| plants used in guatemala for the treatment of gastrointestinal disorders. 1. screening of 84 plants against enterobacteria. | gastrointestinal disorders are important causes of morbidity in developing countries. natural healing is the traditional way of treating these diseases in guatemala. ethnobotanical surveys and literature reviews showed that 385 plants from 95 families are used in guatemala for the treatment of gastrointestinal disorders. the activity of 84 of the most commonly used plants was screened in vitro against five enterobacteria pathogenic to man (enteropathogenic escherichia coli, salmonella enteritidi ... | 1990 | 2214824 |
| inhibition of intestinal chloride secretion by proanthocyanidins from guazuma ulmifolia. | the antisecretory activity of guazuma ulmifolia bark was examined in rabbit distal colon mounted in an ussing chamber. chloride secretion was stimulated by cholera toxin and prostaglandin e2 (pge2). guazuma ulmifolia extract (gue) completely inhibited cholera toxin-induced secretion if the extract was added to the mucosal bath prior to the toxin. adding the extract after administration of the toxin had no effect on secretion. gue did not inhibit pge2-induced chloride secretion. these results ind ... | 1995 | 7617760 |
| study of the anti-hyperglycemic effect of plants used as antidiabetics. | the purpose of this research was to study the anti-hyperglycemic effect of 28 medicinal plants used in the treatment of diabetes mellitus. each plant was processed in the traditional way and intragastrically administered to temporarily hyperglycemic rabbits. the results showed that eight out of the 28 studied plants significantly decrease the hyperglycemic peak and/or the area under the glucose tolerance curve. these plants were: guazuma ulmifolia, tournefortia hirsutissima, lepechinia caulescen ... | 1998 | 9683340 |
| [host plants of aphis gossypii (aphididae), vector of virus of cucumis melo melon (cucurbitaceae) in costa rica]. | plant species associated with commercial melon crops and surrounding areas were examined to identity the natural host plants of aphis gossypii glover. the study was conducted in two farms located in different melon production areas and plant life zones of costa rica. plant species diversity, percent coverage and distribution over time were recorded during one year. differences between locations were observed. a total of 86 plant species (49 families) and 72 plant species (40 families) were ident ... | 2001 | 11795159 |
| in vitro inhibition of [3h]-angiotensin ii binding on the human at1 receptor by proanthocyanidins from guazuma ulmifolia bark. | a bioassay-guided fractionation of the 70% acetone extract of the bark of guazuma ulmifolia lam. on the inhibition of angiotensin ii binding to the at 1 receptor led to the isolation and identification of bioactive oligomeric and polymeric proanthocyanidins consisting mainly of (-)-epicatechin units. the displacement of [3h]-angiotensin ii binding was dose-dependent and correlated with the degree of polymerization of the different fractions containing proanthocyanidins. a strong displacement was ... | 2002 | 12494331 |
| ethnobotany and natural products: the search for new molecules, new treatments of old diseases or a better understanding of indigenous cultures? | results of various projects on mexican indian ethnobotany and some of the subsequent pharmacological and phytochemical studies are summarised focusing both on chemical-pharmacological as well as anthropological (ethnopharmacological) aspects of our research. we have identified taste and smell properties of medicinal (vs. non-medicinal) plants as important indigenous selection criteria. there exist well-defined criteria specific for each culture, which lead to the selection of a plant as a medici ... | 2003 | 12570770 |
| antibacterial, antiprotozoal and antioxidant activity of five plants used in izabal for infectious diseases. | methanol and aqueous extracts from fi ve plant species, used in traditional medicine in guatemala for the treatment of microbial infections, were tested in vitro for their ability to scavenge dpph, oh(.) and o(2) (-) radicals and to inhibit lipoperoxidation (lpo) in order to establish a relationship between their antioxidant activities and their effects against infectious agents. acalypha guatemalensis, ocimum micranthum and smilax spinosa possessed a significant activity against both the three ... | 2003 | 12722133 |
| 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 |
| antiviral effect of guazuma ulmifolia and stryphnodendron adstringens on poliovirus and bovine herpesvirus. | crude extract (ce) and aqueous (aqf) and ethyl acetate (etoacf) fractions of guazuma ulmifolia lam., sterculiaceae and the corresponding aqf, etoacf of stryphnodendron adstringens (mart.) coville, leguminosae were tested for their antiviral activity against poliovirus 1 (p-1) and bovine herpesvirus 1 (bhv-1) in hep-2 cultured cells. the antiviral activity was monitored by plaque assay and immunofluorescence assay (ifa) under virucidal and therapeutic protocols. the therapeutic protocol demonstra ... | 2006 | 16754999 |
| [vegetation diversity, composition and structure in a cattle agro-landscape of matiguás, nicaragua]. | the diversity, composition and structure of vegetation in a cattle landscape in matiguás, nicaragua was characterized, and the floristic and structural differences of six types of habitats (secondary forests, riparian forests, charrales, live fences and pastures with high and low tree cover) were compared. a total of 3 949 trees of 180 species and 52 families were recorded. forty six percent of the total trees reported for the landscape were represented by guazuma ulmifolia (18.5%), bursera sima ... | 2005 | 17354450 |
| ex vivo evaluation of the percutaneous penetration of proanthocyanidin extracts from guazuma ulmifolia using photoacoustic spectroscopy. | in this work photoacoustic spectroscopy has been applied to determine ex vivo the percutaneous penetration of proanthocyanidins present in extracts obtained from guazuma ulmifolia, in rats. lotion formulations containing 0.0663 mg of procyanidin b2 day(-1)animal(-1) were topically applied during 7, 10 and 13 days in each group of the animals. after the end of treatment the animals were killed, the skin dissected to remove the basal content, and the measurements were carried out as a function of ... | 2007 | 17386764 |
| muscodor albus e-6, an endophyte of guazuma ulmifolia making volatile antibiotics: isolation, characterization and experimental establishment in the host plant. | muscodor albus is an endophytic fungus, represented by a number of isolates from tropical tree and vine species in several of the world's rainforests, that produces volatile organic compounds (vocs) with antibiotic activity. a new isolate, e-6, of this organism, with unusual biochemical and biological properties, has been obtained from the branches of a mature guazuma ulmifolia (sterculiaceae) tree growing in a dry tropical forest in sw ecuador. this unique organism produces many vocs not previo ... | 2007 | 17660425 |
| the aerial parts of guazuma ulmifolia lam. protect against nsaid-induced gastric lesions. | guazuma ulmifolia lam., a member of the sterculiaceae family, is used in folk medicine because of its antioxidant, antimicrobial and antihypertensive properties. most of the research work carried out on this plant has focused on the bark because of its high concentration of antioxidant proanthocyanidins. the flowers and leaves of guazuma ulmifolia, though less studied, are also used as a remedy for different conditions, such as kidney and gastrointestinal diseases, fever and diabetes. the aim of ... | 2007 | 17884315 |
| hypotensive and vasorelaxant effects of the procyanidin fraction from guazuma ulmifolia bark in normotensive and hypertensive rats. | was to investigate the in vivo and in vitro cardiovascular activity of a procyanidin fraction (pcf) obtained from acetone extract of guazuma ulmifolia bark which has traditionally been used as an antihypertensive agent. | 2008 | 18314282 |
| determination of antibacterial and antioxidant potential of some medicinal plants from saurashtra region, india. | many plants used in saurashtra folk medicine have been reported to exhibit high antibacterial and antioxidant activities. in the present study, some parts of five plants, guazuma ulmifolia l., manilkara zapota l., melia azedarach l., syzygium cumini l. and wrightia tomentosa r.& s., were evaluated for their antibacterial activity, total phenol content, flavonoid content, 2,2-diphenyl-1-picrylhydrazyl free radical scavenging activity and phytochemical analysis, using successive extraction by cold ... | 2009 | 20502546 |
| molecular characterization and evaluation of virulence factors of cryptococcus laurentii and cryptococcus neoformans strains isolated from external hospital areas. | cryptococcosis is a common opportunistic fungal infection that is mainly caused by the species cryptococcus neoformans and cryptococcus gattii, but there have recently been several reports of infection by non-neoformans cryptococcus species. the aims of this study were to genetically characterize cryptococcus spp. isolated from external hospital areas in minas gerais state, brazil, and to evaluate their pathogenic potential, analyzing their phospholipase and melanin production and the capacity f ... | 2010 | 20943154 |
| antimicrobial and cytotoxic effects of mexican medicinal plants. | the antimicrobial effects of the mexican medicinal plants guazuma ulmifolia, justicia spicigera, opuntia joconostle, o. leucotricha, parkinsonia aculeata, phoradendron longifolium, p. serotinum, psittacanthus calyculatus, tecoma stans and teucrium cubense were tested against several human multi-drug resistant pathogens, including three gram (+) and five gram (-) bacterial species and three fungal species using the disk-diffusion assay. the cytotoxicity of plant extracts on human cancer cell line ... | 2011 | 22312741 |
| antimicrobial activity of some medicinal plants from the cerrado of the centralwestern region of brazil. | ethanol extracts from six selected species from the cerrado of the central-western region of brazil, which are used in traditional medicine for the treatment of infectious diseases and other medical conditions, namely erythroxylum suberosum st. hil. (erythroxylaceae), hyptis crenata pohl. ex benth. (lamiaceae), roupala brasiliensis klotz. (proteaceae), simarouba versicolor st. hil. (simaroubaceae), guazuma ulmifolia lam. (sterculiaceae) and protium heptaphyllum (aubl.) march. (burseraceae), as w ... | 2012 | 24031956 |
| phenolic composition and antiparasitic activity of plants from the brazilian northeast "cerrado". | this work describes the antiparasitic and cytotoxic activities of three plant species from the cerrado biome, northeastern brazil. significant antiparasitic inhibition was observed against trypanosoma cruzi (63.86%), leishmania brasiliensis (92.20%) and leishmania infantum (95.23%) when using ethanol extract from leaves of guazuma ulmifolia lam. (malvaceae), at a concentration of 500 μg/ml. however, low levels of inhibition were observed when assessing leishmanicidal and trypanocidal (clone cl-b ... | 2016 | 27081371 |
| biological screening of selected medicinal panamanian plants by radioligand-binding techniques. | nineteen plants from the republic of panama were selected by their traditional uses in the treatment of hypertension, cardiovascular, mental and feeding disorders and 149 extracts were screened using radioligand-receptor-binding assays. the methanol:dicloromethane extracts of the bark and leaves of anacardium occidentale l., the leaves of begonia urophylla hook., the roots of bocconia frutescens l., the stems and leaves of cecropia cf.obtusifolia bertol., the branches of clusia coclensis standl. ... | 2001 | 11292241 |
| guazuma ulmifolia bark-synthesized ag, au and ag/au alloy nanoparticles: photocatalytic potential, dna/protein interactions, anticancer activity and toxicity against 14 species of microbial pathogens. | in the present study, we focused on a quick and green method to fabricate ag, au and ag/au alloy nanoparticles (nps) using the bark extract of guazuma ulmifolia l. green synthesized metal nps were characterized using different techniques, including uv-vis spectroscopy, ft-ir, xrd, afm and hr-tem analyses. the production of ag, au and ag/au alloy nps was observed monitoring color change from colorless to brown, followed by pink and dark brown, as confirmed by uv-vis spectroscopy characteristic pe ... | 2017 | 28076823 |
| basic ecology of the oaxacan spiny-tailed iguana ctenosaura oaxacana (squamata: iguanidae), in oaxaca, mexico. | the oaxacan spiny-tailed iguana ctenosaura oaxacana is a restricted species to the isthmus of tehuantepec in southern oaxaca, mexico. this reptile is one of the less known iguanid species. we census-tracked a population in the south ofniltepec, oaxaca, mexico from may 2010 to april 2011. throughout one year, a total of 10 line transects were situated and recorded in the study area to determine relative abundance and density, and habitat type use (dry forest, nanchal, grassland, riparian vegetati ... | 2012 | 23342515 |
| four new leaf-mining acalyptris species from guatemala and belize, with new data on bionomics of stigmella pruinosa (lepidoptera: nepticulidae). | this paper describes four new species: acalyptris basicornis remeikis & stonis, sp. nov., a. peteni diškus & stonis, sp. nov., a. caribbicus diškus & stonis, sp. nov. (host-plant: lantana involucrata l., verbenaceae), and a. statuarius diškus & stonis, sp. nov. another species, stigmella pruinosa puplesis & robinson, is re-described, with new distribution records in guatemala and with the first documentation of leaf-mines on guazuma ulmifolia lam. (malvaceae). all five species are illustrated wi ... | 2013 | 25112742 |
| evidence of higher photosynthetic plasticity in the early successional guazuma ulmifolia lam. compared to the late successional hymenaea courbaril l. grown in contrasting light environments. | the present study investigated changes in photosynthetic characteristics of guazuma ulmifolia lam. (early successional species) and hymenaea courbaril l. (late successional species) grown in contrasting light conditions as a way of assessing photosynthetic plasticity. early successional species typically inhabit gap environments being exposed to variability in multiple resources, hence it is expected that these species would show higher photosynthetic plasticity than late successional ones. in o ... | 2010 | 20231962 |
| diurnal and seasonal carbon balance of four tropical tree species differing in successional status. | this study addressed some questions about how a suitable leaf carbon balance can be attained for different functional groups of tropical tree species under contrasting forest light environments. the study was carried out in a fragment of semi-deciduous seasonal forest in narandiba county, são paulo estate, brazil. 10-month-old seedlings of four tropical tree species, bauhinia forficata link (caesalpinioideae) and guazuma ulmifolia lam. (sterculiaceae) as light-demanding pioneer species, and hyme ... | 2008 | 19197495 |
| functional groups of forest succession as dissipative structures: an applied study. | this study tested the hypothesis that dissipative efficiency of tropical tree species could be an ecological advantage in the forest succession process. daily leaf gas exchanges of a pioneer species (guazuma ulmifolia) and a late successional species (cariniana legalis) were evaluated under well-irrigated conditions and by withholding irrigation. analyses of network connectance (cg) and plant autonomy (at) were carried out in order to assess metabolic network changes in response to environmental ... | 2004 | 15620011 |
| partial substitution of soybean meal by gliricidia sepium or guazuma ulmifolia leaves in the rations of growing lambs. | the partial substitution of soybean meal by gliricidia sepium or guazuma ulmifolia leaves in the rations of growing lambs was evaluated at an experimental station in the dry tropics of mexico. sixteen weaned crossbred male pelibuey × blackbelly lambs (initial weight 19 ± 1.66 kg), distributed in a completely randomized design, were assigned to the following protein sources: (a) 100% soybean meal, (b) 50% soybean meal + 50% g. sepium, (c) 50 % soybean meal + 25% g. ulmifolia + 25% g. sepium, and ... | 2016 | 26494547 |