At hatching, a typical salamander larva has eyes without lids, teeth in both upper and lower jaws, three pairs of feathery external gills and a long, somewhat laterally flattened body and tail with dorsal and ventral fins.

At low concentrations it forms ventral interneurones, at higher concentrations it induces motor neuron development, and at highest concentrations it induces floor plate differentiation.

At the dorsal and ventral aspect of the lumen are vomeronasal glands, which fill the vomeronasal lumen with fluid.

At the medial leminiscus, axons from the leg are more ventral, and axons from the arm are more dorsal.

At the pool's far end was the little cabana Joyce had mentioned, and on the water's surface floated scattered lavender patches of limp-looking lather.

At either end and in the center there are bays which contain nine greater alcoves as frescoed and capacious as church apses.

At the beginning of the play she has partial illumination and at the end she has complete illumination, but there has been no question but that she moves toward the dark.

At four-o'clock, or four-thirty, the coming of the newsboy marked the end of the day ; ;

At the end of this period two pious Christians in Rome receive the revelation which leads them to seek the next Pope on the rock.

At the end of World War 2,, free Europe was ready for a new beginning.

At the very end, when the audience was silent and breathless, a collection was taken and then slowly everyone filed out.

At the end of the monologue the audience would applaud.

At the end of a shaft of light, the pews appeared to be broad stairs in a long dungeon.

At the end of the room there was a desk heaped with papers, and she began to riffle these, making sighs and and noises of girlish exasperation.

At the other end of the spectrum, where the more advanced countries can be relied upon to make well thought through decisions as to project priorities within a consistent program, we should be prepared to depart substantially from detailed project approval as the basis for granting assistance and to move toward long-term support, in cooperation with other developed countries, of the essential foreign exchange requirements of the country's development program.

At the end of its letter was the information that applicants for this position `` must also be prepared to teach costume design and advertising art ''.

At the end of the run, the strips in the third and sixth positions in each chamber were dried, stained for 1 hr, washed and dried, while the other strips were maintained in a horizontal position at 1-degree-C.

At the end of work one day, the personnel man took the applicants one at a time, asked them to sit behind the receptionist's desk and he then played the role of a number of people who might come to the receptionist with a number of queries and for a number of purposes.

At the end of this pass, the table indicates which index words and electronic switches are not available for assignment to symbolic references.

At the same time, every device that can be employed to reduce the number of variables is of the greatest value, and it is one of the attractive features of dynamic programming that room is left for ingenuity in using the special features of the problem to this end.

At the end of the calculated time he'd nose the Waco down through the cloud bank and hope to break through where some feature of the winter landscape would be recognizable.

At the end of the performance, Dave and Max came out into the brilliantly lit foyer among a surge of gowned and tuxedoed first nighters.

At the end of the half-hour, racking his brains, thinking over and over again of Kitti, her friends, her past, he left the bedroom.

At the end of the corridor Alec noticed a door marked: Fire Stairs.

At the end of the program, indeed, there was a demonstration that lasted for forty-five minutes, and nothing could stop it.

At war's end leadership in Western Europe passed from Britain because the Labour Government devoted its attention to the creation of a welfare state.

At the end of the Devonian period (), the seas, rivers and lakes were teeming with life but the land was the realm of early plants and devoid of vertebrates though some, such as Ichthyostega, may have sometimes hauled themselves out of the water.

At the American publisher's insistence, Burgess allowed their editors to cut the redeeming final chapter from the U. S. version, so that the tale would end on a darker note, with Alex succumbing to his violent, reckless nature — an ending which the publisher insisted would be ' more realistic ' and appealing to a U. S. audience.

At the end of World War II the US Army occupied Obersalzberg, to prevent Hitler from retreating with the Wehrmacht into the mountains.

At this time, the embryo usually consists of 50 cells.

At left is an embryo 4 weeks after fertilization ( i. e. 6 weeks gestational age | LMP ).

At the point of constriction where the primitive digestive tube of the embryo joins the yolk sac a reflection or folding upward of the somatopleure takes place.

At that time, the embryo of Bangladesh Air Force ( BAF ) was formed with less than hundred officers and airmen.

At first, the nuclei of the early embryo rapidly and synchronously divide in the " syncytial " blastoderm and then migrate through the cytoplasm and position themselves in a monolayer around the periphery, leaving only a small number of nuclei in the center of the egg, which will become yolk nuclei.

At this time, segments of the embryo become visible, creating a striped arrangement along the anterior-posterior axis.

* At the dorsal end of the embryo, blastoderm nuclei exposed to little or no dorsal protein express only zerknüllt & decapentaplegic.

At this time, the embryo has well-developed external gills and a spiral valve intestine.

At a length of, the embryo grows two massive, recurved " fangs " in the lower jaw for tearing open capsules, as well as two much smaller teeth in the upper jaw.

At long, the embryo appears pink because it lacks pigment except in its eyes, and its head and gill region are laterally enlarged and gelatinous.

At times, clumps of 10 to 15 closely-packed nuclei were also observed.

At various stages of stellar evolution, the nuclei required for this process will be exhausted, and the core will collapse, causing it to become denser and hotter.

At the time, the multiple neutron absorption was thought to be an extremely rare process, but the identification of indicated that still more neutrons could have been captured by the uranium nuclei, thereby producing new elements heavier than californium.

At very high temperatures, such as those present in stars, it is assumed that essentially all electrons are " free ," and that a very high-energy plasma is essentially bare nuclei swimming in a sea of electrons.

At the same time it was clear that carbon was the next most common element, and also that there was a general trend toward abundance of light elements, especially those composed of whole numbers of helium-4 nuclei.

At the level of large scale anatomy, the cerebellum consists of a tightly folded and crumpled layer of cortex, with white matter underneath, several deep nuclei embedded in the white matter, and a fluid-filled ventricle at the base.

At lower excitation energy ( see neutron evaporation ), the effect of the shell will be enhanced and ground-state nuclei can be expected to have relatively long half-lives.

At this point helium nuclei are fusing together at a rate high enough to rival the rate at which their product, beryllium-8, decays back into two helium nuclei.

At the nuclear level, binding energy is also equal to the energy liberated when a nucleus is created from other nucleons or nuclei.

At very high temperatures, as in the environment of a black hole or neutron star, high energy photon interactions with nuclei or even with other photons, can create an electron-positron plasma.

At 1 – 3 days there is continued coagulation necrosis with loss of nuclei and striations and an increased infiltration of neutrophils to interstitium.

At this time, it had two nuclei: a fishermen's district, Sabugo, and the aristocratic centre, La Villa, standing each other across a small water inlet at the site of present-day Avilés ' main Park.

At the 1978 summer school in Erice he proposed the existence of broken supersymmetry in atomic nuclei, which has since been observed experimentally.

At some point, roughly one second after the Big Bang, the attractive force of nuclear attraction would begin to win out over the lower energy photons and neutrons and protons would begin to form stable deuterium nuclei.

At the time of the patent filing, both Lawrence Livermore National Laboratories and the USDA were only sorting fixed sperm nuclei, after the Application Serial Number 35, 986 patent filing a new technique was utilized by the USDA where " sperm were briefly sonicated to remove tails ".

At such high temperatures photodisintegration becomes a significant effect, so some neon nuclei decompose, releasing alpha particles:

At very short distances less than 0. 7 fm, it becomes repulsive, and is responsible for the physical size of nuclei, since the nucleons can come no closer than the force allows.