نتایج جستجو برای: xenopus

تعداد نتایج: 18432  

2008
Marie K. Cross Maureen Powers

The eggs of Xenopus laevis intact, lysed, and/or fractionated are useful for a wide variety of experiments. This protocol shows how to induce egg laying, collect and dejelly the eggs, and sort the eggs to remove any damaged eggs.

1999
Fumie Costen John Brooke Mike Pettipher

Journal: :The Journal of experimental biology 1974
M G Emilio G Shelton

Journal: :Biochimica et biophysica acta 1999
W Weber

2. The biology of the oocyte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 2.1. Oogenesis and development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 2.2. Bioelectrical properties of the oocyte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 2.3. The oocyte at work...

1998
F. de Campos

We derive bounds on Higgs and gauge–boson anomalous interactions using the CDF data for the process pp̄ → γγγ + X. We use a linearly realized SUL(2) × UY (1) invariant effective Lagrangian to describe the bosonic sector of the Standard Model, keeping the fermionic couplings unchanged. All dimension–six operators that lead to anomalous Higgs interactions involving γ and Z are considered. We also ...

Journal: :Journal of embryology and experimental morphology 1979
T Gindi J Knowland

The activity of cholinesterases during the early development of Xenopus laevis has been examined, and the activity of acetylcholinesterase in particular has been distinguished from other cholinesterases. In contrast to some earlier findings, the activity of acetylcholinesterase is low at early stages and gradually increases during development. Possible reasons for the differences between the ea...

2000
Wei - Shu Hou A. Soni

We point out new ways to search for charmless baryonic B decays: baryon pair production in association with η ′ is very likely as large as or even a bit larger than two body Kπ/ππ modes. We extend our argument, in weaker form, to B → γ + X s and ℓν + X. Although calculations are not reliable, estimates give branching ratios of order 10 −5 –10 −6 , where confidence is gained from recent experime...

Journal: :Seminars in cell & developmental biology 2016
Burcu Erdogan Patrick T Ebbert Laura Anne Lowery

The intricate and precise establishment of neuronal connections in the developing nervous system relies on accurate navigation of growing axons. Since Ramón y Cajal's discovery of the growth cone, the phenomenon of axon guidance has been revealed as a coordinated operation of guidance molecules, receptors, secondary messengers, and responses driven by the dynamic cytoskeleton within the growth ...

Journal: :Journal of embryology and experimental morphology 1978
M Stanisstreet J L Smith

Cells have been dissociated from Xenopus and Ambystoma late blastulae, allowed to adhere to glass coverslips, and studied by scanning electron microscopy. Xenopus ectoderm cells initially show filopodia; later larger single pseudopodia are formed. Ambystoma ectoderm cells show fewer filopodia than Xenopus ectoderm, but later form pseudopodia. Ectoderm cells of both Xenopus and Ambystoma show li...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1980
W J Wasserman L H Pinto C M O'Connor L D Smith

Progesterone causes a rapid increase in the intracellular free calcium level in fully grown amphibian oocytes. When albino Xenopus laevis oocytes were microinjected with the Ca-specific photoprotein aequorin, the calcium-induced luminescence from this protein increased at 40-60 sec after the addition of progesterone and returned to the control level within 5-6 min. No further change in the aequ...

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