| the effect of different zooxanthellae on the growth of experimentally reinfected hosts. | 1. a method is given enabling the differential effects of different strains of zooxanthellae on host growth to be assessed. this technique uses the increase in the number of tentacles as the measure of growth. 2. aposymbiotic polyps of the anemone aiptasia pulchella reinfected with strains of symbiodinium microadriaticum isolated from the anemone aiptasia pulchella and the scyphozoan cassiopea xamachana grow as well as normal aiptasia polyps. 3. aposymbiotic aiptasia polyps reinfected with zooxa ... | 1979 | 36925 |
| anti-carbohydrate precipitins and haemagglutinins in haemolymph from tridacna maxima (röding). | haemolymph from the elongate clam, tridacna maxima (röding) readily precipitates with h-blood group substances, pneumococcus type xiv polysaccharide, human milk and salivas, and with a number of polysaccharides which contain the o-ss-d-galactopyranosyl-(1-6)-d-galactose structure. precipitation has been demonstrated using both gel diffusion and quantitative precipitin methods. t. maxima haemolymph strongly agglutinates human erythrocytes and haemagglutination can be inhibited by the same prepara ... | 1975 | 129978 |
| quantitative precipitin studies on the specificity of an extract from tridacna maxima (röding). | haemolymph from the clam tridacna maxima precipitated with purified h-blood-group substances, helix pomatia galactogen, and pneumococcus type xiv polysaccharide. although gel diffusion, gel electrophoresis, and inhibition experiments indicated that only a single precipitating lectin was present in the haemolymph, quantitative precipitin and haemagglutination results suggested that a second agglutinin with anti-h-like specificity was also present. evidence obtained from hapten inhibition experime ... | 1975 | 236090 |
| a new marker for neuraminidase-treated human serum glycoproteins from the haemolymph of tridacna maxima (röding). | highly purified human serum glycoproteins were treated with neuraminidase. the exposed subterminal carbohydrate structures reacted strongly with an anti-galactan precipitin from the haemolymph of tridacna maxima which detects terminal, non-reducing beta-d-galactoside residues. this invertebrate precipitin, tridacnin, may be used as a marker for nearly two thirds of all asialo serum glycoproteins; a number of different cross-reactions with various other polysaccharides and galactans subdivides th ... | 1977 | 402436 |
| demonstration of organ-characteristic glycoproteins in human semen. | tridacnin m, a galactosyl-specific reagent prepared from the bivalve clam tridacna maxima (röding) was used for the demonstration of 2 different glycosubstances with terminal galactosido units in human semen. the results obtained by immunodiffusion tests indicate that the seminal plasma contains a water-soluble glycoprotein with two carbohydrate chains, one of them having a terminal beta-galatosyl group whereas the other one seems to have a terminal n-acetyl-neuraminic acid group and a subtermin ... | 1977 | 407814 |
| additional precipitation reactions of lectins with human serum glycoproteins. | highly purified human serum glycoproteins were treated with neuraminidase and examined for their cross reaction with several lectins with anti-galactosyl specificity: beta-d-galactosyl structures are thought to be the main terminal sugar residues that become attached de novo after removal of neuraminic acid. the following lectins were tested: tridacnin from the bivalve clams tridacna maxima and tridacna gigas, the agglutinin from the sponge axinella polypoides, the lectin from the roach rutilus ... | 1978 | 564939 |
| selective isolation of allergens. i. reaction of house dust mite extracts with tridacnin and concanavalin a and examination of the allergenicity of the isolated components. | tridacnin, a lectin from the clam tridacna maxima was found to precipitate with crude extracts from the house dust mites dermatophagoides farinae and dermatophagoides pteronyssinus. using tridacnin in direct precipitation and affinity chromatography studies, a carbohydrate-rich preparation of high molecular weight was isolated from d. farinae extracts. the isolated preparation gave one precipitin line when used with tridacnin in gel diffusion and immunoelectrophoresis experiments but two bands w ... | 1977 | 589778 |
| purification and characterization of a galactan-reactive agglutinin from the clam tridacna maxima (röding) and a study of its combining site. | 1. a beta-galactosyl-binding lectin was purified from the haemolymph of the clam tridacna maxima by affinity chromatography using polylecyl larch galactan, d-galactosamine coupled to epoxy-activated sepharose or acid-treated sepharose. elution with n-acetyl-d-galactosamine or lactose displaced the bound lectin, which appeared homogeneous by sedimentation analysis. on immunoelectrophoresis at ph8.6 and against rabbit antisera to crude t. maxima haemolymph, the lectin gave one precipitin arc in th ... | 1978 | 743208 |
| purification of tridacnin, a novel anti-beta-(1-6)-digalactobiose precipitin from the haemolymph of tridacna maxima (röding). | | 1975 | 806478 |
| different glycosubstances and galactans in the albumin gland and eggs of achatina fulica. | in saline extracts from the eggs and the albumin gland of the snail achatina fulica 3 different forms of glycosubstances have been found by using heterophile precipitins from different sources: 1. an alkali-stable galactan reacting with the anti-galactans from axinella polypoides sponge and from the clam tridacna maxima (tridacnin) and with concanavalin a. 2. another glycosubstance giving cross-reactions with a second precipitin from axinella polypoides, with the lectin from ricinus communis, wi ... | 1976 | 1034378 |
| differentiation of trypanosoma cruzi chagas, 1909 and trypanosoma vespertilionis battaglia, 1904 by various lectins. | four-days-old culture forms of trypanosoma cruzi (strain téhuantépéc, guatemala) and trypanosoma vespertilionis (strain p-14, p-9) were tested by 19 carbohydrate-specific agglutinins. the t. cruzi strains are interspecifically distinguishable with the lectins from euonymus europaeus, tridacna crocea, tridacna maxima and the human blood-group testserum anti-b from the t. vespertilionis strains. while the t. vespertilionis strains did react with anti-b and e. europaeus, the t. cruzi strains did no ... | 1983 | 6349060 |
| the spatial resolution of the pinhole eyes of giant clams (tridacna maxima). | giant clams (tridacna spp.) have several hundred small pinhole-type eyes on the exposed mantle. they respond by withdrawing the mantle to movements of dark objects, even if these cast no shadow on the animal as a whole. i investigated this 'sight reaction' using black and white square-wave gratings whose phase abruptly changed so that the white areas became dark and vice versa. gratings with periods of 13.5 degrees were ineffective, but gratings of 20.7 degrees caused partial retraction of mantl ... | 2003 | 12590758 |
| morula-like cells in photo-symbiotic clams harboring zooxanthellae. | symbiosis is observed between zooxanthellae, symbiotic dinoflagellates, and giant clams and related clams which belong to the families tridacnidae and cardiidae. we have previously shown that a photo-symbiotic clam tridacna crocea has three types of hemocytes, the eosinophilic granular hemocyte with phagocytic activity, the agranular cell with electron lucent granules, and the morula-like cell with large (ca. 2 mum in diameter) colorless granules. the function of the morula-like cell is not clea ... | 1998 | 18465996 |
| first identification of the neurotoxin homoanatoxin-a from mats of hydrocoleum lyngbyaceum (marine cyanobacterium) possibly linked to giant clam poisoning in new caledonia. | we report the first identification of homoanatoxin-a from benthic marine cyanobacteria (hydrocoleum lyngbyaceum) samples collected in lifou (loyalty islands, new caledonia), where cases of giant clams (tridacna maxima) intoxications were recorded during a severe ciguatera fish poisoning outbreak. homoanatoxin-a was also detected in extracts of giant clams harvested in the surroundings of the contaminated area suggesting the possible link between these poisoning events and the occurrence of poten ... | 2010 | 19895826 |
| how a host cell signalling molecule modifies carbon metabolism in symbionts of the coral plesiastrea versipora. | cnidarian cell signalling remains poorly understood. this study has expanded our knowledge of the cell signalling molecule host release factor (hrf) from the coral plesiastrea versipora. we have now confirmed that hrf is present in coral host cells that lack intracellular algae. previous studies showed that hrf stimulates the release of photosynthetic products (mainly glycerol) from symbiodinium algae, thus providing the host with carbon; glycerol release was accompanied by reduced synthesis of ... | 2013 | 23490026 |
| the isotopic biosignatures of photo- vs. thiotrophic bivalves: are they preserved in fossil shells? | symbiont-bearing and non-symbiotic marine bivalves were used as model organisms to establish biosignatures for the detection of distinctive symbioses in ancient bivalves. for this purpose, the isotopic composition of lipids (δ13c) and bulk organic shell matrix (δ13c, δ34s, δ15n) from shells of several thiotrophic, phototrophic, or non-symbiotic bivalves were compared (phototrophic: fragum fragum, fragum unedo, tridacna maxima; thiotrophic: codakia tigerina, fimbria fimbriata, anodontia sp.; non- ... | 2014 | 25039581 |