This paper presents a new application of the normal mode decomposition to measure the reflection and absorption coefficients of a low growing living plant in a large 300 300 mm impedance tube. In this way the higher frequency limit can be extended by a factor of 3 in comparison to that suggested by the standard ISO 10534-2 method for this type of an impedance tube. The adopted method (Prisutova...

OBJECTIVES To investigate if extracts from dried ivy leaves (Hedera helix L.) are effective in the treatment of chronic airway obstruction in children suffering from bronchial asthma. DESIGN Systematic review of trials documented in the literature with re-analysis of original data. TRIALS 5 randomized controlled trials investigating the efficacy of ivy leaf extract preparations in chronic b...

The aim of the current study was to systematically assess the effectiveness of herbal medicines in treating chronic obstructive pulmonary disease (COPD). Randomised clinical trials (RCTs) testing herbal medicines against any type of control intervention in patients with COPD and assessing clinically relevant outcomes were included. The selection of studies, data extraction and validation were p...

BACKGROUND Naturally occurring nanoparticles isolated from English ivy (Hedera helix) have previously been proposed as an alternative to metallic nanoparticles as sunscreen fillers due to their effective UV extinction property, low toxicity and potential biodegradability. METHODS This study focused on analyzing the physicochemical properties of the ivy nanoparticles, specifically, those param...

After germination, plants enter juvenile vegetative phase and then transition to an adult vegetative phase before producing reproductive structures. The character and timing of the juvenile-to-adult transition vary widely between species. In annual plants, this transition occurs soon after germination and usually involves relatively minor morphological changes, whereas in trees and other perenn...

In the frame of identification Ukrainian Polissya rare vegetation most attention is paid to boreal species and groups. Deciduous forests with sinuses spring ephemeroids remain unstudied in that's why urgency their research Volyn important, especially Kivertsy National Nature Park "Tsumanska Pushcha". The composition plant on territory plots "Volyn Military Forestry" "Tsumanske within Pushcha" w...

Abstract Colonisation credit refers to the temporal lag between positive conservation actions and species' responses may be one of reasons we fail meet short‐term targets. This is particularly evident in woodlands which take decades develop harbour slow colonising species. Given global objectives increase woodland cover, it important know timeframe within colonisation will fulfilled. The plants...

t. ikawa obtained an ordinary differential equation for the circular helix. recently, the helix havebeen investigated by many differential geometers such as t. ikawa, h. balgetir, m. bektas, m. ergut, n.ekmekci and h. h. hacısalihoglu. in this paper, making use of this author’s methods, we obtainedcharacterizations of helix for a curve with respect to the frenet frame in 3-dimensional galilean ...