Wood is a secondary xylem generated by vascular cambium. Vascular cambium activities mainly include cambium proliferation and vascular tissue formation through secondary growth, thereby producing new secondary phloem inward and secondary xylem outward an
One of the biggest challenges in tissue engineering and regenerative medicine is to ensure oxygen supply of cells in the (temporary) absence of vasculature. With the vision to exploit photosynthetic oxygen production by microalgae, co-cultivated in close
Previous studies have shown that vocalizations of dogs can provide information to human companions. While acoustic signals of dogs have been intensively studied during the last decade, barking during hunting activities remains unstudied. The experiences
German biologist who kept alive English naturalist Charles Darwin's theory of natural selection as the mechanism for evolution, when most biologists were looking for other mechanisms. Weismann also predicted the existence of deoxyribonucleic acid (DNA), arguing that parents pass traits, such as eye ...
- 《Arteriosclerosis Thrombosis & Vascular Biology》 被引量: 303发表: 2001年 Retinoids in cancer therapy and chemoprevention: promise meets resistance Retinoids (natural and synthetic derivatives of vitamin A) signal potent differentiation and growth-suppressive effects in diverse normal, premalignant, an...
Under the selection imposed by antifungal drugs, drug-sensitive fungal pathogens ... JB Anderson - 《Nature Reviews Microbiology》 被引量: 630发表: 2005年 Production and function of cytokines in natural and acquired immunity to Candida albicans infection. Host resistance against infections caused by ...
Thus, natural selection has maintained similar structures to carry out similar functions even as the gene sequences have diverged to such a great extent between the different species. The helix-turn-helix motif is common to many gene repressor proteins that bind to DNA sequences. Rigorous ...
Genetic diversity is an essential aspect in conservation biology because a fundamental concept of natural selection states that the rate of evolutionary change in a population is proportional to the amount of genetic diversity present in it. Decreasing genetic diversity increases the extinction risk of ...
Gut microbes shape many aspects of organismal biology, yet how these key bacteria transmit among hosts in natural populations remains poorly understood. Recent work in mammals has emphasized either transmission through social contacts or indirect transmi
“dehesas” together with the availability of food resources were the main factors triggering the selection of these common foraging grounds. Our findings may constitute a key piece that connect the conservation of the “dehesa”,a high value farming system that requires high priority in ...