For reactions involving oxygen, the gain of oxygen implies the oxidation of the atom or molecule to which the oxygen is added (and the oxygen is reduced). In organic compounds, such as butane or ethanol, the loss of hydrogen implies oxidation of the molecule from which it is lost (and the hydrogen is reduced).
In Ethiopian Orthodoxy, fasting (tsome) lasts for 55 continuous days before Easter (Fasika), although the fast is divided into three separate periods: Tsome Hirkal, eight days commemorating an early Christian figure; Tsome Arba, forty days of Lent; and Tsome Himamat, seven days commemorating Holy Week.
Lent is the span of time in the church calendar that starts with Ash Wednesday and ends with Easter Sunday. Ash Wednesday commemorates the beginning of Jesusâ 40-day fasting and temptation in the desert, and Easter Sunday commemorates Jesusâ resurrection from the grave after his crucifixion. Lent, then, is generally observed as a time for Christians to reflect, repent, and pray as a way of preparing their hearts for Easter.