A Hundred Years of Stereochemistry?The Principal Development Phases in Retrospect

The purpose of this study was to assess practitioners’ perceived involvement and challenges they encountered in the process of curriculum development in Secondary schools of Amhara Sayintworeda. Mixed research design was employed to provide answer to the basic questions of this research. The sample consisted of 125 secondary school teachers, 3 school principals, 4 vice principals, and 1 supervisor. Proportional random sampling technique was used to select the sample teachers and comprehensive sampling technique was used to select the sample school principals, vice principals, and the supervisor. The data was collected through questionnaire and semi-structured interview. The collected data was analyzed using percentage, one sample t-test and thematic description. The findings indicated low practitioners’ perceived involvement in all the curriculum development phases other than curriculum implementation. Absence of financial and material incentives and practitioners’ lack of motivation were considered as the major inhibiting factors for practitioners’ involvement in the different phases of the curriculum development process. On the basis of the major findings, relevant recommendations are suggested in the paper.

Download Full-text

Variability as normal as apple pie

Linguistics Vanguard ◽

10.1515/lingvan-2020-0034 ◽

2021 ◽

Vol 7 (s2) ◽

Author(s):

Marjolijn Verspoor ◽

Wander Lowie ◽

Kees de Bot

Keyword(s):

Dynamic Systems ◽

Dynamic Systems Theory ◽

Complex Dynamic ◽

Controlled Processes ◽

Complex Dynamic Systems ◽

L2 Development ◽

Limited Degree ◽

Development Phases ◽

Longitudinal Case Studies ◽

Over Time

Abstract In recent studies in second language (L2) development, notably within the focus of Complex Dynamic Systems Theory (CDST), non-systematic variation has been extensively studied as intra-individual variation, which we will refer to as variability. This paper argues that variability is functional and is needed for development. With examples of four longitudinal case studies we hope to show that variability over time provides valuable information about the process of development. Phases of increased variability in linguistic constructions are often a sign that the learner is trying out different constructions, and as such variability can be evidence for change, and change can be learning. Also, a limited degree of variability is inherent in automatic or controlled processes. Conversely, the absence of variability is likely to show that no learning is going on or the system is frozen.

Download Full-text

Longitudinal Characterization of the Gut Bacterial and Fungal Communities in Yaks

Journal of Fungi ◽

10.3390/jof7070559 ◽

2021 ◽

Vol 7 (7) ◽

pp. 559

Author(s):

Yaping Wang ◽

Yuhang Fu ◽

Yuanyuan He ◽

Muhammad Fakhar-e-Alam Kulyar ◽

Mudassar Iqbal ◽

...

Keyword(s):

Natural Aging ◽

Fungal Communities ◽

Significant Shift ◽

Mature Adult ◽

Bacterial Phyla ◽

Development Stages ◽

Composition And Structure ◽

Intestinal Functions ◽

Development Phases

Development phases are important in maturing immune systems, intestinal functions, and metabolism for the construction, structure, and diversity of microbiome in the intestine during the entire life. Characterizing the gut microbiota colonization and succession based on age-dependent effects might be crucial if a microbiota-based therapeutic or disease prevention strategy is adopted. The purpose of this study was to reveal the dynamic distribution of intestinal bacterial and fungal communities across all development stages in yaks. Dynamic changes (a substantial difference) in the structure and composition ratio of the microbial community were observed in yaks that matched the natural aging process from juvenile to natural aging. This study included a significant shift in the abundance and proportion of bacterial phyla (Planctomycetes, Firmicutes, Bacteroidetes, Spirochaetes, Tenericutes, Proteobacteria, and Cyanobacteria) and fungal phyla (Chytridiomycota, Mortierellomycota, Neocallimastigomycota, Ascomycota, and Basidiomycota) across all development stages in yaks. As yaks grew older, variation reduced, and diversity increased as compared to young yaks. In addition, the intestine was colonized by a succession of microbiomes that coalesced into a more mature adult, including Ruminococcaceae_UCG-005, Romboutsia, Prevotellaceae_UCG-004, Blautia, Clostridium_sensu_stricto_1, Ruminococcus_1, Ruminiclostridium_5, Rikenellaceae_RC9_gut_group, Alloprevotella, Acetitomaculum, Lachnospiraceae_NK3A20_group, Bacteroides, Treponema_2, Olsenella, Escherichia-Shigella, Candidatus_Saccharimonas, and fungal communities Mortierella, Lomentospora, Orpinomyces, and Saccharomyces. In addition, microorganisms that threaten health, such as Escherichia-Shigella, Mortierella, Lomentospora and Hydrogenoanaerobacterium, Corynebacterium_1, Trichosporon, and Coprinellus, were enriched in young and old yaks, respectively, although all yaks were healthy. The significant shifts in microflora composition and structure might reflect adaptation of gut microbiome, which is associated with physicochemical conditions changes and substrate availability in the gut across all development periods of yaks.

Download Full-text