Purified 2,4-dichlorophenoxyacetic acid (2,4-D)/(alpha)-ketoglutarate dioxygenase (TfdA) was shown to use 4-nitrophenoxyacetic acid (K(infm) = 0.89 (plusmn) 0.04 mM, k(infcat) [catalytic constant] = 540 (plusmn) 10 min(sup-1)), producing intensely yellow 4-nitrophenol. This reagent was used to develop a rapid, continuous, colorimetric assay for the detection of TfdA and analogous activities in ...

Parkia biglobosa (Jacq.) Benth commonly called néré in French-speaking Africa is a semi-domesticated indigenous tree with multi-purpose and highly appreciated use. Its pod-shaped fruits contain yellowish floury pulp, eaten raw or used to make drinks, couscous for cooked dough. The objective of this study was determine the profiles minerals (Fe, K, Mg, Zn, Ca), beta-carotene, prote...

Measurements were made of the surface areas (As) of the skin and gills of larval and juvenile walleye Stizostedion vitreum with a body mass (M) of between 2mg (1 day post hatch) and 2.3g (98 days post hatch). The skin, with a relative surface area (As/M) of approximately 8500mm2g-1, accounted for more than 99.9% of the total surface area (skin + gills) at 1 day post hatch. The relative area of ...

Using an antiserum directed against -aminobutyric acid (GABA) to label neurones with GABA-like immunoreactivity, approximately 70 central neurones (68±9; mean ± s.e.m., N=9) were labelled in the terminal abdominal ganglion of the crayfish Procambarus clarkii. This mean number of neurones with GABA-like immunoreactivity represents approximately 10 % of the total number of neurones ...

This study combines data on changes in cardiovascular variables with body mass (Mb) and with exercise intensity to model the oxygen supply available to birds during flight. Its main purpose is to provide a framework for identifying the factors involved in limiting aerobic power input to birds during flight and to suggest which cardiovascular variables are the most likely to have been influenced...

  Underlying mechanisms which lead to brain edema following ischemic insults have been subjects of much debate. In this study, experimental cerebral infarction was produced in dogs by injecting one or two silicone rubber cylinders through the cervical internal carotid artery. Twenty-four hours after embolization, animals were killed and morphometrical analyses in the capillary endothelial ...

The study investigated microbial population dynamics in soils of Greater Port Harcourt Area, Nigeria. involved the quantification petroleum pollutants and enumeration characterization culturable fungi bacteria. Gas Chromatograph FID method was used to quantify total hydrocarbons (TPH) soil while morphological biochemical tests were characterize microorganisms. highest TPH 9,759.37±883.36...

Microbial biopreparations are actively used to prevent, diagnose, and treat infectious, allergic, tumor, autoimmune diseases in humans animals; stimulate the growth development of plant crops. Natural bacterial strains with valuable technical properties a vital biological resource for developing new rotating already known microbial preparations world market. This study describes natural strain ...