93 research outputs found
Effect of sex-linked feathering genes on grow-out performance of Baladi chickens
No full textEight hundred late and early feathering Saudi Arabian Baladi chicks were used to assess the effect of feathering genotype on grow out performance. 400 Leghorn chicks were also used in this study for comparison. The chicks in each genotypic group were wing banded, individually weighed and randomly alloted to 4 electrically heated battery, four replicates in each, to 3 weeks of age, thereafter moved to floor pens in an environmentally controlled house. At six weeks of age, sex was phenotypically determined and four replicates of 40 birds of each sex were grown separately. All chiks were subjected to conventional management practices. Early feathering Baladi significantly(P "" .05) out weighed their late feathering counterparts only at 6 weeks of age where as Leghorn had higher (P "" .05)body weight than Baladi at all ages studied. Early feathering Baladi had significantly(P "" .05) higher body weight gain at 1-6, growth rate at 1-6 and 1-20 weeks of age and lower feed intake at the first two age periods compared with late feathering Baladi. Leghorn had significantly (P<.05) the highest body weight gain and the lowest growth rate for most of the age periods studied and the highest feed intake at 1-6 and the best feed efficiency at 6-16 weeks of age. Males in general showed significantly (P<.05) better performance than females with regard to all studied parameters.Corresponding Author:
Dr. Abdullah Ali ALSobayel
Professor of Poultry breeding and production, Animal Production Department, College of Food Sciences and Agriculture, PO Box 86278 Riyadh 11622, Kingdom of Saudi Arabia
Email: [email protected]
Capture of volatile iodine by newly prepared and characterized non-porous [CuI]n-based coordination polymers
No full textFour new non-porous CuI-coordination polymers [Cu-2(mu(3)-I)(2)(mu-bpb)](n) (1a), [Cu(mu(2)-I)(mu-bpb)](n) (1b), [Cu-4(mu(2)-I)(4)(mu-bpmb)(4)](n) (2), and [CuI(mu-bdb)](n) (3) (bpb = 1,4-bis(pyrazolyl) butane; bpmb = 1,4-bis[(pyrazolyl)methyl]benzene; bdb = 1,4-bis[(3,5-dimethylpyrazolyl)methyl] benzene) have been successfully prepared and their structures fully characterized by single-crystal X-ray diffraction, FT-IR spectroscopy, PXRD and elemental analysis. Crystallographic investigation revealed that 1a, 1b, and 2 exhibit two-dimensional (2D) structures; in 1a parallel [Cu2I2](n) staircase motifs are cross-linked into two-dimensional sheets by bpb linkers with a fully extended conformation, while in the structures of 1b and 2 Cu2I2 rhomboid dimers are linked by bpb and pbmb ligands, respectively, into two-dimensional sheets with a 4(4)-sql net. Differently, compound 3 shows a one-dimensional (1D) zigzag chain structure with monomeric CuI units. All the four non-porous coordination polymers show the ability to capture volatile iodine in the gas phase. The solid-state photoluminescence properties of 1a, 1b, and 2 have also been investigated. The iodine-adsorbed samples 1a-I-2, 1b-I-2, and 2-I-2 show no fluorescence behavior
Three Cationic: Nonporous CuI-Coordination Polymers: Structural Investigation and Vapor Iodine Capture
No full textThree cationic nonporous copper(I) coordination polymers containing bis-pyrazolyl flexible ligands have been prepared and characterized, namely, [Cu(μ-bdb)1.5](PF6)n (1), [Cu(μ-bpb)2](PF6)n (2), and [Cu(μ-bpmb)2](PF6)n (3) (bdb = 1,4-bis(3,5-dimethylpyrazolyl) methyl)benzene; bpb = 1,4-bis(pyrazolyl)butane; bpmb = 1,4-bis(pyrazolyl)methyl)benzene). All compounds were characterized by infrared, powder X-ray diffraction, elemental and thermal analyses, and single-crystal X-ray diffraction. Compound 1, with methyl-substituted pyrazolyl ligand, forms a chain of alternating rings and ribbons in which the copper(I) centers are three coordinated in distorted trigonal planar geometry. In compounds 2 and 3 copper(I) atoms adopt distorted tetrahedral geometries giving two-dimensional sheet structures with 44-sql topology. Interestingly, iodine sorption experiments show that colorless crystals of 2 and 3 remain unchanged in the presence of iodine vapors, while the three-coordinated compound 1 immediately absorbs iodine and turns dark. Anion exchange behavior of compounds 1 and 2 was also investigated both in solution and in the solid state
Egyptian Baladi, Australian Style in Lockdown: Seeking Connection
No full textThis article is an autoethnographic account of a participatory action research project conducted in Australia during COVID-19 lockdown. The research explores the potential for asynchronous multitracking performance to facilitate social connection and intercultural understanding, drawing on the knowledge of six arts practitioners. The account is written by an Indonesian-Australian researcher and dance practitioner engaged in raqs sharqi (Arabic term for belly dance). Through the process of collaborating on a performance of ashra baladi, an improvisational form of Egyptian music and dance, issues emerged requiring consideration including how to respectfully navigate intercultural music engagement, the barriers and opportunities for intercultural understanding presented by digital platforms, music and dance, and how to navigate cultural identity in a super-diverse world. Taking a phenomenological perspective, autoethnography provides an appropriate method to critically reflect on these personal and cultural questions. The author offers insights from her lived experience, her exploration of various philosophies about cultural exchange, and her involvement in a community of practice engaged in intercultural musicking
Far-Field Magnification of Subdiffraction Conducting Features Using Metamaterial-Lined Aperture Arrays
No full text
Egyptian Baladi, Australian Style in Lockdown: Seeking Connection
No full textThis article is an autoethnographic account of a participatory action research project conducted in Australia during COVID-19 lockdown. The research explores the potential for asynchronous multitracking performance to facilitate social connection and intercultural understanding, drawing on the knowledge of six arts practitioners. The account is written by an Indonesian-Australian researcher and dance practitioner engaged in raqs sharqi (Arabic term for belly dance). Through the process of collaborating on a performance of ashra baladi, an improvisational form of Egyptian music and dance, issues emerged requiring consideration including how to respectfully navigate intercultural music engagement, the barriers and opportunities for intercultural understanding presented by digital platforms, music and dance, and how to navigate cultural identity in a super-diverse world. Taking a phenomenological perspective, autoethnography provides an appropriate method to critically reflect on these personal and cultural questions. The author offers insights from her lived experience, her exploration of various philosophies about cultural exchange, and her involvement in a community of practice engaged in intercultural musicking
Far-field high-resolution imaging of conducting obstacles using metamaterial-lined aperture arrays
No full textRéponses adaptatives à l'échelle de la lactation de la chèvre Baladi alimentée sur parcours
No full textUn erratum est paru dans Small Ruminant Research 2011, 96 (2) : 217. The author regrets that during the publication of this paper an error occurred within a reference. In Section 4, paragraph 1 the reference Chilliard et al., 1999 should have read Chilliard et al., 2000.International audienceTwo diets were tested on Baladi lactating goats during mid-lactation in order to determine their adaptive capacities facing feed restrictions: a low nutritive value pasture (LP) and a high nutritive value pasture (HP). During early lactation on natural pastures, goats’ body condition (BCS) degraded, as initially fat goats lost more weight (BW) and were subject to a greater body reserves mobilization (BCS and NEFA) than lean ones. An intense compensation for all goats followed their transfer to the HP whereas the mobilization continued in LP, but only for fat goats. The lean goats managed to maintain their body condition by increasing their feed intake. When moved to mixed agricultural pastures at late lactation, all goats showed a full reconstitution of body reserves, particularly intense for those coming from LP, showing their strong capacities to recover their body reserves at this period. In parallel, milk production decreased for all goats on natural pastures, as the milk fat and milk proteins content. After transfer to HP, the high lactation rebound (+36%) showed the good reactivity of the Baladi goat in response to a feed improvement. Another rebound appeared in groups coming from LP after being transferred to a better feeding condition. However, during the reproduction phase, the milk yields decrease showing the highest priority given to the body reserves recovery
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