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Search Results: 1 - 10 of 4727 matches for " morphology "
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Morphological and molecular characteristics of malaria vector anopheles superpictus populations in Iran
Shemshad K.,Oshaghi1 MA.,Yaghoobi-Ershadi MR.,Vatandoost1 H.
Tehran University Medical Journal , 2007,
Abstract: Background: Anopheles superpictus is one of the main malaria vectors in Iran. The mosquitoes of this species are found throughout the Iranian plateau up to 2000 meters above sea level in the Alborz Mountains, south of the Zagros Mountains, and in the plains near the Caspian Sea and Persian Gulf. It has been reported that different geographical populations of An. superpictus play different roles in malaria transmission. Based on the presence or absence of a black spot/band on the apical segment of the female maxillary palpi, two morphological forms have been reported in this species. This work has been conducted to study other morphological features as well as the genetic structure of these two forms of An. superpictus in Iran. Methods: The different morphological characteristics of 35 different populations were observed and recorded. An 887 bp portion of the mitochondrial DNA (mtDNA) cytochrome oxidase subunit I (COI) was amplified and assayed by restriction fragment length polymorphism (RFLP) using 18 enzymes and PCR-direct sequencing techniques.Results: Among the morphological characteristics studied, there are significant differences between the two forms with regard to the length of the palp light band (p<0.01), wing length (p<0.5), and the distance from the branching point of the II/IV veins to the tip of the wing (p<0.05). Results also revealed that these two forms are sympatric in most localities of Iran. RFLP analysis and sequences of about 710 bp of the gene showed that there was great variation between and/or within the populations, but these variations were not associated with the morphological forms.Conclusion: This is the first comprehensive study on the morphological and molecular characteristics of An. superpictus in the literature. To determine the role of these morphological forms or genetic haplotypes in malaria transmission, further molecular, cytological, morphological, and epidemiological studies are necessary.
V.N. Nikolenko,О.А. Fomicheva
Saratov Journal of Medical Scientific Research , 2007,
Abstract: The aim of the present was a more detailed study of questions connected with individual variability of the macro-microscopical structure and architectonic of humeral bones, and determination of the main morphometric and osteometric parameters of the above mentioned bones. Measuring of main anthropometric indexes was made with the subsequent calculation of different indexes. Preliminary all subjects have been divided into groups depending on somatic type. It was established that the macro-microscopical structure of humeral bones, irrespective of the age of studied subjects, depends on their somatic type.
A.V. Andreeva,V.N. Nikolenko
Saratov Journal of Medical Scientific Research , 2007,
Abstract: In work quantitative data about a circle, cross-section (transversal) both longitudinal diameters of the establishment and height of a body of a mamma, length submammary cords (crimps), diameters and height of a papilla (papilla mammaria) and diameter of a peripapillary circle (areola mammae) at girls-Slavs of 17-20 years (n = 228) for the first time are presented.
The Internal Structure of Sha-henda: A Morphological Perspective  [PDF]
Jiacing Ruan
Open Journal of Modern Linguistics (OJML) , 2014, DOI: 10.4236/ojml.2014.44045
Abstract: Sha-henda (殺很大) “kill-very-big” which is coined from an advertisement of an on-line game has been being recently very popular in Taiwan society. With the effect of this slogan, people tends to analogize more and more new expressions, for example: sheng-henda (省很大) “save-very-big”, shui-henda (睡很大) “sleep-very-big”, and etc. Until 2013, the quantity of the coined expressions is still increasing. In the previous studies of Shen (2009), Xiao (2009), Liu (2010) and Liu (2012) on the structure of X-henda (X-很大), the structure is highly productive, involves an extreme or exaggerative meaning, is featured of rising tone, stress, and lengthening, and is initiated with a verb or an adjective. This present study argues henda in X-henda is a bound form (or a particle (助詞); Chao, 1979), similar to qilai (起來) in X-qilai or bude (不得) in X-bude, especially without objects or objects-preceding. With Distributed Morphology, a derivational analysis of the X-henda structure indicates that the function of henda intensifies the effect of sha to the extreme degree with rising tone, stress and lengthening to perform exaggeration on the object (in a sentence). The results may further contribute to grammaticalization analyses, verb-complement structure analyses and Chinese language teaching.
Morphological Knowledge and Decoding Skills of Deaf Readers  [PDF]
M. Diane Clark, Gizelle Gilbert, Melissa L. Anderson
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.22018
Abstract: Many studies have reported the necessity of phonological awareness to become a skilled reader, citing barriers to phonological information as the cause for reading difficulties experienced by deaf individuals. In contrast, other research suggests that phonological awareness is not necessary for reading acquisition, citing the importance of higher levels of syntactic and semantic knowledge. To determine if deaf students with higher language skills have better word decoding strategies, students responded to a morphological test, where monomorphemic words and multimorphemic words were matched to their definitions. Two studies are reported, one focusing on English placement levels and a second with formal measures of both ASL and English language proficiency. Results in-dicated that performance on the morphological decoding test was related to language proficiency scores, but not to phonological awareness scores.
Morphological Studies on the Epididymal Duct of the One-Humped Camel (Camelus Dromedaries)  [PDF]
Ahmed E. Zayed, Khaled Aly, Ismail A. Ibrahim, Fatma M. Abd El-Maksoud
Open Journal of Veterinary Medicine (OJVM) , 2012, DOI: 10.4236/ojvm.2012.24040
Abstract: The present work was carried out on 20 epididymes of sexually mature one humped camel to elucidate the gross anatomical, scanning electron microscopical and light microscopical features of the epididymal duct. Anatomically, the epididymal duct of camel consists of three parts i.e. head, body and tail. Histomorphologically, the epididymal duct is subdivided into initial, middle and terminal segments, of which the middle segment is further subdivided into proximal, intermediate and distal parts. The epithelium lining the epididymal duct is ciliated pseudostratified columnar comprising mainly five cell types, namely principal, basal, apical, dark and halo cells. It displays numerous intraepithelial glands in the middle segment. In general, there is a gradual increase in the total diameter and decrease in the epithelial height of the epididymal duct from the initial to the terminal segments; that may, mechanically, facilities passage of the sperms toward the terminal segment. The lamina propria of the epididymal duct contains a layer of interlacing elastic fibers which may allow adequate elasticity of the duct that could help in its expansion. Moreover it is surrounded by numerous layers of circularly and obliquely arranged smooth muscle fibers which always increase in thickness toward the terminal segment.
The Differentiation of Phonological and Morphological Intrusion for the Two-Dimensional Orthography  [PDF]
Yang Lee, Claudia Carello
Psychology (PSYCH) , 2016, DOI: 10.4236/psych.2016.79123
Abstract: The writing systems have been developed by regard that how sound is written to express phonology in letters. So to interpret the written words, the phonological orthography is deemed to have serious contribution. In researches, the decoding processes of phonology have been concerned, proposing some theories as orthographic depth hypothesis, and phonological primary principle. However the other aspect of orthography has been raised with regard of how to reserve morphology in writing. Also to understand the written words, the analysis of the morphological orthography is viewed to help readers. So in researches, some of morphological effects have been analyzed. This study presupposed two-dimensional category of phonology and morphology to set various writing systems. Attempting to confirm the two dimensions, an experiment was designed to analyze both of phonological and morphological effect. For the purposes, the intrusion effect of phonology or morphology was proposed as what is sensitive to working of the two dimensions. This study observed the intrusion of phonology which influenced on the semantic task which required judging whether same or different in meaning between prime and target. And also the intrusion of morphology was observed when judging sounds between prime and target was required. This study sampled Korean and Chinese words both of which belong to Korean language, and each of which is posited by this study to be distributed differently in the two dimensions of phonology and morphology. The analysis of the results showed both of the sound and meaning intrusion, concluding that Korean writing system kept the two-dimensional category of phonology and morphology. Therefore this study pointed out the limit of one-dimensional category hitherto accepted, where each of the phonological and morphological orthography is posed at each of the two extremes in one-dimension, requiring the further tests on the other languages to make generalization of the two-dimensional category of phonology and morphology proposed and supported by this study.
Mathematical Morphological Distributive Concepts over Unions and Intersections  [PDF]
Joseph Ackora-Prah, Robert K. Acquah, Yao Elikem Ayekple
Advances in Pure Mathematics (APM) , 2016, DOI: 10.4236/apm.2016.610052
Abstract: Mathematical Morphological concepts outline techniques for analysing and processing geometric structures based on set theory. In this paper, we present proofs of our theorems on morphological distributive properties over Unions and Intersections with respect to Dilation and Erosion. These results provide new realizations of Dilation, Erosion and conclude that they are distributive over Unions but non-distributive over Intersections.
Synthesis, Morphology and Magnetic Characterization of Zn Ferrite Powders  [PDF]
S. A. Popescu, P. Vlazan, P. V. Notingher, S. Novaconi, I. Grozescu, A. Bucur, P. Sfirloaga
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2010, DOI: 10.4236/jemaa.2010.210078
Abstract: We synthesized Zn0.8Fe2.2O4 ferrite powders by coprecipitation and hydrothermal techniques and analyzed the mor-phology and magnetic properties. The morphology and structure of the Zn ferrite powders were investigated using Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) identifying the crystallization planes. Magnetic hysteresis curves were obtained for the Zn ferrites samples.
Pollen Morphology of Tribes Gnaphalieae, Helenieae, Plucheeae and Senecioneae (Subfamily Asteroideae) of Compositae from Egypt  [PDF]
Ahmed Kamal El-Deen Osman
American Journal of Plant Sciences (AJPS) , 2011, DOI: 10.4236/ajps.2011.22014
Abstract: POLLEN morphology of twenty five species representing 12 genera of tribes Gnaphalieae, Helenieae, Plucheeae and Senecioneae (Asteroideae: Asteraceae) was investigated using light and scanning electron microscopy. The genera are Phagnalon, Filago, Gnaphalium, Helichrysum, Homognaphalium, Ifloga, Lasiopogon, Pseudognaphalium, Flaveria, Tagetes, Sphaeranthus and Senecio. Two pollen types were recognized viz. Senecio pollen type and Filago pollen type. Description of each type, a key to the investigated taxa as well as LM and SEM micrographs of pollen grains are provided.
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