Urchin

Sea Urchin Genome Similar To Man And May Cure Diseases

A research finds that the sea urchin's genome is remarkably similar to that of humans' and may hold the key to preventing and curing several human diseases. //University of Central Florida professor Cristina Calestani and several colleagues have conducted the study and published the results in the ...

LabBits: A media tip sheet from the MBL in Woods Hole

... and David Burgess, professor of biology at Boston College, are placing sea urchin eggs in snug, microscopic chambers shaped like triangles, squares, rectangl...ave similar proteins for the task, so any information gathered from the sea urchin research is relevant to human biology as well. Chang and Burgess hope to ap...

Small sea creatures may be the 'canaries in the coal mine' of climate change

...urgent research mission. She has performed extensive studies of the sea urchin that lives in the kelp forests of California. Sea urchins are a vital part ...lay a major economic role in California fisheries, since the roe of the sea urchin is a valuable sushi called uni. Hofmann explained that as marine invert...

Corals added to IUCN Red List of Threatened Species for first time

... algae species following strong El Ni o events is harmed by over-fishing of the natural predators of sea urchins, which feed on the algae. Mushrooming urchin populations scour rocks clean of algae, depleting a major food source for other species such as the Galapagos marine iguana. Marine ecosystems are ...

Incorrect lifestyle may be the cause of male infertility

...a Lewis, from the Department of Obstetrics and Gynaecology, who leads the Reproductive Medicine Research Group, said recent reports carried out on sea urchin sperm suggest that cannabis may be a major cause of infertility by inhibiting sperm functions necessary for fertilization. Scientists from Atlanta ...

The route to fertilization

...rple invertebrates found in the Pacific Ocean just a few yards from Epel's laboratory on California's Monterey Bay. Experiments reveal that normal sea urchin sperm contains an enzyme called nitric oxide synthase, which remains inactive until a few seconds before fertilisation. "As the sperm approaches...

Urchin in Medical Products

Urchin Heart Positioner

Description:... The urchin heart positioner provides excellent access to target coronaries while minimizing hemodynamic instability...
Company:Medtronic Inc.

Urchin in Biological News

Enigmatic sea urchin structure catalogued

A comprehensive investigation into the axial complex of sea urchins ( Echinoidea ), an internal structure with unknown function, has shown that within that group of marine invertebrates there exists a structural evolutionary interdependence of various internal organs. The research, published in Bi...

Sea urchin genome suprisingly similar to man and may hold key to cures

Sea urchins are small and spiny, they have no eyes and they eat kelp and algae. Still, the sea creature’s genome is remarkably similar to humans?and may hold the key to preventing and curing several human diseases, according to a University of Central Florida researcher and several colleagues. UC...

True grit

...used X-ray photoelectron emission spectromicroscopy and other high-resolution imaging methods to uncover yet another amazing structural feature of sea urchin tooth design. They found that all the crystalline elements that make up the tooth are aligned in two different arrays, and that these arrays are 'inte...

Caltech researchers help unlock the secrets of gene regulatory networks

...ch control when and where they are expressed," says Davidson, who authored a paper in the special feature about a gene regulatory network found in sea urchin embryos. He and Levine also coauthored a perspective in the same issue of the journal on the properties of gene regulatory networks. In one paper, ...

A crystal clear view of chalk formation

...ntervene If crystallization really did take this route, it would be easier to understand how mussels, for example, construct their shells or a sea urchin forms its spines. As the tiny clusters with which crystallization starts are stable, organisms would have to intervene only at this early stage to inf...

Bacterial biofilms as fossil makers

...arch presented in the PNAS paper reveals how bacteria-aided fossilization could happen. The Raffs studied early-stage embryos of two Australian sea urchin species, Heliocidaris erythrogramma and Heliocidaris tuberculata. The experimental results with modern embryos were compared to the high resolution im...

Decline in Alaskan sea otters affects bald eagles' diet

...e on the kelp's holdfasts and eat its tissue. When urchin populations become too large, they can defoliate e...eat the spiky urchins whole, making them the major urchin predator. The otters' presence keeps urchin populations in check and maintains the balance of ...

Acidification of the sea hampers reproduction of marine species

...he year 2100. The results are alarming. Like most invertebrates, the sea urchin multiplies by releasing its eggs to be fertilised in the open water. Howeve...gy working at the Sven Lovn Centre for Marine Sciences in Tjrn. The sea urchin studied by Jon Havenhand and Michael Thorndyke lives off the south coast of...

The good, the bad and the smelly: USGS at the 2008 Coral Reef Symposium

...uestion for reef resource managers. Some common reef algae, but not all, use chemical defenses to inhibit grazing by Caribbean reef fishes and the sea urchin Diadema antillarum. These chemical defenses may also influence competitive interactions between algae and corals. In this study, researchers found tha...

Genomics of large marine animals showcased in the biological bulletin

..., WOODS HOLE, MA Though the slow moving purple sea urchin may look oblivious, lacking a head, eyes and ears,... DNA sequences from a marine organism like the sea urchin into a genetic database, researchers can find similarities between sea urchin genes of an unknown function with, for example, hu...

Urchin in Biological Technology

Sea urchin yields a key secret of biomineralization

MADISON The teeth and bones of mammals, the protective shells of mollusks, and the needle-sharp spines of sea urchins and other marine creatures are made-from-scratch wonders of nature. Used to crush food, for structural support and for defense, the materials of which shells, teeth and bones a...

Examples of Electro-Transfected Eukaryotic and Prokaryotic Cells

...shmania, all species within the genus Marine organisms Photosynthetic bacteria Primary chicken oviduct Sea urchin egg Tetrahymena Thermotolerant bacteria Trypanosoma brucei (blood stream and procyclic forms) ...

The Bio-Rad Silver Stain, Rev E

...ormation in stained polyacrylamide gels, Anal Biochem 141, 311315 (1984) 65. Noll H et al., Characterization of toposomes from sea urchin blastula cells: a cell organelle mediating cell adhesion and expressing positional information, Proc Natl Acad Sci USA 82, 80628...

Urchin in Biological Definition

Developmental biology

...rerio Frogs Xenopus laevis Chicken Gallus gallus Mouse Mus musculus ( Mammalian embryogenesis ) Invertebrates Sea urchin Round worm Caenorhabditis elegans Fruit fly Drosophila melanogaster ( Drosophila embryogenesis ) Plants ( Plant embryogenesis ) ...

Urchin in Biological Dictionary

Vitelline membrane

...oduction): Formation of the fertilization membrane ) ...follow fertilization occur at the egg surface. The best known example, that of the sea urchin egg, is described below. An immediate response... ... open in the plasma membrane (BELOW the jelly coat/ vitelline layer. ... Thus, any additi...

Micromere

... RDA. ... At the onset of gastrulation, micromere progeny of the sea urchin embryo undergo ... Pmar1 protein activates the micromere specificatio... ... the specification of the skeletogenic micromere lineage of the sea urchin embryo. ... PLoS Biology is an open-access, peer-reviewed journal that f...

Heterogeneous nuclear RNA

... ... transcription units for heterogeneous nuclear RNA in cultured murine ... Sequence complexity of heterogeneous nuclear RNA in sea urchin embryos ... The complex set of nuclear RNA sequences driving this hybridization reaction was ... heterogeneous nuclear RNA synonyms. .....

Endoderm

...ther ... Endoderm : The innermost of the three primary germ layers of ... posted to ectoderm endoderm gastrulation migration pigment pmc urchin by adamsdi ... posted to endoderm nodal stem-cell by journal888 on 2005-05-27 15:06:24 as along ... number of loci involved in endoderm forma...

Acrosome reaction

...me reaction by direct immunofluorescence and flow cytometry ... Sea urchin Sperm Acrosome Reaction ... various stages of the acrosome reaction in sea urchin sperm. The acrosome vesicle undergoes exocytosis when the ... capaci...

Acrosome

...gether, ... The acrosome releases proteins that dissolve the ... Sea urchin Sperm Acrosome Reaction ... various stages of the acrosome reaction in sea urchin sperm. The acrosome vesicle undergoes exocytosis when the ... Zoolog...