scholarly journals Comparative study of the oospore morphology of two populations of a rare species Chara baueri A. Braun in Cedynia (Poland) and Batzlow (Germany)

2012 ◽  
Vol 81 (2) ◽  
pp. 131-136 ◽  
Author(s):  
Andrzej Pukacz ◽  
Patrycja Boszke ◽  
Mariusz J. Pełechaty ◽  
Uwe Raabe
Keyword(s):  
Comparative Analysis ◽  
Comparative Study ◽  
Rare Species ◽  
Polar Axis ◽  
German Population ◽  
Apical Pole ◽  
Equatorial Diameter ◽  
Habitat Differentiation ◽  
Two Populations ◽  
Species Ecology

Morphological features of oospores of <em>Chara baueri </em>A. Braun, one of the rarest charophyte species worldwide, were studied based on 100 oospores collected from a small and temporarily dried mid-field pond near Cedynia, Western Poland. This is the first Polish and fifth presently known locality of this species. For comparison 67 oospores from a German population (similar pond localized near Batzlow, Germany) were also measured. So far, data on morphology of <em>C. baueri </em>oospores as well as the species ecology are limited. The only more detailed study of oospores for this species was earlier performed on 15 oospores from Kazakhstan. Largest polar axis (<em>LPA</em>, length), largest equatorial diameter (<em>LED</em>, width), isopolarity index (<em>ISI </em>= <em>LPA</em>/<em>LED </em>× 100), number of ridges, width of fossa, distance from apical pole to <em>LED </em>(<em>AND</em>) and anisipolarity index (<em>ANI </em>= <em>AND</em>/<em>LPA </em>× 100) were measured. The comparative analysis revealed that the oospores from Poland are generally bigger and more prolate than the Ger­man ones. The differences for most of studied parameters were statistically significant. The finding is discussed in the context of habitat differentiation of both studied sites. Moreover, the results obtained of oospore measurements for both populations differs from most of the data known so far from the literature.

scholarly journals Spore morphology of Vaginularia Fée species (Pteridaceae) from South-Eastern Asia A.

2017 ◽  
Vol 7 (4) ◽  
pp. 231-233
Author(s):  
A. V. Vaganov ◽  
I. I. Gureyeva ◽  
A. A. Kuznetsov ◽  
R. S. Romanets
Keyword(s):  
Comparative Study ◽  
Smooth Surface ◽  
Polar Axis ◽  
Spore Morphology ◽  
Scanning Electronic Microscopy ◽  
Eastern Asia ◽  
Electronic Microscopy ◽  
South Eastern ◽  
Equatorial Diameter ◽  
Axis Length

A comparative study of spores of two species of Vaginularia (Vittarioideae, Pteridaceae) from South-Eastern – Vaginularia paradoxa (Fée) Mett. ex Miq. and V. trichoidea Fée – was performed by the method of scanning electronic microscopy (SEM). Spores are tetrahedral, trilete; they are very similar to each other in smooth surface and relatively narrow laesura arms. Differences between species are in shape of spores in proximal position (triangular with narrowly-rounded corners and concave sides in V. paradoxa and triangular with broadly-rounded corners and slightly concave sides in V. trichoidea), in length of laesura arms relative to the radius of the spore (laesura arms are about 0.75 of spore radius in V. paradoxa, and riches corners of spore in V. trichoidea) and in size of spore (spore of V. paradoxa are about 1.5 times more in equatorial diameter and 1.7 times more in polar axis length).

Impact of Globalisation on Pandemics: A comparative study on SARS and Covid-19 (Preprint)

2020 ◽  
Author(s):  
Johann Johann And Devika
Keyword(s):  
Comparative Analysis ◽  
Comparative Study ◽  
Descriptive Analysis ◽  
Qualitative Comparative Analysis ◽  
Global Scale ◽  
Global Level ◽  
Economic Stability ◽  
The Past ◽  
The World ◽  
Close Relationship

BACKGROUND Since November 2019, Covid - 19 has spread across the globe costing people their lives and countries their economic stability. The world has become more interconnected over the past few decades owing to globalisation and such pandemics as the Covid -19 are cons of that. This paper attempts to gain deeper understanding into the correlation between globalisation and pandemics. It is a descriptive analysis on how one of the factors that was responsible for the spread of this virus on a global scale is globalisation. OBJECTIVE - To understand the close relationship that globalisation and pandemics share. - To understand the scale of the spread of viruses on a global scale though a comparison between SARS and Covid -19. - To understand the sale of globalisation present during SARS and Covid - 19. METHODS A descriptive qualitative comparative analysis was used throughout this research. RESULTS Globalisation does play a significant role in the spread of pandemics on a global level. CONCLUSIONS - SARS and Covid - 19 were varied in terms of severity and spread. - The scale of globalisation was different during the time of SARS and Covid - 19. - Globalisation can be the reason for the faster spread in Pandemics.

A comparative study of children’s Chinese character textbooks in Korea and China, with a focus on Yu Hap

2021 ◽  
Vol 5 (2) ◽  
pp. 145-153
Author(s):  
Jeong Yeon Sil ◽  
Jang Eun Young ◽  
Park Heung Soo
Keyword(s):  
Comparative Analysis ◽  
Comparative Study ◽  
Chinese Character ◽  
Significant Proportion ◽  
Written Language ◽  
Chinese Characters ◽  
Children's Books ◽  
High Learning ◽  
Modern Chinese ◽  
Ancient Times

This study examines why and how Chinese characters spread into Korea. It subsequently conducts a comparative analysis of Korean and Chinese children’s textbooks with a focus on Yu Hap from the perspective of the acceptance and acculturation of Chinese characters. It also explores how commonly used the characters in Yu Hap are, and the text’s learning value as one of Korea’s children’s textbooks. Yu Hap is very significant as the first written language textbook published in Korea. A comparative analysis of the characters used in four children’s books published in Korea found that the characters in Yu Hap are very common, and the text has a high learning value. Approximately 50% of the characters in San Bai Qian and Yu Hap are the same, showing that both China and Korea had similar perceptions of the characters in common use. A very significant proportion of characters overlap in Basic Chinese Character for Educational Use, List of Common Words in Modern Chinese, and Yu Hap; this supports the idea that the same characters have continued to be used from ancient times to the present day.

A Comparative Study on the Noise between Floors of Apartment and Multiplex Housing

2015 ◽  
Vol 752-753 ◽  
pp. 1232-1235
Author(s):  
Ji Hun Kim ◽  
Yoon Seok Shin
Keyword(s):  
Comparative Analysis ◽  
Comparative Study ◽  
Field Measurements ◽  
Apartment Building ◽  
Noise And Vibration ◽  
Korean Government ◽  
Current State ◽  
The Future ◽  
House Type ◽  
Almost All

Since recently almost all housing built in Korean have shared walls and floor, diverse problems are unavoidable including noise between floor arising from noise and vibration. Many efforts have been made by the Korean government, but the number of complaints related with the noise between floors has been gradually increasing. Therefore, through the field measurements by house type, the current state of noise was understood. To do this, the noise between floors was measured in an apartment household and a multiplex house to perform a comparative analysis. As the result, the differences in the noise between the two house types were clarified. The findings of this research are expected to contribute to reduction of the noise between floors in an apartment building in the future.

Oospore dimensions and wall ornamentation in Chara braunii

Biologia ◽  
2008 ◽  
Vol 63 (4) ◽  
Author(s):  
Patrycja Boszke ◽  
Mariusz Pełechaty ◽  
Andrzej Pukacz
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Local Population ◽  
Polar Axis ◽  
Morphological Features ◽  
Cylindrical Shape ◽  
Reproductive Structures ◽  
Equatorial Diameter ◽  
Variable Character ◽  
Scanning Electron

AbstractMorphological features of oospores of a rarely noted species Chara braunii Gmel. were examined in a local population (fishpond near Tuplice village, Ziemia Lubuska region, mid-western Poland). The largest polar axis (LPA, length), largest equatorial diameter (LED, width), isopolarity index (ISI = LPA/LED* 100), and the number of ridges and width of fossa of 90 oospores were measured. Additionally, the oospore wall ornamentation pattern was examined by means of scanning electron microscopy (SEM). As a result, a cylindrical shape and the lack of so-called “shoulder” were found. Oospore length and width ranged between 466.8–600.1 µm and 250.1–366.7 µm, respectively, with the ISI index values between 148 and 213. The number of ridges was 8–10 and the width of fossa varied between 50.0 and 66.7 µm. The oospore width appeared to be the most changeable feature, whereas, by contrast, the number of ridges was the least variable character. Wall ornamentation can be described as tuberculate and a ribbon was present on the ridges. As a comparative material for the study performed, 9 oospores from Professor Izabela Dąmbska’s Collection of Charophytes of Poland were measured. It was evidenced that variation ranges of most of the features of Chara braunii oospores from Tuplice fishpond are similar to those of Professor Dąmbska’s herbarium materials and to data reported by authors from other countries as well. The morphology of reproductive structures does not follow the variation of thalli characteristics.

Continuity and Peculiarities in Proto-Kazakh and Ancient Indian Early Religious Beliefs

2021 ◽  
Vol 3 (121) ◽  
pp. 185-195
Author(s):  
Zatov Zatov
Keyword(s):  
Comparative Analysis ◽  
Comparative Study ◽  
Ethnic Diversity ◽  
Life Forms ◽  
Religious Knowledge ◽  
Concept Of God ◽  
Common Features ◽  
The World ◽  
The Relationship ◽  
The Universe

A comparative study of the mythological picture of the world, early forms of religion allows us to identify common features characteristic of the worldview and spiritual guidelines of mankind as a whole. These features can be traced in archaic ideas about the structure of the universe, in understanding their spiritual and bodily essence, the infinity of God and the eternity of the soul, the relationship and interdependence of life forms in the world. This allows us to assert the thesis of the unity of mankind in its spiritual origins, despite racial and ethnic diversity. In the process of a comparative analysis of mythology, early forms of religion, the concept of God, the pantheon and the function of the gods, similar moments and ethnological specifics of understanding the essence of the soul and reincarnation in totemistic beliefs, in cosmological and theogonistic concepts are revealed.The author also analyzes the role and significance of the cult of ancestors, traces the evolution of the idea of proto-monotism (the creative function of Tengri and Brahma, the intention of henotheistic faith) and its place in religious knowledge.

scholarly journals Dental fear and anxiety in Estonian and Vietnamese schoolchildren: A comparative study of two populations

2018 ◽  
Vol 4 (5) ◽  
pp. 182-188 ◽  
Author(s):  
Minh Son Nguyen ◽  
Thuy Trang Nguyen ◽  
Bui Bao Tien Nguyen ◽  
Mare Saag ◽  
Jana Olak
Keyword(s):  
Comparative Study ◽  
Dental Fear ◽  
Fear And Anxiety ◽  
Two Populations

scholarly journals A Comparative Study: Change Detection and Querying Dynamic XML Documents

2015 ◽  
Vol 5 (4) ◽  
pp. 840 ◽  
Author(s):  
Vijay R Sonawane ◽  
D.R. Rao
Keyword(s):  
Comparative Analysis ◽  
Comparative Study ◽  
Change Detection ◽  
Version Management ◽  
Xml Documents ◽  
Efficient Management ◽  
Control Schemes

<span>The efficient management of the dynamic XML documents is a complex area of research. The changes and size of the XML documents throughout its lifetime are limitless. Change detection is an important part of version management to identify difference between successive versions of a document. Document content is continuously evolving. Users wanted to be able to query previous versions, query changes in documents, as well as to retrieve a particular document version efficiently. In this paper we provide comprehensive comparative analysis of various control schemes for change detection and querying dynamic XML documents.</span>

scholarly journals Comparative analysis of methods to determine deflection in steel beams: theoretical analysis, finite element and experimental

2020 ◽  
pp. 32-37
Author(s):  
Gabriela Alor-Saavedra ◽  
Francisco Alejandro Alaffita-Hernández ◽  
Beatris Adriana Escobedo-Trujillo ◽  
Oscar Fernando Silva-Aguilar
Keyword(s):  
Differential Equation ◽  
Experimental Data ◽  
Finite Element ◽  
Comparative Analysis ◽  
Theoretical Analysis ◽  
Comparative Study ◽  
Steel Beams ◽  
Physical Systems ◽  
Theoretical Part ◽  
Made In

This work makes a comparative study of two methods to determine deflection in steel beams: (a) Theoretical and (b) Finite element. For method (a) the solution of the differential equation associated with the modeling of the deflection of a beam is found, while for method (b) a simulation is made in Solidworks. Both methods are compared with experimental data in order to analyze which of the methods presents less uncertainty and show the usefulness of the theoretical part in the modeling of physical systems.

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