scholarly journals NOTES ON GENERIC CHARACTERS IN THE LYCOSIDÆ

1904 ◽  
Vol 36 (6) ◽  
pp. 173-177 ◽  
Author(s):  
Ralph. V. Chamberlin
Keyword(s):  
Apical Part ◽  
Usual Position

In Lycosa there is in most cases present a small, apically more or less rounded flap or lobe at and pressing against the base of origin of the embolus. This lobe, which may be spoken of as the palea, is often small or but weakly developed; but in L. pulchara it is very long and conspicuous. Here it embraces and supports the embolus along much of its length, being at the same time shifted ectad from its usual position. This special development of the supporting palea in L. pulchra is associated with the pecuilar position of the embolus, which instead of curving back to rest along the lectus in the ususal manner, here arches foward and outward (i. e., ventrad) free from the bulb, only its apical part, which turns forward and rests obliquely across the auricula, being at all in contact with the lectus.

Characterization of the glycoconjugates of boar testis and epididymis

Reproduction ◽  
2000 ◽  
pp. 325-335 ◽  
Author(s):  
A Calvo ◽  
LM Pastor ◽  
S Bonet ◽  
E Pinart ◽  
M Ventura
Keyword(s):  
Ricinus Communis ◽  
Lectin Histochemistry ◽  
Apical Part ◽  
Seminiferous Tubules ◽  
In Situ Characterization ◽  
Intense Staining ◽  
Terminal Galactose ◽  
Boar Spermatozoa

Lectin histochemistry was used to perform in situ characterization of the glycoconjugates present in boar testis and epididymis. Thirteen horseradish peroxidase- or digoxigenin-labelled lectins were used in samples obtained from healthy fertile boars. The acrosomes of the spermatids were stained intensely by lectins with affinity for galactose and N-acetyl-galactosamine residues, these being soybean, peanut and Ricinus communis agglutinins. Sertoli cells were stained selectively by Maackia ammurensis agglutinin. The lamina propria of seminiferous tubules showed the most intense staining with fucose-binding lectins. The Golgi area and the apical part of the principal cells of the epididymis were stained intensely with many lectins and their distribution was similar in the three zones of the epididymis. On the basis of lectin affinity, both testis and epididymis appear to have N- and O-linked glycoconjugates. Spermatozoa from different epididymal regions showed different expression of terminal galactose and N-acetyl-galactosamine. Sialic acid (specifically alpha2,3 neuraminic-5 acid) was probably incorporated into spermatozoa along the extratesticular ducts. These findings indicate that the development and maturation of boar spermatozoa are accompanied by changes in glycoconjugates. As some lectins stain cellular or extracellular compartments specifically, these lectins could be useful markers in histopathological evaluation of diseases of boar testis and epididymis.

scholarly journals Fissure Ridges: A Reappraisal of Faulting and Travertine Deposition (Travitonics)

Geosciences ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 278
Author(s):  
Andrea Brogi ◽  
Enrico Capezzuoli ◽  
Volkan Karabacak ◽  
Mehmet Cihat Alcicek ◽  
Lianchao Luo
Keyword(s):  
State Of The Art ◽  
Tectonic Setting ◽  
Original Data ◽  
Apical Part ◽  
Thermal Waters ◽  
Growth Mechanisms ◽  
Depositional Facies ◽  
Geothermal Fluids ◽  
Tectonic Features ◽  
Travertine Deposition

The mechanical discontinuities in the upper crust (i.e., faults and related fractures) lead to the uprising of geothermal fluids to the Earth’s surface. If fluids are enriched in Ca2+ and HCO3-, masses of CaCO3 (i.e., travertine deposits) can form mainly due to the CO2 leakage from the thermal waters. Among other things, fissure-ridge-type deposits are peculiar travertine bodies made of bedded carbonate that gently to steeply dip away from the apical part where a central fissure is located, corresponding to the fracture trace intersecting the substratum; these morpho-tectonic features are the most useful deposits for tectonic and paleoseismological investigation, as their development is contemporaneous with the activity of faults leading to the enhancement of permeability that serves to guarantee the circulation of fluids and their emergence. Therefore, the fissure ridge architecture sheds light on the interplay among fault activity, travertine deposition, and ridge evolution, providing key geo-chronologic constraints due to the fact that travertine can be dated by different radiometric methods. In recent years, studies dealing with travertine fissure ridges have been considerably improved to provide a large amount of information. In this paper, we report the state of the art of knowledge on this topic refining the literature data as well as adding original data, mainly focusing on the fissure ridge morphology, internal architecture, depositional facies, growth mechanisms, tectonic setting in which the fissure ridges develop, and advantages of using the fissure ridges for neotectonic and seismotectonic studies.

scholarly journals Tungsten Ores of the Dzhida W-Mo Ore Field (Southwestern Transbaikalia, Russia): Mineral Composition and Physical-Chemical Conditions of Formation

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 725
Author(s):  
Ludmila B. Damdinova ◽  
Bulat B. Damdinov
Keyword(s):  
Mineral Composition ◽  
Fluid Inclusions ◽  
Apical Part ◽  
Hydrothermal Fluids ◽  
True Temperature ◽  
Gangue Mineral ◽  
Mineral Formation ◽  
Physical Chemical ◽  
Homogenization Temperatures ◽  
Chemical Conditions

This article discusses the peculiarities of mineral composition and a fluid inclusions (FIs further in the text) study of the Kholtoson W and Inkur W deposits located within the Dzhida W-Mo ore field (Southwestern Transbaikalia, Russia). The Mo mineralization spatially coincides with the apical part of the Pervomaisky stock (Pervomaisky deposit), and the W mineralization forms numerous quartz veins in the western part of the ore field (Kholtoson vein deposit) and the stockwork in the central part (Inkur stockwork deposit). The ore mineral composition is similar at both deposits. Quartz is the main gangue mineral; there are also present muscovite, K-feldspar, and carbonates. The main ore mineral of both deposits is hubnerite. In addition to hubnerite, at both deposits, more than 20 mineral species were identified; they include sulfides (pyrite, chalcopyrite, galena, sphalerite, bornite, etc.), sulfosalts (tetrahedrite, aikinite, stannite, etc.), oxides (scheelite, cassiterite), and tellurides (hessite). The results of mineralogical and fluid inclusions studies allowed us to conclude that the Inkur W and the Kholtoson W deposits were formed by the same hydrothermal fluids, related to the same ore-forming system. For both deposits, the fluid inclusion homogenization temperatures varied within the range ~195–344 °C. The presence of cogenetic liquid- and vapor-dominated inclusions in the quartz from the ores of the Kholtoson deposit allowed us to estimate the true temperature range of mineral formation as 413–350 °C. Ore deposition occurred under similar physical-chemical conditions, differing only in pressures of mineral formation. The main factors of hubnerite deposition from hydrothermal fluids were decreases in temperature.

scholarly journals AUTOTRANSPLANTASI GIGI-GIGI IMPAKSI INSISIVUS MAKSILA KANAN DISERTAI KISTA DENTIGEROUS DENGAN PENAMBAHAN GRAFT KOLAGEN KARBONAT APATIT

2018 ◽  
Vol 5 (1) ◽  
pp. 9
Author(s):  
Indah Wulansari ◽  
Maria Goreti Widiastuti ◽  
Prihartiningsih Prihartiningsih
Keyword(s):  
Alveolar Bone ◽  
Dentigerous Cyst ◽  
Apical Part ◽  
Maxillary Incisor ◽  
Carbonate Apatite ◽  
Horizontal Position ◽  
Surgery Patient ◽  
Dentigerous Cysts ◽  
Collagen Graft

Background: Autotransplantation is a surgical movement to reposition teeththat have been erupted, partially erupted or not yet erupted from one place to another in the same individual, either on post-extraction sockets or artifcial sockets made by surgery. Dental folicle from impacted teeth may develope dentigerous cysts that will result in destruction of the jaw bone. There are many factors that influence the success of autotransplantation, one of which is adequate bone support.The purpose of this poster is to present the successful autotransplantation treatment of impacted right maxillary incisor teeth associated with dentigerous cyst and bone support replacement after cyst enucleation using a carbonate apatite collagen graft, GAMACHA®, at RSUP Dr. Sardjito.Case management: A 9-year-old girl, referred to the Oral and MaxillofacialSurgery Department of RSUP Dr. Sardjito with the complaint of right deciduous maxillary incisor persistence. Radiological examination showing persistent of 51 and 52 radices and impaction of teeth 11 and 12 in a horizontal position above radix 53. Also visible radiolucent image with a frm limit around the crown of 11 that supports the image of cyst. This patient performed cyst enucleation under general anesthesia, removal of impacted 11 and 21, followed by an artifcial socket drilling at the alveolar bone that could support all aspects of the root wall although only on the apical part of the tooth root for teeth 11 and 12 placement. Autotransplantation of teeth11 and 12 followed by the application of GAMACHA® and wire fxation, strengthen with acrylic splint.Conclusion: Two years follow up after surgery, patient have no complaintseither from aesthetic or functional and the result of clinical and radiologicalexamination did not found existence of any pathological abnormalities around teeth 11 and 12.

scholarly journals Rape embryogenesis. IV. Appearance and disappearance of starch during embryo development

2014 ◽  
Vol 51 (3-4) ◽  
pp. 381-387 ◽  
Author(s):  
Teresa Tykarska
Keyword(s):  
Apical Part ◽  
Embryo Axis ◽  
Starch Grains ◽  
Cell Divisions ◽  
Embryo Cells ◽  
Dividing Cells ◽  
Gradual Accumulation ◽  
Black Seeds ◽  
Mother Cells ◽  
Storage Starch

Starch appears first in the suspensor of the proembryo with two-cell apical part. It is observed in the embryo proper from the octant stage. At first it is visible in all the embryo cells in the form of minute transient grains which disappear during cell divisions. But the columella mother cells and their derivatives have persistent large grains. When the embryo turns green in the heart stage a gradual accumulation of storage starch begins and lasts to the end of embryogenesis. Storage starch grains appear first in the auter cortex layers of the hypocotyl where the largest grains are to be found later, and afterwards in all the other tissues. Starch is usually absent in the frequently dividing cells, but even there it appears in the form of minute grains after the end of cell divisions. Disappearance of starch starts when the intensive green colour of the seed coat begins to fade. The first to disappear are the smallest granules in the regions where they were noted latest. In the embryo axis the starch grains remain deposited longest in dermatogen and cortex cells in the lower hypocotyl part. They are visible there, still when the seed turns brown. In black seeds starch may be only found in the columella the cells of which throughout embryogenesis contain amyloplasts filled with starch. These grains disappear completely at the time when the seeds become dry.

scholarly journals Anatomical investigations of the strawberry (Fragaria grandiflora Ehrh.) receptacle in the initial stages of development

2013 ◽  
Vol 34 (2) ◽  
pp. 195-207
Author(s):  
Jan Szymański
Keyword(s):  
Vascular Bundle ◽  
Apical Part ◽  
Strawberry Fruit ◽  
Cortical Cells ◽  
Anatomical Changes ◽  
Long Day ◽  
The Mean ◽  
Paraffin Method ◽  
Number Of Cells ◽  
Intensive Growth

The anatomical changes occurring in the strawberry fruit in the course of its growth were investigated. Flowers or fruits were collected from the apexes of the inflorescence of plants of the cultivar 'Talisman' cultivated in the glasshouse under long day. A method was developed for embedding the receptacle in a mixture of paraffin, rubber and wax, because the classical paraffin method did not give good results. Three different vascular bundle systems were distinguished in the strawberry, supplying the particular parts of the flower. Most intensive growth of the mean number of cells occurs in the cortex. The number of pith cells, beginning with the 5th day after pollination does not practically increase. Neither does between the 5th and 10th day after pollination, the number of cortical cells increase in the apical part of the fruit.

scholarly journals Echocardiographic global longitudinal strain is associated with infarct size assessed by cardiac magnetic resonance in acute myocardial infarction

2019 ◽  
Vol 6 (4) ◽  
pp. 81-89
Author(s):  
Gowsini Joseph ◽  
Tomas Zaremba ◽  
Martin Berg Johansen ◽  
Sarah Ekeloef ◽  
Einar Heiberg ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Cardiac Magnetic Resonance ◽  
Longitudinal Strain ◽  
Early Stage ◽  
Global Longitudinal Strain ◽  
Apical Part ◽  
Left Ventricular ◽  
Percent Increase ◽  
Study Population

The aim of this study was to investigate if there was an association between infarct size (IS) measured by cardiac magnetic resonance (CMR) and echocardiographic global longitudinal strain (GLS) in the early stage of acute myocardial infarction in patients with preserved left ventricular ejection fraction (LVEF). Patients with ST-segment elevation myocardial infarction who underwent primary percutaneous coronary intervention were assessed with CMR and transthoracic echocardiogram within 1 week of hospital admission. Two-dimensional speckle tracking was performed using a semi-automatic algorithm (EchoPac, GE Healthcare). Longitudinal strain curves were generated in a 17-segment model covering the entire left ventricular myocardium. GLS was calculated automatically. LVEF was measured by auto-LVEF in EchoPac. IS was measured by late gadolinium enhancement CMR in short-axis views covering the left ventricle. The study population consisted of 49 patients (age 60.4 ± 9.7 years; 92% male). The study population had preserved echocardiographic LVEF with a mean of 45.8 ± 8.7%. For each percent increase of IS, we found an impairment in GLS by 1.59% (95% CI 0.57–2.61), P = 0.02, after adjustment for sex, age and LVEF. No significant association between IS and echocardiographic LVEF was found: −0.25 (95% CI: −0.61 to 0.11), P = 0.51. At the segmental level, the strongest association between IS and longitudinal strain was found in the apical part of the LV: impairment of 1.69% (95% CI: 1.14–2.23), P < 0.001, for each percent increase in IS. In conclusion, GLS was significantly associated with IS in the early stage of acute myocardial infarction in patients with preserved LVEF, and this association was strongest in the apical part of the LV. No association between IS and LVEF was found.

scholarly journals Micro-morphological features of achene of wild annual sunflowers

2016 ◽  
pp. 73-80 ◽  
Author(s):  
Jelena Lazarevic ◽  
Jadranka Lukovic ◽  
Sreten Terzic ◽  
Milan Jockovic ◽  
Lana Zoric ◽  
...  
Keyword(s):  
Plant Material ◽  
Morphological Diversity ◽  
Apical Part ◽  
Sem Analysis ◽  
Vegetable Crops ◽  
Trichome Density ◽  
Physiological Maturity ◽  
Novi Sad ◽  
Micro Morphology ◽  
Different Parts

The aim of this research is to characterize wild annual sunflowers on the basis of achene micro-morphology. Plant material was grown up on an experimental field of the Institute of Field and Vegetable Crops in Novi Sad during 2015. Achene samples were hand-collected at the time of physiological maturity. Morphological measurements of achenes were performed using stereoscopic microscope Leica MZ16 with Leica DFC 320 Camera. The micro-morphological diversity of achenes was assessed using scanning electron microscopy (SEM). Obtained results indicated the presence of some quantitative and qualitative differences in achene characteristics among analyzed species, such as in their size, color, carpopodium and stylopodium shape, and distribution of trichomes on the achene surface. The carpopodium of examined species was asymmetrical at the maturity. Differences in the cuticle and wax ornamentation in different parts of the achenes, on the anticlinal walls of epidermal cells, were identified. The SEM analysis revealed the presence of non-glandular, multicellular bi-seriate trichomes (twin hairs) on the achene surface. This trichome type consisted of two elongated, parallel cells of different length. Considering the distribution of trichomes among the apical, median and basal regions of the fruit, most of the species demonstrated greater trichome density in the apical part.

scholarly journals Expression of claudins in the normal canine gastric mucosa

2014 ◽  
Vol 62 (1) ◽  
pp. 13-21 ◽  
Author(s):  
Roland Psáder ◽  
Csaba Jakab ◽  
Ákos Máthé ◽  
Gyula Balka ◽  
Kinga Pápa ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Gastric Mucosa ◽  
Epithelial Cells ◽  
Apical Part ◽  
Basal Part ◽  
Gastric Epithelial Cells ◽  
Gastric Glands ◽  
Gastric Cells ◽  
Pyloric Stomach ◽  
Mucous Neck Cells

The aim of the present study was to investigate the expression pattern of claudin-1, -2, -3, -4, -5, -7, -8, -10 and -18 in the intact fundic and pyloric gastric mucosa of dogs. Intense, linear, membranous claudin-18 positivity was detected in the surface gastric cells and in the epithelial cells of the gastric glands both in the fundic and pyloric stomach regions. The mucous neck cells in the apical part of the glands, furthermore the parietal cells and chief cells of the basal part of the gland were all positive for claudin-18, in the same way as the enteroendocrine cells. Cells of the basal part of the pyloric glands showed intense, linear, membranous claudin-2 positivity, but cells of the superficial portion of these glands and the surface gastric cells in this region were claudin-2 negative. Fibroblasts, endothelial cells, lymphocytes of the propria layer, smooth muscle cells and vegetative neurons were all negative for claudin-2. All gastric epithelial cells were negative for claudin-1, -3, -4, -5, -6, -7, -8 and -10. The endothelial cells of the propria layer had intense claudin-5 positivity. We assume that claudin-18 forms a paracellular barrier against gastric acid in the healthy canine stomach, in the same way as in mice.

Two new species of the genus Sphingonotus Fieber, 1852 (Orthoptera: Oedipodidae) from China

Zootaxa ◽  
2016 ◽  
Vol 4205 (6) ◽  
pp. 593
Author(s):  
CHENG-QUAN CAO ◽  
JIAN-PING SHI ◽  
ZHAN YIN
Keyword(s):  
New Species ◽  
Agricultural Research ◽  
Plant Protection ◽  
Hind Wing ◽  
Hind Tibia ◽  
Apical Part ◽  
Outer Side ◽  
Type Specimens ◽  
Two New Species ◽  
Black Band

Two new species of the genus Sphingonotus Fieber, 1852, namely Sphingonotus taiwanensis sp. nov. and Sphingonotus zhongningensis sp. nov. are described in this paper from China. The new species Sphingonotus taiwanensis sp. nov. is similar to Sphingonotus nebulosus (Fiescher-Waldheim, 1846), but differs from the latter by interspace of mesosternum wider, width 1.8 times the length; hind femur pale red on inner side; hind tibia pale red, with 13 spines on inner side and 10 spines on outer side; hind wing pale yellow at base. The new species Sphingonotus zhongningensis sp. nov. is similar to Sphingonotus salinus (Pallas, 1773), but differs from the latter in: vertical diameter of eye 1.3 times horizontal diameter; metazona of pronotum is 2.0 times prozona in length; hind tibiae with 13 spines on inner side and 12 spines on outer side; black band of hind wing wider in the middle, apical part not narrowed; black band of hind wing in the apical part larger, not divided into two.        The type specimens are deposited in the Taiwan Agricultural Research of Institute (TARI), Taichung Taiwan, China and in the College of Plant Protection, China Agricultural University, Beijing, China respectively. 

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