Three-dim ensional m easurem entof M C G in a norm al subject

The paper presents a morphological study of real time magnetocardiograms(MCGs) of a normal subject.The MCGs were measured by using a 3 D second order gradiometer connected to three rf SQUIDs in a prefabricated magnetically shielded room.The base line of the detecting coil for Bz is 2.8 cm and that of the coil for Bx and By is 1.4 cm.The magnetic field components perpendicular to the chest (Bz component )and tangential to the chest (Bx,By components) were studied.From isofield contour maps and arrow maps of the QRS wave of the MCG,when multiple sources exist simulataneously,we can infer the locations and positions of different sources by combining the Bz component with the Bx and By components.The analyzed results showed that a method using a 3 D second order gradiometer that we developed is useful for discriminating the directions and locations of multiple sources.

海洋头足动物多糖资源的开发与利用

头足动物种类繁多,分布广泛,渔获量大,资源十分丰富,是重要的经济海产。头足类动物常被加工为干品和冻品,加工的副产物,如内脏物、骨、皮、墨汁等约占总比例的30%,具有重要的药用价值。多糖类成分是头足动物副产物重要的活性成分,对于头足动物多糖类物质的开发研究,可综合利用海洋资源,变废为宝,具有良好的开发前景。本文对头足动物多糖资源及其在食品医药领域的应用进行综述。