解剖学和形态学
麻醉学
听力与言语-语言病理学
行为科学
心脏和心血管系统
细胞和组织工程学
临床神经病学
危重症监护医学
牙科,口腔外科和医学
皮肤病学
急诊医学
内分泌学和新陈代谢
肠胃学和肝脏学
老人病学和老年医学
卫生保健科学和服务
血液学
免疫学
传染病
综合和补充性医学
医学伦理学
医学信息学
医学实验室技术
医学,全科和内科
医学,法律
医学,研究和试验
神经系统科学
护理
营养学和饮食学
产科医学和妇科医学
肿瘤学
眼科学
整形外科学
耳鼻喉科学
病理学
儿科学
周围血管疾病
药理学和药剂学
生理学
基本医疗保健
精神病学
公共、环境和职业卫生
放射学,核医学和医学成像
康复学
生殖生物学
呼吸系统
风湿病学
运动科学
外科学
毒理学
热带医学
泌尿学和肾脏学
病毒学
老年医学
健康政策和服务
心理学,临床
abstract::Hydroxydanaidal, the corematal courtship pheromone of maleUtetheisa ornatrix, shows pronounced quantitative variation in natural populations of the moth. Males that, as larvae, fed on seed-bearing rather than immature food plants (Crotalaria spectabilis orC. mucronata) produce higher levels of hydroxydanaidal. Such ma...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01021785
更新日期:1990-02-01 00:00:00
abstract::Bacteria swim by rotating semirigid, left-handed helical flagellar filaments; counterclockwise (CCW) rotation produces straight swims, known as "runs," and clockwise (CW) rotation generates abrupt changes in direction, known as "tumbles." As a cell moves through its environment, alternately running and tumbling, it de...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01021272
更新日期:1990-01-01 00:00:00
abstract::We investigated the potential role of defensive chemicals in the avoidance of watercress (Nasturtium officinale) by the cooccurring amphipod,Gammarus pseudolimnaeus at two spring brooks: Carp Creek, Michigan and Squabble Brook, Connecticut. We conducted observations and laboratory experiments on the consumption of wat...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01021282
更新日期:1990-01-01 00:00:00
abstract::The foliage and fruit of the tomato plantLycopersicon esculentum contains polyphenol oxidases (PPO) and peroxidases (POD) that are compartmentally separated from orthodihydroxyphenolic substrates in situ. However, when leaf tissue is damaged by insect feeding, the enzyme and phenolic substrates come in contact, result...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01014725
更新日期:1989-12-01 00:00:00
abstract::Males of several species ofMyrmecocystus produce mandibular gland secretions that contain 2,4-dimethyl-2-hexenoic acid and a variety of monoterpenes that include neral, geranial, citronellol, limonene, and 2,6-dimethyl-5-hepten-1-ol. Other components identified include methyl anthranilate, octanal, octanol, octyl octa...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01014734
更新日期:1989-11-01 00:00:00
abstract::The analyses of virgin female sex pheromone gland extracts by gas chromatography (GC), GC-electroantennographic detection (GC-EAD) and GC-mass spectrometry (GC-MS) followed by field-trapping experiments, have identified (E)-9-tetradecenyl acetate (E9-14:Ac) as the primary sex pheromone component of the spruce budmoth,...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01020374
更新日期:1989-10-01 00:00:00
abstract::All possible isomeric mono-methylpentacosanes as well as 2,6-, 2,8-, 2,10-, 2,12-, and 2,14-dimethylheptacosane were synthesized. The [(13)C]NMR shifts and the Kovats indices were determined, and the relationship to separation of isomeric mixtures of insect cuticular waxes are discussed. When several homologous series...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01012084
更新日期:1989-09-01 00:00:00
abstract::Chemical investigation of the Dufour gland contents of three species ofMyrmecia by GC and GC-MS showed thatM. gulosa andM. nigriceps contain predominantly linear hydrocarbons, whereasM. pilosula contains acetates, aldehydes, and propionates. The major components ofM. gulosa andM. nigriceps are (Z)-8-heptadecene, penta...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01014109
更新日期:1989-08-01 00:00:00
abstract::2,4-Dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), the major hydroxamic acid present in corn, and its tritiated derivative, were prepared synthetically for use in the determination of the toxicokinetics of this insect deterrent in the European corn borer (ECB),Ostrinia nubilalis. In growth studies with DIMBOA (0, ...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01207432
更新日期:1989-07-01 00:00:00
abstract::Heritable cuticular hydrocarbon patterns ofSolenopsis invicta workers are consistent within colonies for a given sampling time but vary sufficiently from colony to colony to distinguish the colonies from each other. In addition, cuticular hydrocarbon patterns change within colonies over time. Nestmate recognition cues...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01207442
更新日期:1989-07-01 00:00:00
abstract::The kinetics of the release of gossyplure, measured in the laboratory at 34.5 ± 0.5 °C, from two liquid flowable formulations are presented and discussed. The data indicate that liquid flowable formulations, defined as those formulations where the active ingredient (in this case gossyplure) is attached to a particulat...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01012264
更新日期:1989-06-01 00:00:00
abstract::Roots of the carrot cultivars Vertou L.D. (resistant) and Long Chantenay (susceptible) were subjected to detailed chemical analysis to identify extracts and compounds influencing larval host-finding (preference/non-preference) behavior and to compare concentrations of these compounds in resistant and susceptible culti...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01012274
更新日期:1989-06-01 00:00:00
abstract::Dendroctonus ponderosae Hopkins andIps paraconfusus Lanier of both sexes produced most of their complement of terpene alcohols at normal to elevated levels in the absence of readily culturable microorganisms. However, there was some evidence that microbial involvement may be required by maleI. paraconfusus to produce ...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01012375
更新日期:1989-05-01 00:00:00
abstract::The concentration of leaf mono- and sesquiterpenes is greater in nitrate-limited than in nitrate-richHeterotheca subaxillaris plants and is highest in young leaves and declines with leaf age. To determine whether rates of volatile terpene synthesis and/or loss vary with nitrate availability and leaf age, incorporation...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01012385
更新日期:1989-05-01 00:00:00
abstract::Synthetic pheromone was released from a dispenser stretched across the width of a wind tunnel. Beetles in pheromone-free wind wandered in all directions and did not appear to orient to the wind. A dosage series showed that pheromone decreased the walking rate and deviations from the upwind direction, and it increased ...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01014818
更新日期:1989-04-01 00:00:00
abstract::Analysis of ovipositor extracts of lab-reared (> 120 generations) and wildHeliothis zea indicated small but significant differences in the percent composition of the four aldehyde components of the sex pheromone. (Z)-11-hexadecen-1-ol (Z11-16∶OH) was present in both populations and amounted to only 2.8% of the total p...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01014828
更新日期:1989-04-01 00:00:00
abstract::Acrolepiopsis assectella andPlutella xylostella frass volatiles, trapped on Tenax GC, were examined by capillary gas chromatography. In both moths, the same three disulfides, dimethyl, dipropyl, and methyl propyl, were the most abundant substances, but in different proportions. The synthetic disulfides elicited the sa...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01014838
更新日期:1989-04-01 00:00:00
abstract::Hypericin, an anthrone dimer inHypericum perforatum (Guttiferae), is shown for the first time to be phototoxic to generalist lepidopteran larvae; survivorship was reduced and development prolonged forHeliothis zea (Noctuidae) andPlatynota flavedana (Tortricidae) that consumed hypericin diets in the presence of light. ...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01015183
更新日期:1989-03-01 00:00:00
abstract::The suitability of the Bradford protein assay for measuring plant protein was evaluated and a standard method developed. The assay involves extraction of dried, fresh, or frozen plant material in 0.1 NaOH for 30 min. Replicate 100-μl aliquots of centrifuged supernatant are assayed with 5 ml Bio-Rad Bradford dye reagen...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01015193
更新日期:1989-03-01 00:00:00
abstract::Two components, (Z)-5- and (Z)-7-tetradecenyl acetates, in the sex pheromone gland of aPlanotortrix excessana sibling species, were found to vary continuously from a ratio of 3∶97 to 71∶29 in individual female moths reared from wild larvae collected around New Zealand. Two laboratory colonies were established from pop...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01014692
更新日期:1989-02-01 00:00:00
abstract::The sex pheromone ofCydia toreuta (Grote), the eastern pine seedworm, was investigated using electroantennogram (AG) measurements, gas chromatography (combined GC-FID-EAD) measurements, and field tests. (E,Z)-8,10-dodecadienyl acetate (E,Z8,10-12:Ac) and (E,E)-8,10-dodecadienyl actetate (E,E8,10-12: Ac) produced both ...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01014702
更新日期:1989-02-01 00:00:00
abstract::The alkaloids solanine and tomatine and the polyene antibiotic nystatin were tested in vitro against the entomopathogenic fungusBeauveria bassiana. Nystatin was the most inhibitory compound tested, reducing colony formation, growth, and development of conidiaphores to a greater degree and at lower concentrations than ...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01014712
更新日期:1989-02-01 00:00:00
abstract::Calling behavior and pheromone emission by virgin femaleE. loftini moths were investigated in laboratory experiments. Calling peaked during the last three hours of the night. Three-day-old moths called more than older or younger moths and began calling earlier in the night than younger moths. Female emissions were col...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF02027777
更新日期:1989-01-01 00:00:00
abstract::Investigation of the lipid extract of the Australian chrysomelid beetle,Monolepta australis, has revealed a novel homologous series of long-chain, unsaturated-saturated dialkyl ethers in the cuticular wax. Gas chromatography-mass spectrometry, proton magnetic resonance, infrared spectroscopy, and chemical degradation ...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF02027787
更新日期:1989-01-01 00:00:00
abstract::The role of intracellular symbionts contributing to their host has been investigated in the planthoppers,Nilaparvata lugens Stal andLaodelphax striatellus Fallen. We have found that the isolated yeastlike symbionts, identified as a member of the genusCandida, from the host's egg produce ergosterol when cultured. A com...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF02027797
更新日期:1989-01-01 00:00:00
abstract::Information processing in the olfactory pathway underlying the perception of semiochemicals by insects is discussed. Both the chemical message for mates and the message for food consist of blends of chemicals. Olfactory receptors in an insect species are tuned to the detection of those compounds which comprise such ch...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01014246
更新日期:1988-11-01 00:00:00
abstract::Epoxide hydrolase catalyzes a simple hydrolysis of reactive cyclic ethers that may otherwise alkylate and impair critical proteins and nucleic acids required for life. Although much less studied than the cytochrome P-450 monooxygenases that produce epoxides, differences in subcellular, tissue, pH, substrate, and inhib...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01013483
更新日期:1988-10-01 00:00:00
abstract::The morphology and chemical content analysis of Hagen's glands of the braconid waspsBiosteres longicaudatus, B. tryoni, andB. arisanus were shown to be useful taxonomic markers.B. longicaudatus glands contain two components tentatively identified as (3aα,5β,6aα)-5-butyltetrahydro-furo[3,2-b]furan-2(3H)-one and a corre...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01014640
更新日期:1988-09-01 00:00:00
abstract::The biological activity of aqueous extracts of velvetleaf (Abutilon theophrasti Medik.) seed coats and their flavonoid components against three plant species and five soil fungi was investigated. Aqueous extracts slightly inhibited germination and significantly inhibited radicle growth of all plant species tested. Fun...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01012523
更新日期:1988-07-01 00:00:00
abstract::Factors eliciting copulatory behavior in mature maleHylobius abietis were studied in the laboratory. Dead female weevils were sexually attractive, while dead mature males and pentane-extracted female weevils were not. The sexual attractiveness of dead females declined with time after death. Pentane extracts of whole f...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01012421
更新日期:1988-06-01 00:00:00
abstract::The analyses of virgin female sex pheromone gland extracts and gland volatiles by GC, GC-EAD and GC-MS, followed by field trapping experiments, have identified (E)-9-dodecenyl acetate (E9-12∶Ac) as the primary sex pheromone component of the purplestriped shootworm,Zeiraphera unfortunana. Dosages of 1.0-10.0 μg ofE9-12...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01020145
更新日期:1988-05-01 00:00:00
abstract::Chromatographic fractions of Himalayan cedarwood oil (Cedrus deodara) were bioassayed against the pulse beetle (Callosobruchus analis F.) and the housefly (Musca domestica L.). Almost all fractions showed insecticidal activity against both test species. Fractions I and V led to the highest mortality and also produced ...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01019342
更新日期:1988-04-01 00:00:00
abstract::Glutathione transferase activity towards various plant isothiocyanates was studied in larvae of the two generalists, fall armyworm [Spodoptera frugiperda (J.E. Smith)], and cabbage looper [Trichoplusia ni (Hübner)], and the specialist, velvetbean caterpillar (Anticarsia gemmatalis Hübner) using the midgut soluble frac...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01019352
更新日期:1988-04-01 00:00:00
abstract::We used a detailed analysis of feeding behavior to investigate the role of solanaceous alkaloids as sensory-based feeding deterrents for the Colorado potato beetle,Leptinotarsa decemlineata (Say). Experiments were conducted on three geographic, host-adapted populations of beetles to determine whether evolutionary chan...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01018772
更新日期:1988-03-01 00:00:00
abstract::Sex pheromone biosynthesis in the codling mothCydia pomonella (Lepidoptera; Tortricidae) was studied by topical application of deuterated fatty acids in DMSO to pheromone glands. The incorporation of deuterium label into fatty acids and alcohols in the pheromone gland was monitored by gas chromatography with flame ion...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01018782
更新日期:1988-03-01 00:00:00
abstract::The iridoid glycoside catalpol was found to be sequestered by larvae ofMeris alticola feeding onPenstemon virgatus and by larvae ofNeoterpes graefiaria which utilizeP. barbatus. The strikingly similar larval patterns of these two ennomine geometrids were previously considered to be disruptive, but predator-based Mulle...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01013895
更新日期:1988-02-01 00:00:00
abstract::The feasibility of using the synthetic sex pheromone, disparlure, as a mating confusant of the nun moth (Lymantria monacha L.) was investigated on wild populations occurring in outbreak proportions in Poland and in low density in Czechoslovakia. The size of experimental plots ranged from 1 to 12 hectares. The amounts ...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01013905
更新日期:1988-02-01 00:00:00
abstract::Moths belonging to the speciesSpodoptera sunia have been recognized as a new pest of cotton in Central America. By means of electro-physiologic investigations, solid sample injection gas chromatography, and combined gas chromatography-mass spectrometry, (Z)-9-tetradecenyl acetate, (9Z,12E)-9,12-tetradecadienyl acetate...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01013915
更新日期:1988-02-01 00:00:00
abstract::Levels of phenolic secondary metabolites in the leaves of four west African rain-forest plants,Acacia pennata, Cynometra leonensis, Diopyros thomasii, andTrema guineensis, were correlated with incident light intensity at both the inter- and intraindividual level. Enhanced phenolic levels under high light intensity app...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01022527
更新日期:1988-01-01 00:00:00
abstract::A current model of amino acid chemoreception has generated the idea that pH affects the efficiency of stimulus-receptor binding by altering the charge distribution on stimulus molecules. The model suggests that amino acids are maximally stimulatory near their isoelectric points. We point out that, within a broad range...
journal_title:Journal of chemical ecology
pub_type: 杂志文章
doi:10.1007/BF01022537
更新日期:1988-01-01 00:00:00