Morphological variation and the relationship with host leaves in the epiphyllous liverwort Cololejeunea chenii Tixier (Marchantiophyta: Lejeuneaceae)

Phytotaxa ◽  
2019 ◽  
Vol 408 (3) ◽  
pp. 222-226
Author(s):  
SHU-WEN TU ◽  
ZUN DAI ◽  
XIA TANG ◽  
LU-YAN TANG ◽  
TAO PENG ◽  
...  
Keyword(s):  
Morphological Variation ◽  
Transverse Section ◽  
Dorsal Lobe ◽  
Cortical Cells ◽  
Running Water ◽  
Generic Concept ◽  
Extreme Habitats ◽  
The Relationship

Cololejeunea (Spruce 1884: 291) Stephani (1891: 208), with over 400 published binominals, is the largest genus of Lejeuneaceae Cavers (1910: 291) and the most species of the genus are distributed in the tropical and subtropical regions (Zhu & So 2001, Yu et al. 2013). These usually small sized liverworts grow preferably in extreme habitats, such as on the surface of living leaves, on twigs, or in running water (Gradstein et al. 2003). The currently accepted generic concept of the genus is based on its incubous foliation, leaves consisting of a dorsal lobe and a ventral lobule, Lejeunea-type branching, lack of underleaves, and transverse section of stem comprising of 5(–8) cortical cells and 1 medullary cell (Yu et al. 2013, and references therein).

scholarly journals Notes on Early Land Plants Today. 39. Microlejeunea indica (Marchantiophyta, Lejeuneaceae)

Phytotaxa ◽  
2013 ◽  
Vol 97 (2) ◽  
pp. 63 ◽  
Author(s):  
YU-MEI WEI ◽  
RUI-LIANG ZHU
Keyword(s):  
Transverse Section ◽  
Systematic Position ◽  
Land Plants ◽  
New Combination ◽  
Cortical Cells ◽  
Generic Concept ◽  
Molecular Studies ◽  
Early Land ◽  
Medullary Cells

  The systematic position of the pantropical genus Microlejeunea Stephani (1888: 61) has been debated. Grolle (1995) first defined the precise generic concept of Microlejeunea, which was also confirmed by molecular studies (Wilson et al. 2004; Dong et al. 2013). This concept has recently been followed by various authors (e.g., He & Zhu 2011; Lavocat & Schäfer-Verwimp 2011; Thouvenot et al. 2011; Marline et al. 2012; Thiers et al. 2012). Microlejeunea is well characterized and easily separated from Lejeunea Libert (1820: 372) by the presence of ocelli in the leaf lobe, transverse section of stem consisting of seven cortical cells and three medullary cells, and keel of female bract usually winged (Wei & Zhu 2013). Lejeunea indica Udar & Awasthi (1981: 345), known only from India (Udar & Awasthi 1981; Joshi 1995; Zhu & Long 2003; Dey et al. 2008), has all essential characters of Microlejeunea. Thus, a new combination is needed.

scholarly journals The formation of the narrative and the performative in public communication

2020 ◽  
Vol 11 (1) ◽  
pp. 34-49 ◽  
Author(s):  
S. V. Gerasimov
Keyword(s):  
Decision Making ◽  
Speech Act ◽  
External Factors ◽  
Public Communication ◽  
Generic Concept ◽  
Factors Associated ◽  
The World ◽  
The Relationship ◽  
British Philosopher ◽  
John Austin

Since the British philosopher John Austin, narratives and performatives have been con­sidered as opposite concepts covered by the generic concept of speech act. At the same time, these concepts were separated according to whether a narrative, inducement, a description, or an imperative was present in the text. Similar to the narrative, the performative is created under pressure from various external factors associated with the system of public communica­tions, to which the author is exposed, and a multitude of reasons that reflect in his or her mind external processes. All these factors and influences transmute in the course of text crea­tion; the viewer/reader consumes ready-made information, which invariably bears an imprint of the author's habitus. When creating a text, the author conveys his or her desires and ex­presses his or her attitude to the chosen problem. This study aims to answers two questions. Can a narrative have at its core an explicit manipulative basis or a hidden motive? Can the picture of the world, which develops, inter alia, under the influence of narratives, serve as a pattern for decision-making by the viewer/reader? It is necessary to this end to identify the relationship between the performative and the narrative (there are several types of these rela­tionships). To answer the above question, the genesis of narratives is considered, possible nar­rative–performative combinations analysed, and the effects of performatives on the formation of the intentional component of the narrative established. The findings suggest that each nar­rative contains at least one performative and that the narrative is based on the performative and contains a manipulative component.

scholarly journals The Secrets of Beautiful Hair: Why is it Flexible and Elastic?

Cosmetics ◽  
2019 ◽  
Vol 6 (3) ◽  
pp. 40 ◽  
Author(s):  
Mikako Ezure ◽  
Noriyuki Tanji ◽  
Yukari Nishita ◽  
Takashi Mizooku ◽  
Shinobu Nagase ◽  
...  
Keyword(s):  
Physical Properties ◽  
Layered Structure ◽  
Outer Layer ◽  
New Technology ◽  
Selective Reduction ◽  
Cell Distribution ◽  
Cortical Cells ◽  
The Difference ◽  
The Relationship ◽  
Hair Surface

Beautiful hair, so called “SHINAYAKA” hair in Japanese, has a good appearance not only when stationary but also when in motion, and it is a highly desirable hair condition for Japanese consumers. We investigated such SHINAYAKA hair, which was selected by sensory evaluation, for the relationship between physical properties, such as flexibility and elasticity, and hair structure. It has already been reported that human hair cortical cells have two types, similar to wool: the ortho-like cortex and the para-like cortex. Microscopic observation revealed that the ortho-like cortex is distributed in the outer layer of the hair (near the hair surface) and the para-like cortex exists in the inner layer (near the center of the fiber). This cell distribution, a concentric double-layered structure, was deemed to be a characteristic of SHINAYAKA hair. Furthermore, analysis of physical properties showed the difference between the elasticity of the outer layer and inner layer, and that this difference was bigger in SHINAYAKA hair compared to other hair. This phenomenon was observed not only in Japanese hair, but also in Caucasian hair. In addition, we have developed a new technology for creating “SHINAYAKA” hair by treatment with succinic acid. Inflexible and inelastic hair can be changed by this treatment, and its flexibility and elasticity improve by selective reduction of stiffness of the outer layer.

Notes on Early Land Plants Today. 48. Drepanolejeunea longifolia, a new synonym of Drepanolejeunea angustifolia (Marchantiophyta, Lejeuneaceae)

Phytotaxa ◽  
2014 ◽  
Vol 162 (4) ◽  
pp. 234 ◽  
Author(s):  
QIONG HE ◽  
RUI-LIANG ZHU
Keyword(s):  
Asexual Reproduction ◽  
Transverse Section ◽  
Land Plants ◽  
Cortical Cells ◽  
Basal Disc ◽  
New Synonym ◽  
Early Land ◽  
Medullary Cells

Drepanolejeunea (Spruce 1884: 186) Stephani (1891: 209), with about 110 currently accepted species, is the fourth largest genus of Lejeuneaceae (following Cololejeunea (Spruce 1884: 291) Stephani (1891: 208), Lejeunea Libert (1820: 373), and Cheilolejeunea (Spruce 1884: 251) Stephani (1890: 284) (He et al. 2012). Although Drepanolejeunea is a diverse pantropical genus, it is characterized and easily distinguished from other related genera by the 1) erect to widely divergent lobes of underleaves without a basal disc,  2) transverse section of stem with 7 cortical cells and 3 medullary cells, 3) presence of ocelli at least at base of leaf lobe), 4) proximal hyaline papilla, 5) pycnolejeuneoid leaf sequence of gynoecial innovation (if present), 6) inflated perianths usually with various projections near apex, and 7) asexual reproduction by means of cladia or caducous leaves (Zhu & So 2001; He et al. 2012; Pócs et al., 2013). The genus has been classified in a separate subtribe, Drepanolejeuneinae Gradstein (2013: 14), together with Vitalianthus Schuster & Giancotti (1993: 447).

scholarly journals Morphological Variations of the Cemento-Enamel Junction in Permanent Dentition / Morfološke varijacije cementno gleđnog spoja kod zuba stalne denticije

2015 ◽  
Vol 32 (3) ◽  
pp. 209-214 ◽  
Author(s):  
Nenad Stošić ◽  
Stefan Dačić ◽  
Dragica Dačić Simonović
Keyword(s):  
Room Temperature ◽  
Contact Point ◽  
Morphological Diversity ◽  
Permanent Teeth ◽  
Tooth Crown ◽  
Running Water ◽  
Morphological Variations ◽  
Different Types ◽  
Root Dentin ◽  
The Relationship

Abstract Cemento-enamel junction (CEJ) is an important anatomical structure of the tooth, which is located in the cervical part of the tooth between the crown and root, or at the contact point between the enamel which overlaps the tooth crown and cementum overlapping the root dentin. There are four possible relationships between two tissues that make the CEJ such as: the cement overlaps the enamel; the enamel overlaps the cement; the enamel and cement abut each other with no overlap; the enamel and cement are not in contact. The aim of this study was to determine the relationship between the enamel and cement which make the CEJ in different types of permanent teeth. The material consisted of 30 permanent teeth with intact CEJ. Staining of CEJ was carried out using the methylene blue. After staining, the tooth was washed under the running water and drying at room temperature. Each tooth was longitudinally cut in the vestibular-oral direction. Observation of CEJ was done with Leica light microscope and images were obtained using a Nikon camera. The results indicated that the most common form of CEJ between the cement and enamel in the region of CEJ was that cement and enamel abutted without overlap (36.7%), followed by the cement overlapping the enamel (33.3%), and the cases when a gap between the cement and enamel (16.7%) was present, and when the enamel overlaped the cement (13.3%). Because of the morphological diversity of CEJ, careful performing of dental interventions in the region of tooth neck is necessary because they may change the morphology of this region, induce the pathological processes and hypersensitivity of teeth.

scholarly journals The Relationship between Application of GERMAS (Community Movement) Hand Washing with Water and Soap Simultaneously with Diarrhea in Primary School Students

2019 ◽  
Vol 26 (3) ◽  
pp. 28-33
Author(s):  
Deno Harmanto ◽  
Nengke Puspita Sari
Keyword(s):  
Sampling Technique ◽  
Primary Data ◽  
School Students ◽  
Chi Square ◽  
Cross Sectional ◽  
Running Water ◽  
Endemic Diseases ◽  
Cross Sectional Design ◽  
The Relationship ◽  
Community Movement

Diarrhea disease in Indonesia is still one of the endemic diseases and still often causes extraordinary events (outbreaks) in the community. This study aimed to study the relationship between the application of Germas (Community Movement) hands washing with running water and soap simultaneously with the occurrence of diarrhea in SDN 108 students in Seluma Regency. The type of research used was Analytical Survey using Cross Sectional design.. Samples  of  this study were 167 students in grades 4, 5, and 6 of  SDN 108 Seluma Regency. Sampling in this study used a Total Sampling technique. Data collection techniques in this study using primary data by interview using a questionnaire. The statistical test used is Chi-Square. The results showed that of 167 students, there were 113 students (67.7%) who did not experience diarrhea, 123 students (73.7%) had poor hands washing with and running water and soap, and there was a relationship between hands washing use soap and running water and soap with diarrhea. Keywords: diarrhea, germas,hands washing, soap

scholarly journals Cell Proliferation and Cortical Cell Production in Relation to Wool Growth

1979 ◽  
Vol 32 (3) ◽  
pp. 317 ◽  
Author(s):  
Patricia A Wilson ◽  
BF Short
Keyword(s):  
Cell Proliferation ◽  
Nutrient Intake ◽  
Cortical Cell ◽  
Cortical Cells ◽  
Wool Growth ◽  
Wide Range ◽  
High Level ◽  
Relationship Of ◽  
The Relationship ◽  
Germinal Cells

The relationship of wool growth to cell proliferation in the follicle bulb and to the subsequent migration and growth of the fibre cortical cells was investigated in 10 Peppin Merino sheep. These sheep had been maintained on a low, medium or high level of nutrient intake to ensure a wide range in wool growth. The number and mitotic activity of the germinal cells in the follicle bulb were determined after administration of colchicine. Cortical cell size was measured following isolation of the fibre cells by acid-treatment of wool.

Examining the relationship between morphological variation and modeled broadband scattering responses of reef-associated fishes from the Southeast United States

2020 ◽  
Vol 228 ◽  
pp. 105590
Author(s):  
Kevin M. Boswell ◽  
Geir Pedersen ◽  
J. Christopher Taylor ◽  
Savannah LaBua ◽  
William F. Patterson
Keyword(s):  
United States ◽  
Morphological Variation ◽  
Southeast United States ◽  
The Relationship

Modèles empiriques de la production annuelle et du rapport P/B d'invertébrés benthiques d'eau courante

1992 ◽  
Vol 49 (3) ◽  
pp. 532-539 ◽  
Author(s):  
Antoine Morin ◽  
Nathalie Bourassa
Keyword(s):  
Water Temperature ◽  
Marine Invertebrates ◽  
Dry Mass ◽  
Log P ◽  
Published Data ◽  
Running Waters ◽  
Running Water ◽  
Taxonomic Groups ◽  
The Relationship ◽  
Individual Mass

Published data on secondary production of running water invertebrates are analyzed by multiple regression to quantify the relationship between productivity (P, in grams dry mass per square metre per year) and biomass (B, in grams dry mass per square metre), mean individual mass (M, in grams dry mass), and annual mean water temperature (T, in degrees Celsius) to compare productivity of major taxonomic groups and to compare to invertebrate populations from other aquatic ecosystems. The equation P = 0.18 B1.01M−0.34 100.037T explains 87% of the variability in log P in the 291 lotic invertebrate populations analyzed. Significant differences were detected among major taxonomic groups, but these differences account for only about 4% of the variability in log P. Once the effect of biomass, mean individual mass and water temperature are taken into account, productivity of lake and stream invertebrate populations is quite similar, although productivity is a linear function of biomass in streams and not in lakes. Comparison of models for running waters, lake and marine ecosystems suggests that marine invertebrates are less productive than freshwater populations.

Effect of cycloheximide on the freezing tolerance and ultrastructure of cortical parenchyma cells from mulberry twigs

1983 ◽  
Vol 61 (8) ◽  
pp. 2205-2211 ◽  
Author(s):  
T. Niki ◽  
A. Sakai
Keyword(s):  
Freezing Tolerance ◽  
Ultrastructural Changes ◽  
Cortical Cells ◽  
Cytological Change ◽  
Cortical Parenchyma ◽  
Parenchyma Cells ◽  
Cytological Changes ◽  
The Relationship ◽  
Further Development ◽  
In Cells

Experiments were performed using cycloheximide (CHI) on cortical parenchyma cells from mulberry twigs (Morus bombyciz cv. Gorogi) to understand the relationship between the sequence of cytological changes suggesting replacement of the plasmamembrane and the rapid increase in freezing tolerance. Cortical cells from twigs collected on October 16 and 27, which were hardy to −10 and −15 °C, respectively, were still alive after cooling to −70 °C if they had been exposed to −3 °C for 10 to 12 days. In these hardened cells, appearance of microvesicles (MVs) in the peripheral cytoplasm and fusion of these MVs with plasmamembrane were characteristically observed. Neither cytological change nor increase of freezing tolerance was observed in cells treated by CHI before their exposure to −3 °C for 10 to 12 days. However, the suppression of such changes by CHI treatment was effective only in cells which were hardy at −10 to −15 °C and not in the cells of twigs collected on November 4, which were hardy to −20 °C. Consequently, synthesis of some functional proteins during hardening was required for the further development of freezing tolerance, and synthesis had been accomplished before the cells became hardy to −20 °C. Ultrastructural changes brought about by CHI treatment suggest that synthesis of some functional proteins related to the presumed changes of plasmamembrane occurs during hardening.

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