Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| a comparison of calcium binding in callinectes sapidus premolt and postmolt cuticle homogenates: implications for regulation of biomineralization. | cuticle tissue homogenates (cths) from callinectes sapidus premolt cuticle bound approximately 367% more ca2+ ions than did those from the postmolt cuticle. the ph-stat assay which was used to compare in vitro caco3 nucleation times confirmed that the premolt cths had greater inhibitory activity than did the postmolt cths. this inhibitory activity was indicated by caco3 nucleation times in excess of control values. premolt nucleation times exceeded those of postmolt samples by approximately 340% ... | 1995 | 8747426 |
| complete primary structure of the molt-inhibiting hormone (mih) of the mexican crayfish procambarus bouvieri (ortmann). | the amino acid sequence of mih was elucidated by means of digestions with specific proteases, manual edman degradation, and mass spectrometry. mih consists of a 72-residue peptide chain (molecular mass 8322 da) with six cysteines forming three disulfide bridges that connect residues 7-43, 23-39, and 26-52. it has blocked n- and c-termini and lacks tryptophan, histidine, and methionine. mih shows striking similarity to the crustacean hyperglycemic hormone (chh) isomorphs of procambarus bouvieri ( ... | 1996 | 8735961 |
| proctolinlike immunoreactivity and identified neurosecretory cells as putative substrates for modulation of courtship display behavior in the blue crab, callinectes sapidus. | pheromonally stimulated courtship display (cd) behavior in male blue crabs (callinectes sapidus) is characterized by rhythmic waving of the fifth legs. the waving of the fifth legs is modulated by proctolin in freely moving crabs and in reduced preparations. to begin to identify an anatomical substrate for cd behavior we have localized putative proctolinergic cells and described the morphology of neurosecretory neurons known to oscillate during pheromonal stimulation of reduced preparations. pro ... | 1996 | 8725299 |
| phylogeny of the haplosporidia (eukaryota: alveolata) based on small subunit ribosomal rna gene sequence. | the phylogenetic position of the phylum haplosporidia was investigated with the complete small subunit rrna gene sequences from 5 species in the phylum: haplosporidium nelsoni and haplosporidium costale, parasites of the eastern oyster crassostrea virginica; haplosporidium louisiana, a parasite of the mudcrab panopeus herbstii; minchinia teredinis, a parasite of shipworms (teredo spp.) and urosporidium crescens, a hyperparasite found in metacercariae of the trematode megalophallus sp. in the blu ... | 1996 | 8691370 |
| atrial natriuretic peptide gene expression within invertebrate hearts. | the present investigation was designed to (1) determine if atrial natriuretic factor gene expression occurs within invertebrates as well as within vertebrates; (2) determine whether the product of this gene expression is the 126-amino-acid atrial natriuretic factor prohormone or some other molecular species; and (3) evaluate within the same invertebrates if the products of atrial natriuretic factor gene expression are released into their circulation. utilizing a very sensitive rnase protection a ... | 1995 | 8575660 |
| isolation of antho-rfamide related peptides from the eyestalks of blue crab. | 1. two carboxyl-terminally amidated peptides (cp1 and cp2) were isolated from the blue crab (callinectes sapidus) eyestalks by a method of carboxyl-terminal analysis. 2. the peptides were sequenced as pglu-gly-arg-phe-amide (cp1) and pglu-leu-gly-arg-phe-amide (cp2). 3. each carboxyl-terminus of the peptides was precisely determined by amino acid analysis utilizing phenylisothiocyanate derivatives. 4. cp1 was identical to the sea anemone neuropeptide, antho-rfamide. | 1993 | 8462277 |
| hemocyanin synthesis in the blue crab callinectes sapidus. | 1. the synthesis of hemocyanin in the blue crab, callinectes sapidus, was investigated by molecular techniques. 2. polyadenylated mrna was prepared from the hepatopancreas and translated in rabbit reticulocyte lysate. 3. translation products were immunoprecipitated with immobilized antihemocyanin igg. analysis of the igg-bound polypeptides by sodium dodecyl sulfate-polyacrylamide gel electrophoresis showed two polypeptides comigrating with authentic callinectes hemocyanin. 4. a synthetic degener ... | 1993 | 8448995 |
| depolarization-activated potentiation of the t fiber synapse in the blue crab. | the blue crab t fiber synapse, associated with the stretch receptor of the swimming leg, has a nonspiking presynaptic element that mediates tonic transmission. this synapse was isolated and a voltage clamp circuit was used to control the membrane potential at the release sites. the dependence of transmitter release on extracellular calcium, [ca]o, was studied over a range of 2.5-40 mm. a power relationship of 2.7 was obtained between excitatory postsynaptic potential (epsp) rate of rise and [ca] ... | 1993 | 8382259 |
| a putative glutathione-binding site in cdzn-metallothionein identified by equilibrium binding and molecular-modelling studies. | glutathione (gsh) has been found to form a complex with both vertebrate and invertebrate copper-metallothionein (cumt) [freedman, ciriolo and peisach (1989) j. biol. chem. 264, 5598-5605; brouwer and brouwer-hoexum (1991) arch. biochem. biophys. 290, 207-213]. in this paper we report on the interaction of gsh with cdznmt-i and cdznmt-ii from rabbit liver and with cdmt-i from blue crab hepatopancreas. ultrafiltration experiments showed that all three mts combined with gsh. the measured binding da ... | 1993 | 8363576 |
| hemolymph lectins of the blue crab, callinectes sapidus, recognize selected serotypes of its pathogen vibrio parahaemolyticus. | 1994 | 8192339 | |
| induction of metallothionein mrna in the blue crab (callinectes sapidus) after treatment with cadmium. | 1. dietary treatment of blue crabs with cadmium led to an increase of cadmium metallothionein in the hepatopancreas. 2. utilizing a unique purification procedure, poly a+ rna was isolated from the hepatopancreas of control and cadmium-treated blue crabs with 260/280 nm ratios of 2.0 or better. 3. poly a+ rna was hybridized with a series of oligonucleotide probes derived from a portion of the amino acid sequence of lobster metallothionein. a single band of approx. 300 base pairs was present in co ... | 1993 | 8098685 |
| molecular cloning of two pigment-dispersing hormone (pdh) precursors in the blue crab callinectes sapidus reveals a novel member of the pdh neuropeptide family. | a cdna library was established from the eyestalk ganglia of the blue crab callinectes sapidus. screening resulted in the isolation of a clone (497 bp excluding poly(a) tail) which encodes a beta-pdh previously found in several crustacean species. it displays high sequence similarity with a clone isolated from an eyestalk cdna library of the shore crab carcinus maenas, indicating the close phylogenetic relationship of both species. a second clone (414 bp exclusive of the poly(a) tail) encodes a n ... | 1994 | 7999056 |
| subunit composition of hemocyanins of callinectes sapidus: phenotypes from naturally hypoxic waters and isolated oligomers. | the electrophoretic banding pattern of hemocyanin monomers in blue crabs caught in natural waters indicate that the phenotypes associated with normoxia or hypoxia in the laboratory can also be found in those conditions in nature. page of pure fractions of 1 x 6-mers isolated by hplc revealed only the two invariant plus one slightly variable band. in contrast, the 2 x 6-mer fraction contained those three plus the three highly variable bands. these results support the hypothesis formulated by earl ... | 1994 | 7953073 |
| evaluation of lactic acid bacterium fermentation products and food-grade chemicals to control listeria monocytogenes in blue crab (callinectes sapidus) meat. | fresh blue crab (callinectes sapidus) meat was obtained from retail markets in florida and sampled for viable listeria monocytogenes. the pathogen was found in crabmeat in three of four different lots tested by enrichment and at levels of 75 cfu/g in one of the same four lots by direct plating. next, crabmeat was steam sterilized, inoculated with a three-strain mixture of l. monocytogenes (ca. 5.5 log10 cfu/g), washed with various lactic acid bacterium fermentation products (2,000 to 20,000 arbi ... | 1994 | 7944362 |
| distribution and characterization of angiotensin-converting enzyme-like activity in tissues of the blue crab callinectes sapidus. | angiotensin-converting enzyme-like activity (acela) was determined in tissue homogenates of the blue crab, callinectes sapidus, using the synthetic substrate hippuryl-histidyl-leucine (hip-his-leu) and the specific inhibitor, captopril. acela was highest in gill homogenates followed by the hepatopancreas and hemolymph with specific activities of 1.69, 0.37 and 0.10 nmol/min/mg protein, respectively. gill enzyme activity was membrane-associated and no difference in activity was noted between ante ... | 1994 | 7915656 |
| three-dimensional solution structure of callinectes sapidus metallothionein-1 determined by homonuclear and heteronuclear magnetic resonance spectroscopy. | metallothionein is a cysteine-rich metal-binding protein whose biosynthesis is closely regulated by the level of exposure of an organism to zinc, copper, cadmium, and other metal salts. the metallothionein from callinectes sapidus is known to bind six divalent metal ions in two separate metal-binding clusters. heteronuclear 1h-113cd and homonuclear 1h-1h nmr correlation experiments have been used to establish that the two clusters reside in two distinct protein domains. the three-dimensional sol ... | 1995 | 7819257 |
| enterotoxigenic escherichia coli and staphylococcus aureus in fish and seafood from the southern region of brazil. | an investigation to evaluate the microbiological condition and safety of fish and seafood commonly harvested at the coast of santa catarina state and sold in florianópolis was undertaken. one hundred and seventy-five samples of fish and fish fillets (cynoscion leiarchus), shrimp tails (peneaus paulensis), shellfish-meat (anomalocardia brasiliensis and metilus edulis), and crab-meat (callinectes sapidus) were collected from markets and examined within 4 h of purchase. for isolation and enumeratio ... | 1994 | 7703011 |
| neuromodulation of rhythmic motor patterns in the blue crab callinectes sapidus by amines and the peptide proctolin. | the blue crab callinectes sapidus, provides an opportunity to study neuromodulation of three variations of rhythmic behavior produced by the same appendages. these behaviors are sideways swimming, backward swimming and courtship display (cd). each behavior has a different context, and despite similarities among them, each is quantifiably distinguishable. cd behavior occurs in males, is stimulated naturally by pheromone, and elements of the behavior are evoked by proctolin and dopamine. sideways ... | 1995 | 7643322 |
| modulation of behavior by biogenic amines and peptides in the blue crab, callinectes sapidus. | using the blue crab callinectes sapidus as a model system, we have investigated the effects of potential neuromodulators on freely behaving animals. of interest is the modulatory effect of a number of drugs on three rhythmic behaviors of the blue crab: courtship display (cd) of the male crab, sideways swimming and backward swimming. the drugs tested were proctolin, dopamine, octopamine, serotonin, and norepinephrine. injection of each drug elicited a unique posture or combination of limb movemen ... | 1995 | 7643321 |
| coordination and neuromuscular control of rhythmic behaviors in the blue crab, callinectes sapidus. | the stereotypical courtship display (cd) behavior of the male blue crab, callinectes sapidus, includes an unusual component: the rhythmic waving of the swimming appendages above the carapace. this behavior occurs in a unique context but it resembles two other rhythmic behaviors performed using the swimming legs: sideways swimming and backward swimming. as a first step to understanding the mechanisms that allow the expression of apparently different rhythmic motor patterns, we have examined these ... | 1995 | 7643320 |
| a highly conserved red pigment-concentrating hormone precursor in the blue crab callinectes sapidus. | a cdna library was established from the eyestalk ganglia of the blue crab callinectes sapidus. one clone was isolated (644 bp excluding the poly(a) tail) which encodes the red pigment-concentrating hormone (rpch)-precursor, consisting of the 25 amino acid residue signal peptide, the rpch, and a 73 amino acid residue rpch-precursor related peptide. this clone displays high sequence similarity with a clone isolated from an eyestalk cdna library of the shore crab carcinus maenas, in accordance with ... | 1995 | 7611999 |
| molecular cloning of a cdna encoding putative molt-inhibiting hormone from the blue crab, callinectes sapidus. | a cdna library was constructed using poly(a+) rna isolated from eyestalk neural ganglia of the blue crab, callinectes sapidus. the library was screened using a probe generated by pcr based on the published amino acid sequence of molt-inhibiting hormone from the shore crab, carcinus maenas. dna sequence analysis of one positive clone revealed a 339 bp open reading frame encoding a 78-residue putative molt-inhibiting hormone and a 35-residue signal peptide. the deduced amino acid sequence of c. sa ... | 1995 | 7537497 |
| primary structure and tissue-specific expression of blue crab (callinectes sapidus) metallothionein isoforms. | in aquatic animals, synthesis of the metal-binding protein metallothionein (mt) can be induced through exposure to elevated levels of metals in food or water. whether the different routes of exposure lead to expression of different metallothionein isoforms in different tissues in unknown. in this study we examined the induction of metallothionein isoforms in the hepatopancreas and gills of the blue crab callinectes sapidus. when blue crabs are exposed to cadmium in their diet, the metal accumula ... | 1995 | 7487904 |
| amiloride-sensitive ammonium and sodium ion transport in the blue crab. | in the estuarine crab, callinectes sapidus, net nh4+ efflux was twice as high in animals acclimated to 17% salinity seawater (sw) (0.495 +/- 0.084 mumol . h-1 . g wet wt-1, n = 7) than in animals acclimated to full-strength 35% sw (0.212 +/- 0.028 mumol . h-1 . g-1, n = 7). amiloride (3 x 10(-4) m) in the external sw reversibly inhibited these effluxes by 63 +/- 6% (n = 6) and 67 +/- 6% (n = 5), respectively. unidirectional na+ influx was reversibly inhibited 42 +/- 6% (n = 7) by amiloride in 17 ... | 1981 | 7304782 |
| effect of the amino acid histidine on the uptake of cadmium from the digestive system of the blue crab, callinectes sapidus. | 1981 | 7296034 | |
| toxicity of ozonated estuarine water to juvenile blue crabs (callinectes sapidus) and juvenile atlantic menhaden (brevoortia tyrannus). | 1981 | 7248539 | |
| subunit structure and dissociation of callinectes sapidus hemocyanin. | the hemocyanin of the blue crab, callinectes sapidus has two major components sedimenting with approximate sedimentation coefficients of 17 s and 25 s. molecular weight data based on light scattering and sedimentation equilibrium measurements at ph 7.8 suggest that the two components have molecular weights of approximately 450 000 and 900 000 in the presence of stabilizing ca2+. in the absence of ca2+, the molecular weights are found to be about 5% lower, suggesting some dissociation of the hemo ... | 1981 | 7213799 |
| diurnal changes in compound eye fine structure in the blue crab callinectes. 1. differences between noon and midnight retinas on an ld 11:13 cycle. | 1982 | 7200529 | |
| cadmium-binding proteins from blue crabs (callinectes sapidus) environmentally exposed to cadmium. | 1982 | 7106072 | |
| incidence of vibrio species associated with blue crabs (callinectes sapidus) collected from galveston bay, texas. | bacteria were readily isolated from the hemolymph of a majority (88%) of the blue crabs collected from galveston bay, texas. the hemolymph of most crabs contained moderate (greater than 10(3) bacteria/ml) to heavy (greater than (10(5) bacteria/ml) infections. large variances were observed in the bacterial number associated with individual crabs, but no significant difference was observed between the mean bacterial levels in the hemolymph of crabs collected during different seasons of the samplin ... | 1982 | 7103475 |
| heavy metal ion interactions with callinectes sapidus hemocyanin: structural and functional changes induced by a variety of heavy metal ions. | hemocyanins are oligomeric proteins that reversibly bind oxygen. the oxygen binding site is a binuclear copper center bound to the protein by amino acid side chains. the hemocyanin of the blue crab, callinectes sapidus, occurs in vivo as a mixture of 25s dodecamers and 16s hexamers, whose oxygen binding properties are identical. four heavy metals have been used as probes of structure and function in this hemocyanin system. divalent cations of cadmium, copper, mercury, and zinc induced an indefin ... | 1982 | 7093201 |
| specificity for tail fibers of a humoral crab factor neutralizing t2 bacteriophage. | it is now becoming clear that invertebrates, animals lacking the ability to make humoral antibodies, are capable of recognizing self from non-self. in several instances this recognition is manifest in normal ("unimmunized") animals by a rapid clearance of certain foreign materials from the circulation one example of such a rapid innate reaction involves the clearance of t2 bacteriophage from the blue crab (1). other studies have indicated that blue crab plasma contained a factor capable of neutr ... | 1982 | 7067888 |
| the intracellular partitioning of trace metals in marine shellfish. | marine organisms have evolved a number of metabolic strategies to deal with potentially toxic trace metals. to determine how "detoxification" mechanisms such as metal-binding proteins and concretions are involved in the intracellular partitioning of trace metals in marine shellfish, the oyster, crassostrea virginica, and the blue crab, callincetes sapidus, were exposed to controlled levels of trace metals. oysters accumulated cadmium readily and produced specific low molecular weight, cadmium-bi ... | 1983 | 6879150 |
| total lipid and cholesterol content in the blue crab, callinectes sapidus rathbun. | total lipid and cholesterol concentrations in hepatopancreas, gonad and muscle were analyzed for 70 blue crabs. the concentrations were highest in hepatopancreas, then gonad, and muscle was the lowest. in male crabs, the concentrations decreased from the immature stage (feeding and growth stage) to the mature stage (breeding stage), and from august to september (breeding period) in mature males. in female crabs, the concentrations were comparatively high for peelers (pre-molting stage) and matur ... | 1984 | 6744830 |
| recognition of xenogeneic proteins by the blue crab: dissociation of the clearance and degradation reactions and lack of involvement of circulating hemocytes and humoral factors. | blue crabs clear foreign proteins from the circulation to the gills in a manner that can be explained by postulating the participation of a finite number of naturally occurring quasi-specific receptors. the rate of this clearance reaction is not increased by previous exposure to the foreign protein although recovery to the normal rate of clearance after high level blockade is quite rapid. the cleared foreign proteins are degraded in the gills in a relatively nonspecific fashion suggestive of a c ... | 1984 | 6724091 |
| metal ion interactions with limulus polyphemus and callinectes sapidus hemocyanins: stoichiometry and structural and functional consequences of calcium(ii), cadmium(ii), zinc(ii), and mercury(ii) binding. | hemocyanins are oligomeric metalloproteins containing binuclear copper centers that reversibly combine with oxygen molecules. the structural stability and functional properties of these proteins are modified by divalent cations. equilibrium dialysis was used to study the reversible interaction of callinectes sapidus and limulus polyphemus hemocyanins with the divalent cations calcium, cadmium, zinc, copper, and mercury. the number of binding sites and association constants for each cation were o ... | 1983 | 6626526 |
| acid-base regulation during exercise and recovery in the blue crab, callinectes sapidus. | during swimming activity callinectes sapidus incurred a severe hemolymph acidosis due to elevated levels of pco2 and lactate. although hemolymph lactate concentration rose steadily during 1 h of exercise, hemolymph ph was maximally depressed within the first 15 min. a discrepancy between the quantities of lactate and h+ released from the tissues into the hemolymph is explained by a large apparent efflux of h+ into the ambient seawater, presumably via a branchial ion exchange process. ammonia exc ... | 1984 | 6528111 |
| organochlorine residues in shellfish from maryland waters, 1976-1980. | shellfish samples, including the american oyster (craessostrea virginica), the soft shell clam (mya arenaria), the hard shell clam (mercenaria mercenaria) and the blue crab (callinectes sapidus), were taken from the maryland section of the chesapeake bay and its tributaries over a five year period (1976-80) and analyzed to determine residue levels of various organochlorine pesticides. qualitative and quantitative information was obtained for a variety of polychlorinated hydrocarbons. the purpose ... | 1984 | 6501793 |
| trace metal residues in shellfish from maryland waters, 1976-1980. | levels of seven heavy metal residues, arsenic, cadmium, chromium, copper, lead, mercury and zinc were monitored in samples of the american oyster (crassostrea virginica), the soft shell clam (mya arenaria), the hard shell clam (mercinaria mercinaria) and the blue crab (callinectes sapidus). samples were taken from the maryland section of the chesapeake bay and its tributaries over a five year period (1976-80). this study was undertaken to provide an estimate of a baseline for values of trace hea ... | 1984 | 6501792 |
| concentration of rotavirus and enteroviruses from blue crabs (callinectes sapidus). | a simple method for concentration and detection of rotavirus and enteroviruses in the blue crab is described. virus was separated from tissue homogenates at ph 9.5, concentrated by adsorption to protein precipitates at ph 3.5, and recovered by elution of precipitates at ph 9.2. test samples of 12 to 15 ml were produced from an initial 100 g of crab tissues. cat-floc precipitation was used to remove sample toxicity for cell cultures. recovery effectiveness averaged 52% with poliovirus 1, echoviru ... | 1983 | 6318667 |
| uptake and survival of enteric viruses in the blue crab, callinectes sapidus. | uptake of poliovirus 1 by the blue crab, callinectes sapidus, was measured to assess the likelihood of contamination by human enteric viruses. virus was found in all parts of the crab within 2 h after the crab was placed in contaminated artificial seawater. the highest concentrations of virus were found in the hemolymph and digestive tract, but the meat also contained virus. the concentration of virus in the crabs was generally less than in the surrounding water. changes in salinity did not subs ... | 1981 | 6261683 |
| microsomal cytochromes p-450 from marine crabs. | cytochromes p-450 were isolated from the hepatopancreas of several species of crabs (libinia emarginata, callinectes sapidus, menippe mercenaria and uca minax). elution profiles from an ion exchange column showed similar profiles for all species, indicating one broad cytochrome p-450 peak eluting at 0.2 m k cl. hydroxyapatite chromatography resolved the p-450 into three forms (cytochromes p-450i, p-450ii and p-450iii). the forms of cytochrome p-450 in the different crabs were compared with respe ... | 1984 | 6149863 |
| salinity adaptation of hco3--dependent atpase activity in the gills of blue crab (callinectes sapidus). | a bicarbonate-dependent atpase (ec 3.6.1.3) was found in microsomal preparations from blue crab gills. when the crabs were transferred to low salinity (200 mosmolal) from seawater (1000 mosmolal), the hco3- dependent atpase increased in all gill pairs, reaching its new steady state in 2 weeks. the greatest increase occurred in the sixth and seventh gill pairs (approx. 2.5-fold). maximal enzyme activity was observed at an mg2+ concentration of 2 mm and an optimal ph of 7.8. the apparent ka for hc ... | 1982 | 6125214 |
| calcium and the tonic release of transmitter at a non-impulsive synapse in the crab. | depolarization-transmitter release coupling was studied in the promotor stretch receptor/motoneuron synapse of the crab. callinectes sapidus, a preparation in which presynaptic action potentials do not occur. intracellular microelectrode recordings were made from the presynaptic terminal and from the somata of postsynaptic motoneurons while injecting current pulses into the peripheral stretch receptor dendrite with the aid of the sucrose-gap. 1. for short current pulses, the relationship between ... | 1980 | 6109020 |
| shell disease of the blue crab, callinectes sapidus. | 1967 | 6070691 | |
| effect of single and continuous exposures of gamma radiation on the survival and growth of the blue crab, callinectes sapidus. | 1967 | 6066585 | |
| the glucuronic acid pathway in the blue crab, callinectes sapidus rathbun: the enzymes of the udpglucose to glucuronic acid portion of the pathway. | 1967 | 6035559 | |
| free amino acids in developing stages of two crabs, callinectes sapidus rathbun and rhithropanopeus harrisii (gould). | 1966 | 6013506 | |
| ultrastructural studies of sperm morphology and sperm-egg interaction in the decapod callinectes sapidus. | 1966 | 5948806 | |
| a disease of blue crabs (callinectes sapidus) in maryland and virginia. | 1966 | 5939400 | |
| the hemolymph proteins of the blue crab, callinectes sapidus. i. hemocyanins and certain other major protein constituents. | 1969 | 5788602 | |
| vibrio parahaemolyticus from the blue crab callinectes sapidus in chesapeake bay. | strains of vibrio parahaemolyticus, the etiologic agent of "shirasu" food poisoning in japan, were isolated from moribund blue crabs callinectes sapidus and identified by biochemical and serological techniques. | 1969 | 5770620 |
| volume control by muscle fibers of the blue crab. volume readjustment in hypotonic salines. | single isolated muscle fibers from the walking legs of the blue crab, callinectes sapidus act as boyle-van't hoff osmometers with an osmotically inactive volume of 33 %. fibers in hypotonic salines undergo a spontaneous volume readjustment toward the initial volumes of the cells found in isotonic salines. the volume readjustment is initiated by the increase in cell volume in hypotonic salines and appears to be dependent on the duration of exposure of the fiber to external sodium, the sodium conc ... | 1969 | 5767335 |
| conversion of progesterone to 11-deoxycorticosterone by the androgenic gland of the blue crab (callinectes sapidus rathbun). | 1969 | 5765442 | |
| steroidogenesis in the blue crab callinectes sapidus rathbun. | 1971 | 5559128 | |
| ultrastructural study of the neurosecretory granules in the sinus gland of the blue crab, callinectes sapidus. | 1971 | 5543303 | |
| electrical properties of axons of callinectes sapidus. | 1970 | 5459481 | |
| biological relationship of callinectes sapidus (rathbun) with carcinonemerteans, bryozoan, and barnacles. | 1970 | 5412351 | |
| sterols, fatty acids and sterol content in eggs and hepatopancreas of the blue crab callinectes sapidus (rathbun). | 1969 | 5372851 | |
| [comparative study of the ultrastructure of androgenic glands from normal and eyestalkless crabs during larval life or after puberty in the species: rhithropanopeus harrisii (gould) and callinectes sapidus rathbun]. | 1971 | 5157128 | |
| ultrastructural study of microsporidian development. i. nosema sp. sprague, 1965 in callinectes sapidus rathbun. | 1970 | 4986525 | |
| the hemolymph proteins of the blue crab, callinectes sapidus. ii. a lipoprotein serologically identical to oocyte lipovitellin. | 1969 | 4978665 | |
| the glycogen phosphorylase system from the muscle of the blue crab: callinectes danae. | 1969 | 4977724 | |
| [research on the role of neurosecretion in sex differentiation in the crab, callinectes sapidus rathbun]. | 1967 | 4963852 | |
| isolation of vibrio parahaemolyticus from the processed meat of chesapeake bay blue crabs. | a method for the recovery of vibrio parahaemolyticus from seafoods is described. by this procedure, a total of 56 biochemically positive cultures of v. parahaemolyticus were recovered from market samples of chesapeake bay processed blue crab (cooked, picked, packed, and refrigerated meat). all of the isolates were tested serologically, and 22 strains were serotyped according to the schema of sakazaki as follows: k3, k5, k28, k31, k36, k37, k39, k43, and k44. these results indicate the broad dist ... | 1970 | 4921056 |
| the salt absorbing cells in the gills of the blue crab (callinectes sapidus rathbun) with notes on modified mitochondria. | 1968 | 4884645 | |
| calcium phosphate granules in the hepatopancreas of the blue crab callinectes sapidus. | the hepatopancreas of the adult male blue crab callinectes sapidus in intermolt was found to contain substantial amounts of calcium, magnesium, and inorganic phosphorus, averaging about 260, 20, and 250 microg-atoms per g wet tissue, respectively, accounting for over 10% of the tissue dry weight. electron microscopy of the intact tissue showed three qualitatively different granular structures having electron densities suggestive of high mineral content. after fractionation of the tissue using ce ... | 1974 | 4827907 |
| biochemical and ultrastructural aspects of ca2+ transport by mitochondria of the hepatopancreas of the blue crab callinectes sapidus. | mitochondria isolated from the hepatopancreas of the blue crab callinectes sapidus show up to 12-fold stimulation of respiration on addition of ca(2+), which is accompanied by ca(2+) accumulation (ca(2+):site = 1.9) and h(+) ejection (h(+):ca(2+) = 0.85). sr(2+) and mn(2+) are also accumulated; mg(2+) is not. a strongly hypertonic medium (383 mosm), mg(2+), and phosphate are required for maximal ca(2+) uptake. ca(2+) uptake takes precedence over oxidative phosphorylation of adp for respiratory e ... | 1974 | 4827906 |
| amino-acid metabolism during osmotic stress in isolated axons of callinectes sapidus. | 1974 | 4823634 | |
| chitinoclastic bacteria associated with shell disease in penaeus shrimp and the blue crab (callinectes sapidus). | 1973 | 4701183 | |
| an attempt to immunize the blue crab, callinectes sapidus, with vertebrate red blood cells. | 1973 | 4692770 | |
| enzymatic mechanisms during temperature acclimation of the blue crab, callinectes sapidus. ii. kinetic and thermodynamic studies of glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase. | 1972 | 4644213 | |
| enzymatic mechanisms during temperature acclimation of the blue crab, callinectes sapidus. i. oxygen consumption and activity of glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase. | 1972 | 4644212 | |
| evoked activity in the nervous system of callinectes sapidus following phasic excitation of the statocysts. | 1972 | 4638898 | |
| incidence of clostridium botulinum in crabmeat from the blue crab. | the incidence of clostridium botulinum in fresh crabmeat of blue crab was six out of 986 samples; in pasteurized crabmeat one sample out of 1,000 contained the organism. | 1974 | 4607823 |
| survival studies with spores of clostridium botulinum type e in pasteurized meat of the blue crab callinectes sapidus. | clostridium botulinum type e studies reported in this paper include the incidence of the organism in selected chesapeake bay areas, growth and toxin production in crabmeat homogenates, and the effect of pasteurization upon varying levels of spores in crabmeat. type e spores were detected in 21 of 24 bottom mud samples taken at locations from which blue crabs were being harvested. sterilized crabmeat homogenates inoculated with as little as five spores per 10 g became toxic after 8 days at 50 f, ... | 1974 | 4596746 |
| bacteriological survey of the blue crab industry. | during sanitation inspections of 46 crabmeat processing plants on the atlantic and gulf coasts, 487 samples of whole crabs immediately after cooking, cooked crabs after cooling, backed or washed (or both) crab bodies and whole crab claws, as well as 1,506 retail units of finished product were collected and analyzed bacteriologically. the 1,506 retail units (1-lb [373.24-g] cans) included 518 cans of regular (special) meat, 487 cans of claw meat, and 501 cans of lump meat. statistical analyses sh ... | 1972 | 4568256 |
| accumulation of mirex-14c in the adult blue crab (callinectes sapidus). | 1974 | 4433859 | |
| co binding by hemocyanins of limulus polyphemus, busycon carica, and callinectes sapidus. | 1974 | 4429663 | |
| rhodopsin of the blue crab callinectes: evidence for absorption differences in vitro and in vivo. | 1974 | 4423024 | |
| kinetics of glycogen phosphorylase a from the muscle of the blue crab, callinectes danae. | 1974 | 4414042 | |
| isosmotic intracellular regulation and redox changes in the respiratory chain components of callinectes sapidus isolated muscle fibers. | 1972 | 4348290 | |
| molt cycle regulation of nucleotide pyrophosphatase in the hepatopancreas of the blue crab, callinectes sapidus rathbun. | 1969 | 4304992 | |
| respiration and phosphorylation by mitochondria from the hepatopancreas of the blue crab (callinectes sapidus). | 1973 | 4266066 | |
| purification and properties of glycogen phosphorylase a from the muscle of the blue crab, callinectes danae. | 1974 | 4213332 | |
| the effect of salinity and sex on the respiration rates of excised gills of the blue crab, callinectes sapidus. | 1974 | 4156238 | |
| variations in serum constituents of the blue crab, callinectes sapidus: major cations. | 1974 | 4154178 | |
| the effect of salinity and temperature on the ion levels in the hemolymph of the blue crab, callinectes sapidus, rathbun. | 1974 | 4153717 | |
| the effect of external salinity upon lipid synthesis in the blue crab callinectes sapidus rathbun and in the spider crab libinia emarginata leech. | 1974 | 4153714 | |
| the structure of the stomatogastric neuromuscular system in callinectes sapidus, homarus americanus and panulirus argus (decapoda crustacea). | 1974 | 4152406 | |
| potentiometric evidence for the active transport of sodium and chloride across excised gills of callinectes sapidus. | 1971 | 4150220 | |
| bicarbonate-chloride exchange in gill plasma membranes of blue crab. | the uptake of chloride was studied in gill plasma membrane vesicles from low-salinity-adapted blue crabs (callinectes sapidus). cl- uptake was not na+ dependent. however, when a hco-3 gradient (in greater than out) was imposed across the membrane, a transient overshoot of about 2.5-fold was produced. approximately 90% of the cl- uptake reflected entry into the osmotically active intravesicular space. cl- itself, nitrate, hydroxyl, and sulfite could substitute for hco-3. the hco-3/cl- exchange pr ... | 1985 | 4061678 |
| incidence of bacteremia in stressed and unstressed populations of the blue crab, callinectes sapidus. | the incidence of bacteremia in the blue crab, callinectes sapidus, is reported to be in excess of 80%. because these results have been controversial, a field study was initiated to determine the effect of commercial capture and handling stresses on the incidence and levels of infection in blue crabs. the majority (75%) of "unstressed" crabs which were captured individually and bled immediately upon removal from the water were bacteremic, with a geometric mean level of infection of 14 cfu/ml of h ... | 1985 | 4051486 |
| source of vibrio spp. found in the hemolymph of the blue crab, callinectes sapidus. | 1985 | 4031533 | |
| heterogeneous humoral and hemocyte-associated lectins with n-acylaminosugar specificities from the blue crab, callinectes sapidus rathbun. | callinectes sapidus serum and hemocyte microsomal fraction agglutinated a panel of untreated and enzyme treated vertebrate erythrocytes and cultured lymphoid cell lines. crossed absorption experiments suggested the presence of multiple specific lectins in the serum. the microsomal fraction showed a 35-fold increase in specific activity when compared to the hemocyte lysate suggesting that hemocyte lectins are membrane-associated. agglutination by serum and hemocyte lectins was inhibited by low co ... | 1986 | 3769455 |
| colonization of the gut of the blue crab (callinectes sapidus) by vibrio cholerae. | attachment of vibrio cholerae to the mucosal surface of the intestine is considered to be an important virulence characteristic. vibrio cholerae, an autochthonous member of brackish water and estuarine bacterial communities, also attaches to crustacea, a significant factor in multiplication and survival of v. cholerae in nature. the ability of v. cholerae to attach to the gut wall of the blue crab (callinectes sapidus) was examined, and attachment was observed only in the hindgut and not the mid ... | 1986 | 3767362 |
| the uptake and in vivo metabolism of the organophosphate insecticide fenitrothion by the blue crab, callinectes sapidus. | callinectes were exposed to [14c]fenitrothion at a level of 5.2 micrograms/liter in either 22 degrees c, 34 ppt; 22 degrees c, 17 ppt; or 17 degrees c, 34 ppt seawater. uptake from the water, as measured by a decrease in fenitrothion, and the distribution of radioactivity throughout the callinectes were determined. the nature of radiolabeled metabolites in the water and hepatopancreas was also determined. fenitrothion was absorbed more rapidly from the water at the higher salinity and temperatur ... | 1986 | 3764904 |
| responses to reversed nh3 and nh4+ gradients in a teleost (ictalurus punctatus), an elasmobranch (raja erinacea), and a crustacean (callinectes sapidus):evidence for nh4+/h+ exchange in the teleost and the elasmobranch. | ammonia excretion rates of channel catfish, ictalurus punctatus, little skate (raja erinacea), and blue crab (callinectes sapidus) were measured in experimental regimes which permitted simultaneous assessment of the partial pressure gradients for nonionized nh3 and the chemical concentration gradients of nh4+. under conditions of low external ammonia, the average ammonia excretion was +295 microm kg-1 h-1 for catfish, +149 microm kg-1 h-1 for blue crabs, and +59 microm kg-1 h1 for skates with pa ... | 1986 | 3746231 |
| total mercury and its distribution in blue crab and deep water pink shrimp from alexandria coast. | total mercury content and its distribution in muscles and viscera of male and female blue crab (callinectes sapidus rothbum) and deep water pink shrimp (parapenacus longirostris) collected from the 3 main fishing grounds near the alexandria coast in the mediterranean sea was estimated. the results indicate that the mercury content in the muscles of both species differ according to fishing areas, size, sex, and species. more than 75% of total mercury were accumulated in the viscera of both specie ... | 1987 | 3696196 |
| nutritional availability to rats of selenium in four seafoods: crab (callinectes sapidus), oyster (crassostrea virginica), shrimp (penaeus duorarum) and baltic herring (clupea harengus). | 1. the present study was conducted to determine the biological availability to rats of the selenium in four high-se seafoods: crab (callinectes sapidus), oyster (crassostrea virginica), shrimp (penaeus duorarum) and baltic herring (clupea harengus). 2. weanling male rats were fed on a se-deficient torula yeast diet for 4 weeks followed by either continued depletion or repletion for 4 weeks with 0.05, 0.1 or 0.2 microgram se as selenite/g, or 0.1 or 0.2 microgram se as freeze-dried cooked test fo ... | 1986 | 3676154 |