| mycetocyte symbiosis in insects. | 1. non-pathogenic microorganisms, known as mycetocyte symbionts, are located in specialized 'mycetocyte' cells of many insects that feed on nutritionally unbalanced or poor diets. the insects include cockroaches, cimicidae and lygaeidae (heteroptera), the homoptera, anoplura, the diptera pupiparia, some formicine ants and many beetles. 2. most mycetocyte symbionts are prokaryotes and a great diversity of forms has been described. none has been cultured in vitro and their taxonomic position is ob ... | 1989 | 2696562 |
| impact of red imported fire ant (hymenoptera: formicidae) predation on horn flies (diptera: muscidae) in a cattle pasture treated with pro-drone. | | 1988 | 3403766 |
| [seasonal occurrence of dicrocoelium dendriticum in intermediate hosts]. | epizootiological questions were studied on a permanent pasture of a farm situated in one of the dicrocoeliasis areas in the gdr during the 1986 grazing season. helicella obvia snails and formica fusca ants were found to be first and second intermediate hosts respectively. a total of 1,121 snails and 70 ants were dissected. the infestation rate with dicrocoelium dendriticum stages in snails decreased in summer after the high spring peak and increased again in autumn. paralysed ants were found onl ... | 1988 | 3415040 |
| karyotypes, c-banding, and chromosomal location of active nucleolar organizing regions in tapinoma (hymenoptera, formicidae). | the haploid and diploid karyotypes of tapinoma erraticum (n = 8) and tapinoma nigerrimum (n = 9) were analyzed using c-banding and observation of nor sites. c-banding showed the existence of heterochromatin in the paracentromeric regions of all chromosomes. the analysis of nor sites in these species proved the existence of primary activity nor in one or two chromosomes, respectively, whereas the other chromosomes showed secondary activity nor, expressed only in a minority of cells. in both speci ... | 1988 | 3417142 |
| [therapy and clinicotoxicologic follow-up of tartar emetic poisoning caused by an ant insecticide in a small child]. | since some years lindane has been replaced by tartar emetic in a sweet tasting liquid against ants, of which a three year old girl drank nearly 50 ml containing 2.3 g tartar emetic. this is a multiple of the lethal dose for children. but this child survived. the course of the intoxication and its therapy are described. the levels of antimony were controlled in blood and urine. | 1987 | 3600675 |
| interaction of erythrocyte protein 4.1 with phospholipids. a monolayer and liposome study. | we have studied the interaction of purified human erythrocyte protein 4.1 with phospholipid membranes by monitoring both the increase in surface pressure of monolayers at the air/water interface and the change in permeability in liposomes to fluorescent molecules, in the presence of protein 4.1. protein 4.1 penetrated into monolayers of brain phosphatidylserine (ps) and egg phosphatidylcholine (pc), even above surface pressures of 30 mn/m. protein 4.1 increased the permeability of negatively cha ... | 1988 | 3337803 |
| a method for the manufacture of single barrel liquid ion-selective microelectrodes: an in situ study of ant venom ph. | a method for the manufacture of single barrel ion-sensitive microelectrodes, employing liquid ion-selective sensors, is described in detail. this method had proven reliable and repeatable for the manufacture of ph-sensitive microelectrodes using a liquid proton carrier. it is believed that this method has advantages over other published methods since it allows direct visualization and control of major steps during electrode fabrication and overcomes several problems often encountered using more ... | 1988 | 3357759 |
| defensive secretion of the tenebrionid beetle, blaps mucronata: physical and chemical determinants of effectiveness. | the primary components of the defensive secretions of blaps mucronata (tenebrionidae) are two quinones (methyl-p-benzoquinone and ethyl-p-benzoquinone) and the hydrocarbon 1-n-tridecene. the hydrocarbon is shown, by comparison with longer- and shorter-chain n-alkanes and 1-n-alkenes, to be optimally suited as carrier of the quinones, and as a surfactant that promotes spread of secretion over the beetle's body following discharge from the gland openings at the abdominal tip. as shown from repelle ... | 1987 | 3668879 |
| [asymmetry of movement direction of myrmica rubra ants during maze learning motivated by food]. | asymmetry in direction of motion was found in myrmica rubra ants at their learning in a symmetrical multi-alternative maze in conditions of "social" alimentary motivation. it was manifested in the form of preferable stay in the right half of the maze and was significant by several parameters: total number of motions, approaches to "false" spots and right turns. unequal degrees of spatial-motor asymmetry (individual and for the whole sample) was revealed by various parameters. most clearly the ri ... | 1986 | 3765838 |
| rate and extent of poly(ethylene glycol)-induced large vesicle fusion monitored by bilayer and internal contents mixing. | poly(ethylene glycol) (peg) of average molecular weight 8000 was used to mediate the fusion of large unilamellar vesicles composed of dipalmitoylphosphatidylcholine. fusion was monitored by fluorescence assays of lipid mixing and aqueous contents mixing. the extent of lipid mixing, as monitored by dphppc fluorescence lifetime, indicated that large unilamellar vesicles underwent a single fusion cycle when incubated with peg and subsequently diluted into buffer. the ants/dpx assays for contents mi ... | 1986 | 3790550 |
| the super-nettles. a dermatologist's guide to ants in the plants. | | 1985 | 3891647 |
| proton-induced fusion of oleic acid-phosphatidylethanolamine liposomes. | liposomes composed of oleic acid and phosphatidylethanolamine (3:7 mole ratio) aggregate, become destabilized, and fuse below ph 6.5 in 150 mm nacl. fusion is monitored by (i) the intermixing of internal aqueous contents of liposomes, utilizing the quenching of aminonaphthalene-3,6,8-trisulfonic acid (ants) by n,n'-p-xylylenebis(pyridinium bromide) (dpx) encapsulated in two separate populations of vesicles, (ii) a resonance energy transfer assay for the dilution of fluorescent phospholipids from ... | 1985 | 4027231 |
| h+- and ca2+-induced fusion and destabilization of liposomes. | a new liposome fusion assay has been developed that monitors the mixing of aqueous contents at neutral and low ph. with this assay we have investigated the ability of h+ to induce membrane destabilization and fusion. the assay involves the fluorophore 1-aminonaphthalene-3,6,8-trisulfonic acid (ants) and its quencher n,n'-p-xylylenebis(pyridinium bromide) (dpx). ants is encapsulated in one population of liposomes and dpx in another, and fusion results in the quenching of ants fluorescence. the re ... | 1985 | 4027232 |
| the human body burden of mirex in the southeastern united states. | mirex is an organochlorine chemical with pesticidal and other industrial usages. biologically, mirex was used as an insecticide for the control of imported fire ants in large areas of the southeastern united states. evidence of mirex exposure in a national survey of chemicals in adipose tissue led to a more intensive survey of the general population in treated counties of the southeastern united states. forty sites were selected randomly from 8 southeastern states where mirex was used widescale ... | 1985 | 4032487 |
| rast-inhibition studies of the imported fire ant solenopsis invicta with whole body extracts and venom preparations. | whole body extracts of imported fire ants (ifawbe) are the only reagents currently available for diagnosis and immunotherapy of patients with anaphylaxis to these hymenoptera. to characterize better ifawbe of the species solenopsis invicta, we evaluated the sera of 29 patients with systemic or large local reactions to imported fire ant (ifa) stings. forty-eight percent (14/29) of these sting-sensitive patients were ifawbe rast positive (greater than or equal to 6% binding of total radioactivity ... | 1988 | 3379222 |
| use of computerized pattern recognition in the study of the cuticular hydrocarbons of imported fire ants. i. introduction and characterization of the cuticular hydrocarbon patterns of solenopsis invicta and s. richteri. | a method is described in which gas chromatographic (gc) data obtained from cuticular hydrocarbons are treated by methods of pattern recognition. based on a recently described sample preparation procedure, gc data are normalized to eliminate slight variations in chromatographic conditions and converted into the proper format for discriminant analysis by computer. the results of several methods of data treatment and display are discussed, based upon the chemometric system package, arthur. the appr ... | 1985 | 4086644 |
| la3+-induced fusion of phosphatidylserine liposomes. close approach, intermembrane intermediates, and the electrostatic surface potential. | the fusion of large unilamellar phosphatidylserine liposomes (ps luv) induced by la3+ has been monitored using the 1-aminoapthalene-3,6,8-trisulfonic acid/p-xylenebis(pyridinium bromide) (ants/dpx) fluorescence assay for the mixing of aqueous contents. the fusion event is extensive and nonleaky, with up to 95% mixing of contents in the fused liposomes. however, addition of excess edta leads to disruption of the fusion products in a way that implies the existence of metastable intermembrane conta ... | 1988 | 3382713 |
| use of computerized pattern recognition in the study of the cuticular hydrocarbons of imported fire ants. ii. comparison of the cuticular hydrocarbon patterns between different colonies of solenopsis richteri. | gas chromatography (gc) data obtained from the cuticular hydrocarbons of the black imported fire ants are treated by methods of pattern recognition. based on a recently described sample preparation procedure, gc data are normalized to eliminate slight variations in chromatographic conditions, and converted to the proper format for discriminant analysis by computer. the results of several methods of data treatment and display are discussed, based on the chemometrics system package, arthur. | 1985 | 4086645 |
| [epizootiological significance of ants in dicrocoeliasis]. | | 1971 | 4256811 |
| n-paraffins from japanese ants. | | 1973 | 4271612 |
| human erythrocyte electrofusion kinetics monitored by aqueous contents mixing. | the kinetics of electrically induced fusion of human erythrocyte ghosts were monitored by the tb/dpa and ants/dpx fluorescence fusion assays. ghosts were aligned by dielectrophoresis using a 3-mhz 350-v/cm alternating field and were fused by single 15- or 50-microseconds electric field pulses of amplitude 2.5-5.0 kv/cm. fusion was detected immediately after the pulse. the peak fluorescence change due to fusion was always obtained within 7 s of pulse application, and was highest for a 5.0 kv/cm 1 ... | 1988 | 3390523 |
| plant bioregulators in the metathoracic glands of myrmicine ants. | | 1970 | 4984686 |
| [egg laying by worker ants, atta laevigata fred. smith 1858 (hym.form.)]. | | 1970 | 4986352 |
| [anatomic and functional study of a new receptor structure in relation with antenna in ants]. | | 1970 | 4988825 |
| [social relations among ants of the genus aphaenogaster]. | | 1969 | 4989961 |
| [studies on biology of parasitic ants. aggressive behavior of workers of chalepoxenus]. | | 1970 | 4991040 |
| [studies on biology of parasitic ants. relations of workers of chalepoxenus with their hosts]. | | 1970 | 4991294 |
| [visual fields of the central ommatidia in the compound eye of apis mellifica and cataglyphis bicolor (apidae, formicidae; hymenoptera)]. | | 1972 | 5021012 |
| [photoperiodic reactions in ants of the genus myramica (hymenoptera, formicidae)]. | | 1972 | 5083489 |
| the presence of protease activity in the rectal fluid of primitive attine ants. | | 1971 | 5097113 |
| resistance potential of certain breeds of domestic fowl exposed to raillietina tetragona infections. 3. species of ants as intermediate hosts for certain fowl cestodes. | | 1971 | 5102472 |
| [electron microscope studies of lung differentiation of rats ants and post partum]. | | 1971 | 5131224 |
| [variations in antennal segments among various species of ants]. | | 1971 | 5165390 |
| [intraspecific and interspecific variations in the antennas of ants]. | | 1971 | 5169463 |
| loss of rhythmic activity in female ants caused by mating. | | 1969 | 5353569 |
| [optical orientation according to black and white patterns in different size classifications of cataglyphis bicolor fab. (formicidae, hymenoptera)]. | | 1969 | 5387093 |
| chemical defense of brood by a social wasp. | ants are a constant threat to the nests of tropical social wasps. adults of the neotropical social wasp mischocyttarus drewseni apply a secretion to the nest stem which is repellent to ants foraging for food by scouting and recruiting, and effectively keeps them from gaining access to the nest and discovering the brood. | 1970 | 5445937 |
| the biochemical basis of the fungus-attine ant symbiosis. | the natural history of the fungus-growing ants provides a spectacular example of a symbiotic association of two very different types of organisms. an anthropomorphic description is difficult to resist. the ants are efficient and industrious farmers. their single crop is a fungus, grown on a substrate of leaves in carefully fertilized, welltended gardens. virtually every facet of the ants' behavior and life cycle has been shaped by their association with the fungus they culture. a characteristic ... | 1970 | 5447529 |
| karyotypes of twenty-one ant species (hymenoptera; formicidae), with reviews of the known ant karyotypes. | | 1970 | 5487915 |
| antemortem ants bite and coma. a case report. | | 1970 | 5490366 |
| characterization of trehalase from labial glands of ants. | | 1971 | 5545476 |
| chemical communication and "propaganda" in slave-maker ants. | slave-maker ants of the formica sanguinea group direct their raids by means of odor trails. artificial trails made from whole-body extracts and extracts of dufour's glands and hindguts can be used to guide columns of workers to selected target colonies and to initiate raids. in workers of f. pergandei and f. subintegra, members of the f. sanguinea group, the dufour's glands are hypertrophied and contain large quantities of three acetates (decyl, dodecyl, and tetradecyl), which are discharged at ... | 1971 | 5548706 |
| 2,5-dichlorophenol (from ingested herbicide?) in defensive secretion of grasshopper. | the defensive froth emitted by the grasshopper romalea microptera contains several odorous compounds (phenols, terpenes, benzoquinone), including a chlorinated aromatic compound, 2,5-dichlorophenol. this compound, which is repellent to ants and therefore defensively useful to the grasshopper, probably stems from herbicide or herbicide derivative ingested by the insect with its diet. although there is precedent for the defensive employ by one species of chemical agents produced by another, no ins ... | 1971 | 5548709 |
| manipulatory learning in ants. | | 1971 | 5554181 |
| [migration of metacercariae of the lauceolate trematode in ants]. | | 1971 | 5564478 |
| on the guarding of leafcutter ants by minima-workers. | | 1967 | 5589503 |
| [intracellular symiontic bacteria in the central nervous system of ants]. | | 1967 | 5601900 |
| [results of using certain repellents for forest ants formica rufa]. | | 1967 | 5609990 |
| ["enticing positions" during readiness for copulation in ergatoid females of harpagoxenus sublaevis nyl (hymenoptera, formicidae)]. | | 1968 | 5661437 |
| [on the learning capacities of ants]. | | 1968 | 5703117 |
| homing in the ant cataglyphis bicolor. | cataglyphis bicolor, an ant widely distributed in north africa and the near east, orient to the sun as well as to visual patterns of the environment. these two mechanisms can be separated. foraging ants (hunters) orient to terrestrial cues as long as possible, and only after these have become ineffective do they switch over to the menotactical sun orientation. in the digging individuals, however, the visual knowledge of locality is significantly inferior to that of the hunters. diggers vary cons ... | 1969 | 5774195 |
| the transport of prey by ants. | | 1965 | 5824949 |
| contribution to the ethology of leptothorax acervorum (hymenoptera: formicidae). | | 1966 | 5943861 |
| assimilation and transfer of mirex in colonies of texas leaf-cutting ants. | | 1966 | 5976102 |
| [trehalase in the labial glands of formica polyctena f. (hymenoptera, formicidae)]. | | 1966 | 5988692 |
| alkaline phosphatase and leucine aminopeptidase association in plasma of the chicken. | two electrophoretic vari ants of leucine aminopeptidase show direct association with two genetically controlled forms of alkaline phosphatase. treatment of plasma with neuraminidase converted the faster-migrating form of both enzymes to slower-moving forms, but plasmas with slowermigrating forms were unaffected by this treatment. the two forms of the enzymes may be due to the presence or absence of a single gene controlling the attachment of sialic acid to the enzyme molecules. | 1967 | 6024189 |
| defensive use of a "fecal shield" by a beetle larva. | the larva of cassida rubiginosa carries a tight packet of cast skins and feces on a fork held over its back. the packet is a maneuverable shield used by the larva to protect itself against attack. it is highly effective in blocking the bite of ants. | 1967 | 6058687 |
| angle sense in cats and ants. | | 1967 | 6067643 |
| circadian rhythms in female ants, and loss after mating flight. | | 1967 | 6080521 |
| mechanism of action of fire ant (solenopsis) venoms. i. lytic release of histamine from mast cells. | the mechanism of histamine release from rat mast cells by whole venom from solenopsis geminata and s. invicta or by 2-methyl-6-undecylpiperidine hcl (c11) was investigated. histamine release stimulated by one or more of these agents (1) occurred in normal and metabolically inactivated cells, (2) had a biphasic time course in normal and inactivated cells, (3) was temperature dependent and did not occur at 0 degrees c, (4) was accompanied by concomitant cytoplasmic enzyme release, (5) was accompli ... | 1982 | 6184853 |
| diagnosis of polistes wasp hypersensitivity. | patients referred from the houston, texas, metropolitan area were evaluated for allergic reactions to insect stings. forty-eight persons reported at least one systemic reaction caused by a polistes paper-nest wasp sting. honey bees, imported fire ants, and other types of hymenoptera were identified in that order by 19 other subjects with systemic allergic reactions. life-threatening airway obstruction and/or hypotension were noted by most of our patients. wasp venom skin testing was positive in ... | 1983 | 6194197 |
| actions of hallucinogens on ants (formica pratensis)--iii. social behavior under the influence of lsd and tetrahydrocannabinol. | | 1980 | 6245012 |
| inhumation: how ants and other invertebrates help seeds. | | 1982 | 6283363 |
| epidemiologic aspects of salmonellosis in reptiles, amphibians, mollusks and crustaceans--a review. | salmonellae have been found associated with all of the poikilothermic vertebrate species studied, as well as the mollusks and crustaceans. some of these animals have been incriminated in the transmission of salmonellosis to other higher vertebrates or to man, but in many cases they remain as only potential sources of the disease because of inadequate epidemiologic study. it would appear that they are important unrecognized reservoirs of the salmonella organism in nature. with the increasing worl ... | 1984 | 6389405 |
| [occurrence and biology of rhodnius neglectus lent, 1954 in palm trees of suburban areas of belo horizonte, minas gerais]. | eighty-one "macaubeiras" palm-trees (acrocomia sclerocarpa) from the periphery of belo horizonte city were cut down and dissected between april 1979 and july 1980. 60.5% of the trees were positive for r. neglectus and 463 specimens of this insect were collected, providing a mean rate of 9,45 individuals for positive palm-trees. r. neglectus seems to present a single annual generation in this region, but evidence was obtained that two generations may occur. its spawn period is related to the hot ... | 1984 | 6443015 |
| [control of monomorium pharaonis using a methoprene bait in the berlin zoo and its combined application with a residue insecticide in the olomouc children's clinic]. | the control of monomorium pharaonis by a methoprene bait in the tierpark berlin and its combined application with a residue insecticide in the children's hospital in olomouc. in two different institutions heavy infestations with the pharaoh's ant (monomorium pharaonis l.) could be eradicated with a methoprene bait applied by different methods. in a zoological garden the bait was continuously exposed in boxes for many weeks. the dosage was about 2.5 g/10 m2, and 1.42 kg of dybh-bait were used. on ... | 1984 | 6465616 |
| [1st demonstration of the ant pest tapinoma melanoceyhalum (hymenoptera, formicidae) in east germany]. | | 1984 | 6465618 |
| effects of cigarette smoking on human aggressive behavior. | nicotine administered by smoking experimental cigarettes produced decreases in two types of aggressive responses elicited by low and high frequency subtractions of money which were attributed to another "person". the suppressing effects of smoking different doses of nicotine on aggressive responses was dose-dependent, in that smoking the high dose of nicotine produced more suppression than smoking the low dose. the ostensible subtraction of money from another "person", the more aggressive respon ... | 1984 | 6514753 |
| [preliminary serological study of fungus cultivated by the manioc ant acromyrmex octospinosus reich in guadeloupe]. | the serologic study of four strains of fungus cultivated by acromyrmex octospinosus (reich) in guadeloupe has revealed four major antigens common to all four strains. two additional weaker antigens were present in some but not all strains, which may indicate quantitative differences in viral particles in the hyphae of the fungi. the use of serological techniques should facilitate taxonomic study of the fungi (and possibly the virus or viruses which parasitize the fungi) cultivated by different s ... | 1981 | 6788387 |
| genetic population structure in polygynous formica ants. | genetic population structures, both mating and interaction structures, were investigated in three polygynous formica ants by examining how genotype frequencies are distributed among the nests in their populations. the study is based on electrophoretically analysed enzyme polymorphisms. the patterns of genotypic variation among single-nest workers suggest that polygyny is functional in all the three species. the observed genotype frequencies indicate outbreeding within the study areas, and no spa ... | 1982 | 6951823 |
| carcinogenicity of dichlorvos. | dichlorvos, 2,2-dichlorovinyl dimethyl phosphate, an organophosphate insecticide, is widely used for the control of agricultural, industrial, and domestic pests (fig. 1) [1]. dichlorvos is administered orally as an anthelmintic to swine, horses, cats, and dogs. it is applied by dermal application to cattle, goats, sheep, swine, and chickens to control fleas, flies, and mites. cucumbers, radishes, lettuce, and tomatoes are treated with dichlorvos in greenhouses. aerosols and strips are used for t ... | 1981 | 7009035 |
| [alleged and real signs of contact gunshot wounds of entrance holes of skull bones (author's transl)]. | this report on firearm tests with dead bodies deals with external marginal splinterings from entrance holes in bone, the trapping of hairs, and the stability of powder smoke deposits on bones under the influence of special postmortal conditions and preparatory treatment. the investigations were carried out in connection with an expertise in a case of murder in africa in which the question of the distance of shooting had to be evaluated after 6 months of decomposition, action of ants, and prepara ... | 1982 | 7080673 |
| [tests with several new repellents against pharaoh ants]. | | 1982 | 7081767 |
| incidence of stings or bites of the red imported fire ant (hymenoptera: formicidae) and other arthropods among patients at ft. stewart, georgia, usa. | | 1982 | 7154016 |
| avermectin b1a: effects on the ovaries of red imported fire ant queens (hymenoptera: formicidae). | | 1982 | 7154028 |
| [bacteriological inhibition in the nests of acromyrmex octospinosus reich]. | media prepared from nests of acromyrmex octospinosus reich show an inhibiting activity against strains of bacteria gram + and gram -. to demonstrate this activity it is necessary to use a particular methodology using important concentration of extract (mass effect). the main reason of the inhibition is due to the acidity of ph (ph = 5.0). this effect explains how the ants protect their nest against the bacterial competitors. | 1982 | 7172361 |
| avermectin b1a: highly potent inhibitor of reproduction by queens of the red imported fire ant (hymenoptera: formicidae). | | 1982 | 7175003 |
| [dermatologic entomology. the practical medical importance of mites and insects in switzerland and its surrounding regions. 14. formicidae/ants]. | | 1980 | 7255326 |
| red imported fire ants (hymenoptera: formicidae): frequency of sting attacks on residents of sumter county, georgia. | | 1981 | 7299792 |
| observations on the food habits of some african rodents. | food habits of four common species of african rodents: the giant rat (cricetomys gambianus), the black house rat (rattus rattus), the multimammate rat (mastomys natalensis) and the pygmy mouse (mus minutoides) were studied on the basis of stomach content analysis, habitat sampling and experimental trials with caged animals. vegetable items (especially grass, grains and tubers) formed the bulk of the food of all the species. oil-palm nuts and kernels were also common in the guts of c. gambianus a ... | 1980 | 7323341 |
| theoretical analysis of the communication system for chemical mass recruitment in ants. | | 1980 | 7431942 |
| cerebral larvae in the second intermediate host of dicrocoelium dendriticum (rudolphi, 1819) and dicrocoelium hospes looss, 1907 (trematodes, dicrocoeliidae). | cerebral larvae of dicorcoelium dendriticum and d. hospes and the brains of infected ants were studied. morphologic differences of the freed larvae could not be found, but there were evident differences in number and localization of the cerebral stages. ants infected with d. dendriticum usually showed one "hirnwurm" while in the majority of the ants infected with d. hospes two larvae were found. the typical localization of the "hirnwurm" of d. dendriticum was in the ventral part of the subesopha ... | 1980 | 7434876 |
| outbreak of botulism in kenya after ingestion of white ants. | | 1980 | 7448568 |
| deaths from bites and stings of venomous animals. | data abstracted from 34 death certificates indicate that the three venomous animal groups most often responsible for human deaths in california from 1960 through 1976 were hymenoptera (bees, wasps, ants and the like) (56 percent), snakes (35 percent) and spiders (6 percent). an average incidence of 2.0 deaths per year occurred during these 17 years, or an average death rate of 0.01 per 100,000 population per year. nearly three times more males than females died of venomous animal bites and sting ... | 1980 | 7467305 |
| pattern recognition in insects. | after 80 years of research, the field of insect pattern recognition is about to move from the behavioral to the neuronal level. recent experiments on bees, ants and flies indicate that pattern recognition must be seen as the recruitment of behavioral operations that help the nervous system to solve a task using a small number of potentially simple processing steps. these may now be identified physiologically. | 1995 | 7488849 |
| fish analysis of the telomere sequences of bulldog ants (myrmecia: formicidae). | chromosomes from several species of ants from the genus myrmecia were hybridized with deoxyoligomer probes of either (t2ag2)7, the putative insect telomere repeat sequence, or (t2ag3)7, the vertebrate telomere repeat sequence. while both sequences hybridized over a range of stringency conditions, (t2ag2)n was clearly the predominant sequence at the termini of the myrmecia chromosomes. no interstitial sites of either sequence were detected. the genus myrmecia has a wide range of karyotypes, with ... | 1995 | 7587589 |
| roger's ants: a new pest in hospitals. | | 1995 | 7613391 |
| [cold tolerance of the pharaoh's ants (monomorium pharaonis)]. | the reaction of pharaoh's ants to low temperatures was analyzed under laboratory conditions. it was to be clarified in which way low temperature could be used in control measures. in all of the examined ranges of temperature from + 8 degrees c up to --26 degrees c colonies of the pharaoh's ants were eradicated. the necessary exposition times reached from 30 minutes at --26 degrees c up to nearly 3 weeks at + 8 degrees c. most favourable for control measures are temperatures near 0 degrees c whic ... | 1980 | 7447067 |
| camponotus compressiscapus andré (hymenoptera, formicidae) an experimental second intermediate host of dicrocoelium hospes looss, 1907 (trematodes, dicrocoeliidae). | infection experiments showed that the african ant camponotus compressiscapus can serve as a second intermediate host of dicrocoelium hospes. most of the cercariae penetrated the crop-wall and encysted in the hemocoel, whereas one or more larvae invaded the ant's central nervous system. these larvae cause behavioral changes, which increase their chance of being ingested by final hosts. experimental infections of definitive hosts were obtained in golden hamsters, meriones unguiculatus, guinea-pigs ... | 1980 | 7434875 |
| capillary electrophoresis separation of oligosaccharides: i. effect of operational variables. | the influence of operating variables on the separation of labeled oligosaccharide molecules in capillary electrophoresis with polymer networks is presented. in this study, an equation was derived that relates the effects of electrophoresis variables such as field strength, temperature, molecular weight and gel concentration to the migration velocity. as a model system, 8-aminonaphthalene-1,3,6-trisulfonate ants-labeled wheat starch digest was examined to show the validity of the equation. as an ... | 1994 | 7720688 |
| the natural history of exposure to the imported fire ant (solenopsis invicta). | imported fire ants (ifa) are a common cause of insect venom hypersensitivity in the southeastern united states. the purpose of this study was to determine the sting attack rate and development of specific ige in an unsensitized population. | 1995 | 7722162 |
| persistent positive visual phenomena in migraine. | ten patients with migraine developed persistent positive visual phenomena lasting months to years. the complaints were similar in their simplicity and involvement of the entire visual field and usually consisted of diffuse small particles such as tv static, snow, lines of ants, dots, and rain. neurologic and ophthalmologic examinations were normal, and eegs were normal in eight of eight patients tested. mri was normal in all patients except one who had nonspecific biparietal white matter lesions ... | 1995 | 7723952 |
| some enzymic activities of two australian ant venoms: a jumper ant myrmecia pilosula and a bulldog ant myrmecia pyriformis. | venoms from two related australian ants, a jumper ant (myrmecia pilosula) and a bulldog ant (myrmecia pyriformis), were quantitatively analysed for the following enzymic activities: phospholipase a2, phospholipase b, phospholipase c, hyaluronidase, esterase, acid phosphatase, alkaline phosphatase and phosphodiesterase. both venoms contained phospholipase a2, phospholipase b, hyaluronidase, acid phosphatase and alkaline phosphatase activities. myrmecia pyriformis venom had significantly greater p ... | 1994 | 7725323 |
| [laboratory testing of control of the monomorium pharaonis l. ants with the use of juvenile hormones]. | | 1981 | 7313455 |
| microsatellites reveal high genetic diversity within colonies of camponotus ants. | in order to characterize the sociogenetic structure of colonies in the carpenter ants camponotus herculeanus and c. ligniperda, we have developed microsatellite markers. the three loci studied were either fixed for different alleles in the two species or showed different patterns of polymorphisms. genotyping of workers and males showed that the broods of c. ligniperda include several matrilines, a rare phenomenon in the genus. five alleles from a locus polymorphic in both species were sequenced ... | 1995 | 7735528 |
| [tendency of pharaoh ants, monomorium pharaonis (l.), of spreading in poland]. | | 1981 | 7313441 |
| epigenesis and the evolution of social systems. | the remaining problems of biology, which include the nature of the molecular regulation of development, the relation between micro- and macroevolution, the mind/body association, and the linkage between genetic and cultural evolution, all appear to be most readily soluble by attention to the epigenesis of individual organisms. societies offer special advantages in the analysis of epigenesis. the constituent parts, consisting of the whole member organisms, can be observed more directly than cells ... | 1981 | 7276518 |
| [ocular lesions in lepromatous leprosy (author's transl)]. | ocular lesions observed in iii cases of lepromatous or borderline leprosy are described. tables are included which indicate the visual acuity, corneal sensitivity, and lesions noted in the appendages. particular attention is paid to lesions in the pars plana, which include true posterior cyclitis having the appearance of "ants eggs" or "pearls" deposits on the retina, associated with vascular lesions and peripheral hyalitis. the absence of associated mucular edema is strongly emphasized. the eti ... | 1980 | 7229268 |
| are the ants capable to learn the nest-building activity atypical to the species? (a study of formica cinerea mayr.). | formica cinerea ants are the species digging their nests in the ground, so they never handle thicker building materials. under conditions unfavorable to their normal existence, brought about by several years of continued meteorological disturbances, one colony of ants established itself in an atypical and unique in this species mound-shaped nest, similar to the nests of the hill-building species of formica. on the basis of observations of individual building workers it was determined that most o ... | 1982 | 7184328 |
| childhood insect bite reactions to ants, wasps, and bees. | | 1994 | 7924443 |