What’s in a weld?

Investigation of welded materials for various applications in industry is of paramount importance. There are various test methods available to test the quality of welds such as destructive methods and methods whereby the material remains undamaged such as the use of images created by Rontgen rays.

Basics of Light Microscopy 5 - About Plan Apos

For sure, a genuine rendition of color is a basic demand on any light microscope. Using white light as the inspection tool for microscopic samples causes a high challenge on the microscope optics. Different wavelengths set different focal points, and this Chromatic Aberration (greek: χρωμα chroma = color and latin: aberrare = deviation) has to be compensated by combining lenses of different shape and different glass types.

In this sense, the Plan Apochromatic lens correction represents the highest level of color reproduction. Here the focal point for several wavelengths has been brought together by a clever combination of different lenses, resulting in a lack of colored fringes around phenomenon borders. 

Chromatic Aberration

Malaria

Malaria has been recognized since the Greek and Roman civilizations over 2,000 years ago, with different patterns of fever described by the early Greeks. Malaria is the most important tropical disease known to man. It remains a significant problem in many tropical areas, especially in sub-Saharan Africa. Malaria is spreading as a result of environmental changes, including global warming, civil disturbances, increasing travel and drug resistance. There are approximately 100 million cases of malaria worldwide with about 1 million of these proving fatal.

Gooseberries under attack

Powdery mildew (Sphaerotheca mors-uvae) severely infects young shoots, stems and fruits of gooseberry (Ribes uva-crispa). Environmental friendly and biological control measures are being sought throughout the world. Especially in organic currant growing, effective control measures are needed, because powdery mildew infections may result in a total loss of the crop. In organic currant growing the number of adequate control methods is very limited.