Abstract We derive the 3D N = 1 superpotential for closed string sector of type IIB supergravity on toroidal O5 orientifolds with co-calibrated G2 structure and RR background flux. find that such compactifications can provide full moduli stabilization supersymmetric $$\hbox {AdS}_3$$ AdS 3</mml:m...

Straipsnyje apžvelgiami Baltijos jūros uostai, jų krovos mastai nuo 2006 iki 2012 metų. Aptariama importo ir eksporto per uostus struktūra, krovinių sudėtis kaitos tendencijos. Lyginami Rytų uostai (Primorsko, Ust Lugos, Sankt Peterburgo, Kaliningrado, Talino, Ventspilio, Rygos, Liepojos, Būtingės, Klaipėdos), kurie tarpusavyje konkuruoja nuolat tobulindami technologijas, infrastruktūrą, siekda...

Suitably configured allyl ethers of unsaturated cyclitols act as substrates β-glycosidases, reacting via allylic cation transition states. Incorporation halogens at the vinylic position these carbasugars, along with an activated leaving group, generates potent inactivators β-glycosidases. Enzymatic turnover halogenated (F, Cl, Br) displayed a counter-intuitive trend wherein most electronegative...