A phylum of the most familiar marine invertebrates. Its class Stelleroidea contains two subclasses, the Asteroidea (the STARFISH or sea stars) and the Ophiuroidea (the brittle stars, also called basket stars and serpent stars). There are 1500 described species of STARFISH found throughout the world. The second class, Echinoidea, contains about 950 species of SEA URCHINS, heart urchins, and sand dollars. A third class, Holothuroidea, comprises about 900 echinoderms known as SEA CUCUMBERS. Echinoderms are used extensively in biological research. (From Barnes, Invertebrate Zoology, 5th ed, pp773-826)
A genus of SEA URCHINS in the family Arbaciidae. They have only one spheridium (stalked body) per ambulacral area (contains tube feet); most sea urchins have several spheridia per area.
Somewhat flattened, globular echinoderms, having thin, brittle shells of calcareous plates. They are useful models for studying FERTILIZATION and EMBRYO DEVELOPMENT.
A mature haploid female germ cell extruded from the OVARY at OVULATION.
The fusion of a spermatozoon (SPERMATOZOA) with an OVUM thus resulting in the formation of a ZYGOTE.
Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility.
The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.
Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.
The pattern of GENE EXPRESSION at the level of genetic transcription in a specific organism or under specific circumstances in specific cells.
A species of gram-negative bacteria producing mild to severe ANAPLASMOSIS in SHEEP and GOATS, and mild or inapparent infections in DEER and CATTLE.
The MEDITERRANEAN SEA, the MEDITERRANEAN ISLANDS, and the countries bordering on the sea collectively.
A functional system which includes the organisms of a natural community together with their environment. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)
A genus of SEA URCHINS in the family Toxopneustidae possessing trigeminate ambulacral plating.
A body of water covering approximately one-fifth of the total ocean area of the earth, extending amidst Africa in the west, Australia in the east, Asia in the north, and Antarctica in the south. Including the Red Sea and the Persian Gulf, it constitutes the third largest ocean after the ATLANTIC OCEAN and the PACIFIC OCEAN. (New Encyclopaedia Britannica Micropaedia, 15th ed, 1990, p289)
Rare congenital disorder with multiple anomalies including: characteristic dysmorphic craniofacial features, musculoskeletal abnormalities, neurocognitive delay, and high prevalence of cancer. Germline mutations in H-Ras protein can cause Costello syndrome. Costello syndrome shows early phenotypic overlap with other disorders that involve MAP KINASE SIGNALING SYSTEM (e.g., NOONAN SYNDROME and cardiofaciocutaneous syndrome).
The study of the origin, structure, development, growth, function, genetics, and reproduction of organisms which inhabit the OCEANS AND SEAS.
Discussion of lists of works, documents or other publications, usually with some relationship between them, e.g., by a given author, on a given subject, or published in a given place, and differing from a catalog in that its contents are restricted to holdings of a single collection, library, or group of libraries. (from The ALA Glossary of Library and Information Science, 1983)
A list of works, documents, and other publications on medical subjects and topics of interest to the field of medicine.
Organisms that live in water.
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
Carbonic acid calcium salt (CaCO3). An odorless, tasteless powder or crystal that occurs in nature. It is used therapeutically as a phosphate buffer in hemodialysis patients and as a calcium supplement.
Graphic representations, especially of the face, of real persons, usually posed, living or dead. (From Thesaurus for Graphic Materials II, p540, 1995)
A species of SEA URCHINS in the family Strongylocentrotidae found on the Pacific coastline from Alaska to Mexico. This species serves as a major research model for molecular developmental biology and other fields.
Chemicals used to destroy pests of any sort. The concept includes fungicides (FUNGICIDES, INDUSTRIAL); INSECTICIDES; RODENTICIDES; etc.
Software used to locate data or information stored in machine-readable form locally or at a distance such as an INTERNET site.
Pesticides or their breakdown products remaining in the environment following their normal use or accidental contamination.
Organized activities related to the storage, location, search, and retrieval of information.
A loose confederation of computer communication networks around the world. The networks that make up the Internet are connected through several backbone networks. The Internet grew out of the US Government ARPAnet project and was designed to facilitate information exchange.
An activity in which the organism plunges into water. It includes scuba and bell diving. Diving as natural behavior of animals goes here, as well as diving in decompression experiments with humans or animals.
Marine ridges composed of living CORALS, coral skeletons, calcareous algae, and other organisms, mixed with minerals and organic matter. They are found most commonly in tropical waters and support other animal and plant life.
A great expanse of continuous bodies of salt water which together cover more than 70 percent of the earth's surface. Seas may be partially or entirely enclosed by land, and are smaller than the five oceans (Atlantic, Pacific, Indian, Arctic, and Antarctic).
Aquatic invertebrates belonging to the phylum MOLLUSCA or the subphylum CRUSTACEA, and used as food.
Poisoning from toxins present in bivalve mollusks that have been ingested. Four distinct types of shellfish poisoning are recognized based on the toxin involved.
Cultivation of natural faunal resources of water. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Toxic or poisonous substances elaborated by marine flora or fauna. They include also specific, characterized poisons or toxins for which there is no more specific heading, like those from poisonous FISHES.
A family of marine mollusks in the class BIVALVIA, commonly known as oysters. They have a rough irregular shell closed by a single adductor muscle.
A class in the phylum MOLLUSCA comprised of mussels; clams; OYSTERS; COCKLES; and SCALLOPS. They are characterized by a bilaterally symmetrical hinged shell and a muscular foot used for burrowing and anchoring.
A publication issued at stated, more or less regular, intervals.
The field of biology which deals with the process of the growth and differentiation of an organism.
Contractile tissue that produces movement in animals.
The protein constituents of muscle, the major ones being ACTINS and MYOSINS. More than a dozen accessory proteins exist including TROPONIN; TROPOMYOSIN; and DYSTROPHIN.
Based on known statistical data, the number of years which any person of a given age may reasonably expected to live.
Protein analogs and derivatives of the Aequorea victoria green fluorescent protein that emit light (FLUORESCENCE) when excited with ULTRAVIOLET RAYS. They are used in REPORTER GENES in doing GENETIC TECHNIQUES. Numerous mutants have been made to emit other colors or be sensitive to pH.
A subtype of striated muscle, attached by TENDONS to the SKELETON. Skeletal muscles are innervated and their movement can be consciously controlled. They are also called voluntary muscles.

Revisiting the role of H+ in chemotactic signaling of sperm. (1/6)

Chemotaxis of sperm is an important step toward fertilization. During chemotaxis, sperm change their swimming behavior in a gradient of the chemoattractant that is released by the eggs, and finally sperm accumulate near the eggs. A well established model to study chemotaxis is the sea urchin Arbacia punctulata. Resact, the chemoattractant of Arbacia, is a peptide that binds to a receptor guanylyl cyclase. The signaling pathway underlying chemotaxis is still poorly understood. Stimulation of sperm with resact induces a variety of cellular events, including a rise in intracellular pH (pHi) and an influx of Ca2+; the Ca2+ entry is essential for the chemotactic behavior. Previous studies proposed that the influx of Ca2+ is initiated by the rise in pHi. According to this proposal, a cGMP-induced hyperpolarization activates a voltage-dependent Na+/H+ exchanger that expels H+ from the cell. Because some aspects of the proposed signaling pathway are inconsistent with recent results (Kaupp, U.B., J. Solzin, J.E. Brown, A. Helbig, V. Hagen, M. Beyermann, E. Hildebrand, and I. Weyand. 2003. Nat. Cell Biol. 5:109-117), we reexamined the role of protons in chemotaxis of sperm using kinetic measurements of the changes in pHi and intracellular Ca2+ concentration. We show that for physiological concentrations of resact (<25 pM), the influx of Ca2+ precedes the rise in pHi. Moreover, buffering of pHi completely abolishes the resact-induced pHi signal, but leaves the Ca2+ signal and the chemotactic motor response unaffected. We conclude that an elevation of pHi is required neither to open Ca(2+)-permeable channels nor to control the chemotactic behavior. Intracellular release of cGMP from a caged compound does not cause an increase in pHi, indicating that the rise in pHi is induced by cellular events unrelated to cGMP itself, but probably triggered by the consumption and subsequent replenishment of GTP. These results show that the resact-induced rise in pHi is not an obligatory step in sperm chemotactic signaling. A rise in pHi is also not required for peptide-induced Ca2+ entry into sperm of the sea urchin Strongylocentrotus purpuratus. Speract, a peptide of S. purpuratus may act as a chemoattractant as well or may serve functions other than chemotaxis.  (+info)

Ca2+ spikes in the flagellum control chemotactic behavior of sperm. (2/6)

The events that occur during chemotaxis of sperm are only partly known. As an essential step toward determining the underlying mechanism, we have recorded Ca2+ dynamics in swimming sperm of marine invertebrates. Stimulation of the sea urchin Arbacia punctulata by the chemoattractant or by intracellular cGMP evokes Ca2+ spikes in the flagellum. A Ca2+ spike elicits a turn in the trajectory followed by a period of straight swimming ('turn-and-run'). The train of Ca2+ spikes gives rise to repetitive loop-like movements. When sperm swim in a concentration gradient of the attractant, the Ca2+ spikes and the stimulus function are synchronized, suggesting that precise timing of Ca2+ spikes controls navigation. We identified the peptide asterosap as a chemotactic factor of the starfish Asterias amurensis. The Ca2+ spikes and swimming behavior of sperm from starfish and sea urchin are similar, implying that the signaling pathway of chemotaxis has been conserved for almost 500 million years.  (+info)

Assessment of sperm chemokinesis with exposure to jelly coats of sea urchin eggs and resact: a microfluidic experiment and numerical study. (3/6)

Specific peptides contained within the extracellular layer, or jelly coat, of a sea urchin egg have been hypothesized to play an important role in fertilization, though separate accounting of the effects of chemoattraction, chemokinesis, sperm agglomeration and the other possible roles of the jelly coat have not been reported. In the present study, we used a microfluidic device that allowed determination of the differences in the diffusion coefficients of sperm of the purple sea urchin Arbacia punctulata subjected to two chemoattractants, namely the jelly coat and resact. Our objectives were twofold: (1) to experimentally determine and compare the diffusion coefficients of Arbacia punctulata spermatozoa in seawater, jelly coat solution and resact solution; and (2) to determine the effect of sea urchin sperm diffusion coefficient and egg size on the sperm-egg collision frequency using stochastic simulations. Numerical values of the diffusion coefficients obtained by diffusing the spermatozoa in seawater, resact solution and jelly coat solution were used to quantify the chemotactic effect. This allowed direct incorporation of known enlargements of the egg, and altered sperm diffusion coefficients in the presence of chemoattractant, in the stochastic simulations. Simulation results showed that increase in diffusion coefficient values and egg diameter values increased the collision frequency. From the simulation results, we concluded that type of sperm, egg diameter and diffusion coefficient are significant factors in egg fertilization. Increasing the motility of sperm appears to be the prominent role of the jelly coat.  (+info)

Multiple processes regulate long-term population dynamics of sea urchins on Mediterranean rocky reefs. (4/6)

 (+info)

Natural or naturalized? Phylogeography suggests that the abundant sea urchin Arbacia lixula is a recent colonizer of the Mediterranean. (5/6)

 (+info)

Direct relationship between osmotic and ionic conforming behavior and tissue water regulatory capacity in echinoids. (6/6)

 (+info)

The sea urchin Arbacia lixula is a keystone species in Mediterranean ecosystems that drive landscape changes in littoral communities. However, genomic information available for the whole order Arbacioida is very limited. Using RNA-seq techniques, we have characterized the transcriptome of four different tissue types in A. lixula: the somatic tissues (coelomocytes and digestive tissue) and the reproductive tissues (ovary and testis), from two replicated cDNA libraries for each sample. Additionally, we performed a de novo assembly to build the reference transcriptome, pooling reads of the four tissues, to analyse the differential expression (DE) in pairwise comparisons between tissues. The complete de novo assembly yielded 186 084 transcripts, with a sequence size limit of 100 nt, being 31% of them spliced isoforms. Approximately 21% of the transcripts had blast hits against proteins of metazoans (E , 10 5), being less than 2.2% functionally annotated. Between coelomocytes and digestive, 30 ...
Sea urchins can be found throughout the Brazilian coast and are reported to be one of the major causes of marine accidents on the shoreline. Although not lethal, these accidents are reported to be extremely painful. In order to understand the toxinology of the Brazilian urchins, a peptidomic app...
得到博士學位後,亨特返回紐約歐文·倫敦的實驗小組,跟其他成員一同發現小量氧化了的穀胱甘肽(即GSSG)便足以抑制網狀紅血球合成蛋白質的能力,以及雙鏈核糖核酸(雙鏈RNA)完全制止了蛋白質合成。回到劍橋大學後,他與安東尼·亨特和理查德·傑克遜(英語:Richard Jackson (biochemist))一起工作。二人較早前發現了啟動血紅素合成的核糖核酸(RNA),即如今科學界認識的甲硫胺酸-轉運核糖核酸複合體。3至4年後,三人再發現最少兩個能夠抑制血紅素合成的化學物[13]。. 此外,亨特也定期在夏天於麻薩諸塞州海洋生物學實驗室(英語:Marine Biological Laboratory)工作。1982年夏,他在海洋生物學實驗室以其中一種海膽Arbacia punctulata(英語:Arbacia ...
得到博士學位後,亨特返回紐約歐文·倫敦的實驗小組,跟其他成員一同發現小量氧化了的穀胱甘肽(即GSSG)便足以抑制網狀紅血球合成蛋白質的能力,以及雙鏈核糖核酸(雙鏈RNA)完全制止了蛋白質合成。回到劍橋大學後,他與安東尼·亨特和理查德·傑克遜(英語:Richard Jackson (biochemist))一起工作。二人較早前發現了啟動血紅素合成的核糖核酸(RNA),即如今科學界認識的甲硫胺酸-轉運核糖核酸複合體。3至4年後,三人再發現最少兩個能夠抑制血紅素合成的化學物[13]。. 此外,亨特也定期在夏天於麻薩諸塞州海洋生物學實驗室(英語:Marine Biological Laboratory)工作。1982年夏,他在海洋生物學實驗室以其中一種海膽Arbacia punctulata(英語:Arbacia ...
additional source Lessios, H. A., Lockhart, S., Collin, R., Sotil, G., Sanchez-Jerez, P., Zigler, K. S., Perez, A. F., Garrido, M. J., Geyer, L. B., Bernardi, G., Vaquier, V. D., Haroun, R. & Kessing, B. D. 2012. Phylogeography and bindin evolution in Arbacia, a sea urchin genus with an unusual distribution. Molecular Ecology 21, 130-144., available online at https://doi.org/10.1111/j.1365-294x.2011.05303.x [details] ...
Abstract: Enhanced diffusion and anti-chemotaxis of enzymes have been reported in several experiments in the last decade, opening up entirely new avenues of research in the bio-nanosciences both at the applied and fundamental level. Here, we introduce a novel theoretical framework, rooted in non-equilibrium effects characteristic of catalytic cycles, that explains all observations made so far in this field. In addition, our theory predicts entirely novel effects, such as dissipation-induced switch between anti-chemotactic and chemotactic behavior ...
Cleavage in embryos of the sea urchin Arbacia punctulata consists of eight very rapid divisions that require continual protein synthesis to sustain them. This synthesis is programmed by stored maternal mRNAs, which code for three or four particularly abundant proteins whose synthesis is barely if at all detectable in the unfertilized egg. One of these proteins is destroyed every time the cells divide. Eggs of the sea urchin Lytechinus pictus and oocytes of the surf clam Spisula solidissima also contain proteins that only start to be made after fertilization and are destroyed at certain points in the cell division cycle. We propose to call these proteins the cyclins. ...
Toilet supply lines at discount prices when you shop with PlumbersStock. Buy flexible toilet water supply lines for cheap with the plumbing experts.
3/8compression x 7/8 fill valve x 20, toilet water supply line, engineered polymer braid, bulk with flag label, overall size 21.00l x 4.00w x 3.50d.
A large, gregarious mammal, the sea lion ranges along the western coast of North America. In the water, their torpedo-shaped bodies can reach speeds of 25 to 30 miles per hour (40 to 48 kilometer per hour).
This study will treat participants with newly diagnosed, low, intermediate and high risk rhabdomyosarcoma (RMS) using multi-modality risk-adapted therapy
In general as far as I know customers who bought Isle of Dogs Coature No. 91 Royal Jelly Coat Supplement for Dogs with thin or shedding coats, 1 liter or other products in the Internet also were interested in reviews, cheap & lowest prices in outlets and stores, shipping, gift ideas, city deals, sales, coupons online, new, holiday & daily deals, bargain, best buy products including special offers on Isle of Dogs Coature No. 91 Royal Jelly Coat Supplement for Dogs with thin or shedding coats, 1 liter, best deals, discount coupons, top & hot deals, great offers, last minute deals and so on ...
I just moved in to a 5 year old house. The toilet on the first floor has hot water in the tank. When I have guest and the toilet is flushed 4 or 5 times, the water gets very hot and creates lots of steam. I called the builder and said I believe the hot supply is connected to the tank instead of the cold supply. He said that was impossible and refused to come and look at the toilet. Is there any other explanation? Also, the basement is finished so I cannot see the supply pipes leading to the first floor basement.
All pieces are sold with a full description of the fossil and its origins, and comes with a money-back, lifetime guarantee of authenticity ...
All pieces are sold with a full description of the fossil and its origins, and comes with a money-back, lifetime guarantee of authenticity ...
Pulsed proton nuclear magnetic resonance was used to differentiate between normal and malignant tissues. When the tissue water content varied from 80 to 93%, the tumors exhibited spin-lattice relaxation times (T1) from 0.9 to 1.8 sec. We report also the results obtained on 9-day-old embryos and on liver, brain, and heart from 2-day-old rats. A good correlation between the spin-lattice (T1) and spin-spin (T2) relaxation times and the tissue water content was found for all tissues studied. The relaxation times T1 and T2 and water content in Walker 256 carcinoma and its lymph node metastasis were quite similar.
Ice from fast food beverage machines is dirtier than the water in your toilet. Thats according to research conducted by a 12-year old girl in…
Addisons disease, also known as hypoadrenocorticism, is a disease in dogs in which the adrenal glands outer layer, the cortex, is destroyed. Read about signs of Addisons disease, the cost of treatment, and how it can be prevented from Embrace Pet Insurance.
Chemokinesis is chemically prompted kinesis, a motile response of unicellular prokaryotic or eukaryotic organisms to chemicals that cause the cell to make some kind of change in their migratory/swimming behaviour. Changes involve an increase or decrease of speed, alterations of amplitude or frequency of motile character, or direction of migration. However, in contrast to chemotaxis, chemokinesis has a random, non-vectorial moiety, in general. Due to the random character, techniques dedicated to evaluate chemokinesis are partly different from methods used in chemotaxis research. One of the most valuable ways to measure chemokinesis is computer-assisted (see, e.g., Image J) checker-board analysis, which provides data about migration of identical cells, whereas, in Protozoa (e.g., Tetrahymena), techniques based on measurement of opalescence were also developed. Becker EL (1977). Stimulated neutrophil locomotion: chemokinesis and chemotaxis. Arch Pathol Lab Med. 101 (10): 509-13. PMID 199132. ...
A homeless Melbourne man was arrested for possession of heroin after police say he was washing himself with toilet water inside a Subway sandwich restaurant.
Chemokinesis definition: the random movement of cells, such as leucocytes , stimulated by substances in their... | Meaning, pronunciation, translations and examples
Whoops.. You move into a new house and time just flies right by doesnt it?. It may be that Im drowning in boxes.. Or that my downstairs ceiling is leaking upstairs toilet water.. It may be that I am completely consumed with the fact that I have five light switches that control nothing.. Perhaps its because my baby, my one and only offspring TURNS FIVE TOMORROW.. Ive also been concerned about the heating vent RIGHT above the head of my bed that bakes my boogers as I sleep leaving me a stuffy crusty mess each morning. (Youre soooo welcome for THAT visual.). Also? Theres a lot of room in big houses for funny noises to happen. Funny noises bother me almost as bad as light switches to nowhere but not nearly as bad as residual toilet water dripping on my head.. And dude, the ladybugs? Seriously, I was always all LOVE THE LADYBUG growing up but apparently I moved to the one place in the country where all the ladybugs go to die. You can only have so many crispy ladybug carcasses jump out at you ...
I wish I had a better story involving wild sex, drugs, or fighting off a home invasion about how my beloved iPhone 4 ended up in a toilet this morning. Actually...Id put the phone on some magazines that were headed...
I wish I had a better story involving wild sex, drugs, or fighting off a home invasion about how my beloved iPhone 4 ended up in a toilet this morning. Actually...Id put the phone on some magazines that were headed...
This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code I09.89 and a single ICD9 code, 398.99 is an approximate match for comparison and conversion purposes. ...
To test whether lysosomal degranulation of phagocytes is associated with antibody-dependent cytotoxicity, eggs of Arbacia punctulata were used as targets for blood phagocytes of Mustelus canis. Eggs were coated with heat-aggregated dogfish IgM and exposed to phagocytes, and cytolysis of eggs was observed by Nomarski optics. Phagocytes adhered, degranulated, and raised fertilization membranes resembling those induced by sperm or ionophore A23187. Lysis was then observed as damage radiating from the point of phagocyte-egg contact. By 4 hr, coated eggs exposed to phagocytes released 8.9, 12.3, and 7.4% of total catalase (EC 1.11.1.6), beta-glucuronidase (EC 3.2.1.31), and superoxide dismutase (EC 1.15.1.1) into the medium. Cytotoxic enzyme release significantly exceeded that from uncoated eggs incubated with phagocytes or eggs alone (uncoated or coated). Because activated eggs release a neutral protease, it was considered possible that this enzyme might be responsible for autolysis of eggs. This ...
Existence and degree of somatic mutation of expressed Ig V genes stratify CLL cases into unmutated (U-CLL) and mutated (M-CLL), clinically distinct subgroups. CLL cells likely receive survival cues via interactions through their BCR, TLR, and cytokine/chemokine receptors. We reported ex vivo expression of CCR4 and its induction on CLL cells stimulated in vitro. In assays of chemotactic behavior in response to CCL17, migrated cells showed significantly higher percentages and densities of CD38 expression than the non-migrated cells suggesting a role for CD38 (a known marker of CLL prognosis) in the CCR4-mediated downstream pathway. Dendritic cell-derived CCL17 may exert an accessory role in BCR- and TLR-9-mediated immune responses in B cells in peripheral organs. CCL17 augmented BCR-mediated B-cell proliferation in 9/16 (56%) U-CLL cases, and in 3/15 (20%) M-CLL cases, and promoted TLR-9-mediated cell proliferation in 13/15(87%) M-CLL cases and 6/16 U-CLL cases. In addition, CCL17 promoted cell ...
"Encyclopedia Of Life (EOL) ''Arbacia punctulata''". EOL. 2011-10-14. Retrieved 2013-10-18. "World Register of Marine Species ( ... WoRMS) ''Arbacia punctulata'' (Lamarck, 1816) AphiaID: 158058". Marinespecies.org. Retrieved 2013-10-18. "World Register of ...
Arbacia stellata Arbaciella elegans Argopatagus vitreus Kroh, A. (2010). Argopatagus planus (A. Agassiz & H.L. Clark, 1907). In ...
Araeosoma tessellatum Araeosoma thetidis Arbacia crassispina Kroh, A. (2010). Araeosoma violaceum (Ole Theodor Jensen Mortensen ...
Arbacia spatuligera Arbacia stellata Argopatagus planus Kroh, A. (2010). Arbaciella elegans (Ole Theodor Jensen Mortensen, 1910 ... It is placed in the genus Arbacia and lives in the sea. Arbaciella elegans was first scientifically described in 1910 by Ole ...
Her dissertation was titled Genotypic and Phenotypic Variation in the Sea Urchin Arbacia Punctulata (Gray). She dedicated her ... Marcus, Nancy H (1976). Genotypic and Phenotypic Variation in the Sea Urchin Arbacia Punctulata (Gray) (Thesis). New Haven, CT ...
... while galactolipids act as herbivore deterrents against the sea urchin Arbacia punctulata. Methyl jasmonate may induce the ...
Determining its brief existence, volumetric changes, and vital role in cleaving Arbacia eggs". J. Cell Biol. 53 (2): 419-34. ...
Arbacia punctulata, the Atlantic purple sea urchin Ricketts EF, Calvin J. Between Pacific Tides. 3rd Rev. edn. 1962 by J.W. ...
... anatomy based on Arbacia sp.. Urchins typically range in size from 3 to 10 cm (1 to 4 in), although the largest ...
Ward, G.E., Brokaw, C.J., Garbers, D.L. and Vacquier, V.D. (1985) Chemotaxis of Arbacia punctulata spermatozoa to resact, a ... The current knowledge is mainly based on studies in the sea urchin Arbacia punctulata, where binding of the chemoattractant ... A model of the signal-transduction pathway during sperm chemotaxis of the sea urchin Arbacia punctulata. Binding of a ...
Figure 1. A model of the signal-transduction pathway during sperm chemotaxis of the sea urchin Arbacia punctulata. Binding of a ... The current knowledge is mainly based on studies in the sea urchin Arbacia punctulata, where binding of the chemoattractant ...
... that act as herbivore deterrents against the sea urchin Arbacia punctulata. Phlorotannins are mostly located at the periphery ...
Allocentrotus fragilis Arbacia lixula Cidaris cidaris Echinus esculentus Paracentrotus lividus Psammechinus miliaris ...
Merisiilik (Arbacia punctulata, Strongylocentrotus purpuratus) on klassikaline uurimisalune embrüoloogilistes uuringutes ja ...
It was at Woods Hole in the Summer of 1982, using the sea urchin (Arbacia punctulata) egg as his model organism, that he ...
Aransio 89973 Aranyjános 96205 Ararat 20038 Arasaki 18644 Arashiyama 12152 Aratus 15810 Arawn 16077 Arayhamilton 128474 Arbacia ...
Anomia simplex Antalis Antigona Arbacia Arca †Arca imbricata Architectonica Arcinella †Arcinella arcinella †Arcinella cornuta † ...
Araloselachus cuspidata ArbaciaArbacia improcera Arca †Arca imbricata †Arca incongrua †Archaeodelphis - type locality for ...
... arbacia MeSH B01.500.408.578.400 - hemicentrotus MeSH B01.500.408.578.500 - lytechnius MeSH B01.500.408.578.600 - paracentrotus ...
Anthus spinoletta Aporrhais Arbacia †Archaeohippus †Archaeomanta Architectonica †Arctodus †Arctodus simus Argobuccinum ...
It contains these genera: Arbacia Gray, 1835 Arbaciella Mortensen, 1910a Arbia Cooke, 1948† Baueria Noetling, 1885† Codiopsis ...
Arbacia lixula, the Black Sea Urchin Echinus saxatilis Echinus diadema - Echinothrix diadema, the Diadema Urchin Echinus ...
... a Salenioida Arbacia lixula, an Arbacioida Strongylocentrotus franciscanus, a Camarodonta Stomopneustes variolaris, a ...
Sea urchins such as Arbacia punctulata are ideal organisms to use in sperm research, they spawn large numbers of sperm into the ...
Smooth Astarte Sand dollar Arbacia punctulata = Atlantic Purple Sea Urchin Strongylocentrotus droebachiensis = Common Green Sea ...
... may refer to: Aethalura punctulata, the grey birch, a moth species found in Europe Arbacia punctulata, a sea ...
Arbacia lixula) Triggerfish (Balistes carolinensis) Hermit crab (Calcinus tubularis) Octopus (Octopus vulgaris) Starfish ( ...
Araloselachus cuspidata ArbaciaArbacia improcera †Archaeohippus †Archaeomanta †Archaeomanta melenhorsti Architectonica † ...
128373 Kevinjohnson 128389 Dougleland 128408 Mikehughes 128417 Chrismccaa 128426 Vekerdi 128439 Chriswaters 128474 Arbacia ...
Arbacia †Arbacina †Arbia (genus) †Archaechinus †Archaeocalyptocrinus †Archaeocidaris †Archaeocothurnus †Archaeocrinus † ...
Hyperbaric oxygen and embryonic development in Arbacia punctulata.. Oct 1, 1972 , Germ Cell , 0 comments ... Heidger, Summers, Miller, , , , , , (1972). Hyperbaric oxygen and embryonic development in Arbacia punctulata. The Biological ...
Temporal and spatial differences in the reproductive biology of the sea urchin Arbacia dufresnii ... Temporal and spatial differences in the reproductive biology of the sea urchin Arbacia dufresnii ... Temporal and spatial differences in the reproductive biology of the sea urchin Arbacia dufresnii. ...
Arbacia incisa GCN, GCC, GCS, RB, SWB 0 - 52 PET, PNET, PSET, IGAL ...
Arbacia 17.12.2018 in 01:44. If, however, youre looking for backbone, reality, and someone wholl. ...
... out free tickets for Celtic matches and drinks from the bar in his home.He played a central role in MI5s Operation Arbacia, ...
Operation Arbacia: Derry man Paddy McDaid refused bail. June 22, 2021 * Bloody Sunday: Court upholds Soldier F anonymity order ...
emporal variability in abundance of the sea urchins Paracentrotus lividus and Arbacia lixula in the northwestern Mediterranean ...
arba cia: http://www.zerohedge.com/article/matt-taibbis-latest-why-isnt-wall-street-jail ...
Genus Arbacia * Species Arbacia lixula * Order Temnopleuroida * Family Toxopneustidae * Genus Lytechinus * Species Lytechinus ...
Genus Arbacia * Species Arbacia lixula * Order Temnopleuroida * Family Toxopneustidae * Genus Lytechinus * Species Lytechinus ...
deter feeding by an herbivorous amphipod (Ampithoe longimana) but not by an herbivorous sea urchin (Arbacia punctulata) ... deter feeding by an herbivorous amphipod (Ampithoe longimana) but not by an herbivorous sea urchin (Arbacia punctulata). ... deter feeding by an herbivorous amphipod (Ampithoe longimana) but not by an herbivorous sea urchin (Arbacia punctulata) ...
Phototaxis in the sea urchin, Arbacia punctulata. . J. Anim. Behav.. 2. , 126 ...
Further Studies on the action of salt-solutions and of other agents on the Eggs of Arbacia. Ebenda. X. 489-524. 19001. --- The ... The action of salt-solutions on the unfertilized and fertilized Eggs of Arbacia and of other animals. Ebenda. VIII. 448-539. ...
Homarus gammarus is a threatened commercial species.The Tunicata Microcosmus sulcatus and the Echinodermata Arbacia lixula and ...
... and the Paracentrotus lividus or Arbacia lixula sea urchins, but no interactions were observed ...
  • The genetic structure of 13 populations of the amphiatlantic sea urchin Arbacia lixula, as well as temporal genetic changes in three of these localities, were assessed using ten hypervariable microsatellite loci. (csic.es)
  • The sea urchin Arbacia lixula is a keystone species in Mediterranean ecosystems that drive landscape changes in littoral communities. (csic.es)
  • The Azorean barnacle ( Megabalanus azoricus ), black sea urchin ( Arbacia lixula ), stony sea urchin ( Paracentrotus lividus ), bearded fireworm ( Hermodice carunculata ), Azorean limpet ( Patella aspera ), limpet ( Patella candei ), slipper lobster ( Scyllarides latus) , and lobster ( Palinuros elephas) are the most abundant species in the intertidal as well as in the first few meters of the subtidal (Dionísio et al . (ices.dk)
  • U tom kontekstu, cilj ove doktorske studije jest karakterizirati AgNP u morskoj vodi te ispitati njihov utjecaj na morske beskralježnjake: embrije ježinaca Arbacia lixula, Paracentrotus lividus i Sphaerechinus granularis. (nsk.hr)
  • Densities of the black sea urchin Arbacia lixula were significantly greater along the windward than along the leeward sides of the islands, and were positively correlated with the extent of coralline barrens. (rac-spa.org)
  • Estimación del crecimiento del erizo de mar Arbacia lixula (Master's thesis). (ucr.ac.cr)
  • Arbacia punctulata is a common urchin from Cape Cod to the West Indies. (animaldiversity.org)
  • The Arbacia punctulata has a deep purple color all over the spines and body (test). (animaldiversity.org)
  • The purple sea urchin, Arbacia punctulata , has been thriving in waters across the world for years and hopefully will continue to. (animaldiversity.org)
  • He has studied various other topics all using Arbacia punctulata as his primary subject. (animaldiversity.org)
  • Sperm of the sea urchin Arbacia punctulata display an extreme sensitivity for their chemoattractant. (mpg.de)
  • In fact, Arbacia punctulata sperm can sense a single molecule of chemoattractant. (sciencemag.org)
  • Metabolic activities and cleavage of eggs of the sea urchin, Arbacia punctulata. (nii.ac.jp)
  • Anderson DM, Galau GA, Britten RJ, Davidson EH (1976) Sequence complexity of RNA accumulated in oocytes of Arbacia punctulata . (springer.com)
  • In Arbacia punctulata, a model system of sperm chemotaxis, a cGMP signaling pathway controls these Ca(2+) bursts. (nih.gov)
  • Chemotaxis of Arbacia punctulata spermatozoa to resact, a peptide from the egg jelly layer. (google.ca)
  • Zoospore germination and gametophyte growth were as sensitive to SDS as sea urchin ( Arbacia punctulata ) fertilization and embryological development. (usgs.gov)
  • 2007, table 2.9, p 29) lists some more data on marine organisms, i.e an echinoderm ( Arbacia punctulata ), a snail ( Cardium edule ) and an annelid ( Ophryotrocha diadema ), but the authors considered them unreliable. (europa.eu)
  • Cleavage in embryos of the sea urchin Arbacia punctulata consists of eight very rapid divisions that require continual protein synthesis to sustain them. (gla.ac.uk)
  • Arbacia is a genus of sea urchins, widespread in the Atlantic and eastern Pacific oceans. (wikipedia.org)
  • Araeosoma thetidis Araeosoma violaceum Arbacia dufresnii Kroh, A. (2010). (wikipedia.org)
  • Insemination of sea urchin (Arbacia) ova with mussel (Mytilus) sperm has been accomplished by treating eggs with trypsin and suspending the gametes in seawater made alkaline with NaOH. (rupress.org)
  • Evidence is presented which suggests that fusion of the male pronuclei from Mytilus sperm with female pronuclei from Arbacia eggs may occur, although this was not directly observed. (rupress.org)
  • These results demonstrate that Mytilus sperm nuclei are able to react to conditions within Arbacia eggs and differentiate into male pronuclei. (rupress.org)
  • 1969. Sperm differentiation in the sea urchin Arbacia punctata and Strongylocentrotus purpuratus. (scielo.br)
  • 1940) concerning the depressant action ofseveral barbiturates on arbacia eggs has been found applicable to the action of pentobarbital on turtle and rabbit cardiac tissue within a restricted pH range. (aspetjournals.org)
  • Arbacia eggs 32 cells, 400X w.m. (petroarcintl.com)
  • The ecotoxicological evaluation of the sediments was performed using fertilization assays with gametes of Arbacia spatuligera (EPA/600/4-91/003). (scielo.cl)
  • Además, se realizó la evaluación ecotoxicológica de los sedimentos mediante pruebas de fecundación con gametos de Arbacia spatuligera (EPA/600/4-91/003), resultados que indican que sobre el 95% de ovas fueron fecundadas, valor semejante a los controles, lo que permite clasificar a los sedimentos de las estaciones ubicadas en el centro de los canales como no tóxicos. (scielo.cl)
  • Arbacia crassispina (Ole Theodor Jensen Mortensen, 1910). (wikipedia.org)
  • Arbacia crassispina is a species of sea urchin of the family Arbaciidae. (wikipedia.org)
  • An ultrastructural study of cross-fertilization (Arbacia female x Mytilus male). (rupress.org)