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11.
Air permeability is one of the most important utility properties of textile materials as it influences air flow through textile material. Air permeability plays a significant role in well-being due to its influence on physiological comfort. The air permeability of textile materials depends on their porosity. There are a lot of structural properties of textile materials also operating parameters (knitting+finishing) influencing air permeability and there are also statistically significant interactions between the main factors influencing the air permeability of knitted fabrics made from pure yarn cotton (cellulose) and viscose (regenerated cellulose) fibers and plated knitted with elasthane (Lycra) fibers. Two types of artificial neural networks (ANNs) model have been set up before modeling procedure by utilizing multilayer feed forward neural networks, which take into account the generality and the specificity of the product families respectively. A virtual leave one out approach dealing with over fitting phenomenon and allowing the selection of the optimal neural network architecture was used. Moreover this study exhibited that air permeability could be predicted with high accuracy for stretch plain knitted fabrics treated with different finishing processes. Within the framework of the work presented, ANNs were applied to help industry to adjust the operating parameter before the actual manufacturing to reach the desired air permeability and satisfy their consumers. 相似文献
12.
Osama M El-Husseiny Galal El Din M Abdul-Aziz & Rania S Mabroke 《Aquaculture Research》2008,39(3):291-300
Reducing feed cost has been a major issue in fish nutrition. Mixed protein schedules have been proposed as one of the methods successfully tested in many fish species to reduce feed cost. Meanwhile, the effect of dietary choline and betaine supplementation on fish performance was assessed. The aim of the present study was to investigate the effect of mixed protein schedules, combined with choline and betaine, on Nile tilapia performance. This experiment was conducted in a (4 × 3) factorial arrangement of treatments. Four mixed protein schedules were examined, in the presence of choline 0.3% and/or betaine 0.5%. The four mixed protein schedules were achieved by alternating diet (A; 31%CP) and diet (B; 24%CP) as follows: (6 days‐A), (5 days‐A/1 day‐B), (4 days‐A/2 days‐B) and (3 days‐A/3 days‐B). The results indicated that in the presence of betaine 0.5% and choline 0.3%, the optimal mixed protein schedule for tilapia was (3A/3B). Fish fed on the 4A/2B or 3A/3B schedules utilized protein more efficiently than fish fed on the (6A) schedule. Fish fed diets supplemented with betaine (b) only showed the highest energy retention. The lowest feed cost was recorded for fish fed on (3A/3B) in the presence of betaine 0.5% and choline 0.3% in fish diet. 相似文献
13.
Rania Jbir Néjib Hasnaoui Messaoud Mars Mohamed Marrakchi Mokhtar Trifi 《Scientia Horticulturae》2008
The amplified fragment length polymorphism (AFLP) analysis of DNA was used to characterize 34 pomegranate cultivars. By using a combination of six primers, a total of 327 markers were scored with a mean of 57.5. The high percentage of polymorphic bands (ppb) of 94.7 and the resolving power (Rp) collective rate value of 129.14 were scored. Data proved that the tested primers were informative to discriminate among cultivars and to survey the genetic diversity in this fruit crop. It has been assumed that the local pomegranate germplasm is characterized by a typically continuous genetic diversity. The derived dendrogram proved that cultivars are clustered independently from their geographical origin and their denomination. In addition, AFLP permitted the generation of a nearly unlimited number of molecular markers that are reliable in differentiating the cultivars and/or the polyclonal varieties. 相似文献
14.
Amr Abd El‐Wahab Rania E. Mahmoud Marwa F. E. Ahmed Mohamed F. Salama 《Journal of animal physiology and animal nutrition》2019,103(6):1768-1775
The objective of the present study was to evaluate the potential effect of dietary calcium butyrate on growth performance, carcass traits and gut health in Japanese quails. In total, 320 one‐day‐old Japanese quails were randomly assigned to 4 equal treatments, with 8 replicates of 10 Japanese quails, for 4 weeks. The Japanese quails in control treatment were fed control diet whereas in the other treatments the Japanese quails were fed diet supplemented with calcium butyrate at 0.3, 0.5 and 0.7 g/kg diet. Data concerning performance measurements were recorded weekly. In addition, eight Japanese quails (one/replicate) from each treatment were selected randomly for serum collection to measure pro‐ and anti‐inflammatory cytokines. Pooled faecal samples from each replicate of each treatment were also collected at three time points (0, 2 and 4 weeks) for count E. coli and C. perfringens. The results showed that after 7 days of the experimental period, Japanese quails fed calcium butyrate supplemented diet at 0.7 g/kg showed a greater (p < .05) body weight and a favourable (p < .05) feed conversion ratio than the other treatments. Moreover, serum superoxide dismutase and catalase activities were increased (p < .05) in Japanese quails fed calcium butyrate supplemented diet at 0.7 g/kg. Calcium butyrate supplementation at 0.7 g/kg was associated with reduction (p < .05) in TNF‐α, IL‐6 and IL1‐β, while IL‐10 was increased (p < .05). In addition, after 2 weeks of calcium butyrate supplementation, a reduction (p < .05) in E. coli and C. perfringens counts was observed in excreta of Japanese quails fed 0.5 and 0.7 g calcium butyrate/kg diets. It is concluded that calcium butyrate supplementation improves body weight gain, reduces E. coli and C. perfringens counts and has anti‐inflammatory/anti‐oxidant effect in Japanese quails. 相似文献
15.
Rama T. Rashad Mohamed R. El-Zanaty Rania A. El-Bialy 《Communications in Soil Science and Plant Analysis》2020,51(11):1443-1456
ABSTRACT This work aims to study the status of silicon (Si) as a plant nutrient in the soil of Bahtim long-term field experiment in Egypt under the effect of crop rotations system and continuous fertilization. The experiment has been set up since 1912 based on two main factors: (1) crop rotations: mono-cropping (MC), two-year rotation (2Y-R), and three-year rotation (3Y-R), and (2) Fertilization: mineral nitrogen N, phosphorus P, potassium K, and organic farmyard manure FYM. Available N, P, K, and Si in soil were estimated. Productivity of soil was evaluated using Berseem (Trifolium alexndrinum L.) cultivated and harvested in 2019. The plant-available Si (PAS) in soil decreased significantly compared to the control C in case of MC by 70.26%, 2Y-R by 85.09%, and 3Y-R by 92.65% in the direction of N > NP > NPK. Mineral fertilization decreased the PAS significantly by 12.84% N, 29.52% NP, 78.45% NPK compared to the control C in the order of MC > 2Y-R > 3Y-R. Berseem yield (t ha?1) increased significantly compared with the control C following the order C < N < NP < NPK. The most significant increase in the yield was recorded for the NPK treatments by 224.04%, and 200% in case of MC, 2Y-R, 3Y-R, respectively. 相似文献
16.
A growth trial was conducted to evaluate meat and bone meal (MBM) as a source of Phosphorus (P) for Nile tilapia fed with plant-based diets on growth, and the efficiency of P utilization. Four isonitrogenous and isoenergetic diets were formulated. A plant-based diet, deficient in P (0.45 % diet, no P added), was used as the basal diet. Three levels of MBM were substituted for cornstarch in the base diet to produce experimental diets containing MBM0.56, MBM0.67, or MBM0.78% P. These diets were fed (to apparent satiation) to Nile tilapia (initial body weight = 1.53 ± 0.01 g) for eight weeks. Weight gain (WG), specific growth rate (SGR), feed conversion ratio (FCR, feed:gain), whole-body P concentration (WBPC), protein retention (PR), and retained phosphorus (RP) increased significantly (P ≤ 0.05), with the increasing dietary P levels coming from MBM. Diets containing MBM0.78 produced significantly greater WG, SGR, WBPC, PR, and RP compared to other experimental diets (P ≤ 0.05). The linear regression analysis revealed a positive correlation between the WG, WBPC, RP, and dietary P levels coming from MBM of Nile tilapia. These results indicate that MBM has an additional value as a source of P and can serve as a potential source of supplemental P for Nile tilapia fed plant-protein-based diets. 相似文献
17.
18.
Saridomichelakis MN Koutinas AF Farmaki R Leontides LS Kasabalis D 《Veterinary dermatology》2007,18(2):138-141
This study was designed to compare the sensitivity of deep skin scraping, hair plucking, and exudate microscopy for the diagnosis of canine demodicosis. Sixty-seven dogs diagnosed with demodicosis were enrolled in the study. Thirty dogs had localized and 37 had generalized demodicosis. Twenty-seven of the 67 dogs had complicated (secondarily infected) and 40 had noncomplicated form. On each dog, a single lesion was randomly selected to obtain one deep skin scraping, hair plucking, and, when present (n = 13) exudate. For skin scraping and exudate microscopy, an area under a cover slip measuring 2.2 x 2.2 mm was examined, while trichography included the evaluation of 100 hair shafts. At least one parasitic element was found in 85.1% of trichograms, and 100% of exudate preparations. The number of parasitic elements was higher in skin scrapings compared to the other two methods. The diagnostic sensitivity of skin scrapings was higher than that of hair pluckings for the total number of samples (P = 0.002) and for those obtained from dogs with the localized (P = 0.004) and the noncomplicated (P = 0.002) forms of the disease. The diagnostic sensitivity of hair pluckings was higher in generalized and complicated demodicosis compared to the localized and noncomplicated variants. Based on these results, exudate microscopy may be equally sensitive to deep skin scrapings, and trichography may be of value in generalized and complicated demodicosis, although a negative result cannot rule it out. 相似文献
19.
Exposure to xenoestrogens like 4-nonylphenol (NP) is recognized by disrupting endocrine functions and causes reproductive dysfunction in male fish. The present study aimed at investigating the 4-nonylphenol propensity to induce oxidative stress and hormonal disturbances in male catfish and at studying the protective role of quince (Cydonia oblonga). To fulfill this aim, catfish Clarias gariepinus were exposed to pure 100 μg/L 4-NP and to quince the leaf extract added to 4-NP, both for 15 days. The 4-NP exposure induced a marked increase in 17ß-estradiol (E2), LH, and cortisol, while thyroid hormone (TSH, T3), testosterone (T), and FSH levels noticeably decreased; however, 4-NP had no effect on T4 level. Moreover, 4-NP exposure was accompanied by histological impairments in testes. Existence of 4-NP was associated with oxidative damage as evidenced by the significant increase (p < 0.05) of the enzymes, superoxidase dismutase (SOD), catalase (CAT), acetylcholinesterase (AchE), glutathione s-transferase, total antioxidant capacity (TAC), and malondialdehyde (MDA). Adding quince was effective to neutralize hormonal levels and to repair the testicular histological alterations. In response to quince remedy, the enzymes AchE and MDA reduced significantly (p < 0.05), while limited or no response was detected for other tested enzymes. Our results concluded that quince can antagonize 4-NP toxicity in catfish, confirming that quince leaf extract displayed antioxidant activities against the toxicity of hazardous chemicals. 相似文献
20.
Cherif Asma Aissani Rania Aroua Oumayma Bouhadida-Mhadhbi Manel Grissa-Lebdi Kaouthar 《植物病害和植物保护杂志》2020,127(6):905-909
Journal of Plant Diseases and Protection - Gortyna xanthenes (Germar) and Depressaria erinaceella (Staudinger) are key pests of artichoke in Tunisia causing major losses. To this end, a 2-year... 相似文献