(n.) Any large macrurous crustacean used as food, esp. those of the genus Homarus; as the American lobster (H. Americanus), and the European lobster (H. vulgaris). The Norwegian lobster (Nephrops Norvegicus) is similar in form. All these have a pair of large unequal claws. The spiny lobsters of more southern waters, belonging to Palinurus, Panulirus, and allied genera, have no large claws. The fresh-water crayfishes are sometimes called lobsters.
Example Sentences:
(1) Quantitative measurements for 5-HT in lobster larvae were performed using high pressure liquid chromatography (HPLC) with dual electrochemical detection and for proctolin using radioimmunoassay.
(2) However, the 'essential' cysteine residue 165 is replaced by threonine, as it is in the L-lactate dehydrogenase of lobster.
(3) The responses of a population of 30 olfactory receptor cells from spiny lobsters to 8 behaviorally relevant complex types of stimuli at 0.005, 0.05 and 0.5 mM were analyzed using multidimensional scaling to evaluate their potential for coding quality and intensity.
(4) Using a spectrophotometric method, the kinetics of the crustacean muscle enzyme was compared to the acetylcholinesterase (AChE) on mammalian red blood cells and in the lobster ventral nerve cord.
(5) In crustacean nerve 12-14% of the phospholipids was in the form of alkyl ether phospholipids, which in the lobster were approximately half choline-containing and half ethanolamine-containing.
(6) Extracellular responses to complex biologically relevant stimuli were recorded from 30 primary olfactory cells from excised antennules of spiny lobsters.
(7) Analogues of arginine inhibit the exchange reaction of the lobster enzyme but enhance that of the Holothuria enzyme.
(8) Earlier studies identified purinergic chemoreceptors in the olfactory organ of the spiny lobster, Panulirus argus.
(9) The last in a line of fishermen, his 87-year-old grandfather is still catching lobsters.
(10) In view of the small molecular size and high lipid solubility of methyl mercury and the lipophilic properties of the chitin-protein exoskeleton of the lobster, it is likely that significant uptake directly from the water as well as storage of absorbed methyl mercury occurred in the tail region.
(11) The strongest extension response was produced at 2 Hz which falls within the normal range of swimmeret beating in intact lobsters.
(12) Feathered hair sensilla fringe both rami of the lobster (Homarus americanus) swimmeret.
(13) Of the other alkali-metal ions tested, only Rb+ activated phosphofructokinase from lobster abdominal muscle and rat heart muscle.
(14) This type of innervation was compared between a small and a large lobster where a two-fold difference in mean quantal content of synaptic transmission was found.
(15) The in vitro rates of incorporation of precursors into protein and RNA and the concentration of RNA were measured in tissues of intermolt and premolt lobsters acclimated to 5 degrees C and 20 degrees C. Midgut gland, abdominal muscle and gill of intermolt lobsters respond to temperature acclimation by a compensatory translation of the rate-temperature (R-T) curves with respect to the rates of incorporation of 3H-leucine and 3H-uridine into the acid-insoluble fraction.
(16) The role of histidyls in lobster arginine kinase (EC 2.7.3.3) has been studied by 1H-NMR spectroscopy of the enzyme and its complexes with substrates or their analogues and 31P-NMR spectroscopy of complexes with ADP.
(17) When the monocarboxymethylated enzyme was briefly treated with small amounts of iodine, iodination could be confined almost entirely to tyrosine-46 in the lobster enzyme; tyrosine-39 or tyrosine-42, or both, were also beginning to react.
(18) You’d be hard pushed to find half a dozen fresh oysters at this great price.” Frozen food giant Iceland sparked lobster wars last month with what it claimed was the cheapest cooked crustacean in Britain.
(19) Estrone, 17 beta-estradiol, or 17 alpha-estradiol was formed by central neural tissues of all species, with the exception of the opossum, hagfish, and lobster.
(20) Two metallothionein (low-molecular-weight, metal-binding proteins) preparations, MT-1 and MT-2, have been isolated from the digestive gland of American lobster (Homarus americanus) contaminated with Cd.