Publications by authors named "Parnell S"

We present a resonant-mode, transverse-field, radio-frequency (rf) neutron spin flipper design that uses high-temperature superconducting films to ensure sharp transitions between uniform magnetic field regions. Resonant mode allows for low-power, high-frequency operation but requires strict homogeneity of the magnetic fields inside the device. This design was found to efficiently flip neutrons at 96.

View Article and Find Full Text PDF

The intestinal epithelium serves as a physical and functional barrier against harmful substances, preventing their entry into the circulation and subsequent induction of a systemic immune response. Gut barrier dysfunction has recently emerged as a feature of ageing linked to declining health, and increased intestinal membrane permeability has been shown to promote heightened systemic inflammation in aged hosts. Concurrent with age-related changes in the gut microbiome, the thymic microenvironment undergoes a series of morphological, phenotypical and architectural alterations with age, including disorganisation of the corticomedullary junction, increased fibrosis, increased thymic adiposity and the accumulation of senescent cells.

View Article and Find Full Text PDF

: This study tested whether self-reported training volume is predictive of female athlete triad risk collected using an established twelve-question triad screening tool in National Collegiate Athletic Association (NCAA) Division I (DI) collegiate female runners. : A total of 319 institutions were initially contacted, seven of which agreed to distribute surveys to their female cross-country and track and field athletes. A total of 41 of 149 respondents completed the survey and met all inclusion criteria.

View Article and Find Full Text PDF
Article Synopsis
  • The study employs spin-echo small-angle neutron scattering (SESANS) to examine a wide range of structures in polymer-carbon nanocomposites, effectively covering length scales from 10 nm to 16 μm.
  • The data processing incorporates a consistent method across two different SESANS instruments, producing reliable data that can be analyzed using established hierarchical models in software like SasView.
  • This technique significantly enhances the ability to gather information about bulk structures, surpassing traditional scattering methods and opening new avenues for analyzing polymer nanocomposites across various scales.
View Article and Find Full Text PDF

Alcohol exposure during the gastrulation stage of development can disrupt Sonic hedgehog (Shh) signaling and cause eye, craniofacial, and brain defects. One of the genes that regulates Shh signaling is Efcab7, which encodes a protein that facilitates the actions of Smoothened (Smo), a critical component of the Shh pathway. Previous work from our lab has demonstrated that Efcab7 is differentially expressed between two sub-strains of C57BL/6 mice that differ in their sensitivity to gastrulation-stage alcohol exposure.

View Article and Find Full Text PDF
Article Synopsis
  • The EFSA Panel on Plant Health conducted an assessment of non-EU Scolytinae species that affect non-coniferous plants in the EU, highlighting 5220 relevant species out of an initial 6495.
  • These beetles primarily target weakened or dead trees, with behaviors ranging from monogamous to polygynous mating systems, and many species are associated with fungi that help them weaken their hosts.
  • A database was created documenting host plants, feeding habits, geographic distribution, and climate types, ultimately identifying 88 species that significantly impact plant health, categorized by their level of threat.
View Article and Find Full Text PDF

In accordance with the EFSA Strategy 2027 outlining the need for fit-for-purpose protocols for EFSA generic scientific assessments, the EFSA Panel on Plant Health (PLH Panel) developed standard protocols to harmonise the problem formulation process and outputs for mandates addressing recurrent scientific questions. Three types of recurring EFSA plant health mandates require generic scientific assessments: (i) pest categorisation; (ii) commodity risk assessment for the purpose of derogation to provisions of the EU plant health law and (iii) quantitative pest risk assessment. The three standard protocols are tailored to the appropriate level of detail and build on the existing guidance documents laying out the methods for conducting risk assessment in the plant health domain.

View Article and Find Full Text PDF

The European Commission requested the EFSA Panel on Plant Health to deliver a risk assessment on the likelihood of pest freedom from Union quarantine pests and pests subject to measures adopted pursuant to Article 30 of Regulation (EU) No 2016/2031 for the maple veneer sheets manufactured according to the process set out by Canada, with emphasis on the freedom from and (non-EU isolates). The assessment was conducted for veneer sheets of up to 0.7 mm and up to 6 mm thickness, taking into account the different phases in the veneer production in a systems approach.

View Article and Find Full Text PDF

The European Commission requested the EFSA Panel on Plant Health to prepare and deliver risk assessments for commodities listed in Commission Implementing Regulation (EU) 2018/2019 as 'High risk plants, plant products and other objects'. This Scientific Opinion covers plant health risks posed by potted plants and bundles of bare-root plants or cell grown young plants or graftwood/budwood of imported from the United Kingdom, taking into account the available scientific information, including the technical information provided by the UK. All pests associated with the commodities were evaluated against specific criteria for their relevance for this opinion.

View Article and Find Full Text PDF
Pest categorisation of .

EFSA J

July 2024

The EFSA Panel on Plant Health performed a pest categorisation of (Hemiptera: Matsucoccidae), the Massonian pine bast scale, for the EU territory. This pest categorisation was initiated following the commodity risk assessment of artificially dwarfed plants from China consisting of (Japanese white pine) grafted on (Japanese black pine) performed by EFSA, in which was identified as a pest of possible concern. However, its identity is not firmly established due to uncertainty regarding its taxonomic relationship with (Green), a species widespread in Europe.

View Article and Find Full Text PDF

We show the implementation of superconducting magnetic Wollaston prisms for spin echo small-angle neutron scattering. Two calibration methods for the spin echo length are presented: one utilizing spin echo modulated small-angle neutron scattering and the other based on the neutron refraction by quartz wedge crystals. Our experimental results with polystyrene nano-particle colloids showcase the system's efficacy in measuring both dilute and concentrated colloidal systems.

View Article and Find Full Text PDF
Pest categorisation of .

EFSA J

July 2024

Article Synopsis
  • The European Commission asked the EFSA Panel on Plant Health to categorize the pest Maskell, also known as the pink wax scale, identified as a potential threat to the EU due to commodity risk assessments of plants from China.
  • This pest originates from Africa, attacks over 193 types of plants, mainly tropical and subtropical species, and has been in Germany since 2010, posing significant risks to various crops and ornamental plants.
  • With its ability to reproduce parthenogenetically and potentially spread via trade and natural means, introductions of this pest into the EU could lead to outbreaks, but effective phytosanitary measures exist to control its entry and spread.
View Article and Find Full Text PDF
Pest categorisation of .

EFSA J

July 2024

The EFSA Panel on Plant Health performed a pest categorisation of (Lepidoptera, Limacodidae), following the commodity risk assessment of plants grafted on from China, in which was identified as a pest of possible concern to the European Union. This species can be identified by morphological taxonomic keys and by barcoding. The adults of the overwintering generation emerge from late June to late August.

View Article and Find Full Text PDF
Pest categorisation of .

EFSA J

July 2024

The European Commission requested the EFSA Panel on Plant Health to conduct a pest categorisation of (Ellis & Everh) Sutton, following commodity risk assessments of , , and plants from the UK, in which was identified as a pest of possible concern to the EU. When first described, was a clearly defined fungus of the family Schizoparmaceae, but due to lack of a curated type-derived DNA sequence, current identification based only on DNA sequence is uncertain and taxa previously reported to be this fungus based on molecular identification must be confirmed. The uncertainty on the reported identification of this species translates into uncertainty on all the sections of this categorisation.

View Article and Find Full Text PDF

Following a request from the European Commission, the EFSA Panel on Plant Health performed a quantitative risk assessment for the EU of (Coleoptera: Curculionidae), a polyphagous pest occurring in Australia, New Zealand and South Africa. The current risk assessment focused on potential pathways for entry, the climatic conditions allowing establishment, the expected spread capacity and the impact considering a time horizon of 10 years (2023-2032). The Panel identified the import of apples, cut flowers and table grapes as the most relevant entry pathways.

View Article and Find Full Text PDF

The European Commission requested the EFSA Panel on Plant Health to prepare and deliver risk assessments for commodities listed in Commission Implementing Regulation (EU) 2018/2019 as 'High risk plants, plant products and other objects'. This Scientific Opinion covers plant health risks posed by plants of possibly grafted on rootstocks of either or their hybrids imported from the UK, taking into account the available scientific information, including the technical information provided by the UK. All pests associated with the commodities were evaluated against specific criteria for their relevance for this opinion.

View Article and Find Full Text PDF
Pest categorisation of .

EFSA J

June 2024

Article Synopsis
  • - The EFSA Panel on Plant Health assessed the Iranian false spider mite (Trombidiformes: Tenuipalpidae) as a potential pest for the EU, identified through a risk assessment of plants from Türkiye, where it currently exists.
  • - The mite primarily feeds on Rosaceae plants, including key EU crops like apples, pears, and figs, raising concerns about its potential impact in southern EU countries where conditions are suitable for its establishment.
  • - Although it’s not officially listed as a quarantine pest, effective phytosanitary measures can be implemented to prevent its entry and spread in the EU, with some uncertainties regarding the extent of its potential impact.
View Article and Find Full Text PDF
Pest categorisation of .

EFSA J

June 2024

The EFSA Panel on Plant Health performed a pest categorisation of (Coleoptera: Scarabaeidae), following a commodity risk assessment of bonsai grafted onto from China, in which was identified as a pest of possible concern for the territory of the European Union. This is a univoltine polyphagous pest that occurs in eastern Asia from Vietnam northwards through eastern China and Taiwan, South Korea and into Far East Russia. Hosts include species of fruit trees within the genera and , trees of forestry and environmental importance such as and , shrubs such as , soft fruit such as , grasses, including amenity turf and field crops such as potatoes, maize and soybean.

View Article and Find Full Text PDF

The European Commission requested the EFSA Panel on Plant Health to prepare and deliver risk assessments for commodities listed in Commission Implementing Regulation (EU) 2018/2019 as 'high risk plants, plant products and other objects'. Taking into account the available scientific information, including the technical information provided by the applicant country, this Scientific Opinion covers the plant health risks posed by the following commodities: bare-root plants and rooted plants in pots up to 7 years old and specimen trees in pots up to 15 years old imported into the EU from the UK. A list of pests potentially associated with the commodities was compiled.

View Article and Find Full Text PDF
Pest categorisation of .

EFSA J

May 2024

The EFSA Panel on Plant Health performed a pest categorisation of (Lepidoptera: Crambidae), the cucumber moth for the territory of the European Union (EU), following the commodity risk assessment of from Uganda, in which was identified as a pest of possible concern to the European Union. is native to South Asian countries and is now distributed in tropical and subtropical areas of the Americas, Africa, Asia and Oceania. In the EU, occurs in Madeira (Portugal).

View Article and Find Full Text PDF
Pest categorisation of .

EFSA J

May 2024

The EFSA Panel on Plant Health performed a pest categorisation of (Voss, 1937) (Coleoptera: Curculionidae), following the commodity risk assessment of bonsai plants from China consisting of grafted on , in which was identified as a pest of possible concern to the European Union (EU). This categorisation refers to , which is the pest's current valid scientific name. It is native to China and has never been recorded in the EU.

View Article and Find Full Text PDF
Pest categorisation of .

EFSA J

May 2024

The EFSA Panel on Plant Health performed a pest categorisation of Bailey's rust mite, Keifer (Acariformes: Eriophyidae), following the commodity risk assessment of plants from Türkiye performed by EFSA, in which was identified as a pest of possible concern to the European Union. This mite is not listed in Annex II of Commission Implementing Regulation (EU) 2019/2072. The eriophyid is known to occur in Africa, America, Asia, Europe (Greece and Serbia) and Oceania on spp.

View Article and Find Full Text PDF

This scientometric study reviews the scientific literature and CABI distribution records published in 2022 to find evidence of major disease outbreaks and first reports of pathogens in new locations or on new hosts. This is the second time we have done this, and this study builds on our work documenting and analyzing reports from 2021. Pathogens with three or more articles identified in 2022 literature were , , species complexes, ' Liberibacter asiaticus', , formae specialis, and f.

View Article and Find Full Text PDF

The European Commission requested the EFSA Panel on Plant Health to prepare and deliver risk assessments for commodities listed in Commission Implementing Regulation (EU) 2018/2019 as 'High risk plants, plant products and other objects'. This Scientific Opinion covers plant health risks posed by plants of and imported from the United Kingdom (UK) as: (a) bundles of budwood/graftwood; (b) 1- to 2-year-old whips, seedlings or transplants; (c) bundles of 1- to 2-year-old cell grown plants; (d) 1- to 7-year-old bare root single plants; and (e) up to 25-year-old single plants in pots, taking into account the available scientific information provided by the UK. A list of pests potentially associated with the commodities was compiled.

View Article and Find Full Text PDF