六盘水市茶叶中茶多酚含量测定

采用福林酚法测定了六盘水市六枝特区、盘县和水城县三个县级行政区所产茶叶中茶多酚的含量,运用准确度、精密度及回收率等为评价指标,对研究数据的可靠性进行了验证。结果表明:六盘水市各地高山绿茶的茶多酚含量适中,含量在14.96%～23.58%之间,整体呈现出较优良的品质。     

“黑色幽默”的审美心理机制新探

黑色幽默在迄今为止的各类美学体系中均没有被作为一种独立的美学范畴来加以审视,它或者不被提及,或者被认为是喜剧的一种形式,或者被认为是“丑”的一种形态,或者被认为是荒诞的一种。本文认为,黑色幽默是一种独立的审美范畴,它的审美心理机制是:由于同时产生的悲喜剧感造成审美主体的精神分裂,这种分裂激活了潜伏于审美主体无意识中的精神分裂情结而使其升华为美感。     

论中英社交文化习俗差异

文化是人们需求的某一特定生活方式。通过对中国的饮食文化、茶文化与英国的pub（酒吧）文化对比以及中英party交际文化的对比，可看出中英文化习俗的差异。这表明对不同语言文化的了解和增强文化差异的意识是提高跨文化交际能力的关键。     

巴尔干和冷战的爆发

欧洲是冷战时期美苏争夺的主要场所,而德国又是美苏在欧洲争夺的中心。但冷战的起源则来自欧洲的东南端,即巴尔干半岛。在那里聚汇着二战后初期美苏两国的矛盾:的里雅斯特的争端、处置战败国罗马尼亚和保加利亚的问题、黑海海峡的风波、希腊内战……导致杜鲁门主义的诞生,从而揭开冷战的帷幕。     

A snapchat story: how black girls develop strategies for critical resistance in school

ABSTRACT

Drawing from Black, feminist epistemologies as well as theories of critical consciousness, and adolescent digital literacies, this paper analyzes the narratives of 7 Black, female high school students who experience oppressive practices, including racial microaggressions, silencing, harsh discipline, and marginalization within a predominately White school environment. At this juncture in which race, politics, and activism intersect with school, media, and identity, this study discusses how Black, female students resist oppression and use digital and social media as well as other available tools to speak out against injustice and heighten the racial awareness of their school community. This qualitative case study uses individual and focus group interviews to examine the ways in which Black female students develop critical resistance strategies, working individually and collectively within existing structures to fight for their humanity and liberation.     

Faith,Race, and LGB Affirmation: Experiences of African American Counselors‐in‐Training

In this phenomenological study, the authors investigated the experiences of African American counselors‐in‐training, with roots in the Black church, as they navigated their faith and professional responsibilities to provide affirming services to lesbian, gay, and bisexual clients. Findings suggest attitudes toward lesbian, gay, and bisexual clients are intertwined with faith, race, and community allegiance.     

茶叶中铜铅含量的检测

茶是中华民族的传统饮品,其品种众多,主要从不同的工艺、同种工艺的不同品种、同一品种的不同等级这三方面进行分类.本文利用原子吸收光谱法对在市场上随机收集的各种茶叶中铜、铅的含量进行测定.分析结果表明,茶叶中铜、铅含量和分布状况与茶叶的品种、品质和等级有密切关系.     

(White) women on the move: Suffrage memory and the 1977 International Women’s Year Conference

ABSTRACT

This essay examines how the 1977 International Women’s Year Conference (IWY), a historic gathering of women in Houston, Texas—tasked to put forward a series of policy recommendations, many informed by a feminist perspective—undercut its own intersectional impulse by leveraging collective memory of U.S. suffrage activism. I analyze the conference program, a document distributed to every conference attendee, that called up early woman’s movement history and suffrage memory in its language, ephemera, and image to constitute a certain narrative for the 1977 IWY audience. I argue that by linking the IWY conference to a specific narrative of women’s rights and suffrage activism, the planners made the conference more explicitly political and feminist, and imbued the event with historical significance and legitimacy. At the same time, the deployment of suffrage memory ultimately positioned white women as mobile and engaged in social movement while effacing Black women and women of color who had been involved in suffrage activism, thus rendering them immobile, invisible, silent, and locked in the past. I conclude by examining a concurrent counter-narrative, one not included in the program, as a productive, intersectional rupture in suffrage memory at IWY.     

武夷岩茶中茶多酚的提取及工艺研究

用离子沉淀、微波 离子沉淀、有机溶剂直接萃取三种方法提取武夷岩茶中茶多酚,提取率分别是4.41±0.43%、6.53±1.37%、5.83±0.08%。沉淀法提取的粗品纯度为21.12%(水溶解)和14.54%(乙酸乙酯溶解);有机溶剂直接萃取的粗品纯度为69.88%(水溶解)和83.88%(乙酸乙酯溶解)。茶多酚粗品红外光谱分析的结果为单宁酸;紫外光谱分析的结果吸收峰在270~273.5nm之间。     

THE IMPACT OF HISTORICALLY BLACK COLLEGES AND UNIVERSITIES ON THE ACADEMIC SUCCESS OF AFRICAN-AMERICAN STUDENTS

Anchored in national longitudinal data analyzed through hierarchical linear and non-linear modeling, this study found that African-American students have a similar probability of obtaining a BA degree whether they attended a historically Black college or university (HBCU) or a historically White college or university (HWCU). Among African-Americans, females are more likely to obtain a baccalaureate degree than males. Especially given that HBCUs are significantly underfunded relative to HWCUs, the findings of this study lend support to the proposition that HBCUs contribute significantly to higher education in this country and merit strong support from both the public and private sectors. This paper was presented at the American Education Research Association Conference in April 2005.