The plasmodium of Physarum polycephalum is renowned for spanning sources of nutrients with networks of protoplasmic tubes. The networks transport nutrients and metabolites across the plasmodium’s body. To imitate a hypothetical colonisation of the world and formation of major transportation routes we cut continents from agar plates arranged in Petri dishes or on the surface of a three-dimension...

[reaction: see text] L-Glycals can be prepared in seven steps from readily available D-glucals, enabling the facile construction of mirror-image carbohydrates such as the L-lactosamine derivative shown above.

Isocaloric adjustments of diet in metabolic experiments tend to induce negative correlations. In free-living populations, on the other hand, the absolute amounts of major nutrients consumed are positively correlated with total calorie intake and with each other. In general, these positive correlations are fairly strong. Relative amounts of nutrients consumed tend to be weakly and negatively cor...

One of the major components of precision agriculture is the precision fertilization. The basic principle of precision fertilization is to adjust the fertilizer input according to the specific circumstances or properties of soils in each location for the least waste and the highest profit. The paper presents a feasible approach for developing the spatial distribution map of soil nutrients based ...

Eutrophication is an increasingly occurring problem that causes degradation of coastal ecosystems worldwide. Traditional monitoring of dissolved nutrients in the water column can be complicated by short term fluctuations, especially when levels of nutrients are low and turnover rapid. A proposed alternative method is the use of macroalgal tissue nutrient concentrations for indication of ambient...

Introduction Human excreta contain plant nutrients and have traditionally been used for crop fertilisation in many countries. In Japan the recycling of urine and faeces was introduced in the 12 Century and in China human and animal excreta have been composted for thousands of years. Urine is the fraction that contains the major part of the nutrients in domestic wastewater, approximately 80% of ...

Two university researchers presented information about Dietary Reference Intake (DRI) research recommendations contained in the Calcium and Related Nutrients Report (IOM, 1997). Bess Dawson-Hughes of Tufts University, who served on the panel for the report, highlighted a number of research recommendations that were considered to be of major importance for each of the five nutrients covered in t...