Genomic medicine and the future of health care

Genomic technologies and computational advances are leading to an information revolution in biology and medicine. Simulations of molecular processes in cells and predictions of drug effects in humans will advance pharmaceutical research and speed up clinical trials. Computational prognostics and diagnostics that combine with genotyping and molecular profiling may soon cause fundamental changes in the practice of health care.     

Apes save tools for future use

Planning for future needs, not just current ones, is one of the most formidable human cognitive achievements. Whether this skill is a uniquely human adaptation is a controversial issue. In a study we conducted, bonobos and orangutans selected, transported, and saved appropriate tools above baseline levels to use them 1 hour later (experiment 1). Experiment 2 extended these results to a 14-hour delay between collecting and using the tools. Experiment 3 showed that seeing the apparatus during tool selection was not necessary to succeed. These findings suggest that the precursor skills for planning for the future evolved in great apes before 14 million years ago, when all extant great ape species shared a common ancestor.     

国外合作社发展经验及对我国农民专业合作社的借鉴

《农民专业合作社法》的颁布实施,标志着我国农民专业合作组织将进入依法发展的新阶段,但从法律的颁布实施到落实到位还有一段时间差。因此,研究国外合作社的发展经验,将帮助我们以一个较前瞻的视野,探讨中国农民专业合作社的长远发展对策。     

DNA Complementary to Ribosomal RNA: Relation between Genomic Proportion and Ploidy

Ten Nicotiana species were assayed for the proportion of DNA that is complementary to ribosomal RNA. This proportion varies from 0.27 to 0.9 percent, with tetraploid species having lower values than the diploid species. The tetraploid species have about twice as much DNA per cell as do diploid species. Thus, the absolute number of genes for ribosomal RNA varies less than the proportion of complementary DNA. Further, the number of genes for the RNA in 80S ribosomes varies less among species than does that for the RNA in 70S ribosomes. The data indicate that loss of DNA complementary to ribosomal RNA is associated with tetraploidy in the genus Nicotiana.     

中国农业考古资料索引

第二编农业工具(续2002年1期)前言一,本索引按内容分为农作物、农业工具、农田水利、农作图、家禽(附蚕桑、渔业)等五编,每编再分为若干类。本编“农业工具”已在《农业考古》1981年2期至1983年2期、1994年1期至1996年1期、2000年3期至2002年3期发表。本期发表的主要是2000年至2004年的资料。二,本索引主要收集已在《文物》、《考古》、《考古学报》三大杂志上公开发表的有关古代农业的考古资料,酌量介绍一些地方杂志发表的材料及各博物馆的收藏品。三,索引中的“时代”,均按原发表报告注明,有明显出入者酌加更改。索引中的“名称”均按原发…