首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   8篇
  免费   0篇
教育   4篇
科学研究   3篇
各国文化   1篇
  2019年   1篇
  2016年   1篇
  2015年   1篇
  2013年   2篇
  2012年   2篇
  1998年   1篇
排序方式: 共有8条查询结果,搜索用时 218 毫秒
1
1.
The article presents a new adaptation programme entitled ‘With a smile to school’ for pupils of the first year at primary schools. The adaptation programme comprises several methods and measures which are focused on the regulation of pupils’ adaptation process. The efficiency and effectiveness of the adaptation programme were verified through an experiment at selected primary schools in Slovakia in the school year 2016/2017. Based on the experiment results, a proposal for implementation of the adaptation programme to school practice was drawn up. The experiment results were evaluated by means of selected statistical methods.  相似文献   
2.
Based on the work conducted by trait psychologists, this cross-cultural investigation sought to examine young adults’ trait affection given and trait affection received in the U.S., Russia, and Slovakia as functions of (a) Hofstede’s four primary dimensions of national cultures (i.e. masculinity–femininity, individualism–collectivism, uncertainty avoidance, and power distance), and (b) national origin. Undergraduate students (N = 558) from the U.S. (n = 214), Russia (n = 169), and Slovakia (n = 210) completed a questionnaire in their native languages. The results of regression analyses and analyses of variances supported the notion that the four dimensions of national cultures influence people’s trait-like attributes and therefore also result in significant differences among the three countries examined in this investigation.  相似文献   
3.
Determination of amyloid β (Aβ) isoforms and in particular the proportion of the Aβ 1-42 isoform in cerebrospinal fluid (CSF) of patients suspected of Alzheimer's disease might help in early diagnosis and treatment of that illness. Due to the low concentration of Aβ peptides in biological fluids, a preconcentration step prior to the detection step is often necessary. This study utilized on-chip immunoprecipitation, known as micro-immunoprecipitation (μIP). The technique uses an immunosorbent (IS) consisting of magnetic beads coated with specific anti-Aβ antibodies organized into an affinity microcolumn by a magnetic field. Our goal was to thoroughly describe the critical steps in developing the IS, such as selecting the proper beads and anti-Aβ antibodies, as well as optimizing the immobilization technique and μIP protocol. The latter includes selecting optimal elution conditions. Furthermore, we demonstrate the efficiency of anti-Aβ IS for μIP and specific capture of 5 Aβ peptides under optimized conditions using various subsequent analytical methods, including matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS), capillary electrophoresis, microchip electrophoresis, and immunoblotting. Synthetic Aβ peptides samples prepared in buffer and spiked in human CSF were analyzed. Finally, on-chip immunoprecipitation of Aβ peptides in human CSF sample was performed.  相似文献   
4.
We present an integrated microfluidic chip for detection of β-amyloid (Aβ) peptides. Aβ peptides are major biomarkers for the diagnosis of Alzheimer''s disease (AD) in its early stages. This microfluidic device consists of three main parts: (1) An immunocapture microcolumn based on self-assembled magnetic beads coated with antibodies specific to Aβ peptides, (2) a nano-porous membrane made of photopolymerized hydrogel for preconcentration, and (3) a microchip electrophoresis (MCE) channel with fluorescent detection. Sub-milliliter sample volume is either mixed off-chip with antibody coated magnetic beads and injected into the device or is injected into an already self-assembled column of magnetic beads in the microchannel. The captured peptides on the beads are then electrokinetically eluted and re-concentrated onto the nano-membrane in a few nano-liters. By integrating the nano-membrane, total assay time was reduced and also off-chip re-concentration or buffer exchange steps were not needed. Finally, the concentrated peptides in the chip are separated by electrophoresis in a polymer-based matrix. The device was applied to the capture and MCE analysis of differently truncated peptides Aβ (1–37, 1–39, 1–40, and 1–42) and was able to detect as low as 25 ng of synthetic Aβ peptides spiked in undiluted cerebrospinal fluid (CSF). The device was also tested with CSF samples from healthy donors. CSF samples were fluorescently labelled and pre-mixed with the magnetic beads and injected into the device. The results indicated that Aβ1-40, an important biomarker for distinguishing patients with frontotemporal lobe dementia from controls and AD patients, was detectable. Although the sensitivity of this device is not yet enough to detect all Aβ subtypes in CSF, this is the first report on an integrated or semi-integrated device for capturing and analyzing of differently truncated Aβ peptides. The method is less demanding and faster than the conventional Western blotting method currently used for research.  相似文献   
5.
Background:?The school environment has shown itself to be an important factor in explaining adolescent behaviour. The relationships and experiences that pupils have at school have been found to influence their development, psychological well-being, self-esteem and social adjustment.

Purpose:?The aim of the study is to explore whether there is a relationship between pupil–peer and pupil–teacher relationships and psychological well-being and self-esteem, and whether this relationship varies according to pupils’ experience of bullying or being bullied.

Sample: Data consisted of a sample of 3694 students (mean age?±?SD 14.3?±?0.62 years; 51% girls) from elementary schools in Slovakia.

Design and method:?Questionnaires were administered to the students. In terms of data analysis, linear regression was firstly used in the whole sample to explore pupil–peer and pupil–teacher relationships and psychological well-being (the depression/anxiety and social dysfunction subscales of GHQ-12) and self-esteem (positive and negative self-esteem subscales of RSE). Next, the whole sample was divided into four groups in terms of involvement in bullying (normative contrasts, passive victims, aggressive non-victims and aggressive victims). Linear regression was used to explore the associations between pupil–peer and pupil–teacher relationships with the two factors of psychological well-being and two factors of self-esteem in these four groups.

Results:?As findings showed, better pupil–peer relationships and also pupil–teacher relationships were significantly related statistically to less depression/anxiety and social dysfunction, as well as to more positive and less negative self-esteem. All bullying categories were significantly related to pupil–peer relationships and the four dependent variables. However, in the categories of aggressive victims and aggressive non-victims, the pupil–teacher relationship was not significantly related to their psychological well-being and self-esteem. Also, in all subgroups, better pupil–peer relationships were significantly related to less depression/anxiety and social dysfunction, as well as with more positive and less negative self-esteem.

Conclusion:?Given the differences found in the connections between pupil–teacher relationships and well-being and self-esteem, between those who bullied and those who were bullied, it would seem that the school environment can play an important role in implementing anti-bullying prevention strategies.  相似文献   
6.
7.
The pervasive involvement of information and communication technologies and computers in our daily lives influences changes of attitude toward computers. We focused on finding these ecological effects in the differences in computer attitudes as a function of gender and age. A questionnaire with 34 Likert-type items was used in our research. The sample consisted of 659 students from 14 high schools, aged 15–19 years attending the first, the second, the third, and the fourth years of study. The results of the questionnaire were divided into the two dimensions of concrete computer enjoyment and computer anxiety. On the first dimension both younger students and girls have positive attitudes. On the second dimension both younger students and boys have more positive attitudes. Overall, girls have more positive attitudes than boys. This is interesting because in the existing literature there is evidence that boys have more positive attitudes toward computers than girls. Perhaps a change is taking place.  相似文献   
8.
Determination of amyloid β (Aβ) isoforms and in particular the proportion of the Aβ 1-42 isoform in cerebrospinal fluid (CSF) of patients suspected of Alzheimer’s disease might help in early diagnosis and treatment of that illness. Due to the low concentration of Aβ peptides in biological fluids, a preconcentration step prior to the detection step is often necessary. This study utilized on-chip immunoprecipitation, known as micro-immunoprecipitation (μIP). The technique uses an immunosorbent (IS) consisting of magnetic beads coated with specific anti-Aβ antibodies organized into an affinity microcolumn by a magnetic field. Our goal was to thoroughly describe the critical steps in developing the IS, such as selecting the proper beads and anti-Aβ antibodies, as well as optimizing the immobilization technique and μIP protocol. The latter includes selecting optimal elution conditions. Furthermore, we demonstrate the efficiency of anti-Aβ IS for μIP and specific capture of 5 Aβ peptides under optimized conditions using various subsequent analytical methods, including matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS), capillary electrophoresis, microchip electrophoresis, and immunoblotting. Synthetic Aβ peptides samples prepared in buffer and spiked in human CSF were analyzed. Finally, on-chip immunoprecipitation of Aβ peptides in human CSF sample was performed.  相似文献   
1
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号