How To Use Tropism In A Sentence
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But atavistic, or vestigial, geotropism in Genesistrine -- or a million larvae start crawling, and a million little frogs start hopping -- knowing no more what it's all about than we do when we crawl to work in the morning and hop away at night.
The Book of the Damned
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Joining forces: The interface of gravitropism and plastid protein import.
SpaceRef Top Stories
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The main stems of a plant show negative geotropism as they grow upwards.
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It has a wide cell tropism and remains extra-chromosomal, therefore minimising the risk of insertional mutagenesis.
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Such a turning in response to a stimulus is called a tropism (troh'pizm; "turning" G).
The Human Brain
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Where the specific stimulus is light, the phenomenon is phototropism ( "light-turning" G).
The Human Brain
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AIM : To compare the kinetics of positive inotropism between ibopamine ( Ibo ) and ouabain ( Oua ).
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Thus it was that the interpretations of J. Loeb (Die Tropismen, 1913) on the basis of experiments done with lower animals, estab - lished the neologist ideas of “phototropism” (orien - tation or displacement reaction in the direction of light), and of “thermotropism” (reaction directed to - wards a source of heat), to explain animal and perhaps also human behavior.
Dictionary of the History of Ideas
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Such seedlings behaved identically to seedlings grown on uncovered filter paper and, hence, any possible effects of hydrotropism were eliminated.
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His very geographical situation was sufficient to turn the mind towards him, but the particular reason for that heliotropism on the part of his feminine neighbors was that he was an easy man for a woman to ask.
The Wrong Woman
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This 'tropism' has been classically exhibited in the events surrounding the recent and intensely upsetting Flotilla incidents.
Qanta Ahmed, MD: Israel and the Flotilla: On the Dangers of a Binary View
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They give the quintessence of laboratory experiments as to what are the effects of different energies such as light (heliotropism), electricity (galvanotropism), gravity (geotropism), etc., in their reaction and influence upon the movements and actions of living organisms.
Manhood of Humanity.
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This paper focuses on the recent advances in four of the best-understood tropic responses and how each affects plant growth and development: phototropism, gravitropism, thigmotropism and hydrotropism.
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Aboody and her colleagues were the first to demonstrate in 2000 the inherent propensity of neural stem cells to home in on invasive tumor cells, also known as tropism, even migrating from the opposite side of the brain or across the blood-brain barrier.
PhysOrg.com - latest science and technology news stories
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In an ingenious and thought-provoking paper some time ago, Jerrold Levinson put forward a novel and imaginative thesis purporting to explain why tropism never quite got off the ground, despite its respectable bimillennial launch history (1980).
Tropes
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It was shown that gaseous ethylene inhibits both growth and geotropism in plants, and ethylene is endogenously produced by fruits.
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The nucleus-localized, flavin-binding gene products, CRY1 and CRY2 are involved in several blue light responses, including phototropism.
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The gene exhibited pleiotropism by influencing not only oleate and linoleate, but also levels of palmitate, gadoleate, and total saturated fatty acids.
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All legume plants do this, so be sure to watch your peas and beans for signs of heliotropism.
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Loeb states, on the authority of Eigenmann, that all those forms which live in caves were adapted to life in the dark before they entered the cave, because they are all negatively heliotropic and positively stereotropic, and with these tropisms would be forced to enter a cave whenever they were put at the entrance.
Hormones and Heredity
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One of the most common examples of thigmotropism is seen in tendrils, which wrap around any object with which they come in contact.
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This kind of chemotropism is called ‘chemorepulsion’.
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I don’t see how tropism is connected to suffering. allqsallthetime Says:
“But it’s not like I, ya know, eat them.”
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Loeb states, on the authority of Eigenmann, that all those forms which live in caves were adapted to life in the dark before they entered the cave, because they are all negatively heliotropic and positively stereotropic, and with these tropisms would be forced to enter a cave whenever they were put at the entrance.
Hormones and Heredity
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I tiptoed religiously by it, went on up to the big house where the three women slept, as if drawn to their abode by a sort of heliotropism.
Tramping on Life
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This experiment actually looks at chemotropism for potassium, which is a macronutrient, so you will need to dilute your copper sulfate solution at 1 ml into 1 liter before you begin your watering.
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Thus, a model for gravitropism in stem-like organs is proposed in which F-actin modulates the gravity response by actively participating in statolith repositioning within the endodermal statocytes.
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Other arguments are drawn from chemistry, especially from the facts of isomerism, polymerism, and allotropism.
The Catholic Encyclopedia, Volume 4: Clandestinity-Diocesan Chancery
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So, too, some of the alterations met with appear susceptible of no other explanations than that they are reversions to some pre-existing form, or, at any rate, that they are manifestations of a phase of the plant affected different from that which is habitual, and due, as it were, to a sort of allotropism.
Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants
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Make sure you look at the movies for morning glories twining, and corn seedling phototropism.
Rambles at starchamber.com » Blog Archive » Green machines
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It appears to be a case of thermotropism, where the flower buds sense the cold downdraft of a thunderstorm and constrict before the drowning rain arrives.
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Once plant life invaded the land it was subject to the action of gravity, and geotropism ( "earth-turning" G), involving an automatic and adaptive response to gravity, was developed.
The Human Brain
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It is impossible to understand in this case, firstly, how a mutation could cause the eyes to be divided and doubly adapted to two different optic conditions, and, secondly, how at the same time a convenient 'tropism' should occur which caused the animal to swim with its eyes half in and half out of water.
Hormones and Heredity
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Thus it was that the interpretations of J. Loeb (Die Tropismen, 1913) on the basis of experiments done with lower animals, estab - lished the neologist ideas of “phototropism” (orien - tation or displacement reaction in the direction of light), and of “thermotropism” (reaction directed to - wards a source of heat), to explain animal and perhaps also human behavior.
Dictionary of the History of Ideas
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This is in response to positive hydrotropism ( "water-turning" G).
The Human Brain
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Like other interactions between organisms and their environments, plant phototropism can be thought of as a process involving three phases: perception, transduction and response.
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More recently, however, the Arabidopsis root movements were reinterpreted as the combined effect of essentially three processes, circumnuation, gravitropism and negative thigmotropism.
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An envelope glycoprotein on the surface is thought to be responsible for mediating viral entry into cells, tissue tropism, and host range.
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These analyses indicate that the application of new genetic screens for dissecting complex signaling phenomena such as hydrotropism is promising.
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It is easy to call these changes by the name allotropism, but not the less do they confound our hasty generalizations.
Medical Essays, 1842-1882
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Whether thermotropism would explain the observed relative preference of this parasite for chickens, which have a slightly higher body temperature than guinea pigs, remains to be determined.
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Wiesner's papers on heliotropism are in the "Denkschriften" of the Vienna Academy, Volumes
More Letters of Charles Darwin — Volume 2
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The modest light gradient experienced by the tree is counteracted by a continuous gravitational influence, known as gravitropism, which guides plant growth upward.
Scientific American
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Geotropism occurs in two forms: positive geotropism to which the root responds by growing downward; and a negative geotropism, which causes the stem to grow upward.
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Our experiment proved that hydrotropism really does exist, and watering the plants differently affects root growth.
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Clearly, such a rise in genetic diversity may also have important phenotypic implications, such as the emergence of viruses with altered antigenicity, virulence, or tissue tropism.
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It is proposed that these and related mechanosensitive channels may participate in a variety of responses to temperature, including thermotropism, hydrotropism, and both cold damage and cold acclimation.
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PINOID kinase regulates root gravitropism through modulation of PIN2-dependent basipetal auxin transport in Arabidopsis thaliana.
SpaceRef Top Stories
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Our data demonstrate that factors in addition to the amount of PrP expressed determine the tropism of prions for certain tissues.
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(Strangely, plants use the gene as part of their system for sensing gravity, called gravitropism.)
PhysOrg.com - latest science and technology news stories
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The adaptive significance of solar tracking in snow buttercups is mediated through the impact of flower heliotropism on paternal and maternal floral environments.
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The latter is known as a photoreceptor, for example, for phototropism, stomatal aperture and entrainment of endogenous rhythms in plants and animals.
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We do not understand how the peculiar conditions just mentioned conspire to produce the result; but the whole phenomenon seems to be mysteriously connected with ozonized oxygen, and is undoubtedly another phase of that obscure subject, allotropism, to which we alluded in a previous lecture.
Religion and Chemistry
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Maybe there's some phototropism in there as well they seem to be moving to the shadow at the top?
Clustering of the intertidal snail Batillaria minima
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Transversal geotropism is a direction of growth that is vertical to the shoot axis.
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Finally, decapitated roots don't seem to show hydrotropism, which hints at the root caps playing a major role in this phenomena.
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Second, exploring the objective mode and merit tropism of constituting administrative procedures code in our country.
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Self-interest demand of state actor makes it form foreign policy tropism of isolation and nonalignment under the special culture ideas.
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Since then, the study of phototropism has been a cornerstone of plant science research.
News from The Scientist
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It would, therefore, be a misconception to speak of tropism as of reflexes, since tropisms are reactions of the organism as a whole, while reflexes are reactions of isolated segments.
Manhood of Humanity.
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A profound study of the motions of the Infusoria and a very penetrating criticism of the idea of tropism have been made recently by
Evolution créatrice. English
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Thus it was that the interpretations of J. Loeb (Die Tropismen, 1913) on the basis of experiments done with lower animals, estab - lished the neologist ideas of “phototropism” (orien - tation or displacement reaction in the direction of light), and of “thermotropism” (reaction directed to - wards a source of heat), to explain animal and perhaps also human behavior.
Dictionary of the History of Ideas
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Almost 200 years ago, researchers first began to characterize plant responses to sunlight-among them, the propensity of a plant's tip to grow towards the light and its root to grow away from the light, a phenomenon called phototropism.
News from The Scientist
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They give the quintessence of laboratory experiments as to what are the effects of different energies such as light (heliotropism), electricity (galvanotropism), gravity (geotropism), etc., in their reaction and influence upon the movements and actions of living organisms.
Manhood of Humanity.
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Here a complicated set of tropisms is involved from thigmotropism, or response to touch when the insect lights on the leaf, to a chemotropism in the secreting of digestive juices.
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Studies of chemotropism in yeast revealed important differences in the identity of the sensory pathways involved in gradient sensing in D. discoideum and Saccharomyces cerevisiae.
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It is curious that a hybrid Hedychium in my garden shows scarcely any trace of this paraheliotropism, while both the parent species are very paraheliotropic.
More Letters of Charles Darwin — Volume 2
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This is the best way to maximize grow space, minimize power consumption, and utilize geotropism to spread growth auxins throughout the plant.
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One of the earliest noted auxin effects was in phototropism, the curvature of stems toward a light source.
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Conclusions The activated carbon can be used as a useful lymphatic tracer and drug carrier, for it is characterized by avirulence, high lymphatic tropism, long residence time in the lymph nodes.
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The sensitiveness belonging to living substance, known by the names heliotropism, chemotropism, etc., is like a sketch of sensation and of the reactions following it; organic memory is the basis and the obliterated form of conscious memory.
Essai sur l'imagination créatrice. English
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They took photos to document phototropism in plants - how plants grow in the direction of the sun - and erosion.
Undefined
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Phototropism is a plant's growth response to a direct light source and gravitropism is its growth in response to gravity.
PhysOrg.com - latest science and technology news stories
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A team of biologists from the University of California, Riverside has used chemical genomics to identify novel compounds that affect the ability of plants to alter their direction of growth in response to gravity, a phenomenon known as gravitropism.
NASA Watch: Keith Cowing: March 2005 Archives
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In my experience women hunted men with quite the same blind tropism that marks the pursuit of the sun by the sunflower, the pursuit of attachable surfaces by the tendrils of the grapevine.
CHAPTER VIII
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Perhaps they have not studied the mystery of allotropism in the emotions of the human heart.
Elsie Venner
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This protein is embedded in and extends exterior to the viral lipid membrane and is primarily responsible for host cell receptor binding and host cell tropism.
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Pleiotropism is a hallmark of cytokines and growth factors; yet, the underlying mechanisms are not clearly understood.
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Are we to suppose that the upper half of the body or eye had a positive heliotropism and the lower half a negative heliotropism?
Hormones and Heredity
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Method:Using epidemic disease investigation center's CES-D, SAQ and tropism testing questionnaire as survey tools, we have carried out a questionnaire investigation among 1100 medical students.
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Winslow Briggs has been fascinated by phototropism for more than 50 years, chipping away at the mechanism behind it in his lab at Carnegie Institution's Department of Plant Biology at Stanford University.
News from The Scientist
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If the majority of mutations have large negative impacts on fitness, pleiotropism will act to increase their selective effects in nature.
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We do not understand how the peculiar conditions just mentioned conspire to produce the result; but the whole phenomenon seems to be mysteriously connected with ozonized oxygen, and is undoubtedly another phase of that obscure subject, allotropism, to which we alluded in a previous lecture.
Religion and Chemistry
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But the notion of chemotropism came to fruition only a decade later in the context of nerve regeneration.
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This remarkable phenomenon, which has been fully recognized only of late years, has been called by chemists allotropism, * and the diamond, plumbago, and charcoal are different allotropic modifications of the element carbon.
Religion and Chemistry
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And finally, Tim and Heather, the keepers of Tropism, continue to send me a few flash pieces per day as we work on our short-short collab, which is turning my email in-box into my favorite fiction venue of the moment.
Reading, good
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Besides the algae in their skin, they had altered hormone levels with predispositions toward heliotropism and nudity, plus numerous other "improvements.
Asimov's Science Fiction
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Endemic variety Cangzhou alfalfa was oppressed at hay yield, regeneration and orthotropism .
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During oviposition period, the male and female OAMs displayed certain tropism to the flowering rape and the milk vetch, the female OAMs performanced intense behavior of oviposition.
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Thus I am now observing something about geotropism, and I had no idea a few weeks ago that this would have been necessary.
More Letters of Charles Darwin — Volume 2
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The heliotropism itself is an adaptation for survival, the plant maximizing sunlight.
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These facts of allotropism have some corollaries connected with them rather startling to us of the nineteenth century.
Complete Project Gutenberg Oliver Wendell Holmes, Sr. Works
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Since plants possess no nerves, this identity of animal with plant heliotropism can offer but one inference -- these heliotropic effects must depend upon conditions which are common to both animals and plants.
Introduction to the Science of Sociology
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Since plants possess no nerves, this identity of animal with plant heliotropism can offer but one inference -- these heliotropic effects must depend upon conditions which are common to both animals and plants.
Introduction to the Science of Sociology
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Meanwhile, my co-workers showed the tropism of the virus for CD4T cells and identified the CD4 surface molecule as the main receptor to the virus.
Luc Montagnier - Autobiography
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Method:Using epidemic disease investigation center's CES-D, SAQ and tropism testing questionnaire as survey tools, we have carried out a questionnaire investigation among 1100 medical students.
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At first, mushroom primordia grow perpendicularly away from the surface from which they arise, independently of the direction of light or gravity, a response that may be some kind of negative thigmotropism or negative hydrotropism.
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They give the quintessence of laboratory experiments as to what are the effects of different energies such as light (heliotropism), electricity (galvanotropism), gravity (geotropism), etc., in their reaction and influence upon the movements and actions of living organisms.
Manhood of Humanity.
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Sensor cells for the presence of water are found in the root cap and studies indicated that calcium plays a role in the induction of root hydrotropism.
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Negative thigmotropism is movement away from an object, such as a root away from a rock in the soil.
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To account for the positive geotropism of roots, some researchers have proposed that under the influence of gravity, starch grains within the cells of the root fall towards the bottom of the cell.
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Phototropins mediate photomovement responses such as phototropism, chloroplast relocation and stomatal opening.
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Both of these types of reaction are tropisms merely; but the former are labile, conditionable; whereas the latter cannot be modified.
The Journal of Abnormal Psychology
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I think, the significance of this artistic tropism lies in that only artistic realm can distinct his works from others at the tide of this return to literator paintings traditions.
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Vienna (who has lately published a great book on heliotropism) finds that an intermittent light, say of 20 minutes, produces the same effect as a continuous light of, say 60 m.
More Letters of Charles Darwin — Volume 2
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At intervals, monkeys were inoculated intracerebrally to determine the neurotropism of the cultivated virus.
Max Theiler - Nobel Lecture
