It is also known as anaphylactic shock. Signs of anaphylaxis include: 1  itchy skin or a raised, red skin rash. 2  swollen eyes, lips, hands and feet. 3  feeling lightheaded or faint. 4  swelling of the mouth, throat or tongue, which can cause breathing and swallowing difficulties.  wheezing.
Shell Helix synthetic technology oils make use of both synthetic and mineral base stocks to achieve higher performance levels than can be formulated from mineral oils alone. Semi synthetic motor oils help protect your engine. Shell Helix semi-synthetic or âsynthetic technologyâ oils make use of both synthetic and mineral base stocks to achieve higher performance levels than can be formulated from mineral oils alone.
A helix (pl: helixes or helices) is a type of smooth space curve, i.e. a curve in three-dimensional space. It has the property that the tangent line at any point makes a constant angle with a fixed line called the axis.Examples of helices are coil springs and the handrails of spiral staircases. double helix consists of two (typically congruent) helices with the same axis, differing by a translation along the axis. A conic helix may be defined as a spiral on a conic surface, with the distance to the apex an exponential function of the angle indicating direction from the axis.