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  • Methods
  • Practical and comprehensive, Cell Cycle Synchronization: Methods and Protocols, Second Edition is a valuable resource for PhD students and postdoctoral fellows, and researchers interested in general science, pharmacy, medicine and public health, computer science, and life sciences. (springer.com)
  • The purpose of the study is to examine the effects of two contraceptive methods and the menstrual cycle on the pharmacokinetics, pharmacodynamics of tenofovir 1% gel and the effect of the contraceptive methods on markers of mucosal safety. (clinicaltrials.gov)
  • pathway
  • The metabolic pathway map example "Citric acid cycle (TCA cycle)" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Biology solution from the Science and Education area of ConceptDraw Solution Park. (conceptdraw.com)
  • The vector stencils library "Citric acid cycle (TCA cycle)" contains 26 symbols of metabolites for drawing metabolic pathway maps and biochemical shematic diagrams of the citric acid cycle (TCA cycle, tricarboxylic acid cycle, Krebs cycle) and diagrams of metabolism processes. (conceptdraw.com)
  • The name of this metabolic pathway is derived from citric acid (a type of tricarboxylic acid) that is consumed and then regenerated by this sequence of reactions to complete the cycle. (conceptdraw.com)
  • cell cycle
  • This second edition volume provides detailed protocols on the theoretical background of cell cycle synchronization procedures and instructions on how to implement these techniques. (springer.com)
  • and cell cycle control. (springer.com)
  • The stress-regulated mitogen activated protein kinase: MAPK) p38 also phosphorylates Rb, but it does so in a cell cycle-independent manner that is associated with apoptosis rather than with cell division. (wustl.edu)
  • p38 bypasses the cell cycle-associated hierarchical phosphorylation and directly phosphorylates Rb on Ser567, which is not phosphorylated during the normal cell cycle. (wustl.edu)
  • women
  • Not all women with abnormal menstrual cycle are infertile, but if you are diagnosed with the unexplained cause of infertility, then your abnormal menstrual cycle may be the cause. (blogspot.ca)
  • In sum, the menstrual cycle phase has relatively modest effects on ventilation, but no effect on V̇ O 2 max of HA native women. (biologists.org)
  • Among women who were premenarcheal at the time of the explosion, a 10-fold increase in serum TCDD level was associated with a lengthening of the menstrual cycle by 0.93 days (95% confidence interval (CI): -0.01, 1.86) and a reduction in the odds of scanty menstrual flow (adjusted odds ratio = 0.33, 95% CI: 0.10, 1.06). (oup.com)
  • However, among women who were postmenarcheal at the time of the explosion, TCDD was not associated with menstrual cycle length (adjusted β = -0.03 days, 95% CI: -0.61, 0.54) or scantiness of flow (adjusted odds ratio = 1.36, 95% CI: 0.70, 2.64). (oup.com)
  • levels
  • In both menarche groups, TCDD levels were associated with decreased odds of having irregular cycles (adjusted odds ratio = 0.46, 95% CI: 0.23, 0.95) but were not related to days of flow (adjusted β = 0.16 days, 95% CI: -0.08, 0.41). (oup.com)
  • Thermodynamic
  • This article is about the thermodynamic cycle. (wikipedia.org)
  • However, optimistic expectations based on initial thermodynamics studies were quickly moderated by pragmatic analyses comparing standard technologies (thermodynamic cycles for electricity generation, coupled with the electrolysis of water) and by numerous practical issues (insufficient temperatures from even nuclear reactors, slow reactivities, reactor corrosion, significant losses of intermediate compounds with time. (wikipedia.org)
  • harmonic
  • One way to generate fairly accurate square wave signals with 1/ n duty factor, where n is an integer, is to vary the duty cycle until the n th- harmonic is significantly suppressed. (wikipedia.org)
  • Harmonic cycles-repeated sequences of a harmonic progression-are at the root of many musical genres, such as the twelve-bar blues. (wikipedia.org)
  • In the same way as specific harmonic cycles determine the genre of many Western pieces (like the blues), gamelan pieces are classified according to their colotomic structures. (wikipedia.org)
  • These interval cycles play a fundamental role in the harmonic organization of post-diatonic music and can easily be identified by naming the cycle. (wikipedia.org)
  • Cyclic
  • Look up cycle , cyclic , or cyclical in Wiktionary, the free dictionary. (wikipedia.org)
  • Aus den sieben Tagen Circle of fifths Cyclic form Für kommende Zeiten Klang Symphonic cycle Zyklus Randel, Don, "Cycle", The Harvard Dictionary of Music, Cambridge, MA: Belknap Press, 1986, p. 218. (wikipedia.org)
  • geological
  • The migration of heated and compressed chemical elements and compounds such as silicon, aluminium, and general alkali metals through the means of subduction and volcanism is known in the geological world as geochemical cycles. (wikipedia.org)
  • The second view (Protopangea-Paleopangea), based on both palaeomagnetic and geological evidence, is that supercontinent cycles did not occur before about 0.6 Ga (during the Ediacaran Period). (wikipedia.org)
  • Krebs
  • When the supply of oxygen is sufficient, this energy comes from feeding pyruvate , one product of glycolysis, into the Krebs cycle . (wikipedia.org)
  • This allows the oxygen debt to be repaid such that the Krebs cycle and electron transport chain can produce energy at peak efficiency. (wikipedia.org)
  • 2016
  • Sleep Cycle is the debut solo album by Animal Collective member Deakin (Josh Dibb), released on Bandcamp on April 6, 2016. (wikipedia.org)
  • As of 2016, Cycle Pure Agarbathies held a 15% share in the incense industry in India, estimated to be worth Rs. (wikipedia.org)
  • Earth's
  • Herein, we quantitatively explore one aspect of the evolutionary coupling between animal life and Earth's oxygen cycle-the influence of spatial and temporal variability in surface ocean O 2 levels on the ecology of early metazoan organisms. (pnas.org)
  • The supercontinent cycle is the quasi-periodic aggregation and dispersal of Earth's continental crust. (wikipedia.org)
  • occur
  • Parasitic life cycles occur in a variety of forms, all involving the exploitation of one or more hosts . (wikipedia.org)
  • Changes may not be apparent over a short term, such as with biogeochemical cycles, but over a long term changes of great magnitude occur, including the evolution of continents and oceans. (wikipedia.org)
  • refers
  • In the printer / copier industry, the duty cycle specification refers to the rated throughput (that is, printed pages) of a device per month. (wikipedia.org)
  • In neural circuits for example, a duty cycle specifically refers to the proportion of a cycle period in which a neuron remains active. (wikipedia.org)
  • The Cori cycle (also known as the Lactic acid cycle), named after its discoverers, Carl Ferdinand Cori and Gerty Cori , refers to the metabolic pathway in which lactate produced by anaerobic glycolysis in the muscles moves to the liver and is converted to glucose, which then returns to the muscles and is metabolized back to lactate. (wikipedia.org)
  • displaystyle
  • The corresponding statement holds for a trajectory in the interior that approaches the limit cycle for time approaching − ∞ {\displaystyle -\infty } , and also for trajectories in the exterior approaching the limit cycle. (wikipedia.org)
  • It is unknown, for instance, whether there is any system x ′ = V ( x ) {\displaystyle x'=V(x)} in the plane where both components of V {\displaystyle V} are quadratic polynomials of the two variables, such that the system has more than 4 limit cycles. (wikipedia.org)
  • As a formula, a duty cycle (%) may be expressed as: D = P W T × 100 % {\displaystyle D={\frac {PW}{T}}\times 100\%} Equally, a duty cycle (ratio) may be expressed as: D = P W T {\displaystyle D={\frac {PW}{T}}} where D {\displaystyle D} is the duty cycle, P W {\displaystyle PW} is the pulse width (pulse active time), and T {\displaystyle T} is the total period of the signal. (wikipedia.org)
  • processes
  • The geochemical cycle encompasses the natural separation and concentration of elements and heat-assisted recombination processes. (wikipedia.org)
  • The term cycle is used because aside of water, hydrogen and oxygen, the chemical compounds used in these processes are continuously recycled. (wikipedia.org)
  • A rebirth in the year 2000 can be explained by both the new energy crisis, demand for electricity, and the rapid pace of development of concentrated solar power technologies whose potentially very high temperatures are ideal for thermochemical processes, while the environmentally friendly side of thermochemical cycles attracted funding in a period concerned with a potential peak oil outcome. (wikipedia.org)
  • Mathematics
  • In mathematics, in the study of dynamical systems with two-dimensional phase space, a limit cycle is a closed trajectory in phase space having the property that at least one other trajectory spirals into it either as time approaches infinity or as time approaches negative infinity. (wikipedia.org)
  • Existence
  • The Bendixson-Dulac theorem and the Poincaré-Bendixson theorem predict the absence or existence, respectively, of limit cycles of two-dimensional nonlinear dynamical systems. (wikipedia.org)
  • The existence of procyclical leverage amplifies the effect on asset prices over the business cycle. (wikipedia.org)
  • molecules
  • Overall, the glycolysis part of the cycle produces 2 ATP molecules at a cost of 6 ATP molecules consumed in the gluconeogenesis part. (wikipedia.org)
  • Each iteration of the cycle must be maintained by a net consumption of 4 ATP molecules. (wikipedia.org)
  • sequences
  • It has been found that some non-consecutive steps of the cycle can be catalyzed by minerals through photochemistry , while entire two three-step sequences can be promoted by metal ions and iron (as reducing agent ) under acidic conditions. (wikipedia.org)
  • movements
  • Individual pieces that aggregate into larger works are considered cycles, for example, the movements of a suite, symphony, sonata, or string quartet. (wikipedia.org)
  • compositions
  • Most compositions using this technique end when the two cycles coincide. (wikipedia.org)
  • Vox Cycle is a six compositions or independent movement cycle for four amplified voices, and electroacoustic music by Trevor Wishart, composed between 1980 and 1988, associated with extended vocal techniques and the contemporary vocal composition. (wikipedia.org)
  • voices
  • One example is isorhythm, the medieval practice of using melodic and rhythmic cycles in one or two voices. (wikipedia.org)
  • atmosphere
  • Like the author's other major series, The Chronicles of Thomas Covenant, the Unbeliever, The Gap Cycle is characterised by a dark and bleak atmosphere. (wikipedia.org)
  • Approximately
  • Approximately mid-cycle, 24-36 hours after the luteinizing hormone (LH) surges, the dominant follicle releases an ovocyte , in an event called ovulation. (wikipedia.org)
  • complex
  • The drug metformin can cause lactic acidosis in patients with renal failure because metformin inhibits the hepatic gluconeogenesis of the Cori cycle, particularly the mitochondrial respiratory chain complex 1. (wikipedia.org)
  • Those that must infect more than one host species to complete their life cycles are said to have complex or indirect life cycles, while those that infect a single species have direct life cycles. (wikipedia.org)
  • It is now known that there is a more complex cycling of amino acids between Rhizobia bacteroids and plants. (wikipedia.org)
  • complete
  • A period is the time it takes for a signal to complete an on-and-off cycle . (wikipedia.org)
  • sometimes, infection is facultative -the parasite can survive and complete its life cycle without infecting that particular host species. (wikipedia.org)
  • Cycle also applies to the complete performance of an individual composer's work in one genre. (wikipedia.org)
  • One complete supercontinent cycle is said to take 300 to 500 million years. (wikipedia.org)
  • period
  • A duty cycle or power cycle is the fraction of one period in which a signal or system is active. (wikipedia.org)
  • The "on time" for a 60% duty cycle could be a fraction of a second, a day, or even a week, depending on the length of the period. (wikipedia.org)
  • In electronics, duty cycle is the percentage of the ratio of pulse duration, or pulse width (PW) to the total period (T) of the waveform. (wikipedia.org)
  • For example, a signal (10101010) has 50% duty cycle, because the pulse remains high for 1/2 of the period or low for 1/2 of the period. (wikipedia.org)
  • Similarly, for pulse (10001000) the duty cycle will be 25% because the pulse remains high only for 1/4 of the period and remains low for 3/4 of the period. (wikipedia.org)
  • In a welding power supply , the maximum duty cycle is defined as the percentage of time in a 10-minute period that it can be operated continuously before overheating. (wikipedia.org)
  • This is an idealized mathematical model: real physical diesels do have an increase in pressure during this period, but it is less pronounced than in the Otto cycle. (wikipedia.org)
  • The cessation of menstrual cycles at the end of a woman's reproductive period is termed menopause . (wikipedia.org)
  • minerals
  • The kinds of minerals found inside ancient diamonds suggest that the cycle of supercontinental formation and breakup began roughly 3.0 billion years ago. (wikipedia.org)
  • time
  • Duty cycles can be used to describe the percent time of an active signal in an electrical device such as the power switch in a switching power supply or the firing of action potentials by a living system such as a neuron . (wikipedia.org)
  • For example, if a motor runs for one out of 100 seconds, or 1/100 of the time, then, its duty cycle is 1/100, or 1 percent. (wikipedia.org)
  • Today the sport is managed and administered by British Cycling, the governing body for all cycle sport in the UK except individual and team time trials. (wikipedia.org)
  • In the case where all the neighbouring trajectories approach the limit cycle as time approaches infinity, it is called a stable or attractive limit cycle (ω-limit cycle). (wikipedia.org)
  • If instead all neighbouring trajectories approach it as time approaches negative infinity, then it is an unstable limit cycle (α-limit cycle). (wikipedia.org)
  • If there is a neighbouring trajectory which spirals into the limit cycle as time approaches infinity, and another one which spirals into it as time approaches negative infinity, then it is a semi-stable limit cycle. (wikipedia.org)
  • The Cycle is focused on the relationship and the interpolation between natural sounds and human voice, the main musical interest of the composer on which he has been researching for a long time, starting from Red Bird composition released through analog means. (wikipedia.org)
  • collection
  • The Tyrfing Cycle is a collection of Norse legends, unified by the shared element of the magic sword Tyrfing. (wikipedia.org)
  • In other words, a collection of pitches by starting with a certain note and going up by a certain interval until the original note is reached (e.g. starting from C, going up by 3 semitones repeatedly until eventually C is again reached - the cycle is the collection of all the notes met on the way). (wikipedia.org)
  • include
  • The ACASI files include most of the items from the ACASI portion of the NSFG Cycle 6 interview (female section J and male section K). The series on income and sources of income were collected in ACASI, but they are included on the Cycle 6 Public Use Files. (cdc.gov)
  • temperatures
  • As the gas passes more cycles and becomes cooler, reaching lower temperatures at the expanding cylinder (stage 4 of the Siemens cycle) becomes more difficult. (wikipedia.org)
  • system
  • They imply self-sustained oscillations: the closed trajectory describes perfect periodic behavior of the system, and any small perturbation from this closed trajectory causes the system to return to it, making the system stick to the limit cycle. (wikipedia.org)
  • music
  • In electronic music, music synthesizers vary the duty cycle of their audio-frequency oscillators to obtain a subtle effect on the tone colors . (wikipedia.org)
  • Cycle has several meanings in the field of music. (wikipedia.org)
  • In the gamelan music of Indonesia, there are nested gong cycles which determine the rhythmic framework of the piece. (wikipedia.org)
  • A similar process is used in serial music, although the number of different overlapping cycles can be quite large, and encode a wide variety of musical parameters, such as dynamics, articulation, timbre, register, and so forth. (wikipedia.org)
  • 60 Cycle developed a style of power pop/punk music and was known for its unique melodic song craft and tight live performances. (wikipedia.org)
  • chemical
  • In Earth science, a geochemical cycle is the pathway that chemical elements take in the surface and crust of the Earth. (wikipedia.org)
  • spark
  • This is in contrast to igniting the fuel-air mixture with a spark plug as in the Otto cycle (four-stroke/petrol) engine. (wikipedia.org)
  • Information flow in this model can be thought of as a cycle because, conceptually, the published information might spark new ideas which will pass through similar stages. (wikipedia.org)
  • second
  • The number of limit cycles of a polynomial differential equation in the plane is the main object of the second part of Hilbert's sixteenth problem. (wikipedia.org)