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NUMERICAL TAXONOMY STUDY ON SPECIES OF CLEOMACEAE IN EGYPT
2009
Al-Dakheel, . Almhiemd | Alnajm A.
ABSTRACT A data matrix comprising 100 characters of morphology, anatomy and seed protein banding recorded comparatively for ten species of Cleome and Gynandropsis (Cleomaceae) was analyzed under three fundamentally different numerical methods. The PRIMER analysis used the Bray Curtis (SØrensen) distance measure together with the single linkage clustering methods. The SPSS program used Ward’sclustering as a distance measure and the average linkage clustering method distance or complete linkage distance. All three dendrograms agree in grouping the ten species into two major groups: A (including C. droserifolia and C.chrysantha) and B (including C. amblyocarpa, C. paradoxa, C. arabica, C. viscosa C. brachycarpa, C. scaposa, C. hanburyana and Gynandropsis gynandra).This indicates that Gynandropsis gynandra ought to be submerged in Cleome as Cleome gynandra
显示更多 [+] 显示较少 [-]MONITORING THE SEASONAL FLIGHT ACTIVITY OF STEM BORER MOTHS TO DETERMINE THE PROPER TIME FOR RELEASE TRICHOGRAMMA PARASITOID AT SUGARCANE FIELDS IN UPPER EGYPT
2009
The seasonal flight activity of both sugarcane stem borer moths Sesamia cretica Led. (Noctuidae: Lepidoptera) and Chilo agamemnon Bles. (Pyralidae: Lepidoptera)were monitored with Robinson light trap for two successive years 2005/2006 & 2006/ 2007 at El-Mattana Agricultural Research Station, Qena Governorate, to determine the proper time for releasing the egg-parasitoid, Trichogramma evanescens West. for biological control program to the two mentioned borers without any application with chemical pesticides. The obtained results showed that, the moths of the greater sugarcane stem borer, S. cretica had a main period of seasonal activity extended from spring to early summer (April to June) and had another four small peaks of seasonal activity at sugarcane fields occurred in April, June, July, and October. The small sugarcane stem borer moth, C. agamemnon had two main periods of seasonal activity at sugarcane fields. The first period extended from spring to early summer (March to June) and the moths probably recorded two broods during this period, whereas the second period was relatively smaller and occurred during July. Results of statistical analysis showed that, the combined effect of the three main weather factors (mean of min. & max. temperatures and %R.H.) two weeks earlier were responsible on the changes in the seasonal flight activity of S. cretica moths for 51.6% and 66.7% explained variance for the 1st and 2nd year, respectively. Also, these factors were responsible on the changes in the seasonal flight activity of C. agamemnon moths for 57.7% and 44.1% explained variance for 1st and 2nd year, respectively. So, it could be recommended that, the egg-parasitoid, Trichogramma evanescens releasing program must be started at mid- April for autumn and spring plantations, while for the next ratoons after two months from harvest and continued biweekly intervals to the end of June.
显示更多 [+] 显示较少 [-]UTILIZATION OF CAROB PODS IN THE PRODUCTION OF ALTERNATIVE TO COCOA POWDER
2009
Roasting process of carob pods at various temperatures for different times was carried out to study the effect of its process on the chemical constituents, minerals content, phenolic compounds and antioxidant activity. Volatile compounds were also determined for roasted carob powders. The obtained results revealed that the protein content was 5.42% (on dry weight basis), which decreased with increasing the processing temperatures. Whereas, ash increased gradually by increasing the roasted temperatures but lipids was decreased. The predominant mineral in carob powders was calcium followed by sodium, potassium and magnesium, respectively whereas; the raw carob pods contain 21.07mg/g of total phenolic compounds. Roasting treatment caused to the degradation of phenolic compounds which increased with increasing the roasting temperatures. The antioxidant activity of the carob powders was determined by 2,2-diphenyl-1-picryl-hydrazyl (DPPH) as free radical scavenging. However, the activity of antioxidant was decreased owing to the roasting process. On the other hand, sensory characteristics for both hot drinks and prepared cakes showed greater preference, especially for samples contained roasted carob powders at 160˚C for 30 min. and/or 40min. compared with that in tested samples and control. Seven aroma compounds were positively identified by using GC–mass spectrometry. The major aroma compounds of carob powders were 3-methyl butanal and methyl propanal which was found in chocolate and it's responsible for chocolate flavor. Moreover, other volatile compounds were identified in roasted carob powders and which also found in dark chocolate such as 2-Heptanone, Pentan-2-ol and Linalool. Also, Nonane-2-one and Hexanal were found and identified in roasted carob powders.
显示更多 [+] 显示较少 [-]REPRODUCTIVE TOXICITY OF BACILLUS THURINGIENSIS BIO-PESTICIDE IN MALE ALBINO RATS
2009
The present study is a trial to investigate the toxic effects of the bio-pesticide Bacillus thuringiensis (Bt) on male reproductive system of rats. Rats received dietary doses each approximately equivalent to 1/10 or 1/100 of the LD50 value of the Bt bio-pesticide (Agerin) for 90 consecutive days. Sex organs weight, semen picture, concentrations of the hormones [i.e., testosterone, luteinizing hormone (LH), and follicle stimulating hormone (FSH)], and histopathological changes in testes were the criteria used to evaluate the reproductive toxicity on the treated rats. Btat the higher dose caused a significant decrease in the weight of testes and seminal vesicles as compared with control. Both Bt doses decreased sperm count associated with an increase in the morphologically abnormal spermatozoa; however sperm motility was significantly decreased in treated rats with the higher dose only. The concentration of serum testosterone was significantly reduced in both treated groups; however LH and FSH levels were significantly reduced in treated rats with the higher dose. Histopathological examination of Agerin-treated male rat's testes revealed that both Bt doses caused testicular degeneration in a dose-dependent manner. In conclusion, Agerin may decreases fertility in adult male rats by affecting the concentrations of pituitary gonadotrophins, testosterone and thus subsequent spermatogenic impairment
显示更多 [+] 显示较少 [-]PRODUCTION OF LOW CALORIC DEHYDRATED VEGETABLE MIXTURES
2009
S.A.S . Mehasen | M.A Ahmed | A.A . Nuaman | El-Behairy A. | Zaki Lashine | Ahmed H.
Hot flow air currents were used in sheld dryers to dehydrate some vegetables (squash, peas, green beans, potatoes, yellow carrot, tomatoes, onion, green pepper, yellow pepper, red pepper, cauliflower and eggplant) which were used to prepare 8 recipes of dehydrated vegetable mixture (vegi-mix). Sensory evaluation indicated that, 4 recipes of vegi-mix's recorded the highest scores of sensory evaluation and considered the prefer recipes and stored at ambient temperature up to 3 months during which, the physicochemical composition, the antioxidants and microbiological examination were assessed. Results revealed that the recipe composed of yellow, green and red paper, cauliflower and eggplant to prepare the vegi-mix caused to increase of total phenolic compounds, total flavonoids and total carotenoids content. The moisture contents were in the range of (8.62-9.78%); ether extract (10.23-16.76%); total carbohydrate (51.6-53.6%); crude fiber (9.62-10.61%) and total calories (340.43-375.36 kcal/100g dry weight basis respectively) for the selected 4 recipes. On the other hand, the tested vegi-mix's being also as a good source of fibers, minerals and antioxidants. Changes in moisture, crude fibers, total solids, total carbohydrate, chlorophyll a and b and total carotenoids, flavonoids and phenolic compounds as well as total bacterial counts, yeast and mould counts, sporeforming bacterial counts content were also studied during 3 months of storage at ambient temperature. A little decremental was observed in total phenolic compounds, total flavonoids content through 3 months of storage for the tested vegi-mix's. Results also showed that all tested vegi-mix's. were microbiologically safe up to 3 months of storage and maintained original sensory properties. Therfore, dehydrated vegi-mix's composed of squash, peas, green beans, potatoes, carrot, tomatoes, onion, green, red and yellow pepper, cauliflower and eggplant without herbs considered as a good source of antioxidants, minerals, high nutritional value, good palatability and healthy safe through three months of storage at ambient temperature.
显示更多 [+] 显示较少 [-]ASSESSMENT OF THE ENTOMOPATHOGENIC FUNGUS BEAUVERIA BASSIANA SAUDI ARABIAN ISOLATE (B - SA3) AGAINST THE DEVELOPMENTAL STAGES OF THE RED PALM WEEVIL, RHYNOCHOPHORUS FERRUNGINEUS (OLIV.)
2009
The efficacy of the entomopathogenic fungus Beaveria bassiana Saudi Arabian isolate (B-SA3)was evaluated against the red palm weevil, Rynochophorus ferrungineus (Oliv.).The mentioned isolate was assessed on the different developmental stages of the red palm weevil through toxicity tests, i.e. determination of lethal concentration and lethal times to kill 50% of treated insects. The results showed that 8th instar larvae were the most tolerant followed by pupa to B.bassiana as their LC50 values were 3.75x 108 and 3.78x 107 conidia/ ml, respectively. Meanwhile, 4th instar larvae were the most susceptible to infection by B.bassiana (B-SA 3), as LC50 value was 3.25x 106 conidia/ ml, which proved insignificantly different to that determined in adult weevils, i.e. 4.18x 106 conidia /ml. Furthermore, LT50 values were very similar in these latter mentioned developmental stages in any considered concentration; meanwhile, LT50 was much longer in 8th instar larvae than the other considered instar and/or developmental stages. The fungus B. bassiana was most virulent to eggs of the red palm weevil as none of the eggs hatched following their treatment with any of the considered concentrations (ranging between 5x 109 to 5x105 conidia /ml). Moreover, germination viability of harvested conidia of B.bassiana stored at -4°C was insignificantly affected up to the 10th month storage period and was well above 90%. However, germination percentage of conidia then decreased to 70.27% after 16 months of storage. Also, the virulence of the stored conidia was tested after 1, 6, 12 and 16 months on adult red palm weevils, the LC50 values were 3.75x106, 4.66x106, 4.17x107 and 3.37x108 conidia/ ml, respectively. These results show that there was a significant decrease in the virulence of the tested fungus when the duration of storage period was more than 10 months.
显示更多 [+] 显示较少 [-]DISAPPEARANCE OF AZOXYSTROBIN, CYPRODINIL, FLUDIOXONIL, FENHEXAMID AND MYCLOBUTANIL IN STRAWBERRY FRUITS UNDER FIELD CONDITIONS
2009
A field experiment was carried out at Nubariah region Alexandria desert road located at 120 Km from Cairo, (Egypt) during 2005-2006 to study the degradation rates of five fungicides azoxystrobin, cyprodinil, fludioxonil, fenhexamid, and myclobu-tanil in strawberry fruits after application with their recommended rates under field conditions. The samples were collected in successive intervals after spraying and transported to Bioforsk refer-ence Lab, Ǻs, Norway for analysis by GC/MS. The fungicide residues on strawberry showed different degradation rates after treatment, with first-order kinetics. Half-lives (t0.5) were 1.92, 4.99, 3.68, 6.02 and 5.17 days for azoxystrobin, cyprodinil, fludioxonil, fenhexamid and myclobutanil, respectively.
显示更多 [+] 显示较少 [-]STUDIES ON NEEM SEED KERNEL EXTRACTS AS OVIPOSITION DETERRENTS AND OVICIDAL COMPOUNDS FOR THE COTTON LEAF WORM MOTHS, Spodoptera littoralis (Boisd.)
2009
H.A Gomaa
Mated female moth of the cotton leafworm, S. littoralis laid a total number of 1564.22 eggs during its whole life. In a free choice test, treating N. oleander leaves (as an oviposition site) with an aqueous extracts of neem seed kernel solutions extracted by different organic solvents reduced the number of deposited eggs on it. The lowest number of eggs was recorded when methanol was used for extraction, followed by chloroform, and the highest was, however, obtained after using benzene, butanol and ethyl acetate. The number of deposited eggs decreased as the concentration of any tested neem extract increased to reach the minimum at 0.2%. This means that the most deterred neem seed kernel extract is that which extracted with methanol at the concentration of 0.2%.Hatchability percentage of S. littoralis eggs greatly affected by the type of organic solvents used for neem extraction and the concentration of each extract on treated N. oleander leaves. The lowest hatchability was recorded after using methanol, followed by chloroform.On the other hand, an increase in neem seed kernel extract concentration caused an obvious decrease in egg hatchability.
显示更多 [+] 显示较少 [-]ISOLATION AND IDENTIFICATION OF AN ACARICIDAL GLYCOSIDE FROM Acacia saligna LEAVES
2009
A.M Moussa | A.M Emam | M.A. Mohamed | A.E Mohamed
as sources of biologically active secondary metabolites including pesticides because of their eco-friendly nature. The present study indicated that the ethylacetate extract of the Acacia saligna leaves exhibited acaricidal activity against the phytophagous twospotted spider mite ( Tetranychus Urticae Koch ). The chromatographic separation methods led to isolation of a pure compound from Acacia saligna leaf ethylacetate extract which exerted acaricidal action against the tested mite with LC50 value of 74.13 mg.l-1 after 48 h. Based on chemical (acid hydrolysis) and spectroscopic (1H, C13- NMR and MS) methods, the isolated compound was identified for the first time from plants as 2-hydroxymethyl-9-hydroxy-9-methyl-undecanyl (O-α-L-arabinopyranosyl-β-D-galactopyranoside.
显示更多 [+] 显示较少 [-]RURAL WOMEN ADOPTION OF ENVIRONMENTAL PRACTICES IN MENUFIYA GOVERNORATE
2009
Salama F.A | Farahat A. Mohamed | Eman M. Osman
This study aimed basically at identifying the level of rural women adoption of environmental practices in Menufiya Governorate. This main obective was achieved throw the followinge sub-objectives : determining the environmental knowledge level of rural women, identifying the dgree of rural women application of environmental practices, determining the factors which correlated with each of the environmental knowledge level and dgree of rural women application of environmental practiece. The study was carried out in two villeges in Menufiya Governorate, the first villege was Monshiat Bakhaty which belongs to Shebien Elkom district and the sconede villege was Sahel Elgawaber which belongs to El shohadaa district. 100 rural women were selected randomly from each village. The study findings were: the environmental knowledge level was high as 83.5% from respondents. About 47% from respondents were applying the environmental practices. There were four independent variables (social participation, culturel cosmoplitness, geographical cosmoplitness, age) explained together 16.3 % of the total variance of the environmental knowledge level. There were six independent variables (family monthly incom, environmental situation at the village, cultural cosmoplitness, family education, geographical cosmoplitness, environmental knowledge) explained together 55.5% of the total variance of the environmental application dgree.
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