In the South African clawed frog Xenopus laevis, the larval intestine is a simple tubular structure consisting of a single layer of primary epithelium and thin layers of connective tissue and muscles.
Embryonic stem cells were cultured on a feeder layer of primary cultured mouse embryonic fibroblasts in Dulbecco's modified Eagle's medium containing 15% heat-inactivated fetal calf serum, 7 × 10−6 µl/ml 2-mercaptoethanol, and 2 µl/ml leukemia inhibitory factor to maintain pluripotency.
It will cut out a layer of bureaucracy – the primary care trusts – and ensure those with the best information on their patients, and the best incentives to be efficient, are taking charge.
This survival advantage has been a result of the absence of tumor contamination within the confines of the pelvis because of a meticulous dissection which maintains a layer of tissue between the primary malignancy and the margins of resection [ 9].
ES cells were grown on a layer of mitomycin C-inactivated primary fibroblasts in DMEM, 15% FBS (Euroclone, Pero (MI) Italy), 2 mM glutamine (Life Technologies), 1 mM sodium pyruvate (Life Technologies), 1× non-essential amino acids (Life Technologies), 50 ug/ml penicillin/streptomycin (Life Technologies), 1000 units/ml leukemia inhibitory factor (LIF, Chemicon), and 0.1 mM β-mercaptoethanol.
The secondary vascular tissue arises from the vascular cambium, a layer of meristematic tissue insinuated between the primary xylem and primary phloem (see above Vascular tissue).
By applying voltage between the anode electrode and cathode electrode on the aluminum surface, a layer of flat oxide surface is produced and proceeds with the dissolution of some oxide area (surface defects) within the electrolyte, and with the dissolution tendency of the oxide layer of primary hollow points, holes are created on the surface.
The few intracellular bacilli found were either located in the outer lymphocyte and epithelioid macrophage cell layer of primary granulomas or in secondary lesions, although this latter location rarely contained any detectable AR+ M. tuberculosis bacilli at all.
The layer of primary spermatocytes was very thin as compared to the healthy control group, only some of them undergoing meiosis.
