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Search Results: 1 - 10 of 13 matches for " Alloatti "
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Mi historia de las mujeres
Norma Alloatti
Mora (Buenos Aires) , 2009,
Abstract:
Cuentos y lecciones: textos para los ni os decimonónicos en Argentina
Alloatti, N.
Ocnos , 2007,
Abstract: A mediados del siglo XIX empiezan a publicarse enArgentina los primeros textos de lectura y un pocomás tarde, aparece el primer libro de literatura infantil,ambos destinados a un público común. Pero estosdos objetos culturales que comienzan a gestarsesimultáneamente alcanzan en los primeros cincuentaa os de su publicación un desarrollo disímil.El punto de partida es una revisión de postuladosacerca del carácter moderno de este tipo de textosdestinados al público infantil. Dicha modernidadcoincide en Argentina con el nacimiento del estadonacional, fundado precisamente en la modernizaciónde las instituciones políticas y sociales.Este artículo explora también los factores queintervinieron para determinar el crecimiento continuode la edición de libros de lectura, alentada por sucondición para alfabetizar y la escasa importanciaotorgada a la incipiente literatura infantil, por suestilo asociado al entretenimiento. En consecuencia,se realiza un estudio de los conceptos que se hanestablecido sobre la ni ez decimonónica, para encontrarparte de la explicación de las diferencias en lapromoción, edición y recepción de cada tipo de texto.Finalmente, se plantea una aproximación al análisisde los contratiempos que pueden observarse en lapublicación de textos con autoría femenina. Aunqueel análisis no es exhaustivo en este punto, incumbeconjeturar que el descuido de la literatura infantilpuede haberse debido a una situación de manifiestaapatía por la literatura escrita por mujeres.
Conductance and density of states anomalies as resonances of energy bands in disordered coupled chains
L. Alloatti,G. Grosso
Physics , 2006,
Abstract: We show that off-diagonal nearest neighbor disorder in quasi-one-dimensional single particle tight-binding coupled chains leads to anomalies in the density of states and in the mean conductance, that can be interpreted as due to specific resonances of the band structure of the perfect system underlying the disordered one. We demonstrate that this phenomenology may appear not necessarily at the energy E=0 as reported so far in the literature and we show that also the even-odd chain number effect on the mean conductance is ruled by the same resonances. For different cases we provide a series expansion for the resonant contribution to the mean conductance. These expansions allow to make predictions well verified numerically.
Optical loss by surface transfer doping in silicon waveguides
Luca Alloatti,Christian Koos,Juerg Leuthold
Physics , 2015, DOI: 10.1063/1.4927313
Abstract: We show that undoped silicon waveguides may suffer of up to 1.8 dB/cm free-carrier absorption caused by improper surface passivation. To verify the effects of free-carriers we apply a gate field to the waveguides. Smallest losses correspond to higher electrical sheet resistances and are generally obtained with non-zero gate fields. The presence of free carriers for zero gate field is attributed to surface transfer doping. These results open new perspectives for minimizing propagation losses in silicon waveguides and for obtaining low-loss and highly conductive silicon films without applying a gate voltage.
大豆花叶病(smv)新抗性基因的初步鉴定
李得孝?,CHEN P?,Alloatti J?
西北农林科技大学学报(自然科学版) , 2009,
Abstract: [目的]鉴定出携带特异抗性基因的种质.[方法]利用美国的6个smv株系(g1~g3,g5~g7)对来自26个国家和地区的254份大豆种质进行人工接种鉴定.[结果]158份材料感所有病毒株系;95份材料抗某些病毒株系;只有7份种质兼抗所有6个鉴定株系:中国种质3份('kaigen'skingenzu'pi88486,pi62202和pi407733),法国种质1份('itosan'pi189920),韩国种质1份(pi84549),日本种质2份('shiromechoutan'pi417329和'tousan101'pi507439).14份材料对6个株系表现抗病或幼苗早期抗病,推测可能携带rsv4基因;50份材料对6个株系的反应型与已报道的抗性等位基因类似,推测其中携带rsv1抗性基因材料2份,rsv1-k22份,rsv1-y16份,rsv1-t1份,rsv310份.25份材料对6个smv株系表现型特殊,可能携带rsv1,rsv3,或rsv4位点新的等位基因.[结论]这些新的抗源可以用于smv抗病育种的亲本.
Relación entre las cantidades de cobre y zinc administradas a pacientes graves con nutrición parenteral total y los niveles de cobre y zinc en plasma y eritrocitos Relationship between the amount of copper and zinc given to critically ill patients on total parenteral nutrition and plasma and erythrocyte copper and zinc levels
A. M. Menéndez,A. Weisstaub,H. Montemerlo,S. Alloatti
Nutrición Hospitalaria , 2008,
Abstract: Objetivos: Evitar tanto las complicaciones por deficiencia de zinc y de cobre como los efectos adversos del exceso en pacientes graves que requirieron nutrición parenteral, estudiando la relación entre las cantidades de zinc y de cobre administradas en las mezclas de nutrición parenteral y los cambios en algunos indicadores bioquímicos de los pacientes, con respecto a zinc y cobre. Pacientes y metodología: 29 pacientes graves, adultos, con pancreatitis o sometidos a cirugía mayor abdominal. Se determinó, al inicio y al final del tratamiento (5-21 días): cobre y zinc en las mezclas de nutrición parenteral administradas y en eritrocitos (GR), zinc en plasma y cobre en suero (Espectrometría de Absorción Atómica). Resultados (promedio ± DE, rangos: entre paréntesis): los valores de zinc y cobre en las mezclas de nutrición parenteral fueron (μg/mL): zinc: 4,2 ± 1,7 (1,8 a 9,3); cobre: 0,94 ± 0,66 (0,1 a 3,1); zinc plasmático (μg/dl): inicio 80 ± 45 (29-205); final: 122 ± 56 (37-229); zinc eritrocitario (μg/dl): inicio: 2.300 ± 1.070 (790-5280); final: 2.160± 920 (790-4.440); cobre sérico (μg/dl): inicio: 124 ± 35 (62-211); final: 128 ± 41 (60-238); cobre eritrocitario (μg/dl): inicio: 72 ± 39 (4-183); final: 70 ± 41 (9-156). Los cambios porcentuales de los niveles de zinc eritrocitario correlacionaron con el zinc (mg/d) en las mezclas de nutrición parenteral (r = 0,38). Las variaciones de cobre sérico y eritrocitario correlacionaron positivamente con los valores de cobre administrado (mg/d) en las mezclas de nutrición parenteral (r = 0,31 y 0,26, respectivamente). Conclusiones: Estos resultados evidenciaron que: 1) las determinaciones de zinc eritrocitario, cobre sérico o eritrocitario serían de utilidad para controlar los niveles de zinc y de cobre administrados en las mezclas de nutrición parenteral a los pacientes graves; 2) las dosis de zinc deberían ser menores a 8,1 mg/d, y 3) no sería aconsejable administrar dosis de cobre superiores a 1,2 mg/d. Objectives: Complications resulting from zinc and copper deficiency, or adverse effects from excessive zinc and copper intake should be avoided during total parenteral nutrition (TPN). This study was conducted on critically ill patients requiring TPN to determine the relationship between the zinc and copper levels of the TPN mixtures, patients' clinical progression, and changes in plasma levels of zinc, serum levels of copper, and erythrocyte levels of zinc and copper. Patients and methods: 29 adult critically ill patients following pancreatitis or after a major abdominal surgery were studied. Zinc and copper l
Obestatin induced recovery of myocardial dysfunction in type 1 diabetic rats: underlying mechanisms
Manuela Aragno, Raffaella Mastrocola, Corrado Ghé, Elisa Arnoletti, Eleonora Bassino, Giuseppe Alloatti, Giampiero Muccioli
Cardiovascular Diabetology , 2012, DOI: 10.1186/1475-2840-11-129
Abstract: Diabetes was induced by STZ injection (50 mg/kg) in Wistar rats (DM). OB was administered (25 μg/kg) twice a day for 6 weeks. Non-diabetic (ND) rats and DM rats were distributed into four groups: untreated ND, OB-treated ND, untreated DM, OB-treated DM. Cardiac contractility and ?-adrenergic response were studied on isolated papillary muscles. Phosphorylation of AMPK, Akt, ERK1/2 and GSK3? as well ?-1 adrenoreceptors levels were detected by western blot, while α-MHC was measured by RT-PCR.OB preserved papillary muscle contractility (85 vs 27% of ND), ?-adrenergic response (103 vs 65% of ND), as well ?1-adrenoreceptors and α-MHC levels in diabetic myocardial tissue. Moreover, OB up-regulated the survival kinases Akt and ERK1/2, and enhanced AMPK and GSK3? phosphorylation. OB corrected oxidative unbalance, reduced pro-inflammatory cytokine TNF-α plasma levels, NFkB translocation and pro-fibrogenic factors expression in diabetic myocardium.OB displays a significant beneficial effect against the alterations of contractility and ?-adrenergic response in the heart of STZ-treated diabetic rats, which was mainly associated with the ability of OB to up-regulate the transcription of ?1-adrenergic receptors and α-MHC; this protective effect was accompanied by the ability to restore oxidative balance and to promote phosphorylation/modulation of AMPK and pro-survival kinases such as Akt, ERK1/2 and GSK3?.Obestatin (OB) is a newly discovered peptide encoded by the ghrelin gene together with acylated (AG) and unacylated ghrelin (UAG), produced in the oxyntic mucosa of the stomach [1-3]. It has been initially suggested that OB behaves as a physiological opponent to ghrelin, through interaction with the orphan G-protein-coupled receptor 39 (GPR39) [4]. However, these findings have been questioned lately and a number of studies have failed to confirm the anorexigenic effect of obestatin [5-7] and its agonist properties on GPR39 [8,9]. Therefore, to date, some biological actions of OB
Niveles plasmáticos y eritrocitarios de zinc y cobre en pacientes críticos con nutrición parenteral y su relación con el contenido de las fórmulas: estudio preliminar Plasmatic and erythrocytic zinc and copper levels in critically ill patients on parenteral nutrition and their relationship with formulas content: preliminary study
A. M.a Menéndez,H. Montemerlo,A. R. Weisstaub,S. Alloatti
Nutrición Hospitalaria , 2005,
Abstract: Objetivo: Estudiar, en pacientes graves que requirieron nutrición parenteral, la relación entre las cantidades de Zn y Cu presentes en las fórmulas, la evolución clínica y los cambios en algunos parámetros bioquímicos (niveles plasmáticos y eritrocitarios de Zn y Cu) durante terapéutica nutricional parenteral. Pacientes y metodología: Se estudiaron 5 pacientes graves, adultos, sometidos a cirugía mayor abdominal, que requirieron nutrición parenteral. Se determinó: 1) zinc y cobre en las fórmulas parenterales; 2) en los pacientes, al comienzo (To) y al final (Tf) del tratamiento, en eritrocitos: Zinc (Zn-E) y Cobre (Cu-E); en plasma, Zinc (Zn-Pl) y en suero, core (Cu-S). Zinc y Cobre se determinaron por espectrometría de absorción atómica. Resultados: Los valores promedio ± desvío estándar y rangos (entre paréntesis) fueron: fórmulas parenterales (μg/g): zinc: 6,0 ± 1,1 (2,2-7,0); cobre: 2,4 ± 0,7 (0,5-3,7). Parámetros bioquímicos: a To (n = 5); Zn-E (μg/ml): 21,6 ± 10,0 (13,6-36,1); Zn-Pl (μg/dl): 88 ± 72 (29-205); Cu-E (μg/dl): 113 ± 22 (83=144); Cu-S (μg/dl): 119 ± 24 (80-140). Dos pacientes murieron y en los 3 pacientes con evolución favorable los resultados fueron a Tf: Zn-E (μg/ml): 16,6 ± 0,1 (16,6-16,7); Zn-Pl (μg/dl): 77 ± 22 (60-102); Cu-E (μg/dl): 139 ± 29 (106-156); Cu-S (μg/dl): 172 ± 20 (158-195). Los resultados individuales comparados con los de referencia (individuos normales de Buenos Aires, con adecuación nutricional) indicaron que los 3 pacientes con evolución favorable normalizaron los niveles de Zn-Pl y Zn-E. sin embargo, el Cu-S se incrementó en los 3 casos y el Cu-E en 2 de ellos. Conclusiones: Estos resultados evidencias que, en los pacientes estudiados, los niveles de zinc en las fórmulas parenterales serían adecuados para evitar la deficiencia, mientras que los de cobre podrían ser elevados. Objectives: To study in severe patients that required parenteral nutrition the relationship between Zn and Cu amounts present in formulas, the clinical course and changes in some biochemical parameters (plasmatic and erythrocytic Zn and Cu levels) during the parenteral nutrition therapy. Patients and methodology: Five adult severe patients were studied, submitted to major abdominal surgery, and that required parenteral nutrition. Determinations were done for: 1) Zinc and copper in parenteral formulas; 2) in patients, at the beginning (T0) and at the end (Tf) of treatment, in erythrocytes: zinc (Zn-E) and cupper (Cu-E); in plasma, zinc (ZnPl) and in serum, cupper (Cu-S). Zinc and cupper were determined by means of atomic absorbance spec-trome
Photonics design tool for advanced CMOS nodes
Luca Alloatti,Mark Wade,Vladimir Stojanovic,Milos Popovic,Rajeev Jagga Ram
Physics , 2015, DOI: 10.1049/iet-opt.2015.0003
Abstract: Recently, the authors have demonstrated large-scale integrated systems with several million transistors and hundreds of photonic elements. Yielding such large-scale integrated systems requires a design-for-manufacture rigour that is embodied in the 10 000 to 50 000 design rules that these designs must comply within advanced complementary metal-oxide semiconductor manufacturing. Here, the authors present a photonic design automation tool which allows automatic generation of layouts without design-rule violations. This tool is written in SKILL, the native language of the mainstream electric design automation software, Cadence. This allows seamless integration of photonic and electronic design in a single environment. The tool leverages intuitive photonic layer definitions, allowing the designer to focus on the physical properties rather than on technology-dependent details. For the first time the authors present an algorithm for removal of design-rule violations from photonic layouts based on Manhattan discretisation, Boolean and sizing operations. This algorithm is not limited to the implementation in SKILL, and can in principle be implemented in any scripting language. Connectivity is achieved with software-defined waveguide ports and low-level procedures that enable auto-routing of waveguide connections.
Relación entre las cantidades de cobre y zinc administradas a pacientes graves con nutrición parenteral total y los niveles de cobre y zinc en plasma y eritrocitos
Menéndez,A. M.; Weisstaub,A.; Montemerlo,H.; Alloatti,S.; Guidoni,M. E.; Rusi,F.; Portela,M. L. de;
Nutrición Hospitalaria , 2008,
Abstract: objectives: complications resulting from zinc and copper deficiency, or adverse effects from excessive zinc and copper intake should be avoided during total parenteral nutrition (tpn). this study was conducted on critically ill patients requiring tpn to determine the relationship between the zinc and copper levels of the tpn mixtures, patients' clinical progression, and changes in plasma levels of zinc, serum levels of copper, and erythrocyte levels of zinc and copper. patients and methods: 29 adult critically ill patients following pancreatitis or after a major abdominal surgery were studied. zinc and copper levels in tpn, plasmatic zinc levels, copper serum levels and erythrocyte levels of zinc and copper were determined at the onset and at the end of the treatment (5-21 days) (using atomic absorption spectrometry). results: the mean ± standard deviation (and ranges in parenthesis) of zinc and copper levels in tpn were (μg/ml): zinc: 4.2 ± 1.7 (1.8 a 9.3); copper: 0.94 ± 0.66 (0.1 a 3.1). biochemical parameters at the onset and at the end of the treatment were, respectively: (μg/ml): plasmatic zinc: 80 ± 45 (29-205) and 122 ± 56 (37-229); erythrocyte zinc: 2,300 ± 1,070 (790-5,280) and 2,160 ± 920 (790-4,440); serum copper (μg/dl): 124 ± 35 (62-211) and 128 ± 41 (60- 238); erythrocyte copper (μg/dl): 72 ± 39 (4-183) and 70 ± 41 (9-156). plasmatic and erythrocyte zinc levels did not correlated neither at the onset nor at the end of the treatment. changes in erythrocyte zinc levels correlated with daily administered zinc (mg/d) in the parenteral nutrition (r = 0.38). serum copper and erythrocyte copper showed significant correlation at the onset (p = 0.0005) and at the end of treatment (p = 0.008). changes of serum or erythrocyte copper levels showed a significant correlation with daily administered copper (r = 0.31 and 0.26, respectively). conclusions: these results show that: 1) determination of erythrocyte zinc and copper levels in these critically ill patients w
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