A 3 copies of the manuscript A please indicate the corresponding author's details on the manuscript (tel/fax/e-mail) A 3 sets of figures A electronic version of the manuscript (Label the floppy disk with the type of computer and word processing package used, your name and the name of the file on the disk.) A electronic version of the figures For Review Papers: A 3 copies of the manuscript A ple...

A 4 copies of the manuscript A please indicate the corresponding author's details on the manuscript (tel/fax/e-mail) A 4 sets of figures A electronic version of the manuscript (Label the floppy disk with the type of computer and word processing package used, your name and the name of the file on the disk.) A electronic version of the figures (optional, see instructions below) For Review Papers:...

A testicular paracrine factor, P-Mod-S, was purified from conditioned medium obtained from serum-free cultures of peritubular cells. Stimulation of testicular transferrin production by cultured Sertoli cells was utilized as a bio-assay for P-Mod-S. A bioactive protein with an apparent molecular weight of 50,000 under physiological conditions was isolated by high pressure size exclusion chromato...

Wolbachia pipientis is a bacterium that induces cytoplasmic incompatibility (CI), the phenomenon in which infected males are reproductively incompatible with uninfected females. CI spreads in a population of hosts because it reduces the fitness of uninfected females relative to infected females. CI encompasses two steps: modification (mod) of sperm of infected males and rescuing (resc) of these...

On primitive roots of 1 mod p k , divisors of p 2 − 1 , Wieferich primes and quadratic analysis mod p Abstract Primitive roots of 1 mod p k (k > 2 and odd prime p) are sought, in cyclic units group G k ≡ A k B k mod p k , coprime to p, of order (p − 1)p k−1. 'Core' subgroup A k has order p − 1 independent of precision k, and 'extension' subgroup B k of all p k−1 residues 1 mod p is generated by...

We establish congruences for higher order Euler polynomials modulo 720. apply this result constructing analogues of Stern secant numbers $E_{4n}\equiv 5(\mathrm{mod}\ 60), E_{4n+2}\equiv -1(\mathrm{mod}\ 60)$ to tangent and Genocchi numbers. prove that satisfy the following $E_{4n+1}\equiv 16(\mathrm{mod}\ 720)$, $E_{4n+3}\equiv -272(\mathrm{mod}\ 720)$. 12-periodic property 45.

The Degree in Library Science and Documentation of the University León started during 1990–1991 academic year. This first curriculum suffered from a strong presence subjects humanities, with low fraction experimental work many because its inclusion within Faculty Philosophy Letters. years attracted large numbers students. However, subsequent decrease number students pursuing degree drove us to ...