Lactic acid bacteria(LAB)plays an important role in the production of sourdough,and has a significant impact on its flavor and other qualities.In order to select LAB starter culture for specialty sourdough and develop differentiated sour dough bread,this study evaluated the glucose metabolism capacity,organic acid production capacity and flavor characteristics of LAB strains isolated from different kinds of traditional fermented foods,and their effects on the flavor of sourdough and bread were also verified.The results showed that there were 6 LAB strains with strong glucose metabolism and acid production performance,and excellent flavor characteristics.The volatile flavor substances produced by these strains were mainly composed of alcohols,esters,ketones,aldehydes,acids,and other compounds.Among them,two Lactobacillus plantarum strains might be the main contributors of special flavors such as sourness,fruitiness and rice wine flavor to sourdough bread.These obtained strains provide resources for the development of sourdough starter culture with characteristic aroma components,and have potential for industrial application.

In order to study the quality change of coffee malt premixed powder with the extension of storage period, the coffee malt premixed powder was stored at the environment where the temperature is 25 ℃ and 35 ℃, respectively, and the relative humidity is 50% respectively. Its moisture, fatty acid value and falling value were monitored during the whole storage period. The volatile compounds were separated and identified by solid phase microextraction accompanying gas chromatography-mass spectrometry during the whole storage period. The results demonstrated that with the extension of storage period, the overall moisture content shows a falling trend, while the fatty acid value and falling value show an overall rising trend. The higher the storage temperature, the more significant the change is 41 kinds of main volatile compounds of coffee malt ready mixed powder were identified. It mainly includes 13 kinds of aldehydes, 15 kinds of heterocycles, 7 kinds of esters, 4 kinds of alcohols and 2 kinds of ketones. Among them, the relative concentration of aldehydes (n-hexanal, nonanal, trans-2-nonenal) showed an increasing trend with the extension of storage period.

学习动力是学生愿意为自己的学业付出努力的重要力量,其动力强度的大小会影响学生的学习效果.中等职业旅游教育的教学对象主要是应往届初中毕业生和部分高中生,这些学生在学习方面普遍存在学习动机不足、学习兴趣较低等问题,不利于教师课程教学目标的实现.ARCS动机模型作为一种动机激发理论,对学生的学习动机从注意、切身性、自信心和满足感等4个方面进行激发和维持.该理论为中职旅游专业的课堂教学提供了新思路,为解决中职旅游专业学生的学习积极性问题提供了新方法.本文主要运用ARCS动机理论,探讨中职旅游专业的教学策略,以期激发学生的学习积极性,提高中职旅游专业的课堂教学质量.

近年来，九台区文化和旅游资源开发态势良好，但其东部两乡一镇的开发却相对缓慢，反映出该区域 资金短缺、景点规模小、缺乏规划、配套基础设施差等问题。此文介绍了九台区东部两乡一镇即其塔木镇、莽 卡满族乡、胡家回族乡具有的部分文化和旅游资源，并结合其开发现状，提出拓宽资金来源、改善旅游环境、 科学规划、扩大宣传等开发策略。

以人本主义理论、建构主义理论为出发点,从制定改革目标、整合教学方法、创新考核形式、完善评价体系等方面论述了在地方本科高校旅游管理专业渐进式推行以学生为主体教学模式的理论与实践,认为该教学模式有助于提高学生的自主意识、创新思维、协作能力,同时也促进了教师教学技能、专业技能的提高.

东北文化博大精深,传播途径广泛,借助旅游产品可有效促进当地文化的传播.本文提出了通过对旅游饮食产品尤其是东北农家菜、少数民族特色菜;旅游住宿产品尤其是主题酒店外部环境营造和内部装修、员工服务;旅游交通产品尤其是传统交通工具、出租车、交通集散地点;旅游游览产品尤其是红色旅游、工业旅游;旅游购物产品尤其是非物质文化遗产代表作;旅游娱乐产品尤其是民俗节庆、舞乐戏剧、游戏竞技等的设计,多方面传播东北文化,加强人们对东北文化的深入认识与理解.

"以学生为主体的教学模式"受到越来越多高校的关注.旅游业的可持续发展对复合型创新性旅游人才的需求、现代素质教育对旅游高等教育的基本要求、地方本科高校向应用型转变的专业需要等因素凸显了地方本科高校旅游管理专业推行"以学生为主体的教学模式"的必要性;地方本科高校的人才培养定位、旅游管理专业较强的实践性、其他专业"以学生为主体的教学模式"的改革经验使得地方本科高校旅游管理专业推行"以学生为主体的教学模式"成为可能.

目的 建立用于葡萄中苯醚甲环唑、己唑醇和咪鲜胺残留检测的分析方法.方法 葡萄样品先经乙腈和水提取,盐析后取上清液进行水解并测定.通过优化前处理及色谱条件,建立色谱分析方法,结合目标物标准曲线进行定量分析.结果 经过3个水平的加标回收实验,所建立方法的平均回收率在79％～102％,相对标准偏差0.5％～6.9％(n=5).苯醚甲环唑和己唑醇的最低检出浓度为0.01 mg/kg,2,4,6-三氯苯酚的最低检出浓度为0.2 mg/kg.结论 所建立的分析方法操作简便,分离净化效果良好,显著提高前处理效率,灵敏度、准确度和精密度均达到农药残留检测要求.

文章分析了长吉图区域文化旅游资源概况、开发现状以及设计文化旅游产品的必要性;探讨了长吉图区域的三大支点,即长春、吉林、图们江各个地区都应有当地不同的主推的文化旅游产品的设计对策,即长春地区应主推萨满教、佛教文化旅游产品,吉林地区应主推佛、道、儒三教相融合的特色文化旅游产品,图们江地区应主推佛教文化旅游产品.从旅游辅助项目设计等出发,提出了长吉图区域宗教文化旅游产品设计方案.

吉林省的满族文化具有较强的旅游资源优势,但由于忽视整体旅游营销,导致知名度不高,无法获得应有的旅游市场份额及经济效益.本文借鉴7P市场营销理论的部分内容,有针对性地从改进旅游产品、采取效益最大化的促销手段、多渠道培养各层次专业人才3个方面,为其设计旅游营销策略,以期达到既传播满族文化又发展吉林省旅游业的双赢效果.

满族的先世从先秦至隋唐时期先后被中原王朝称为肃慎、挹娄、勿吉、靺鞨.满族在不同历史时期,虽称呼不同、变化复杂,但其分布及其发展脉络清晰可辨.先秦时期,肃慎分布在长白山、东流松花江及黑龙江下游流域的广阔地区;汉及魏晋时期,挹娄分布大致为东至日本海,南至长白山,北至乌苏里江汇流地及其下游、松花江、牡丹江中下游,西至张广才岭;南北朝时期,勿吉所辖地为东抵日本海,南至长白山,西至太沵河,北尽黑龙江中下游地区;隋唐时期,靺鞨主要分布在北至松花江及黑龙江上游,东至日本海,南至今朝鲜半岛北部,西南至辽河东岸.

The religious culture in Changjitu area has certain advantage in tourist resources , but can’t get the due economic benefits be-cause of lack of marketing strategy and low visibility .Based on the traditional marketing theory , this paper designs combined strategy of tourism marketing from the perspectives of adjustment of tourism products , flexible prices, and multiple promotion in order to create more economic and social benefit .

吉林省旅游资源丰富,文物古迹众多.目前吉林省文化遗产旅游资源开发中存在着价值取向扭曲、经营管理不善、缺乏对文化遗产资源的保护措施等问题.对此,要树立保护第一的原则,加强社区的参与,走可持续发展的道路,树立独特的景区特色,加强景区管理,提高景区服务质量,坚持走资源开发和保护相结合的道路.

相对于宗教文化旅游兴盛的地区来讲，长吉图区域宗教文化旅游的发展处于初级阶段，但也存在着和其他地区相似的缺乏法制监管、开发层次低、旅游环境差等若干问题。本文从加强法规建设，统一规划、综合开发，改善旅游环境等三个方面探讨了长吉图区域宗教文化旅游发展中应采取的主要措施，以期有利于该区域乃至吉林省宗教文化旅游的可持续发展。

An ultra performance liquid chromatography-tandem mass spectrometric method, with modified QuEChERS method for sample preparation, was developed for the determination of the 4 kinds of 29 banned and restricted veterinary drugs in chicken muscle, chicken liver, porcine muscle and porcine liver samples. The drugs were extracted with McIlvaine buffer solution and acetonitrile, then cleaned-up by modified QuEChERS method, and finally analyzed by ultra performance liquid chromatography-tandem mass spectrometry in multiple reaction monitoring mode via positive electrospray ionization. The method was validated at three fortification levels (LOQ level, 20 µg/kg and 50 µg/kg) in chicken muscle, chicken liver, porcine muscle and porcine liver samples. The validation results were as follows. The correlation coefficients of the standard calibration curves for the 29 veterinary drugs were all between 0. 993 and 0. 999 over their own concentration ranges. The average recoveries of the 29 drugs were between 71. 5% and 93. 2%, with the relative standard deviations (RSDs) between 0. 8% and 7. 7%. The limits of determination (S/N=3) of the drugs were between 0. 3 and 3. 0 µg/kg. The limits of quantification (S/N≥10) were 1. 0 µg/kg for amantadine, 10.0 µg/kg for the tetracycline drugs, and 5. 0 µg/kg for all the other drugs. It was indicated that the method developed is easy, sensitive, and has a good purification effect. The sensitivity, accuracy and precision of the method were all acceptable, and it can meet the requirements of the multiple residue analysis. So, this method can be further applied to investigate the veterinary drug residues in animal derived foods.

宗教文化不仅是人类传统文化的重要组成部分,而且越来越成为当代旅游资源的重要组成部分.长吉图区域作为中国目前唯一一个由国家批准实施的沿边开发开放区域、吉林省最活跃的旅游产业带,宗教文化旅游资源总体数量可观且类型齐全,整体知名度不是很高但品位上乘,宗教文化活动不是很多但影响较大,对其进行合理开发利用,将对该区域乃至吉林省旅游业的发展产生重要影响.

随着经济的不断发展,资源消耗也随之增加,环境资源压力日益增加.面对这一状况,国家在”十一五”规划纲要中就提出了节能减排的具体目标.文章阐述了城市节能减排的意义及其现状,并提出了城市节能减排的发展思路与趋势.

Application of frequency converters in sewage treatment process of Shenyang chemical industry group was introduced.The principle of frequency conversion energy-saving technology,energy-saving advantages of frequency converter,and application effect analysis were discussed.

文章分析了长吉图区域满族民俗旅游文化产品设计的必要性,从吃、住、行、游、购、娱等旅游六要素出发,提出了长吉图区域满族民俗旅游文化产品设计方案。

论文从政府主导立法,建立完善的民俗文化保护体系;扩大宣传,使全社会形成自觉保护、传承民俗文化的意识;成立专门的管理、研究、展示机构,科学、系统地传承民俗文化;在大中专院校设立相关课程、专业,培养民俗文化传承人;举办丰富多彩的民俗文化节庆活动,提升东北民俗知名度;策划新闻事件,营造良好的民俗文化氛围;设计、开发、推广民俗文化旅游产品,塑造东北民俗品牌形象等方面,提出了若干东北民俗文化的当代传承措施。