scholarly journals A review on morphological studies of phosphors by combustion route synthesis: The role of fuels

2021 ◽  
Vol 1913 (1) ◽  
pp. 012026
Author(s):  
Ashish D Pise ◽  
Abhijeet R Kadam ◽  
Sakshi Sahare ◽  
S J Dhoble
Keyword(s):  
Morphological Studies ◽  
Combustion Route

scholarly journals Conzenian Tradition in Polish Urban Historical Morphology

2015 ◽  
Vol 21 (2) ◽  
pp. 133-153 ◽  
Author(s):  
Mariusz Kulesza
Keyword(s):  
Urban Landscape ◽  
Scientific Discipline ◽  
Point Of View ◽  
Anglo Saxon ◽  
Scientific Heritage ◽  
Morphological Studies ◽  
Huge Impact ◽  
Historic Development ◽  
The City

The scientific heritage of M. R. G. Conzen, who is considered one of the most outstanding historical geographers and urban morphologists in the world, has made a huge impact on the contemporary urban historic morphology. Nowadays it would be very hard to imagine this scientific discipline without his achievements. He created a new point of view on the city, first within the Anglo-Saxon, and afterwards within European and world geography. Morphogenetic methods, the conceptualisation of historic development, terminological precision as well as cartographic analysis that were typical of his approach, more and more often were considered essential for the development and the role of research on historic urban landscape. This resulted in the increasing interest in morphological studies on an international scale. In Poland, M. R. G. Conzen’s opinions have become recognizable since 1960, finding permanent place in urban historic morphology and providing stimuli for its significant development in the following decades.

Molecules match morphology: mitochondrial DNA supports Bayer's Lytreia - Bebryce - Heterogorgia (Alcyonacea : Octocorallia) clade hypothesis

2010 ◽  
Vol 24 (1) ◽  
pp. 23 ◽  
Author(s):  
Sergio Vargas ◽  
Michael Eitel ◽  
Odalisca Breedy ◽  
Bernd Schierwater
Keyword(s):  
Mitochondrial Dna ◽  
Molecular Phylogeny ◽  
Phylogenetic Relationship ◽  
Morphological Variation ◽  
Mitochondrial Marker ◽  
Morphological Studies ◽  
Close Phylogenetic Relationship ◽  
Morphological Assessment ◽  
Molecular Characters

Several studies attempting to clarify the taxonomy and systematics of Octocorallia have highlighted the important role of molecular characters in corroborating or rejecting previous hypotheses based on morphological variation. One such hypothesis is that of a close phylogenetic relationship between the genera Lytreia, Bebryce and Heterogorgia proposed by Bayer based on morphological studies of the genera. Herein, we tested Bayer’s hypothesis using the mitochondrial marker mshI. We deduced a molecular phylogeny including members of the families Gorgoniidae and ‘Paramuriceidae’ that corroborated the existence of Bayer’s Lytreia–Bebryce–Heterogorgia clade. In addition, we provide a morphological assessment of the three genera as well as diagnoses for each of them. We also discuss, based on the phylogenetic results obtained, the evolution of sclerite morphology within Bayer’s Lytreia–Bebyce–Heterogorgia clade. Finally, we propose a Tethyan origin for the Lytreia–Bebryce–Heterogorgia clade.

scholarly journals Lung elastic fibres from embryonic to adult birds

2008 ◽  
Vol 14 (S3) ◽  
pp. 113-114
Author(s):  
Ana Honório ◽  
Maria de Lurdes Pinto ◽  
Carlos Gonçalves ◽  
Vasco Bairos
Keyword(s):  
Image Analysis ◽  
Experimental Model ◽  
Analytical Methods ◽  
Lung Development ◽  
Domestic Fowl ◽  
Gallus Gallus ◽  
Elastic Fibres ◽  
Morphological Studies ◽  
Avian Lung

In mammals it is well known the role of the elastic fibres in the lung development and its fundamental importance in the process of distending and recoil of the organ as a whole. The bird's lungs are compact and virtually non-expansible.After morphological studies on elastic fibres distribution and quantification by image analysis we carried out a study on biochemical methods to quantify elastin in the avian lung, using domestic fowl (Gallus gallus) as an experimental model. We made use of two analytical methods for the elastin determination in these animal lungs from the 14th day of hatching until the 42nd day after hatchling.

THE ROLE OF FACTOR VII IN HAEMOSTASIS: A DETAILED MICROSCOPIC ANALYSIS OF THE MORPHOLOGY OF THE EVOLVING HAEMOSTATIC PLUG IN NORMAL AND VII DEFICIENT DOGS

1987 ◽  
Author(s):  
Alan R Giles ◽  
Peter Vendervelden
Keyword(s):  
Critical Role ◽  
Microscopic Analysis ◽  
Pulse Generation ◽  
Factor Vii ◽  
Extrinsic Pathway ◽  
Morphological Studies ◽  
Significant Difference ◽  
Activation Pathways

The role of F.VII in haemostasis remains controversial, both in terms of the functional consequences of the deficiency state and the activation pathways to which it makes its principal contribution In vivo. We have developed a cuticle bleeding time (CBT) model in dogs and used this to investigate the functional consequence of both congenital and acquired F.VII deficiency (SD) (Blood 65:1197, 1985). There was no significant difference between the CBT of these animals when compared to controls. However, the CBT prolonged at a significantly lower Heparin level than that observed in controls. F.VIIa was also infused into F.VIII deficient and normal dogs and FPA measured as an indicator of thrombin generation. Significant change in FPA level occurred in the latter but not the former, suggesting that activation of F.IX rather than F.X was favoured. We have now performed detailed morphological studies of the evolving haemostatic plug (HP) in the injured cuticle of F.VII and normal animals by light (LM) and electron microscopy (EM). Quantification of the EM changes noted were performed by morphometric analysis. The tightness of the intravascular component of the HP was assessed by random measurement of intraplatelet distance. The degree of platelet activation was measured by comparing the area of the open canalicular system (OCS) in comparison to the total platelet area. The appearance of fibrin in the plug was also noted. Qualitative LM revealed little difference between the two sets of animals. The appearance of fibrin at the periphery of HP plug was delayed in SD and was reduced in quantity. However, by morphometry although the pattern was identical in both groups, there was a significant delay in the changes noted in SD. These results suggest that the extrinsic pathway may play an important role in triggering the intrinsic pathway, either by providing for activation of the cofactors V and VIII or pulse generation of F.IXa. This may play a critical role in haemostasis when the vessel injured is larger than those in the nail cuticle of the dog (50 - 150 μm) or when other components of haemostatic mechanism are compromised

scholarly journals Theoretical Morphological Approach to Simple Peritoneal Sclerosis

2005 ◽  
Vol 28 (2) ◽  
pp. 85-89 ◽  
Author(s):  
N. Di Paolo ◽  
E. Gaggiotti
Keyword(s):  
Peritoneal Dialysis ◽  
Clinical Impact ◽  
Morphological Studies ◽  
Morphological Approach ◽  
Vast Range

The term peritoneal sclerosis can be applied to a vast range of peritoneal alterations. At one end of the range we have the slight peritoneal sclerosis constantly associated with peritoneal dialysis, which may be defined as simple sclerosis. Its clinical impact is slight. The role of glucose in determining peritoneal sclerosis is supported by morphological studies and therefore backed by much biochemical and immunological data.

Visions of vision: Studies of the horseshoe crab compound eye

1992 ◽  
Vol 50 (1) ◽  
pp. 488-489
Author(s):  
Steven C. Chamberlain
Keyword(s):  
Horseshoe Crab ◽  
Light Adaptation ◽  
Compound Eye ◽  
Visually Guided ◽  
Morphological Process ◽  
Morphological Studies ◽  
Visual Processes ◽  
Lateral Eye ◽  
The Brain

The lateral eye of the horseshoe crab, Limulus polyphemus, is an important model system for studies of visual processes such as phototransduction, lateral inhibition, and light adaptation. It has also been the system of choice for pioneering studies of the role of circadian efferent input from the brain to the eye. For example, light and efferent input interact in controlling the daily shedding of photosensitive membrane and photomechanical movements. Most recently, modeling efforts have begun to relate anatomy, physiology and visually guided behavior using parallel computing. My laboratory has pursued collaborative morphological studies of the compound eye for the past 15 years. Some of this research has been correlated structure/function studies; the rest has been studies of basic morphology and morphological process.

Potential Role of Intrapulmonary Shunting in the Genesis of Hypoxemic Episodes in Infants and Young Children

PEDIATRICS ◽  
1992 ◽  
Vol 90 (3) ◽  
pp. 385-391 ◽  
Author(s):  
Christian F. Poets ◽  
Martin P. Samuels ◽  
David P. Southall
Keyword(s):  
Young Children ◽  
Potential Role ◽  
Rapid Development ◽  
Upper Airway ◽  
Gas Diffusion ◽  
Treatment And Prevention ◽  
Morphological Studies ◽  
Intrapulmonary Shunting ◽  
Infants And Young Children

A number of physiologic phenomena during some apneic/cyanotic episodes in infants and young children cannot be explained sufficiently on the basis of a cessation or reduction in aveolar ventilation alone. These include (1) the extremely rapid development of hypoxemia during some episodes, (2) the occurrence of hypoxemic episodes despite continuous ventilation, (3) differences in the speed of desaturation between different forms of apneic episodes, (4) the presence of continued breathing efforts and yet absent airflow despite bypass of the upper airway, and (5) evidence that apnea and hypoxemia may begin simultaneously. Potential mechanisms to explain these phenomena include the sudden development of an unevenness in the matching between ventilation and lung perfusion, the flow of blood through unventilated areas of lung, and a sudden impairment in gas diffusion. Evidence from physiological and morphological studies suggests that all of these mechanisms, although to a different extent, may be involved in apneic/cyanotic episodes. The recognition that nonapneic mechanisms can cause sudden profound hypoxemia may alter our approach to the identification, treatment, and prevention of these episodes.

scholarly journals Differences in Chemical Sexual Signals May Promote Reproductive Isolation and Cryptic Speciation between Iberian Wall Lizard Populations

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Marianne Gabirot ◽  
Pilar López ◽  
José Martín
Keyword(s):  
Reproductive Isolation ◽  
Chemical Compounds ◽  
Tongue Flick ◽  
Cryptic Speciation ◽  
Sexual Signals ◽  
Central Spain ◽  
Morphological Studies ◽  
Podarcis Hispanica ◽  
Femoral Gland Secretions

Interpopulational variation in sexual signals may lead to premating reproductive isolation and speciation. Genetic and morphological studies suggest that the Iberian wall lizard, Podarcis hispanica, forms part of a “species complex” with several cryptic species. We explored the role of chemical sexual signals in interpopulational recognition between five distinct populations of Iberian wall lizards in Central Spain. Results showed that these populations differed in morphology and in composition and proportion of chemical compounds in femoral gland secretions of males. Tongue-flick experiments indicated that male and female lizards discriminated and were more interested in scents of lizards from their own area (i.e., Northern versus Southern populations), but did not discriminate between all populations. Moreover, only males from the populations that are geographically located more far away preferred scent of females from their own population. These data suggest that, at least between some populations, there may be reproductive isolation mediated by chemical signals and cryptic speciation.

scholarly journals Deciphering the Antibacterial Role of Peptide From Bacillus subtilis subsp. spizizenii Ba49 Against Staphylococcus aureus

2021 ◽  
Vol 12 ◽  
Author(s):  
Ramita Taggar ◽  
Sanpreet Singh ◽  
Vijayender Bhalla ◽  
Mani Shankar Bhattacharyya ◽  
Debendra K. Sahoo
Keyword(s):  
Staphylococcus Aureus ◽  
Bacillus Subtilis ◽  
Fibroblast Cell ◽  
Antibiofilm Activity ◽  
Low Concentration ◽  
Morphological Studies ◽  
Alternate Therapy ◽  
Antibiotic Effect ◽  
Conventional Antibiotics

An increase in antibiotic resistance has led to escalating the need for the development of alternate therapy. Antimicrobial peptides (AMPs) are at the forefront of replacing conventional antibiotics, showing slower development of drug resistance, antibiofilm activity, and the ability to modulate the host immune response. The ESKAPE (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species) pathogens that jeopardize most conventional antibiotics are known to be involved in severe respiratory tract, bloodstream, urinary tract, soft tissue, and skin infections. Among them, S. aureus is an insidious microbe and developed resistance against conventional antibiotics. In the present study, an AMP (named as peptide-Ba49) isolated from Bacillus subtilis subsp. spizizenii strain from Allium cepa (the common onion) exhibited strong antibacterial efficacy against S. aureus ATCC 25923. The mode of action of this peptide-Ba49 on S. aureus was deciphered through various sensitive probes, i.e., DiSC3 (5) and H2DCFDA, suggesting the peptide-Ba49 to be acting upon through change in membrane potential and by triggering the production of reactive oxygen species (ROS). This induced disruption of the cell membrane was further supported by morphological studies using scanning electron microscopy (SEM). Investigations on a possible post-antibiotic effect (PAE) of peptide-Ba49 showed prolonged PAE against S. aureus. Furthermore, the peptide-Ba49 prevented the formation of S. aureus biofilm at low concentration and showed its potential to degrade the mature biofilm of S. aureus. The peptide-Ba49 also exhibited intracellular killing potential against S. aureus ATCC 25923 in the macrophage cells, and moreover, peptide-Ba49 was found to bolster the fibroblast cell migration in the scratch assay at low concentration, exhibiting a wound healing efficacy of this peptide. These studies demonstrated that peptide-Ba49 isolated from the strain B. subtilis subsp. spizizenii could be a therapeutic candidate to combat the pathogenic S. aureus infections.

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