4,193 Result(s)

Article

The **gaze ophiolite (Tibet): a peculiar oceanic lithosphere

The **gaze ophiolite which outcrops along the Yarlung Zangbo river, southern Tibet, locally displays a complete ophiolitic sequence from marine sedimentary cover over basaltic volcanics to the north, to fresh ...

A. Nicolas, J. Girardeau, J. Marcoux, B. Dupre, Wang **bin, Cao Yougong… in Nature (1981)

Article

Abundance variation of iridium and trace elements at the Permian/Triassic boundary at Shangsi in China

Despite recent searches for anomalous iridium(Ir) concentrations at the Permian/Triassic boundary (P/Tr) of marine sediments^1–3, no Ir above a level of 0.5 p.p.b. (parts per 10⁹) has been found. Detailed event–st...

Xu Dao-Yi, Ma Shu-Lan, Chai Zhi-Fang, Mao Xuo-Ying, Sun Yi-Ying, Zhang Qin-Wen… in Nature (1985)

Article

Efficient photovoltaic devices for InP semiconductor/liqud junctions

AN alternative to conventional solid-state photovoltaic devices is the semiconductor/liquid junction. Liquid-junction cells not only offer the possibility of integrating energy conversion and storage functions¹, ...

Michael J. Heben, Amit Kumar, Chong Zheng, Nathan S. Lewis in Nature (1989)

Article

Evolution of the MHC class I genes of a New World primate from ancestral homologues of human non-classical genes

THE products of the classical human major histocompatibility complex (MHC) class I genes (HLA-A, -B, -C) are highly polymorphic molecules that bind peptides and present them to T lymphocytes^1–4. The non-polymorph...

David I. Watkins, Zheng W. Chen, Austin L. Hughes, Mark G. Evans… in Nature (1990)

Article

Binding of chaperonins

HELEN SAIBIL, ZHENG DONG, STEVE WOOD, ARLENE AUF DER MAUER in Nature (1991)

Article

T-complex polypeptide-1 is a subunit of a heteromeric particle in the eukaryotic cytosol

THE murine t-complex encodes t-complex polypeptide-1 (TCP1)¹, which is constitutively expressed in almost all cells, and upregulated during spermatogenesis^2,3. Mammalian sequences have >96% identity with each oth...

Victoria A. Lewis, Gillian M. Hynes, Dong Zheng, Helen Saibil, Keith Willison in Nature (1992)

Article

A plate-tectonic speed limit?

Joseph G. Meert, Rob Van der Voo, Chris McA. Powell, Zheng-**ang Li… in Nature (1993)

Article

Protective effects of oligosaccharides in P-selectin-dependent lung injury

NEUTROPHIL recruitment into tissues is a multistep process involving sequential engagement of adhesion molecules, including selectins (E,P,L), which are reactive with oligosaccharides, and the family of (β2 in...

Michael S. Mulligan, James C. Paulson, Shawn De Freest, Zhong-Li Zheng… in Nature (1993)

Article

Apoptotic signals delivered through the T-cell receptor of a T-cell hybrid require the immediate–early gene nur77

ENGAGEMENT of the T-cell antigen receptor (TCR) on immature thymic T cells induces death by apoptosis^1–3. Although several lines of evidence indicate that apoptosis requires de novo gene expression, little is kno...

Zheng-Gang Liu, Sallie W. Smith, Kelly A. McLaughlin, Lawrence M. Schwartz… in Nature (1994)

Article

Turning of nerve growth cones induced by neurotransmitters

PATHFINDING by growing nerve processes in the develo** nervous system depends on the turning response of the growing tip, the growth cone, to extracellular guidance cues^1–4. There is evidence in vivo and in cel...

James Q. Zheng, Mark Felder, John A. Connor, Mu-ming Poo in Nature (1994)

Article

Therapeutic potentiation of the immune system by costimulatory Schiff-base-forming drugs

IMMUNE responses are orchestrated by CD4 T lymphocytes, which receive a cognitive signal when clonally distributed receptors are occupied by major histocompatibility complex (MHC) class II-bound peptides on a...

J. Rhodes, H. Chen, S. R. Hall, J. E. Beesley, D. C. Jenkins, P. Collins… in Nature (1995)

Article

Nucleation of microtubule assembly by a γ-tubulin-containing ring complex

The highly conserved protein γ-tubulin is required for microtubule nucleation in vivo. When viewed in the electron microscope, a highly purified γtubulin complex from Xenopus consisting of at least seven diffe...

Yixian Zheng, Mei Lie Wong, Bruce Alberts, Tim Mitchison in Nature (1995)

Article

Three distinct signalling responses by murine fibroblasts to genotoxic stress

GENOTOXIC stress triggers signalling pathways that mediate either the protection or killing of affected cells. Whereas induction of p53 involves events in the cell nucleus¹, the activation of transcription factor...

Zheng-Gang Liu, Rajasekaran Baskaran, Elaine T. Lea-Chou, Lauren D. Wood… in Nature (1996)

Article

Decreased apoptosis in the brain and premature lethality in CPP32-deficient mice

PROGRAMMED cell death (apoptosis) is a prominent feature of the development of the immune and nervous systems^1,2. The identification of the Caenorhabditis elegans cell death gene, ced-3, as a prototype of the int...

Keisuke Kuida, Timothy S. Zheng, Songqing Na, Chia-Yi Kuan, Di Yang… in Nature (1996)

Article

Polymer gels with engineered environmentally responsive surface patterns

The polymer gels called hydrogels may be induced to swell or shrink (taking up or expelling water between the crosslinked polymer chains) in response to a variety of environmental stimuli, such as changes in p...

Zhibing Hu, Yuanye Chen, Changjie Wang, Yindong Zheng, Yong Li in Nature (1998)

Article

Ultradry seed storage cuts cost of gene bank

Today we are faced with an urgent challenge to organize the efficient conservation of biodiversity. In the case of plants, one way of doing this is to store their seeds in a gene bank. The effective preservati...

Guang-Hua Zheng, **n-Ming **g, Kar-Ling Tao in Nature (1998)

Article

Turning of nerve growth cones induced by localized increases in intracellular calcium ions

Guidance of develo** axons involves turning of the motile tip, the growth cone, in response to a variety of extracellular cues^1,2. Little is known about the intracellular mechanism by which the directional sign...

James Q. Zheng in Nature (2000)

Article

Phase transitions in the incoherent lattice fluctuations in YBa ₂Cu₃O_7-δ

The growing body of experimental evidence^{1,2,3,4,5,6,7} for the existence of complex textures of charges and spins in the high-temperature superconductors has drawn attention to the so-called ‘stripe-phase’ model⁸

R. P. Sharma, S. B. Ogale, Z. H. Zhang, J. R. Liu, W. K. Chu, Boyed Veal… in Nature (2000)

Article

Functional link of BRCA1 and ataxia telangiectasia gene product in DNA damage response

BRCA1 encodes a familial breast cancer suppressor that has a critical role in cellular responses to DNA damage^1,2. Mouse cells deficient for Brca1 show genetic instability, defective G2–M checkpoint control and r...

Shang Li, Nicholas S. Y. Ting, Lei Zheng, Phang-Lang Chen, Yael Ziv, Yosef Shiloh… in Nature (2000)