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.
The alpha helix (Î±-helix) is a common secondary structure of proteins and is a righthand-coiled or spiral conformation (helix) in which every backbone N-H group donates a hydrogen bond to the backbone C=O group of the amino acid four residues earlier (hydrogen bonding).he amino acids in an Î± helix are arranged in a right-handed helical structure where each amino acid residue corresponds to a 100Â° turn in the helix (i.e., the helix has 3.6 residues per turn), and a translation of 1.5 A (Ã¥.0 15) nm along the helical. axis