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=== Some of our finest <font size=1>[ [[CZ:Approval Process|about]] ] </font> ===
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[[:Category:Citable versions of articles|Citable]] <font size=1>('''{{PAGESINCAT:Citable versions of articles}}''')</font><br />
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|<div style="background-color:lightyellow; color:darkblue; font-size:90%"><center>'''Share your knowledge. It's a way to achieve immortality.'''</center><br><center>&mdash;'''Often attributed to the Dalai Lama'''</center></div>
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<big>[[CZ:Featured article|Featured Article]]: ''[[{{FeaturedArticleTitle}}]]''</big>  
=== Article of the Week <font size=1>[ [[CZ:Article of the Week|about]] ]</font> ===
</h3>
[[Image:Biological_information_flow.gif|thumb|200px|In living cells, genes are expressed via a messenger RNA (mRNA) which participates in the synthesis of [[protein]]s. In turn, the catalytic activities of proteins decide many of the properties of a cell, that is, its outward [[phenotype]].]]
{{CZ:Featured article/Current}}
'''[[RNA interference]] (RNAi)''' is a process that inhibits the flow of genetic information to protein synthesis, which normally proceeds from deoxyribonucleic acid ([[DNA]]) to messenger ribonucleic acid ([[mRNA]]) to proteins - a process known as [[gene expression]] (see figure, top right). mRNA, a single-stranded [[polymer]], is the key molecule whose sequence of [[nucleotide]]s transports the information encoded in DNA to regions of the cell where that DNA-genetic information is used for synthesizing [[protein]]s. Understanding that flow of information is necessary for understanding the RNAi mediated feedback loops that inhibit gene expression.
 
Specifically, RNAi is a mechanism in [[eukaryotic cells]] that is triggered when such cells are exposed to certain double-stranded ribonucleic acid (dsRNA) molecules. The  process has been detected in many organisms, including animal, plant and protist cells. The distinguishing characteristic of RNAi is destruction of mRNA molecules that share at least some of the sequence characteristics of dsRNA trigger molecules to which the cells have been exposed. RNAi has important biological roles in gene regulation and in protection of organisms against genetic parasites such as [[Virus (biology)|viruses]] and [[Transposon|transposons]].
<font size=1>[[RNA interference|['''more...''']]]</font>
 
=== New Draft of the Week <font size=1>[ [[CZ:New Draft of the Week|about]] ]</font> ===
'''[[Palatalization]]''' denotes several processes of ''[[assimilation (linguistics)|assimilation]]'' in [[phonetics]] and [[phonology]], by which the articulation of a [[consonant]] is changed under the influence of a preceding or following front [[vowel]] or a palatal or palatalized consonant. This is especially likely to occur with the palatal approximant [j]. As a general term, palatalization can cover various different phonetic and [[phonology|phonological]] processes such as ''phonological palatalization'', ''phonetic palatalization'', ''[[assibilation]]'', and ''[[coronalization]]''. The term 'palatalization' is sometimes used by European [[linguistics|linguists]] ([[German language|German]] ''Palatalisierung'') to refer to a type of vowel mutation more commonly referred to as ''[[i-umlaut]]'' (UK: ''i-mutation''). The [[French language|French]] term ''mouillure'' (German ''Mouillierung'') is another word for (phonemic) palatalization. 
<font size=1>[[Palatalization|['''more...''']]]</font>
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<div style='text-align: right;'><small>''[[{{FeaturedArticleTitle}}|Continued]]...''</small></div>

Latest revision as of 08:47, 31 October 2024

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Why is Citizendium deleting articles?


Help Write Articles about our World

Welcome to Citizendium, a wiki for providing free knowledge where authors use their real names. We regard information as a public good and welcome anyone who wants to share their knowledge on virtually any subject. Our online community prides itself on being congenial and supportive.

Citizendium Getting Started
Quick Start | About us | Help system | Start a new article | For Wikipedians  


See Recent Changes—an overview of articles being worked on now.

Become a member--it's free!

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Article counts

Citable (146)
Developed (1,128)
Developing (7,392)
Stubs (7,672)
(16,468 total)

If you have knowledge, let others light their candles in it.
— Margaret Fuller (1810–1850)
       —add a quotation about knowledge or writing


Featured Article: Poverty

The Mathare Valley slum near Nairobi, Kenya, in 2009.

Poverty is deprivation based on lack of material resources. The concept is value-based and political. Hence its definition, causes and remedies (and the possibility of remedies) are highly contentious.[1] The word poverty may also be used figuratively to indicate a lack, instead of material goods or money, of any kind of quality, as in a poverty of imagination.

Definitions

Primary and secondary poverty

The use of the terms primary and secondary poverty dates back to Seebohm Rowntree, who conducted the second British survey to calculate the extent of poverty. This was carried out in York and was published in 1899. He defined primary poverty as having insufficient income to “obtain the minimum necessaries for the maintenance of merely physical efficiency”. In secondary poverty, the income “would be sufficient for the maintenance of merely physical efficiency were it not that some portion of it is absorbed by some other expenditure.” Even with these rigorous criteria he found that 9.9% of the population was in primary poverty and a further 17.9% in secondary.[2]

Absolute and comparative poverty

More recent definitions tend to use the terms absolute and comparative poverty. Absolute is in line with Rowntree's primary poverty, but comparative poverty is usually expressed in terms of ability to play a part in the society in which a person lives. Comparative poverty will thus vary from one country to another.[3] The difficulty of definition is illustrated by the fact that a recession can actually reduce "poverty".

Causes of poverty

The causes of poverty most often considered are:

  • Character defects
  • An established “culture of poverty”, with low expectations handed down from one generation to another
  • Unemployment
  • Irregular employment, and/or low pay
  • Position in the life cycle (see below) and household size
  • Disability
  • Structural inequality, both within countries and between countries. (R H Tawney: “What thoughtful rich people call the problem of poverty, thoughtful poor people call with equal justice a problem of riches”)[4]

As noted above, most of these, or the extent to which they can be, or should be changed, are matters of heated controversy.

Footnotes

  1. Alcock, P. Understanding poverty. Macmillan. 1997. ch 1.
  2. Harris, B. The origins of the British welfare state. Palgrave Macmillan. 2004. Also, Oxford Dictionary of National Biography.
  3. Alcock, Pt II
  4. Alcock, Preface to 1st edition and pt III.