Effects of ultrasonic treatment on the maturation of Zhenjiang vinegar

High-quality vinegars are traditionally produced by aging them in barrels or bottles. However, these processes are very time-consuming. To accelerate of Zhenjiang vinegar maturation, the ultrasound was used to treat the steeped vinegar. Results showed that, the optimum ultrasonic power, time and ethanol addition for aging vinegar were determined to be 50 W/100 mL, 75 min and 0.75% (V/V), respectively. Under the optimum experimental conditions, the total amino acid of fresh vinegar decreased from 1082.259 mg/100 mL to 871.045 mg/100 mL. Several volatile components increased significantly, such as the total esters, aldehydes and heterocyclic. Total non-volatile organic acids increased from 202.59 mg/10 mL to 233.87 mg/10 mL. The changes of above-mentioned components develop towards the direction of mature vinegar. Coupling the HS-SPME/GC–MS analysis data with Principal Components Analysis, ultrasonic treatment vinegar was determined to be equivalent to 2–3 years of natural aged Zhenjiang vinegar. This study has showed that ultrasound is promising not only in shortening the aging time and lowering costs for the vinegar-making industry, but also in producing fine vinegar.     

晚清以来的镇江籍甲骨文研究学者

晚清以降,镇江籍甲骨文整理研究的学者较多,刘鹗是甲骨文研究的创始者,叶玉森、鲍鼎、陈邦福、陈邦怀、陈直等人亦有颇多贡献。     

高效液相色谱法测定镇江香醋中5-羟甲基糠醛的含量

采用高效液相色谱法,对镇江香醋中5-羟甲基糠醛进行了定量分析.样品中的HMF含量的测定条件为:以甲醇-水溶液(体积比为5∶95)为流动相,流速为1.0 mL/min,采用Venusil XBP-C18色谱柱分离,柱温为30℃,UV检测器的检测波长为284 nm.定量分析结果表明,镇江香醋中HMF的含量为8.01 mg/kg.高效液相色谱法分析镇江香醋中HMF含量的方法测定准确,稳定性高,HMF在0.014 3～0.085 8μg的进样范围内线性相关系数为R2=0.999 9,平均回收率98.66%,相对标准偏差为5.53%.     

The Ferry Cover Problem on Regular Graphs and Small-Degree Graphs

The ferry problem may be viewed as generalizations of the classical wolf-goat-cabbage puzzle. The ferry cover problem is to determine the minimum required boat capacity to safely transport n items represented by a conflict graph. The Alcuin number of a conflict graph is the smallest capacity of a boat for which the graph possesses a feasible ferry schedule. In this paper the authors determine the Alcuin number of regular graphs and graphs with maximum degree at most five.     

乌江洪家渡库周土地类型图编制的初步研究

洪家渡水电站是贵州省乌江梯级开发的一个龙头电站。本文通过野外实地考察，采用常规方法与遥感方法结合，就乌江洪家渡库周土地类型图编制的几个问题作一些初步探讨。     

2000-2005镇江市成年人体质状况的比较分析

通过2005年镇江市20-59岁的1863名成年人体质状况进行调查研究,以及同2000年1666名成年人身体形态、机能、素质所测均数进行对比分析,结果表明:5年间镇江市成年人身高均值有所增长,体形变胖;肺活量水平下降,心血机能提高;身体素质除坐位体前屈指标明显下降外,其余指标均变化不大或有所提高;整体综合评价有明显提高。     

历史街区及周边地段保护与开发的几点思考

历史街区是保存文物丰富并且具有重大历史价值或者革命意义的城镇、街道、村庄。历史街区在开发工作中存在一些认识误区,如历史街区开发就是房地产开发或旅游开发,言必谈“新天地”,保护和开发步子和规模要大,“权利审美”倾向严重等。以镇江为例,在历史街区保护与开发中也是有得有失,应总结推广西津渡古街区保护与开发的成功经验。     

山水为体 文化为魂——建设山水花园城市初探

山水花园城市是中西合璧的城市理想。镇江建设山水花园城市具有得天独厚的有利条件。应该以"山水为体,文化为魂"建设山水花园城市,并以此为契机,创建国际花园城市。     

镇江市中小学排球比赛面临的问题及对策

近年来镇江市中小学排球比赛面临参赛队伍少,基层排球活动逐步萎缩的状况,通过调研,分析其原因有:基层缺少一批有事业心、有一定专项业务能力的年轻教练员;多种原因造成基层学校缺乏组队参加市比赛的积极性;主管部门对三级传统学校组队参赛缺少约束机制;缺少良好的社会排球氛围等。有针对性地提出积极对策,以求促进教育和体育主管部门采取相应措施,推动中小学校积极开展排球活动。     

镇江救生会始末

镇江西津渡救生会创设之早，规模之大，影响之广，遗址保存之完好，世所少见。西津渡救生会渊源于宋代乾道年间。清代镇江善士蒋豫一家七代人相继办救生会140余年。后救生会扩大到沿江各渡口。康熙帝曾予褒扬，是为中国封建社会慈善救济事业的盛举。