Digital Commons Network^™

Defining Gcte Modelling Needs For Pastures And Rangelands, Bruce Campbell, Mark Stafford Smith

IGC Proceedings (1977-2023)

A short workshop was held at the Climate Change session of the XVII International Grassland Congress (JGC - New Zealand, February 1993) under the auspices of the Internntional Geosphere-B iosphere Programme (IGBP) Global Change and Terrestrial Ecosystem (GCTE) core project. The workshop was chaired by the Head of IGBP-GCTE, Dr Brian Walker, and was attended by 50 people. This report outlines discussions from the workshop and is supplemented with material from the GCTE Operational Plan and some other sources, and comments from other researchers unable to attend the workshop. Draft workplans for modelling pastures and rangelands under GCTE have been …

Genetics Of Fibre Degradation In The Rumen, Particularly In Relation To Anaerobic Fungi, And Its Modification By Recombinant Dna Technology, C G. Orpin, G Xue

IGC Proceedings (1977-2023)

A number of rumen bacteria, fungi and protozoa are involved in fibre digestion in the rumen. Recombinant DNA technology bas allowed the isolation and characterisation of key genes coding for several enzymes involved in fibre degradation. The main species that have been examined are the bacteria Ruminococcus spp., Fibrobacter succinogenes and the anaerobic fungus Neocallimastix patriciarum. Genes coding for endo--1,4-glucanases and xylanase are common amongst all these organisms, but we will concentrate on recent advances in the genetics of plant fibre digestion by N. patriciarum, which contains genes coding for relatively high level activity exo- 1,4-glucanase which may …

Molecular Basis Of Legume-Rhizobium Interactions: Potentials For Improving Symbiotic Nitrogen Fixation, Adam Kondorosi, Michael Schultze, Beate Hoffmann, Csaba Koncz, Laszlo Bogre, Michele Cren, Ilona Dusha, Denes Dudits, Eva Kondorosi

IGC Proceedings (1977-2023)

The establishment of nit.rogen-fixing symbiosis between rhizobia and their plant hosls requires multiple interactions between the two pnrtners, which involves transmission of signal molecules activating gene sets controlling nodule development. Plant roots exude specific Oavonoids which can induce the expression of the nodulation (nod) genes in the appropriate bacterium partner, in conjunction with the constitutively produced activator protein NodD. Additional positive and negative regulatory factors further modulate nod gene expression and this fine tuning of 110d gene expression is required for optimal nodulation of the hosts. Some of these factors mediate the effects of some soil factors, such as (he …

Effects Of Vesicular-Arbuscular Mycorrhiza Inoculation, Nitrogen And Phosphorus On The Growth Of Seedlings Of Sesbania Sesban, E Akeampong, T Mamo

IGC Proceedings (1977-2023)

In the first of two pot experiments, growth of seedlings of Sesbania sesban in response to rates of P (0, 40, 120, 160 and 200 kg/ha) and of N (0 11nd 100 kg/ha) was examined. In a second trial the effect of inoculation with vesicular-arbuscular mycorrhiza (Glomus macrocarpus) and 2 levels (0 and 40 kg/hn) each of triple superphosphnte (TSP) and Egyptian rock phosphate (ERP) were studied. Response to P was linear to 80 kg/ha. Application of N improved the response of seedlings to P through enhanced P and N uptake. Application of N increased plant weight by …

Isolation Of A Multi-Functional Cellulase Cdna (Cele) From The Rumen Fungus Neocallimastix Patriciarum, Gang Ping Xue, K S. Gobius, C G. Orpin

IGC Proceedings (1977-2023)

A cellulase cDNA, ce/E, was isolated from a cellulose-induced cDNA library of the rumen fungus Neocallimastix patriciarum by screening for hydrolysis of carboxymethyl cellulose. In addition to its ability to hydrolyse carboxymethyl cellulose, ce/E enzyme was also able to degrade microcrystalline cellulose, methylumbelliferyl cellobioside, p-nitrophenyl cellobioside, lichenan and xylan. These data suggest that ce/E encodes a multi-functional cellulase.

Cellobiohydrolase (Cbh) From Neocallimastix Patriciarum: A Membrane Associated Complex?, J H. Alyward, Gang Ping Xue, G D. Simpson, C G. Orpin

IGC Proceedings (1977-2023)

Three cellobiohydrolases were highly puriried from the rumen fungus Neocallimastix patriciarun. Two of these enzymes were liberated from insoluble material by extraction with the non-ionic detergent Triton X-114, requiring the presence of detergent or dissociating agent throughout their purification. The native cellobiohydrolase is probably membrane associated.

Effect Of Nitrogen Application On Symbiotic Nitrogen Fixation Of White Clover Ecotypes Collected In North-Eastern Japan, K Sugawara, A Nishiwaki, Y Yashima

IGC Proceedings (1977-2023)

Escaped plants of white clover which could not be identified by variety were collected and were grown in pots filled with a perlite contained nutrient solution in a growlh chamber. On 16 of the collecled plants, the change of the nitrogenase activity by treatments with or without nitrogen (20 ppm N, NaNO3) was measured by gas chromatogrnphy and the variation of peroxidase isozyme was analysed by means of slab acrylamide gel electrophoresis. The studied plants of white clover (Trifolium repens L.) were classified into 5 types by the response pattern of nitrogenase to N applied. Six bands showing peroxidase …

Symbiotic Characterization Of Azide-Resistant Mutants Of Rhizobium Leguminosarum By Trifolii, Shashi Bhushan Sharma, K Sakadevan, R Corner

IGC Proceedings (1977-2023)

Azide-resistant mutants of Rhizobium legumnosarum bv, trifolii strain NZPS61 were isolated. Mutations conferring azide resistance appeared at a frequency of 1.6x t0·7 on minimal media containing 25 µglml sodium azide. Two classes of mutants were observed with respect to the nitrogen source in the growth media. Mutants in the first class showed azide resistance in the presence of both nitrate and ammonia whereas the mutants in the second class showed azide resistance only in the presence of nitrate. Eleven azide-resistant mutants were characterised for their symbiotic ability with white clover. All the mutants were similar to their parent strain NZPS61 …

Intake Of South African Mutton Merino Ewes On Wheat Stubble Grazing, T S. Brand, J M. Van Heerden, F Franck

IGC Proceedings (1977-2023)

Wheat stubble was grazed continuously for 154 days during the summer (December-April) by reproducing and dry ewes (n-8) at 2 stocking rates ( 1 or 2 ewes/ha), Samples were collected for chemical analysis from oesophageally fistulated (OF) sheep. Intake was determined using controlled chromium-release devices. The mean CP, ADF and NDF contents and iii vitro OM digestibility of samples were respectively 16.1:t0.4%; 40.7:t0.8%, 59.0:tl.1% and 48.5±0.7% t 1 ewe/ha and 10.8±1.1%; 53.9±1.1%, 72.1±0.9% and 48.8:t0.7% at 2 ewes/ha. The mean CP intake of dry ewes was 202±7 g/day (I ewe/ha) and 113:t6 g/day (2 ewes/ha), while the CP intake of …

Earthworms In Pastoral Soils Of Northland, New Zealand, P W. Woods, A.R J. Christie, J N. Couchman

IGC Proceedings (1977-2023)

Earthworm populations were surveyed in 4S pastures in Northland, New Zealand. Both sheep and beef, and dairying properties were sampled during late winter. European liumbricid earthworm species encountered were Aporrectodea caliginosa, A. trapezoides, A. rosea, A. longa, Lumbricus rubellus, L. terrestris, L. castaneus and Octolasion cyaneum. Amynthas diffringens, a megascolecid of Asian origin, was also found. Three native megascolecid species were found under developed pasture. Shallow burrowing species such as Lumbricus rubellus and A. caliginosa were the most frequently encountered species, being present on 91% and 89% of sites, respectively. A. caliginosa was the main contributor to earthworm biomass. …

First Results On Growth Rates Of The Endophytic Fungi Acremonium And Epichloe On Solid And Liquid Media, P Dapprich, A Klose, V H. Paul

IGC Proceedings (1977-2023)

Growth rates of the ·grass endophytes Acrenonium lolii Latch, Christensen and Samuels, A. coenoplrialiim Morgan-Jones lind Garns and Epichloe typhina' (Fries) Tulasne were measured on different solid media under various conditions and in liquid medium. A. coenophiallum and E. ryphina developed best vegetative growth at 25°C in the dark ori;pofato-dextrose-ilgar (PDA) and on minimal­medium (MM), respectively. A: lo/ii grew best at 2coenophialum and E. typhina produced 1.48 g and 6 g FW, respectively. Within 3 days the conductivit)'. reached constant values.· Osmolarity decreased with the increase of biomass. pH rose in cultures of A. lolii and E. typhina …

Discovery Of Gynaephora Ruoergensis Nuclear Polyhedrosis Virus (Grnpv) And Its Use As A Baculovirus Pesticide In Qinghai-Tibet Plateau, Liu Shigui, Yang Zhirong, Wu Tieqiao, Zeng Ying, Cheng Shuqiu

IGC Proceedings (1977-2023)

A new pathogenic virus agent was isolated from the grassland caterpillar Gynaephora rnoergensis, an important pest of grassland in north-western Sichuan. Identification was based on morphological properties, biological characteristics and biochemical studies. It belongs to Subgroup A of the Baculoviridae, and has been named Gynaephora rnoergensis nuclear polyhedrosis virus (GrNPV). A viral pesticide was prepared using GrNPV. It has a killing efficiency of mote than 84.3% to grassland caterpillars, and has been applied for biological control of the pest to 2.3 million ha of grassland in north we��tern Sichuan grassland and the Qinghai-Tibet,plateau.

Infection By Bdellovibrio Bacteriovirus Of Leguminous Forage Rhizobia, Xu Heng, Liu Shigui

IGC Proceedings (1977-2023)

Two bdellovibrio bacteriovirus infecting rhizobia of leguminous forage were isolated from Sichuan-Tibet plateau grassland. The culture characteristics, host range and other biological properties of two bdellovibrio bacterioviruses were researched. Research indicated that the two bdellovibrio bacterioviruses had a wide host range and a strong lyslng ability with Rhlwbium melilotl, R. trlfolll and R, astragalll. 8dellovibrio bacterioviruses affected nodu lation of leguminous forages in grassland, and are one of the main biological factors that lower the yield of leguminous forages.

Studies On The Mutagenicity Of Gynaephora Ruoergensis Nuclear Polyhedrosis Virus (Grnpv), A New Biological Pesticide, Liu Shigui, Wu Yong, Zeng Ying, Wu Tieqiao, Yang Zhirong

IGC Proceedings (1977-2023)

To test pathogenicity and mutagenicity of Gynaepllora ruoergensis nuclear polyhedrosis virus (GrNPV), a new biological pesticide, acute and subacute infection tests were carried out in 366 vertebrates (16 species). Results indicated that GrNPV has no toxicity to vertebrates. No mutagenicity to Salmonela. typhimium . was found using the Ames.test. Four tests using cytogenelic methods, sister chromosome exchange (SCB), chromosome aberration test, a micro-nuclear test of mouse eosinophH cells, and lethal effect tests, indicated no mutagenictic effects to vertebrates.

Survey For Natural Enemies Of Leafy Spurge Of Rangeland In Northern China, Wang Jian Feng

IGC Proceedings (1977-2023)

Leafy spurge (Euphorbia esula L,) is a serious. toxic weed in the real Plains region of lhe USA and Canada where it is toxic to s9me; classes of livestock and displaces more desirable forage plants. Leafy spurge is also spreading widely in Inner Mongolia rangeland, but it does limited damage. Biological weed control scientists from China, USA and Canada have co-operated in a survey for natural enemies of leafy spurge.in Innc Mongolia rangeland where there is an abundant diverse assemblage of insects and pathogens , including: Aphthona , chln ch ichi, Apthona s.eriata, Oberea prob . erythrocephala, Chamaespecia sp. …

A Method For The Greenhouse Evaluation Of Subterranean Clover Breeding Lines For Phytophthora Clandestina Root Rot, S P. Flett, P A. Taylor, V Wakley

IGC Proceedings (1977-2023)

Subterranean clover root rot, caused by Phytophthora clandestina, is a serious disease in both irrigated and dryland pastoral regions of Australia. An Intensive program of screening cultivars and genetic lines of subterranean clover from the National Subterranean Clover Improvement Program (NSCIP) for resistance to root rot caused by Phytophthora clandestina is described, Subterranean clover (Trifolium subterraneum L.) lines, divided into screening runs, were infected with isolates of P. clandestina in a cooled greenhouse and each run required 11 weeks for complete evaluation, Each line was rated for root rot resistance ogainst a standard resistant cv. Larisa and a …

An Interview With Susan Loesl: Pioneering Adaptive Art For Students With Disabilities, Sedigheh Fatollahzadeh Dizaji, Jennifer Elaine Smith

Journal of the Arts and Special Education

Abstract

While art education, which often focuses on skill development, and art therapy, which typically centers more on personal expression and client goals, are two different areas of art, they have many benefits when used together. Susan Loesl is an art therapist and art educator with over 40 years of experience. In this article she shares her expertise in art therapy, art education, and adapting art tools for students with disabilities. Her work highlights the importance of creativity, collaboration, and the need for more art therapists in schools. She also shares advice for those considering careers in art therapy and …

"I Have To Be On Their Side": A Pedagogy Of Kindness, Linda Hoeptner Poling, Juliann B. Dorff

Journal of the Arts and Special Education

The contemporary expectation for visual arts teachers to meet the needs of all learners was explored in this 2011 case study conducted in a secondary visual arts classroom. Exploring ways that care for students manifested, specifically through a pedagogy of kindness, in a classroom designed to meet the needs of students experiencing attention-deficit/hyperactivity disorder (ADHA) and/or autism is revisited and contextualized in our post-COVID reality, where care in education is a central concern. The authors outline how one visual arts educator developed a pedagogy of kindness resulting in the need for specific teacher dispositions. Teacher-student relationships are also discussed within …

Curtains Up - Utilizing Assistive Technology For Inclusive Theater Experiences, Lauren Tucker, Nikki Burnell, Morgan Dalton, Marisa Donenfeld, Catherine Gruszka Vadala

Journal of the Arts and Special Education

Community partnerships can enhance inclusive spaces within the performing arts maximizing the knowledge and expertise within organizations. This article shares the components of a collaboration between a non-profit performing arts venue and a graduate program in assistive technology (AT). Through this affiliation visual and communication supports were designed and implemented at sensory-friendly and relaxed performances offered at the theater. A patron profile is presented to illustrate how the supports were integrated before, during, and after the event. The article concludes with next steps and actual patron perspectives as a result of the relationship.

Jase 4.1 Table Of Contents

Journal of the Arts and Special Education

JASE 4.1 Table of Contents

Jase 4.1 Front Matter

Journal of the Arts and Special Education

JASE Volume 4, Issue 1 Front Matter

Jase 4.1 Cover, Hannah Carpenter

Journal of the Arts and Special Education

JASE 4.1 Cover

Journal Of The Arts And Special Education: Volume 4, Issue 1

Journal of the Arts and Special Education

Volume 4, Issue 1

The Wish, Seungwon Lee

Night Flight: Online Literary Journal

The story begins in a high school setting, with a teenage girl as the main character. She is known as a “Plain Jane,” who wishes to become pretty and popular like some of the other girls at her school. Jane's wishes come true after her strange encounter with an old woman. At first, our Plain Jane is a bit overwhelmed but happily lives each day, enjoying the attention from her fellow friends and classmates. But as time goes on, her greed starts to grow as well, and her personality and behavior start to change. She starts wishing for other things …

Cycles Of Life: A Journey Through Birth, Aging, Illness, And Death, Xinyu Zhang

Night Flight: Online Literary Journal

This poignant poetry collection captures the full spectrum of human experience. Through a series of reflective and evocative poems, the collection explores the universal themes of birth, aging, illness, and death, portraying the beauty, pain, joy, and sorrow inherent in each phase of life. The poems articulate profound personal experiences while resonating with readers who have faced similar moments of profound change and reflection. By distilling complex emotions into concise and powerful language, this collection offers a sense of connection and understanding, encouraging deep emotional responses and inspiring strength in the face of life's inevitable cycles. Through the natural imagery …

When The Shadows Come Out To Play, Maggie Anaya

Night Flight: Online Literary Journal

Leah, a strong and confident woman, finds herself paralyzed with fear in a vivid nightmare where a towering beast attacks her. Awakening safe in her tent at Grinnell Lake, she struggles to shake off the terror of her dream. As dawn breaks, Leah reflects on the beauty of her surroundings and the ten-mile hike that brought her and her friends to this serene location. Despite the lingering unease from her nightmare, she embraces the tranquility of the lake and the promise of a relaxing weekend. However, as she takes a morning walk, Leah’s peace is shattered when she encounters a …

You Should Feel This Too, John A. Rethage

Night Flight: Online Literary Journal

Creating an existence is difficult, but with experience we find the words, fitting them into spaces that once occupied the tip of tongues. These works are my journey through love and loss, finding my person and watching them lose themselves in the same breath. A collective of my psyche, it's embrace, decent, and path through and beyond.

Secular Trends In Underweight, Overweight, And Physical Fitness Of Girls And Boys Aged 16–18 In Eastern Poland From 2006 To 2016–2021, Agnieszka Wasiluk, Jerzy Saczuk

Baltic Journal of Health and Physical Activity

Introduction: Significant changes in the nutrition and physical fitness of children and adolescents have been observed in many countries around the world. The purpose of this study is to determine the changes in the prevalence of underweight, normal BMI, and overweight, as well as in the physical fitness of girls and boys from eastern Poland. Materials and methods: The study was conducted over the years 2006–2021. BMI was calculated, and physical fitness was assessed using the EUROFIT test. The results were statistically analyzed. Results: Minor changes in underweight were observed, and even a re-duction in its prevalence among girls was …

Simulating Authentic User Personas To Generate Analytics For Evaluating Digital Products, Oded Elyada, Oriana Riva, Avia Aharon, Ido Hakimi, Ron Ziv, Danny Karmon

Defensive Publications Series

It is challenging to acquire user data from a diverse set of adequate numbers of suitable real end users for design, evaluation, and improvement of a product. Involving real users in evaluation requires a sufficient level of product maturity. It is difficult to bootstrap and test personalization because it requires personal data. This disclosure describes techniques to overcome these limitations by generating synthetic data that mimics authentic digital and social user practices via simulated personas with local memory. The simulation utilizes the semantic understanding and reasoning capabilities of LLMs and includes interaction between the personas and various digital applications and …

3d Bioactive Thiol-Norbornene Hydrogels For Guiding Stem Cell Mechanosensing And Differentiation, Arielle Gsell

U-RISE Undergraduate Theses

Hydrogels are soft, highly hydrated polymeric networks commonly used as biomaterial scaffolds in tissue engineering. To mimic the extracellular matrix of tissues, hydrogels can be chemically modified to incorporate either bioactive molecules such as peptides, or physically modified with crosslinkers to alter hydrogel stiffness and degradation. Hydrogels with defined characteristics can be synthesized using chemical reaction schemes such as photo-click chemistry, which offers spatial and temporal control over biochemical and physical properties. The goal of this thesis is to leverage thiol-norbornene click chemistry, a subtype of photo-click chemistry, to develop 3D hydrogels with biochemical and biophysical cues that guide mesenchymal …