الأوراق العلمية


عرضالصفحاتالأوراق العربية ... عنوان الورقة + الملخصر.م
من 5 ـــ الي 12
الملخص

أجريت هذه الدراسة بمحطة الأرانب التابعه للشركة العامة للالات والمستلزمات الزراعية والحيوانية, تاجوراء, حيث تم استخدام 60 أرنب من سلالة النيوزيلاندى الابيض بعمر 4 أشهر قسمت عشوائيا إلي مجموعتين مجموعة الشاهد وتحتوي على 30 أرنب ومجموعة المعاملة (الإجهاد الحراري) 30 أرنب , كل مجموعة من المجموعتين السابقتين قسمت الي ثلات- مجوعات تحتوي كل منها على 10 أرانب غذيت المجموعة الآولى والثانية والثالثة على التوالي على علف مضاف اليه (5, 20, 60) ملجم/كجم فيتامين هـ طوال فترة الدراسة وهي 4 أشهر. تم تعيين طول فترة الحمل باليوم، حجم الخلفه ونفوق المواليد، معدل إنتاج الحليب ووزن الفطام أوضحت نتائج هذه الدراسة أن إضافة فيتامين هـ بمستوى 60 ملجم/كجم علف للأرانب عند درجة حرارة 30 م° أدى الي تحسين معنوى (0.05?P) في مجموع الصفات المدروسة.

1


عرضالصفحاتالأوراق الاجنبية .... عنوان الورقة + الملخصر.م
من 5 ـــ الي 13
الملخص

Thirteen fungal isolates from rotten strawberry fruits were collected from fields of Sharkia Governorate. The most frequent one was Botrytis cinerea. The susceptibility of Camarosa, Chandler, Kelia, and Sweet Charlie cultivars by B. cinerea showed that the Camarosa cultivar had the least incidence of total decay percentage at delayed cooling (4 h after inoculation), prompt cooling (1 h after inoculation), and accounted for 66.66% and 40.00% respectively. Other cultivars showed higher incidence of decay. The same pattern was observed in the severity of infection test. Prompt cooling was important for minimizing post postharvest decay of strawberries for both inoculated and non-inoculated fruits. Incidence and severity of decay were evaluated after storage for 7 d at 2?C plus a simulated retail display period of 1 d at room temperature (20?C).

1
من 14 ـــ الي 24
الملخص

Coagulase negative staphylococci (CoNS) constitute an increasing nosocomial problem especially in hospitals due to intrinsic and acquired resistance to antimicrobials agent. Our objective is to evaluate the CoNS in the adult intensive care units (ICU) and nursery intensive care units (NICU) of Northern Jordan Hospital, to different antibiotics. 128 air samples of 100 liters volume/min were collected by a microbiological air sampler from the above units during the period June to December, 2005. Air samples were impacted on Trypticase soy agar (TSA), and then incubated at 37 °C for 48 h. Each bacterial colony appeared on agar plates were sub-cultured on TSA or blood agar and incubated at 37 °C for 24-48 h, and then identified by standard methods. The average bacterial count in the ICU and NICU was 311.7 and 322 cfu/m3, respectively. CoNS were the most prevalent bacteria of all Gram positives in ICU (26.5%) and NICU (23.5%) with S. saprophyticus been the most isolated species (> 65%). CoNS were the most commonly isolated Gram positive cocci in ICU and showed remarkable resistance to Novobiocin (66.9 %), but high susceptibility (> 90%) to Ciprofloxacin.

2
من 25 ـــ الي 30
الملخص

This disease of olive trees was noticed throughout field surveys in the north of Jordan. Olive branches show necrosis and eventual blight starting at the old pruning points, damaged branches ends and broken branches by the end of the growing season. Disease symptoms are characterized by reddish discoloration starting on one side of the affected branch and then moves downward in the cortex and the phloem making long red strip of sunken tissue. At the advanced stages the xylem underneath form that growing red discoloration becomes brown. The affected xylem tissue at first appears as a sector in the cross section and then the whole xylem inside of the branch become affected. Those symptoms were previously attributed to improper pruning practices. However this case becomes rather a phenomenon affecting large population of olive trees in the olive plantations in the north of Jordan. It is suspected that one or more pathogenic fungi prevailed throughout past seasons becoming significant on predisposed olive branches and trees. This investigation aimed to evaluate the magnitude of the disease incidence and severity and also to confirm the pathogenic agents associated with such symptoms and test there pathogenecity. At the end to evaluate all possible control methods and management measures against this disease.

3
من 31 ـــ الي 42
الملخص

The present work was planned to synthesize some heterocyclic compounds containing pyrrolo[2,3-d]pyrimidines. Our approach to the synthesis of the target compounds started through the hydrolysis of 6-ethylthio-4-methyl-2-(p-methoxyphenyl)pyrimidine-5-carbonitrile by refluxing in ethanol containing sodium hydroxide to give the corresponding sodium salt derivative which in turn was acidified to give 5-cyano-4-methyl-2-(p-methoxyphenyl)pyrimidin-6(H)one. Chlorination of the 5-Cyano-4-methyl-2-(?-methoxyphenyl)pyrimidin-6(1H)-one afforded 6-Chloro-4-methyl-2-(p-methoxyphenyl)pyrimidin-5-carbonitrile, which reacted with ethyl glycinate hydrochloride to give Ethyl (5-cyano-4-methyl-2-(p-methoxyphenyl)yrimidin-6-yloxy)acetate, which underwent cyclization to give the ethyl 5-amino-4-methyl-2-(p-methoxyphenyl)-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylate. The reaction of 5-Cyano-6-chloro-4-methyl-2-(?-methoxyphenyl)pyrimidine with piperidine, and morpholine, gave the 4-Methyl-6-(morpholin-4-yl)-2-(?-methoxyphenyl)pyrimidine-carbonitrile and 4-Methyl-6-(morpholin-4-yl)-2-(?-methoxyphenyl)pyrimidine-5-carbonitrile respectively . The Ethyl 5-amino-4-methyl-2-(?-methoxyphenyl)-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylate was used as key intermediates in the synthesis of other pyrrolo[2,3-d]pyrimidine derivatives, pyrimido[4\,5\:4,5]pyrrolo[2,3-d]pyrimidines and triazolopyrro lopyrimidines by reaction with different reagents . Seven compounds were selected and screened in vitro for their antimicrobial activity against four strains of bacteria and two fungal species .

4
من 43 ـــ الي 57
الملخص

New divalent and trivalent transition metal complexes of 2-[(4 -[(Z)-1-(2-hydroxyphenyl)ethylidene]aminobutylethanimidoyl]phenol] were synthesized. The synthesized complexes were subjected to CHN, molar conductivity, magnetic moments, infrared, electronic and electron paramagnetic resonance spectra. The CHN elemental analyses showed the formation of 2:1 [M:L] ratio, The molar conductance measurements revealed the presence of non-electrolytic nature. infrared spectral results displayed the involvement of azomethine nitrogen atom and hydroxyl groups in coordination to the central metal ion. On the basis of electronic and electron paramagnetic resonance spectral studies, an octahedral structure was proposed for all complexes. Also the antibacterial activity of the Schiff base and its chelates were screened on some pathogenic bacteria.

5
من 58 ـــ الي 66
الملخص

Condensation of ethyl 3-formyl-1H-indole-2-carboxylate (1) with thiosemicarbazide in ethanol gave ethyl 3-(thiosemicarbazidomethyl)-1H-indole-2-carboxylate (2). Treatment of 2 with chloroacetic acid afforded the thiazolidin-4-one derivative 3. Condensation of 3 with aromatic aldehydes gave the corresponding arylidene derivatives 4a-c. Cyclization of 4a-c with hydroxylamine hydrochloride in the presence of sodium acetate yielded thiazolidino[4,5-c]isoxazoline derivatives 5a-c. The structure of the synthesized compounds were confirmed using elemental and spectroscopic analysis.

6
من 67 ـــ الي 83
الملخص

In this study the thermodynamic parameters of micelle formation for Brij-35 (the nonionic polyoxyethylene ether surfactants Brij 35 (C12E23 i.e. CH3(CH2)11(OCH2CH2)23OH) will be determined from kinetics data. The reaction used is the reduction of m-chloroperbenzoic acid by iodide. The initial concentrations of peracid and iodide were 4 x 10-6 M and 1.5 x 10-3 M respectively. Reactions were carried out in 0.003 M nitric acid and in presence of sodium sulphate and sodium perchlorate. .The results show that, the Hydrophilic “salting out” sulphate ions increase the rate constant of the reaction in the micelle and reduce the critical micellar concentration (CMC); whereas hydrophobic “salting in” ions perchlorate decrease the rate constant and have much less effect on the CMC. In all different conditions investigated the temperature seems to increase the rate and decrease the critical micelle concentrations.

7
من 84 ـــ الي 97
الملخص

Shallow refraction seismics has long been used for the determination of the near surface layer structure. The most common goal of this investigation in seismic prospecting for gas and oil was the definition of the static corrections . The model of near surface layer was the result of refraction interpretation allowing to derive estimates of the thicknesses and velocities of the near-surface layers by analyzing the first breaks of head waves. Several methods have been proposed for the interpretation of refraction data . However, all these methods have certain drawbacks restricting their range of applications. Nowadays the CDP method (Common Depth Point method) is the dominating method of surface acquisition. This information may be used to estimate static corrections. Additionally we can realize special velocity surveys in deeper shot holes and use their results (traveltimes) to derive velocity model of LVL ( Low Velocity Layer ). Their is no such a possibility in the case of Vibroseis method. In this case we must practically obtain all the information about LVL only from reflection field records. This information is mainly inherent in first breaks of refraction arrivals. In the presented paper the results of imaging near surface velocity heterogeneities of the medium in the wave pattern of finite difference acoustic modeling have been described. The main goal of this modeling was to define the effect of near surface layer heterogeneities on the breaks of head waves connected with shallow refractors. The effect of heterogeneities dimensions, velocity distributions in the near surface layer as well as the seismic signal parameters on the wave pattern of head waves breaks of reflection records has been estimated. The analysis has been undertaken to assess the possibility of applications these breaks for recovering near surface velocity distributions by means of head wave tomography. The seismic modeling has been performed using computer program of 2-D finite difference modeling available in the processing system ProMAX.

8
من 98 ـــ الي 107
الملخص

Non-parametric regression is type of regression analysis in which functional form of the relationship response variable and the associated predictor variable dose not to be specified in order to fit a model to a set of data. There are many different methods for non-parametric regression. We have used the local polynomial kernel estimator with the optimal choice of the smoothing parameter(s).Choosing the optimal smoothing parameter(s), which is usually called the bandwidth(s), is considered to be one the most important issue when using the kernel-based estimator. Also, the optimal bandwidth(s) played crucial role to uncover the structure of the underlying data. In this paper, we use simulation approach to make comparisons between two different strategies for selecting the optimal bandwidth(s), namely the Direct plug-In (DPI) selection method and the Residual Square Criterion (RSC) method. Within the context of these two strategies of selecting the optimal bandwidth(s), there are two different settings of choosing the smoothing parameter: global (single bandwidth) or adaptive (variable bandwidths). Moreover, four different example-regression models have been used in order to smooth the mean regression functions. Several statistical properties have been investigated in the simulation study. Such study must be restrictive because of the many possibilities to be consider, we decide to consider the following three elements: The size of sample (n). Distribution of the error's (normal, exponential). The kind of Design (fixed and random).

9
من 108 ـــ الي 113
الملخص

In [1] Regilhof proved that the binary cancellative ,abelian, locally compact semigroup when all of whose intern translations are open and continuous, is topologically embeddable in a locally compact binary topological group as an open subsemigroup. In this paper we prove a similar result for Menger n-groupoid with the topology . And we concluded the continuity of the n-ary operation ( ) in all arguments in topology .

10