6,057 research outputs found
Dietary supplementation of Yerba Mate (Ilex paraguariensis) during the dry period improves redox balance in lactating dairy cows
No full textThirty-six pregnant Holstein–Friesian cows were used to study the effect of Yerba Mate (YM) supplementation during the dry period on redox balance. The treatments groups were Control (no YM), YM 250 (250 g/cow/day), and YM 500 (500 g/cow/day). Blood samples were obtained 30 days prepartum, at calving, and monthly postpartum until four months post calving. Liveweight (LW) and body condition score (BCS) were assessed prepartum, at calving, and then postpartum monthly until the end of the trial. Plasma was analyzed for hydroperoxides (d-ROMs), advanced oxidation protein products (AOPP), and biological antioxidant potential (BAP). The oxidative stress index (OSI) was calculated as OSI = ROMs/BAP 100. Cows were milked twice daily, and milk yield data were recorded daily. Redox balance was improved by YM supplementation, as reflected in the lower OSI values observed in the YM groups. Yerba Mate supplementation significantly affected LW, but did not affect BCS. Milk yield averaged 28.1 0.40, 29.0 0.48, and 29.9 0.46 L/cow/day in the Control, YM 250, and YM 500 groups, respectively, but was not significant. Nutritional manipulation during the dry period with Yerba Mate has demonstrated the potential to improve redox balance and milk yiel
Preventive effects of bovine colostrum supplementation in TNBS-induced colitis in mice
No full textInflammatory bowel disease (IBD) is a chronic inflammatory disorder for which the current medical therapy is not completely effective. Bovine colostrum (BC) is a biological fluid rich in bioactive molecules that may have beneficial effects on several gastrointestinal disorders. The objectives of this study were to assess the preventive effects of BC supplementation in a mouse model of 2,4,6 trinitrobenzene sulfonic acid (TNBS)-induced colitis using a multidisciplinary approach. Specifically, the following parameters were evaluated: (i) disease activity index (DAI), (ii) histological score, (iii) expression levels of TLR4, anti- and pro-inflammatory cytokines, and (iv) count of some bacterial species of the intestinal microbiota. Mice received a daily suspension of BC (BC group, n = 12) or saline solution (control, CN group, n = 12) for 21 days before the intrarectal inoculation with 1% of TNBS solution. BC was well tolerated and did not induce any histological damage or clinical symptoms. After TNBS treatment, BC group showed a reduction of body weight (BW) loss (PE. coli and Enterococci increased (P</div
Advances in design and construction of leaf wetness sensors
No full textThe majority of fungal infections are caused by leaf wetness, due to excessive humidity, mist, rain or irrigation. Leaf wetness duration (LWD), the total number of hours per day in which water is present on the foliage, can be monitored through a leaf wetness sensor (LWS). In this paper, an innovative procedure to manufacture a precise, low power and low cost electronic sensor is proposed to provide a tool for agronomic exploitation. The measurement subsystem consists of a two-side capacitive leaf wetness sensor, where a water presence varies the dielectric constant of the surrounding medium. The data acquisition subsystem exploits a capacitance-to-digital converter. Experimental results in controlled and real environments confirm reliability
Goji berries supplementation improves productive performance of rabbit
No full textThe aim of our study was to evaluate the effects of Goji berries on the productive performance of rabbits. One month before insemination, the New Zealand White does (20 animals/group) were fed a commercial standard diet (group C), supplemented with 1% or 3% Goji (groups 1G and 3G, respectively). After weaning, 50 rabbits/group were randomly selected and fed with the same diet of mothers (C, 1G or 3G) up to 91 days of age. 1G group showed lower pre-weaning mortality (31%, 15%, and 29% for C, 1G and 3G, respectively; P < 0.05), higher litter size (5 ± 1, 7 ± 1, and 6 ± 1 rabbits for C, 1G and 3G, respectively; P < 0.05) and litter weight (1278 ± 72, 1541 ± 61, 1319 ± 61 g for C, 1G and 3G, respectively; P < 0.05) at day 18, and higher litter size at weaning (4 ± 1, 6 ± 1, 4 ± 1 rabbits for C, 1G and 3G, respectively; P = 0.05) than C group. The supplemented groups showed higher body weight at the slaughter (2072 ± 32 g, 2212 ± 28 g and 2313 ± 32 g for C, 1G and 3G, respectively; P < 0.01) than C. Our results show that a supplementation of feed with Goji berries results in an improvement of productive performance in rabbit
Design and implementation of a capacitive leaf wetness sensor based on capacitance to digital conversion
No full textAn innovative implementation of an electronic leaf wetness sensor (LWS) is proposed. It utilizes capacitive sensing, combined with an innovative data acquisition method, which implements a capacitance-to-digital converter. The study explores the design procedure of a capacitive LWS, proposing an analytical approach and emphasizing low manufacturing costs. Since the LWS is intended for Internet of Things (IoT) applications, the paper estimates its energy consumption, introducing a boost regulator to optimize power usage, contributing to extend the battery life. The study presents simulation results and experimental validations, including an ad-hoc calibration procedure in controlled conditions. The sensors were tested in real agricultural environments over a complete vegetative season, demonstrating their capability to operate continuously without problems
Encuentros con Elena Poniatowska
No full textThe author analyzes testimonial literature from the perspective of female literature through his meeting with Elena Poniatowska. An analysis of reality vs. Fiction in Elena, Jesusa and Tinisima.El autor analiza, desde su encuentro con Elena Poniatowska, la vertiente de la literatura testimonial como literatura de mujeres. Un análisis interior de la relación entre realidad y ficción, entre Elena, Jesusa o Tinísima
Bio-bibliografía de y sobre Elena Poniatowska Amor
No full textThe objective of this article is to collect and present: I. the chronology of the life and work of Elena Poniatowska; II. the complete works (as principal and secondary author), and III. the bibliography on the author (books, chapters, and articles).El objetivo de este artículo es reunir y presentar: I. los datos cronológicos fundamentales de la vida y la obra de Elena Poniatowska; II. El compendio de sus obras (como autora principal y como secundaria); y III. la bibliografía sobre la escritora (libros, capítulos de libros y artículos)
El Tlacuache Núm. 698 (2015). 698 Año 13 (2015) noviembre. El Tlacuache
No full textLa mujer vista por cronistas en tiempos novohispanos por Laura Elena Hinojosa. - El Códice Mauricio de la Arena forma parte de Los códices de Tlaquiltenango por Laura Elena Hinojosa
La questione semiologica dell’a-venire nel rapporto di Derrida con la filosofia hegeliana
No full textThis text analyses the relation between Derrida’s thought and Hegel’s philosophy
between 1965 and 1970. The author focuses on the connection between
Aufhebung and différance to show how, through this connection, Derrida
is able to conceive the “to-come” as dissemination. What this text tries to
demonstrate is that thanks to the relation with Hegel’s thought, the question
of the “to-come” becomes in Derrida a semiological question linked with the
problem of writing
Energy-Efficient Wireless Multimedia Sensor Nodes for Plant Proximal Monitoring
No full textThe paper presents a double-radio wireless multimedia sensor node (WMSN) with a camera on board, designed for plant proximal monitoring. Camera sensor nodes represent an effective solution to monitor the crop at the leaf or fruit scale, with details that cannot be retrieved with the same precision through satellites or unnamed aerial vehicles (UAVs). From the technological point of view, WMSNs are characterized by very different requirements, compared to standard wireless sensor nodes; in particular, the network data rate results in higher energy consumption and incompatibility with the usage of battery-powered devices. Avoiding energy harvesters allows for device miniaturization and, consequently, application flexibility, even for small plants. To do this, the proposed node has been implemented with two radios, with different roles. A GPRS modem has been exclusively implemented for image transmission, while all other tasks, including node monitoring and camera control, are performed by a LoRaWAN class A end-node that connects every 10 min. Via the LoRaWAN downlink, it is possible to efficiently control the camera settings; the shooting times and periodicity, according to weather conditions; the eventual farming operations; the crop growth stages and the season. The node energy consumption has been verified in the laboratory and in the field, showing that it is possible to acquire one picture per day for more than eight months without any energy harvester, opening up further possible implementations for disease detection and production optimization
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