Unleavened bread Unleavened bread Unleavened bread is any of a wide variety of breads which are not prepared with raising agents such as yeast. Unleavened breads are generally flat breads; however, not all flat breads are unleavened. Unleavened breads, such as the tortilla and roti, are staple foods in Central America and South Asia, respectively. Unleavened breads have symbolic importance in Judaism and Christianity. Jews consume unleavened breads such as matzo during Passover - various traditions explain this usage. Unleavened bread also features in some Western Christian liturgies during the Eucharist, a rite derived from the Last Supper when Jesus broke bread,
H-IIB total length of the first stage is extended by 1m from that of H-IIA. As a result, the H-IIB first stage holds 70% more propellant than that of the H-IIA. The second stage is powered by a single LE-5B engine. The first launch of the H-IIB occurred on 10 September 2009 at 1701 UTC. It successfully launched the HTV-1, which was on a mission to resupply the International Space Station (ISS). H-IIB H-IIB (H2B) is an expendable launch system used to launch H-II Transfer Vehicles (HTV, or "Kounotori") towards the International Space Station. H-IIB rockets are liquid-fuelled with solid-fuel strap-on