scholarly journals Plant life assessment by the total fluctuating asymmetry index in the RUDN University campus

2018 ◽  
Vol 26 (3) ◽  
pp. 335-345
Author(s):  
Roman Khasanovich Mamadzhanov

The article proposes a new method of plant life assessment by the total fluctuating asymmetry index that includes seven asymmetry parameters of leaves growing in three experimental areas near the Leninsky Prospekt and Miklukho-Maklaya highways. The data on 18 morphological parameters of leaves of the tree species growing in these experimental areas has been presented. The potential impact of the Leninsky Prospekt and Miklukho-Malkaya highways on the morphological parameters of leaves has been estimated.

Author(s):  
U. Semak ◽  
◽  
M. Mylen’ka ◽  

The article presents the study of leaf morphological features of Populus tremula L. Growing under the conditions of the influence emissions from Burshtynska TPP. The methods of linear morphometry were used to analyze the variability of the morphological parameters of leaves at high levels of pollutants. In the zone of influence of the industrial object there is a significant decrease in the foliar parameters. Uneven variability of morphological parameters between the study plots of industrial pollution and with minimized technogenic load are revealed. Levels of variability of morphological parameters are estimated using coefficient of variation, which for most of the analyzed morphological features at the polluted plot load is characterized by high and average values. The most varied ones were the distance between the first and second veins and the length of the second vein from the base of the leaf vein. For bioindication of anthropogenic load, an index of fluctuating asymmetry of P. tremul leaf blades has been tested. The analysis of the fluctuating asymmetry was based on leaf linear measurements and area of ​​ the halves of leaf blades. The results indicated an increase in fluctuating asymmetry index in plant growing at the polluted plot, both in linear measurements and in area indices. The comparison of the two approaches to the estimation of the level of fluctuating asymmetry has been carried out. As a result of this study, those foliar morphometric parameters of P. tremula, which exhibit high morphological reactivity under the influence of anthropogenic load, can be used as bioindicatory markers for assessing the state of the environment. A reliable indicator of technological pressure is the level of fluctuating asymmetry that can be recommended for use in bioindicative studies.


1981 ◽  
Vol 67 (4) ◽  
pp. 315-323 ◽  
Author(s):  
Vincenzo Eusebi ◽  
Pier Tito Cerasoli ◽  
Simonetta Guidelli-Guidi ◽  
Sandro Grilli ◽  
Gianni Bussolati ◽  
...  

An immunocytochemical method for oestrogen receptor (ER) analysis of breast carcinomas is described and compared with the dextran-coated charcoal (DCC) assay and a cytochemical method. The method described is superior to the purely cytochemical, especially in terms of sensitivity, demonstration of nuclear receptors and correlation with the DCC assay. The DCC assay is reliable except in the case of poorly cellular tumours: in these the immunocytochemical method is far superior, being independent of tumour cellularity. With this new method, lobular carcinomas are shown to be ER-rich compared with their ductal counterparts, a conclusion currently disputed, largely because methods employed mostly fail to take account of tumour cellularity. A combination of the DCC assay and the immunocytochemical method here described gives the maximum information about the ER-status of a particular carcinoma.


Author(s):  
P. C. Nnadi ◽  
B. B. Otene ◽  
Nwiisator David-Sarogoro

This study was carried out to examine the distribution of plant species in Rivers State University campus at different locations at the Rivers State University Nkpolu-Oroworukwo Port Harcourt Nigeria. The general objective of this study was to examine the Ecological distribution of plant species in Rivers State University campus at different locations. The specific objective was to determine the species abundance of various plants in the study area and also to examine the ecological diversity of tree species in the various groups. The study area was divided into three groups (stations) with the various plants species identified and recorded. Data gotten from the field was analyzed using descriptive statistic and some ecological indices such as Margalef, Mehinick, Shannon diversity, Shannon Wiener, Evenness/Equitability and Simpson dominance.  A total of one thousand Sixty-nine (1069) individual plant were identified with 16, 17 and 12 species in stations 1-3 respectively. The highest individual plants (561) were observed in station 1 while the least (87) were observed in station 3. The mean values of stations 1 and 2 were significantly and statistically different from site 3 at p<0.05. The results obtained showed some dominant species to include Elaeis guincensis, Polyaithia longifolia, Pinus spp, Gmelina arborea, Wodyetia bifareata, Citrus sinensis, Cocos nuciferia while others were the least dominant species found in the study area. The Margalef, Mehinicks and Shannon Wiener values were consistently highest in station 2 but lowest in station 3.  Human disturbances had negative impact on tree species abundance especially in site 3. It is therefore recommended that management interventions are necessary in other to stop indiscriminate felling of the various trees species that made up the different groups.


Symmetry ◽  
2015 ◽  
Vol 7 (2) ◽  
pp. 327-335 ◽  
Author(s):  
Cino Pertoldi ◽  
Torsten Kristensen

2006 ◽  
Author(s):  
Jianwen Xiong ◽  
Weiping Dai ◽  
Li Chen ◽  
Guixiang Liu ◽  
Mingsheng Liu ◽  
...  

2013 ◽  
Vol 13 (4) ◽  
pp. 117-122
Author(s):  
J. Zych

Abstract The obtained results of the investigations of influences of the selected technological factors on the bench life (work time) of moulding and core sands with chemical binders are presented in the hereby paper. The bench life assessment is performed by the new, author’s method with the application of the ultrasound technique. This method was patented by the author. The influence of such factors as: matrix (surroundings) temperature, matrix water content, ratio of binding components hardener/binder (h/b) and the reclamation - on the bench life of furan moulding sands was determined. The empirical dependencies (regressions) were determined, which allowed forecasting the bench life (BL) of moulding sands as functions: BL = f(W%), BL = f(T) for the fresh and after the reclamation sands, BL = f(h/b). These dependencies should be treated as examples of the new method application for investigating the bench life of moulding sands with chemical binders.


2020 ◽  
Vol 1 (6) ◽  
pp. 6-9
Author(s):  
Zunaira Maqsood ◽  
Filza Ghafoor ◽  
Khazeema Naeem ◽  
Mujahid Niaz

This study was primarily focused on determining the availability of feeding niche of the little owl in University Campus. For this purpose, observations were made consecutively on the location of important sites in University Student’s Farm. This Farm is characterized by different types of tree species. Some of the important ones comprise Salmalia malabarica, Dalbergia sissoo, Cedrella toona, Terminalia arjuna and few others. The little owl mainly feeds on small insects and occasionally on very small mammals and perhaps on the small chicks. Small insects made the major portion of the diet of Athene noctua.


2020 ◽  
Vol 224 ◽  
pp. 04044
Author(s):  
G Kozlov ◽  
M Pushkarev ◽  
I Belyaeva ◽  
A Maksimova ◽  
S Shvidkoy ◽  
...  

The paper provides information on the index of fluctuating asymmetry of the Pitsunda pine in industrial and recreational areas in the city of Tuapse (the Russian Black Sea coast of the Caucasus). It is shown that pollution is localized in the port area, and in the city center, the fluctuating asymmetry index is comparable to that for resort areas at a considerable distance from the Tuapse port. The necessity of taking into account the climate when using the coefficient of fluctuating asymmetry of the needles of the Mediterranean (Pitsunda) pine in assessing the degree of ecological well-being of various areas is shown.


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