Las heliconias son plantas ornamentales tropicales apreciadas por sus inflorescencias de formas exóticas y colores brillantes. Su cultivo requiere sistemas propagación como la embriogénesis somática, que permitan clonar genotipos élite generar suficiente material vegetativo calidad fitosanitaria certificada. El objetivo esta investigación fue establecer un protocolo somática para Heliconia coll...

In this talk I will review the concept of the biembedding of two latin squares. Of particular interest will be the regular biemedding of two isomorphic copies of the latin square corresponding to the cyclic group of order n, denoted Cn. Grannell and Griggs have shown that, for all n, a regular biembedding exists, and in addition, that the automorphism group of the regular biembedding has order ...

We establish new lower and upper bounds for the real number graph labelling problem. As an application, we completely determine the optimum spans of L(p, q)-labellings of the infinite triangular plane lattice (solving an open problem of Griggs).

High pressure and temperature experiments are necessary to understand geological processes at deep earth conditions. Here, we present a new generation Griggs-type apparatus, designed perform deformation P-T conditions of the lower crust upper mantle, i.e. up 5 GPa 1000 °C. We first detail experimental design, set-up procedure, as well calibration protocol apparatus. The main innovation this is ...

We discuss a conjecture of J. R. Griggs relating the maximum number of leaves in a spanning tree of a simple, connected graph to the order and independence number of the graph. We prove a generalization of this conjecture made by the computer program Graffiti, and discuss other similar conjectures, including several generalizations of the theorem that the independence number of a simple, connec...

Thirty-one patients (age 64 ± 13 [mean ± SD]) were enrolled, PDT were performed in three groups, 10 Ciaglia Blue Rhino (Cook), 10 PercuTwist (Rüsch) – a device employing a screw with a hydrophilic coating and 11 GWDF – using Griggs' specially designed dilational forceps (Portex). Duration of intervention, oxygenation parameters, blood loss and further complications peri-interventionally and pos...

Title Page Title: To What Extent Does the Responsive Classroom Approach Modify Fifth Grade Students' Efficacy and Anxiety in Mathematics and Science? Author(s): Marissa Swaim Griggs, Sara E. Rimm-Kaufman, Eileen G. Merritt, Christine L. Patton; University of Virginia SREE Fall 2011 Conference Abstract Template