هدف البحث الحالى إلى محاولة التأكد من البنية العاملية لمقياس الانفعالات الأكاديمية السلبية التى أعدته الباحثة، وتكونت مجموعة هذا من(200) تلميذ تلاميذ الصف الثانى الإعدادى، وتوصلت نتائج الصدق المحسوبة باستخدام صدق التحليل العاملى؛ وتشبعت جميع فقرات المقياس، كما تم التحقق للمقياس خلال عدد الاجراءات، ايجاد معاملات الارتباط العوامل ببعضها البعض، والاتساق الداخلى، والصدق، والثبات.

Improving photosynthesis to raise wheat yield potential has emerged as a major target for wheat physiologists. Photosynthesis-related traits, such as nitrogen per unit leaf area (Narea) and leaf dry mass per area (LMA), require laborious, destructive, laboratory-based methods, while physiological traits underpinning photosynthetic capacity, such as maximum Rubisco activity normalized to 25 °C (...

Field experiments were conducted to evaluate plant population and N-fertilizer effects on yield and yield components of maize (Zea mays L.). Three levels of plant populations (53000, 66000, and 800,000 plants ha⁻¹ corresponding to spacings of 75 × 25, 60 × 25, and 50 × 25 cm) and 4 doses of N (100, 140, 180, and 220 kg ha⁻¹) were the treatment variables. Results revealed that plant growth, ligh...

Single plane illumination microscopy based fluorescence correlation spectroscopy (SPIM-FCS) is a new method for imaging FCS in 3D samples, providing diffusion coefficients, transport, flow velocities and concentrations in an imaging mode. SPIM-FCS records correlation functions over a whole plane in a sample, which requires array detectors for recording the fluorescence signal. Several types of ...

Toxigenic Corynebacterium diphtheriae strains cause diphtheria in humans. The toxigenic C. diphtheriae isolate NCTC13129 produces three distinct heterotrimeric pili that contain SpaA, SpaD, and SpaH, making up the shaft structure. The SpaA pili are known to mediate bacterial adherence to pharyngeal epithelial cells. However, to date little is known about the expression of different pili in vari...

With the evolving technology in CMOS integration, new classes of 2D-imaging detectors have recently become available. In particular, single photon avalanche diode (SPAD) arrays allow detection of single photons at high acquisition rates (≥ 100 kfps), which is about two orders of magnitude higher than with currently available cameras. Here we demonstrate the use of a SPAD array for imaging fluor...

The photoelectric effect in a Ge-on-Si single-photon avalanche detector (SPAD) at an ultralow energy incident pulsed laser radiation is considered the frame of classical theory electrodynamics continuous media. It shown that which shared among huge number electrons Ge matrix can concentrate on only one these through constructive interference fields re-emitted by surrounding electrons. Conservat...

A closed system for plant production with artificial light is an innovative method of cultivation. The objective this study was to investigate the effect colour on rooting cuttings and subsequent growth chrysanthemum (Chrysanthemum × grandiflorum Ramat./Kitam.) During experiments, following conditions were maintained: photoperiod 16 h or 10 h, temperature 22 °C, relative humidity 65–70%. LED la...