New physics at last?
Article Abstract:
Two experiments conducted at the HERA positron-proton collider in Hamburg, Germany, suggest the emergence of new fundamental physics. The experiments sought to capture and measure particles resulting from the collision between circulating positrons with 27.5 GeV of energy and protons with 820 GeV circulating in the opposite direction. The experiments found unexpected signals that cannot be explained by the standard model of particle analysis. The results indicate a need for a new level of understanding of particle physics.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
A contractile nuclear actin network drives chromosome congression in oocytes
Article Abstract:
Chromosome congression during the first meiotic division in starfish oocytes is examined. It is shown that microtubules are not sufficient for capturing chromosomes and that the delivery of chromosomes to the microtubule spindle helps in preventing chromosome loss and aneuploidy of the egg due to the contraction of the contractile actin network.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
User Contributions:
Comment about this article or add new information about this topic:
Delivering spermatozoan RNA to the oocyte
Article Abstract:
The human male gametes pass over more to the oocyte than just the haploid male genome - paternal messenger RNAs are also delivered to the egg at fertilization. Study results show that the Spermatozoa deliver RNAs to the oocyte at fertilization.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Adhesion articulated. The molecular architecture of cadherins in native epidermal desmosomes. Direct observation of catch bonds involving cell-adhesion molecules
- Abstracts: Nck adaptor proteins link nephrin to the actin cytoskeleton of kidney podocytes. Pilus retraction powers bacterial twitching motility
- Abstracts: Antipredatory behavior in lizards: interactions between group size and predation risk. Behavioral processes affecting development: Tinbergen's fourth question comes of age
- Abstracts: Strategies for containing an emerging influenza pandemic in Southeast Asia. Travelling waves in the occurrence of dengue haemorrhagic fever in Thailand
- Abstracts: Autocatalytic RNA cleavage in the human beta-globin pre-mRNA promotes transcription termination. Defects in RGS9 or its anchor protein R9AP in patients with slow photoreceptor deactivation