The role of allergy in the development of asthma.

abstract：:Light usually propagates inside transparent materials in well known ways. However, recent research has examined the possibility of modifying the way the light travels by taking a normal transparent dielectric and inserting tiny metallic inclusions of various shapes and arrangements. As light passes through these struc...

journal_title：Nature

authors： Tsakmakidis KL,Boardman AD,Hess O

更新日期：2007-11-15 00:00:00

abstract：:In this Letter, in "About 75% of this reduction is expected to come from emission reductions and the remaining 25% from land use, land-use change and forestry", '25%' should read '1%' and '75%' should read '99%'. In the sentence "The carbon-sink-maximizing portfolio has a small negative effect on annual precipitation ...

journal_title：Nature

authors： Luyssaert S,Marie G,Valade A,Chen YY,Djomo SN,Ryder J,Otto J,Naudts K,Lansø AS,Ghattas J,McGrath MJ

更新日期：2019-03-01 00:00:00

abstract：:Cellular ras genes encode a family of membrane-associated proteins (p21ras) that bind guanine nucleotide and possess a low intrinsic GTPase activity. The p21ras proteins are ubiquitously expressed in mammalian cells and are thought to be involved in a growth-promoting signal transduction pathway; their mode of action,...

journal_title：Nature

authors： Graziadei L,Riabowol K,Bar-Sagi D

更新日期：1990-09-27 00:00:00

abstract：:The search to understand the mechanisms regulating brain wiring has relied on biochemical purification approaches in vertebrates and genetic approaches in invertebrates to identify molecular cues and receptors for axon guidance. Here we describe a phenotype-based gene-trap screen in mice designed for the large-scale i...

journal_title：Nature

authors： Leighton PA,Mitchell KJ,Goodrich LV,Lu X,Pinson K,Scherz P,Skarnes WC,Tessier-Lavigne M

更新日期：2001-03-08 00:00:00

abstract：:Ribosome-driven protein biosynthesis is comprised of four phases: initiation, elongation, termination and recycling. In bacteria, ribosome recycling requires ribosome recycling factor and elongation factor G, and several structures of bacterial recycling complexes have been determined. In the eukaryotic and archaeal k...

journal_title：Nature

authors： Becker T,Franckenberg S,Wickles S,Shoemaker CJ,Anger AM,Armache JP,Sieber H,Ungewickell C,Berninghausen O,Daberkow I,Karcher A,Thomm M,Hopfner KP,Green R,Beckmann R

更新日期：2012-02-22 00:00:00

abstract：:An ageing world population has fuelled interest in regenerative remedies that may stem declining organ function and maintain fitness. Unanswered is whether elimination of intrinsic instigators driving age-associated degeneration can reverse, as opposed to simply arrest, various afflictions of the aged. Such instigator...

journal_title：Nature

authors： Jaskelioff M,Muller FL,Paik JH,Thomas E,Jiang S,Adams AC,Sahin E,Kost-Alimova M,Protopopov A,Cadiñanos J,Horner JW,Maratos-Flier E,Depinho RA

更新日期：2011-01-06 00:00:00

abstract：:Oral administration of antigen is used to induce antigen-specific peripheral immune tolerance. As well as preventing systemic immune responses to ingested proteins, oral tolerance to autoantigens has also been used to suppress autoimmune diseases in animals and humans. Both active suppression and clonal anergy are sug...

journal_title：Nature

authors： Chen Y,Inobe J,Marks R,Gonnella P,Kuchroo VK,Weiner HL

更新日期：1995-07-13 00:00:00

abstract：:The enzyme complex nitrogenase, which reduces N2 to NH+4, involves two redox proteins, both irreversibly damaged by O2 (ref. 1). Enzyme activity therefore requires anaerobic conditions, a source of reductant and a large amount of ATP (approximately 16 ATPs per N2). In both aerobic and facultative anaerobic N2-fixing b...

journal_title：Nature

authors： Hill S,Kennedy C,Kavanagh E,Goldberg RB,Hanau R

更新日期：1981-04-02 00:00:00

abstract：:Information--be it classical or quantum--is measured by the amount of communication needed to convey it. In the classical case, if the receiver has some prior information about the messages being conveyed, less communication is needed. Here we explore the concept of prior quantum information: given an unknown quantum ...

journal_title：Nature

authors： Horodecki M,Oppenheim J,Winter A

更新日期：2005-08-04 00:00:00

abstract：:Metabolic phenotypes are the products of interactions among a variety of factors-dietary, other lifestyle/environmental, gut microbial and genetic. We use a large-scale exploratory analytical approach to investigate metabolic phenotype variation across and within four human populations, based on 1H NMR spectroscopy. M...

journal_title：Nature

authors： Holmes E,Loo RL,Stamler J,Bictash M,Yap IK,Chan Q,Ebbels T,De Iorio M,Brown IJ,Veselkov KA,Daviglus ML,Kesteloot H,Ueshima H,Zhao L,Nicholson JK,Elliott P

更新日期：2008-05-15 00:00:00

abstract：:Visible-light absorption and transport of the resultant electronic excitations to a reaction centre through Förster resonance energy transfer1-3 (FRET) are critical to the operation of biological light-harvesting systems4, and are used in various artificial systems made of synthetic dyes5, polymers6 or nanodots7,8. Th...

journal_title：Nature

authors： Lau JA,Chen L,Choudhury A,Schwarzer D,Verma VB,Wodtke AM

更新日期：2021-01-01 00:00:00

abstract：:Acetylcholine (ACh) released on vagal stimulation reduces the heart rate by increasing K+ conductance of pacemaker cells in the sinoatrial (S-A) node. Fluctuation analysis of ACh-activated currents in pacemaker tissue showed this to be due to opening of a separate class of K+ channels gated by muscarinic ACh receptors...

journal_title：Nature

authors： Sakmann B,Noma A,Trautwein W

更新日期：1983-05-19 00:00:00

abstract：:In this Letter, errors in Supplementary Table 1 have been corrected. ...

journal_title：Nature

authors： Song XP,Hansen MC,Stehman SV,Potapov PV,Tyukavina A,Vermote EF,Townshend JR

更新日期：2018-11-01 00:00:00

abstract：:The human B cell-specific alloantigen which is closely linked genetically to HLA contains two non-covalently associated, sialogycoprotein subunits of molecular weight (MW) 29,000 (p29), and 34,000 (p34). Although p29 and p34 have different amino-terminal sequences, their tyrosine peptide maps indicate considerable sim...

journal_title：Nature

authors： Springer TA,Kaufman JF,Terhorst C,Strominger JL

更新日期：1977-07-21 00:00:00

abstract：:The crown-of-thorns starfish (COTS, the Acanthaster planci species group) is a highly fecund predator of reef-building corals throughout the Indo-Pacific region. COTS population outbreaks cause substantial loss of coral cover, diminishing the integrity and resilience of reef ecosystems. Here we sequenced genomes of CO...

journal_title：Nature

authors： Hall MR,Kocot KM,Baughman KW,Fernandez-Valverde SL,Gauthier MEA,Hatleberg WL,Krishnan A,McDougall C,Motti CA,Shoguchi E,Wang T,Xiang X,Zhao M,Bose U,Shinzato C,Hisata K,Fujie M,Kanda M,Cummins SF,Satoh N,Degnan SM

更新日期：2017-04-05 00:00:00

abstract：:Fireflies communicate with each other by emitting yellow-green to yellow-orange brilliant light. The bioluminescence reaction, which uses luciferin, Mg-ATP and molecular oxygen to yield an electronically excited oxyluciferin species, is carried out by the enzyme luciferase. Visible light is emitted during relaxation o...

journal_title：Nature

authors： Nakatsu T,Ichiyama S,Hiratake J,Saldanha A,Kobashi N,Sakata K,Kato H

更新日期：2006-03-16 00:00:00

abstract：:In sexually reproducing animals, a crucial step in zygote formation is the decondensation of the fertilizing sperm nucleus into a DNA replication-competent male pronucleus. Genome-wide nucleosome assembly on paternal DNA implies the replacement of sperm chromosomal proteins, such as protamines, by maternally provided ...

journal_title：Nature

authors： Loppin B,Bonnefoy E,Anselme C,Laurençon A,Karr TL,Couble P

更新日期：2005-10-27 00:00:00

abstract：:Interstellar dust plays a crucial role in the evolution of the Universe by assisting the formation of molecules, by triggering the formation of the first low-mass stars, and by absorbing stellar ultraviolet-optical light and subsequently re-emitting it at infrared/millimetre wavelengths. Dust is thought to be produced...

journal_title：Nature

authors： Maiolino R,Schneider R,Oliva E,Bianchi S,Ferrara A,Mannucci F,Pedani M,Sogorb MR

更新日期：2004-09-30 00:00:00

abstract：:A wide variety of voltage-gated K+ channels are involved in the regulation of neuronal excitability and synaptic transmission. Their heterogeneity arises in part from the large number of genes encoding different K+ channel subunits (reviewed in ref. 1). In addition, heterologous expression studies indicate that assemb...

journal_title：Nature

authors： Sheng M,Liao YJ,Jan YN,Jan LY

更新日期：1993-09-02 00:00:00

abstract：:Gram-negative bacteria possess a complex cell envelope that consists of a plasma membrane, a peptidoglycan cell wall and an outer membrane. The envelope is a selective chemical barrier1 that defines cell shape2 and allows the cell to sustain large mechanical loads such as turgor pressure3. It is widely believed that t...

journal_title：Nature

authors： Rojas ER,Billings G,Odermatt PD,Auer GK,Zhu L,Miguel A,Chang F,Weibel DB,Theriot JA,Huang KC

更新日期：2018-07-01 00:00:00

abstract：:Clonal deletion in the thymus plays a major part in T-cell tolerance to self antigens. But the mechanism of negative selection, its fine specificity and the threshold of affinity and avidity remains unknown. We have now examined these aspects of negative selection with mice expressing a transgenic T-cell receptor with...

journal_title：Nature

authors： Pircher H,Rohrer UH,Moskophidis D,Zinkernagel RM,Hengartner H

更新日期：1991-06-06 00:00:00

abstract：:A plasmalemmal Na(+)-Ca2+ exchange mechanism is an important electrogenic determinant of contractility in cardiac cells. As in other cell types, calcium influx by Na(+)-Ca2+ exchange is secondarily activated by cytoplasmic calcium and probably ATP, but these modulatory mechanisms are either absent or altered in isolat...

journal_title：Nature

authors： Hilgemann DW

更新日期：1990-03-15 00:00:00

abstract：:An amino acid sequence analysis of the N-terminal immunoglobulin heavy and light chain variable regions (VH and VL) from 16 hybridoma proteins which bind phosphorylcholine as well as the complete sequence analysis of 9 of these VH regions is presented. There seem to be more VH regions participating in the phosphorylch...

journal_title：Nature

authors： Gearhart PJ,Johnson ND,Douglas R,Hood L

更新日期：1981-05-07 00:00:00

abstract：:The interaction of lectins with carbohydrate receptors on the plasma membrane of eukaryotic cells results in a wide variety of biological effects. One effect which has been extensively studied is the stimulation of lymphocytes to blastogenesis and proliferation. High doses of concanavalin A (Con A) and phytohaemagglut...

journal_title：Nature

authors： Hilgert I,Horejsí V,Angelisová P,Kristofová H

更新日期：1980-03-20 00:00:00

abstract：:Most mitochondrial proteins are synthesized on cytoplasmic ribosomes and imported into mitochondria. The imported proteins are directed to one of four submitochondrial compartments--the outer mitochondrial membrane, the inner mitochondrial membrane, the intramembraneous space, or the matrix--where the protein then fun...

journal_title：Nature

authors： Bose HS,Lingappa VR,Miller WL

更新日期：2002-05-02 00:00:00

abstract：:Interactions of CD4 with the class II major histocompatibility complex (MHC) are crucial during thymic ontogeny and subsequently for helper and cytotoxic functions of CD4+CD8- T lymphocytes. CD4 is the receptor for the T-lymphotropic human immunodeficiency virus and binds its envelope glycoprotein, gp120. The residues...

journal_title：Nature

authors： Clayton LK,Sieh M,Pious DA,Reinherz EL

更新日期：1989-06-15 00:00:00

abstract：:Generalization is a cognitive ability that allows similar stimuli along a given dimension to be treated as equivalents. Insects exhibit high levels of visual generalization. Honeybees trained to recognize complex visual stimuli on the basis of a single feature generalize their choice to novel stimuli sharing that comm...

journal_title：Nature

authors： Stach S,Benard J,Giurfa M

更新日期：2004-06-17 00:00:00

abstract：:Recent studies have suggested that bone marrow cells possess a broad differentiation potential, being able to form new liver cells, cardiomyocytes and neurons. Several groups have attributed this apparent plasticity to 'transdifferentiation'. Others, however, have suggested that cell fusion could explain these results...

journal_title：Nature

authors： Alvarez-Dolado M,Pardal R,Garcia-Verdugo JM,Fike JR,Lee HO,Pfeffer K,Lois C,Morrison SJ,Alvarez-Buylla A

更新日期：2003-10-30 00:00:00

abstract：:The abundant nuclear enzyme poly(ADP-ribose) polymerase catalyses the synthesis of poly(ADP-ribose) from nicotinamide adenine dinucleotide (NAD+). This protein has an N-terminal DNA-binding domain containing two zinc-fingers, which is linked to the C-terminal NAD(+)-binding domain by a short region containing several ...

journal_title：Nature

authors： Satoh MS,Lindahl T

更新日期：1992-03-26 00:00:00

abstract：:Somatic sexual differentiation in Drosophila melanogaster is accomplished by a hierarchy of genes of which one, Sex-lethal (Sxl), is required for the functional female-specific splicing of the transcripts of the immediately downstream regulatory gene, transformer (tra). The first exon of the tra primary transcript is ...

journal_title：Nature

authors： Inoue K,Hoshijima K,Sakamoto H,Shimura Y

更新日期：1990-03-29 00:00:00