Physical Sciences and Mathematics Commons^™

The Activities And Aspirations Of The Estonian Grassland Society, A. Selge, R. Viiralt, Tiina Köster

IGC Proceedings (1997-2023)

The aim of the Estonian Grassland Society (EGS) is to develop the flow of grassland-based knowledge between different stakeholders and multidisciplinary research and to create international contacts. The EGS is a non-profit organisation and more than 100 interdisciplinary researchers, plant breeders, advisors and farmers are actively involved in the work of the society. The interdisciplinary activities are becoming more and more attractive and important and bring together different target groups. At present seminars, which are focused on the adaptation producers to the EU rules and support system for farmers are attractive. Nowadays the essential goal for the EGS is to …

From Mirrors To Wallpapers: A Virtual Math Circle Module On Symmetry, Nicole A. Sullivant, Christina L. Duron, Douglas T. Pfeffer

Journal of Math Circles

Symmetry is a natural property that children see in their everyday lives; it also has deep mathematical connections to areas like tiling and objects like wallpaper groups. The Tucson Math Circle (TMC) presents a 7-part module on symmetry that starts with reflective symmetry and culminates in the deconstruction of wallpapers into their ‘generating tiles’. This module utilizes a scaffolded, hands-on approach to cover old and new mathematical topics with various interactive activities; all activities are made available through free web-based platforms. In this paper, we provide lesson plans for the various activities used, and discuss their online implementation with Zoom, …

Mining The Soma Cube For Gems: Isomorphic Subgraphs Reveal Equivalence Classes, Edward Vogel, My Tram

Journal of Humanistic Mathematics

Soma cubes are an example of a dissection puzzle, where an object is broken down into pieces, which must then be reassembled to form either the original shape or some new design. In this paper, we present some interesting discoveries regarding the Soma Cube. Equivalence classes form aesthetically pleasing shapes in the solution set of the puzzle. These gems are identified by subgraph isomorphisms using SNAP!/Edgy, a simple block-based computer programming language. Our preliminary findings offer several opportunities for researchers from middle school to undergraduate to utilize graphs, group theory, topology, and computer science to discover connections between computation and …

Plant Wise, Sophia Llamas

Honors Projects

Conceptually, Plant Wise is the key to bridging the gap between preconceived ideas about vegan and vegetarianism and successfully integrating plant-based foods into your everyday life. Physically, Plant Wise is a self-educational, interactive booklet chock-full of activities intended for users to complete at their own pace. Inside this 56-page booklet, there are recipes, doodling spaces, weekly check sheets, activities to do with friends and family, challenges, and so much more. Plant Wise utilizes these activities and journaling opportunities throughout as a self-reflective vehicle to give users an experience to reflect on, which aids in the retention of what’s been learned …

In-Class Activities For Openstax Astronomy, Rosa Williams, Kimberly Shaw

Physics and Astronomy Ancillary Materials

This set of in-class activities in Microsoft Word format are intended to supplement OpenStax Astronomy. Topics include:

• Atmospheric Gas
• Celestial Sphere
• Dwarf Planets
• Earth Size
• Earth Impact
• Greenhouse Gases and Climate Change
• Jovian Planet
• Jovian Moon and Ring
• Mars Atmosphere and Climate
• Solar System Formation and Scale
• Sunspots
• Terrestrial Planet and Lunar Features
• Venus Atmosphere and Climate

Mathamigos: A Community Mathematics Initiative, James C. Taylor, Delara Sharma, Shannon Rogers

Journal of Math Circles

We present a broad, and we think novel, community mathematics initiative in its early stages in Santa Fe, New Mexico. At every level, the program embraces community-wide collaboration—from the leadership team, to the elements of the mathematics being implemented (primarily math circles and the Global Math Project’s Exploding Dots), to the funding model. Our MathAmigos program falls within two categories of math circle-related programs: outreach and professional development (PD). In outreach, we work with the Santa Fe Public School district (administration, teachers, students, and parents) and the City of Santa Fe government (our funders via a two-year contract) in …

Enhancing Watershed Planning In Implementation Of The Colorado Water Plan: An Overview Of Implementation Challenges And Opportunities, Douglas S. Kenney

Books, Reports, and Studies

25 pages.

Introduction -- Review of existing efforts -- Summary of interviews -- The salience of funding -- Recommendations -- Attachment A: Summary of reviewed watershed plans.

A Critique Of A Student-Centered Learning Approach Used In A Geometry Classroom, Alana Blackwell Day

LSU Master's Theses

This thesis offers a framework for identifying effective classroom materials to support student-centered learning. Based on a review of published studies on effective classroom activities, as well as theses by Louisiana Math and Science Teachers Institute (LaMSTI) graduates, we identify promising characteristics. We employed these in five lessons, refined them into questions, and offer in final form for use.

Structures, Biological Activities And Phylogenetic Relationships Of Terpenoids From Marine Ciliates Of The Genus Euplotes, Graziano Guella, Danielle Skropeta, Graziano Di Giuseppe, Fernando Dini

Danielle Skropeta

In the last two decades, large scale axenic cell cultures of the marine species comprising the family Euplotidae have resulted in the isolation of several new classes of terpenoids with unprecedented carbon skeletons including the (i) euplotins, highly strained acetylated sesquiterpene hemiacetals; (ii) raikovenals, built on the bicyclo[3.2.0]heptane ring system; (iii) rarisetenolides and focardins containing an octahydroazulene moiety; and (iv) vannusals, with a unique C-30 backbone. Their complex structures have been elucidated through a combination of nuclear magnetic resonance spectroscopy, mass spectrometry, molecular mechanics and quantum chemical calculations. Despite the limited number of biosynthetic experiments having been performed, the large …

Cytotoxic And Anticancer Activities Of Isatin And Its Derivatives: A Comprehensive Review From 2000-2008, Marie Ranson, Danielle Skropeta, Julie Locke, Lidia Matesic, Kara Perrow

Danielle Skropeta

No abstract provided.

How Nursing Staff Spend Their Time On Activities In A Nursing Home: An Observational Study, Esther Munyisia, Ping Yu, David Hailey

Dr Ping Yu

AIM: This article is a report of a study to examine how nursing staff spend their time on activities in a nursing home. BACKGROUND: Few studies have investigated how nursing staff spend their time on activities in a nursing home. Such information is important for nurse managers in deciding on staff deployment, and for evaluating the effects of changes in nursing practice. METHOD: A work sampling study with an observational component was undertaken in 2009 with nursing staff at a nursing home. RESULTS: A total of 430 activities were recorded for Registered Nurses, 331 for Endorsed Enrolled Nurses, 5276 for …

Development And Testing Of A Work Measurement Tool To Assess Caregivers' Activities In Residential Aged Care Facilities, Esther Munyisia, Ping Yu, David Hailey

Dr Ping Yu

The introduction of computerized information systems into health care practices may cause changes to the way healthcare workers conduct their routine work activities, such as work flow and the time spend on each activity. To date the available work measurement tools are confined to activities in hospitals and do not cover residential aged care facilities (RACFs). There is little evidence about the effects of technology on caregivers' work practices, including the distribution of time on activities in a RACF. This requires the measurement of caregivers' activities using a valid and reliable measurement tool. The contribution of this research is to …

Nmr Spectroscopy Of 14-3-3zeta Reveals A Flexible C-Terminal Extension: Differentiation Of The Chaperone And Phosphoserine-Binding Activities Of 14-3-3zeta, H Fu, Danielle Williams, Heath Ecroyd, John Carver, Lixin Zhang, Huanqin Dai, Joanna Woodcock, K Goodwin

Heath Ecroyd

Intracellular 14-3-3 proteins bind to many proteins, via a specific phosphoserine motif, regulating diverse cellular tasks including cell signalling and disease progression. The 14-3-3 isoform is a molecular chaperone, preventing the stressinduced aggregation of target proteins in a manner comparable with that of the unrelated sHsps (small heat-shock proteins). 1H-NMR spectroscopy revealed the presence of a flexible and unstructured C-terminal extension, 12 amino acids in length, which protrudes from the domain core of 14-3-3 and is similar in structure and length to the C-terminal extension of mammalian sHsps. The extension stabilizes 14-3-3, but has no direct role in chaperone action. …

Comparison Of Chemical Constituents And Antibacterial Activities And Antioxidant Activities Of The Essential Oil From Leaves And Fruits Of Bridelia Retusa (L.) A. Juss, D Sanseera, W Niwatananun, Saisunee Liawruangrath, Apiwat Baramee, Banyong Khantawa, Stephen G. Pyne, Boonsom Liawruangrath

Faculty of Science - Papers (Archive)

The essential oils from the leaves and fruits of Bridelia retusa (L.) A.Juss. were isolated by hydrodistillation. The essential oils were obtained in 0.0013% yield as a pale yellow liquid and 0.0026% yield as a violet-light brown liquid for the leaf oil and fruit oil respectively. The composition of each essential oil was analysed by means of GC-(FID) and GC-MS. Eleven constituents accounting for 48.77% of total leaves oil were identified. The most abundant compound was phytol (33.4%), followed by phthalic acid (5.2%), 6, 13-dimethoxy-2, 3, 9, 10-tetramethylpentacene-1, 4, 8, 11-tetrone (3.4%), heptacosane (2.3%) and nonacosane (1.2%). Sixteen constituents accounting …

Antimalarial, Anticancer, Antimicrobial Activities And Chemical Constituents Of Essential Oil From The Aerial Parts Of Cyperus Kyllingia Endl, Stephen G. Pyne, Boonsom Liawruangrath, Saisunee Liawruangrath, M Garson, S Khamsan, A Teerawutkulrag

Faculty of Science - Papers (Archive)

The chemical constituents of the essential oil from Cyperus kyllingia Endl. were analyzed by a GC, GC-MS. Twenty-three compounds were identified, accounting for 93.75% of the total oil that consisted mainly of oxygenated sesquiterpenes (53.52%), particularly sesquiterpene hydrocarbons (38.97%), and carboxylic acid (1.26%). The most representative compounds were -cadinol (19.32%), caryophyllene oxide (12.17%), -muurolol (11.58%), -humulene (9.85%), and -atlantone (6.07%). The oil showed significant activities against Plasmodium falcipalum (K1, multi drug resistant strain) and NCI-H187 (Small Cell Lung Cancer) with the IC50 values of 7.52 and 7.72 g/mL, respectively. The oil exhibited highly active against Staphylococcus aureus ATCC25923 and moderately …

Development And Testing Of A Work Measurement Tool To Assess Caregivers' Activities In Residential Aged Care Facilities, Esther Munyisia, Ping Yu, David Hailey

Faculty of Informatics - Papers (Archive)

The introduction of computerized information systems into health care practices may cause changes to the way healthcare workers conduct their routine work activities, such as work flow and the time spend on each activity. To date the available work measurement tools are confined to activities in hospitals and do not cover residential aged care facilities (RACFs). There is little evidence about the effects of technology on caregivers' work practices, including the distribution of time on activities in a RACF. This requires the measurement of caregivers' activities using a valid and reliable measurement tool. The contribution of this research is to …

Structures, Biological Activities And Phylogenetic Relationships Of Terpenoids From Marine Ciliates Of The Genus Euplotes, Graziano Guella, Danielle Skropeta, Graziano Di Giuseppe, Fernando Dini

Faculty of Science - Papers (Archive)

In the last two decades, large scale axenic cell cultures of the marine species comprising the family Euplotidae have resulted in the isolation of several new classes of terpenoids with unprecedented carbon skeletons including the (i) euplotins, highly strained acetylated sesquiterpene hemiacetals; (ii) raikovenals, built on the bicyclo[3.2.0]heptane ring system; (iii) rarisetenolides and focardins containing an octahydroazulene moiety; and (iv) vannusals, with a unique C-30 backbone. Their complex structures have been elucidated through a combination of nuclear magnetic resonance spectroscopy, mass spectrometry, molecular mechanics and quantum chemical calculations. Despite the limited number of biosynthetic experiments having been performed, the large …

Synthesis Of Novel 3'-Spirocyclic-Oxindole Derivatives And Assessment Of Their Cytostatic Activities, Sarah Yong, Alison T. Ung, Stephen G. Pyne, Brian W. Skelton, Allan H. White

Faculty of Science - Papers (Archive)

The synthesis of some novel 3′-spirocyclic-oxindole compounds, based on the spiro[indole-3,5′-isoxazolidin]-2(1H)-one, the 2′H-spiro[indole-3,6′-[1,3]oxazinane]-2,2′(1H)-dione and the 2′H-spiro[indoline-3,3′-pyrrolo[1,2-c][1,3′]oxazine]-1′,2(1H)-dione heterocyclic structures, is described. These compounds were prepared from methyl α-(2-nitrophenyl)acrylate via [1,3]-dipolar cycloaddition reactions with two acyclic nitrones and one cyclic nitrone followed by reduction of the cycloadducts and then treatment with triphosgene. Two of these compounds showed significant cytostatic activity on three cancer cell lines with GI₅₀ values of 2.6–4.1 μM on the human breast cancer cell line, MCF-7.

The Synthesis Of 2',2'-Bis-Benzylisoquinolines And Their Cytostatic Activities, Stephen R. Taylor, Alison T. Ung, Stephen G. Pyne

Faculty of Science - Papers (Archive)

The novel laudanosine dimers in which two laudanosine units are linked via a C-2′ biaryl bond have been prepared by a sequence that involves formation of the biaryl bond first and then formation of the isoquinoline rings. Two of these compounds showed higher cytostatic activity on three cancer cell lines than thalicarpine.

The Enhancement Of Earth Science Laboratories And Activities Through Inquiry, Discovery And Hands-On Methods, Diane Hinchliff Hesse

All Graduate Projects

The central objective of this project is to enhance the middle school eighthgrade Earth Science curriculum by developing or adapting existing laboratory activities to model hands-on, inquiry, and discovery learning methods. These laboratory activities are designed to encourage independent student-centered learning as opposed to teacher-centered and directed activities.

The project also explored the nature of the science laboratory as it exists in classrooms today and how it can be improved through an understanding of the nature and process of science.

Visual Impacts Of Forest Management Activities: Findings On Public Preferences, United States Department Of Agriculture, Forest Service

Forestry

A major concern of forest land managers is the visual impact that activities such as timber harvest, road building, and mining have on the forest landscape. Management of the visual resource is a regular part of planning on National Forests, and many other public and private forest land managers are increasing their efforts to protect and enhance this resource. The Forest Residue and Harvesting Research Program at the Intermountain Station includes studies of the impact of harvest and roading activities on visual quality. Preliminary results were reported earlier (Schweitzer, Ullrich, and Benson 1976). This report updates earlier findings and presents …

The Activities Of The Education And Training Group Of The Analytical Division Of The Chemical Society, D. Thorburn Burns, Julian Tyson

Chemistry Department Faculty Publication Series

No abstract provided.