. Defazio,郭俊Dept. of N

Dr.VaLidity of Family History Data on Primary Adult-Onset DystoniaMartino D./Aniello M.S./Masi G. et al. [Dr. G. Defazio,Dept. of Neurol. and Psychiat. Sci., University of Bari,Piazza Giulio Cesare 11, 1-70124 Bari, Italy]Background: To our knowledge, no study has assessed thevalidity of family hist ory data provided     

政府.市场.农民

政府·市场·农民张培育农村社会主义市场经济体制，是我国９０年代农村改革的目标。推进农村经济市场化，是我国农村经济体制的又一次历史性变化，也是新疆农业再上新台阶，实现持续、稳定、全面、协调发展的根本所在。因此，认真分析和研究农村经济体制转换过程中的新情...     

商品人参中的无机元素的测定——原子吸收光谱法测定K.Na.Mg.Fe.En.Mn.Cu.Ni

人参Panax ginseng C.A.Meyer是我国传统补益药中最具有代表性的药物之一《神农本草经》载:“人参主补五脏,安精神、定魂魄、止惊悸、除邪气,明目、开心、益智、久服轻身延年。”临床应用至少已有两千多年的历史了。近年来国内外不少学者对人参进行了大量的生药、植化、生化、实验药理与临床等     

大户.大树.大调整

对农业和农村经济结构进行战略性调整是农村经济工作的中心任务，对此，大家没有异议。可一到实际工作中，却又总免不了“翻烧饼”。结果，“星星还是那颗星星，月亮还是那个月亮”，早籼稻还是那茬早籼稻，百姓家里还是那样“空空行囊”。 　　敢问结构调整路在何方？最近，笔者到江西铅山县紫溪乡调研，找到了答案：专业大户带动，不失为调整措施到位的一条“金光大道”。 　　这个乡共有 1 7万亩耕地。过去春播全是清一色的早籼稻，农民增产不增收。这些年，几个先知先觉的专业大户凭着对市场需求的耳聪目明，改早籼稻为红芽芋，一发而…     

How sensitive is U.S. agricultural trade to the bilateral exchange rate? Evidence from bulk,intermediate, and consumer‐oriented products

This article examines the dynamic effects of changes in bilateral exchange rates on changes in bilateral trade of bulk, intermediate, and consumer‐oriented agricultural products between the United States and its 10 major trading partners. We find that, for consumer‐oriented products, U.S. exports are highly sensitive to bilateral exchange rates in both the short and long run, while U.S. imports are mostly responsive only in the short run. For bulk products, on the other hand, U.S. exports and imports are relatively insensitive to exchange rate changes in both the short and long run. For intermediate products, exports and imports are responsive to exchange rate changes in the short run, but not in the long run. It is also found that income of the United States and its trading partners has a significant effect on U.S. exports and imports of the three types of agricultural products in both the short and long run.     

晒.晒.晒.日晒伤的 多种原因

日光性皮炎俗称"日晒伤",是由于皮肤暴露部位因日光过度照射,在暴露部位引起的皮肤急性光毒反应.日光中的中、长波紫外线辐射使真皮内多种细胞释放组胺、5-羟色胺、激肽等炎性介质,使真皮内血管扩张,引起组织水肿.