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Search Results: 1 - 10 of 147448 matches for " F. Roland "
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Notes on Neottiglossa Trilineata Kirby (Hemiptera, Pentatomid )
Roland F. Hussey
Psyche , 1922, DOI: 10.1155/1922/48697
Hemipterological Notes
Roland F. Hussey
Psyche , 1922, DOI: 10.1155/1922/92758
A Bibliographical Notice on the Reduviid Genus Triatoma (Hemip.)
Roland F. Hussey
Psyche , 1922, DOI: 10.1155/1922/60706
Distributional Notes on Hemiptera, With theDescription of a New Gerris
Roland F. Hussey
Psyche , 1921, DOI: 10.1155/1921/57216
Debate sobre o artigo de Regina Cele de A. Bodstein
Schramm F. Roland
Cadernos de Saúde Pública , 1997,
Bioética nos anos 90
Schramm F. Roland
Cadernos de Saúde Pública , 1996,
Memory and self-induced shocks in an evolutionary population competing for limited resources
Roland Kay,Neil F. Johnson
Quantitative Biology , 2003, DOI: 10.1103/PhysRevE.70.056101
Abstract: We present a detailed discussion of the role played by memory, and the nature of self-induced shocks, in an evolutionary population competing for limited resources. Our study builds on a previously introduced multi-agent system [Phys. Rev. Lett 82, 3360 (1999)] which has attracted significant attention in the literature. This system exhibits self-segregation of the population based on the `gene' value p (where 0<=p<=1), transitions to `frozen' populations as a function of the global resource level, and self-induced large changes which spontaneously arise as the dynamical system evolves. We find that the large, macroscopic self-induced shocks which arise, are controlled by microscopic changes within extreme subgroups of the population (i.e. subgroups with `gene' values p~0 and p~1).
Evaluation of the Acetone and Aqueous Extracts of Mature Stem Bark of Sclerocarya birrea for Antioxidant and Antimicrobial Properties
Nicoline F. Tanih,Roland N. Ndip
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/834156
Abstract: We assayed the antimicrobial activity of acetone and aqueous extracts of the stem bark of Sclerocarya birrea on some selected bacteria and fungi species including; Streptococcus pyogenes, Plesiomonas shigelloides, Aeromonas hydrophila, Salmonella typhimurium, Cryptococcus neoformans, Candida glabrata, Trichosporon mucoides, and Candida krusei using both agar well diffusion and minimum inhibitory concentration (MIC) assays. Based on the levels of activity, the acetone extract was examined for total polyphenolic content, radical scavenging and antioxidant activities. Total phenols of the extract were determined spectrophotometrically. The antioxidant activity was determined by the DPPH, ABTS and reducing power. All the bacteria and fungi species were susceptible to the plant extracts. The acetone extract was the most active for the bacterial species with MIC (0.156–0.625 mg/mL) while the aqueous extract was the most active for the fungi species with MIC (0.3125–1.25 mg/mL). The polyphenolic compounds were found as 27.2 mg/g tannic acid equivalent, 25.2 mg/g quercetin equivalent, 9.1 mg/g quercetin equivalent for phenols, flavonoid and flavonols respectively. The acetone extract exhibited a remarkable ability to scavenge radicals, strong reducing ability and a potential source of natural antioxidants. Both the acetone and aqueous extracts of S. birrea may provide a target for drug discovery.
The Effects of Aqueous Extracts of Acalypha wilkesiana Supplementation and Exercise Training on Hematopoietic System in Rats  [PDF]
Alfred F. Ehiaghe, Joy I. Ehiaghe, Igere E. Bright, Iyen I. Roland
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.49225

The aim of this study is to compare the effects of single and combined oral administration of fresh aqueous extracts of Acalypha wilkesiana supplementation at 300 mg/ml and exercise training on some immuno indicator parameters in Rats. The study was carried out in the College of Health Sciences, Department of Hematology, Igbinedion University, Okada between the Month of June and July, 2012. Following 30 days post-oral administration of extracts on (Group 2 and Group 3), exercise training on (Group 2 and Group 4) and No treated on Group 1, hematological parameters were determined using the sysmex® Automated Hematological Analyzer, while CD4 and CD8 cells were estimated using Partec cyflow counter and serum IgG is determined using the ELISA Method. CD4 cells, CD8, and Total WBC count show a statistically significant increase while Hb concentration and IgG level show a statistically significant decrease in Group 2 and Group 4 (P < 0.05). Total WBC count shows a statistically significant increase against the control Group, while CD4 cell, CD8 cell count, Hb-concentration and IgG level show a statistically insignificant increase (P > 0.05), Table 2. Acalypha wilkesiana at a concentration of 300

Characterizing Multiple Solutions to the Time-Energy Canonical Commutation Relation via Quantum Dynamics
Roland Cristopher F. Caballar,Eric A. Galapon
Physics , 2010, DOI: 10.1016/j.physleta.2009.05.068
Abstract: We address the multiplicity of solutions to the time-energy canonical commutation relation for a given Hamiltonian. Specifically, we consider a particle spatially confined in a potential free interval, where it is known that two distinct self-adjoint and compact time operators conjugate to the system Hamiltonian exist. The dynamics of the eigenvectors of these operators indicate that different time operators posses distinguishing properties that can unambiguously associate them to specific aspects of the quantum time problem.
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