1,721,365 research outputs found
LH supplementation in down-regulated women undergoing assisted reproduction with baseline low serum LH levels
No full textGynecol Endocrinol. 2010 Feb;26(2):118-24.
LH supplementation in down-regulated women undergoing assisted reproduction with baseline low serum LH levels.
Pezzuto A, Ferrari B, Coppola F, Nardelli GB.
SourceDepartment of Obstetrics, Gynaecology and Neonatology, University of Parma, Centre for Reproductive Medicine, Parma, Italy. [email protected]
Abstract
AIM: The aim of our study is to evaluate the effect of recombinant-human LH supplementation on ovarian response and pregnancy outcome, during ovarian stimulation, in down-regulated women with baseline low serum LH levels undergoing assisted reproductive technology.
STUDY DESIGN: A prospective randomized study performed with 80 women, with serum LH levels 50.5 IU/l on cycle Day 6 of stimulation. Group-A (40): 14-days after down-regulation with leuprorelin, ovarian stimulation was initiated only with r-FSH 225 IU. Group-B (40): at the same time stimulation was initiated with rFSH 225 IU associated with rLH 75 UI on cycle Day 6 of stimulation.
RESULTS: Serum-E2 levels on the hCG-day administration were significantly reduced in the Group-A. FF-VEGF levels were higher in Group-A. We did not find significant differences in the number of retrieved oocytes. The quality of oocytes proved to be higher and more significant from a statistical point of view in Group-B. The number of embryos obtained and transferred, the pregnancy rate lower in Group-A.
CONCLUSIONS: In our study, it was shown that LH supplementation seems to have a beneficial effect on the maturity and fertilizability of oocyte. Lower FF VEGF levels, found in Group B, could be an indication of a lower apoptosis rate in human cumulus cells after administration of LH. We can affirm that LH-supplementation is beneficial in patients who show asignificant serum LH suppression during the receptorial down-regulatio
Martín Ojeda, Marina; Peale, C. George (eds.), (2017). Luis Vélez de Guevara en Écija: su entorno familiar, liberal y cultural. Newark (DE). Juan de la Cuesta
No full text“Mis ventanas ya no dan a los álamos y a los ríos de España”: radici spezzate in Entre el clavel y la espada di Rafael Alberti
No full textNell’articolo che qui si propone l’attenzione è rivolta a una suite della silloge Entre el clavel y la espada (1941) del poeta Rafael Alberti, intitolata “Toro en el mar (Elegía sobre un mapa perdido)”. L’intento è quello di illustrare, attraverso l’analisi tematica e simbolica dei suoi componimenti –in particolare il numero diciannove– la rappresentazione del lutto e della perdita che il poeta vive nei confronti della propria patria, dal momento in cui è costretto alla dolorosa esperienza d’esilio.In this paper the attention is focused on the section “Toro en el mar (Elegía sobre un mapa perdido)” from the book Entre el clavel y la espada (1941) by the poet Rafael Alberti. Through a thematic and symbolic analyses of its poems –more specifically number nineteen– the work aims to reflect on the representation of mourning and loss that the poet feels towards his homeland, since he is forced to live the painful experience of exile
Lope de Vega, Cartas (1604-1633), edición de Antonio Carreño, Madrid, Cátedra, 2018, pp. 684
No full text
Tras los pasos de Marie Curie: La ridícula idea de no volver a verte de Rosa Montero
No full textLa ridícula idea de no volver a verte, novela de Rosa Montero (2013), cuenta la historia de Marie Curie a partir de las páginas de su diario. El libro se centra también en los descubrimientos científicos de esta célebre mujer, prestando atención a la construcción de un diálogo del que emerge, entre ella y la autora, una simetría biográfica. El objetivo del artículo es reflexionar sobre el tipo de relato que ofrece la novela; sobre cuánto el diario de Curie representa un recurso y un estímulo para el proceso de redacción de Montero. Finalmente, se hace hincapié en cómo la presencia y el significado del tema científico vertebra y apuntala la narración hasta convertirla en un libro a-genérico, que fluctúa entre la autobiografía y la dicotomía verdad-ficción
Oxidative degradation of non-recycled and recycled paper
No full textThe degradation of paper-based materials involves several and complex mechanisms, such as hydrolysis and oxidation. The behaviour of different types of pulps can be very variable. In this study, the difference upon oxidation of contemporary non-recycled and recycled papers, which now constitute a considerable fibre source, is investigated. A 0.015 M potassium periodate solution is used to oxidise five types of paper, two non-recycled and three recycled, for 0.5, 1, 2 and 4 h. The effects of such oxidation treatments are evaluated in terms of carbonyl content and degree of polymerisation (DP). A modified procedure of the Szabolcs’s method and viscometry are used to measure the carbonyl content and DP, respectively. The carbonyl groups are found to increase more rapidly in the recycled papers than in the non-recycled ones. On the contrary, oxidation causes a larger decrease of the DP values in the non-recycled papers, the paper made of pure cellulose being the most sensitive in terms of depolymerisation. The DP values measured for pure cellulose paper are in line with previously reported data. Moreover, in accordance with the Ekenstam equation, the plots of the reciprocal of DP as a function of oxidation time show good linear correlations for all types of paper investigated. Pseudo rate constants are thus calculated from the slopes of these plots, those of the non-recycled papers being found to be higher than those of the recycled papers. Graphic abstract: [Figure not available: see fulltext.]
Reproductive behaviour in free-ranging crested porcupine Hystrix cristata L., 1758
Full text linkPrevious data on crested porcupine reproduction biology were mostly collected in captivity or semi-captivity due to its elusive, burrowing and mainly nocturnal habits. Between 2017 and 2019 the reproductive behaviour (i.e., intrapair mounting and copulation, birth and parental care) of free-ranging crested porcupine was documented and described. Nightly rhythms of single and multiple mounting occurred throughout the year while only two copulation events were recorded. Three months after both copulation events, the birth of porcupettes (porcupine < 5 kg) was recorded. A stochastic phase characterized by an articulate courtship with distinct behavioural patterns always preceded each mounting event. After the stochastic phase, the presenting of the female evoked by Nose-Quill contact behaviour, occurred in 83.8% (n = 182) of mounting events, while in 16.1% (n = 35) a spontaneous presenting of the female occurred. The average duration of copulation lasted 24 s (SD = 7 s) with 17 thrusting (SD = 5.5 thrusting). Births of porcupettes occurred throughout the year from 1 to 3 times per pair per year and the litter size observed ranged from 1 to 2 porcupettes. The first emerging of porcupettes from burrow occurred at 10–15 days after birth. Parents and sub-adults of the family actively perform parental care and the permanence of sub-adults within the family (i.e., from birth to dispersal) resulted to be at least 1 year. This investigation provides new useful insights on porcupine reproductive behaviour in the wild. Such new knowledge may be useful to the management of porcupines in wild, semiwild and captive condition as well as to delineate the key habitat desiderata of this rodent
The stones used for building the apse of the Pisa’s Cathedral (Italy)
No full textA detailed knowledge of the building materials and of their main characteristics is a fundamental pre-requisite for a good stonework’s restoration project. Nowadays Computer Aided Design (CAD) can be considered as an interesting tool for the achievement of stonework mapping and, more generally, to the management of a full restoration project. This paper presents the mapping of the building stones used in the apse of the Pisa’s Cathedral (XI century), with
the scope of highlighting the potential of photogrammetry and CAD techniques in the field of restoration and conservation of stonework. Once the survey of the apse masonry had been realized and the main geometry of each ashlar was detected, the building materials have been mostly identified by stone-to-stone visual inspection. For the recognition of the stones used for building the apse of the Pisa’s Cathedral, the macroscopic characteristics widely described in several papers on the stones of medieval buildings in Pisa (Franzini & Lezzerini, 2003 and references therein) were exploited, while for marbles analysis traditional methods, such as textural features, accessory minerals and C-O stable isotope data (Moens et al., 1992; Gorgoni et al., 2002; Capedri et al., 2004) were applied. Based on collected data, the Apse of Pisa’a Cathedral was mostly made up of Mt. Pisano and Apuan marbles and black limestones quarried at some kilometres northwest from Pisa in the Monti d’Oltre Serchio area. Re-used Marbles from quarries located in Eastern Mediterranean area (Turkey and Egypt) characterise the first construction phase of this monument. The lithotypes identified in intarsia of the apse are serpentinites of unknown origin, used as decorative stones for their marble-like qualities, and small elements of red limestone probably belonging to the Scaglia Rossa Formation of the Tuscan sequence
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