https://scholar.ptuk.edu.ps/handle/123456789/42 Wed, 29 Apr 2026 17:01:00 GMT 2026-04-29T17:01:00Z https://scholar.ptuk.edu.ps/handle/123456789/919 Title: الأنماط الميسرة للتغيير لدى مديري ومديرات المدارس الحكومية في محافظة جنين من وجهة نظرهم ووجهة نظر معلميهم Authors: Rabiah, Maram; Iter, Nuha Abstract: هدفت الدّراسة الكشف عن الأنماط الميسرة للتغيير لدى مديري المدارس الحكوميّة ومديراتها في محافظة جنين من وجهة نظرهم ووجهة نظر معلّميهم، استخدمت الدراسة المنهج الوصفي، وتكوّن مجتمع الدّراسة من جميع مديري المدارس الحكوميّة ومديراتها في محافظة جنين، والبالغ عددهم (244) مدرسة، واختيرت عيّنة طبقّيّة قوامها (68) مدرسة حكوميّة، استخدمت استبانة تم ترجمتها ومواءمتها من الدراسات الأجنبية، وتك ّونت الاستبانة من(30) فقرة موزّعة على الانماط الميسرة للتغيير. وقد ت ّم التحقق من صدقها وثباتها واتساق الأداء على فقراتها بقيمة 0.74. توصلت الدراسة إلى نتائج من أبرزها:(71%) من مديري ومديرات المدارس الحكوميّة في محافظة جنين يمارسون الأنماط الميسرة للتغيير عند تطبيق التغيير. 1.حصل نمط الفاعل إداريّاً أعلى درجة ممارسة بنسبة (%71)؛ بينما نمط المنفّذ أّولا بأوّل فأقلها ممارسة بنسبة (%33)؛ 2. وجود فروق ذات دلالة معنوية، في درجة ممارسة مديري ومديرات المدارس الحكومية للأنماط الميسرة للتغيير؛ تعزى: لمتغير المؤهل العلمي على نمطي الواثق بالآخرين، والمنفذ أولاا بأول ولصالح حملة الشهادات الدراسية العليا؛ ولمتغير مستوى المدرسة على نمطي الاجتماعي غير الرسمي، والمخطط صاحب الرؤى ولصالح مديري المدارس الأساسية؛ ولمتغير المشاركة في برنامج دبلوم القيادة المدرسية على نمط المنفذ أولاا بأول، ولصالح المشاركين ببرنامج القيادة المدرسية في ضوْ النتائج أوصت الدراسة بضرورة تبني الوزارة لدورات حول الأنماط الميسرة للتّغيير لمديري المدارس، وإجراء دراسات حول هذا الموضوع لندرتها. Sun, 22 Sep 2019 00:00:00 GMT https://scholar.ptuk.edu.ps/handle/123456789/919 2019-09-22T00:00:00Z https://scholar.ptuk.edu.ps/handle/123456789/795 Title: Natural Induction of Potato Crop Resistance by Plant Essential Oil Elicitors to Control Green Peach Aphid Myzus persicae (Sulzer) (Homoptera: Aphididae) Authors: Abu-Alfayah, Ru`ya Abstract: Potato, Solanum tuberosum L., (Solanaceae) is one of the essential basic food crops worldwide. It has been attacked by many insect pests, such as aphids Myzus persicae (Sulzer) (Hemiptera: Aphididae). This research amid to use plant essential oil elicitors to improve the controlling method of the green peach aphid M. persicae. In this study, different essential oils (EO) from medicinal plants were tested against M. persicae. Assessment of their potential role in inducing plant resistance pathways on potato „Sponta” cultivar was studied. Measuring two common enzymes indicators such as guaiacol Peroxidase (POX) and Polyphenol oxidase (PPO) expressed in plants post-physical or chemical injury. The Electrical Penetration Graph (EPG) was also used to monitor changes in aphid behaviors. The impact of the EO on aphid feeding behavior XXII was monitored and recorded for 8 hrs post-treatment. The effect of the medicinal plants' oil on the aphid mortality was carried out and measured in vitro Results showed that 60% of the essential oil extracts have insecticidal activity against M.persica. Results also revealed that some EO have significantly increased the level of POX or PPO, and insect behavior compared to the control. Mustard, Sage, Jojoba, Eucalyptus, Bitter cucumber, Camphor, and Rosemary oil have natural induction in potato. Camphor, Sage, Pomegranate, and Bittercucumber caused a disturbance in GPA settling behavior and prolong searching for a feeding site. Mustard, Eucalyptus, and Sage resulted in delaying drop potential associated with non-persistent and semi-persistent. Lavender, Eucalyptus, and Mustard caused a delay in sieve element behavior associated with persistent virus transmission. Wed, 01 Jan 2020 00:00:00 GMT https://scholar.ptuk.edu.ps/handle/123456789/795 2020-01-01T00:00:00Z https://scholar.ptuk.edu.ps/handle/123456789/794 Title: Sensing Botrytis cinerea in Tomato Using Visible/Near-Infrared (VIS/NIR) Spectroscopy Authors: Najjar, Khadija Abstract: Gray mold disease caused by Botrytis cinerea is considered one of the most common diseases that affect tomato fruits and cause economic losses; early detection of the disease can reduce 50% of the losses and increase food security. Therefore, this study aimed to employ the visible/near-infrared (VIS/NIR) spectroscopy to sense the presence of gray mold on tomato fruits in the early stages. Identify of B. cinerea was carried out using the polymerase chain reaction (PCR). In addition, 30 homogeneous tomato samples were collected from three different varieties, i.e. Harver, Izmer and Ekram, 20 samples from each variety were injected with the pathogen and 10 samples from each variety were left as a control and were measured using the VIS/NIR spectroscopy daily for five days. Spectral data acquired from the VIS/NIR spectroscopy, with a range of 550-1100 nm, were analyzed using principal component analysis (PCA). It was found that the PCA on the second day after injection was able to distinguish completely between infected and healthy samples before symptoms appeared, also two PCs for VIS/NIR region explained approximately 99% of the total variance in the third and fourth day. Moreover, two PCs explained 98% of the total variance for PCA that applied for the average of infected samples for all days. The PCA results showed the ability of VIS/NIR spectroscopy to detect latent infections in tomato fruits as well as the early sensing of B. cinerea. Furthermore, when observing the infected samples from these varieties to detect which are resistant to gray mold disease, it was found that all of these varieties were sensitive to the disease. Mon, 01 Jun 2020 00:00:00 GMT https://scholar.ptuk.edu.ps/handle/123456789/794 2020-06-01T00:00:00Z https://scholar.ptuk.edu.ps/handle/123456789/762 Title: Isolation, Identification, Pathogenicity bioassay and Mass production of Indigenous Isolate of Entomopathogenic Fungi against Red Palm Weevil Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae) Authors: Husien, Hadeel Abstract: The high incidence rates of red palm weevil (RPW) Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae) in Palestine consider as serious threat to palm industry; due to the sudden death of the whole trees. In this study, different Palestinian indigenous entomopathogens were isolated from different locations in the West Bank such as entomopathogenic fungi, entomopathogenic bacteria, entomopathogenic nematodes and entomopathogenic viruses. The entomopathogenic fungi Beauveria bassiana, Metarhizium anisopliae were identified morphologically and molecularly, then their pathogenicity against the RPW was evaluated. Results showed that they have a significant effective against RPW. Thus they could be considered as alternative to the chemical control. Results also revealed that mass production of these indigenous entomopathogenic fungi could be carried out by using cheap and affordable agricultural by-products, that enhances the activity and provide date palm growers alternative active bio-control agents in a wide scale and for a longterm control. Mon, 01 Jul 2019 00:00:00 GMT https://scholar.ptuk.edu.ps/handle/123456789/762 2019-07-01T00:00:00Z