Influence of Teacher-Student Relationships and Special Educational Needs on Student Engagement and Disengagement: A Correlational study.

Contemporary educational research has found that student engagement and disengagement have a relevant influence on learning outcomes. However, research on the influence of teacher-student relationships in the engagement of students with special educational needs (SEN) is scarce. The purpose of this study is to analyze the impact of teacher-student relationships, peer support at school, family support for learning, opportunities to participate at school, and SEN on engagement and disengagement of students using a sample of secondary students with SEN and typical development (TD).

The binding effectiveness of anti-r-disintegrin polyclonal antibodies against disintegrins and PII and PIII metalloproteases: An immunological survey of type A, B and A+B venoms from Mohave rattlesnakes.

Snake venoms are known to have different venom compositions and toxicity, but differences can also be found within populations of the same species contributing to the complexity of treatment of envenomated victims. One of the first well-documented intraspecies venom variations comes from the Mohave rattlesnake (Crotalus scutulatus scutulatus). Initially, three types of venoms were described; type A venom is the most toxic as a result of ~45% Mojave toxin in the venom composition, type B lacks the Mojave toxin but contains over 50% of snake venom metalloproteases (SVMPs).