Publications

ultrastructure of the midgut epithelial cells in the fly calliphora erythrocephala.		1971	4329464
[histochemical studies on the eye of the blowfly calliphora erythrocephala meig. i. atp-ase, acid phosphatase, alkaline phosphatase and glucose-6-phosphatase].		1971	4332957
changes in the functional efficiency of flight muscle sarcosomes during heat death of adult calliphora erythrocephala.		1971	4255709
[histochemical investigations of the eye of the blowfly calliphora erythrocephala meig. ii. nucleosidephosphatases, thiaminepyrophosphatase, nonspecific esterase, and cholinesterase].		1972	4262566
microspectrophotometry of arthropod visual screening pigments.	absorption spectra of visual screening pigments obtained in vitro with a microspectrophotometer using frozen sections are given for the insects musca domestica, phormia regina, libellula luctuosa, apis mellifera (worker honeybee only), drosophila melanogaster (wild type only) and the arachnids lycosa baltimoriana and lycosa miami. the spectral range covered is 260-700 nm for lycosa and drosophila and 310-700 nm for the remainder of the arthropods. a complete description of the instrumentation is ...	1972	4623852
[a new type of blood cell (the thrombocytoid) in calliphora erythrocephala].		1972	4628303
[3-dehydroecdyson, a metabolic product of ecdysons in the blowfly calliphora erythrocephala meigen].		1972	4649850
brush-border formation in the midgut of an insect, calliphora erythrocephala meigen. the formation of microvilli in the midgut during embryonic development.		1972	4334735
biochemical and structural variations in the flight muscle mitochondria of ageing blowflies, calliphora erythrocephala.		1972	4336113
ultrastructural changes in developing midgut epithelium of calliphora erythrocephala meigen.		1972	4339566
the ultrastructure and function of pericardial cells and other nephrocytes in an insect: calliphora erythrocephala.		1972	4348054
ultrastructural changes during transition of larval to adult intersegmental muscle at metamorphosis in the blowfly calliphora erythrocephala. i. dedifferentiation and myoblast fusion.		1972	5021251
ultrastructural changes during transition of larval to adult intersegmental muscle at metamorphosis in the blowfly calliphora erythrocephala. ii. the formation of adult muscle.		1972	5021252
lysosomes in the midgut of calliphora erythrocephala meigen.		1972	5042777
in vivo effects of -amanitin on rna synthesis in calliphora erythrocephala.		1972	5049470
the haemocytes of calliphora erythrocephala (meig.) (diptera).		1973	4355160
embryogenesis of calliphora erythrocephala. 3. ultrastructure of the midgut epithelial cells during late embryonic development.		1973	4358758
investigations on the transport function and structure of peritrophic membranes. 3. periodic incorporation of glucose, methionine and cysteine into the peritrophic membranes of the blowfly calliphora erythrocephala mg. in vivo and in vitro.		1973	4123259
purification and properties of a phenol oxidase from the blowfly calliphora erythrocephala.		1973	4123357
extracellular ribosomes during metamorphosis in the blowfly calliphora erythrocephala.		1973	4748818
the stereochemistry of hydrogen elimination from c-7 during biosynthesis of ecdysones in insects and plants.	1. [7alpha-(3)h(1)]- and [7beta-(3)h(1)]-cholesterol were synthesized by a modified method. 2. the stereochemistry of delta(7)-bond formation during ecdysone and ecdysterone biosynthesis in the insect, calliphora erythrocephala and the plants, taxus baccata and polypodium vulgare was investigated by using [4-(14)c,7alpha-(3)h(1)]cholesterol and [4-(14)c,7beta-(3)h(1)]cholesterol. 3. in each case, the 7beta hydrogen was stereospecifically eliminated. 4. the possible significance of the results is ...	1973	4772621
protein metabolism by the salivary glands and other organs of the larva of the blowfly, calliphora erythrocephala.		1974	4815640
the contribution of the fatbody to rna and ribosomal changes during development of the blowfly calliphora erythrocephala (meig).		1974	4826294
[lemon--another eye colour mutant in the blowfly calliphora erythrocephala].		1974	4837324
hormonal control of resilin deposition in the blowfly, calliphora erythrocephala.		1974	4839330
the ultrastructure of the developing leg disk of calliphora erythrocephala.		1974	4847934
secretion of hyperglycaemic hormone from the corpus cardiacum of flying blowflies, calliphora erythrocephala.		1974	4854213
the abdominal epidermis of calliphora erythrocephala (diptera). i. polyteny and growth in the larval cells.		1974	4417501
embryogenesis of calliphora erythrocephala meigen. iv. cell death in the central nervous system during late embryogenesis.		1974	4434463
fine structure of the fat body of the female of calliphora erythrocephala during the first egg-maturation cycle.		1974	4434465
[morphogenesis of gonads in calliphora erythrocephala. descriptive study].		1974	4451973
the relation between larval and adult abnormalities in the abdominal segmentation of calliphora erythrocephala (diptera).		1974	4463217
[ultrastructural aspects of the integumentary histoblast areas of the abdomen of calliphora erythrocephala during the first larval stage].		1974	4219150
the atpase system in the compound eye of the blowfly, calliphora erythrocephala (meig).		1975	240606
[the in vivo synthesis of ribonucleic acid in the imaginal wing discs during calliphora erythrocephala development].		1975	808282
the hydroxylation of tyrosine by an enzyme from third-instar larvae of the blowfly calliphora erythrocephala.	1. two pro-(phenol oxidase) were distinguished when the blood of late-third-instar larvae of calliphora erythrocephala was electrophoresed in polyacrylamide gels with tris-glycine buffer, ph 8.3. one pro-(phenol oxidase), after activation by an enzyme readily catalyses the oxidation of both l-tyrosine and l-3,4-dihydroxyphenylalanine (l-dopa). the second enzyme catalyses the oxidation of l-dopa but not of l-tyrosoine. 2. one of the pro-(phenol oxidases) was purified over 2000-fold from homogenat ...	1975	810140
the isolation of an o-diphenal oxidase from third-instar larvae of the blowfly calliphora erythrocephala.	1. the isolation of an o-diphenol oxidase from an acetone-dried powder of late-third-instar larvae of calliphora erythrocephala was investigated. an insoluble and micro-crystalline fraction containing the enzyme activity was obtained after fractionating extracts of the acetone-dried powder with (nh4)2so4 and acetone. 2. this fraction can be solubilized in 0.1% sodium dodecyl sulphate without loss of activity. 3. polyacrylamide-gel electrophoresis in the presence of sodium dodecyl sulphate shows ...	1975	812490
ecdysone oxidase, an enzyme from the blowfly calliphora erythrocephala (meigen).	in the blowfly, the formation of 3-dehydroecdysone from the insect molting hormone ecdysone is catalyzed by an enzyme which carries hydrogen from ecdysone and ecdysterone to oxygen. the enzyme is therefore called "ecdysone oxidase". two methods are described for the detection of ecdysone oxidase activity, one using a radiolabelled substrate which is separated from the product by thin-layer chromatography after the reaction, and the other using dichloroindophenol, which is discoloured by the redo ...	1975	297
metabolism of beta-[3-h]ecdysone during the larval-pupal stage of the blowfly calliphora erythrocephala.		1975	1126545
linear and non-linear performance of transducer and pupil in calliphora retinula cells.	1. intracellular recordings have been made from the blowfly (calliphora erythrocephala) retinula cell; apart from the transducer mechanism, these cells also feature a pupil mechanism. 2. at several mean intensity levels, within the apparently linear range of response, frequency characteristics of amplitude and phase and responses to 'delta'-flashes and 'delta'-flash pairs have been obtained. 3. fourier methods have shown these responses to be mutually compatible, confirming linearity in these ci ...	1975	1142250
in vitro synthesis of peritrophic membranes of the blowfly, calliphora erythrocephala.		1975	1159308
role of the "thrombocytoids" in capsule formation in the dipteran calliphora erythrocephala.	of the three hemocyte types present in the blood of calliphora, only one participates in capsule formation around implanted cellophane. this hemocyte, the thrombocytoid, shows in the blood a tendency to dissociate into numerous small cytoplasmic fragments, comparable to the mammalian megakaryocyte. this tendency is dramatically increased during the process of encapsulation. most of the intact thrombocytoids and the numerous fragments participating in capsule formation do not show any particular ...	1975	1182767
independent replication of the ribosomal rna genes in the polytrophic-meroistic ovaries of calliphora erythrocephala, drosophila hydei, and sarcophaga barbata.	by filter saturation hybridizations the ribosomal (r)dna contents of the ovaries calliphora erythrocephala, drosophila hydei, and sarcophaga barbata have been measured in comparison to the rdna percentages of their diploid brains. the measurements of the ovarian rdna have been carried out on ovaries where the nurse cells in the distal egg chamber of the ovarioles had reached their highest ploidy level. the diploid rdna content of each of the respective species was chosen as a 100% standard and t ...	1975	1201686
mode of formulation of cholesta-5,7-dien-3beta-ol from cholest-5-en-3beta-ol by larvae of calliphora erythrocephala.	1. the conversion of cholest-5-en-3beta-ol (cholesterol) into cholesta-5,7-dien-3beta-ol by axenic calliphora erythrocephala larvae was demonstrated. 2. the transformation is probably direct (delta(5)-->delta(5,7)) and does not involve a delta(0) intermediate (delta(5)-->delta(0)-->delta(7)--> delta(5,7)). 3. delta(7)-bond formation involves the stereospecific elimination of the 7beta hydrogen atom. 4. the relative amounts of free and esterified sterols were determined in larvae grown on cholest ...	1975	1220687
juvenile hormone and dna synthesis in imaginal disks of calliphora erythrocephala: results of a new incubation technique.		1976	1249433
the fine structure of peritrophic membranes of the blowfly, calliphora erythrocephala, grown in vitro under different conditions.		1976	1249440
water transport across peritrophic membranes of calliphora erythrocephala--vii.		1976	7407
the comparative biochemistry of invertebrate mucopolysaccharides-v. insecta (calliphora erythrocephala).		1976	129315
changes in acid mucopolysaccharides during the development of the blowfly, calliphora erythrocephala.		1976	133191
[acid phosphatase activity in the hemolymph of the fly calliphora erythrocephala during metamorphosis].	acid phosphatase is present in the haemolymph of the fly calliphora erythrocephala. the activity of this enzyme has been studied during development; it shows a marked increase during hours following pupation. this increase of activity may be related to the histolytic processes which are acting during metamorphosis.	1976	139998
an ultrastructural study of the in vitro phagocytosis of escherichia coli by the hemocytes of calliphora erythrocephala.		1976	775121
excretion of alkaloids by malpighian tubules of insects.	nicotine is transported at high rates by malpighian tubules of larvae of manduca sexta, pieris brassicae and rhodnius prolixus and the transport persists in the absence of alkaloid from the diet. in the fluid-secreting portion of rhodnius tubules this transport is not coupled to ion transport, nor is it dependent on the physiological state of the animal. the transport, which can occur against a steep electrochemical gradient, shows saturation kinetics with a maximal rate of 700 pmol. min-1 per t ...	1976	932618
intracellular responses from cells of the medulla of the fly, calliphora erythrocephala.		1976	953083
effects of weismann ring gland on rna synthesis in imaginal wing disks of calliphora erythrocephala.		1976	965778
[host range of drosophila melanogaster c virus among diptera and lepidoptera (author's transl)].	the host range of the c picornavirus of drosophila melanogaster was studied, using numerous strains of drosophila together with four other genera of diptera and two species of lepidoptera. c virus was injected into the different hosts and serially passaged in them. the extracts from each passage were biologically assayed on virus free d. melanogaster. four different situations were found. 1) a high level of multiplication leading, in 45 strains of drosophilidae, to the early death of the hosts. ...	1976	823856
pattern and polarity of sclerites in adult abdominal segments of calliphora erythrocephala (diptera): anlage rotation experiments.	the anlagen of imaginal histoblasts in the abdominal segments of calliphora (higher diptera) present an interesting problem, which bears on recent concepts employed in the consideration of spatial patterning in insects. they differ from imaginal discs with respect to larval organization and activity, and in the absence of the progressive pattern of genetic determination during the larval period, characteristic of imaginal discs. how is the adult pattern in the abdominal segments determined? the ...	1977	870595
ultrastructure of the myocardial cell and its membrane systems in the adult fly calliphora erythrocephala (insecta: diptera).	calliphora erythrocephala has cross-striated cardiac muscle cells with a, i and z-bands. the diameters of the myosin and actin filaments are 200-250 a and 85 a respectively and the length of the myosin filaments (a-band) is approximately 1.5 micron. usually 8-10 actin filaments surround each myosin filament. the myocardial cells show a well-developed membrane system and interior couplings. a perforated sheet of sr envelopes the myofibrils at the a-band, dilates into flattened cisternae at both a ...	1977	872197
a family of quasi-white random signals and its optimal use in biological system identification. part ii: application to the photoreceptor of calliphora erythrocephala.		1977	889958
[comparative study of hemocyte capsule formation in locusta migratoria, melolontha melolontha and calliphora erythrocephala].		1977	900777
the effect of prostaglandin e1 on cyclic amp production in the salivary glands of calliphora erythrocephala.		1977	198235
the abdominal epidermis of the blowfly calliphora erythrocephala. ii. imaginal histoblasts during larval life.	abdominal histoblasts in calliphora (diptera) are situated within the larval epidermis, and secrete larval cuticle throughout the 3 larval instars. an optical and electron-microscopic study of histoblasts and epidermal sensilla suggests that the latter have been previously confused with histoblast anlagen in the first instar. a steady rate of division until the mid-third instar leads to anlagen growth, which is not seen in larval drosophila. after a relatively quiescent period, division begins a ...	1977	599177
the effect of chromosomal polytenization on the rates of rna synthesis and decay in the salivary glands of the blowfly, calliphora erythrocephala.		1978	620873
[morphogenesis of the imaginal abdominal epidermis in calliphora erythrocephala (insecta,diptera)].	the morphogenesis of the abdominal epidermis in calliphora erythrocephala begins by a cellular proliferation which proceeds slowly in larvae and rapidly in pupae. this allows histoblasts to glide and invade the whole abdominal surface. as soon as the new epidermal sheet has become continuous, differentiation begins. generalized epidermal cells show an intense activity which leads to the deposition of imaginal cuticle from the 6th day after pupation onwards. after cuticle deposition they darken a ...	1978	632740
ontogenic fate of cerebral neurosecretory cells in calliphora erythrocephala (meig.) (cyclorhapha: diptera).		1978	640538
the differential regulation of the synthesis of ribosomal rna, 5 s rna, and 4 s rna in the polytenic salivary gland cells of the blowfly, calliphora erythrocephala.		1978	680366
production of specific-protein secretion granules by fat body cells of the blowfly, calliphora erythrocephala. substitution of an ovarian key factor by beta-ecdysone.	during the first four days of the imaginal stage the fat cells of ovariectomized females of calliphora develop a protein synthetic apparatus, and produce dense bodies (lysosomes) as do the fat cells of normal females, but apparently they cannot synthesize the protein secretion granules that characterize the productive phase of the fat cells of normal females and that we believe to represent vitellogenin. injection of ovariectomized females with beta-ecdysone restored the ability of the fat cells ...	1978	719713
fixation-sensitive areas in the eyes of the walking fly, calliphora erythrocephala.	in calliphora erythrocephala the visual fixation behaviour in one-eyed flies and partial blinded flies has been investigated. one-eyed flies show approximately the same stripe and edge fixation response as intact flies. elimination of the frontal eye parts including the binocular field of vision does not effect the visual stripe fixation. on the other hand, if only the frontal areas of both eyes including the binocular field of vision are left open, no preferential direction can be observed (fig ...	1978	728495
[degeneration of the brush border in the midgut of calliphora erythrocephala meig].	the brush border of the intestinal epithelium is described in an actively feeding larvae of calliphora erythrocephala meig. it will persist intact after the appearance of the first signs of degeneration of the larval intestinal cells. it will then be invaginated inside the cell forming a "microvillar dense body."	1978	734198
chloramphenicol and ethidium bromide effects on flight-muscle mitochondria of the blowfly calliphora erythrocephala.		1978	744361
the presence of a hypoglucemic and hypotrehalocemic hormone in the neurosecretory system of the blowfly calliphora erythrocephala.		1978	569615
synthesis and turnover of hdrna and mrna in the salivary gland of the blowfly calliphora erythrocephala.		1979	437351
[ultrastructure of the mid-intestine muscle of the larva of calliphora erythrocephala meig].	the fine structure of the mid-gut muscle in larval calliphora erythrocephala meig. electron microscopy reveals and mid-gut muscle fibres to be composed of an array of actin and myosin myofilaments. the perforated z-band divides the fibril to sarcomeres. the average length of the sarcomere in 5,34 micrometer for the non contracted muscle and 2,09 micrometer for the fully contracted muscle. the thick filaments of the fully contracted muscle pass through the spaces of the z-structures.	1979	441456
transport of glial cell acid phosphatase by endoplasmic reticulum into damaged axons.	earlier observations indicated that cutting the photoreceptor (r) cell perikarya in the retina of the flies musca domestica and calliphora erythrocephala resulted in an extremely rapid degeneration of the r-cell axons. the process manifested itself within minutes and secondary lysosomes appeared early on in the degenerating axons. in this study, biochemical assays of the classical lysosomal marker enzyme acid phosphatase (acpase) showed a rapid increase in activity upon cutting the retina, reach ...	1979	457814
demonstration of acid phosphatase activity induced by 20-hydroxyecdysone in the fat body of calliphora.	in the larval fat body of calliphora erythrocephala, protein accumulation and autophagic activity occur prior to the onset of puparium formation. the involvement of the lysosomal system in the degradation of sequestered protein and cell organelles can be demonstrated by the electron-microscopical cytochemical localization of the lysosomal marker enzyme acid phosphatase in so-called protein granules. these granules contain not only newly synthetized or absorbed protein but also remnants of cell o ...	1979	487409
chromomeres and puffing in experimentally induced polytene chromosomes of calliphora erythrocephala.	in the most advanced types of meroistic ovaries the synthesis of rna for the growing oocyte in each follicle is taken over by nurse cells, i.e., sister cells of the definite egg cell. in calliphora, the highly polyploid nurse cells (nc) develop a polytene karyotype under conditions of strict brother-sister inbreeding and using a controlled selection technique. a comparison of the polytene nc-chromosomes with those from the pupal bristle forming cells reveals an unexpected discrepancy: while both ...	1979	510083
normal and experimentally induced lysosomal activity in the larval fat body of calliphora erythrocephala meigen.	acid phosphatase activity was demonstrated by em-cytochemistry in 4 day old third instar larvae of the fly calliphora erythrocephala meigen, but not in younger stages. during larval development, the activity increased, reaching a maximum at the onset of pupariation. the reaction product was localized in golgi vesicles and sacculi, in vacuoles and in protein granules of varying size and composition, confirming the autophagic character of the protein granules. throughout larval development, the re ...	1979	519734
how far does exposure to radiation mimic ageing in insects?--i. life table data from the blowfly, calliphora erythrocephala.		1979	520433
changes in cyclic amp and cyclic gmp concentrations during the action of 5-hydroxytryptamine on an insect salivary gland.	salivary glands from adult blowflies (calliphora erythrocephala meigen) were studied in vitro. the time course of changes in cyclic amp content of the glands was followed at different concentration of 5-hydroxytryptamine. there was an immediate biphasic rise and fall in cyclic amp content, following by a slower rise and subsequent gradual decline. the initial rise preceded the onset of fluid secretion by the glands. rises in cyclic amp content were inhibited by compound rmi 12330 a (an adenylate ...	1980	6272697
the ribosomal dna of calliphora erythrocephala; and analysis of hybrid plasmids containing ribosomal dna.		1980	6267288
pharmacokinetics of dieldrin with special reference to its metabolism in the epicuticular wax layer in calliphora erythrocephala.		1980	7190112
the effect of chloramphenicol, ethidium bromide and cycloheximide on mortality and mitochondrial protein synthesis of adult blowflies.	the effects of cycloheximide, chloramphenicol and ethidium bromide on the blowfly calliphora erythrocephala were studied. in the first set of experiments, toxic levels were determined by examining activity and mortality of flies after injection of various doses of each drug. in the second set of experiments, the effect of drug treatment on flight muscle mitochondrial protein synthesis was determined in relation to age by following the incorporation of radioactively labelled amino acid, [3h]leuci ...	1980	7364884
biochemical and ultrastructural studies on flight muscle mitochondria from the blowfly calliphora erythrocephala following treatment by chloramphenicol and ethidium bromide.	adult blowflies were injected during the first day after eclosion with various concentrations of the drugs chloramphenicol and ethidium bromide. previous experiments had shown that these drugs inhibit mitochondrial protein synthesis and at high doses increase mortality. mitochondria isolated from blowflies 24 h after drug injection revealed a considerable decrease in oxidation rates when pyruvate plus proline were used as substrates. there was also a reduction up to 50% in the respiratory contro ...	1980	7364885
localisation of pancreatic polypeptide (pp)-like immunoreactive material in neurones of the brain of the blowfly, calliphora erythrocephala (diptera).	the brain of the blowfly, calliphora erythrocephala, has been studied by means of the peroxidase-antiperoxidase immunocytochemical method, with the use of antibodies to bovine pancreatic polypeptide (bpp). a number of immunoreactive neurones have been localised, some corresponding to neurones previously identified tentatively as neurosecretory. this finding is further evidence that biologically active peptides, previously considered to be "vertebrates", also exist in invertebrates. it also suppo ...	1980	7407856
polar granules and pole cells in the embryo of calliphora erythrocephala: ultrastructure and [3h]leucine labelling.	the polar granules in calliphora undergo a gradual fragmentation during early cleavage, but reaggregate after pole-cell formation. autoradiographic analysis showed that the pole cells in calliphora acquire a higher [3h]leucine label than the rest of the embryo during the blastoderm stage. such an increased label was not seen in the pole plasm before pole-cell formation or in the pole cells during gastrulation. electron microscopic autoradiography revealed that the polar granules are substantiall ...	1980	7437098
endocrine control of the metamorphosis of the larval muscles in calliphora erythrocephala (diptera): in vitro studies of the role of ecdysteroids.		1980	7439532
body movements and retinal pattern displacements while approaching a stationary object in the walking fly, calliphora erythrocephala.	when a walking fly approaches a stationary object two types of body movements are distinguishable. type i body movements are characterized by low frequencies (0.4-1.3 hz) and large amplitudes (28-65 degrees). superimposed on these movements are type ii body movements which are characterized by high frequencies (7.3-10.6 hz) and small amplitudes (5.9-8.2 degrees) (figs. 3-6; table 1). type ii movements occur no matter whether the fly is fixating a pattern or orientating itself in homogeneous surr ...	1980	7459402
the ribosomal dna of calliphora erythrocephala. the cistron classes of total genomic dna.		1981	7310879
gastrin/cholecystokinin (cck)-like immunoreactive neurones in the brain of the blowfly, calliphora erythrocephala (diptera).		1981	7011897
proteolytic activity of blowfly larvae secretions in experimental burns.	secretions of larvae of the blowfly calliphora erythrocephala digested experimental rat skin burn eschar in vivo and in vitro when applied topically in a vanishing cream base. debridement was characterized by de-epithelialization and digestion of dermal collagen to a subfollicular level over a 3-day period. analytic investigation of the secretions demonstrated the presence of enzymes with activities characteristic of trypsin, leucine aminopeptidase, and carboxypeptidases a and b. these were part ...	1981	7029766
length variation in the non-transcribed spacer of calliphora erythrocephala ribosomal dna is due to a 350 base-pair repeat.		1981	6267296
correlation of hnrnp structure and nascent transcript cleavage.	using electron microscopy of spread chromatin, we have observed nonnucleolar transcription units from drosophila melanogaster and calliphora erythrocephala that display specific cleavage of nascent transcripts. we have quantitatively analyzed 20 of these relatively long transcription units. the primary rnp structure of homologous transcripts is nonrandom with respect to both rna sequence and the cleavage event. in general, released rna fragments have a smooth fibrillar rnp morphology (approximat ...	1981	6174239
phosphatidylinositol-hydrolysing enzymes in blowfly salivary glands.	the salivary glands of adult blowflies (calliphora erythrocephala) contain enzymes that hydrolyse phosphatidylinositol, predominantly by a ca2+-independent deacylation, though a ca2+-dependent phosphodiesterase (phospholipase c) activity could be detected. the deacylating enzymes could also hydrolyse phosphatidylcholine and phosphatidylethanolamine, and were secreted in the saliva. homogenization of salivary glands prelabelled with [3h]inositol resulted in a rapid deacylation of the endogenous 3 ...	1982	6288018
permeability of gap junctions at the segmental border in insect epidermis.	we have examined cell-cell communication between epidermal cells of fifth-instar larvae of the milkweed bug oncopeltus fasciatus and those of maggots of the blowfly calliphora erythrocephala. ionic coupling and the transfer of injected lucifer yellow (molecular weight 450) and lead-edta (molecular weight 374) were used to map the pattern of communication. all epidermal cells, regardless of their position with respect to the segmental border, were ionically coupled. in both species lucifer yellow ...	1982	7060129
refractive index of the fly rhabdomere.	the refractive index and the diameter of the fly rhabdomere were determined by comparing the experimental results derived from interference microscopy with the results of theoretical study on the scattering of plane waves by a homogeneous, isotropic cylindrical dielectric rod. it was found that the refractive index of the isolated rhabdomere of calliphora erythrocephala is 1.363 +/- 0.003 in an area of the rhabdomere where its diameter is calculated to be 1.32 +/- 0.04 micrometers.	1982	7097383
morphological differentiation of the central visual cells r7/8 in various regions of the blowfly eye.	the central rhabdomeres in the retina of the blowfly calliphora erythrocephala and the house fly musca domestica are not structurally uniform. in calliphora, four classes of central rhabdomeres were found; they are formed by a total of seven types of central visual cells, clearly distinguished by the following structural features: length of the rhabdomeres r7 or r8, position of the nucleus, rhabdomere twist, fine structure in the r7/r8 transition region, and cross-sectional area of the rhabdomer ...	1982	7112539
comparative study of hemocytes and associated cells of some medically important dipterans.	the aim of this work is to study, characterize, and compare different morphological types of hemocytes of glossina austeni, g. morsitans, calliphora erythrocephala, stomoxys calcitrans, lucilia sericata, aedes aegypti, and culex quinquefasciatus. this information is intended to provide a basis for future studies of the cellular defense mechanisms of these dipterans. seven morphological types of hemocytes were identified by phase-contrast optics: prohemocytes, plasmatocytes, thrombocytoids, granu ...	1982	6764649
polyamines in early embryonic development: their relationship to nuclear multiplication rate, cell cycle traverse, and nucleolar formation in a dipteran egg.	polyamine synthesis and accumulation were assessed from fertilization until gastrulation in a dipteran egg (calliphora erythrocephala meigen). spermidine synthesis was activated immediately after fertilization, generating a broad spermidine peak during early cleavage. this period is characterized by the most rapid nuclear multiplication known from animal material. cleavage consists of nuclear multiplication only, and the egg remains syncytial until gastrulation. after nine synchronous nuclear di ...	1983	6825935
a new, possibly serotonergic, neuron in the lamina of the blowfly optic lobe: an immunocytochemical and golgi-em study.	with a modified golgi impregnation technique a new neuron type, with extensive tangential processes, was discovered in the optic lamina of the blowfly, calliphora erythrocephala. this cell is unusual since the majority of its varicose processes reside in a layer distal to the synaptic layer of the lamina. using antibodies to 5-ht it was found that this new cell type was 5-ht immunoreactive, and varicosities of golgi impregnated neurons analyzed electron-microscopically contain dense core vesicle ...	1983	6652496
lampbrush chromosomes in the meroistic ovaries of the blowfly calliphora erythrocephala.		1983	6668203
integumental chitin synthase activity in cell-free extracts of larvae of the australian sheep blowfly, lucilia cuprina, and two other species of diptera.	chitin synthase activity has been demonstrated in crude homogenates of larval integuments from l. cuprina and in similar preparations from musca domestica and calliphora erythrocephala. this is the first report of an insect integumental chitin synthase. this activity brings about the incorporation of radioactivity from udp-n-acetyl-[14c]glucosamine into an ethanol- and alkali-insoluble form. a major part of this labelled product has been characterized as chitin by its insolubility in alkali, res ...	1983	6228213