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Search Results: 1 - 10 of 8744 matches for " GREGORY ALLYN EVANS "
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Cycad Aulacaspis Scale, a Newly Introduced Insect Pest in Indonesia
HAYATI Journal of Biosciences , 2012,
Abstract: Cycad aulacaspis scale (Aulacaspis yasumatsui Takagi (Hemiptera: Diaspididae)) is native to Thailand and Vietnam. Since the early 1990s it has been spreading around the world due to the trade in cycad plants for ornamental use. Infestation by this scale can kill cycads in only a few months. Its accidental introduction to Florida endangered the ornamental cycad-growing industry; and in Guam and Taiwan, endemic cycads (Cycas micronesica and C. taitungensis, respectively) are currently threatened with extinction by cycad aulacaspis scale. In November 2011, an introduced scale was discovered damaging cycads in the Bogor Botanic Garden. Samples from Bogor were taken for identification of the scale, and the material was kept for some time to rear out any insect parasitoids that were present. Both the scale insects and parasitoids were prepared on microscope slides and studied microscopically for authoritative identification. The scale was confirmed as A. yasumatsui. The parasitoid Arrhenophagus chionaspidis Aurivillius (Hymenoptera: Encyrtidae) and the hyperparasitoid Signiphora bifasciata Ashmead (Hymenoptera: Signiphoridae) were identified from the samples. Unless immediate remedial measures are taken, several endemic species of cycad in Indonesia may be endangered by infestation by cycad aulacaspis scale.
A new species of armored scale, Mycetaspis ailynaomi (Hemiptera, Diaspididae, Aspidiotinae), associated with Mammea americana L. (Malpighiales, Calophyllaceae) from Puerto Rico
Ramón Dones,Gregory Evans
ZooKeys , 2011, DOI: 10.3897/zookeys.108.1214
Abstract: A new species of armored scale, Mycetaspis ailynaomi Dones and Evans is described and illustrated from specimens collected on mamey (Mammea americana) from Puerto Rico. A key to the species of Mycetaspis is provided.
American Society of Plastic Surgeons and Korean Society of Plastic and Reconstructive Surgeons Society Leadership Meeting
Gregory R.D. Evans
Archives of Plastic Surgery , 2013, DOI: http://dx.doi.org/10.5999/aps.2013.40.2.89
Advances in Wound Healing: A Review of Current Wound Healing Products
Patrick S. Murphy,Gregory R. D. Evans
Plastic Surgery International , 2012, DOI: 10.1155/2012/190436
Abstract: Successful wound care involves optimizing patient local and systemic conditions in conjunction with an ideal wound healing environment. Many different products have been developed to influence this wound environment to provide a pathogen-free, protected, and moist area for healing to occur. Newer products are currently being used to replace or augment various substrates in the wound healing cascade. This review of the current state of the art in wound-healing products looks at the latest applications of silver in microbial prophylaxis and treatment, including issues involving resistance and side effects, the latest uses of negative pressure wound devices, advanced dressings and skin substitutes, biologic wound products including growth factor applications, and hyperbaric oxygen as an adjunct in wound healing. With the abundance of available products, the goal is to find the most appropriate modality or combination of modalities to optimize healing. 1. Introduction The field of wound care seemingly contains as many different treatment options and modalities as the number of practitioners caring for wounds. While many clinicians rely on and obtain good results with older “tried and true” treatments, there continues to be a constant flow of new products and technologies to add to the wound care armamentarium. Some of these products are updated and improved variations of previous treatments, while others are the result of entirely new fields of study. As with any new product, oftentimes the race to introduction into clinical use precedes adequate controlled study, and the efficacy is then defined by clinical experience. This can lead to unanswered questions regarding appropriate use and indications. This paper will discuss several new technologies in burn and wound care. Silver dressings are time honored in wound care, but new forms of delivery aim to increase the efficacy while minimizing side effects. We will also review some of the latest literature on emerging bacterial resistance to these products. Negative pressure wound devices are relatively new in wound care treatment, and their indications are continually expanding to encompass aspects of wound management that previously had very few options. Advanced wound dressing products can help alter the wound environment to optimize healing conditions. With the advent of biosynthetics and tissue engineering, skin substitutes are being created that not only provide novel effective temporary coverage of wounds, but are also changing the paradigm of wound management. By supporting the wound with growth factors
Generation of Induced Pluripotent Stem (iPS) Cells by Nuclear Reprogramming
Dilip Dey,Gregory R. D. Evans
Stem Cells International , 2011, DOI: 10.4061/2011/619583
Abstract: During embryonic development pluripotency is progressively lost irreversibly by cell division, differentiation, migration and organ formation. Terminally differentiated cells do not generate other kinds of cells. Pluripotent stem cells are a great source of varying cell types that are used for tissue regeneration or repair of damaged tissue. The pluripotent stem cells can be derived from inner cell mass of blastocyte but its application is limited due to ethical concerns. The recent discovery of iPS with defined reprogramming factors has initiated a flurry of works on stem cell in various laboratories. The pluripotent cells can be derived from various differentiated adult cells as well as from adult stem cells by nuclear reprogramming, somatic cell nuclear transfer etc. In this review article, different aspects of nuclear reprogramming are discussed. 1. Introduction Adult human beings cannot regenerate organs as the regeneration has silenced during evolution to protect from tumorigenesis. However, in human, part of the liver can regenerate. In lower animals, regeneration of organs or part of organs are very common. Song birds’ brain tissue that controls the singing of birds dies after every breeding season and that lost neuron is again are replaced at the advent of next breeding season [1]. Reptiles like lizards lose their tail to deceive predators and the lost tail regenerates. Terminal differentiated cells like fibroblasts are thought to be unable to convert to other cell types. However, cloning experiments in amphibians and later in mammals proved that indeed they have the potential to reprogram and generate other cell types [2, 3]. Human adult neurons, heart tissues never thought to regenerate but in the late 90’s it was found that in occasional cases human adult neurons divide [4]. It is now established that terminal differentiation of cells is a reversible process that has generated a lot of interest in reversion of cell differentiation and reprogramming to iPS. Stem cells can divide unlimitedly and can give rise to its own and different kinds of adult cells. It holds the promise for the treatment of several neurological and other debilitating diseases like Parkinson, Alzheimers, ischemic heart failure, diabetes mellitus, Huntington disease, and sickle cell anemia [5]. 2. Sources of Pluripotent Cells Several methods of pluripotent cell derivation exist. (a) Embryonic stem (ES) cells can be harvested directly from the inner cell mass (ICM) of preimplantation blastocyst. (b) Somatic cell nuclear transfer (SCNT) is a therapeutic technique where adult
Nuevos registros de especies del género Eretmocerus (Hymenoptera: Aphelinidae), parasitoides de Trialeurodes vaporariorum y el complejo Bemisia tabaci (Hemiptera: Aleyrodidae) en Argentina
López,Silvia N.; Evans,Gregory A.;
Revista de la Sociedad Entomol?3gica Argentina , 2008,
Abstract: the objective of this paper is to report new records of species of the genus eretmocerus haldeman, parasitoids of the most important whitefly pest species in vegetables and ornamental crops in argentina. one species was found parasitizing trialeurodes vaporariorum (westwood) in santa fe and buenos aires provinces and it is grouped into californicus group near corni haldeman, due to its morphological characters. it could be a new species. the known distribution of eretmocerus mundus mercet, a parasitoid of bemisia tabaci (gennadius), is enlarged to include the provinces of san juan and buenos aires of argentina.
Nuevos registros de especies del género Eretmocerus (Hymenoptera: Aphelinidae), parasitoides de Trialeurodes vaporariorum y el complejo Bemisia tabaci (Hemiptera: Aleyrodidae) en Argentina New records of species of the genus Eretmocerus (Hymenoptera: Aphelinidae), parasitoids of Trialeurodes vaporariorum and Bemisia tabaci complex (Hemiptera: Aleyrodidae) in Argentina
Silvia N. López,Gregory A. Evans
Revista de la Sociedad Entomol?3gica Argentina , 2008,
Abstract: El objetivo de este trabajo es dar a conocer nuevos registros y distribuciones de las especies del género Eretmocerus Haldeman, parasitoides de las dos especies de mosca blanca que tienen mayor importancia económica en cultivos hortícolas y ornamentales en Argentina. Una especie de Eretmocerus Haldeman fue hallada parasitando a Trialeurodes vaporariorum (Westwood) en Santa Fe y Buenos Aires; por sus caracteres morfológicos, se encuentra en el grupo californicus, cercana a corni Haldeman, podría tratarse de una nueva especie. Asimismo, se amplía la distribución geográfica de Eretmocerus mundus Mercet, enemigo natural del complejo Bemisia tabaci (Gennadius), a las provincias de San Juan y Buenos Aires. The objective of this paper is to report new records of species of the genus Eretmocerus Haldeman, parasitoids of the most important whitefly pest species in vegetables and ornamental crops in Argentina. One species was found parasitizing Trialeurodes vaporariorum (Westwood) in Santa Fe and Buenos Aires provinces and it is grouped into californicus group near corni Haldeman, due to its morphological characters. It could be a new species. The known distribution of Eretmocerus mundus Mercet, a parasitoid of Bemisia tabaci (Gennadius), is enlarged to include the provinces of San Juan and Buenos Aires of Argentina.
McRunjob: A High Energy Physics Workflow Planner for Grid Production Processing
Gregory E. Graham,Dave Evans,Iain Bertram
Computer Science , 2003,
Abstract: McRunjob is a powerful grid workflow manager used to manage the generation of large numbers of production processing jobs in High Energy Physics. In use at both the DZero and CMS experiments, McRunjob has been used to manage large Monte Carlo production processing since 1999 and is being extended to uses in regular production processing for analysis and reconstruction. Described at CHEP 2001, McRunjob converts core metadata into jobs submittable in a variety of environments. The powerful core metadata description language includes methods for converting the metadata into persistent forms, job descriptions, multi-step workflows, and data provenance information. The language features allow for structure in the metadata by including full expressions, namespaces, functional dependencies, site specific parameters in a grid environment, and ontological definitions. It also has simple control structures for parallelization of large jobs. McRunjob features a modular design which allows for easy expansion to new job description languages or new application level tasks.
Notes on the Early Stages of Deilephila Intermedia
Allyn Cox
Psyche , 1909, DOI: 10.1155/1909/48631
Foxf2: A Novel Locus for Anterior Segment Dysgenesis Adjacent to the Foxc1 Gene
Richard McKeone, Helena Vieira, Kevin Gregory-Evans, Cheryl Y. Gregory-Evans, Paul Denny
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0025489
Abstract: Anterior segment dysgenesis (ASD) is characterised by an abnormal migration of neural crest cells or an aberrant differentiation of the mesenchymal cells during the formation of the eye's anterior segment. These abnormalities result in multiple tissue defects affecting the iris, cornea and drainage structures of the iridocorneal angle including the ciliary body, trabecular meshwork and Schlemm's canal. In some cases, abnormal ASD development leads to glaucoma, which is usually associated with increased intraocular pressure. Haploinsufficiency through mutation or chromosomal deletion of the human FOXC1 transcription factor gene or duplications of the 6p25 region is associated with a spectrum of ocular abnormalities including ASD. However, mapping data and phenotype analysis of human deletions suggests that an additional locus for this condition may be present in the same chromosomal region as FOXC1. DHPLC screening of ENU mutagenised mouse archival tissue revealed five novel mouse Foxf2 mutations. Re-derivation of one of these (the Foxf2W174R mouse lineage) resulted in heterozygote mice that exhibited thinning of the iris stroma, hyperplasia of the trabecular meshwork, small or absent Schlemm's canal and a reduction in the iridocorneal angle. Homozygous E18.5 mice showed absence of ciliary body projections, demonstrating a critical role for Foxf2 in the developing eye. These data provide evidence that the Foxf2 gene, separated from Foxc1 by less than 70 kb of genomic sequence (250 kb in human DNA), may explain human abnormalities in some cases of ASD where FOXC1 has been excluded genetically.
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