Climbing Night-shade as a Host of the Pear Psylla (Homoptera: Psyllidae)

1966 ◽  
Vol 98 (5) ◽  
pp. 558-559 ◽  
Author(s):  
Walter H. A. Wilde
Keyword(s):  
Life Cycle ◽  
Cover Crop ◽  
Growing Season ◽  
Instar Nymph ◽  
Plant Host ◽  
Solanum Dulcamara ◽  
Pear Psylla ◽  
The World ◽  
Pear Orchard ◽  
Hard Shell

In Ontario, pear has been the only recorded host of the pear psylla, Psylla pyricola Foerster (Goble 1963), although in other areas of the world Quince, Downy Chess Grass, and apple twigs have also been reported (Smith 1941; Swirski 1954; and Wilde 1963).Numbers of pear psylla adults were observed on climbing night-shade, Solanum dulcamara L. (Muenscher 1955) growing as cover crop in a pear orchard near Paris, Ontario, in 1965. Regular observation of psylla occurrence on this plant host throughout the growing season indicated that P. pyricola Foer. could complete its life cycle on S. dulcamara; eggs and nymphal stages up to the hard-shell stage, as well as cast nymphal skins, were observed on this host. Egg mortality was noted on those portions of S. dulcamara that were damaged showed severe wilting characteristics. Egg and second-instar nymph on the undersurface of the leaf of S. dulcamara are illustrated in Figs. 1 and 2.

Intervenções de carreira ao longo da vida: perspectivas e desafios

2020 ◽  
Author(s):  
Iúri Novaes Luna ◽  
Valéria De Bettio Mattos
Keyword(s):  
Life Cycle ◽  
Human Development ◽  
National Literature ◽  
Research And Practice ◽  
Career Interventions ◽  
The World ◽  
Psychosocial Processes ◽  
Diversity Of Life ◽  
Professional Guidance ◽  
Central Purpose

This book, comprised of 13 chapters, presents papers which discuss the processes related to the career along one’s life cycle, from adolescents’ professional choices until processes of retirement. Notwithstanding the diversity of life and work contexts, present in the different chapters, they all somewhat correspond in their central purpose, presenting both perspectives and challenges related to contemporary career interventions. Some chapters address themes that are still seldom explored in national literature, while others discuss subjects that are long established in the area, however they are innovative. The authors study them in the context of changes in the world of work in the second decade of the 21st century, of the new career models and psychosocial processes that are linked to human development throughout life. The studies and practices in vocational guidance, career development and retirement, included in this book, are the results of research and practice in recent years carried out by professionals, professors and academics that in different ways have collaborated with the activities of LIOP - Laboratory of Information and Professional Guidance, at the Federal University of Santa Catarina.

The chronicle of COVID-19: possible strategies to curb the pandemic

2020 ◽  
Vol 27 ◽  
Author(s):  
Rajesh Kumar ◽  
Seetha Harilal ◽  
Abdullah G. Al-Sehemi ◽  
Githa Elizabeth Mathew ◽  
Simone Carradori ◽  
...  
Keyword(s):  
Life Cycle ◽  
Research And Development ◽  
Vaccine Development ◽  
Therapeutic Strategies ◽  
Antiviral Drugs ◽  
Limited Data ◽  
Social Distancing ◽  
The World ◽  
Novel Virus ◽  
Day By Day

: COVID-19, an epidemic that emerged in Wuhan, has become a pandemic affecting worldwide and is in a rapidly evolving condition. Day by day, the confirmed cases and deaths are increasing many folds. SARS-CoV-2 is a novel virus; therefore, limited data are available to curb the disease. Epidemiological approaches, isolation, quarantine, social distancing, lockdown, and curfew are being employed to halt the spread of the disease. Individual and joint efforts all over the world are producing a wealth of data and information which are expected to produce therapeutic strategies against COVID-19. Current research focuses on the utilization of antiviral drugs, repurposing strategies, vaccine development as well as basic to advanced research about the organism and the infection. The review focuses on the life cycle, targets, and possible therapeutic strategies, which can lead to further research and development of COVID-19 therapy.

scholarly journals A Comprehensive, Flexible Collection of SARS-CoV-2 Coding Regions

2020 ◽  
Vol 10 (9) ◽  
pp. 3399-3402 ◽  
Author(s):  
Dae-Kyum Kim ◽  
Jennifer J Knapp ◽  
Da Kuang ◽  
Aditya Chawla ◽  
Patricia Cassonnet ◽  
...  
Keyword(s):  
Life Cycle ◽  
Viral Life Cycle ◽  
Coding Sequences ◽  
Coding Regions ◽  
Global Pandemic ◽  
The World ◽  
Molecular Studies ◽  
Widespread Availability ◽  
Rapid Transfer

Abstract The world is facing a global pandemic of COVID-19 caused by the SARS-CoV-2 coronavirus. Here we describe a collection of codon-optimized coding sequences for SARS-CoV-2 cloned into Gateway-compatible entry vectors, which enable rapid transfer into a variety of expression and tagging vectors. The collection is freely available. We hope that widespread availability of this SARS-CoV-2 resource will enable many subsequent molecular studies to better understand the viral life cycle and how to block it.

Life Cycle, Generational and Period Effects on Protest Potential in Yeltsin's Russia

2008 ◽  
Vol 41 (2) ◽  
pp. 437-460 ◽  
Author(s):  
Olena Nikolayenko
Keyword(s):  
Life Cycle ◽  
Transition Period ◽  
World Values Survey ◽  
Communist State ◽  
Period Effects ◽  
The World ◽  
Cycle De Vie ◽  
Europe De L’Est ◽  
Using Data ◽  
Social Turmoil

Abstract. Regime change in Eastern Europe affords an excellent opportunity for investigating linkages between age and politics in times of social turmoil. Using data from three waves of the World Values Survey, this paper explores life cycle, generational and period effects on protest potential in Yeltsin's Russia. The study finds that an individual's position in the life cycle is the strongest predictor of protest potential in the post-communist state. Furthermore, the analysis suggests that citizens socialized during periods of relative socioeconomic stability exhibit the highest protest potential under conditions of uncertainty characteristic of the transition period.Résumé. Les changements de régime en Europe de l'Est permettent d'examiner la relation complexe entre l'âge et la politique pendant les périodes d'instabilité sociale. S'appuyant sur les données de trois vagues du World Values Survey (sondage mondial sur les valeurs), cet article explore l'incidence du cycle de vie, de la génération et de la période sur le potentiel protestataire dans la Russie d'Eltsine. L'étude démontre que la position de l'individu dans le cycle de vie est le plus puissant facteur de prédiction du potentiel protestataire dans la société postcommuniste. En outre, les citoyens socialisés pendant des périodes de relative stabilité socio-économique présentent le potentiel protestataire le plus élevé dans des conditions d'incertitude caractéristiques de la période de transition.

scholarly journals Life-cycle evaluation of nitrogen-use in rice-farming systems: implications for economically-optimal nitrogen rates

2011 ◽  
Vol 8 (11) ◽  
pp. 3159-3168 ◽  
Author(s):  
Y. Xia ◽  
X. Yan
Keyword(s):  
Life Cycle ◽  
Environmental Impact ◽  
Taihu Lake ◽  
Oryza Sativa L ◽  
Growing Season ◽  
Economic Effects ◽  
N Fertilizer ◽  
Environmental Cost ◽  
N Losses ◽  
Lake Region

Abstract. Nitrogen (N) fertilizer plays an important role in agricultural systems in terms of food yield. However, N application rates (NARs) are often overestimated over the rice (Oryza sativa L.) growing season in the Taihu Lake region of China. This is largely because negative externalities are not entirely included when evaluating economically-optimal nitrogen rate (EONR), such as only individual N losses are taken into account, or the inventory flows of reactive N have been limited solely to the farming process when evaluating environmental and economic effects of N fertilizer. This study integrates important material and energy flows resulting from N use into a rice agricultural inventory that constitutes the hub of the life-cycle assessment (LCA) method. An economic evaluation is used to determine an environmental and economic NAR for the Taihu Lake region. The analysis reveals that production and exploitation processes consume the largest proportion of resources, accounting for 77.2 % and 22.3 % of total resources, respectively. Regarding environmental impact, global warming creates the highest cost with contributions stemming mostly from fertilizer production and farming processes. Farming process incurs the biggest environmental impact of the three environmental impact categories considered, whereas transportation has a much smaller effect. When taking account of resource consumption and environmental cost, the marginal benefit of 1 kg rice would decrease from 2.4 to only 1.05 yuan. Accordingly, our current EONR has been evaluated at 187 kg N ha−1 for a single rice-growing season. This could enhance profitability, as well as reduce the N losses associated with rice growing.

scholarly journals Echinococcus spp.: Tapeworms that Pose a Danger to Both Animals and Humans – a Review

2017 ◽  
Vol 48 (4) ◽  
pp. 193-201 ◽  
Author(s):  
A. Brožová ◽  
I. Jankovská ◽  
V. Bejček ◽  
S. Nechybová ◽  
P. Peřinková ◽  
...  
Keyword(s):  
Small Intestine ◽  
Life Cycle ◽  
Echinococcus Multilocularis ◽  
Alveolar Echinococcosis ◽  
Sensu Stricto ◽  
Mammal Species ◽  
Current State ◽  
Wide Range ◽  
The World ◽  
Echinococcus Spp

Abstract Species of the genus Echinococcus (Cestoda; Taeniidae) are minute tapeworms of carnivores. Their larvae are known as hydatids (metacestode), which proliferate asexually in various mammals. Like the majority of cestodes, Echinococcus spp. require two different host species to complete their life cycle. Definitive hosts harbouring the adult cestodes in the small intestine are exclusively carnivores of the Canidae and Felidae families. A wide range of mammal species including humans is susceptible to infection by the metacestode of Echinococcus spp., which develops in their viscera. The disease, caused by species of the genus Echinococcus, is called echinococcosis, and it is one of the most dangerous zoonoses in the world. The traditional species Echinococcus granulosus and Echinococcus multilocularis are agents of significant diseases due to the high number of cases and the wide geographical species range. The taxonomy of the genus is controversial; in the current state of ongoing complex revisions, the agent of cystic echinococcosis E. granulosus sensu lato is divided into five species (E. granulosus sensu stricto, E. felidis, E. equinus, E. ortleppi, E. canadensis), in addition to the agents of alveolar echinococcosis (E. multilocularis, E. shiquicus) and polycystic/unicystic echinococcosis (E. vogeli, E. oligarthrus). Here we provide an overview of the current situation, which continues to develop.

Mapping of main research lines concerning life cycle studies on packaging systems in Brazil and in the world

2018 ◽  
Vol 24 (8) ◽  
pp. 1429-1443 ◽  
Author(s):  
Murillo Vetroni Barros ◽  
Rodrigo Salvador ◽  
Cassiano Moro Piekarski ◽  
Antonio Carlos de Francisco
Keyword(s):  
Life Cycle ◽  
Main Research ◽  
The World

scholarly journals Managed infrastructure and services to empower meteorological services in developing countries

2021 ◽  
Author(s):  
Tom Smith
Keyword(s):  
Developing Countries ◽  
Life Cycle ◽  
Value Chain ◽  
Life Cycle Management ◽  
Observation Data ◽  
Negative Consequences ◽  
Observation Systems ◽  
Spatial Coverage ◽  
The World ◽  
The Impact

<p>Often in developing countries the spatial coverage with surface weather observations is sparse and the reliability of existing systems is lower than in other parts of the world. These gaps in the availability of observation data have significant negative consequences, locally and globally. For decades international funds have been used to acquire meteorological infrastructure with little to no focus on life-cycle management. Furthermore, improvements in one part of the value chain are often not connected with further downstream services meaning local benefits are generated with substantial delay, if at all.</p><p>DTN is one of the few organizations offering comprehensive solutions across the value chain from deployment and operation of observation systems through to weather analytics creating valuable insights for business, consumers and governments across the globe. DTN not only project manages the setup of weather observation systems but also maintains and operates measurement networks on different continents. The sensor agnostic approach enables us to offer the right sensor solution for each situation.</p><p>We see an opportunity to correct the mistakes of the past, changing the focus from acquiring observation systems to life cycle management to ensure the systems are maintained and leveraged effectively to provide forecasts and warnings for protection of life and property and enabling NMSs to focus on fulfilling their mission.</p><p>Funding organizations such as the World Bank must change the focus from hardware procurement to a performance-based PPE/P model that ensures the value of investments in infrastructure are realized. This sustainable approach will; ensure long lasting partnerships, harness the innovation in the private sector, create local jobs maintaining infrastructure and enable economic development through improved ability to manage the impact of weather and climate events.</p>

scholarly journals Chironomidae: Biology, Ecology and Systematics

2021 ◽  
Author(s):  
Zerguine Karima
Keyword(s):  
Life Cycle ◽  
Larval Stage ◽  
Adult Stage ◽  
Aquatic Environments ◽  
Biting Midges ◽  
Important Family ◽  
Theoretical Synthesis ◽  
The Family ◽  
The World ◽  
Holarctic Region

The family of Chironomidae is a group of Diptera insects belonging to the suborder of Nematocera, commonly called “non-biting midges” in the adult stage and “bloodworms” in the larval stage. The Chironomidae are often the most abundant group of macroinvertebrates, in number of species and individuals, encountered in all aquatic environments of freshwater, brackish, terrestrial and even the sea. Likewise, Chironomidae occur in all the continents. The Chironomidae family is divided into 11 sub-families that have diffrent ecological statues. Despite the wealth of data on Chironomidae in the Holarctic region, other parts of the world are poorly studied and few guides to identifying Chironomidae have been produced. This chapter includes a theoretical synthesis on the Chironomidae, it deals with the Biology (life cycle and description of different stages), description of all subfamilies and the ecology of this important family of Diptera.

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