Abstract: A concrete construction (100) made by 3D concrete printing that contains: two or more layers (102, 106) of cementitious material extruded one above the other, and at least one elongated steel element (104) reinforcing at least one of the layers (102, 106). The elongated steel element (104) has an elastic and plastic elongation at break that exceeds 4%. The high elongation of the elongated steel element gives an increased ductility to the concrete structure (100).

Abstract: A concrete construction made by 3D concrete printing having two or more layers of cementitious material extruded one above the other, and a reinforcing structure reinforcing the two or more layers. The reinforcing structure has at least two flexible longitudinal elongated steel elements running in lengthwise direction, and one or more flexible transverse steel elements forming an angle with the lengthwise direction so that these flexible transverse steel elements are present in the two or more layers. The structure also has a positioning element for positioning the at least two flexible longitudinal elongated elements and the flexible transverse steel elements, a polymer coating or yarns making stitches. The polymer coating or the stitches are applied on the at least two flexible longitudinal elongated steel elements, on the flexible transverse steel elements and on the positioning element thereby making a bond.

Abstract: A method for the induction of desiccation tolerance in plant embryoids is disclosed. The method entails using an excess of absissic acid and a coating of apolar and polar hygroscopic material.

Abstract: An improved spinneret for use in dry spinning spandex filaments has coaxial inner and outer rings of grouped orifices. The number of grouped orifices in each ring is equal. Each group of orifices is radially equally spaced from the next preceding or next succeeding orifice group. The spinneret provides spandex yarns with improved decitex uniformity.