Search results for "reserva"
showing 10 items of 630 documents
PROTEZIONE E MIGLIORAMENTO DELLE PRESTAZIONI ANTINCENDIO NEI TEATRI ALL’ITALIANA. FIRE PROTECTION AND PERFORMANCE UPGRADE IN ITALIAN STYLE THEATRES
2018
Se storicamente gli incendi sono stati la causa principale di distruzione di molti teatri all’italiana, ancora in un recente passato interventi di conservazione, restauro e adeguamento alle norme antincendio, in alcuni casi incolti e irrispettosi, ne hanno stravolto gli elementi architettonico-costruttivi caratterizzanti. Come per ogni edificio storico, ancor più nei Teatri, in cui l’effimero connota molte parti della costruzione, è necessario garantire oltre alla salvaguardia delle vite umane, la protezione dell’edificio e del suo valore intrinseco. Il processo per raggiungere livelli adeguati di prestazioni e sicurezza antincendio pone pertanto molte sfide per i legislatori, i progettisti…
Optimal growth and land preservation
1997
A model of optimal economic growth with a constant population subject to a constraint on the availability of land is presented. It takes account of the dual character of land as a production factor and as a consumption good (environmental amenities) by determining the optimal intertemporal allocation of land between productive and recreational uses. An extension of the analysis for the case of a growing population with endogenous growth based on human capital accumulation shows that if the rate of discount is not very low then there exists a set of balanced growth paths compatible with a constant allocation of land. En este trabajo se presenta un modelo de crecimiento económico óptimo con u…
Urban property and revenues between the 10th and 11th century: the case of Chartres
2011
The author continues a discussion already published in "Mediterranea - ricerche storiche" (no. 18, 2010, p. 13- 32), examining a number 10th - 11th century concessions ad firmam in Chartres; in this period the territory was caught between the pressures of the Normans and the influence of the Capetians. The use of these contracts in such a well-defined geographic and socio-economic area enables us to resume examination of a subject which was first seriously investigated in the late nineteenth century by Guillaume Des Marez in relation to the city of Ghent, and then formulates observations about the relationship between urban development, the institutional profile of property, forms of domina…
Fertility and breast cancer: A literature review of counseling, preservation options and outcomes.
2021
Fertility preservation is an important issue in breast cancer patients undergoing oncological treatment. Fertility counseling is a crucial need given the physical and psychological stress experienced by patients. Cryopreservation of mature oocytes is currently the standard fertility-preserving procedure. Other options such as ovarian tissue preservation or gonadal protection during chemotherapy are still experimental, but have proven effectiveness. Prompt referral to a fertility unit is highly recommended in order to ensure quality of care. In this article, we focus on the different strategies to preserve fertility in breast cancer patients, assessing also the safety of pregnancy and breast…
Comparative morphology of the postpharyngeal gland in the Philanthinae (Hymenoptera, Crabronidae) and the evolution of an antimicrobial brood protect…
2015
Background Hymenoptera that mass-provision their offspring have evolved elaborate antimicrobial strategies to ward off fungal infestation of the highly nutritive larval food. Females of the Afro-European Philanthus triangulum and the South American Trachypus elongatus (Crabronidae, Philanthinae) embalm their prey, paralyzed bees, with a secretion from a complex postpharyngeal gland (PPG). This coating consists of mainly unsaturated hydrocarbons and reduces water accumulation on the prey’s surface, thus rendering it unfavorable for fungal growth. Here we (1) investigated whether a North American Philanthus species also employs prey embalming and (2) assessed the occurrence and morphology of …
Volumetric changes in alveolar ridge preservation with a compromised buccal wall: a systematic review and meta-analysis.
2020
Background Many studies have addressed socket preservation, though fewer publications considering buccal wall loss can be found, since the literature typically considers sockets with four walls. A systematic review was made on the influence of type II buccal bone defects, according to Elian’s Classification, in socket grafting materials upon volumetric changes in width and height. Material and Methods An electronic and manual literature search was conducted in accordance to PRISMA statement. The search strategy was restricted to randomized controlled trials (RCTs) and controlled clinical trials (CCTs) describing post-extraction sockets with loss of buccal wall in which alveolar ridge preser…
Cell inactivation and membrane damage after long-term treatments at sub-zero temperature in the supercooled and frozen states.
2008
The survival of cells subjected to cooling at sub-zero temperature is of paramount concern in cryobiology. The susceptibility of cells to cryopreservation processes, especially freeze-thawing, stimulated considerable interest in better understanding the mechanisms leading to cell injury and inactivation. In this study, we assessed the viability of cells subjected to cold stress, through long-term supercooling experiments, versus freeze-thawing stress. The viability of Escherichia coli, Saccharomyces cerevisiae, and leukemia cells were assessed over time. Supercooled conditions were maintained for 71 days at -10 degrees C, and for 4 h at -15 degrees C, and -20 degrees C, without additives or…
Cui prodest servāre? Due ipotesi di destinazione per gli embrioni crioconservati
2022
The essay analyses the general ban for the donation of embryos placed into cryopreservation, stated by the Italian legislation n. 40/2004. Such a prevision causes a sine die conservation not only for embryos suitable for implantation, but also for those affected by genetic defects or diseases. The essay points out that donating both types of embryos, respectively, to adoption or to scientific fertility research preserves the dignity of the cells in storage, as a will supported by the consent of both gametes’ providers to the ultimate scope of solidarity.
Zygotic and nucellar embryo survival following dehydration and cryopreservation of citrus intact seeds.
2004
A cryopreservation procedure by dehydration and direct immersion in liquid nitrogen was developed for seeds of four polyembryonic Citrus species, and the sexual or nucellar origin of the recovered seedlings was investigated. Seeds of three species could be desiccated in a sterile air flow to 16 percent (C. sinensis) or 10 percent (C. aurantium and C. limon) moisture content with a negligible reduction in germination levels. Differently, the germinability of C. deliciosa seeds dropped to 50 percent after drying to 15 percent moisture content. Following dehydration treatments, a reduction in the average number of seedlings per germinated seed was always observed. However, all four species ben…
Ovarian tissue cryopreservation and transplantation in menopause: new perspective of therapy in postmenopausal women and the importance of ethical an…
2023
Menopausal transition entails a progressive decrease in hormone production by the ovaries that lead to important physical and psychological changes that could significantly affect quality of life. Hormone replacement therapy (HRT) administered from the onset of menopausal symptoms usually improves quality of life and life expectancy. Nevertheless, it is not risk-free. Ovarian tissue cryopreservation (OTC) has been investigated as a potential new strategy for delaying menopause and/or to avoid HRT. This review analyzes the critical points of HRT to assess whether OTC and subsequent reimplantation can affect postmenopausal management. We assessed available randomized clinical trials in PubMed…