| isolation of picropolygamain from the resin of bursera simaruba. | | 1992 | 1294696 |
| ecology and removal of introduced rhesus monkeys: desecheo island national wildlife refuge, puerto rico. | a field project was conducted to remove an introduced population of rhesus macaques (macaca mulatta) from desecheo island national wildlife refuge, puerto rico. a group of 57 monkeys from cayo santiago was released on desecheo island in 1966 to study processes of adaptation. observations in 1969 and 1970 implicated the monkeys in a drastic decline of the nesting populations of brown boobies (sula leucogaster) and red-footed boobies (sula sula). previous efforts at trapping and removal had been c ... | 1989 | 2780956 |
| gumbo limbo, a new group c arbovirus from the florida everglades. | | 1969 | 4387912 |
| susceptibility of the sf9 insect cell line to infection with adventitious viruses. | sf9, the insect cell line commonly used for gene expression by recombinant baculovirus (bv), can be infected by st. louis encephalitis (sle) virus, a flavivirus, resulting in a persistent, productive, and cytopathic infection, while retaining the ability to be infected with a recombinant baculovirus (rbv). we now demonstrate using double immunofluorescence that single cells are dually infected with sle virus and rbv. fourteen additional viruses including additional flaviviruses, other arbovirus ... | 1994 | 7811453 |
| antiinflammatory activity of some medicinal plant extracts form venezuela. | six medicinal plant extracts from venezuela, used in traditional medicine, were investigated for their anti-inflammatory potential against adjuvant-carrageenan-induced inflammation (acii). all doses expressed here are equivalents of dried starting plant materials (1.50 g dry plant/kg body wt.). the most interesting plant extracts were synedrella nodiflora, and the hexane leaf extract of bursera simaruba. in acii, orally administered extracts (at doses 40 and 80 mg/kg, respectively), inhibited bo ... | 1996 | 9121169 |
| [neutralization of the hemorrhagic effect induced by bothrops asper (serpentes: viperidae) venom with tropical plant extracts]. | organic extracts representing 48 species included in 30 families of costa rican tropical plants were evaluated for their ability to neutralize hemorrhagic activity induced by the venom of the snake bothrops asper. a bioassay in mice was used, based on intradermal injection of either venom or venom-extract mixtures followed by the measurement of hemorrhagic areas. total inhibition of hemorrhage was observed with the ethanolic, ethyl acetate and aqueous extracts of bursera simaruba, clusia torresi ... | 1999 | 10883329 |
| screening of anti-bacterial activity of medicinal plants from belize (central america). | twenty-one extracts from seven herbal drugs, aristolochia trilobata (aristolochiaceae) leaves and bark, bursera simaruba (burseraceae) bark, guazuma ulmifolia (sterculiaceae) bark, hamelia patens (rubiaceae) leaves and syngonium podophyllum (araceae) leaves and bark, used in traditional medicine of belize (central america) as deep and superficial wound healers, were evaluated for their anti-bacterial properties. activity was tested against standard strains of escherichia coli atcc 25922, pseudom ... | 2003 | 12787962 |
| polliniferous plants and foraging strategies of apis mellifera (hymenoptera: apidae) in the yucatán peninsula, mexico. | a study of the most important polliniferous plants for european and africanized honeybees (apis mellifera l.) was made in quintana roo state. comparisons were made between the plants visited by both bee types in order to determine whether there were qualitative or quantitative differences in their choice of plant species. also some foraging strategies of the honeybees were analysed. pollen from pollen load samples was acetolysed and mounted on slides. subsequently the pollen grains were identifi ... | 2002 | 12947587 |
| anti-inflammatory activity of leaf extract and fractions of bursera simaruba (l.) sarg (burseraceae). | seeking for new medicinal compounds in plants used in traditional medicine, which grow in venezuela, we investigated the anti-inflammatory activity of the leaf hexane extract (he) and several fractions obtained from sp. bursera simaruba (l.) sarg. (indio desnudo) using carrageenan-induced paw edema inflammation. oral administration of leaf he as well i (91-100) fraction, and compounds viii 25-26 and viii 29, inhibited the carrageenan-induced paw edema with different capacity and time course, ove ... | 2004 | 15099859 |
| antibacterial activity of crude extracts from mexican medicinal plants and purified coumarins and xanthones. | thirty-two extracts from 22 mexican medicinal plants of 15 different families were assayed to determine their antibacterial activity against escherichia coli and staphylococcus aureus. seventeen plants showed antibacterial activity, while five plants showed no activity against both bacteria. all of the extracts showed higher activity against staphylococcus aureus (methicillin-sensitive and methicillin-resistant) than against escherichia coli, except one. among the plants examined, bursera simaru ... | 2005 | 15707768 |
| tropical forest restoration: tree islands as recruitment foci in degraded lands of honduras. | tropical forest recovery in pastures is slowed by a number of biotic and abiotic factors, including a lack of adequate seed dispersal and harsh microclimatic extremes. accordingly, methods to accelerate forest recovery must address multiple impediments. here, we evaluated the ability of "tree islands" to serve as "recruitment foci" in a two-year study at three sites in northern honduras. islands of three sizes (64, 16, and 4 m2) and at two distances to secondary forest (20 and 50 m) were created ... | 2006 | 16711037 |
| investigation of essential oil extracts from four native jamaican species of bursera for antibacterial activity. | bacterial infection with organisms resistant to antibiotics have increased during the last few decades worldwide. because of this increase, the authors decided to subject the essential oils from the stem, leaves and fruits of the four native jamaica species of bursera to microbial studies. | 2007 | 17621840 |
| preliminary study of the anti-inflammatory activity of hexane extract and fractions from bursera simaruba (linneo) sarg. (burseraceae) leaves. | bursera simaruba (l.) sarg. leaves hexane extracts display anti-inflammatory activity on the adjuvant-carrageenan-induced inflammation in rats. in order to isolate and identify the active compounds of the hexane extract, we performed a preliminary phytochemical study and a bioassay-directed fractionation using the carrageenan-induced paw oedema test in mice. from the nine fractions (a-i) obtained, of an initial chromatographic separation, fractions a and e (doses equivalents to 1.50 g dry plant/ ... | 2008 | 18155865 |
| allelochemical effects of volatile compounds and organic extracts from muscodor yucatanensis, a tropical endophytic fungus from bursera simaruba. | muscodor yucatanensis, an endophytic fungus, was isolated from the leaves of bursera simaruba (burseraceae) in a dry, semideciduous tropical forest in the ecological reserve el eden, quintana roo, mexico. we tested the mixture of volatile organic compounds (vocs) produced by m. yucatanensis for allelochemical effects against other endophytic fungi, phytopathogenic fungi and fungoids, and plants. vocs were lethal to guignardia mangifera, colletotrichum sp., phomopsis sp., alternaria solani, rhizo ... | 2010 | 20809145 |
| antifungal activity of 10 guadeloupean plants. | screening of the antifungal activities of ten guadeloupean plants was undertaken to find new extracts and formulations against superficial mycoses such as onychomycosis, athlete's foot, pityriasis versicolor, as well as the deep fungal infection pneumocystis pneumonia. for the first time, the cmi of these plant extracts [cyclohexane, ethanol and ethanol/water (1:1, v/v)] was determined against five dermatophytes, five candida species, scytalidium dimidiatum, a malassezia sp. strain and pneumocys ... | 2012 | 23280633 |
| ethnobotanical survey and antibacterial activity of plants used in the altiplane region of mexico for the treatment of oral cavity infections. | the ethnobotanical survey conducted in this study showed 47 plant species used in the altiplane region of mexico for the treatment of dental diseases such as toothache, dental caries, periodontal disease and gingivitis. | 2012 | 22465591 |
| an expanded nuclear phylogenomic pcr toolkit for sapindales. | we tested pcr amplification of 91 low-copy nuclear gene loci in taxa from sapindales using primers developed for bursera simaruba (burseraceae). | 2016 | 28101434 |
| infidelity of leafcutting ants to host plants: resource heterogeneity or defense induction? | leafcutting ants have strong among- and within-plant preferences, and generally abandon plants long before they are completely defoliated. two tropical deciduous forest tree species preferred by the leafcutting ant atta colombica were studied to determine how variation in resource quality affects ant selectivity and partial defoliation of plants. significant differences in palatability and leaf characteristics of spondias mombin and bursera simaruba were found among trees and among leaf types wi ... | 1990 | 28312716 |
| ontogenetic modulation of branch size, shape, and biomechanics produces diversity across habitats in the bursera simaruba clade of tropical trees. | organismal size and shape inseparably interact with tissue biomechanical properties. it is therefore essential to understand how size, shape, and biomechanics interact in ontogeny to produce morphological diversity. we estimated within species branch length-diameter allometries and reconstructed the rates of ontogenetic change along the stem in mechanical properties across the simaruba clade in the tropical tree genus bursera, measuring 376 segments from 97 branches in nine species in neotropica ... | 2013 | 22947317 |
| retention of stored water enables tropical tree saplings to survive extreme drought conditions. | trees generally maintain a small safety margin between the stem water potential (ψstem) reached during seasonal droughts and the ψstem associated with their mortality. this pattern may indicate that species face similar mortality risk during extreme droughts. however, if tree species vary in their ability to regulate ψstem, then safety margins would poorly predict drought mortality. to explore variation among species in ψstem regulation, i subjected potted saplings of six tropical tree species t ... | 2017 | 28338739 |
| diverse patterns of stored water use among saplings in seasonally dry tropical forests. | tree species in seasonally dry tropical forests likely vary in their drought-survival mechanisms. drought-deciduousness, which reduces water loss, and low wood density, which may permit dependence on stored water, are considered key traits. for saplings of six species at two distinct sites, we studied these and two associated traits: the seasonal amount of water released per stem volume ("water released") and the hydraulic capacitance of the stem (c). two deciduous species with low stem density, ... | 2015 | 26025573 |
| inhibitory effects of lupene-derived pentacyclic triterpenoids from bursera simaruba on hsv-1 and hsv-2 in vitro replication. | the cytotoxicity and antiviral properties of bursera simaruba against herpes simplex viruses (hsv-1 and hsv-2) were investigated through a bioactivity-guided isolation protocol. the plant material was fractionated using solvent-solvent partitioning, size-exclusion and thin-layer chromatography. the antiviral compounds present in the most active fractions were identified by means of lc-ms and nmr. three different methods were compared during the evaluation of antiviral activity of samples. four l ... | 2015 | 25674932 |
| acremoxanthone e, a novel member of heterodimeric polyketides with a bicyclo[3.2.2]nonene ring, produced by acremonium camptosporum w. gams (clavicipitaceae) endophytic fungus. | bioactivity-directed fractionation of the organic mycelium extract of the endophytic fungus acremonium camptosporum w. gams (clavicipitaceae), isolated from the leaves of bursera simaruba (burseraceae), led to the isolation of six major heterodimeric polyketides, including one not previously characterized acremoxanthone derivative. in addition, the already known acremoxanthone c, acremonidins a and b, and acremoxanthones a and b were obtained. the structure of the new compound was established by ... | 2015 | 25641841 |
| differential effects of landscape-level environmental features on genetic structure in three codistributed tree species in central america. | landscape genetic studies use spatially explicit population genetic information to determine the physical and environmental causes of population genetic structure on regional scales. comparative studies that identify common barriers to gene flow across multiple species within a community are important to both understand the evolutionary trajectories of populations and prioritize habitat conservation. here, we use a comparative landscape genetic approach to ask whether gradients in temperature or ... | 2012 | 22988889 |
| interannual variability of growth and reproduction in bursera simaruba: the role of allometry and resource variability. | plants are expected to differentially allocate resources to reproduction, growth, and survival in order to maximize overall fitness. life history theory predicts that the allocation of resources to reproduction should occur at the expense of vegetative growth. although it is known that both organism size and resource availability can influence life history traits, few studies have addressed how size dependencies of growth and reproduction and variation in resource supply jointly affect the coupl ... | 2012 | 22486098 |
| diversification in species complexes: tests of species origin and delimitation in the bursera simaruba clade of tropical trees (burseraceae). | molecular phylogenies are invaluable for testing morphology-based species delimitation in species complexes, as well as for examining hypotheses regarding the origination of species in these groups. using five nucleotide markers, we reconstructed the phylogeny of the bursera simaruba species complex of neotropical trees to test the notion that four "satellite" species originated from populations of the most widely distributed member of the genus, b. simaruba, which the satellites strongly resemb ... | 2010 | 20723609 |
| esi-ms, esi-ms/ms fingerprint and lc-esi-ms analysis of proathocyanidins from bursera simaruba sarg bark. | direct flow injection/electrospray ionization/ion trap tandem mass spectrometry was used to investigate the presence of proanthocyanidins (pas) in the methanolic extract of b. simaruba bark. additionally, an lc-esi-ms qualitative study was performed by using a monolithic stationary phase. the fragmentation pattern obtained evidenced the presence in b. simaruba bark of pas belonging to the series of polymers of epicatechin, along with their glycosilated derivatives. | 2009 | 20120104 |
| phenolic compounds from bursera simaruba sarg. bark: phytochemical investigation and quantitative analysis by tandem mass spectrometry. | phytochemical investigation of the methanolic extract of bursera simaruba bark led to the isolation of 11 compounds, including lignans yatein, beta-peltatin-o-beta-d-glucopyranoside, hinokinin and bursehernin, and three natural compounds namely 3,4-dimetoxyphenyl-1-o-beta-d-(6-sulpho)-glucopyranoside, 3,4,5-trimetoxyphenyl 1-o-beta-d-(6-sulpho)-glucopyranoside and 3,4-diidroxyphenylethanol-1-o-beta-d-(6-sulpho)-glucopyranoside. their structures were established by nmr and esi/ms experiments. add ... | 2009 | 19329133 |
| estimation of gene flow into fragmented populations of bursera simaruba (burseraceae) in the dry-forest life zone of puerto rico. | we examined the impact of habitat fragmentation on gene flow in populations of the neotropical tree bursera simaruba. in particular, we compared the effectiveness of three common techniques to estimate gene flow in the context of a highly disturbed system. paternity analysis on emerging seedlings from eight small (n = 3 to 9) stands of trees showed that between 45% and 100% of seedlings were sired from outside their stand, indicating pollen moved readily over the isolation distances examined. ba ... | 2007 | 21636373 |
| interspecific variation in xylem vulnerability to cavitation among tropical tree and shrub species. | in tropical moist forests, seasonal drought limits plant survival, productivity and diversity. drought-tolerance mechanisms of tropical species should reflect the maximum seasonal water deficits experienced in a particular habitat. we investigated stem xylem vulnerability to cavitation in nine tropical species with different life histories and habitat associations. stem xylem vulnerability was scored as the xylem water potential causing 50 and 75% loss of hydraulic conductivity (p50 and p75, res ... | 2005 | 16137941 |
| screening of the topical anti-inflammatory activity of some central american plants. | hexane, chloroform and methanol extracts of seven herbal drugs used in the folk medicine of central america against skin disorders (aristolochia trilobata leaves and bark, bursera simaruba bark, hamelia patens leaves, piper amalago leaves, and syngonium podophyllum leaves and bark) were evaluated for their topical anti-inflammatory activity against the croton oil-induced ear oedema in mice. most of the extracts induced a dose-dependent oedema reduction. the chloroform extract of almost all the d ... | 2002 | 12065153 |
| [original humus forms in a semi-deciduous tropical forest in guadeloupe]. | humus profiles underneath the canopy of dominant tree species in two secondary semi-evergreen forest sites in grande-terre (guadeloupe) were analysed with a micromorphological method. in the vertisol of a tree plantation, the humus formed was rather similar under all tree species being an eumull and essentially due to the activity of the endoanecic earthworm polypheretima elongata. in a natural secondary forest located on a steep slope and associated with a rendzina soil (without endoanecic eart ... | 2001 | 11510418 |
| [plant extracts with cytostatic properties growing in cuba. ii]. | the study of the cytostatic activity of aqueous, alcoholic and ketonic extracts from 18 parts of 9 species of superior plants of the families araceae, borraginacease, burseraceae, cesalpinaceae, meliaceae, compositae, rebiaceae, cruciferaceae and verbenaceae using the microbiologic method of described by kubas in 1972 is pursued. the best results were obtained from hamelia patens. lippia alba, lepidium virginicum, cassia ligustrina, bursera simaruba and heliotropium campechianum extracts. | 2009 | 161406 |