2,266 research outputs found
Attia Mulsula T. f. e «Tarquitia Mulsula»: nota su un ghost name dell’instrumentum inscriptum.
No full textIl contributo esamina alcuni esemplari di laterizi bollati del territorio emiliano, tradizionalmente considerati come la produzione di una "Tarquitia Mulsula" e si constata che si tratta invece di esemplari del marchio di Attia Mulsula T. f. già noto nella Regio X
Effect of water restriction on growth performance, feed nutrient digestibility, carcass and meat traits of rabbits.
No full textThe study investigates the effects of a post-weaning water restriction on performance, nutrient digestibility, carcass traits and meat quality of 84-day-old rabbits. A total of 1388 weaned rabbits (35 days) were randomly divided into two groups on the basis of BW and sex. The two groups were fed the same diets ad libitum both in the post-weaning (35 to 60 days) and fattening (61 to 84 days) periods. In the post-weaning period, one group (AL) also received drinking water ad libitum, whereas the other (WR) had a water restriction from 35 to 41 days 2 h/day; from 42 to 48 days 2.5 h/day; from 49 to 55 days 3 h/day; and from 56 to 60 days 4 h/day. During the fattening period, both groups had water-free access. Individual live weights and feed intake per cage were recorded weekly for 32 cages randomly chosen per group (64 rabbits) to calculate the BW gain, feed intake and feed conversion ratio (FCR). The apparent digestibility values of nutrients were measured using acid-insoluble ash. Carcass data were collected from 16 rabbits (8 males and 8 females) per group selected for similar final BW in both groups. Mortality from 35 to 60 days was higher in the AL group (10.1% v. 5.2%, for AL and WR, respectively, P < 0.0001). BW gain was higher for the AL group during both the post-weaning (+22.4%, P < 0.01) and the entire period (+7.5%, P < 0.05). Water restriction reduced feed intake both in the post-weaning (-17.4%, P < 0.0001) and in the entire period (-9.9%, P < 0.05). During the fattening period, FCR was lower for the WR group (5.15 v. 5.75 g/g, for WR and AL, respectively, P < 0.05). The apparent digestibilities of dry matter, organic matter, NDF, ADF and cellulose were greater in the restricted rabbits (+4.7%, +4.5%, +10.2%, +18.8% and +12.8%, P < 0.01, P < 0.01, P < 0.05, P < 0.01, P < 0.05, respectively). Perirenal and scapular fat percentages were higher in the AL rabbits (+30.7% and +116.6%, P < 0.01 and P < 0.001, respectively). Water restriction increased saturated fatty acids (C16:0, +12.9%, P < 0.05), lauroleic acid (C12:1, +75.0%, P < 0.01), n-3 polyunsaturated fatty acids (C20:5, +50.0%, P < 0.01 and C22:5, +16.6%, P < 0.05) and the n-3/n-6 ratio (+28.6%, P < 0.05). The applied water restriction between 35 and 60 days executed during the winter months improved the digestive health of rabbits, with no negative effects on carcass traits, or physical and chemical meat characteristics. However, from the animal welfare point of view, a water restriction can be criticized as a method to restrict feed intake. RI Attia, Youssef/I-7231-2013 OI Attia, Youssef/0000-0001-6505-324
Fabrication of ceramic micro-scale hollow components by micro-powder injection moulding
No full textRapid developments in microsystem technologies demand ceramic microcomponents of
increasing geometrical complexity. State-of-the-art microfabrication routes of
ceramics are either limited in geometrical complexity and/or high volume
capabilities. This paper presents a process route by which ceramic
microcomponents with relatively complex three-dimensional architectures could be
realised by a high-volume technique. The proposed strategy, in which yttria-
stabilised zirconia was implemented, combines the capabilities of insert-
micromoulding, powder micro-overmoulding, catalytic debinding and sintering. The
produced architectures demonstrate the capability of the technique to combine
the high performance of ceramic materials with the dimensional accuracy and mass
manufacturability of powder micromoulding
Reducing ammonia emission by aluminum sulfate addition in litter and its influence on productive, reproductive, and physiological parameters of dual-purpose breeding hens
No full textThis research investigated the impact of aluminum sulfate (AS) as amendment to different types of litter (new, reused, and mixed litters) for reducing ammonia emission and improving productive performance of local dual-purpose breeding hens. A total of 450 hens and 60 cocks from the Inshas strain were randomly assigned to six groups (five replicates each of 15 hens + 2 cocks) raised in pen floor furnished with a wheat straw litter. The groups included: (1) new, (2) reused, (3) mixed (50% new + 50% reused) litter; the other groups (4, 5 and 6) were respectively housed on the same litter as groups 1, 2 and 3 but with the addition of 495 g of AS/m2 litter. The feed conversion ratio was better for layers raised on new litter with or without AS than other groups. Different kinds of litter had different moisture (p < 0.05) and pH (p < 0.05) values. Birds raised on litter types treated with AS significantly (p < 0.05) decreased intestinal pH and decreased total bacterial count compared to the same litter types without AS at the end of the experiment. Birds raised on new litter supplemented with AS had the highest plasma T3, total protein, globulin, Hgb, and PCV% and the lowest levels of uric acid and cholesterol at the end of the experimental period. Therefore, litter amendment with AS, also the mixed or reused one, could be recommended to reduce ammonia and, in turn, increasing plasma T3 and decreasing total bacterial count, leading to increasing bird’s performance
sj-pdf-1-jit-10.1177_15280837221098197 – Supplemental Material for Fabrication of cost-effective double layers composite for efficient sound-absorbing based on sustainable and flame-retardant jute fabrics
No full textSupplemental Material, sj-pdf-1-jit-10.1177_15280837221098197 for Fabrication of cost-effective double layers composite for efficient sound-absorbing based on sustainable and flame-retardant jute fabrics by Tarek M El-Basheer, Amal A El Ebissy and Nour F Attia in Journal of Industrial Textiles</p
A note on the expected discounted cost of operating a finite dam
No full textA finite dam operated under the PM[lambda],[tau] policy (Attia, 1987; Lam and Lou, 1987) is considered. The input process to the dam is either (a) the integral of an irreducible Markov chain or (b) the geometric Wiener process exp{B(t)}, where B(t) is a Wiener process with drift [mu] > 0 and variance parameter [sigma]2. The expected discounted cost of operating the dam in the two cases (a) and (b) is obtained, and the relation between this cost and the long-run average cost per unit time is established.expected discounted cost finite dam integral of a Markov chain geometric Wiener process
WATER STRESS IN TANNAT AND DURAS GRAPEVINE CULTIVARS (VITIS VINIFERA L.): LEAF PHOTOSYNTHESIS AND GRAPE PHENOLIC MATURITY
No full textOur study focuses on the physiological responses and berries phenolic maturity
of Tannat and Duras red wine grape cultivars, which are autochthonous from
the southern France, under water stress condition from pre-véraison to harvest
by limiting water availability to 30% of the control well-watered. Methode and
result : Predawn and midday leaf water potentials served as an indicator to
maintain water stress level compared to the control. The seasonal reduction of
leaf net assimilation rate under saturating irradiance (An) under water stress
over six weeks stress period versus well-watered was 60% for Tannat and
Duras as compared to 64 and 46% for leaf stomatal conductance (gs) for Tannat
and Duras cultivars respectively. These responses qualify Tannat as a good
candidate for adapting to limited water availability. For both Tannat and Duras
cultivars, relationships between the fresh mass, skin and flesh in six different
berry size categories, ranged from about 0.5 to 2.0 g, were assessed on ripe
fruit from grapevines subjected to well-watered and water stressed treatments.
Fresh mass components for both treatments varied significantly depending on
the grape cultivar and water availability. Tannat showed that seed represented
around 6%, skin around 12%, and flesh about 82% of the berry total fresh
weight. The Duras cultivar showed that seed represented around 3%, skin
around 12% and flesh around 85%. Exact proportion of seed, skin and flesh
varied according to berry size category. There was an increase in total seed
mass per berry to water stress treatment. Anthocyanin content and the seed
tannin concentration varied depending on the grape variety and water stress
treatment. In comparison with skin tannin or anthocyanin content, seed tannin
varied more with berry size and less with vine water status. Tannat variety
showed a positive effect of water stress on anthocyanin content but not Duras.
At last, seed and skin tannin concentrations decreased with berry fresh weight
Figure 1 in Complementary description of Kuzinellus niloticus (El-Badry) (Acari, Mesostigmata) from Egypt
No full textFigure 1 Kuzinellus niloticus (El-Badry, 1967) adult female. a – Chelicera, b – Dorsal shield, c – Posterior part of idiosoma showing the poroids (idx, idm4, idm5 andidm6) and the solenostomes (gd8andgd9), d – Ventral shields, e – Spermatheca, f – Genu, tibia and basitarsus of leg IV.Published as part of Abo-Shnaf, Reham & Attia, Sahar Ali, 2022, Complementary description of Kuzinellus niloticus (El-Badry) (Acari, Mesostigmata) from Egypt, pp. 143-147 in Acarologia 62 (1) on page 145, DOI: 10.24349/rqg5-jj0i, http://zenodo.org/record/716016
Flatness optimization of micro-injection moulded parts: the case of a PMMA microfluidic component
No full textMicro-injection moulding (µ-IM) has attracted a lot of interest because of its potential for the production of low-cost, miniaturized parts in high-volume. Applications of this technology are, amongst others, microfluidic components for lab-on-a-chip devices and micro-optical components. In both cases, the control of the part flatness is a key aspect to maintaining the component's functionality. The objective of this work is to determine the factors affecting the flatness of a polymer part manufactured by µ-IM and to control the manufacturing process with the aim of minimizing the in-process part deformation. As a case study, a PMMA microfluidic substrate with overall dimensions of 10 mm diameter and 1 mm thickness was investigated by designing a µ-IM experiment having flatness as the experimental response. The part flatness was measured using a micro-coordinate measuring machine. Finite elements analysis was also carried out to study the optimal ejection pin configuration. The results of this work show that the control of the µ-IM process conditions can improve the flatness of the polymer part up to about 15 µm. Part flatness as low as 4 µm can be achieved by modifying the design of the ejection system according to suggested guideline
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