A strong focus of ecological research for several decades has been to understand the factors underlying the variation in animal life-histories. In recent times, ecological studies have begun to show that oxidative str...A strong focus of ecological research for several decades has been to understand the factors underlying the variation in animal life-histories. In recent times, ecological studies have begun to show that oxidative stress may represent another important modulator of competitive trade-offs among fitness traits or of positively integrated patterns of traits. Therefore, incorporating mechanisms underlying oxidative physiology into evolutionary ecology has the potential to help understand variation in life-history strategies. In this review, I provide a general overview of oxidative stress physiology, and subsequently focus on topics that have been neglected in previous ecological reviews on oxidative stress. Specifically, I introduce and discuss the adaptations that animals have evolved to cope with oxidative stress; the environmental stressors that can generate changes in oxidative balance; the role of reactive species in transduction of environmental stimuli and cell signaling; and the range of hormetic responses to oxidative stress [Current Zoology 56 （6）： 687-702, 2010].展开更多
Xi Congratulates Scientists on Expedition to the Qinghai-Tibet Plateau Chinese President Xi Jinping sent a congratulatory letter to a research team on the second scientific expedition to the Qinghai-Tibet Plateau on A...Xi Congratulates Scientists on Expedition to the Qinghai-Tibet Plateau Chinese President Xi Jinping sent a congratulatory letter to a research team on the second scientific expedition to the Qinghai-Tibet Plateau on Aug.19.Xi expressed his congratulations and greetings to scientists,young students and support staff who joined the country’s second comprehensive scientific expedition to the plateau.He noted that the expedition will promote the plateau’s sustainable development and the world’s ecological environmental protection.展开更多
OBJECTIVE:To probe the effects of acupuncture reinforcing and reducing methods on the human body.METHODS:Studied acupuncture reinforcing and reducing actions in the ancient literature,based on modern clinical and expe...OBJECTIVE:To probe the effects of acupuncture reinforcing and reducing methods on the human body.METHODS:Studied acupuncture reinforcing and reducing actions in the ancient literature,based on modern clinical and experimental studies,in combination with experience of acupuncture teaching and clinical treatment.RESULTS:The key to the generation of reinforcing and reducing actions is not the acupuncture reinforcing and reducing methods themselves,but instead the functional state of the patient during the acupuncture.When reinforcing and reducing methods act on the human body,a reinforcing-reducing effect is produced through regulation of Qi,indicating that the production of the reinforcing-reducing effect requires a certain condition.Specifically,acupuncture does not produce the reinforcing-reducing effect under all conditions,but can produce a reinforcing effect in patients with deficiency syndrome and a reducing effect in patients with excess syndrome.CONCLUSION:Reinforcing and reducing methods each have therapeutic effects on both deficiency syndrome and excess syndrome,but a reinforcing method should be selected first for deficiency syndrome and a reducing method should be selected first for excess syndrome.展开更多
基金supported by a postdoctoral NERC research fellowship (NE/G013888/1)
文摘A strong focus of ecological research for several decades has been to understand the factors underlying the variation in animal life-histories. In recent times, ecological studies have begun to show that oxidative stress may represent another important modulator of competitive trade-offs among fitness traits or of positively integrated patterns of traits. Therefore, incorporating mechanisms underlying oxidative physiology into evolutionary ecology has the potential to help understand variation in life-history strategies. In this review, I provide a general overview of oxidative stress physiology, and subsequently focus on topics that have been neglected in previous ecological reviews on oxidative stress. Specifically, I introduce and discuss the adaptations that animals have evolved to cope with oxidative stress; the environmental stressors that can generate changes in oxidative balance; the role of reactive species in transduction of environmental stimuli and cell signaling; and the range of hormetic responses to oxidative stress [Current Zoology 56 （6）： 687-702, 2010].
文摘Xi Congratulates Scientists on Expedition to the Qinghai-Tibet Plateau Chinese President Xi Jinping sent a congratulatory letter to a research team on the second scientific expedition to the Qinghai-Tibet Plateau on Aug.19.Xi expressed his congratulations and greetings to scientists,young students and support staff who joined the country’s second comprehensive scientific expedition to the plateau.He noted that the expedition will promote the plateau’s sustainable development and the world’s ecological environmental protection.
文摘OBJECTIVE:To probe the effects of acupuncture reinforcing and reducing methods on the human body.METHODS:Studied acupuncture reinforcing and reducing actions in the ancient literature,based on modern clinical and experimental studies,in combination with experience of acupuncture teaching and clinical treatment.RESULTS:The key to the generation of reinforcing and reducing actions is not the acupuncture reinforcing and reducing methods themselves,but instead the functional state of the patient during the acupuncture.When reinforcing and reducing methods act on the human body,a reinforcing-reducing effect is produced through regulation of Qi,indicating that the production of the reinforcing-reducing effect requires a certain condition.Specifically,acupuncture does not produce the reinforcing-reducing effect under all conditions,but can produce a reinforcing effect in patients with deficiency syndrome and a reducing effect in patients with excess syndrome.CONCLUSION:Reinforcing and reducing methods each have therapeutic effects on both deficiency syndrome and excess syndrome,but a reinforcing method should be selected first for deficiency syndrome and a reducing method should be selected first for excess syndrome.
