Abstract Polycyclic aromatic hydrocarbons (PAHs) are among the most hazardous organic pollutants due to their toxic, carcinogenic, mutagenic properties, wide distribution, recalcitrance and stability in environment. The study objective is determine impact of species composition tree stands on PAH accumulation urban forest soils Krakow. compared deciduous coniferous similar biodegradation. Basic...

We have undertaken to study the problems which arise in the tight coupling of computer algebra systems. By this we mean having multiple computer algebra systems share the same address space so that objects created by one system can be passed passed by reference in calls to another system. As an interesting practical problem, we have explored the case of using Aldor code from within the Maple sy...

Chlorophyll breakdown is a hallmark of leaf senescence and a major contributor to the emergence of the fall colors. Strikingly, essential pieces of the puzzle of this biological phenomenon have been solved only within the last two decades. A breakthrough was the identification and structure elucidation of a colorless tetrapyrrolic chlorophyll catabolite, thereafter named Hv-NCC-1. The further c...

A fungus isolated from Norway maple (Acer platanoides) in the Boston, Massachusetts, area was determined to be a species of Glomerella, the teleomorph of Colletotrin chum acutatum. Pure cultures of the fungus were obtained from discharged ascospores from perithecia in leaf tissue. This fungus was determined to be homothallic based on the observation of perithecial development in cultures of sin...

The proteome of zygotic embryos of Acer platanoides L. was analyzed via high-resolution 2D-SDS-PAGE and MS/MS in order to: (1) identify significant physiological processes associated with embryo development; and (2) identify changes in the proteome of the embryo associated with the acquisition of seed dormancy. Seventeen spots were identified as associated with morphogenesis at 10 to 13 weeks a...

Maple syrup is a natural sweetener that is commonly consumed worldwide. While maple syrup mainly comprises sucrose, it also contains phytochemicals that present various biological effects. Maple syrup is made by boiling down sap, and its color and composition vary in accordance with the sap collection season. Typically, seasonal progression is associated with darker syrup color, and antioxidant...

Maple is a comprehensive general purpose computer algebra system. It is used primarily in education and scientific research in the sciences, in mathematics, and in engineering. Maple can do both symbolic and numerical calculations and has facilities for 2 and 3-dimensional graphical output. The newest version of Maple, Maple V Release 2, sports a new user interface that integrates these three f...