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alkaline protease associated with virus particles of a nuclear polyhedrosis virus: assay, purification, and properties.proteolytic activity was detected within polyhedra of the nuclear polyhedrosis virus of spodoptera littoralis. the enzyme activity was detected by its ability to degrade the major structural polypeptide of polyhedra (polyhedrin). a quantitative assessment of activity was made by a radioassay technique using (3)h-labeled polyhedrin as the substrate. of the structural components of polyhedra, virus particles showed the greatest specific proteolytic activity. preparations of purified nucleocapsids ...197816789169
analysis of baculovirus genomes with restriction endonucleases.the viral dnas from nine wild-type insect baculoviruses have been isolated and the ecor-1 restriction endonuclease fragment patterns compared. genomic heterogeneity could be detected in the dna restriction patterns of four of these wild-type baculoviruses. three infectious virus forms (two that are occluded in the nucleus and an extracellular virus that has budded from the plasma membrane of infected cells) of a nuclear polyhedrosis virus with multiple nucleocapsids per envelope (mnpv) from the ...197818627885
immunochemical characterization of lymantri dispar npv hemagglutinin: protein-carbohydrate interaction.the agglutination of chicken erythrocytes by lymantria dispar nuclear polyhedrosis virus polyhedrin has been shown to provide specific virus identification. selected mono- and oligosaccharides, present in blood group substances, were assayed by the land-steiner hapten inhibition technique for specific inhibition of polyhedrin hemagglutination. n-acetylgalactosamine and n-acetylglucosamine inhibit to the greatest extent; galactosamine, glucosamine and fucose to a lesser extent. the hapten inhibit ...197822517
gypsy moth cell lines divergent in viral susceptibility. i. culture and identification.a series of cell lines unique in insect virus susceptibility pattern have been isolated from the ovaries of the gypsy moth (lymantria dispar: lepidoptera: lymantriidae) on a synthetic medium with mammalian and avian serum supplementation. growth curves showed the poorest growth occurring on peptone-based media with somewhat better growth on amino-acid-based media. the best growth was obtained with combined media. serological study distinguished the present cell lines from one another and from ce ...197879542
modification of trichoplusia ni nuclear polyhedrosis virus passaged in vivo.a designated strain of plaque-purified trichoplusia ni nuclear polyhedrosis virus (npv) was used to initiate a serial passage series in vivo. the virulence of polyhedra inclusion bodies (pib) and the distribution of mp (many pib) and fp (few pib) strains in hemolymph were monitored. when virus was passaged per os as pib, there was no major change in virulence after 15 passes in insects. plaque analysis of hemolymph from the infected insects indicated that there was no selection for the fp strain ...1978338547
altered phenotypic expression of ultraviolet-irradiated nuclear polyhedrosis virus.uv (254 nm) irradiation of nuclear polyhedrosis virus results in formation of small plaques. the small-plaque effect is reversed by photoreactivation. analysis of plaque formation kinetics indicates a slower formation and subsequent enlargement of plaques from uv-irradiated virus in comparison to non-irradiated virus. a delay in viral dna synthesis is suggested as an explanation for the observed small-plaque effect.1978344266
replication of a nuclear polyhedrosis virus in a continuous cell line of spodoptera frugiperda: partial characterization of the viral dna, comparative dna-dna hybridization, and patterns of dna synthesis. 1978351928
restriction endonuclease analysis to distinguish two closely related nuclear polyhedrosis viruses: autographa californica mnpv and trichoplusia ni mnpv.restriction endonuclease fragment patterns of the deoxyribonucleic acid genomes of autographa californica nuclear polyhedrosis virus (multiply embedded type) and trichoplusia ni nuclear polyhedrosis virus (multiply embedded type) demonstrate that the two viruses are distinct but closely related variants.1978354530
epizootiology of a nuclear polyhedrosis virus in european spruce sawfly (gilpinia hercyniae): the rate of passage of infective virus through the gut of birds during cage tests. 1978355558
immunoperoxidase detection of baculovirus antigens in insect cells.the sequence of events in the infection of tn-368-10 and tn-368-13 cells by autographa californica nuclear polyhedrosis virus (acmnpv) was investigated by using the indirect immunoperoxidase technique. antisera raised against enveloped nucleocapsids detected homologous antigens at 6 to 8 h post infection which was about 2 h before the appearance of both intracellular and extracellular infectious virus. similar tests using polyhedrin antiserum showed that polyhedrin is first synthesized at 12 h p ...1978357682
isolation of genotypic variants of autographa californica nuclear polyhedrosis virus.a nuclear polyhedrosis virus (mnpv) isolated from a lepidopteran (noctuidae) insect, autographa californica, was cloned by successive plaque purification using virions containing only one nucleocapsid per envelope as inoculum. the ability to clone the virus by this method was demonstrated by the isolation of nondefective, genotypic variants of the virus with similar but not identical restriction endonuclease fragment patterns. five distinct variants were identified by genotypic analysis with hin ...1978359831
[size of the genome of the bee wax moth nuclear polyhedrosis virus]. 1978364252
characterization of the dna from four heliothis nuclear polyhedrosis virus isolates. 1978364822
[detection of carriers of latent nuclear polyhedrosis virus in natural populations of the gypsy moth lymantria dispar l. (lepidoptera, family lymantriidae)]. 1977140992
structural studies on the polyhedral inclusion bodies, virions, and dna of the nuclear polyhedrosis virus of the cotton bollworm heliothis zea.the polyhedral inclusion body of the cotton bollworm nuclear polyhedrosis virus contains virions occluded in an orthogonal crystalline matrix. the virions appear as rods or, more frequently, as oval structures that form upon bending of the nucleocapsid within the viral membrane. the nucleocapsid consists at least of dna surrounded by a capsid composed of subunits, possibly helically arranged. the viral dna is circular and supercoiled. it is heterogenous in size with contour lengths ranging from ...1977319251
supercoiled dna of nuclear polyhedrosis virus of galleria mellonella l.supercoiled infectious dna was isolated from nuclear polyhedrosis virus infecting great wax moth galleria mellonella l.) covalently closed dna molecules constitute approximately 10--30 per cent in our preparations. these molecules dissappear during storage. electron micrographs of supercoiled and open circular molecules are presented. length of the open rings is about 50--52 micron. infectivity of different dna forms is discussed.1977322646
a solid-phase radioimmunoassay for polyhedron protein from baculoviruses.a solid-phase radioimmunoassay has been developed for detecting polyhedron protein of wiseana spp. nuclear polyhedrosis virus (w.npv) using antigen fixed to plastic microtiter wells. the direct assay using 125i-labeled rabbit immunoglobulins could detect 0.2 microng of polyhedron protein, and the indirect method using 125i-labeled sheep antirabbit immunoglobulins could detect 0.05 microng of polyhedron protein. antibodies against w.npv polyhedron protein could be detected using a competition ass ...1977323188
envelopment of the nuclear polyhedrosis virus of the oriental tussock moth, euproctis subflava. 1977324116
[dissolution of polyhedra of the nuclear polyhedrosis virus of the leatherjacket tipula paludosa meig. ultrastructural study of the virion (author's transl)].the inclusion bodies of the nuclear polyhedrosis virus of t. paludosa meig. were purified by sucrose density gradients, their morphology described using scanning electron microscopy, and the conditions for their solubilization investigated. these inclusions known to be unusually resistant to dissolution, were successfully dissolved in conditions maintaining the integrety of the virus particles by using a 0.125 m sodium thioglycolate + 0.125 m sodium bicarbonate solution, ph 10.5. the virions ext ...1977324439
cytoplasmic budding of a nuclear polyhedrosis virus and comparative ultrastructural studies of envelopes. 1977329061
autographa californica nuclear polyhedrosis virus: comparative infectivity of the occluded, alkali-liberated, and nonoccluded forms. 1977336795
characterization and serology of the matrix protein from a nuclear-polyhedrosis virus of trichoplusia ni before and after degradation by an endogenous proteinase.the intact matrix protein from a nuclear-polyhedrosis virus of the cabbage looper (trichoplusia ni), isolated after inhibition of an endogenous serine-type proteinase, was further purified by molecular-sieve chromatography. the matrix protein was associated with carbohydrate moieties, and the carbohydrate content was determined for the two major peptides isolated after proteolysis by the endogenous proteinase. the association-dissociation interactions of the intact and proteinase-hydrolysed mono ...197723107
purification of free polyhedrosis virus infecting galleria mellonella l.free galleria mellonella nuclear polyhedrosis virus was purified 4000--4500 times by tween-80 treatment and repeated sucrose density gradient centrifugation, based on the ratio of infectivity to protein content as compared to the starting virus-containing suspension.197717285
serological studies on virions and polyhedron protein of a nuclear polyhedrosis virus of the cabbage looper, trichoplusia ni. 1977404757
effect of alkaline protease on the antigenic nature of wiseana nuclear polyhedrosis virus polyhedron protein.polyhedron protein from wiseana spp. nuclear polyhedrosis virus was found to be degraded by an alkali protease when polyhedra are dissolved in alkali. the protease activity did not occur at high ph (0.1 m naoh) and was inactivated by heating polyhedra to 70 degrees c for 3 h. the products from the protease degradation of wiseana spp. nuclear polyhedrosis virus polyhedron protein retain the antigenicity of undegraded polyhedron protein as measured by the direct solid-phase radioimmunoassay and im ...197716789167
strain selection during serial passage of trichoplusia in nuclear polyhedrosis virus.two strains of a nuclear polyhedrosis virus (npv) of trichoplusia ni were isolated on the basis of plaque morphology. they are designated as mp (having greater than 30 polyhedra per nucleus) and fp (having fewer than 10 polyhedra per nucleus). serial, undiluted passage of plaque, purified mp nonoccluded. virus (nov) in tissue culture led to the production of the fp phenotype detectable at passage 9. with continued serial, undiluted passage, fp became the predominant strain. comparative growth cu ...1976775129
[trypsin peptides of the polyhedral protein from the b. mori virus of nuclear polyhedrosis].amino acid composition, partial or complete sequence of 43 tryptic peptides of pelyhedral protein of nuclear polyhedrosis virus is investigated. these peptides include 327 amino acid residues. there are 28 peptides with unique sequences containing 240 amino acid residues. it conforms to polypeptide chain molecular weight ca. 28000 and coincides with earlier reported data on polyacrylamide gel electrophoresis.1976776233
comparative ultrastructural studies of insect granulosis and nuclear polyhedrosis viruses.optical diffraction studies indicated that the periodic lattice structure in electron micrographs of the capsids of two granulosis and two nuclear polyhedrosis viruses were indistinguishable. the capsid is composed of stacked rings spaced 4-5 nm apart. comparison of the intracellular forms of bombyx mori nuclear polyhedrosis virus with negatively stained virus particles leads to encourage the more general use of the term 'capsid' instead of 'intimate membrane' and the term 'virus membrane' in pl ...1976778335
[activation of the latent nuclear polyhedrosis virus in a natural population of hawthorn white (aporia crataegi l.) caterpillar by treating apple leaves with double superphosphate]. 1976781490
occluded and nonoccluded nuclear polyhedrosis virus grown in trichoplusia ni: comparative neutralization comparative infectivity, and in vitro growth studies.nuclear polyhedrosis virus infections of lepidopteran cells often result in the production of both occluded and nonoccluded virus. the characterization of these two different forms has been the subject of several papers. we have divided the nonoccluded virus (nov) category further into plasma membrane-budded non-occluded virus (pmb-nov), intracellular nov, and hemolymph-derived nov, and have done additional studies investigating the differences between these nonoccluded forms and the alkali-libe ...1976787558
nuclear polyhedrosis virus replication in permanent cell lines of the cabbage moth (mamestra brassicae l.). 1976787805
[possible outside root application of inorganic fertilizers activating latent nuclear polyhedrosis virus to apple trees for aporia crataegi l. (lepidoptera: pieridae) control]. 1976794643
[multiplication of the nuclear polyhedrosis virus of the honeycomb moth in gypsy moth cell cultures]. 1976796635
[isolation and characteristics of fragments from the cyanogen bromide splitting of inclusion body proteins of bombyx mori nuclear polyhedrosis virus].the cyanogen bromide cleavage of "acetic" polyhedral protein from nuclear polyhedrosis virus of b. mori was performed. two peptides brcn-ii and brcn-ii' which consist of 29 and 34 amino acid residue were isolated from a mixture of cyanogen bromide fragments. the amino acid composition and n-terminal amino acids were established. the tryptic proteolysis of these fragments was conducted and the tryptic peptides were separated. the amino acid composition of tryptic peptides was determined. the data ...1976797077
[fractionation and amino-acid composition of acid-soluble trypsin of inclusion bodies protein of nuclear polyhedrosis virus of moth, galleria mellonella].a mixture of ph 3.5-soluble trypsin peptides of inclusion bodies proteins of moth nuclear polyedrosis virus was fractionated by means of ionic exchange chromatography on dowex 50x2 and purified by paper electrophoresis-chromatography. 32 peptides are isolated, their amino acid composition being studied.1976799518
the effects of inhibitors of nucleic acid and protein synthesis on the replication of spodoptera frugiperda nuclear polyhedrosis virus in cultured spodoptera frugiperda cells.the effects of inhibitors of nucleic acid and protein synthesis on the replication of spodoptera frugiperda nuclear polyhedrosis virus have been determined. two inhibitors of protein synthesis-cycloheximide and puromycin-were irreversible inhibitors of virus multiplication. three inhibitors of nucleic acid synthesis-actinomycin d, cytosine arabinoside and camptothecin- prevented virus multiplication; only camptothecin was reversible. rifampicin had no effect on virus multiplication.1976799627
[secondary structure of the polyhedral protein of the nuclear polyhedrosis virus of bombyx mori and some of its fragments].the secondary structure of polyhedral protein of the nuclear polyhedrosis virus of bombyx mori and some of its fragments has been investigated by circular dichroism and optical rotatory dispersion. it has been shown that the protein contains 6% alpha-helices and 26% beta-structures at ph 10.5. the conversion of beta-pleated sheets to alpha-helices after the treatment with sodium dodecyl sulfate was observed. a correlation between the number of alpha-helices in the fragment brcn-v and its ability ...1976802784
evaluation of heliothis nuclear polyhedrosis virus in a cottonseed oil bait for control of heliothis virescens and h. zea on cotton. 19751089686
serial passage of a nuclear polyhedrosis virus of the silkworm, bombyx mori, in larvae of rice stem borer, chilo suppressalis. 19751089731
a nuclear polyhedrosis virus of bellura gortynoides (lepidoptera: noctuidae). 19751089732
effect of a nuclear polyhedrosis virus on the realtionship between trichoplusia ni (lepidoptera: noctuidae) and the parasite, hyposoter exiguae (hymenoptera: ichneumonidae). 19751089733
ultraviolet light activation of insect nuclear polyhedrosis virus. 19751089898
serological relationship of nuclear polyhedrosis viruses. i. hemagglutination by polyhedral inclusion body protein from the nuclear polyhedrosis virus of porthetria (equal to lymantria) dispar. 19751090680
studies on the arrangement patterns of nucleocapsids within the envelopes of nuclear-polyhedrosis virus in the fat-body cells of the brown tail moth, euproctis similis. 19751097536
in vitro cultivation of testicular cysts of the greater wax moth and multiplication of the associated nuclear polyhedrosis virus. 19751097537
invasion of a nuclear polyhedrosis virus in midgut of the armyworm, pseudaletia unipuncta, and the enhancement of a synergistic enzyme. 19751097539
isolation of a cytoplasmic polyhedrosis virus by physical and immunological techniques.procedures are described for the separation and purification of cytoplasmic polyhedrosis viruses obtained from multiply infected heliothis armigera larvae. separation was achieved by differential centrifugation and density gradient zone electrophoresis followed by complexing with nuclear polyhedrosis virus specific antibody. the yield of cytoplasmic polyhedrosis virus was increased by passage in larvae reared on synthetic media.19751098037
purification and properties of a nuclear polyhedrosis virus from choristoneura fumiferana.the polyhedral inclusion bodies of a nuclear polyhedrosis virus from the spruce budworm choristoneura fumiferana were purified by fluorocarbon treatment, sucrose columns, sucrose density gradients, and equilibrium centrifugation. the preparation yields a single and homogeneous band in potassium tartrate gradients at a density of 1.193 g/ml. the virions were released from the polyhedra by alkali treatment and purified by either rate zonal or equilibrium centrifugation in sucrose gradients. the pu ...19751100209
degradation of matrix protein from a nuclear-polyhedrosis virus of trichoplusia ni by an endogenous protease. 19751103444
nuclear polyhedrosis virus detection: relative capabilities of clones developed from trichoplusia ni ovarian cell line tn-368 to serve as indicator cells in a plaque assay.cloned cell lines from the established trichoplusia ni line tn-368 appear to differ from one another in their relative capabilities to serve as plaque assay indicator cell lines for autographa californica nuclear polyhedrosis virus. although there seems to be little correlation between their relative generation times and their efficiency in supporting plaque formation as indicator cell lines, there does seem to be a relationship within a given line between its capability to serve as an indicator ...19751104895
replication of nuclear polyhedrosis virus in a continuous cell culture of spodoptera frugiperda: microscopy study of the sequence of events of the virus infection.a microscopy study of the sequence of morphogenic events of spodoptera frugiperda nuclear polyhedrosis virus infection of s. frugiperda cells is presented which orders the sequence of replication and establishes the time scale within which the events occur. the virus entered the cell by 1 h postinfection and was uncoated. the eclipse period was 9 h and the latent period was 12 h. polyhedron formation was detected by 18 h postinfection and continued until the deposition of the polyhedron membrane ...19751107597
comparative studies of baculovirus granulins and polyhedrins.granulins and polyhedrins from five baculoviruses exhibit similar chemical and physical properties. although similarities are demonstrated, it has been shown that each of the proteins is different and apparently specific to a given virus. the granulins and polyhedrins exhibit a major polypeptide component of an estimated molecular weight of 28,000. alkaline protease activity has been detected in each preparation. n-terminal analyses reflect differences between granulins and polyhedrins studied: ...1975786939
characteristics of the non-occluded form of a nuclear polyhedrosis virus.non-occluded virions of a nuclear polyhedrosis virus of the alfalfa looper, autographa californica, found in the medium of cell cultures of infected fall armyworm, spodopter frugiperda, and in the hemolymph of infected s. frugiperda larvae were partially characterized by biological, chemical and physical methods. also, the rate of appearance of the virions was studied in cell culture and the host insect to determine maximum virion production. virions obtained from both sources were heat-sensitiv ...1975343
interaction of bacillus thuringiensis and nuclear polyhedrosis virus in spodoptera exigua. 1975773648
mode of transmission of nuclear-polyhedrosis virus to progeny of adult heliothis zea. 19744604783
differential susceptibility of parasitized and nonparasitized larvae of trichoplusia ni to a nuclear polyhedrosis virus. 19744606436
highly infectious free virions in the hemolymph of the silkworm (bombyx mori) infected with a nuclear polyhedrosis virus. 19744606615
replication of a nuclear polyhedrosis virus in a continuous cell culture of spodoptera frugiperda: purification, assay of infectivity, and growth characteristics of the virus.nonoccluded virus, polyhedra, and occluded virus were purified from a continuous cell culture of spodopera frugiperda infected with nuclear polyhedrosis virus. the optimal temperature for the replication and lateral transmission of infectivity for the nuclear polyhedrosis viruses (npv) in cell culture was 27 c. end-point dilution and plaque assay procedures for the measurement of infectivity are described and compared. dose-response data demonstrated that a single particle could initiate an infe ...19744608299
susceptibility of larvae of the army worm, pseudaletia separata walker, (lepidoptera: noctuidae) to various doses of its nuclear polyhedrosis virus. 19744611910
[structure of the nuclear polyhedrosis virus of the mulberry silkworm, bombyx mori]. 19744612992
an enzootic nuclear polyhedrosis virus of pink shrimp: ultrastructure, prevalence, and enhancement. 19744613755
infection of the hickory tussock moth, halisidota caryae, by a nuclear-polyhedrosis virus of autographa californica grown in trichoplusia in cell cultures. 19744613756
two isolates of a nuclear-polyhedrosis virus of the brown tail moth euproctis similis, exhibiting different inclusion body shapes. 19744613757
[adaptation of the apple moth nuclear polyhedrosis virus to a new host]. 19744614622
morphogenesis of nuclear polyhedrosis virus under conditions of prolonged passage in vitro. 19744616102
some biophysical properties of virus present in tissue cultures infected with the nuclear polyhedrosis virus of trichoplusia ni. 19744617765
electrophoresis of the proteins of the nuclear polyhedrosis virus of porthetria dispar. 19744619113
bioassay of a nuclear-polyhedrosis virus and bacillus thuringiensis against the american bollworm, heliothis armigera, in botswana. 19744597764
some genetic aspects of the resistance of spodoptera frugiperda to a nuclear polyhedrosis virus. 19744597766
weight-related susceptibility of larvae of heliothis armigera to a crude nuclear-polyhedrosis virus preparation. 19744597767
interaction of campoletis sonorensis and a nuclear polyhedrosis virus in larvae of heliothis virescens. 19744598666
studies on a nuclear polyhedrosis virus in bombyx mori cells in vitro. 1. multiplication kinetics and ultrastructural studies. 19744600202
electron microscope examination of two plaque variants from a nuclear polyhedrosis virus of the alfalfa looper, autographa californica. 19744596522
[activation of latent nuclear polyhedrosis virus in the caterpillars of the lackey moth malacosoma neustria l]. 19734597151
[distribution and amino acid makeup of the tryptic peptides of the inclusion body protein of the nuclear polyhedrosis virus of the mulberry silkworm, bombyx mori]. 19734601319
characterization of nuclear polyhedrosis virus dnas.the nuclear polyhedrosis virus dnas characterized and compared in this study consist of the singly-enveloped nucleocapsids (snpv) of trichoplusia ni and the bundles of nucleocapsids common to a single envelope (mnpv) from spodoptera frugiperda and rachiplusia ou. the snpv and mnpv dnas are very similar in hydrodynamic properties and molecular weights. in addition, the npv dnas are similar in size to those extracted from the granulosis viruses that infect t. ni and s. frugiperda. as isolated from ...19734761726
[study of the effect of nickel sulfate on the reproduction of the nuclear polyhedrosis virus in cultured insect cells]. 19734779964
isolation of a factor, from the capsule of a granulosis virus, synergistic for a nuclear-polyhedrosis virus of the armyworm. 19734570378
[determination of the molecular weight of the protein of the inclusion bodies of the nuclear polyhedrosis virus of the silkworm bombyx mori]. 19734592475
[fractionation of fragments, obtained by cleavage with cyanogen bromide of inclusion body protein of silkworm nuclear polyhedrosis virus]. 19724643738
macromolecular structure of the dna of the bombyx nuclear polyhedrosis virus. 19724566638
[electron microscopic study of the structure of the nuclear polyhedrosis virus in bombyx mori]. 19725077238
effect of nuclear polyhedrosis virus infection on polyribosome content of gypsy moth larvae (porthetria dispar). 19725080789
activity of the nuclear-polyhedrosis virus of the cabbage looper evaluated at programmed temperature regimens. 19715092834
the effect of sunlight, ultraviolet and gamma radiations, and temperature on the infectivity of a nuclear polyhedrosis virus. 19715092850
the amount of potassium and sulfur in healthy and nuclear polyhedrosis virus-infected larvae of galleria mellonella. 19715092851
field tests for control of heliothis spp. with a nuclear polyhedrosis virus included in a boll weevil bait. 19715092854
infective hemolymph from forest tent caterpillars diseased by nuclear polyhedrosis virus. 19715103514
[dimers of the nuclear polyhedrosis virus of b. mori]. 19715137546
observations on the nature of the carbonate dissolution process on inclusion bodies of a nuclear polyhedrosis virus of pseudaletia unipuncta. 19715151910
[electron microscopic study of the effect of subcritical temperatures on the dna of the nuclear polyhedrosis virus of bombyx mori]. 19715153988
observations on the polyhedra and virions of the cabbage looper nuclear polyhedrosis virus, with special reference to the viral membranes. 19714100958
an ultrastructural study of the development of a nuclear polyhedrosis virus of the eastern hemlock looper, lambdina fiscellaria fiscellaria. 19714101993
electron microscopy of nuclear polyhedrosis virus from agrotis segetum schiff. and a. exclamationis l. (lepidoptera, noctuidae). 19714102572
separation and structure of components of nuclear polyhedrosis virus of the silkworm.morphology of structural components of nuclear polyhedrosis virus (npv) particles of the silkworm (bombyx mori linné) was studied by electron microscope using negative staining. npv particles isolated from polyhedra could be separated into five structural components by centrifugation in sucrose density gradients. the lowest band (band i) was found to consist of thick rod-shaped particles (330 by 80 nm) with knobby surfaces and with occasional protrusion at one end. the second band from the botto ...19714106781
cell infection by a nuclear polyhedrosis virus. 19704099067
inhalation and dermal allergenicity studies of a nuclear-polyhedrosis virus of heliothis zea in guinea pigs. 19705435794
toxicity-pathogenicity studies of a nuclear-polyhedrosis virus of heliothis zea in white mice. 19705442844
long-term feeding and other toxicity-pathogenicity studies on rats using a commercial preparation of the nuclear-polyhedrosis virus of heliothis zea. 19705449736
immunoelectrophoresis of hemolymph of the cabbage looper, trichopusia ni, during the course of a nuclear polyhedrosis virus infection. 19705449741
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