Dyeing of modified acrylic fibers with curcumin and madder natural dyes     

Reda M. El-Shishtawy  G. M. Shokry  Nahed S. E. Ahmed  M. M. Kamel 《Fibers and Polymers》2009,10(5):617-624

Hydrophobic fibers are highly crysta lline and non-polar polymers hence pose a big problem for dyers. Modified acrylic fiber containing different amounts of amidoxime groups as a function of the nitrogen content was obtained and dyed with curcumin and madder natural dyes. The dyeing parameters, such as dye concentration, dye bath pH, salt concentration, temperature, and time and the effect of alum and ferrous sulfate used as mordants were investigated. Compared with the dyeings obtained from modified acrylics, those of blank samples appeared less in color strength values. The color strength was proportional to the nitrogen content of the sample and the maximum value was obtained at pH 2 and pH 5 using madder and curcumin, respectively. The fixation of the dye molecules to the modified acrylic fibers was investigated to show mainly ionic and physical bonds. The washing, perspiration, and rubbing fastness properties for the dyed samples were enhanced by application of alum. The light fastness ratings were also improved using ferrous sulfate especially for the case of the samples dyed with madder.  相似文献   

Understanding veterinary practitioners' decision-making process: implications for veterinary medical education     

Vandeweerd JM  Vandeweerd S  Gustin C  Keesemaecker G  Cambier C  Clegg P  Saegerman C  Reda A  Perrenoud P  Gustin P 《Journal of veterinary medical education》2012,39(2):142-151

Understanding how veterinary practitioners make clinical decisions, and how they use scientific information to inform their decisions, is important to optimize animal care, client satisfaction, and veterinary education. We aimed to develop an understanding of private practitioners' process of decision making. On the basis of a grounded-theory qualitative approach, we conducted a telephone survey and semi-structured face-to-face interviews. We identified a decision-making framework consisting of two possible processes to make decisions, five steps in the management of a clinical case, and three influencing factors. To inform their decision, veterinary surgeons rarely take the evidence-based medicine (EBM) approach. They consult first-opinion colleagues, specialists, laboratories, and the Internet rather than scientific databases and peer-reviewed literature, mainly because of limited time. Most interviewees suggested the development of educational interventions to better develop decision-making skills in veterinary schools. Adequate information and EBM tools are needed to optimize the time spent in query and assessment of scientific information, and practitioners need to be trained in their use.  相似文献   

A quantitative study of the purkinje cells in the cerebellum and the inferior olivary neurons in the chicken     

Rashed R  Imagawa T  Uehara M 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2005,67(12):1261-1263

A single olivocerebellar fiber branches off several climbing fibers. One Purkinje cell receives input from only one climbing fiber. A single inferior olivary neuron, therefore, synapses with several Purkinje cells, so that there are more Purkinje cells than the inferior olivary neurons. We aimed to elucidate the numerical ratio of the inferior olivary neurons to Purkinje cells in the chicken. The total numbers were 353,834 +/- 5,274 in the Purkinje cells per the cerebellum and 21,553 +/- 904 in the inferior olivary neurons of both sides. The numerical ratio of inferior olivary neurons to Purkinje cells was 1:16. The ratio of those neurons in mammals is about 1:4-17, so that the ratio in the chicken is within the range of mammals.  相似文献   

Coli-bacillosis in chicks in Saudi Arabia     

Hashim  Násralla Habiballa  Reda  Ismail M. 《Tropical animal health and production》1980,12(1):15-16

Tropical Animal Health and Production -  相似文献   

The Effect of Air Temperature on Growth and Alkaloidal Yield of Hyoscyamus muticus L.     

F. Reda    A. Raafat    M. A. Abdel-Halim  M. El-Kadi  Z. Yacob 《Journal of Agronomy and Crop Science》1986,157(4):235-244

The effect of natural air temperature on the vegetative growth and alkaloidal yield of H. muticus L. was studied. The highest number of branches, diameter, fresh and dry weights of stem and roots occurred in September sowing at full-flowering and fruiting stages. Relatively higher temperature in Sept. sowing favoured leaf growth (number, area and dry weight). Hyoscyamine yield in different organs of the plants sown in Sept., excessively exceeded all other sowings during flower budding and full-flowering stages. Hyoscine yield was quantitatively very small as compared with that of hyoscyamine and even could not be detected in the leaves of winter sowings during full-flowering stage.  相似文献   

Semen quality of preserved buffalo semen extended in tris extender with processed yolk enriched with strawberry juice (Fragaria spp.)     

El-Nattat  Walid S.  El-Sheshtawy  Reda I. 《Tropical animal health and production》2019,51(5):1267-1271

Tropical Animal Health and Production - Strawberry fruit is rich in natural antioxidants supplemented as a preservative in semen extenders. There is little literature regarding its application in...  相似文献   

Environmental management and biological aspects of the two eriophyoid fig mites Aceria ficus (Cotte) and Rhyncaphytoptus ficifoliae Keifer in Egypt   总被引：1，自引：0，他引：1  

B. A. Abou-Awad  B. M. El-Sawaf  A. S. Reda  A. A. Abdel-Khalek 《Journal of pest science》2000,73(1):5-12

Mites associated with abandoned fig trees in Egypt were observed during a 2-year study. This study included species diversity and seasonal fluctuations as well as some biological aspects of common eriophyoid species. Three phytophagous species consisted of the fig bud mite Aceria ficus (Cotte), the fig leaf mite Rhyncaphytoptus ficifoliae Keifer and the two-spotted spider mite Tetranychus urticae Koch, representing a basic trophic level, were fed upon by three of predacious mites (Pronematus ubiquitus (McGregor), Amblyselus swirskii Athias-Henriot, Agistemus exsertus Gonzalez). Population abundance of the injurious mites were affected by the prevailing climatic conditions, action of predators and leaf age. A control measure of one summer pesticide (abamectin) application throughout the year seemed to be the most successful management of harmful mites. Life table parameters showed that the population of A. ficus multiplied 28.52 times in a generation time of 17.90 days, while R. ficifoliae population increased 16.50 times in a generation time of 14.61 days. Field and laboratory studies indicated that the viviparity is a typical character in the reproduction of R. ficifoliae.  相似文献   

Fish oil replacement by different microalgal products in microdiets for early weaning of gilthead sea bream (Sparus aurata,L.)     

Kamil Mert Eryalçın  Javier Roo  Reda Saleh  Eyad Atalah  Tibiabin Benítez  Monica Betancor  Maria del Carmen Hernandez‐Cruz  Marisol Izquierdo 《Aquaculture Research》2013,44(5):819-828

The aim of this study was to determine if algal products rich in DHA or ARA are able to completely replace fish oil in microdiets for marine fish larvae, gilthead seabream and if extra supplementation with EPA may further enhance larval performance. For that purpose, 20 day‐old gilthead seabream larvae of 5.97 ± 0.4 mm mean total length and 0.12 ± 0.001 mg mean dry body weight were fed with five microdiets tested by triplicate: a control diet based on sardine oil; a diet containing AquaGrow^® DHA (diet DHA) to completely substitute the sardine oil; a diet containing AquaGrow^® ARA (diet ARA); a diet containing both products, AquaGrow^® DHA and AquaGrow^® ARA to completely substitute the fish oil; and, a diet containing both products, AquaGrow^® DHA and AquaGrow^® ARA, together with an EPA source. Temperature, air and salinity activity tests were also performed to detect larval resistance to stress. At the end of the experiment, final survivals did not differ among groups. The microorganism produced DHA was able to completely replace fish oil in weaning diets for gilthead seabream without affecting survival, growth or stress resistance, whereas the inclusion of microorganism produced ARA did not improve larval performance. Moreover, addition of EPA to diets with total replacement of fish oil by microorganism produced DHA and ARA, significantly improved growth in terms of body weight and total length. The results of this study denoted the good nutritional value of microorganisms produced DHA as a replacement of fish oil in weaning diets for gilthead seabream, without a complementary addition of ARA. However, dietary supplementation of EPA seems to be necessary to further promote larval performance.  相似文献   

Incidence of systemic granulomatosis is modulated by the feeding sequence and type of enrichment in meagre (Argyrosomus regius) larvae     

Miguel ngel Ruiz García  Carmen M. Hernndez‐Cruz  Maria Jose Caballero  Hiplito Fernndez‐Palacios  Reda Saleh  Marisol Izquierdo  Mnica Beatriz Betancor Quintana 《Aquaculture Research》2019,50(1):284-295

Systemic granulomatosis is the most frequent disease in juvenile and adult meagre, but studies regarding the first appearance of granulomas in larvae do not exist. In order to evaluate this, meagre larvae were fed four different feeding regimes as follows: RS and RO (rotifer enriched with Easy DHA Selco or Ori‐Green from 3 to 30 dph respectively), RAS and RAO (rotifer enriched with Easy DHA Selco or Ori‐Green from 3 to 21 dph and Artemia enriched with Easy DHA Selco or Ori‐Green from 12 to 30 dph respectively). All treatments were also fed with commercial microdiet from 20 to 30 dph. At 30 dph weight, length, specific growth rate and survival were significantly higher in Artemia‐fed larvae, regardless of the enrichment. Microscopic first appearance of granulomas was observed in 20 dph larvae fed RS and RO. At 30 dph granulomas and thiobarbituric acid reactive substances (TBARS), values were significantly higher in RS and RO‐fed larvae than in RAS and RAO‐fed larvae. The results showed that granulomas first appeared in meagre larvae at 20 dph when fed rotifers only. Conversely, a reduced appearance of granulomas and lipid peroxidation occurs when Artemia is included in the feeding sequence reinforcing the hypothesis of a nutritional origin of the systemic granulomatosis.  相似文献   

Characterization of salt tolerance in tomato plant in terms of photosynthesis and water relations     

Reda Elwany Abedelhaleem Moghaieb  Hirofumi Saneoka  Junki Ito  Kounosuke Fujita 《Soil Science and Plant Nutrition》2013,59(2):377-385

Three commercial tomato cultivars (UC-97, Momotaro, and Edkawi) were subjected to a gradual increase of NaCI concentrations and the effect on biomass production and its parameters was compared. The data indicated that salinity reduced plant growth and the reduction was more pronounced in UC-97 and less in Edkawi. The apparent photosynthetic rate (P _o) was also depressed by the salt treatment and the depression was more remarkable in UC-97 and less in Edkawi. Edkawi shoot showed a much higher concentration of sodium ion and proline compared with the other cultivars, which may result in the maintenance of a higher turgor potential. In all the cultivars examined the stem diameter decreased after the beginning of exposure to light and recovered after the light was turned off. The decrease in the stem diameter during day light was enhanced and the recovery at night decreased after 1 d of salt treatment and the changes in the stem diameter were less conspicuous in Edkawi than in the other cultivars. These results suggest that Edkawi is more tolerant to salinity than the other cultivars due to a higher ability of maintaining the root function for the uptake and supply of water to shoot under salinity conditions but not due to the adjustment of transpiration from stomata.  相似文献