相关实验视频
Updated: May 26, 2025

08:49
Assessing Agrochemical Risk to Mated Honey Bee Queens
Published on: March 3, 2021
2.7K
来自英国的Taxus baccata植物的商品风险评估
EFSA journal. European Food Safety Authority
|February 25, 2025
概括
这项研究评估了来自英国的Taxus baccata植物中Phytophthora ramorum的风险. 盆栽中的植物不太可能无害虫,在老植物中,超过96%的植物没有P. ramorum.
科学领域:
- 植物健康风险评估
- 植物病理学 植物病理学
- 欧盟植物卫生法规 欧盟植物卫生法规
背景情况:
- 欧盟委员会授权对高风险植物进口进行风险评估.
- 来自英国的Taxus baccata (yew) 植物被确定为害虫引入的潜在途径.
- Phytophthora ramorum (非欧盟分离物) 被确定为一个关键的关键检疫害虫.
研究的目的:
- 对从英国进口的Taxus baccata进行植物健康风险评估.
- 评估针对Phytophthora ramorum的风险减轻措施的有效性.
- 为了确定进口T. baccata植物中无害虫的可能性.
主要方法:
- 来自英国的现有科学和技术数据的评估.
- 根据特定标准对与T. baccata相关的害虫进行评估.
- 专家知识诱导 (EKE) 用于估计无害虫的可能性.
- 考虑植物的年龄和生长习惯 (裸根与盆栽).
主要成果:
- 植物 (非欧盟分离物) 是唯一符合风险评估标准的欧盟检疫害虫.
- 评估了英国的风险减缓措施,考虑了潜在的限制因素.
- 发现,盆栽中的植物不太可能比裸根植物无害.
- EKE以95%的确定性表明,96.99-100%的旧盆栽和细胞培养的T. baccata植物没有P. ramorum.
结论:
- 塔克斯巴卡塔 (Taxus baccata) 是一个常青的宿主,为Phytophthora ramorum提供了一个重要的途径.
- 较老的植物,由于更长时间的暴露和更大的尺寸,更容易受到感染.
- 虽然已经采取了风险减轻措施,但在进口T. baccata中存在P. ramorum的残留风险,特别是在盆栽中的植物中.
相关概念视频
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
111
Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
111
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
36
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
36
Uncertainty: Overview
498
In analytical chemistry, we often perform repetitive measurements to detect and minimize inaccuracies caused by both determinate and indeterminate errors. Despite the cares we take, the presence of random errors means that repeated measurements almost never have exactly the same magnitude. The collective difference between these measurements - observed values - and the estimated or expected value is called uncertainty. Uncertainty is conventionally written after the estimated or expected value.
498
Hazard Rate
83
The hazard rate, also known as the hazard function or failure rate, is a statistical measure used to describe the instantaneous rate at which an event occurs, given that the event has not yet happened. From a probabilistic perspective, it represents the likelihood that a subject will experience the event in a very small time interval, conditional on surviving up to the beginning of that interval. In terms of frequency, the hazard rate can be viewed as the ratio of the number of events to the...
83
Decision Making: P-value Method
5.2K
The process of hypothesis testing based on the P-value method includes calculating the P- value using the sample data and interpreting it.
First, a specific claim about the population parameter is proposed. The claim is based on the research question and is stated in a simple form. Further, an opposing statement to the claim is also stated. These statements can act as null and alternative hypotheses: a null hypothesis would be a neutral statement while the alternative hypothesis can...
First, a specific claim about the population parameter is proposed. The claim is based on the research question and is stated in a simple form. Further, an opposing statement to the claim is also stated. These statements can act as null and alternative hypotheses: a null hypothesis would be a neutral statement while the alternative hypothesis can...
5.2K
Range Rule of Thumb to Interpret Standard Deviation
8.9K
The range rule of thumb in statistics helps us calculate a dataset's minimum and maximum values with known standard deviation. This rule is based on the concept that 95% of all values in a dataset lie within two standard deviations from the mean.
For instance, the range rule of thumb can be used to find the tallest and the shortest student in a class, given the mean student height and standard deviation. If the mean student height is 1.6 m and the standard deviation, s is 0.05 m, the height...
For instance, the range rule of thumb can be used to find the tallest and the shortest student in a class, given the mean student height and standard deviation. If the mean student height is 1.6 m and the standard deviation, s is 0.05 m, the height...
8.9K

