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"Ward, Jennifer"
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What will hatch?
From a squiggly tadpole to fuzzy robin to a leathery platypus, this charming text and unique illustrations show eight different animals as they begin life. With a cut-out on each page readers will have fun guessing... what will hatch?
Book
Home range size, vegetation density, and season influences prey use by coyotes (Canis latrans)
To ensure reproductive success, Canis species establish contiguous mosaics of territories in suitable habitats to partition space and defend limiting resources. Consequently, Canis species can exert strong effects on prey populations locally because of their year-round maintenance of territories. We assessed prey use by coyotes (Canis latrans) by sampling scats from within known territories in southeastern Alabama and the Savannah River area of Georgia and South Carolina. We accounted for the size and habitat composition of coyote home ranges to investigate the influence of space use, vegetation density, and habitat type on coyote diets. Coyote use of prey was influenced by a combination of mean monthly temperature, home range size, vegetation density, and hardwood forests. For example, coyote use of adult white-tailed deer (Odocoileus virginianus) was associated with cooler months and smaller home ranges, whereas use of rabbits (Sylvilagus spp.) was associated with cooler months, larger home ranges, and less vegetation density. Coyotes in our study relied primarily on nutritionally superior mammalian prey and supplemented their diet with fruit when available, as their use of mammalian prey did not appreciably decrease with increasing use of fruit. We suggest that differential use of prey by coyotes is influenced by habitat heterogeneity within their home ranges, and prey-switching behaviors may stabilize local interactions between coyotes and their food resources to permit stable year-round territories. Given that habitat composition affects coyote prey use, future studies should also incorporate effects of habitat composition on coyote distribution and abundance to further identify coyote influences on prey communities.
Journal Article
Mama built a little nest
Illustrations and simple, rhyming text introduce different kinds of birds' nests, from the scrapes falcons build on high, craggy ledges to the underground nests burrowing owls dig. Includes brief facts about each kind of bird.
Book
Understanding “process vs product” in the shelter and settlements sector: a reflection
Purpose“Process” vs “product”: this concept was originally introduced by Ian Davis in 1978 in Shelter After Disaster. However, 40 years later, in the halls of universities, it would appear a long way from having settled in the minds of upcoming engineers and architects looking to contribute to the field of disaster management. This key understanding is a major steppingstone to those pursuing careers in the shelter and settlements sector. However, the clarity of the argument and its importance still fails to reach some humanitarians in the early stages of their career. This perspective reflects on the key arguments for and against process over product and reflects on the reasons for the lack of recognition of this concept in early stage academics in the shelter and settlements sector. It also discusses the academic practitioner divide and pathways for learning within the sector.Design/methodology/approachThis perspective reflects on discussions over four years of a progression into the humanitarian shelter and settlements sector from a construction and engineering background. It discusses the author’s personal progression in understanding process over product and observations of other early stage researchers taking similar pathways. It also examines literature in the sector and the key texts which affect this progression. Furthermore, this perspective provides comments from experts in the shelter and settlements sector through a small series of informal interviews. This provides insight into their experience with upcoming architects and engineers, and key messages for early stage researchers.FindingsThis reflection found that upcoming architects and engineering students still undergo a journey of understanding over “process vs product” despite changes in the industry. These students can benefit from the understanding of shelter as a process.Originality/valueThe concept of process vs product is not a new one. It is arguably one of the most central arguments to the shelter and settlements sector. However, there is very little written on the learning of this concept or the effects it has on understanding the broader aspects of the sector. This reflection can provide significant value to early stage researchers who have yet to engage with this concept, and further highlight its importance of learning pathways to the sector.
Journal Article
What will grow?
\"Seeds can be big or small, round or pointy, and all sorts of colors. They can become flowers, trees, fruits, or vegetables, and they grow all times of year, during spring, summer, fall, and winter. But all seeds have one thing in common--inside each is a new plant life waiting to emerge. What kind of plant will bloom?\"-- Provided by publisher.
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Engineering Smart Targeting Nanovesicles and Their Combination with Hydrogels for Controlled Drug Delivery
Smart engineered and naturally derived nanovesicles, capable of targeting specific tissues and cells and delivering bioactive molecules and drugs into them, are becoming important drug delivery systems. Liposomes stand out among different types of self-assembled nanovesicles, because of their amphiphilicity and non-toxic nature. By modifying their surfaces, liposomes can become stimulus-responsive, releasing their cargo on demand. Recently, the recognized role of exosomes in cell-cell communication and their ability to diffuse through tissues to find target cells have led to an increase in their usage as smart delivery systems. Moreover, engineering \"smarter\" delivery systems can be done by creating hybrid exosome-liposome nanocarriers via membrane fusion. These systems can be loaded in naturally derived hydrogels to achieve sustained and controlled drug delivery. Here, the focus is on evaluating the smart behavior of liposomes and exosomes, the fabrication of hybrid exosome-liposome nanovesicles, and the controlled delivery and routes of administration of a hydrogel matrix for drug delivery systems.
Journal Article
The busy tree
Many different types of wildlife live in and around a tree that is their home, from chipmunks and woodpeckers to ants and spiders.
Book
A chemical biology toolbox to study protein methyltransferases and epigenetic signaling
Protein methyltransferases (PMTs) comprise a major class of epigenetic regulatory enzymes with therapeutic relevance. Here we present a collection of chemical probes and associated reagents and data to elucidate the function of human and murine PMTs in cellular studies. Our collection provides inhibitors and antagonists that together modulate most of the key regulatory methylation marks on histones H3 and H4, providing an important resource for modulating cellular epigenomes. We describe a comprehensive and comparative characterization of the probe collection with respect to their potency, selectivity, and mode of inhibition. We demonstrate the utility of this collection in CD4
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T cell differentiation assays revealing the potential of individual probes to alter multiple T cell subpopulations which may have implications for T cell-mediated processes such as inflammation and immuno-oncology. In particular, we demonstrate a role for DOT1L in limiting Th1 cell differentiation and maintaining lineage integrity. This chemical probe collection and associated data form a resource for the study of methylation-mediated signaling in epigenetics, inflammation and beyond.
Protein methyltransferases (PMTs) are epigenetic regulatory enzymes with significant therapeutic relevance. Here the authors describe a collection of chemical inhibitors and antagonists to modulate most of the key methylation marks on histones H3 and H4, and use the collection to study of the role of PMTs in mouse and human T cell differentiation.
Journal Article
There was an old Martian who swallowed the moon
Join the old Martian as he swallows the moon, a comet, a rover, and more! Then he blasts off in his spaceship and he eats his way through the galaxy. But what happens when the Martian gets to the sun?
Book
Exotic tree and shrub invasions alter leaf-litter microflora and arthropod communities
Approximately 90% of all annual net primary productivity in temperate deciduous forests ends up entering the detritus food web as leaf litter. Due to chemical and physical differences from native litter, inputs from invasive species may impact the litter-dwelling community and ecosystem processes. We compared leaf-litter nutritional quality and decomposition rates from two invasive shrubs, Lonicera maackii and Rhamnus davurica, and the invasive tree Ailanthus altissima to litter from native oak-hickory forest in the Shenandoah Valley of Virginia, USA. We sampled litter from both invaded and uninvaded habitats and conducted litter colonization experiments to test for effects on microflora and the litter-dwelling arthropod communities. Litter from all three invasive species decomposed more rapidly than native litter, with native habitats averaging two to nearly five times as much litter by June. Invasive litter had higher nitrogen concentration and lower C:N ratios than native litter. Invasive litter supported greater growth of bacteria and fungi. Higher numbers of arthropods colonized invasive litter than native litter, but litter arthropod numbers on the forest floor of invaded habitats dropped in the early summer as litter decomposed. Litter had no effect on arthropod richness. Over short time scales, our results indicate that these invasive species represent beneficial, novel resources for the litter-dwelling community. However, the short-lived nature of this resource resulted in a crash in the abundance of the litter-dwelling organisms once the litter decomposed. As a whole, native habitat seems to support a larger, more stable litter-dwelling community over the course of a growing season.
Journal Article