基)补骨脂(Ⅵ)、Dihydroindicolactone(Ⅶ)。在质量浓度为0.25 mg/mL时,化合物Ⅰ、Ⅲ、Ⅴ的α-葡萄糖苷酶抑制率分别为(32.4±1.9)%、(37.1±6.0)%、(39.5±1.1)%;在质量浓度为2.5 mg/mL时,化合物Ⅰ、Ⅳ的线虫校正死亡率分别为50.5%、47.9%。结论:香豆素类化合物Ⅰ、Ⅲ、Ⅴ具有α-葡萄糖苷酶抑制活性,化合物Ⅰ、Ⅳ具有全齿复活线虫致死活性。其中,化合物Ⅲ、Ⅴ的α-葡萄糖苷酶抑制活性、化合物Ⅳ的全齿复活线虫致死活性均为首次发现。 展开更多
关键词 黄皮 种子 香豆素类化合物 分离 鉴定 Α-葡萄糖苷酶 全齿复活线虫
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5种禾本科草坪草种子的吸水特性 预览
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作者 江生泉 薛正帅 +2 位作者 梁建军 张易 程建峰 《河北科技师范学院学报》 CAS 2019年第1期26-32,共7页
探寻禾本科草坪草种子动态吸水规律,以5种常见禾本科草坪草种子为材料进行吸水试验,并对其进行动态回归与相关性进行分析。结果表明:禾本科草坪草种子吸水量和吸水率随吸水时间延长而增加;单位时间内吸水量表现为前9h变化幅度较大,平均... 探寻禾本科草坪草种子动态吸水规律,以5种常见禾本科草坪草种子为材料进行吸水试验,并对其进行动态回归与相关性进行分析。结果表明:禾本科草坪草种子吸水量和吸水率随吸水时间延长而增加;单位时间内吸水量表现为前9h变化幅度较大,平均增加幅度都在18.09%以上,9h后增加幅度较小,都在9.36%以下;单位时间内吸水率增加幅度随时间延长呈现先升后降的变化趋势,0~9h时间内增加幅度较大,平均增加幅度都在16.13%以上,9h之后增加幅度降低在10.23%以下。高羊茅、匍匐剪股颖、草地早熟禾、无芒雀麦种子吸水率随吸水时间的回归模型为三次函数,多年生黑麦草的为对数函数,其相关性都达到极显著水平(P<0.01)。禾本科草坪草种子不同时间段的吸水量、吸水率均达极显著正相关(P<0.01),随时间延长相关性逐渐增大,但吸水量与吸水率间均未达显著相关(P>0.05)。变异分析表明,吸水量的变异系数以吸水4h为最大(15.23%),而吸水率变异系数以吸水9h为最大(14.88%)。因此,吸水4h时的吸水量和吸水9h时的吸水率可分别衡量禾本科草坪草种子吸水量和吸水率的基因型差异。 展开更多
关键词 草坪草 种子 吸水特性
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