Life Sciences Commons^™

Rumen Degradation Characteristics Of Four Species Of Native Pastures From Central Mexico In Three Growing Periods, A. A. Rayas, A. M. J. Espinoza‐Ortega, J. G. Estrada‐Flores, C. Arriagal, F. Mould, O. A. Castelán-Ortega

IGC Proceedings (1997-2023)

The smallholder cattle systems of the Toluca valley in central Mexico are based on the use of maize and native grasses. Research has been devoted to nutritional characterisation of improved pastures, but native species of grasses have not been studied, despite their importance. The aim of this experiment was to evaluate the in vitro rumen degradation kinetics of four species of native pastures.

Forage News [2022-06], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

No abstract provided.

Action Plan For The International Year Of Rangelands And Pastoralists (Iyrp): The Case For The United States, Canada, And Mexico, Barry Irving, Larry Howery, Jürgen Hoth, Jess Peterson

IGC Proceedings (1997-2023)

The GAP analysis (A Case of Benign Neglect: Knowledge gaps about sustainability in rangelands and pastoralism) points to several gaps that are relevant to the US, Canada and Mexico. North American rangelands span the ecological continuum of polar to hot deserts and arid to humid climates that exhibit highly variable ecological and forage production potential across time and space. Although there is a great deal of rangeland research, extension, and inventory capacity in all three countries, a weak link is the dissemination of information to North American pastoralists (conventionally referred to as ranchers or producers). Although the extension system in …

Heritability And Genetic Correlations Of Forage Yield Traits In Alfalfa (Medicago Sativa L.) For Central Valley Of Mexico, B. Alarcon‐Zuniga, R. Perdomo‐Gomez

IGC Proceedings (1997-2023)

No abstract provided.

Metabolomics-Based Analysis Of Miniature Flask Contents Identifies Tobacco Mixture Use Among The Ancient Maya, Mario Zimmermann, Korey J. Brownstein, Luis Pantoja Díaz, Iliana Ancona Aragón, Scott R. Hutson, Barry Kidder, Shannon Tushingham, David R. Gang

Anthropology Faculty Publications

A particular type of miniature ceramic vessel locally known as “veneneras” is occasionally found during archaeological excavations in the Maya Area. To date, only one study of a collection of such containers successfully identified organic residues through coupled chromatography–mass spectrometry methods. That study identified traces of nicotine likely associated with tobacco. Here we present a more complete picture by analyzing a suite of possible complementary ingredients in tobacco mixtures across a collection of 14 miniature vessels. The collection includes four different vessel forms and allows for the comparison of specimens which had previously formed part of museum exhibitions with recently …

Range Management Program: “Los Ángeles” Experimental Cattle Ranch In Northern México, Ricardo Vásquez, Silverio G. Pérez

IGC Proceedings (1997-2023)

The arid and semi-arid grasslands of both the ejidos (farming communities) and extensive (private) cattle ranches in northern México face serious degradation problems. This is visibly evident in the extent of soil erosion, loss of biodiversity and invasion of undesirable species (Ceballo et al. 2009). Severe impact of drought and over-grazing are important causes for the declining productivity now common place throughout these north Mexican grasslands. Two important contributing factors to this grassland degradation are: (1) the lack of continuous and well integrated education programs on the range and ranch management; and (2) a scarcity of government and private …

Effect Of Supplementation Of Dairy Cows Under Cut And Carry Or Grazing Of Irrigated Cultivated Pastures In Small Scale Dairy Systems In The Highlands Of Central Mexico, J. Velarde-Guillen, Carloss Manuel Arriaga-Jordan, J. G. Estrada-Flores, A. A. Rayas-Amor, F. Vicente, A. Martinez-Fernandez, D. Heredia-Nava, C. M. Arriaga-Jordan

IGC Proceedings (1997-2023)

Small-scale dairy systems in Mexico represent over 78% of dairy farms and produce 37% of the nation’s milk, and have an important role in reducing rural poverty. Small-scale dairy systems are defined by having herds of 3 to 35 cows plus replacements, and rely mostly on the family for labour. In the central highlands, many small-scale dairy farms base the feeding of herds on irrigated cultivated pastures of ryegrass (Lolium multiflorum, L. perenne) – white clover (Trifolium repens), mostly under cut-and-carry by hand with scythes, straws, and large amounts of commercial compound concentrates that result in …

Cetuximab Plus Carboplatin And Paclitaxel With Or Without Bevacizumab Versus Carboplatin And Paclitaxel With Or Without Bevacizumab In Advanced Nsclc (Swog S0819): A Randomised, Phase 3 Study, Roy S. Herbst, Mary W. Redman, Edward S. Kim, Thomas J. Semrad, Lyudmila Bazhenova, Gregory Masters, Kurt Oettel, Perry Guaglianone, Christopher Reynolds, Anand Karnad, Susanne M. Arnold, Marileila Varella-Garcia, James Moon, Philip C. Mack, Charles D. Blanke, Fred R. Hirsch, Karen Kelly, David R. Gandara

Markey Cancer Center Faculty Publications

Background

EGFR antibodies have shown promise in patients with advanced non-small-cell lung cancer (NSCLC), particularly with squamous cell histology. We hypothesised that EGFR copy number by fluorescence in-situ hybridisation (FISH) can identify patients most likely to benefit from these drugs combined with chemotherapy and we aimed to explore the activity of cetuximab with chemotherapy in patients with advanced NSCLC who are EGFR FISH-positive.

Methods

We did this open-label, phase 3 study (SWOG S0819) at 277 sites in the USA and Mexico. We randomly assigned (1:1) eligible patients with treatment-naive stage IV NSCLC to receive paclitaxel (200 mg/m ²; every …