Interacting supernovae from photoionization-confined shells around red supergiant stars.

abstract：:There are large amounts of heavy alpha-emitters in nuclear waste and nuclear materials inventories stored in various sites around the world. These include plutonium and minor actinides such as americium and curium. In preparation for geological disposal there is consensus that actinides that have been separated from s...

journal_title：Nature

authors： Farnan I,Cho H,Weber WJ

更新日期：2007-01-11 00:00:00

abstract：:Nine neurodegenerative diseases are caused by expanded polyglutamine (polyQ) tracts in different proteins, such as huntingtin in Huntington's disease and ataxin 3 in spinocerebellar ataxia type 3 (SCA3). Age at onset of disease decreases with increasing polyglutamine length in these proteins and the normal length also...

journal_title：Nature

authors： Ashkenazi A,Bento CF,Ricketts T,Vicinanza M,Siddiqi F,Pavel M,Squitieri F,Hardenberg MC,Imarisio S,Menzies FM,Rubinsztein DC

更新日期：2017-05-04 00:00:00

abstract：:Retrotransposons, which proliferate by reverse transcription of RNA intermediates, comprise a major portion of plant genomes. Plants often change the genome size and organization during evolution by rapid proliferation and deletion of long terminal repeat (LTR) retrotransposons. Precise transposon sequences throughout...

journal_title：Nature

authors： Tsukahara S,Kobayashi A,Kawabe A,Mathieu O,Miura A,Kakutani T

更新日期：2009-09-17 00:00:00

abstract：:Although directed migration is a feature of both individual cells and cell groups, guided migration has been studied most extensively for single cells in simple environments. Collective guidance of cell groups remains poorly understood, despite its relevance for development and metastasis. Neural crest cells and neuro...

journal_title：Nature

authors： Bianco A,Poukkula M,Cliffe A,Mathieu J,Luque CM,Fulga TA,Rørth P

更新日期：2007-07-19 00:00:00

abstract：:In cardiac muscle, where Ca2+ influx across the sarcolemma is essential for contraction, the dihydropyridine (DHP)-sensitive L-type calcium channel represents the major entry pathway of extracellular Ca2+. We have previously elucidated the primary structure of the rabbit skeletal muscle DHP receptor by cloning and seq...

journal_title：Nature

authors： Mikami A,Imoto K,Tanabe T,Niidome T,Mori Y,Takeshima H,Narumiya S,Numa S

更新日期：1989-07-20 00:00:00

abstract：:Features that were once considered exclusive to modern birds, such as feathers and a furcula, are now known to have first appeared in non-avian dinosaurs. However, relatively little is known of the early evolutionary history of the hyperinflated brain that distinguishes birds from other living reptiles and provides th...

journal_title：Nature

authors： Balanoff AM,Bever GS,Rowe TB,Norell MA

更新日期：2013-09-05 00:00:00

abstract：:Atrial extracts contain factors which induce potent natriuresis changes in renal haemodynamics, and relax pre-contracted vascular smooth muscle. Low-molecular-weight peptides which mimic these actions have now been purified by several groups, including ours (see accompanying paper), and higher-molecular-weight protein...

journal_title：Nature

authors： Yamanaka M,Greenberg B,Johnson L,Seilhamer J,Brewer M,Friedemann T,Miller J,Atlas S,Laragh J,Lewicki J

更新日期：1984-06-21 00:00:00

abstract：:Kalka is one of about 14 major layered mafic-ultramafic intrusions forming the Giles Complex in central Australia1. The stratigraphical section of the Kalka Intrusion passes from a basal pyroxenite zone (450 + m) through norite and olivine gabbro zones (3,500 m) to an uppermost anorthosite zone (800 + m)2. Further res...

journal_title：Nature

authors： Gray CM,Goode ADT

更新日期：1981-11-12 00:00:00

abstract：: ...

journal_title：Nature

authors： Witze A

更新日期：2019-01-01 00:00:00

abstract：:Nutrient signalling integrates and coordinates gene expression, metabolism and growth. However, its primary molecular mechanisms remain incompletely understood in plants and animals. Here we report unique Ca2+ signalling triggered by nitrate with live imaging of an ultrasensitive biosensor in Arabidopsis leaves and ro...

journal_title：Nature

authors： Liu KH,Niu Y,Konishi M,Wu Y,Du H,Sun Chung H,Li L,Boudsocq M,McCormack M,Maekawa S,Ishida T,Zhang C,Shokat K,Yanagisawa S,Sheen J

更新日期：2017-05-18 00:00:00

abstract：:Brain-derived neurotrophic factor (BDNF) and other neurotrophins have a vital role in the development of the rat and mouse nervous system by influencing the expression of many specific genes that promote differentiation, cell survival, synapse formation and, later, synaptic plasticity. Although nitric oxide (NO) is kn...

journal_title：Nature

authors： Nott A,Watson PM,Robinson JD,Crepaldi L,Riccio A

更新日期：2008-09-18 00:00:00

abstract：:Wetlands are the largest natural source of atmospheric methane, the second most important greenhouse gas. Methane flux to the atmosphere depends strongly on the climate; however, by far the largest part of the methane formed in wetland ecosystems is recycled and does not reach the atmosphere. The biogeochemical contro...

journal_title：Nature

authors： Raghoebarsing AA,Smolders AJ,Schmid MC,Rijpstra WI,Wolters-Arts M,Derksen J,Jetten MS,Schouten S,Sinninghe Damsté JS,Lamers LP,Roelofs JG,Op den Camp HJ,Strous M

更新日期：2005-08-25 00:00:00

abstract：: ...

journal_title：Nature

authors： Witze A

更新日期：2018-11-01 00:00:00

abstract：:Sex is expensive. A population of females that reproduce asexually should prima facie have twice the growth rate of an otherwise equivalent anisogamous sexual population lacking paternal care, or a population with modes of paternal care that can be co-opted by parthenogenetic females. The two leading theories for the ...

journal_title：Nature

authors： Siller S,Department of Zoology, University of Oxford, UK. steven.siller@zoo.ox.ac.uk.

更新日期：2001-06-07 00:00:00

abstract：:Nerve growth factor (NGF) activity was not detected by bioassay in irides killed immediately after excision but NGF appeared within 24 h in living irides placed in culture or grafted to a host eye. Furthermore, sensory and, although less effective, sympathetic denervation of irides in situ led within 10 days to the ap...

journal_title：Nature

authors： Ebendal T,Olson L,Seiger A,Hedlund KO

更新日期：1980-07-03 00:00:00

abstract：:The Tasmanian devil, a large carnivorous Australian marsupial, is under threat from a widespread fatal disease in which a malignant oral-facial tumour obstructs the animal's ability to feed. Here we show that the chromosomes in these tumours have undergone a complex rearrangement that is identical for every animal stu...

journal_title：Nature

authors： Pearse AM,Swift K

更新日期：2006-02-02 00:00:00

abstract：:The TGFβ pathway has essential roles in embryonic development, organ homeostasis, tissue repair and disease. These diverse effects are mediated through the intracellular effectors SMAD2 and SMAD3 (hereafter SMAD2/3), whose canonical function is to control the activity of target genes by interacting with transcriptiona...

journal_title：Nature

authors： Bertero A,Brown S,Madrigal P,Osnato A,Ortmann D,Yiangou L,Kadiwala J,Hubner NC,de Los Mozos IR,Sadée C,Lenaerts AS,Nakanoh S,Grandy R,Farnell E,Ule J,Stunnenberg HG,Mendjan S,Vallier L

更新日期：2018-03-08 00:00:00

abstract：:c-Abl, a non-receptor tyrosine kinase, is activated by agents that damage DNA. This activation results in either arrest of the cell cycle in phase G1 or apoptotic cell death, both of which are dependent on the kinase activity of c-Abl. p73, a member of the p53 family of tumour-suppressor proteins, can also induce apop...

journal_title：Nature

authors： Agami R,Blandino G,Oren M,Shaul Y

更新日期：1999-06-24 00:00:00

abstract：:In the chick embryo, left-right asymmetric patterns of gene expression in the lateral plate mesoderm are initiated by signals located in and around Hensen's node. Here we show that Caronte (Car), a secreted protein encoded by a member of the Cerberus/Dan gene family, mediates the Sonic hedgehog (Shh)-dependent inducti...

journal_title：Nature

authors： Rodríguez Esteban C,Capdevila J,Economides AN,Pascual J,Ortiz A,Izpisúa Belmonte JC

更新日期：1999-09-16 00:00:00

abstract：:During early mammalian development, as the pluripotent cells that give rise to all of the tissues of the body proliferate and expand in number, they pass through transition states marked by a stepwise restriction in developmental potential and by changes in the expression of key regulatory genes. Recent findings show ...

journal_title：Nature

authors： Pera MF,Tam PP

更新日期：2010-06-10 00:00:00

abstract：:Touch and mechanical pain are first detected at our largest sensory surface, the skin. The cell bodies of sensory neurons that detect such stimuli are located in the dorsal root ganglia, and subtypes of these neurons are specialized to detect specific modalities of mechanical stimuli. Molecules have been identified th...

journal_title：Nature

authors： Wetzel C,Hu J,Riethmacher D,Benckendorff A,Harder L,Eilers A,Moshourab R,Kozlenkov A,Labuz D,Caspani O,Erdmann B,Machelska H,Heppenstall PA,Lewin GR

更新日期：2007-01-11 00:00:00

abstract：:The application of human embryonic stem (ES) cells in medicine and biology has an inherent reliance on understanding the starting cell population. Human ES cells differ from mouse ES cells and the specific embryonic origin of both cell types is unclear. Previous work suggested that mouse ES cells could only be obtaine...

journal_title：Nature

authors： Tesar PJ,Chenoweth JG,Brook FA,Davies TJ,Evans EP,Mack DL,Gardner RL,McKay RD

更新日期：2007-07-12 00:00:00

abstract：:It has been suggested, on the basis of modern hydrology and fully coupled palaeoclimate simulations, that the warm greenhouse conditions that characterized the early Palaeogene period (55-45 Myr ago) probably induced an intensified hydrological cycle with precipitation exceeding evaporation at high latitudes. Little f...

journal_title：Nature

authors： Brinkhuis H,Schouten S,Collinson ME,Sluijs A,Sinninghe Damsté JS,Dickens GR,Huber M,Cronin TM,Onodera J,Takahashi K,Bujak JP,Stein R,van der Burgh J,Eldrett JS,Harding IC,Lotter AF,Sangiorgi F,van Konijnenburg-van Citte

更新日期：2006-06-01 00:00:00

abstract：:High-harmonic generation by focusing a femtosecond laser onto a gas is a well-known method of producing coherent extreme-ultraviolet (EUV) light. This nonlinear conversion process requires high pulse intensities, greater than 10(13) W cm(-2), which are not directly attainable using only the output power of a femtoseco...

journal_title：Nature

authors： Kim S,Jin J,Kim YJ,Park IY,Kim Y,Kim SW

更新日期：2008-06-05 00:00:00

abstract：:As an approach to the study of the kind of chemical process that might have contributed to the origin of life, attempts have been made to develop purely chemical systems in which oligonucleotides self-replicate. Although performed oligonucleotides have been shown to facilitate the formation of their complements from a...

journal_title：Nature

authors： Zielinski WS,Orgel LE

更新日期：1987-05-28 00:00:00

abstract：:The genetic relationships of human populations have been studied by comparing gene frequency data for protein and blood-group loci of different populations. DNA analysis now promises to be more informative since not only do the DNA coding sequences have more variation than their corresponding proteins but, in addition...

journal_title：Nature

authors： Wainscoat JS,Hill AV,Boyce AL,Flint J,Hernandez M,Thein SL,Old JM,Lynch JR,Falusi AG,Weatherall DJ

更新日期：1986-02-06 00:00:00

abstract：:The well known trade-off between hardness and toughness (resistance to fracture) makes simultaneous improvement of both properties challenging, especially in diamond. The hardness of diamond can be increased through nanostructuring strategies1,2, among which the formation of high-density nanoscale twins - crystalline ...

journal_title：Nature

authors： Yue Y,Gao Y,Hu W,Xu B,Wang J,Zhang X,Zhang Q,Wang Y,Ge B,Yang Z,Li Z,Ying P,Liu X,Yu D,Wei B,Wang Z,Zhou XF,Guo L,Tian Y

更新日期：2020-06-01 00:00:00

abstract：:High-pressure transitions are thought to modify hydrogen molecules to a molecular metallic solid and finally to an atomic metal1, which is predicted to have exotic physical properties and the topology of a two-component (electron and proton) superconducting superfluid condensate2,3. Therefore, understanding such trans...

journal_title：Nature

authors： Ji C,Li B,Liu W,Smith JS,Majumdar A,Luo W,Ahuja R,Shu J,Wang J,Sinogeikin S,Meng Y,Prakapenka VB,Greenberg E,Xu R,Huang X,Yang W,Shen G,Mao WL,Mao HK

更新日期：2019-09-01 00:00:00

abstract：:Recent studies have shown that developing nerve fibres grow directly to their targets and are guided by specific cues, but the nature of these cues and the mechanism of guidance remain unknown. The growth of sympathetic axons towards an artificial source of nerve growth factor (NGF) in vivo and of sensory neurites up ...

journal_title：Nature

authors： Lumsden AG,Davies AM

更新日期：1983-12-22 00:00:00

abstract：:Therizinosauroids are an enigmatic group of dinosaurs known mostly from the Cretaceous period of Asia, whose derived members are characterized by elongate necks, laterally expanded pelves, small, leaf-shaped teeth, edentulous rostra and mandibular symphyses that probably bore keratinized beaks. Although more than a do...

journal_title：Nature

authors： Kirkland JI,Zanno LE,Sampson SD,Clark JM,DeBlieux DD

更新日期：2005-05-05 00:00:00