| biocidal activity of three wood essential oils against ixodes scapularis (acari: ixodidae), xenopsylla cheopis (siphonaptera: pulicidae), and aedes aegypti (diptera: culicidae). | the biocidal activity of three steam distilled wood essential oils-incense cedar, calocedrus decurrens (torr.) florin; port-orford-cedar, chamaecyparis lawsoniana (a. murr.) parl.; and western juniper, juniperus occidentalis (hook)--were evaluated against adult aedes aegypti (l.) (diptera: culicidae) and xenopsylla cheopis (rothchild) (siphonaptera: pulicidae) and nymphal ixodes scapularis say (acari: ixodidae). in vitro laboratory bioassays were conducted to establish baseline dose-mortality da ... | 2007 | 17461093 |
| identification of a locus modifying the electrophoretic mobility of malate dehydrogenase isozymes in incense-cedar (calocedrus decurrens), and its implications for population studies. | using megagametophyte (maternal haploid) and embryo (diploid) tissues of incense-cedar seeds, the expression of one of three malate dehydrogenase (mdh) loci was found to be influenced by a second, unlinked, modifier locus. whereas alleles of the affected structural locus are codominant, the modifier alleles show dominance. the action of the modifier, limited to 1 of 28 structural loci examined, results in a shift of electrophoretic mobility detectable in conventional starch gels. both the struct ... | 1983 | 6870770 |
| inheritance and linkage of isozyme variants in incense-cedar. | isozymes extracted from seed of incense-cedar (calocedrus decurrens [torr.] florin) are described. these isozymes appear to be encoded by 27 loci; allelic variants are identified for 25 loci. three pairs of loci appear to be linked: alpha est:fest, with a recombination frequency (rf) of 0.02-0.06; got3:mdh 1, with an rf of 0.10-0.19; and got2:pgi2, with an rf of 0.02-0.11. the latter linkage has been described for several taxa within the pinaceae; it may represent an ancient arrangement predatin ... | 2010 | 3760538 |
| antibodies to pollen exines. | a polyclonal antiserum and monoclonal antibodies have been prepared to purified pollen exines of calocedrus decurrens florin. the location of the antigen is in the exine, as shown by light-and electron-microscopic immunocytochemistry. the greatest reduction in antibody binding follows treatment of the exine with chemicals known to alter sporopollenin. these results provide evidence that sporopollenin is antigenic. exines of ten species of gymnosperms and angiosperms also bound the polyclonal ant ... | 1988 | 24220944 |
| chloroplast dna restriction fragment length polymorphism in sequoia sempervirens d. don endl., pseudotsuga menziesii (mirb.) franco, calocedrus decurrens (torr.), and pinus taeda l. | the extent and type of chloroplast dna restriction fragment length polymorphism was determined among individual tree samples of coast redwood, douglas fir, incense-cedar, and loblolly pine. a total of 107 trees was surveyed for three restriction enzymes (bamhi, ecori, hindiii) and six chloroplast dna probes from petunia (p3, p4, p6, p8, p10, s8). the probes comprise 64% of the petunia chloroplast genome. polymorphisms were detected in all species but loblolly pine. coast redwood and incense-ceda ... | 1991 | 24221163 |
| analysis of shoot apical organization in six species of the cupressaceae based on chimeric behavior. | six species of the cupressaceae, the variegated leyland cypress (cupressocyparis leylandii 'silver dust'), savin (juniperus sabina variegata laws), davurian juniper (juniperus davurica 'expansa variegata'), california incense cedar (calocedrus decurrens 'aureovariegata'), the american arbor vitae (thuja occidentalis 'lutae zebrina' kent), and the sawara false cypress (chamaecyparis pisifera 'nana aureovariegata') were examined for the behavior of albino-green shoot chimeras. the fate of the vari ... | 2001 | 21669627 |
| ige-mediated allergic rhinitis and conjunctivitis caused by calocedrus decurrens (incense cedar). | | 2003 | 14616140 |
| mode of action for natural products isolated from essential oils of two trees is different from available mosquito adulticides. | insecticidal properties of natural products may present alternatives to the use of synthetic molecule pesticides that are of diminishing effectiveness due to resistance. three compounds, thymoquinone, nootkatone, and carvacrol, components of alaska yellow cedar, chamaecyyparis nootkatensis (d. don) spach, and incense cedar, calocedrus decurrens (torr.), essential oils, have been shown to have biological activity against a variety of mosquito and tick species. although these components act as bot ... | 2010 | 21175062 |
| spatial elements of mortality risk in old-growth forests. | for many species of long-lived organisms, such as trees, survival appears to be the most critical vital rate affecting population persistence. however, methods commonly used to quantify tree death, such as relating tree mortality risk solely to diameter growth, almost certainly do not account for important spatial processes. our goal in this study was to detect and, if present, to quantify the relevance of such processes. for this purpose, we examined purely spatial aspects of mortality for four ... | 2008 | 18589538 |
| discovery and development of anticancer agents from plants. | a novel in vitro assay for the discovery of anticancer agents was used to examine aqueous and organic extracts from 1847 plants collected mainly in the u.s. southwest and west. the assay results were separated into 5 categories: inactive (62%), equally active (36%), equally active and potent (0.5%), solid tumor selective (1.4%), and human selective (0.8%). extracts from the latter three categories were fractionated using the in vitro assay to biodirect each step. psorothamnus emoryi extracts wer ... | 2002 | 12416027 |
| mediterranean climate effects. i. conifer water use across a sierra nevada ecotone. | xylem water potential of the midelevation conifers pinus jeffreyi, pinus lambertiana, abies concolor, and calocedrus decurrens, the higher elevation pinus monticola and abies magnifica, and co-occurring evergreen angiosperm shrubs, together with soil moisture under these plants, were monitored at three sites on the kern plateau in the southernmost sierra nevada range of california: site locations spanned the ecotone between the mid- and upper montane forests at elevations of 2230-2820 m. measure ... | 2001 | 11353716 |
| environmental source of mycobacteriosis in a california swine herd. | between july 1985 and april 1986, mycobacterial lymphadenitis was recorded in six of 2407 slaughter pigs from a commercial swine herd in which the majority of pigs were raised in confinement. records showed that all six affected pigs had access to dirt-floored pens at least 81 days prior to slaughter. the mycobacteriosis lesion rate for pigs exposed to dirt pens was 9.4% while in nonexposed pigs the lesion rate was zero. the risk associated with movement of pigs from concrete floored pens to dir ... | 1989 | 2914225 |
| mapped dna probes from loblolly pine can be used for restriction fragment length polymorphism mapping in other conifers. | a high-density genetic map based on restriction fragment length polymorphisms (rflps) is being constructed for loblolly pine (pinus taeda l.). consequently, a large number of dna probes from loblolly pine are potentially available for use in other species. we have used some of these dna probes to detect rflps in 12 conifers and an angiosperm. thirty complementary dna and two genomic dna probes from loblolly pine were hybridized to southern blots containing dna from five species of pinus (p. elli ... | 1994 | 24186006 |