287 research outputs found
On ideals with the Rees property
A homogeneous ideal of a polynomial ring is said to have the Rees
property if, for any homogeneous ideal which contains , the
number of generators of is smaller than or equal to that of . A
homogeneous ideal is said to be -full if for some , where is the graded maximal
ideal of . It was proved by one of the authors that -full
ideals have the Rees property and that the converse holds in a polynomial ring
with two variables. In this note, we give examples of ideals which have the
Rees property but are not -full in a polynomial ring with more
than two variables. To prove this result, we also show that every Artinian
monomial almost complete intersection in three variables has the Sperner
property.Comment: 8 page
Metabolic and Stress Responses in Senegalese Soles (Solea senegalensis Kaup) Fed Tryptophan Supplements: E ects of Concentration and Feeding Period
The objective of this study was to assess the impact of di erent dietary Trp concentrations on
the stress and metabolism response of juvenile Senegalese soles (Solea senegalensis). Fish (38.1 1.9 g)
were fed di erent Trp-enriched feeds (0%, 1% and 2% Trp added) for two and eight days, and later
exposed to air stress for three min. Samples were taken pre- and 1 h post-stress (condition). Plasma
cortisol, lactate, glucose and proteins were significantly a ected by the sampling time, showing higher
values at 1 h post-stress. Trp concentration in food also had significant e ects on lactate and glucose
levels. However, the feeding period did not a ect these parameters. Post-stress values were higher
than in the pre-stress condition for every plasma parameter, except for lactate in two days and 1% Trp
treatment. Nevertheless, cortisol, glucose and lactate did not vary significantly between pre- and
post-stress samplings in fish fed the 1% Trp-enriched diet for two days. The lack of variability in
cortisol response was also due to the high pre-stress value, significantly superior to pre-stress control.
The exposure time to Trp feeding did not significantly a ect any enzyme activity; however, Trp added
and condition influenced protein-related enzyme activities. In spite of decreasing stress markers,
Trp-enriched diets altered the protein metabolism
Baseline genotype testing to assess drug resistance before beginning HIV treatment
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The minimal resolution conjecture on a general quartic surface in P3
Mustaţă has given a conjecture for the graded Betti numbers in the minimal free resolution of the ideal of a general set of points on an irreducible projective algebraic variety. For surfaces in P3 this conjecture has been proven for points on quadric surfaces and on general cubic surfaces. In the latter case, Gorenstein liaison was the main tool. Here we prove the conjecture for general quartic surfaces. Gorenstein liaison continues to be a central tool, but to prove the existence of our links we make use of certain dimension computations. We also discuss the higher degree case, but now the dimension count does not force the existence of our links
Colorectal Adenomas
Carta a l'editor com a resposta al document: https://doi.org/10.1056/NEJMra1513581In his review article, Strum (March 17 issue)1 provides data on the overall prevalence of colorectal adenomas in the United States and risk factors for these lesions. It is well established that patients with Streptococcus bovis–group infective endocarditis are at high risk for colorectal cancer.2 Although a strong relationship between Enterococcus faecalis endocarditis and colorectal adenomas is suspected, robust data are lacking
On the Weak Lefcchetz property for artinian Gorenstein algebras
We study the problem of whether an arbitrary codimension three graded artinian Gorenstein algebra has the Weak Lefschetz Property. We reduce this problem to checking whether it holds for all compressed Gorenstein algebras of odd socle degree. In the first open case, namely Hilbert function , we give a complete answer in every characteristic by translating the problem to one of studying geometric aspects of certain morphisms from to , and Hesse configurations in
Infeccions bacterianes i fungiques en adictes a drogues per via parenteral
L'addicció a drogues per via parenteral i les seves complicacions mèdiques constitueixen en el nostre país un problema real i greu. Avui dia no sorprén a ningú que els mitjans de difusio social i les revistes mèdiques nacionals es facin ressó, quasi cada dia, d'algun deis múltiples problemes relacionats amb la drogaaddicció, com poden ser la mort d'heroínomans per sobredosi o la descripció de complicacions infeccioses greus. Hi han alguns hospitals urbans els addictes a drogues per via parenteral (ADVP) representen un percentatge important del total de consultes en els Serveis d'Urgències i del total d'ingresos, sobretot en determinades Àrees Mèdiques com Unitats de Cures Intensives o Serveis d'Infeccions. El motiu de la consulta van des de la recerca d'un tractament per a la seva dependència física o psíquica fins a l'aparició de complicacions infeccioses greus o Taturada cardio-respiratòria per sobredosi. Quasi sense haver-nos-en adonat ens trobem davant d'una vertadera 'epidèmia', de gran magnitud i que tendeix a augmentar, les conseqüéncies socials i sanitàries de la qual son difícils de preveure
Characterization of Ceramic Materials Synthesized by Mechanosynthesis for Energy Applications
Estudio preliminar de la curva de crecimiento de la raza Bovina Marismeña en cebadero convencional
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