Abstract: The present disclosure relates to double layered hydroxide-type compounds comprising both di- and tri-valent nickel ions, and the use of such compounds in electrodes for energy storage device in addition to a previously developed electrode using Fe2+ and Fe3+ “green rusts related compounds”.

Abstract: An injectable and moldable putty comprising biodegradable calcium-based compounds including calcium sulfate, hydroxyapatite, and tricalcium phosphate is invented. The putty hardens into a solid body when mixed with water, saline, serum, or other neutral aqueous solutions. The hardening time of the putty can be tailored in order to meet the specific requirements of various dental or orthopedic applications. The pH of the putty is neutral during and after mixing. The invented putty may be used as bone graft, bone implant, or implantable drug delivery device.

Abstract: Methods of mixing delivering biocompatible cement, paste, putty, or gel for bone and cartilage repair are described in this invention. Powder-like solid materials are loaded into a first syringe. Liquids are loaded into one or multiple syringes. The liquids are injected into the first syringe containing the solid materials. To force the liquids through the solid, prevent bubble formation and provide intimate intermixing, the liquids are injected in the very proximity of the plunger end of the syringe containing the solid materials. The first syringe is preferably held vertical with the tip facing up so as to avoid bubble formation that in turn could cause back-pressure build-up and plug the first syringe during injection. The described methods of mixing the liquids with the solids allows to form a rheological paste, cement, putty, or gel in the first syringe.