In order to investigate the protective effect of aloe anthraquinones on growth and development of soybean against ultraviolet B radiation stress from the morphological structure and physio-chemical indices. The result...In order to investigate the protective effect of aloe anthraquinones on growth and development of soybean against ultraviolet B radiation stress from the morphological structure and physio-chemical indices. The results showed that, stressed by the enhanced ultraviolet b radiation, the soybean gave a dwarfed plant, shrunken leaf area and decreased photosynthetic pigment, while an ascended MDA content. Spraying aloe anthraquinones effectively relieved the reductions of chloro- phyll content and biomass and decreased the production of MDA under the radia- tion of UV-B. Moreover, under the UV-B radiation, waxy substances on epidermal cells increased remarkably and the stomas showed obvious subsidence, while spraying aloe anthraquinones could maintain the structure and shape of cells similar to that under natural light, and the stomas subsidence as well.展开更多
Exposure of skin to solar ultraviolet（UV） radiation induces photo-damage.Ultraviolet B（UVB） is the major component of UV radiation which induces the production of reactive oxygen species（ROS） and plays an impor-...Exposure of skin to solar ultraviolet（UV） radiation induces photo-damage.Ultraviolet B（UVB） is the major component of UV radiation which induces the production of reactive oxygen species（ROS） and plays an impor-tant role in photo-damage.Hydrogen gas reduces ROS and alleviates inflammation.In this study,we sought to demonstrate that hydrogen-rich saline has the effect on skin injuries caused by UVB radiation.UVB radiation was irradiated on female C57BL/6 rats to induce skin injury.Hydrogen-rich saline and nitrogen-rich saline were ad-ministered to rats by intraperitoneal injection.Skin damage was detected by microscope after injury.UVB radia-tion had a significant affection in tumor necrosis factor alpha,interleukin（IL）-1β and IL-6 levels,tissue superox-ide dismutase,malondialdehyde and nitric oxide activity.Hydrogen-rich saline had a protective effect by altering the levels of these markers and relieved morphological skin injury.Hydrogen-rich saline protected against UVB radiation injury,possibly by reducing inflammation and oxidative stress.展开更多
Farmers are frequently exposed to ultraviolet（UV） radiation which causes various diseases by inducing oxidative stress.This study aimed to assess the effects of sunblock on oxidative stress in the body.Eighty-seven ...Farmers are frequently exposed to ultraviolet（UV） radiation which causes various diseases by inducing oxidative stress.This study aimed to assess the effects of sunblock on oxidative stress in the body.Eighty-seven farmers were divided into two groups：those who wore sunblock for five days and those who did not.The total antioxidant capacity（TAC） in urine,which is an antioxidant indicator,and 8-hydroxy-2-deoxyguanosine（8-OHdG） levels in urine,an oxidative stress indicator,were measured.The urinary TAC of sunblock users was significantly higher than that of non-users,but urinary 8-OHdG levels were not significantly different.Even after adjustment for potential confounders,urinary TAC was found to be markedly increased with sunblock usage.These results suggest that sunblock is effective in preventing oxidative stress among farmers.In addition,they show that urinary TAC can be used as a good effect marker of oxidative stress caused by UV exposure.展开更多
为了研究狐臭柴叶水提取液(Premna puberula Pamp.leaves water extract,PPW)对秀丽隐杆线虫的抗衰老作用,首先以秀丽隐杆线虫作为衰老模型,测定狐臭柴叶水提取液对秀丽隐杆线虫自然寿命、虫体长度、运动能力、紫外应激能力及丙二醛含...为了研究狐臭柴叶水提取液(Premna puberula Pamp.leaves water extract,PPW)对秀丽隐杆线虫的抗衰老作用,首先以秀丽隐杆线虫作为衰老模型,测定狐臭柴叶水提取液对秀丽隐杆线虫自然寿命、虫体长度、运动能力、紫外应激能力及丙二醛含量的影响,再以苯酚-硫酸法、酒石酸铁法、硝酸钠-硝酸铝法及考马斯亮蓝法分别测定PPW中多糖、总黄酮、总酚、蛋白质的含量。实验结果表明,与空白对照相比,在PPW含量为25%、50%、75%时,分别延长了秀丽隐杆线虫自然寿命的13.83%、16.42%、12.27%,在紫外应激条件下分别延长线虫寿命的21.12%、16.81%、32.96%。在PPW含量为50%和75%时,线虫的运动能力、虫体长度显著高于空白组(P<0.05),显著降低了线虫体内丙二醛的含量(P<0.05)。PPW中多糖、总黄酮、总酚、蛋白质含量分别为54.30±3.39、13.52±0.90、15.52±0.53、13.87±0.30 mg/g。结果说明,狐臭柴叶水提取液可以延缓秀丽隐杆线虫的衰老、降低体内丙二醛含量、促进线虫生长发育、提高运动能力和抗紫外应激能力。此结论可为狐臭柴叶进一步的研究与开发利用提供参考,尤其是为探究狐臭柴的食用价值、药用价值和医疗保健功能奠定理论基础。展开更多
基金Supported by National Natural Science Foundation of China(31270225)~~
文摘In order to investigate the protective effect of aloe anthraquinones on growth and development of soybean against ultraviolet B radiation stress from the morphological structure and physio-chemical indices. The results showed that, stressed by the enhanced ultraviolet b radiation, the soybean gave a dwarfed plant, shrunken leaf area and decreased photosynthetic pigment, while an ascended MDA content. Spraying aloe anthraquinones effectively relieved the reductions of chloro- phyll content and biomass and decreased the production of MDA under the radia- tion of UV-B. Moreover, under the UV-B radiation, waxy substances on epidermal cells increased remarkably and the stomas showed obvious subsidence, while spraying aloe anthraquinones could maintain the structure and shape of cells similar to that under natural light, and the stomas subsidence as well.
文摘Exposure of skin to solar ultraviolet（UV） radiation induces photo-damage.Ultraviolet B（UVB） is the major component of UV radiation which induces the production of reactive oxygen species（ROS） and plays an impor-tant role in photo-damage.Hydrogen gas reduces ROS and alleviates inflammation.In this study,we sought to demonstrate that hydrogen-rich saline has the effect on skin injuries caused by UVB radiation.UVB radiation was irradiated on female C57BL/6 rats to induce skin injury.Hydrogen-rich saline and nitrogen-rich saline were ad-ministered to rats by intraperitoneal injection.Skin damage was detected by microscope after injury.UVB radia-tion had a significant affection in tumor necrosis factor alpha,interleukin（IL）-1β and IL-6 levels,tissue superox-ide dismutase,malondialdehyde and nitric oxide activity.Hydrogen-rich saline had a protective effect by altering the levels of these markers and relieved morphological skin injury.Hydrogen-rich saline protected against UVB radiation injury,possibly by reducing inflammation and oxidative stress.
基金supported by Ministry of Agriculture,Food and Rural Affairs,Republic of Korea
文摘Farmers are frequently exposed to ultraviolet（UV） radiation which causes various diseases by inducing oxidative stress.This study aimed to assess the effects of sunblock on oxidative stress in the body.Eighty-seven farmers were divided into two groups：those who wore sunblock for five days and those who did not.The total antioxidant capacity（TAC） in urine,which is an antioxidant indicator,and 8-hydroxy-2-deoxyguanosine（8-OHdG） levels in urine,an oxidative stress indicator,were measured.The urinary TAC of sunblock users was significantly higher than that of non-users,but urinary 8-OHdG levels were not significantly different.Even after adjustment for potential confounders,urinary TAC was found to be markedly increased with sunblock usage.These results suggest that sunblock is effective in preventing oxidative stress among farmers.In addition,they show that urinary TAC can be used as a good effect marker of oxidative stress caused by UV exposure.
