transition cells - definition. What is transition cells
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%ما هو (من)٪ 1 - تعريف

TERM IN GENETICS
Transition (Genetics); Transition mutation; Nucleotide transition; Base transition

Epidemiological transition         
  • Leading causes of DALYs and percentage change between 1990 and 2013, Chile
  • Demographic change in Germany, Sweden, Chile, Mauritius, China from 1820 to 2010.<br />Pink line: crude [[death rate]] (CDR), green line: (crude) [[birth rate]] (CBR), yellow line: population.
  • Leading causes of DALYs and percentage change between 1990 and 2013, France
  • 25 most common GBD level 3 causes of global DALYs for both sexes combined, 1990, 2005, and 2013, with age-standardised median percentage change. Ranks are based on the number of DALYs. 95% UIs for mean rank are from 1000 draws of DALYs. Communicable, maternal, neonatal, and nutritional disorders causes are shown in red, non-communicable causes in blue, and injuries in green. DALY=disability-adjusted life-years. GBD=Global Burden of Disease. UI=uncertainty interval. COPD=chronic obstructive pulmonary disease.
  • Population pyramids of developed and developing nations, showing how increased lifespan and changes in fertility alter the population. Each bar represents an age category and its percent of the total population, with males to the left and females to the right.
  • Leading causes of DALYs and percentage change between 1990 and 2013, Zimbabwe
TERM IN DEMOGRAPHY AND MEDICAL GEOGRAPHY OF DEVELOPING COUNTRIES IN PARTICULAR, RELATING TO AN OLDER POPULATION
Epidemiologic Transition; Epidemiological Transition; Epidemiologic transition
In demography and medical geography, epidemiological transition is a theory which "describes changing population patterns in terms of fertility, life expectancy, mortality, and leading causes of death." For example, a phase of development marked by a sudden increase in population growth rates brought by improved food security and innovations in public health and medicine, can be followed by a re-leveling of population growth due to subsequent declines in fertility rates.
transition metal         
  • Oxidation states of the transition metals. The solid dots show common oxidation states, and the hollow dots show possible but unlikely states.
SERIES OF CHEMICAL ELEMENTS
Transition element; Transition metals; Transition elements; Transition Metals; Transition Metal; Transition Element; Metal Oxidation States; Metal oxidation states; First-row transition metal; Transitional metal; First transition series; Transitional metals; Transition metal catalyst; D-block element; Transition-metal catalyst; Transition-metal
(also transition element)
¦ noun Chemistry any of the set of metallic elements occupying a central block in the periodic table, e.g. iron, manganese, chromium, and copper.
Kosterlitz–Thouless transition         
PHASE TRANSITION IN THE TWO-DIMENSIONAL (2-D) XY MODEL
Berezinsky-Kosterlitz-Thouless transition; Kosterlitz-Thouless transition; Kosterlitz-Thouless; Berezinsky–Kosterlitz–Thouless transition; BKT transition; KT transition; Berezinskii-Kosterlitz-Thouless transition; Kosterlitz–Thouless transition
The Berezinskii–Kosterlitz–Thouless transition (BKT transition) is a phase transition of the two-dimensional (2-D) XY model in statistical physics. It is a transition from bound vortex-antivortex pairs at low temperatures to unpaired vortices and anti-vortices at some critical temperature.

ويكيبيديا

Transition (genetics)

Transition, in genetics and molecular biology, refers to a point mutation that changes a purine nucleotide to another purine (A ↔ G), or a pyrimidine nucleotide to another pyrimidine (C ↔ T). Approximately two out of three single nucleotide polymorphisms (SNPs) are transitions.

Transitions can be caused by oxidative deamination and tautomerization. Although there are twice as many possible transversions, transitions appear more often in genomes, possibly due to the molecular mechanisms that generate them.

5-Methylcytosine is more prone to transition than unmethylated cytosine, due to spontaneous deamination. This mechanism is important because it dictates the rarity of CpG islands.