Agropastoral herding practices and grazing behaviour of cattle in the subhumid zone of Nigeria

Examines the consequences for cattle husbandry of livestock-crop integration as practiced in an agropastoral production system in the sub-humid zone of Nigeria - based on a study of herding practices and cattle grazing behaviour

Traditional small ruminant production in the subhumid zone of Nigeria

Review & presents new data on the management, flock structure, fertility, young & adult mortality, birth weight & growth rate and productivity indices of sheep and goats under traditional systems of production in subhumid Nigeria. Includes estimates of sheep & goats numbers, type of breeds and nutritional status

Agropastoral herding practices and the grazing behaviour of cattle

Presents results of a study of grazing behaviour and forage resources utilisation by herded cattle belonging to agropastoralists at Abet & Kurmin Biri in the subhumid zone of Nigeria as well time spent on walking, resting & watering. Subdivides grazing activities into natural range grazing, browsing, grazing of crop residues and of burnt areas

Antifouling bastadin congeners target blue mussel phenoloxidase and complex copper(II) ions

Synthetically prepared congeners of spongederived bastadin derivatives such as 5,5'-dibromohemibastadin- 1 (DBHB) that suppress the settling of barnacle larvae were identified in this study as strong inhibitors of blue mussel phenoloxidase that is involved in the firm attachment of mussels to a given substrate. The IC50 value of DBHB as the most active enzyme inhibitor encountered in this study amounts to 0.84 mu M. Inhibition of phenoloxidase by DBHB is likely due to complexation of copper(II) ions from the catalytic centre of the enzyme by the a-oxo-oxime moiety of the compound as shown here for the first time by structure activity studies and by X-ray structure determination of a copper(II) complex of DBHB.Biotechnology & Applied MicrobiologyMarine & Freshwater BiologySCI(E)EI0ARTICLE61148-11581

Division, adjoints, and dualities of bilinear maps

The distributive property can be studied through bilinear maps and various morphisms between these maps. The adjoint-morphisms between bilinear maps establish a complete abelian category with projectives and admits a duality. Thus the adjoint category is not a module category but nevertheless it is suitably familiar. The universal properties have geometric perspectives. For example, products are orthogonal sums. The bilinear division maps are the simple bimaps with respect to nondegenerate adjoint-morphisms. That formalizes the understanding that the atoms of linear geometries are algebraic objects with no zero-divisors. Adjoint-isomorphism coincides with principal isotopism; hence, nonassociative division rings can be studied within this framework. This also corrects an error in an earlier pre-print; see Remark 2.11

The Cost of Biotechnology Regulation in the Philippines

This paper identifies direct costs and opportunity costs of bio-safety regulation for four transgenic products in the Philippines: Bt eggplant, Bt rice, ringspot-virus resistant papaya, and virus resistant tomatoes. It finds that direct regulatory costs while significant, are generally smaller than the research costs for technology development. However, both research and regulatory costs are overshadowed by even a relatively brief delay in product release, which may occur due to unexpected regulatory delays.Food Consumption/Nutrition/Food Safety, Research and Development/Tech Change/Emerging Technologies,

(Bi-)Cohen-Macaulay simplicial complexes and their associated coherent sheaves

Via the BGG correspondence a simplicial complex Delta on [n] is transformed into a complex of coherent sheaves on P^n-1. We show that this complex reduces to a coherent sheaf F exactly when the Alexander dual Delta^* is Cohen-Macaulay. We then determine when both Delta and Delta^* are Cohen-Macaulay. This corresponds to F being a locally Cohen-Macaulay sheaf. Lastly we conjecture for which range of invariants of such Delta it must be a cone.Comment: 16 pages, some minor change

Structural and stratigraphic evaluation of the southern Belgian anticline area, north Midway-Sunset field, San Joaquin Basin, California

Accompanied by 13 folded plates in pocket.Thesis (M.S.)--University of Oklahoma, 2007.Includes bibliographical references (leaves 208-213).The Midway-Sunset field is located in the West Side fold belt in the San Joaquin Basin of California. The structures in the area, including the Midway-Sunset, Buena Vista, and Elk Hills anticlines, were formed during multiple episodes of compressive deformation, separated by periods of extension, between the Upper Miocene and present. A regional study of a 250 square mile area was conducted to understand the structure and stratigraphy within the fields on these structures. The study utilized existing geologic maps and data from over 400 wells to construct three regional structural and seven stratigraphic cross sections. One of the structural sections was kinematically reconstructed through time to understand the tectonic history. The Midway-Sunset and Buena Vista structures are interpreted as a series of parallel, fault-bounded structures, cored by deeper fault-bend folds. Many of the larger structures display overturned or steep flanks. Some of the reservoir units, such as the Stevens and Potter deep water turbidite sandstones, were deposited in an active tectonic environment, so that the depositional history is closely related to the structural events. A more detailed structural-stratigraphic study was conducted to evaluate an approximately 15 square mile area within the Southern Belgian anticline. A three-dimensional structural model was constructed using five closely-spaced balanced structural cross sections constrained by dipmeter logs and surface structural data. This structural model will provide a tool to evaluate potential bypassed reservoirs in the Potter Sandstone, and new targets in deeper reservoirs

Electric field control and optical signature of entanglement in quantum dot molecules

The degree of entanglement of an electron with a hole in a vertically coupled self-assembled dot molecule is shown to be tunable by an external electric field. Using atomistic pseudopotential calculations followed by a configuration interaction many-body treatment of correlations, we calculate the electronic states, degree of entanglement and optical absorption. We offer a novel way to spectroscopically detect the magnitude of electric field needed to maximize the entanglement.Comment: 4 pages, 6 figure

Nonpoint Sources of Pollution: The Emerging Issue in Water Control Management for Dallas/Fort Worth, Texas

Paper by John Promise and Charles W. Baye