What is the favoured conformation of the friedelane skeleton? A combined X-ray and molecular force-field study of friedelin, C30H50OFirst page of articledoi:10.1107/S0108768189000467F. MoS. WintherS. N. ScrimgeourActa Crystallographica
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Fundamentally, matter is composed of elementary particles calledquarksandleptons, both of which are considered elementary particles in that they aren't made up of smaller units of matter. Quarks -- groups ofsubatomic particlesthat interact by means of astrong force-- combine into protons and neutro...
One reason why there are so many different technologies for materials characterization is the reality that most technologies have a very narrow application. They may only work on nanomaterials or on thin samples, or they might only measure electromagnetic fields in a certain frequency range. This me...
Currently, the most effective treatment for advanced PD is the electrical DBS with electrodes implanted in the subthalamic nucleus or internal globus pallidus, and with frequency of the electrical current in the range of 120–130 Hz, delivered continuously. It is not fully understood what makes thi...
Based on the inherent characteristics of MN, they are long enough to penetrate the SC and short enough to avoid significant damage to the dermis, dermal microcirculation and nerve endings, making application painless and blood-free. Several MN systems have been developed for the local, intradermal...
be taken when walking on older ballasted EPDM roofing systems, as the ballast stone tends to crack and split over time due to thermal cycling. There are usually a large number of jagged stones all over a ballasted roof that you want to avoid stepping on with too much force. Tread lightly...
standing in the center of a complicated maze. To escape the maze, a traditional computer would have to “brute force” the problem, trying every possible combination of paths to find the exit. This kind of computer would use bits to explore new paths and remember which ones are dead ends....
surface area, silica fumes promote adhesion through nano-sized primary particles, and attapulgite is an exceptionally effective gellant. Polymeric modifiers like acrylate polymers and polyamide wax exhibit stable viscosity over a wide pH range and are applicable in most solvent-based synthetic resin ...