OBJECTIVE A study was conducted to test six threonine (Thr) levels (0.39%, 0.44%, 0.49%, 0.54%, 0.59%, and 0.64%) to estimate the optimal dietary Thr requirements for Longyan laying ducks from 17 to 45 wk of age. METHODS Nine hundred Longyan ducks aged 17 wk were assigned randomly to the six dietary treatments, where each treatment comprised six replicate pens with 25 ducks per pen. RESULTS...

Recent studies have revealed that emotional competences are relevant to the student's learning process and, more specifically, in the use of learning strategies (LSs). The aim of this study is twofold. First, we aim to analyze the relationship between perceived emotional intelligence (PEI) and LSs applying the scales TMMS-24 and Abridged ACRA to a sample of 2334 Spanish university students, whi...

The studies devoted to the so-called good language learners that emerged in 1970s (Rubin 1975) reveal efficient fall back on an abundant and highly individualised array of techniques strategic behaviours related employed while learning. well-known taxonomies by Oxford (1990) O’Malley Chamot gave rise analyses investigations field learner autonomy self-development, also pronunciation learning/te...

introduction geographically risk of an area determines the nature of disasters, their magnitude and spatial distribution. geographically risk is been controlled by several environmental variables such as geographical situation, climatic characteristics, topography, landform processes, land changing and human impacts. in many countries environmental crises generally is under influences of inabil...