PeptidePeptides are short chains of amino acids linked by peptide bonds. A polypeptide is a longer, continuous, unbranched peptide chain. Polypeptides which have a molecular mass of 10,000 Da or more are called proteins. Chains of fewer than twenty amino acids are called oligopeptides, and include dipeptides, tripeptides, and tetrapeptides. Peptides fall under the broad chemical classes of biological polymers and oligomers, alongside nucleic acids, oligosaccharides, polysaccharides, and others.
X-rayX-ray radiation, or, much less commonly, X-radiation, is a penetrating form of high-energy electromagnetic radiation. Most X-rays have a wavelength ranging from 10 nanometers to 10 picometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3e16Hz to 3e19Hz) and energies in the range 124 keV to 145 eV, respectively. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays.
Free will in theologyFree will in theology is an important part of the debate on free will in general. Religions vary greatly in their response to the standard argument against free will and thus might appeal to any number of responses to the paradox of free will, the claim that omniscience and free will are incompatible. Argument from free will The theological doctrine of divine foreknowledge is often alleged to be in conflict with free will, particularly in Calvinistic circles: if God knows exactly what will happen (right down to every choice a person makes), it would seem that the "freedom" of these choices is called into question.
ReformismReformism is a political doctrine advocating the reform of an existing system or institution instead of its abolition and replacement via revolution. Within the socialist movement, reformism is the view that gradual changes through existing institutions can eventually lead to fundamental changes in a society's political and economic systems. Reformism as a political tendency and hypothesis of social change grew out of opposition to revolutionary socialism, which contends that revolutionary upheaval is a necessary precondition for the structural changes necessary to transform a capitalist system to a qualitatively different socialist system.
CalvinismCalvinism, also sometimes called the Reformed tradition, Reformed Protestantism, Reformed Christianity, or simply Reformed, is a major branch of Protestantism that follows the Christian theological tradition and forms of Christian practice set down by John Calvin and other Reformation-era theologians. It emphasizes the sovereignty of God and the authority of the Bible. Calvinists broke from the Roman Catholic Church in the 16th century.
