Abstract: The invention discloses an effusion cell with a retractable crucible for molecular beam epitaxy, comprising a crucible bracket, a mounting flange, a heat shielding cylinderarranged on an upper side of the mounting flange, a gate valvearranged on a lower side of the mounting flange, an outer cylinderarranged on a lower side of the gate valveand a driving devicefor driving the crucible bracketto move between the heat shielding cylinderand the outer cylinder, the heat shielding cylinderis internally provided with a heater, the outer cylinder driving deviceis hermetically connected to the outer cylinder.

Abstract: A latching apparatus and method for latching two separable apparatuses. The latching apparatus includes a moveable actuator and a bolt. The moveable actuator has a bolt facing north-pole magnet and bolt facing a south-pole magnet attached thereto. The bolt moves in response to the north-pole magnet and the south-pole magnet when the bolt is adjacent the actuator.

Abstract: A process is described for extracting soybean proteins. The process includes the steps of: preparing a fat-free soybean meal which comprises water soluble and water insoluble proteins; separating the water soluble and the water insoluble proteins; introducing a protease to the water insoluble proteins so as to transform the water insoluble proteins to the water soluble proteins; and precipitating the water soluble proteins with an acid. The process has a better protein yield and a lower production cost than that of conventional methods because of the use of proteases. The product of this invention is superior to that made according to the conventional methods, with respect to the appearance of the product, water preservation ability, flexibility, scatter ability in water, emulsification ability, compendency, etc.