scholarly journals Understanding Early Elementary Children's Conceptual Knowledge of Plant Structure and Function through Drawings

2014 ◽  
Vol 13 (3) ◽  
pp. 375-386 ◽  
Author(s):  
Janice L. Anderson ◽  
Jane P. Ellis ◽  
Alan M. Jones
Keyword(s):  
United States ◽  
Conceptual Understanding ◽  
Conceptual Knowledge ◽  
Southeastern United States ◽  
Structure And Function ◽  
Plant Structure ◽  
Children's Drawings ◽  
Wide Range ◽  
Children’S Drawings ◽  
And Function

This study examined children's drawings to explain children's conceptual understanding of plant structure and function. The study explored whether the children's drawings accurately reflect their conceptual understanding about plants in a manner that can be interpreted by others. Drawing, survey, interview, and observational data were collected from 182 students in grades K and 1 in rural southeastern United States. Results demonstrated the children held a wide range of conceptions concerning plant structure and function. These young children held very simple ideas about plants with respect to both their structure and function. Consistent with the drawings, the interviews presented similar findings.

Introduction

2019 ◽  
pp. 1-14
Author(s):  
Aaron Deter-Wolf ◽  
Tanya M. Peres
Keyword(s):  
United States ◽  
Southeastern United States ◽  
River Valley ◽  
Short Overview ◽  
The Creation ◽  
Cumberland River ◽  
And Function ◽  
Culture Phase

This introduction presents a brief geologic overview of the Middle Cumberland River Valley of Tennessee. It describes the research interests that culminated in the creation of this volume and positions the volume within the overall context of Archaic shell-bearing site excavations in the Southeastern United States and the Shell Mound Archaic culture phase. The introduction further summarizes the prevailing theories as to the creation and function of Archaic shell-bearing sites which have been generated by research in other regions of the coastal and interior Southeast. Finally, it presents a short overview of the contributed chapters.

scholarly journals Regulation of OmpA Translation and Shigella dysenteriae Virulence by an RNA Thermometer

2019 ◽  
Vol 88 (3) ◽  
Author(s):  
Erin R. Murphy ◽  
Johanna Roßmanith ◽  
Jacob Sieg ◽  
Megan E. Fris ◽  
Hebaallaha Hussein ◽  
...  
Keyword(s):  
In Silico ◽  
Bacterial Species ◽  
Regulation Of Gene Expression ◽  
Structure And Function ◽  
Shigella Dysenteriae ◽  
Content Type ◽  
Bacterial Physiology ◽  
Wide Range ◽  
Rna Thermometer ◽  
And Function

ABSTRACT RNA thermometers are cis-acting riboregulators that mediate the posttranscriptional regulation of gene expression in response to environmental temperature. Such regulation is conferred by temperature-responsive structural changes within the RNA thermometer that directly result in differential ribosomal binding to the regulated transcript. The significance of RNA thermometers in controlling bacterial physiology and pathogenesis is becoming increasingly clear. This study combines in silico, molecular genetics, and biochemical analyses to characterize both the structure and function of a newly identified RNA thermometer within the ompA transcript of Shigella dysenteriae. First identified by in silico structural predictions, genetic analyses have demonstrated that the ompA RNA thermometer is a functional riboregulator sufficient to confer posttranscriptional temperature-dependent regulation, with optimal expression observed at the host-associated temperature of 37°C. Structural studies and ribosomal binding analyses have revealed both increased exposure of the ribosomal binding site and increased ribosomal binding to the ompA transcript at permissive temperatures. The introduction of site-specific mutations predicted to alter the temperature responsiveness of the ompA RNA thermometer has predictable consequences for both the structure and function of the regulatory element. Finally, in vitro tissue culture-based analyses implicate the ompA RNA thermometer as a bona fide S. dysenteriae virulence factor in this bacterial pathogen. Given that ompA is highly conserved among Gram-negative pathogens, these studies not only provide insight into the significance of riboregulation in controlling Shigella virulence, but they also have the potential to facilitate further understanding of the physiology and/or pathogenesis of a wide range of bacterial species.

Commentary on “Reflections on culture, structure and function of an intensive support service centred on positive behavioural support”

2016 ◽  
Vol 21 (4) ◽  
pp. 212-219 ◽  
Author(s):  
Sandy Toogood
Keyword(s):  
Support Service ◽  
Structure And Function ◽  
Content Type ◽  
Behavioural Support ◽  
Wide Range ◽  
Service Models ◽  
History Of ◽  
Positive Behaviour Support ◽  
The Uk ◽  
And Function

Purpose The purpose of this paper is to provide a commentary on Patterson and Berry’s paper “Reflections on culture, structure and function of an intensive support service centred on positive behavioural support”. Design/methodology/approach This paper reviews key ideas presented in Patterson and Berry’s article relative to the recent history of service delivery in the UK and the growing interest being shown in positive behaviour support. Findings Patterson and Berry’s article adds to a modest literature on specialist support services and should stimulate further descriptions of service models and the concepts underpinning them. Originality/value The literature on specialist support service models is limited and this addition should be relevant to a wide range of clinicians, consumers and commissioners.

Functional Considerations of Warfare in the Southeast during The Mississippi Period

1972 ◽  
Vol 37 (3) ◽  
pp. 383-392 ◽  
Author(s):  
Lewis H. Larson
Keyword(s):  
United States ◽  
Southeastern United States ◽  
Arable Land ◽  
Cultural Pattern ◽  
And Function

AbstractDuring the last purely aboriginal period in the southeastern United States, most, if not all, of the settlements in the interior areas were fortified, implying a cultural pattern of extensive warfare. This paper examines the nature and function of defensive works protecting the sites and advances the hypothesis that warfare at this time resulted from competition for arable land.

scholarly journals Analisis dan Rekonstruksi Komponen Penyusun Lembar Kerja Peserta Didik Struktur dan Fungsi Jaringan Tumbuhan

BIODIK ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 82-94
Author(s):  
Nadia Nadia ◽  
Bambang Supriatno ◽  
Sri Anggraeni
Keyword(s):  
Plant Tissue ◽  
Knowledge Construction ◽  
Data Interpretation ◽  
Practical Aspect ◽  
Structure And Function ◽  
Plant Structure ◽  
Laboratory Activity ◽  
Conceptual Aspect ◽  
Teachers And Students ◽  
And Function

Student worksheets are guidelines used by teachers and students in practicum activities. This study aims to analyze and reconstruct the students worksheets are less qualified and not in accordance with established standards. This research is a descriptive qualitative analysis research which aims to analyze and reconstruct student worksheets with the 1)Analysis; 2)Try; 3)Reconstruction stage. The analysis was conducted on 6 student worksheet on Plant Network Structure and Function based on the KTSP Curriculum and 2013 Curriculum using the Laboratory Activity Analysis Form instrument and the Vee Diagram scoring table. The trial was conducted at the FPMIPA Plant Structure Laboratory, Universitas Pendidikan Indonesia. Student worksheets  reconstruction is based on the problems found in the conceptual, practical and knowledge construction aspects after analysis and testing. The results showed that there were problems with student worksheets  in the Structure and Function of Plant Tissue from conceptual, practical and knowledge construction aspects. In the conceptual aspect, for the suitability of competence with Basic Competence and suitability of activities with the cognitive level of students, the percentage is only 16.6%. In the practical aspect 66.7% of the student worksheets  analyzed the procedure incorrectly so that the phenomenon objects that appear are not relevant to the objectives / titles of student worksheets . In the aspect of knowledge construction 66.6% of student worksheets  analyzed the questions can be answered without doing practicum and there are no questions about data interpretation, the emergence of a principle and analysis so that drawing conclusions is not based on facts and does not describe the title/purpose. Based on the acquisition of component scores Diagram Vee student worksheets  Structure and Function of Plant Tissue has not reached an ideal score (18). The Vee Diagram component that does not appear at all is knowledge claims (score 0). Abstrak. Lembar kerja siswa merupakan pedoman yang digunakan oleh guru dan siswa dalam kegiatan praktikum. Penelitian ini bertujuan untuk menganalisis dan merekontruksi lembar kerja siswa yang kurang berkualitas dan tidak sesuai dengan standar yang telah ditetapkan. Penelitian ini merupakan penelitian analisis deskriptif kualitatif yang bertujuan untuk menganalisis dan merekontruksi lembar kerja siswa dengan metode ANCOR (Analisis-Coba-Rekontruksi). Analisis dilakukan pada 6 LKS Struktur dan Fungsi Jaringan Tumbuhan berdasarkan Kurikulum KTSP dan Kurikulum 2013 menggunakan instrumen Form Analisis Kegiatan Laboratorium dan tabel penskoran Diagram Vee. Uji coba dilakukan di Laboratorium Struktur Tumbuhan FPMIPA Universitas Pendidikan Indonesia. Rekontruksi LKS dilakukan berdasarkan permasalahan yang ditemukan pada aspek konseptual, praktikal dan kontruksi pengetahuan setelah melakukan analisis dan ujicoba. Hasil penelitian menunjukkan bahwa terdapat permasalahan pada LKS Struktur dan Fungsi Jaringan Tumbuhan dari aspek konseptual, praktikal dan kontruksi pengetahuan. Pada aspek konseptual, untuk kesesuaian kompetensi dengan Kompetensi Dasar dan kesesuaian kegiatan dengan tingkat kognitif siswa, persentasenya hanya 16,6%. Pada aspek praktikal 66,7% dari LKS yang dianalisis prosedurnya tidak tepat sehingga objek fenomena yang muncul tidak relevan dengan tujuan/judul LKS. Pada aspek kontruksi pengetahuan 66,6% dari LKS yang dianalisis pertanyaannya dapat dijawab tanpa melakukan praktikum dan tidak ada pertanyaan mengenai interpretasi data, kemunculan suatu prinsip dan analisis sehingga penarikan kesimpulan tidak berdasarkan fakta dan tidak menggambarkan judul/tujuan. Berdasarkan perolehan skor komponen Diagram Vee LKS Struktur dan Fungsi Jaringan Tumbuhan belum mencapai skor ideal (18). Komponen Diagram Vee yang tidak muncul sama sekali adalah klaim pengetahuan (skor 0).

scholarly journals Structure and function of the immune system in the spleen

2019 ◽  
Vol 4 (33) ◽  
pp. eaau6085 ◽  
Author(s):  
Steven M. Lewis ◽  
Adam Williams ◽  
Stephanie C. Eisenbarth
Keyword(s):  
Cell Types ◽  
Structure And Function ◽  
Lymphoid Organ ◽  
The Body ◽  
Human Spleen ◽  
Cell Clearance ◽  
Wide Range ◽  
Abnormal Cells ◽  
Cell Organization ◽  
And Function

The spleen is the largest secondary lymphoid organ in the body and, as such, hosts a wide range of immunologic functions alongside its roles in hematopoiesis and red blood cell clearance. The physical organization of the spleen allows it to filter blood of pathogens and abnormal cells and facilitate low-probability interactions between antigen-presenting cells (APCs) and cognate lymphocytes. APCs specific to the spleen regulate the T and B cell response to these antigenic targets in the blood. This review will focus on cell types, cell organization, and immunologic functions specific to the spleen and how these affect initiation of adaptive immunity to systemic blood-borne antigens. Potential differences in structure and function between mouse and human spleen will also be discussed.

scholarly journals Biosynthesis of Polyketides in Streptomyces

2019 ◽  
Vol 7 (5) ◽  
pp. 124 ◽  
Author(s):  
Chandra Risdian ◽  
Tjandrawati Mozef ◽  
Joachim Wink
Keyword(s):  
Secondary Metabolites ◽  
Structure And Function ◽  
Polyketide Synthases ◽  
Type I ◽  
Type Ii ◽  
Filamentous Form ◽  
Gram Positive Bacteria ◽  
Wide Range ◽  
Different Types ◽  
And Function

Polyketides are a large group of secondary metabolites that have notable variety in their structure and function. Polyketides exhibit a wide range of bioactivities such as antibacterial, antifungal, anticancer, antiviral, immune-suppressing, anti-cholesterol, and anti-inflammatory activity. Naturally, they are found in bacteria, fungi, plants, protists, insects, mollusks, and sponges. Streptomyces is a genus of Gram-positive bacteria that has a filamentous form like fungi. This genus is best known as one of the polyketides producers. Some examples of polyketides produced by Streptomyces are rapamycin, oleandomycin, actinorhodin, daunorubicin, and caprazamycin. Biosynthesis of polyketides involves a group of enzyme activities called polyketide synthases (PKSs). There are three types of PKSs (type I, type II, and type III) in Streptomyces responsible for producing polyketides. This paper focuses on the biosynthesis of polyketides in Streptomyces with three structurally-different types of PKSs.

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