What will the Sun look like when it dies? What is the final state of the Sun? The Sun is an energy-generating star. When the Sun-like star dies, there will be herald that it form planerary nebulae. The process of the star going to die is like this. Firstly, when stars up to eight times the mass of themselves, they will die. Then they bloat into red giants, and shed as much as half their mass as gas and dust mubulae. 阅读全文 »
Mar 23, DOE Secretary of Energy Steven Chu laid out a plan for spend $1.2 billion of the $1.6 billion that the $787 billion stimulus bill provides DOE’s Office of Science. Most of that money will pay for upgraded buildings and equipment at the national laboratories. 阅读全文 »
Land degradation – the decline in the quality of soil, water and vegetation – is of profound importance but until now there have been no consistent global data by which to assess its extent and severity. A new study published in the journal Soil Use and Management attempts to measure the extent and severity of land degradation across the globe for the first time. They concludes that 24% of the land area is degrading, and often in very productive areas. 阅读全文 »
A new muscadine grape cultivar called ‘Delicious’ have been introduced, ‘Delicious’ ripens early, produces high yields, and is disease-resistant. The black fruit features exceptional taste and texture with an edible skin, making it well-suited for fresh fruit consumption and the potential for wine production. The name ‘Delicious’ was selected based on the comments of vineyard visitors who sampled the fruit. 阅读全文 »
Be regarded as beginning in 2009 Chinese small screen, the latest popular drama called “My Chief and My Regiment”. This drama adopted from a same titled novel offers a great chance for the Chinese to learn more about the wars that broke out during China’s Resistance Against Japan. 阅读全文 »
Tobacco isn’t famous for its health benefits. But now scientists have succeeded in using genetically modified tobacco plants to produce medicines for several autoimmune and inflammatory diseases, including diabetes. The research is published in the open access journal BMC Biotechnology. 阅读全文 »
The Biotechnology and Biological Sciences Research Council (BBSRC) is the UK funding agency for research in the life sciences. Sponsored by Government, BBSRC annually invests around £420 million in a wide range of research that makes a significant contribution to the quality of life for UK citizens and supports a number of important industrial stakeholders including the agriculture, food, chemical, healthcare and pharmaceutical sectors. BBSRC carries out its mission by funding internationally competitive research, providing training in the biosciences, fostering opportunities for knowledge transfer and innovation and promoting interaction with the public and other stakeholders on issues of scientific interest in universities, centres and institutes. 阅读全文 »
Flowering plants have evolved a complex fertilization mechanism involving two male and two female gametes. Double fertilization produces the embryo and the endosperm, which protects the embryo and regulates trophic interactions between the embryo and the mother. Since the discovery of double fertilization at the end of the ninetieth century by Guignard and Nawaschin, this unique reproductive process has remained rather enigmatic. Direct cytological observations are difficult as the dynamic interactions between relatively small gametes takes place deep in the surrounding maternal tissues. 阅读全文 »
Last post I reported Gene that switches on ‘essence of male’ was discovered. Now i will tell you the background of find it. Firstly abstract background. The unique double fertilization mechanism in flowering plants depends upon a pair of functional sperm cells. During male gametogenesis, each haploid microspore undergoes an asymmetric division to produce a large, non-germline vegetative cell and a single germ cell that divides once to produce the sperm cell pair. Despite the importance of sperm cells in plant reproduction, relatively little is known about the molecular mechanisms controlling germ cell proliferation and specification. 阅读全文 »
Plant biologists have published results of a new study into plant sex in the journal Public Library of Science Genetics (PLoS Genetics), and they discovered that a particular gene switches on ‘the essence of male’. The study identifies role of gene responsible for plant sperm production. 阅读全文 »
