U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Publication Year 2008 Remove constraint Publication Year: 2008 Subject Mexico Remove constraint Subject: Mexico
Start Over

Search

509  Search Results

« Previous | 1 - 50 of 509 |
Number of results to display per page

Search Results

1. 21β-Hydroxy-oleanane-type triterpenes from Hippocratea excelsa

Author:
Cáceres-Castillo, D.; Mena-Rejón, G.J.; Cedillo-Rivera, R.; Quijano, L.
Source:
Phytochemistry 2008 v.69 no.4 pp. 1057-1064
ISSN:
0031-9422
Subject:
Celastraceae; medicinal plants; phytochemicals; triterpenoids; chemical structure; spectral analysis; stereochemistry; medicinal properties; Giardia lamblia; human health; Mexico
Abstract:
... Stem bark of Hippocratea excelsa afforded six pentacyclic triterpenes, five oleanane and one ursane types. They were identified as 11β,21β-dihydroxy-olean-12-ene-3-one (2), 3α,11α,21β-trihydroxy-olean-12-ene (3), 3α,21β-dihydroxy-11α-methoxy-olean-12-ene (4), 3α,21β-dihydroxy-olean-9(11),12-diene (5), 3α,21β-dihydroxy-olean-12-ene (6) and 3α,21β-dihydroxy-11α-methoxy-urs-12-ene, isolated as its di ...
DOI:
10.1016/j.phytochem.2007.10.016

2. Activity of Medicinal Plants, Used by Native Populations from Sonora, Mexico, Against Enteropathogenic Bacteria

Author:
Moreno Salazar, Sergio F.; Enriquez Verdugo, Aracely; Cuamea Lopez, Carolina; Bolado Martinez, Enrique; Medrano Candelas, Teresa; Robles-Zepeda, Ramon E.
Source:
Pharmaceutical biology 2008 v.46 no.10-11 pp. 732-737
ISSN:
1388-0209
Subject:
traditional medicine; Pithecellobium dulce; human diseases; enteropathogens; Lysiloma; methanol; Acacia; hexane; indigenous peoples; Salmonella Typhimurium; medicinal plants; enteropathogenic Escherichia coli; dysentery; digestive system diseases; Shigella flexneri; antibacterial properties; Mexico
DOI:
10.1080/13880200802215800

3. Agar properties of two species of Gracilariaceae from the Gulf of California, Mexico

Author:
Orduña-Rojas, Javier; García-Camacho, Karla Y.; Orozco-Meyer, Priscila; Ríosmena-Rodríguez, Rafael; Pacheco-Ruiz, Isaí; Zertuche-González, José A.; Meling-López, Alf E.
Source:
Journal of applied phycology 2008 v.20 no.2 pp. 169-175
ISSN:
0921-8971
Subject:
Gracilaria; Gracilariopsis; agar; autumn; gel strength; gelation; macroalgae; melting point; seawater; spring; sulfates; summer; water temperature; Gulf of California; Mexico
Abstract:
... Agar properties of two potentially commercial important seaweeds from the Gulf of California were studied. Maximum yield in Gracilaria vermiculophylla (45.7%) occurred during the summer months, coinciding with high water temperatures (31°C) whereas minimum yields (11.6%) were obtained during the coldest months of the year when populations of this species diminish in the bay. Gracilariopsis longiss ...
DOI:
10.1007/s10811-007-9202-7

4. Aggregation and C and N contents of soil organic matter fractions in a permanent raised-bed planting system in the Highlands of Central Mexico

Author:
Kelly Lichter; Bram Govaerts; Johan Six; Ken D. Sayre; Jozef Deckers; Luc Dendooven
Source:
Plant and soil 2008 v.305 no.1-2 pp. 237-252
ISSN:
0032-079X
Subject:
silt fraction; clay fraction; nitrogen content; no-tillage; conventional tillage; soil organic matter; crop residues; microaggregates; corn; highlands; soil degradation; soil structure; wheat; planting; field experimentation; raised beds; stable isotopes; silt; Mexico
Abstract:
... Permanent raised bed planting with crop residue retention is a form of conservation agriculture that has been proposed as an alternative to conventional tillage for wheat production systems in the Central Highlands of Mexico. A field experiment comparing permanent and tilled raised beds with different residue management under rainfed conditions was started at El Batán (State of Mexico, Mexico) in ...
DOI:
10.1007/s11104-008-9557-9

5. Alfa-glucosidase-inhibiting activity of some Mexican plants used in the treatment of type 2 diabetes

Author:
Andrade-Cetto, Adolfo; Becerra-Jiménez, Jaime; Cárdenas-Vázquez, René
Source:
Journal of ethnopharmacology 2008 v.116 no.1 pp. 27-32
ISSN:
0378-8741
Subject:
medicinal plants; noninsulin-dependent diabetes mellitus; mechanism of action; Annonaceae; interspecific variation; inhibitory concentration 50; carbohydrate metabolism; alpha-glucosidase; medicinal properties; Leptolobium panamense; traditional medicine; hormone secretion; blood glucose; enzyme inhibitors; intestinal absorption; insulin; rats; Equisetum; hypoglycemic agents; animal models; Cecropia obtusifolia; Mexico
Abstract:
... Type 2 diabetes is an endocrine disease, which accounts for 9% of deaths worldwide. The aim of oral therapy is to reach normoglycemia to prevent later complications. Among glucose-lowering medications, α-glucosidase inhibitors delay the absorption of ingested carbohydrates, reducing the postprandial glucose and insulin peaks. In the present study, we tested the butanolic extracts of four Mexican p ...
DOI:
10.1016/j.jep.2007.10.031

6. Allopolyploid speciation of the Mexican tetraploid potato species Solanum stoloniferum and S. hjertingii revealed by genomic in situ hybridization

Author:
Pendinen, Galina; Gavrilenko, Tatjana; Jiang, Jiming; Spooner, David M.
Source:
Genome 2008 v.51 no.9 pp. 714-720
ISSN:
0831-2796
Subject:
fluorescence in situ hybridization; allopolyploidy; Solanum hjertingii; ribosomal DNA; genome; tetraploidy; chromosome pairing; Solanum stoloniferum; Mexico
Abstract:
... Thirty-six percent of the wild potato (Solanum L. section Petota Dumort.) species are polyploid, and about half of the polyploids are tetraploid species (2n = 4x = 48). Determination of the type of polyploidy and development of the genome concept for members of section Petota traditionally has been based on the analysis of chromosome pairing in species and their hybrids and, most recently, DNA seq ...
Handle:
10113/21735
DOI:
10.1139/G08-052
PubMed:
18772949

7. Ambivalent Landscapes: Environmental Justice in the US–Mexico Borderlands

Author:
Melissa A. Johnson; Emily D. Niemeyer
Source:
Human ecology 2008 v.36 no.3 pp. 371-382
ISSN:
0300-7839
Subject:
economic policy; industrialization; landfills; landscapes; people; politics; sewage; social justice; toxicity; wastelands; Mexico; United States
Abstract:
... How can a single landscape, a shantytown on the US–Mexico border, symbolize environmental devastation for some and progress and ‘the good life’ for others? Our analysis of this landscape and the people who are a part of it highlights the complexities of the environmental justice movement in the current era of neo-liberal economic policies. Although the colonia that we studied, Derechos Humanos, is ...
DOI:
10.1007/s10745-008-9171-8

8. Analysis of Greenhouse Natural Ventilation Under the Environmental Conditions of Central Mexico

Author:
Romero-Gomez, P.; Lopez-Cruz, I.L.; Choi, C.Y.
Source:
Transactions of the ASABE 2008 v.51 no.5 pp. 1753-1761
Subject:
greenhouses; natural ventilation; air flow; environmental factors; air temperature; wind speed; Mexico
Abstract:
... Because of the rapid growth of the greenhouse industry in Mexico and the increasing need for relevant information about structural design and management, the internal microclimate of a naturally ventilated greenhouse in central Mexico was investigated. In order to quantify the ventilation rates resulting from inside and outside environmental conditions, tracer gas (TG) experiments were carried out ...

9. Analysis of bacterial community during the fermentation of pulque, a traditional Mexican alcoholic beverage, using a polyphasic approach

Author:
Escalante, Adelfo; Giles-Gómez, Martha; Hernández, Georgina; Córdova-Aguilar, María Soledad; López-Munguía, Agustín; Gosset, Guillermo; Bolívar, Francisco
Source:
International journal of food microbiology 2008 v.124 no.2 pp. 126-134
ISSN:
0168-1605
Subject:
chemical analysis; chemical composition; bacterial colonization; traditional foods; alcoholic fermentation; alcoholic beverages; Agave; lactic acid bacteria; rheological properties; sap; species diversity; Mexico
Abstract:
... In this study, the characterization of the bacterial community present during the fermentation of pulque, a traditional Mexican alcoholic beverage from maguey (Agave), was determined for the first time by a polyphasic approach in which both culture and non-culture dependent methods were utilized. The work included the isolation of lactic acid bacteria (LAB), aerobic mesophiles, and 16S rDNA clone ...
DOI:
10.1016/j.ijfoodmicro.2008.03.003
PubMed:
18450312

10. Analyzing the Impact of Agave Cultivation on Famine Risk in Arid Pre-Hispanic Northern Mexico

Author:
John M. Anderies; Ben A. Nelson; Ann P. Kinzig
Source:
Human ecology 2008 v.36 no.3 pp. 409-422
ISSN:
0300-7839
Subject:
Agave; Monte Carlo method; agroecology; corn; crop yield; drought; famine; farmers; food availability; humans; mortality; rain; risk; risk assessment; stochastic processes; variance; Mexico; Southwestern United States
Abstract:
... Cultivation of agave was common in pre-Hispanic northern Mexico and the American Southwest, and scholars generally accept that it was a strategy to ensure food supply during years of drought when the maize crop failed. Some even suggest that incorporating agave cultivation make large, nucleated settlements possible in arid northern Mexico ca. 500–900 CE. Yet the environmental circumstances under w ...
DOI:
10.1007/s10745-008-9162-9

11. Ancestry and divergence of subtropical montane forest isolates: molecular biogeography of the genus Abies (Pinaceae) in southern México and Guatemala

Author:
JARAMILLO-CORREA, JUAN P.; AGUIRRE-PLANTER, ERIKA; KHASA, DAMASE P.; EGUIARTE, LUIS E.; PIÑERO, DANIEL; FURNIER, GLENN R.; BOUSQUET, JEAN
Source:
Molecular ecology 2008 v.17 no.10 pp. 2476-2490
ISSN:
0962-1083
Subject:
Abies; ancestry; chloroplast DNA; chloroplasts; forests; genetic drift; genetic markers; genetic variation; microsatellite repeats; mitochondrial DNA; phylogeography; population structure; taxonomy; Guatemala; Mexico
Abstract:
... The genus Abies has a complex history in southern México and Guatemala. In this region, four closely related species, Abies flinckii, A. guatemalensis, A. hickelii, and A. religiosa, are distributed in fragmented and isolated montane populations. Range-wide genetic variation was investigated across species using cytoplasmic DNA markers with contrasted inheritance. Variation at two maternally inher ...
DOI:
10.1111/j.1365-294X.2008.03762.x
PubMed:
18422927

12. Antimicrobial Activity of the Extracts and Essential Oil of Viguiera dentata

Author:
Canales, M.; Hernandez, T.; Rodriguez-Monroy, M.A.; Jimenez-Estrada, M.; Flores, C.M.; Hernandez, L.B.; Gijon, I.C.; Quiroz, S.; Garcia, A.M.; Avila, G.
Source:
Pharmaceutical biology 2008 v.46 no.10-11 pp. 719-723
ISSN:
1388-0209
Subject:
traditional medicine; Gram-negative bacteria; minimum inhibitory concentration; essential oils; antifungal properties; medicinal plants; plant extracts; limonene; chemical constituents of plants; Asteraceae; strains; Gram-positive bacteria; antibacterial properties; Mexico
DOI:
10.1080/13880200802215727

13. Antimicrobial susceptibility and invasive ability of Staphylococcus aureus isolates from mastitis from dairy backyard systems

Author:
Ochoa-Zarzosa, Alejandra; Loeza-Lara, Pedro D.; Torres-Rodríguez, Francisco; Loeza-Ángeles, Heber; Mascot-Chiquito, Nidia; Sánchez-Baca, Sonia; López-Meza, Joel E.
Source:
Antonie van Leeuwenhoek 2008 v.94 no.2 pp. 199-206
ISSN:
0003-6072
Subject:
Staphylococcus aureus; bromides; cows; dairies; epithelial cells; erythromycin; farms; genes; gentamicin; lincomycin; mastitis; penicillins; Mexico
Abstract:
... Fifteen (15) backyard farms were investigated to determine the antimicrobial susceptibility and invasion ability of S. aureus isolates from cows with subclinical mastitis in México. A total of 106 cows were sampled and 31 S. aureus isolates were recovered. S. aureus isolates were resistant to penicillin class antibiotics and susceptible to gentamicin and cetyltrimethylammonium bromide. STA9 and ST ...
DOI:
10.1007/s10482-008-9230-6
PubMed:
18320345

14. Antioxidant aryl-prenylcoumarin, flavan-3-ols and flavonoids from Eysenhardtia subcoriacea

Author:
Narváez-Mastache, J.M.; Novillo, F.; Delgado, G.
Source:
Phytochemistry 2008 v.69 no.2 pp. 451-456
ISSN:
0031-9422
Subject:
medicinal plants; coumarins; spectral analysis; Eysenhardtia; flavanols; medicinal properties; antioxidant activity; chemical structure; rats; Mexico
Abstract:
... Antioxidant activity (AOA) assay-guided chemical analysis, using a rat pancreas homogenate model, of aerial parts from Eysenhardtia subcoriacea, led to isolation of the new compound subcoriacin (3-(2'-hydroxy-4',5'-methylendioxyphenyl)-6-(3"-hydroxymethyl-4"-hydroxybut-2"-enyl)-7-hydroxycoumarin) together with the known substances: (+)-catechin, (-)-epicatechin, (+)-afzelechin, eriodictyol, (+)-ca ...
DOI:
10.1016/j.phytochem.2007.07.019
PubMed:
17892888

15. Applying cointegration and error correction to measure trade linkages: maize prices in the United States and Mexico

Author:
Motamed, Mesbah; Foster, Kenneth A.; Tyner, Wallace E.
Source:
Agricultural economics 2008 v.39 no.1 pp. 29-39
ISSN:
0169-5150
Subject:
North American Free Trade Agreement; corn; data collection; markets; models; prices; Mexico; United States
Abstract:
... The impact of U.S.-grown maize on Mexican markets is a subject of heated debate, and is complicated by limited substitution between white and yellow maize as well as regional price differences within Mexico. This article improves on previous analyses using a detailed data set of white maize prices reported weekly in 11 states across Mexico from 1998 through 2005. Using cointegration analysis and t ...
DOI:
10.1111/j.1574-0862.2008.00312.x

16. Aqueous biphasic system to extract arbuscular mycorrhizal spores from soils

Author:
Salvador-Figueroa, M.; Adriano-Anaya, L.; Tzusuki-Calderón, S.; Gavito Pardo, M.E.; Ocampo, J.A.
Source:
Soil biology & biochemistry 2008 v.40 no.9 pp. 2477-2479
ISSN:
0038-0717
Subject:
viability; vesicular arbuscular mycorrhizae; fractionation; mycorrhizal fungi; tropical soils; sucrose; microbial colonization; methodology; polyethylene glycol; fungal spores; temperature; ammonium sulfate; roots; Mexico
Abstract:
... The aqueous biphasic system (ABS) method using PEG and ammonium sulphate improved the recovery of spores from tropical soils as compared with the sucrose gradient method. The ABS was not affected by low temperatures. The optimal recovery of spores was achieved when 100% PEG and 50% ammonium sulphate concentration and PEG8000 instead of PEG4000 were used. Under these conditions an optimal interface ...
DOI:
10.1016/j.soilbio.2008.05.022

17. Are functional traits good predictors of demographic rates? evidence from five neotropical forests

Author:
L. Poorter; S. J. Wright; H. Paz; D. D. Ackerly; R. Condit; G. Ibarra-Manríquez; K. E. Harms; J. C. Licona; M. Martínez-Ramos; S. J. Mazer; H. C. Muller-Landau; M. Peña-Claros; C. O. Webb; I. J. Wright
Source:
Ecology 2008 v.89 no.7 pp. 1908-1920
ISSN:
0012-9658
Subject:
interspecific variation; plant growth; tropical rain forests; wood density; shade tolerance; tree mortality; leaf area; tree and stand measurements; height; mature plants; forest communities; prediction; South America; Mexico; Central America
Abstract:
... A central goal of comparative plant ecology is to understand how functional traits vary among species and to what extent this variation has adaptive value. Here we evaluate relationships between four functional traits (seed volume, specific leaf area, wood density, and adult stature) and two demographic attributes (diameter growth and tree mortality) for large trees of 240 tree species from five N ...
DOI:
10.1890/07-0207.1
PubMed:
18705377

18. Arsenic and fluoride in the groundwater of Mexico

Author:
Armienta, M. A.; Segovia, N.
Source:
Environmental geochemistry and health 2008 v.30 no.4 pp. 345-353
ISSN:
0269-4042
Subject:
aquifers; arsenic; drinking water; epidemiological studies; fluorosis; groundwater; limestone; minerals; mining; oxidation; toxic substances; water pollution; Mexico
Abstract:
... Concentrations of arsenic and fluoride above Mexican drinking water standards have been detected in aquifers of various areas of Mexico. This contamination has been found to be mainly caused by natural sources. However, the specific processes releasing these toxic elements into groundwater have been determined in a few zones only. Many studies, focused on arsenic-related health effects, have been ...
DOI:
10.1007/s10653-008-9167-8

19. Asymmetry of larval diet breadth and oviposition preference in Leptinotarsa undecimlineata

Author:
Astrid Eben; Antonio López‐Carretero
Source:
Entomologia experimentalis et applicata 2008 v.128 no.1 pp. 27-33
ISSN:
0013-8703
Subject:
Leptinotarsa; Solanum lanceolatum; Solanum myriacanthum; adults; asymmetry; diet; eclosion; eggs; feeds; females; foraging; host plants; laboratory experimentation; larvae; leaves; oviposition; pupae; rearing; sympatry; Mexico
Abstract:
... The relationship between preference and performance was studied under laboratory conditions for larvae and adult females of Leptinotarsa undecimlineata (Stål) (Coleoptera: Chrysomelidae). Leptinotarsa undecimlineata feeds exclusively on Solanum lanceolatum L. (Solanaceae) in the centre of Veracruz, Mexico. A common sympatric species, Solanum myriacanthum Dunal, is not used as host. We conducted a ...
DOI:
10.1111/j.1570-7458.2008.00696.x

20. Autotrophic Biofilm Development on Superficial Samples of the Gold-Silver Mine Tailings, Valenciana (Mexico): Pioneers in Tailings Remediation

Author:
García-Meza, Jessica Viridiana
Source:
Bulletin of environmental contamination and toxicology 2008 v.80 no.1 pp. 53-57
ISSN:
0007-4861
Subject:
biofilm; organic matter; yeasts; Chlorophyta; semiarid zones; microbial colonization; humidity; pH; remediation; temperature; microalgae; Cyanobacteria; Bacillariophyta; bacteria; mine spoil; Mexico
Abstract:
... We report the results of long term bio-assays on microorganism colonization of mine tailings samples, taken from the Valenciana mine tailings (Guanajuato, Mexico), under stable laboratory conditions (humidity, temperature, light exposure). In order to identify the main metabolic groups of the potentially colonizing microorganisms and the implications of their growth on the main tailing's character ...
DOI:
10.1007/s00128-007-9315-3
PubMed:
18058050

21. Avocado Pests and Avocado Trade

Author:
Everett B. Peterson; David Orden
Source:
American journal of agricultural economics 2008 v.90 no.2 pp. 321-335
ISSN:
0002-9092
Subject:
avocados; insect pests; sanitary and phytosanitary regulations; import policies; international trade; risk assessment; economic analysis; risk management; compliance; United States; Mexico
Abstract:
... This article evaluates the effects of a November 2004 phytosanitary rule that removed seasonal and geographic restrictions on the importation of fresh Hass avocados from approved orchards in Mexico to the United States. With the remaining systems approach compliance measures in place, pest risks do not substantially increase and U.S. net welfare rises by $77 million. Removal of remaining complianc ...
DOI:
10.1111/j.1467-8276.2007.01121.x

22. Biodegradation of 2,4-dichlorophenol by a Bacillus consortium

Author:
Herrera, Yesenia; Okoh, Anthony I.; Alvarez, Laura; Robledo, Norma; Trejo-Hernández, María R.
Source:
World journal of microbiology & biotechnology 2008 v.24 no.1 pp. 55-60
ISSN:
0959-3993
Subject:
2,4-dichlorophenol; 2-chlorophenol; ammonium chloride; biodegradation; biomass; bioremediation; culture media; metabolism; nitrogen; polluted soils; xenobiotics; Mexico
Abstract:
... As part of our effort at establishing microbial consortia of relevance for the bioremediation of xenobiotics polluted environments in Mexico, we assessed the aerobic biodegradation of 2,4-dichlorophenol (2,4-DCP) by a consortium of four Bacillus species that were isolated from a polluted soil by enrichment using a mixture of chlorophenols. The bacterial consortium effectively biodegraded 2-chlorop ...
DOI:
10.1007/s11274-007-9437-0

23. Biodiversity and preservation of vanilla: present state of knowledge

Author:
Bory, Séverine; Grisoni, Michel; Duval, Marie-France; Besse, Pascale
Source:
Genetic resources and crop evolution 2008 v.55 no.4 pp. 551-571
ISSN:
0925-9864
Subject:
Vanilla planifolia; biodiversity; domestication; evolution; gene pool; genetic resources; genetic variation; interspecific hybridization; mating systems; models; molecular genetics; odors; phenotypic variation; taxonomy; tropical forests; Mexico
Abstract:
... The genus Vanilla belongs to the Orchidaceae family and Vanilla planifolia, probably endemic from tropical forests in Eastern Mexico, is the main source for commercial vanilla. There has recently been an important number of publications covering Vanilla taxonomy, particularly using molecular genetics, but the taxonomy of the genus is still unclear and numerous synonyms remain. Recent studies showe ...
DOI:
10.1007/s10722-007-9260-3

24. Biodiversity conservation, yield, and alternative products in coffee agroecosystems in Sumatra, Indonesia

Author:
Philpott, Stacy M.; Bichier, Peter; Rice, Robert A.; Greenberg, Russell
Source:
Biodiversity and conservation 2008 v.17 no.8 pp. 1805-1820
ISSN:
0960-3115
Subject:
Coffea arabica; Formicidae; agroecosystems; biodiversity; birds; coffee products; crop yield; farm size; farmers; farms; field crops; forest canopy; forest trees; forests; habitats; livelihood; mammals; national parks; prices; sustainable agriculture; Indonesia; Mexico
Abstract:
... Agroecology and conservation must overlap to protect biodiversity and farmer livelihoods. Coffee agroecosystems with complex shade canopies protect biodiversity. Yet, few have examined biodiversity in coffee agroecosystems in Asia relative to the Americas and many question whether coffee agroecosystems can play a similar role for conservation. We examined vegetation, ant and bird diversity, coffee ...
DOI:
10.1007/s10531-007-9267-2

25. Biogeographical patterns of rocky intertidal communities along the Pacific coast of North America

Author:
Blanchette, Carol A.; Melissa Miner, C.; Raimondi, Peter T.; Lohse, David; Heady, Kristen E.K.; Broitman, Bernardo R.
Source:
Journal of biogeography 2008 v.35 no.9 pp. 1593-1607
ISSN:
0305-0270
Subject:
biogeography; cluster analysis; community structure; environmental factors; species diversity; surface temperature; Mexico; United States
Abstract:
... Our aim in this paper is to present the first broad-scale quantification of species abundance for rocky intertidal communities along the Pacific coast of North America. Here we examine the community-level marine biogeographical patterns in the context of formerly described biogeographical regions, and we evaluate the combined effects of geographical distance and environmental conditions on pattern ...
DOI:
10.1111/j.1365-2699.2008.01913.x

26. Biological and Phylogenetic Characterization of Virulent Newcastle Disease Virus Circulating in Mexico

Author:
Perozo F.; Merino R.; Afonso C. L.; Villegas P.; Calderon N.
Source:
Avian diseases 2008 v.52 no.3 pp. 472-479
ISSN:
0005-2086
Subject:
broiler chickens; Newcastle disease; microbial genetics; amino acid motifs; phylogeny; Avian orthoavulavirus 1; genotype; nucleotide sequences; virulence; Mexico
Abstract:
... AbstractIn 2002––2003, velogenic Newcastle Disease Virus outbreaks, closely related to the Mexican isolates, were confirmed in the United States (U.S.) in southern California, Arizona, Nevada, and Texas. In this report, virulent NDVs isolated in Mexico between 1998 and 2006 were subjected to biologic characterization, using standard pathogenicity tests, and to phylogenetic analysis. Chicken embryo ...
Handle:
10113/25669
DOI:
10.1637/8276-022908-Reg.1

27. Carbon content in vegetation, litter, and soil under 10 different land-use and land-cover classes in the Central Highlands of Michoacan, Mexico

Author:
Ordóñez, J.A.B.; de Jong, B.H.J.; García-Oliva, F.; Aviña, F.L.; Pérez, J.V.; Guerrero, G.; Martínez, R.; Masera, O.
Source:
Forest ecology and management 2008 v.255 no.7 pp. 2074-2084
ISSN:
0378-1127
Subject:
deciduous forests; shrublands; shrubs; montane forests; plant litter; tropical forests; herbaceous plants; coniferous forests; vegetation cover; trees; carbon; carbon sequestration; gas emissions; forest plantations; land use; grasslands; environmental fate; Mexico
Abstract:
... In this study we estimated the carbon content in vegetation, litter, and soil, under 10 different classes of land-use and land-cover classes (LU/LC) in the Purepecha Region, located in the Central Highlands of México. Forests in this area are representative of the montane forests of Central and Southern Mexico and are subject to rapid degradation and deforestation by human pressure. Carbon data f ...
DOI:
10.1016/j.foreco.2007.12.024

28. Cecropia obtusifolia Bertol and its active compound, chlorogenic acid, stimulate 2-NBDglucose uptake in both insulin-sensitive and insulin-resistant 3T3 adipocytes

Author:
Alonso-Castro, Angel Josabad; Miranda-Torres, Ana Cristina; González-Chávez, Marco Martín; Salazar-Olivo, Luis A.
Source:
Journal of ethnopharmacology 2008 v.120 no.3 pp. 458-464
ISSN:
0378-8741
Subject:
Cecropia obtusifolia; chemical constituents of plants; chlorogenic acid; glucose; uptake mechanisms; adipocytes; insulin-dependent diabetes mellitus; noninsulin-dependent diabetes mellitus; glycemic effect; plant extracts; dose response; Mexico
Abstract:
... Ethnopharmacological importance: Cecropia obtusifolia Bertol (Cecropiaceae) is a plant extensively used for the empirical treatment of type 2 diabetes in México. Although some of its hypoglycemic principles have been described, their mechanisms of action remain unclear. Aim of the study: To investigate the anti-diabetic mechanisms of Cecropia obtusifolia aqueous extract (CAE) and its active compo ...
DOI:
10.1016/j.jep.2008.09.019

29. Cembrane Diterpenes from the Gorgonian Leptogorgia laxa

Author:
Ortega, María J.; Zubía, Eva; Sánchez, M. Carmen; Carballo, J. Luis
Source:
Journal of natural products 2008 v.71 no.9 pp. 1637-1639
ISSN:
0163-3864
Subject:
humans; cytotoxicity; anticarcinogenic activity; cultured cells; diterpenoids; spectral analysis; chemical structure; Anthozoa; Mexico
DOI:
10.1021/np8002639
PubMed:
18698819

30. Changing the U.S. Sugar Program into a Standard Crop Program: Consequences under the North American Free Trade Agreement and Doha

Author:
Abler, David; Beghin, John C.; Blandford, David; Elobeid, Amani
Source:
Review of agricultural economics 2008 v.30 no.1 pp. 82-102
ISSN:
1058-7195
Subject:
North American Free Trade Agreement; agricultural economics; sugars; trade liberalization; Mexico
Abstract:
... We analyze the impact of continuing the existing U.S. sugar program, replacing it with a standard program, and implementing the standard program with multilateral trade liberalization. Under the North American Free Trade Agreement (NAFTA), duty-free sugar imports from Mexico could undermine the program's ability to operate on a "no-cost" basis to taxpayers as large public stocks of sugar could acc ...
DOI:
10.1111/j.1467-9353.2007.00393.x

31. Characterization of kinetic parameters and the formation of volatile compounds during the tequila fermentation by wild yeasts isolated from agave juice

Author:
Arellano, Melchor; Pelayo, Carlos; Ramírez, Jesús; Rodriguez, Ingrid
Source:
Journal of industrial microbiology & biotechnology 2008 v.35 no.8 pp. 835-841
ISSN:
1367-5435
Subject:
starter cultures; Agave tequilana; alcoholic fermentation; yeasts; alcoholic beverages; Saccharomyces cerevisiae; acetaldehyde; distillation; odor compounds; kinetics; ethanol; Mexico
Abstract:
... The production of aroma compounds during tequila fermentation using four native yeast strains isolated from agave juice was quantified at controlled (35 °C) and uncontrolled temperatures (room temperature) by gas chromatography (FID). Three of the four strains were identified as Saccharomyces cerevisiae (MTLI 1, MALI 1 and MGLI 1) and one as Kloeckera apiculata (MALI 2). Among the aroma compounds ...
DOI:
10.1007/s10295-008-0355-4
PubMed:
18449588

32. Characterization of the microflora isolated from queso fresco made from raw and pasteurized milk

Author:
Renye, J.A.; Somkuti, G.A.; Vallejo-Cordoba, B.; Van Hekken, D.L.; Gonzalez-Cordova, A.F.
Source:
Journal of food safety 2008 v.28 no.1 pp. 59-75
ISSN:
0149-6085
Subject:
sequence analysis; coliform bacteria; Leuconostoc mesenteroides; coagulase negative staphylococci; raw milk; lactic acid bacteria; polymerase chain reaction; selective media; Enterococcus; cheeses; Lactococcus lactis; food pathogens; molecular systematics; pasteurized milk; cheese starters; Mexico
Abstract:
... This study characterized the microflora present in four Queso Fresco-style cheeses made from raw milk (RM) and two cheeses made from pasteurized milk (PM) obtained directly from six different producers in Mexico. Microbial isolates were initially analyzed on 8 different selective media and further analyzed by 16S rRNA gene sequence analysis. Sequence analysis identified Lactococcus lactis ssp. lac ...
DOI:
10.1111/j.1745-4565.2007.00095.x

33. Cheating on a Mutualism: Indirect Benefits of Ant Attendance to a Coccidophagous Coccinellid

Author:
Liere, H.; Perfecto, I.
Source:
Environmental entomology 2008 v.37 no.1 pp. 143-149
ISSN:
0046-225X
Subject:
Azteca; Coccinellidae; Coccus viridis; scale insects; mutualism; predatory insects; predator-prey relationships; predation; aggression; defensive secretions; natural enemies; parasitoids; parasitism; Coffea; Mexico
Abstract:
... Coccinellids (Coleoptera: Coccinellidae) are generally unable to prey on ant-tended prey. However, particular coccinellid species have morphological, behavioral, or chemical characteristics that render them immune to ant attacks, and some species are even restricted to ant-tending areas. The benefit gained from living in close association with ants can be twofold: (1) gaining access to high-densit ...
DOI:
10.1603/0046-225X(2008)37[143:COAMIB]2.0.CO;2
PubMed:
18348805

34. Checklist of the freshwater fishes of Colombia

Author:
Javier A. Maldonado-Ocampo; Richard P. Vari; José Saulo Usma
Source:
Biota Colombiana 2008 v.9 no.2 pp. -
ISSN:
2539-200X
Subject:
Characidae; Cichlidae; Gymnotiformes; Loricariidae; Pimelodidae; Trichomycteridae; climate; fauna; freshwater; freshwater fish; geology; hydrochemistry; marine fish; new species; Argentina; Chile; Colombia; Mexico
Abstract:
... Data derived from the literature supplemented by examination of specimens in collections show that 1435 species of native fishes live in the freshwaters of Colombia. These species represent 14 orders and 47 families. Orders with the largest numbers of species in the Colombian continental ichthyofauna are the Characiformes (637 species), Siluriformes (524 species), Perciformes (124 species), and Gy ...
DOI:
10.21068/bc.v9i2.201

35. Chlorella sorokiniana UTEX 2805, a heat and intense, sunlight-tolerant microalga with potential for removing ammonium from wastewater

Author:
de-Bashan, Luz E.; Trejo, Adan; Huss, Volker A.R.; Hernandez, Juan-Pablo; Bashan, Yoav
Source:
Bioresource technology 2008 v.99 no.11 pp. 4980-4989
ISSN:
0960-8524
Subject:
Azospirillum brasilense; Chlorella sorokiniana; air temperature; bacteria; environmental factors; genes; heat; light intensity; microalgae; nucleotide sequences; pigments; ribosomal RNA; solar radiation; summer; surface water; synthetic populations; waste lagoons; wastewater; wastewater treatment; water temperature; Mexico
Abstract:
... In the summer of 2003, a microalga strain was isolated from a massive green microalgae bloom in wastewater stabilization ponds at the treatment facility of La Paz, B.C.S., Mexico. Prevailing environmental conditions were air temperatures over 40°C, water temperature of 37°C, and insolation of up to 2400μmolm² s⁻¹ at midday for several hours at the water surface for four months. The microalga was i ...
DOI:
10.1016/j.biortech.2007.09.065
PubMed:
18024023

36. Chloroplast DNA polymorphism reveals geographic structure and introgression in the Quercus crassifolia x Quercus crassipes hybrid complex in Mexico

Author:
Tovar-Sánchez, E.; Mussali-Galante, P.; Esteban-Jiménez, R.; Piñero, D.; Arias, D.M.; Dorado, O.; Oyama, K.
Source:
Botany 2008 v.86 no.3 pp. 228-239
ISSN:
1916-2804
Subject:
microsatellite repeats; forest trees; Quercus; haplotypes; temperate forests; chloroplast DNA; geographical variation; phylogeography; interspecific hybridization; population structure; genetic polymorphism; introgression; Mexico
DOI:
10.1139/B07-128

37. Cholesterol oxidation in traditional Mexican dried and deep-fried food products

Author:
Soto-Rodríguez, I.; Campillo-Velázquez, P.J.; Ortega-Martínez, J.; Rodríguez-Estrada, M.T.; Lercker, G.; Garcia, H.S.
Source:
Journal of food composition and analysis 2008 v.21 no.6 pp. 489-495
ISSN:
0889-1575
Subject:
dried meat; pork; hides and skins; traditional foods; carcinogens; food composition; solid phase extraction; cytotoxins; capillary gas chromatography; food analysis; oxidation; salted foods; fried foods; saponification; water content; cuisine; cholesterol; beef; shrimp; water activity; Mexico
Abstract:
... A number of animal and in vitro studies have demonstrated that cholesterol oxidation products (COPs) are the primary factor that triggers the atherosclerotic lesion. Furthermore, it has been recognized that several COPs have carcinogenic, cytotoxic and mutagenic effects. Although some works have reported the presence of COPs in a number of dried and deep-fried foods, other high-risk food products ...
DOI:
10.1016/j.jfca.2008.03.008

38. Chronic hypoglycemic effect of Malmea depressa root on n5-streptozotocin diabetic rats

Author:
Andrade-Cetto, Adolfo; Martínez-Zurita, Eddy; Soto-Constantino, Ana; Revilla-Monsalve, Cristina; Wiedenfeld, Helmut
Source:
Journal of ethnopharmacology 2008 v.116 no.2 pp. 358-362
ISSN:
0378-8741
Subject:
Annonaceae; diabetes; hormone secretion; forest trees; dose response; glycemic effect; medicinal plants; plant extracts; blood glucose; dosage; animal models; insulin; rats; medicinal properties; roots; Mexico
Abstract:
... The root of the “Elemuy” tree (Malmea depressa) is highly used in south east Mexico by the Mayan communities to treat type 2 diabetes. The long-term hypoglycemic effect (HbA1c) and the stimulation of insulin secretion resulting from the treatment with butanolic extract was studied using (n5-stz)-induced diabetic rats. We show that after 30 days of daily administration of 10mg/kg of the butanolic e ...
DOI:
10.1016/j.jep.2007.11.043
PubMed:
18242024

39. Climate Patterns Governing the Presence and Permanence of Salmonellae in Coastal Areas of Bahia de Todos Santos, Mexico

Author:
Simental, Lourdes; Martinez-Urtaza, Jaime
Source:
Applied and environmental microbiology 2008 v.74 no.19 pp. 5918-5924
ISSN:
0099-2240
Subject:
geographical distribution; arid zones; correlation; solar radiation; Salmonella; serotypes; marine environment; environmental factors; streams; foodborne illness; seawater; coasts; temperature; molluscs; runoff; bacteria; Brazil; Mexico
Abstract:
... Despite the importance of salmonellae as one of the major causes of food-borne infections worldwide, data regarding the presence of these organisms in the environment are limited. We investigated the presence of Salmonella spp. in Bahia de Todos Santos (Baja California, Mexico) and evaluated the environmental factors that affect the occurrence of Salmonella spp. in this arid region. A total of 1,3 ...
DOI:
10.1128/AEM.01139-08
PubMed:
18708509
PubMed Central:
PMC2565968

40. Clinical dental findings in 203 working donkeys in Mexico

Author:
Du Toit, Nicole; Burden, Faith A.; Dixon, Padraic M.
Source:
Veterinary journal 2008 v.178 no.3 pp. 380-386
ISSN:
1090-0233
Subject:
asses; animal diseases; tooth diseases; disease prevalence; working animals; risk factors; epidemiological studies; disease surveillance; lesions (animal); tooth enamel; animal pathology; parasitoses; animal age; animal husbandry; animal care equipment; body condition; climatic factors; veterinary dentistry; animal well-being; Mexico
Abstract:
... Clinical dental examinations of 203 unsedated working donkeys in tropical and temperate climatic areas in Mexico revealed a high prevalence (62%) of dental disease with sharp enamel points present in 98% of the animals. More significant dental disorders (diastemata, 4%; overgrown teeth, 18%; worn teeth, 16%; missing teeth, 0.5%; displaced teeth, 1.5%; fractured teeth, 2%) with welfare implications ...
DOI:
10.1016/j.tvjl.2008.09.013
PubMed:
18977674

41. Clusters of ant colonies and robust criticality in a tropical agroecosystem

Author:
Vandermeer, J.; Perfecto, I.; Philpott, S.M.
Source:
Nature 2008 v.451 no.7177 pp. 457-459
ISSN:
0028-0836
Subject:
dispersal behavior; insect colonies; agroecosystems; plantations; parasitoids; Azteca; parasitism; Phoridae; spatial distribution; tropics; Coffea arabica; population density; Mexico
Abstract:
... Although sometimes difficult to measure at large scales, spatial pattern is important in natural biological spaces as a determinant of key ecological properties such as species diversity, stability, resiliency and others. Here we demonstrate, at a large spatial scale, that a common species of tropical arboreal ant forms clusters of nests through a combination of local satellite colony formation an ...
DOI:
10.1038/nature06477
PubMed:
18216853

42. The Collection and Sale of Wild Mushrooms in a Community of Tlaxcala, Mexico

Author:
Montoya, Adriana; Hernández, Nuri; Mapes, Cristian; Kong, Alejandro; Estrada-Torres, Arturo
Source:
Economic botany 2008 v.62 no.3 pp. 413-424
ISSN:
0013-0001
Subject:
mushrooms; food marketing; prices; temperate forests; Boletus; Lyophyllum; seasonal variation; Hebeloma; Amanita; human food chain; wild foods; economic impact; Mexico
DOI:
10.1007/s12231-008-9021-z

43. Community Member Viewpoints on the Ría Celestún Biosphere Reserve, Yucatan, Mexico: Suggestions for Improving the Community/Natural Protected Area Relationship

Author:
Jessica Méndez-Contreras; Federico Dickinson; Teresa Castillo-Burguete
Source:
Human ecology 2008 v.36 no.1 pp. 111-123
ISSN:
0300-7839
Subject:
attitudes and opinions; community service; conservation areas; environmental protection; fathers; interviews; teams; Mexico
Abstract:
... The results of an analysis of the viewpoints of Celestún community members regarding the Ría Celestún Biosphere Reserve, Mexico, are used as the basis for recommendation to improve the community/natural protected area (NPA) relationship. Participant observation was used to record the opinions of 80 people (8–83 years of age) between April and August 2002. Twenty semistructured interviews were held ...
DOI:
10.1007/s10745-007-9135-4

44. Community involvement in marine protected areas: The case of Puerto Morelos reef, México

Author:
Rodríguez-Martínez, R.E.
Source:
Journal of environmental management 2008 v.88 no.4 pp. 1151-1160
ISSN:
0301-4797
Subject:
nongovernmental organizations; decision making; reefs; oceans; citizen participation; problem solving; environmental policy; stakeholders; environmental protection; conservation areas; government agencies; Mexico
DOI:
10.1016/j.jenvman.2007.06.008

45. Comparative Genomic Analysis of Clinical Strains of Campylobacter jejuni from South Africa

Author:
Beatriz Quiñones; Magalie R. Guilhabert; William G. Miller; Robert E. Mandrell; Albert J. Lastovica; Craig T. Parker; Srikanth Tripathy
Source:
PloS one v.3 no.4 pp. -
ISSN:
1932-6203
Subject:
gastroenteritis; genomic islands; heat stability; peripheral nervous system diseases; serotypes; multilocus sequence typing; DNA microarrays; disease outbreaks; genes; genomics; enteritis; DNA fingerprinting; patients; Campylobacter jejuni; Canada; South Africa; Mexico
Abstract:
... Campylobacter jejuni is a common cause of acute gastroenteritis and is also associated with the post-infectious neuropathies, Guillain-Barré and Miller Fisher syndromes. In the Cape Town area of South Africa, C. jejuni strains with Penner heat-stable (HS) serotype HS∶41 have been observed to be overrepresented among cases of Guillain-Barré syndrome. The present study examined the genetic content o ...
DOI:
10.1371/journal.pone.0002015
PubMed:
18431496
PubMed Central:
PMC2292242

46. Comparative Molecular Analysis of Endoevaporitic Microbial Communities

Author:
Sahl, Jason W.; Pace, Norman R.; Spear, John R.
Source:
Applied and environmental microbiology 2008 v.74 no.20 pp. 6444-6446
ISSN:
0099-2240
Subject:
lakes; microbial communities; nucleotide sequences; phylogeny; ribosomal RNA; sequence analysis; Mexico; New Mexico
Abstract:
... A phylogenetic comparison of microbial communities in hypersaline evaporites was conducted on crusts from Guerrero Negro, Mexico, and Lindsey Lake, New Mexico, using culture-independent rRNA gene sequence analysis. Many sequences were shared between evaporites, which suggests that similar environments select for specific microbial lineages from a global metacommunity. ...
DOI:
10.1128/AEM.00879-08
PubMed:
18757573
PubMed Central:
PMC2570308

47. Comparison of ground-based and remotely-sensed surface soil moisture estimates over complex terrain during SMEX04

Author:
Vivoni, Enrique R.; Gebremichael, Mekonnen; Watts, Christopher J.; Bindlish, Rajat; Jackson, Thomas J.
Source:
Remote sensing of environment 2008 v.112 no.2 pp. 314-325
Subject:
soil water content; remote sensing; spatial variation; temporal variation; radiometers; equipment performance; topography; Mexico
Abstract:
... Comparisons to ground-based surface soil moisture estimates are necessary to evaluate the capability of remote sensors to determine soil moisture and its spatiotemporal variability. Soil moisture can be especially variable in regions of complex terrain which exhibit large variations in vegetation, soil properties and hydrologic conditions. The objective of this study is to evaluate the spatiotempo ...
Handle:
10113/38576
DOI:
10.1016/j.rse.2006.10.028

48. Composition of spider prey captured by the wasp Trypoxylon (Trypargilum) tridentatum tridentatum in two habitats in an oasis in Baja California Sur, Mexico

Author:
Dominguez, K.; Jimenez, M.L.
Source:
Canadian entomologist 2008 v.140 no.3 pp. 388-392
ISSN:
0008-347X
Subject:
Trypoxylon; predatory insects; predator-prey relationships; Araneae; species diversity; habitats; mesic conditions; dry environmental conditions; oases; arid lands; new geographic records; Mexico

49. Conservation hotspots of biodiversity and endemism for Indo‐Pacific coral reef fishes

Author:
Gerald R. Allen
Source:
Aquatic conservation 2008 v.18 no.5 pp. 541-556
ISSN:
1052-7613
Subject:
biodiversity; corals; fish; geographic information systems; surface area; Australia; Borneo; Fiji; Galapagos Islands; Hawaii; Indonesia; Japan; Malaysia; Mexico; New Caledonia; Papua New Guinea; Philippines; Red Sea; Solomon Islands; Taiwan; Vanuatu
Abstract:
... 1. Distribution patterns of 3919 species of Indo‐Pacific reef fishes were analysed using GIS mapping software for the purpose of conservation prioritization of extraordinary high concentrations (‘hotspots’) of diversity and endemism. 2. Megadiversity countries with more than 1000 coral reef species include Indonesia, Australia, Philippines, Papua New Guinea, Malaysia, Japan, Taiwan, Solomon Island ...
DOI:
10.1002/aqc.880

50. Conservation of Neotropical carnivores under different prioritization scenarios: mapping species traits to minimize conservation conflicts

Author:
Loyola, Rafael D.; de Oliveira, Guilherme; Diniz-Filho, José Alexandre Felizola; Lewinsohn, Thomas M.
Source:
Diversity & distributions 2008 v.14 no.6 pp. 949-960
ISSN:
1366-9516
Subject:
Carnivora; algorithms; anthropogenic activities; biogeography; body size; carnivores; ecoregions; extinction; phylogeny; planning; prioritization; rain forests; rare species; reserve networks; risk; tropics; Amazonia; Andes region; Chile; Costa Rica; Mexico
Abstract:
... To define priority sets of ecoregions that should be sufficiently covered in a reserve system to represent all Neotropical carnivores (Mammalia: Carnivora) under three distinct conservation scenarios. The Neotropical region. We used broad-scale biogeographical data of species distribution to define priority sets of ecoregions for conservation of carnivores and mapped four species traits (phylogene ...
DOI:
10.1111/j.1472-4642.2008.00508.x