Search results for " Reproduction"

The comparative biology of the closely related Senecio nebrodensis and S. viscosus, a narrow endemic and a widespread ruderal

1993

The closely related Senecio nebrodensis, a perennial herb from four mountain ranges in Spain, and S. viscosus, an annual herb widespread in Europe, are being compared by the study of herbarium material and comparative cultivation. In cultivation, S. nebrodensis behaved as an annual, completing its life cycle within a shorter period of time than S. viscosus. The formation of basal leaf rosettes is much more pronounced in S. nebrodensis than in S.viscosus. The main difference between the two species, however, is their breeding system. While S. nebrodensis is self-incompatible, S. viscosus is self-compatible. Differences in reproductive morphology (mainly size and number of ray florets) are su…

’-omics’ technology and human reproduction: reproductomics

2012

The success of assisted reproduction technology is highly dependent on a precise selection of gametes and embryos and determining the best endometrial window for embryo implantation. For many years, morphological criteria have constituted the only way to assess spermatozoon, oocytes, embryos and endometrial samples in order to improve outcomes. However, this approach has reached a ceiling of success and has been related to unacceptably high rates of multiple pregnancies. New technologies have been developed in order to improve the results and reduce risks via better selection of those gametes and embryos with the highest pregnancy potential, and of more favorable endometrial environments fo…

El bordell dels prohoms. El control municipal de la prostitució al Castelló del segle XV

2005

As in other medieval towns, local authorities of Castelló de la Plana controled legal prostitution. Town council supported public brothel in order to dissuade some passions that, otherwise, could degenerate into adultery and violence, and in the lastanalysis into disorders that threaten marriage as guarantee of material and social reproduction of community and its hierarchies. In this paper we analyze moral and politic arguments, places and protagonists of legal prostitution, and repression of transgressor behaviours.<br><br>Com en altres poblacions medievals, les autoritats municipals de Castelló de la Plana regulaven I'exercici legal de la prostitució. El municipi sostenia el …

Transmissió del patrimoni i mercat immobiliari urbà. L’habitatge de les famílies artesanes en la vila d’Alzira durant els segles XIV-XV

2010

[ca] L'artesanat fou un col??lectiu destacat en l'àmbit del conjunt de viles que formaven el País Valencià en la baixa Edat Mitjana, també en el cas d'Alzira. En el següent article tractem d'oferir una anàlisi d'aquest heterogeni grup social mitjançant un dels principals espais on desenvolupava la seua activitat, l'obrador o la casa. I això a partir de la localització de bona part de la menestralia en el centre urbà, també de les tasques que portava a terme en l'àmbit domèstic, passant per la transmissió del patrimoni o en quines condicions accedia al mercat immobiliari. En definitiva, pretenem interrogar-nos sobre com s'inseria l'habitatge en les estratègies familiars i quin paper jugava e…

Plug plant fertilization and planting density affect onion productivity in sicily

2009

The aim of this study was to evaluate the effects of different planting density and different levels of plug plant fertilization on onion production in Sicily. Onion landrace ‘Bisacquino’ was sown in the first week of January 2006 in a unheated greenhouse in polystyrene plug trays. Seedlings were fertigated with the following three different solutions containing (in mg l-1) 800 N - 400 P - 400 K, 1200 N - 600 P - 600 K or 1600 N- 800 P - 800 K. Trays were subirrigated with the nutrient solution both at one leaf stage and 10 days prior transplanting. Plug plants were field transplanted in the Sicilian hilly countryside. The plugs consisting of one, two, or three onion plants were set 20 cm a…

Morphological Characterization of Nordic Horseradish (Armoracia rusticana)

2019

AbstractMorphological diversity was studied in 101 accessions of horseradish (Armoracia rusticana) collected from old gardens in Denmark, Norway, Finland and Sweden. The characterization work was performed over three years, where a total of 19 descriptors from the UPOV guidelines TG/191/2-2001 were recorded each year. The results showed high diversity among the studied accessions, both for leaf and rhizome characters. A morphotype with long leaves and a high leaf length/leaf width quota was the most common, but also elliptic and heart-shaped leaf types were found. Some characters showed stability over the years, although there were variations in the results. Correlations between descriptors…

Precision medicine in human reproduction. Special Issue

2019

The effect of methionine and folic acid administered in ovo on the hematological parameters of chickens (Gallus gallus domesticus)

2020

Abstract Methionine (Met), an essential amino acid in poultry diets, when overdosed may cause hyperhomocysteinemia, which is mainly a trigger for cardiovascular diseases in humans. Homocysteine is neutralized (remethylated) in the presence of folic acid (FA), which also plays an important role in hematopoiesis and participates in the synthesis of DNA, and its deficiencies may result in the development of neural tube defects. One of the basic tools in studying the impact of both xenobiotics and nutrients on the animal organism is hematological analysis. Thus, the aim of this study was to determine the effect of in ovo supplementation with Met and FA on the hematological parameters of broiler…

The future of cladoceran research

1997

The cladocerans are a group of Crustacea used as model organisms in many fields of biology. In system-atics, ecology, physiology and genetics, the cladocerans appear as frequently used examples in case studies. Their reproductive system, switching between parthenogenesis and sexual reproduction, makes them particularly suited for studies dealing with genetic and environmentally induced variability. It is on the whole a particularly handy group of animals that can be used for studying almost all kinds of evolutionary processes.

Multidimensional social capital in new ventures

2013

This paper analyzes and provides empirical evidence on how three different dimensions of social capital (structural, relational, and resources) have a direct causal relation on the performance of financial service start-ups. To this end, a structural equation model is estimated and validated from a database, including information from 142 Argentinean entrepreneurs who answered a questionnaire specifically designed for this research. The main finding of the paper is that the main source of value of social capital for an entrepreneur is the existence of high-quality links. Moreover, the quality of the entrepreneur's links is even more important than their quantity. This conclusion has relevan…