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<正>硒是人体必须的微量元素,现代医学研究表明,适量补硒有增强机体免疫力、延缓衰老、抗癌防癌的奇特效果。实践证明,富硒苹果具有多重生理保健功能,生产富硒苹果有广阔的发展前景。现将其生产技术与发展前景介绍如下,供参考。1富硒苹果栽培技术笔者通过对彬县党建群苹果专业合作社富硒苹果 相似文献
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据有关专家预测 ,我国入世后将给以下 7种农产品带来出口优势。甘薯茎尖嫩叶 甘薯茎尖嫩叶中富含维生素、蛋白质、微量元素、可食性纤维和可溶性无氧化物质 ,并有益于减肥、健美和健身防癌等作用 ,开发前景极好。富硒农产品 为了满足人们新的消费需求 ,科研人员除了开发、培育出本身富含硒元素的青仁乌豆、魔芋等农产品 ,还通过给农作物追施、喷施或注射富硒元素的肥料等多种方法 ,从而陆续获得富硒苹果、富硒石榴、富硒大葱等富硒农产品。这些富硒农产品一问世就走俏市场。特色甘薯 甘薯营养丰富 ,有延缓衰老的作用 ,对消化道、心脑血管… 相似文献
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富硒蔬菜的研究与开发 总被引:9,自引:1,他引:8
硒是人体必需的微量元素,现代医学研究表明,适量补硒有增强机体免疫力,延缓衰老,抗癌防癌的奇特效果,因此被营养学和医学家誉为“生命的奇效元素”和“抗癌之王”的美称。地球表面硒的含量很少,且分布极不均衡。有关资料报道我国东部沿海、西北及青藏高原等广大范围都有大面积严重缺硒地区,缺硒省份达22个,有82%的县(市)是低硒或缺硒区。人类有40多种疾病与缺硒有关。因此营养学、食品学、医学和农学等专家强调指出,硒与人体健康有直接关系,开发富硒食品、药品势在必行。我国和世界许多国家在富硒食品的研究开发中做了大量卓有成效的工作,目前已开发 相似文献
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The effects of combinations of salinity (no salt, 2000 p.p.m. or 4000 p.p.m. of CaCl2 and NaCl, 1:1) and water table (30 cm, 60 cm or 90 cm from the soil surface), on the vegetative growth and tolerance of ‘Golden Japanese’ plum and ‘Mit Ghamre’ and ‘Balady’ peaches were studied. The plants were grown in lysimeters. The growth of the trunk, total shoot length, the increase in shoot length per cm and the fresh weight of top, root and total plant were reduced with increasing salinity of the irrigation water. The effect was accentuated when the plants were maintained at high water table level. The salinity treatments resulted in the death of 43%, 73% and 76% of the plants in the plum, and the ‘Mit Ghamre’ and ‘Balady’ peaches, respectively, indicating that the plum is more tolerant to salinity than the peach. The plants of the salinity treatments showed various symptoms of salt injury, such as leaf burn, defoliation, shoot die-back and finally death. In the peaches, salt injury started to occur in the first growing-season, whereas the salt injury appeared in the plum in the second growing-season. The symptoms were more pronounced in the 4000 p.p.m. treatment than in the 2000 p.p.m. treatment and were more pronounced at the high water table level. The salinity level was the predominant factor and the effect of the water table on the vegetative growth diminished with increase in the salinity level of the irrigation water. 相似文献
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AIM:To establish a fast, accurate and economical technique for culturing mouse pulmonary arteriolar smooth muscle cells (PASMCs), and to explore the effects of hypoxia on the proliferation and apoptosis of the PASMCs. METHODS:In sterile condition, the pulmonary artery was isolated from the male BALB/c mice by digesting with collagenase I, and the cells were cultured in fetal bovine serum-coated flask. Centrifugal procedure was not used during the cell passage. The cell morphology was observed under an inverted phase-contrast microscope. α-Smooth muscle actin was identified by immunocytochemistry and immunofluorescence. The effects of hypoxia on the proliferation and apoptosis of the PASMCs were detected by CCK-8 assay and TUNEL assay. RESULTS:PASMCs were identified by the methods of immunocytochemistry, immunofluorescence staining and observation of morphology. Unlike the rat PASMCs with typical subcultured peak-vally pattern, the mouse PASMCs showed a lot different without a peak-vally pattern. The cells could be subcultured after 5 d to 7 d and there was 3 to 5 generations depending on the activity of the cells. CCK-8 assay demonstrated that the A values of PASMCs exposed to hypoxia increased after 24 h (P<0.05) as compared with normoxia. TUNEL result showed that the apoptotic index of the PASMCs in hypoxia decreased after 24 h (P<0.05). CONCLUSION:This technique for obtaining cultured mouse PASMCs is simple, fast, accurate and economical. The digestion time is easy to control. Hypoxia promotes the proliferation and inhibits the apoptosis of PASMCs. 相似文献
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小檗碱和壳聚糖抗蔬菜病原真菌活性测定及复合膜制备 总被引:2,自引:0,他引:2
研究了小檗碱和壳聚糖对几种常见蔬菜病原真菌的抑制活性,以及以小檗碱和壳聚糖为主料制备复合膜的方法,并测定了该膜的药物释放效果。试验表明:低浓度(0.234 mg/mL)小檗碱即可抑制辣椒炭疽病菌(Vermicularia capsici)等5种蔬菜病原真菌的生长。20 mg/mL浓度壳聚糖对番茄灰霉病菌(Botrytis cinerea)的抑制率高达65%,而对其余4种果蔬病原真菌也有一定的抑制作用。为了集成这2种天然化合物的优点,制备了小檗碱-壳聚糖复合膜,该膜具有缓释功能,在模拟外部环境(磷酸缓冲液,pH 6.8)条件下,20 d小檗碱累计释放率接近25%,提示其在果蔬贮藏抗菌中的应用价值。 相似文献
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钾肥在小白菜和萝卜上的施用效果 总被引:6,自引:0,他引:6
采用盆栽试验方法研究了施用钾肥对小白菜、萝卜生长发育、产量、品质及钾素含量的影响。结果表明 ,施用钾肥对小白菜和水萝卜的株高、叶片数无显著的影响 ,但可提高水萝卜块根的产量 ,提高幅度为 31.0 4 %~ 97.93%。施用钾肥可提高小白菜和萝卜的蛋白质和VC含量 ,降低硝酸盐含量 ,增加植株的钾素含量 相似文献
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Fresh onion seeds desiccated to 6.0% seed moisture content (SMC) were stored in various packaging materials under different storage conditions. Seeds packed in aluminum-laminated pouches beside those stored with silica gel at 25 °C maintained satisfactory germinability and vigour after 12 months. Desiccated seeds stored in moisture impervious containers produced more vigourous seedlings. Germination potential of onion seeds increased with reduced SMC besides storage in moisture impervious packets along with desiccants as physiological and biochemical attributes are regulated. Seed viability and vigour decreased with accelerated ageing due to increased lipid peroxidation, decreased activities of several free radical and peroxide scavenging enzymes. Electrical conductance of seed leachates also increased with ageing. Thus, adoption of appropriate storage temperature and moisture control techniques would significantly affect onion seed quality, which was due to minimum accumulation of free peroxide radicals and enhanced activity of free radical scavenging enzymes. 相似文献
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