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We study cluster algebras associated to a quiver equipped with a group of admissible automorphisms. This enables us to realize cluster algebras of non simply laced types as quotients of cluster algebras of simply laced types. We then generalize well known results on cluster algebras as denominators theorems and, under some conditions, the linear(More)
UNLABELLED This study investigated in severe sepsis the metabolic effects of two amino acid diets, including the same protein (0.3 gN/kg/day) and caloric intake (2g/kg/day glucose) but with different amino acid composition, 24% branched chain amino-acids (B.C.A.A.) for diet A (8 cases), 41% B.C.A.A. for diet B (11 cases). The two groups were obtained by(More)
BACKGROUND Marchiafava-Bignami disease or corpus callosum necrosis, is an uncommon complication of chronic alcoholism. Prognosis is severe. CASE REPORTS Two young adults with chronic alcoholism who developed Marchiafava-Bignami disease initially improved clinically. DISCUSSION Diagnosis has been facilitated with MRI. An MRI exploration should be(More)
Creatinine clearance (Ccr) is a good predictor of renal dysfunction. However, numerous analytical interferences have been observed with the classical measurement of creatinine by Jaffé's procedure. This prospective study was conducted to compare 4 methods for determining creatinine; and also endogenous creatinine clearance with inulin clearance (Cin) to(More)
Let b, c be positive integers, x1, x2 be indeterminates over Z and xm,m ∈ Z be rational functions defined by xm−1xm+1 = x b m+1 if m is odd and xm−1xm+1 = x c m+1 if m is even. In this short note, we prove that for any m,k ∈ Z, xk can be expressed as a substraction-free Laurent polynomial in Z[x±1 m , x ±1 m+1]. This proves FominZelevinsky’s positivity(More)
Normal serum prolactin levels range from 5 to 20 ng/ml (circadian rhythm, effect of stress, relation with estrogen secretion). Neuroleptics increase serum prolactin levels. Normal concentrations are restored within 24 to 48 hours of discontinuation of the drug. When neuroleptics are given for a long period of time, serum prolactin concentrations fall(More)