共查询到19条相似文献，搜索用时 312 毫秒
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壳聚糖涂膜在香蕉保鲜中的应用 总被引：9，自引：1，他引：9
壳聚糖（Chitosan）是α-氨基-D-葡胺糖，由甲壳素通过脱乙酰制得。壳聚糖具有无毒，成膜好，抗菌谱广等特点，在果蔬保鲜方面受到高度重视。壳聚糖可在果蔬表面形成一层薄膜来调节果蔬采后的生理代谢并对微生物有抑制作用，壳聚糖对杨梅、番木瓜、草莓、苹果、桃、梨、猕猴桃、龙眼、黄瓜、青椒等均有不同程度的保鲜作用。目前国内未见有壳聚糖在香蕉采后保鲜上应用的报道。为此，笔者进行了壳聚糖涂膜对香蕉保鲜效果试验，旨在为壳聚糖在果蔬采后保鲜中的应用提供依据。 相似文献
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壳聚糖涂膜对“台农1号”丰亡果保鲜效果研究 总被引：1，自引：0，他引：1
壳聚糖（chitosan）是α氨基-D-葡胺糖，由甲壳素通过脱乙酰制得。壳聚糖以无毒、成膜好、抗菌性能广等特点，在果蔬保鲜方面受到高度重视。壳聚糖可在果蔬表面形成一层薄膜来调节果蔬采后的生理代谢并对微生物有抑制作用，壳聚糖对杨梅、番木瓜、草莓、苹果、桃、梨、猕猴桃、龙眼、黄瓜、青椒等均有不同程度的保鲜作用。笔者进行了在常温下壳聚糖涂膜对丰亡果的保鲜效果试验，旨在为壳聚糖应用于果蔬采后保鲜提供理论依据。 相似文献
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济南果品院是中华全国供销合作总社直属科研院所，自1980年建院以来，长期从事果蔬采后深加工技术、果蔬保鲜技术和食用菌技术开发研究，形成了较为完善的科研开发力量和配套实用的科研设施。多年来，济南果品研究院面向市场搞科研开发，大力开展科技成果转化和以科技优势服务“三农”，在果蔬浓缩汁生产工艺、果蔬啤酒基料开发、果蔬保鲜材料开发等方面，引领了行业的技术进步，在我国果蔬采后技术行业树立了良好的科研品牌形象。 相似文献
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保鲜贮藏是保持果蔬产品鲜活品质秘营养价值的主要手段。从事果蔬产品保鲜贮藏者，最终目标是获取经济效益。从技术角度探讨，影响果蔬产品保鲜贮藏效益的因素主要有4方面，即保鲜设施的整体水平；果蔬产品的属性；保鲜技术和保鲜效果，经营管理水平等。 相似文献
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《中国果菜》2014,(6):62-62
近日，广东省科技厅主持召开了由中国科学院华南植物园等单位完成的“南方特色果蔬的贮运保鲜机制与关键技术”成果鉴定会。 该项目成果由华南植物园果蔬采后生物学研究组牵头，联合华南农业大学、广州市农业科学研究院科相关科研人员历时5年完成。项目在南方特色果蔬采后衰老和品质劣变机制研究方面，揭示了生物大分子氧化在衰老和果实质地劣变中的作用；明确了NO信号分子在调控果实衰老和劣变中的作用机理；阐明了能量亏损引发果实衰老和褐变的机制；明确了果蔬在不同贮藏条件下品质变化规律和生理应答机制。发明了柑橘酸腐病控制和带叶保鲜、荔枝无硫防褐变防腐综合保鲜、蔬菜衰老和冷害控制、葡萄无硫综合保鲜等特色果蔬安全保鲜新技术；研发了新的植物源防腐保鲜剂及其配套应用技术，显著减少了柑橘、荔枝、杨梅、葡萄、番木瓜、菜心、黄秋葵等特色果蔬采后损失，减少化学杀菌剂使用，保持了果蔬的品质与安全。 相似文献
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空气放电果蔬保鲜技术是由华中理工大学数十位教授、博士在承担国家“七五”科技攻关项目中开发完善的实用新技术。这是一种以高科技发明专利为基础的现代贮藏保鲜技术，区别于传统的各种保鲜方法，不用任何化学药剂和辐射，具有无毒无害，不污染食品和环境的突出优点，是一种真正高效、节能、方便的环保技术。 相似文献
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AIM: To investigate the anti-adenovirus effect of cinnamaldehyde in vitro. METHODS: The anti-adenovirus effect of cinnamaldehyde was measured by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) method and virus proliferation inhibition experiment. The expression of hexon protein was measured by immunohistochemistry. RESULTS: The results of MTT and virus proliferation inhibition experiment showed that cinnamaldehyde enhanced the survival rate of the host cells, and decreased adenovirus titer by the ways of direct virus inactivation, anti-adenovirus in the stage of biosynthesis and adsorption of the adenovirus. The viability of the host cells had a positive correlation with the drug concentration under the condition of virus infection. Cinnamaldehyde did not block the virus uptake into host cells, and did not protect the host cells from infection. The expression of hexon protein was significantly lower (P<0.05) in cinnamaldehyde group than that in virus group.CONCLUSION: Cinnamaldehyde has anti-adenovirus effect, but can not directly protect host cells. The anti-adenovirus effect of cinnamaldehyde may be related with the inhibition of hexon protein expression. 相似文献
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Glucocorticoids are necessary for stress response and universally used as anti-inflammatory agents. However, recent studies indicate that glucocorticoids not only enhance the pro-inflammatory effect of stress in the brain but also aggravate brain inflammation when glucocorticoid level is chronically elevated or abnormally increased. In addition, inflammatory response has detrimental effects on the repair of injury in the brain and contributes to several neuropsychiatric diseases. Accordingly, the capacity of glucocorticoids to augment inflammation in the brain deserves further investigation for effective clinical attenuation of brain inflammation. In this paper, we review recent advances in the characteristics and the possible mechanisms of the pro-inflammatory effect of glucocorticoids in the brain. 相似文献
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AIM: To study the effect and mechanism of chlorophyllin (CHL) inhibiting HT29 cells. METHODS: IC50 value and growth curve of HT29 cells were detected with MTT method. Apoptosis was detected with Wright-Giemsa staining, FCM and DNA electrophoresis. Telomerase was detected by PCR-ELISA, and protein and mRNA expression of COX-2 gene were detected through RT-PCR and Western blot. RESULTS: CHL inhibited the growth of HT29 in a dose-dependent manner. CHL blocked HT29 cells in G1 phase but did not induce apoptosis. Different concentration of CHL inhibits the expression of telomerase and COX-2 in HT29 cells. CONCLUSION: CHL inhibited the growth of HT29 cells by inhibiting the expression of telomerase and COX-2 and blocking cells in G1 phase. 相似文献
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随着社会不断发展,人们对植物的观赏要求越来越高,常见的矮化的药物:多效唑和B9,由于B9中含有大量的致癌物质,B9我国已经列入违禁药品。B9在农业上已经基本很少使用。虽然B9在花卉园艺上还在使用,但在短期内会禁止使用。由此可见,多效唑在园艺上有着不可替代的地位。 相似文献
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AIM:To investigate the antidepressant effect of dextromethorphan (DXM) and its mechanism. METHODS:The antidepressant effect of DXM was observed by the methods of forced swimming test, tail suspension test and open field test. The N-methyl-D-aspartate (NMDA) receptor activity in brain, and the effects of total nitric oxide synthases (NOS) and various types of NOS were examined by molecular biology methods. The mice pretreated with NMDA receptor antagonist MK-801 (MK), NMDA, NO precursor L-arginine (L-ARG), endothelial NOS (eNOS) inhibitor Nω-nitro-L-arginine methyl ester (L-NAME), inducible NOS (iNOS) inhibitor aminoguanidine (AG), neuronal NOS (nNOS) inhibitor 7-nitroindole (7-NI) or phosphodiesterase 5 inhibitor sildenafil were given DXM to explore the mechanism of DXM as an antidepressant. RESULTS:DXM had a dose-dependent antidepressant effect. DXM inhibited the activity of brain NMDA receptor in a dose-dependent manner, and inhibited the expression of eNOS and nNOS. MK, L-NAME and 7-NI were able to promote the antidepressant effect of DXM. NMDA, L-ARG and sildenafil were able to inhibit the antidepressant effect of DXM. AG did not influence the antidepressant effect of DXM. CONCLUSION:DXM has an antidepressant effect, and NMDA receptor and L-ARG-NO-cGMP signaling pathways are involved in this process. 相似文献
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Atherosclerosis has been considered as one of inflammatory disease. Besides its action on vasomotor tone regulation, nitric oxide (NO) is recognized to be an anti-inflammatory molecule. The anti-inflammatory effects of NO are attributable to inhibition of nuclear factor kappa B activation. 相似文献
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An examination of the coordination of ripening changes in plantain fruits (Musa AAB, cultivar ‘Apem’) showed that water stress had no effect on the respiratory rate at the climacteric maximum nor on the time between initiation and maximum. Similarly, water stress had little or no effect on the coordination of changes in CO2 and C2H4 evolution, although it slightly increased the magnitude of C2H4 production and of the ACC content of the pulp. Stressed and unstressed fruits showed similar synchronised ripening changes after 2 and 3 days from the commencement of the climacteric. However, after 1 day, peel colouration, pulp softening and total soluble solids were less in stressed than in unstressed fruits. The results are discussed in the light of reported work on dessert bananas (Musa AAA cultivars). 相似文献