scholarly journals Development, structure and senescence of colleters in Gardenia lucida Roxb. (Rubiaceae)

2014 ◽  
Vol 57 (1) ◽  
pp. 3-7 ◽  
Author(s):  
Yash Dave ◽  
P. M. Kuriachen ◽  
Thomas Vinoth
Keyword(s):  
Calcium Oxalate ◽  
Basal Part ◽  
Central Core ◽  
Resinous Substance ◽  
Development Structure

Colleters are found on the adaxial basal part of the stipule and calyx of <em>Gardenia lucida</em>. They secrete a yellow transparent resinous substance commonly known as "Dikamali gum". They develop on both the stipule and calyx from a group of epidermal and hypodermal initials. A mature colleter consists of a central core of elongated parenchymatous cells surrounded by a palisade-like secretory epidermis. Druses type crystals of calcium oxalate are frequent in the colleters. At the time of senescence the central cells show lignification and the presence of tannin.

scholarly journals Rare non-papillary lithiasis of calcium oxalate monohydrate generated on a central core of potassium urate

2021 ◽  
Vol 34 ◽  
pp. 101483
Author(s):  
Felix Grases ◽  
Antonia Costa-Bauza ◽  
Ana Garcia-Raja ◽  
Dolores Rodrigo
Keyword(s):  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
Central Core

Identification of calcium oxalate crystals in dried or fixed tobacco leaf

1984 ◽  
Vol 42 ◽  
pp. 288-289
Author(s):  
Vicki L. Baliga ◽  
Mary Ellen Counts
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Oxalate ◽  
Growth And Development ◽  
Polarized Light ◽  
Calcium Oxalate Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Calcium is an important element in the growth and development of plants and one form of calcium is calcium oxalate. Calcium oxalate has been found in leaf seed, stem material plant tissue culture, fungi and lichen using one or more of the following methods—polarized light microscopy (PLM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction.Two methods are presented here for qualitatively estimating calcium oxalate in dried or fixed tobacco (Nicotiana) leaf from different stalk positions using PLM. SEM, coupled with energy dispersive x-ray spectrometry (EDS), and powder x-ray diffraction were used to verify that the crystals observed in the dried leaf with PLM were calcium oxalate.

Ulcerogenic Tumors of the Pancreas

1968 ◽  
Vol 26 ◽  
pp. 186-187
Author(s):  
J. C. Garancis ◽  
J. F. Kuzma ◽  
S. D. Wilson ◽  
E. H. Ellison
Keyword(s):  
Endoplasmic Reticulum ◽  
Tumor Cells ◽  
Islet Cell ◽  
Disease Process ◽  
Central Core ◽  
Islet Cell Tumors ◽  
Opaque Zone ◽  
Granular Form ◽  
Zollinger Ellison Syndrome

It has been proposed that a gastrin-like hormone elaborated by non-beta islet tumors of the pancreas may be responsible for a fulminating ulcer diathesis. Subsequently, a potent gastric secretagogue was isolated from ulcerogenic tumors of the pancreas. This disease process is known now as “Zollinger-Ellison syndrome”.In our studies of two cases of Zollinger-Ellison syndrome, pancreatic lesions were identified as alpha islet cell tumors (Fig. 1). Tumor cells were fairly uniform. The sizes of the alpha granules were not significantly different, but their number and distribution varied greatly from one cell to another. Each granule consisted of a round, highly dense central core, separated from the limiting membrane by an opaque zone. The granular form of the endoplasmic reticulum was particularly prominent. Numerous mitochondria, round or elongated, were dispersed throughout the cytoplasm. Individual or clusters of lysosomes were observed in the majority of cells.

An SEM study of raphide crystal initials in the leaves of vitis (grape)

1995 ◽  
Vol 53 ◽  
pp. 984-985
Author(s):  
H. J. Arnott ◽  
M. A. Webb ◽  
L. E. Lopez
Keyword(s):  
Calcium Oxalate ◽  
Water Soluble ◽  
Calcium Oxalate Crystals ◽  
Calcium Oxalate Crystal ◽  
Oxalate Crystals ◽  
Large Numbers ◽  
Sem Study ◽  
The Matrix ◽  
Crystal Cells ◽  
Crystal Idioblast

Many papers have been published on the structure of calcium oxalate crystals in plants, however, few deal with the early development of crystals. Large numbers of idioblastic calcium oxalate crystal cells are found in the leaves of Vitis mustangensis, V. labrusca and V. vulpina. A crystal idioblast, or raphide cell, will produce 150-300 needle-like calcium oxalate crystals within a central vacuole. Each raphide crystal is autonomous, having been produced in a separate membrane-defined crystal chamber; the idioblast''s crystal complement is collectively embedded in a water soluble glycoprotein matrix which fills the vacuole. The crystals are twins, each having a pointed and a bidentate end (Fig 1); when mature they are about 0.5-1.2 μn in diameter and 30-70 μm in length. Crystal bundles, i.e., crystals and their matrix, can be isolated from leaves using 100% ETOH. If the bundles are treated with H2O the matrix surrounding the crystals rapidly disperses.

The Taxonomic Structuring of Medical Information and its Usefulness in this Form

1965 ◽  
Vol 04 (03) ◽  
pp. 112-114 ◽  
Author(s):  
H. Zinsser
Keyword(s):  
Subject Matter ◽  
Medical Information ◽  
Central Core ◽  
Diagnostic Strategy ◽  
Programmed Instruction ◽  
Orderly Fashion ◽  
The Subject

An outline has been presented in historical fashion of the steps devised to organize the central core of medical information allowing the subject matter, the patient, to define the nature and the progression of the diseases from which he suffers, with and without therapy; and approaches have been made to organize this information in such fashion as to align the definitions in orderly fashion to teach both diagnostic strategy and the content of the diseases by programmed instruction.

“In vitro” Neutralization with Oxalate Ion of the Anticoagulant Effect of Heparin

1961 ◽  
Vol 05 (02) ◽  
pp. 314-318 ◽  
Author(s):  
W. O Cruz ◽  
L Meis ◽  
C. P Dietrich
Keyword(s):  
Calcium Oxalate ◽  
Aluminium Hydroxide ◽  
Barium Sulfate ◽  
Anticoagulant Effect ◽  
Normal Plasma ◽  
Oxalate Ion

SummaryHeparinized blood or plasma coagulates if, after addition of oxalate, recalcification follows. Of the decalcifying agents only oxalate ion has been suitable for demonstrating this phenomenon. Oxalate seem to accomplish two different roles connected with this effect: a fundamental one, i. e., to sensitize a heparinlipoprotein complex to the action of an anti-heparin factor found in normal plasma or serum and a secondary one, related to its capacity to adsorb this antiheparin factor. The latter is removable by centrifugation. This anti-heparin oxalate factor, which is able to counteract the action of heparin after previous addition of oxalate, was found in sequestrened, Dowex 50 resin plasma or in serum, but is not active in citrated plasma. This factor was removed from plasma by adsorption with barium sulfate, aluminium hydroxide or calcium oxalate and was eluted from these adsorbants after incubation with saline.

Pharmacognostic studies of Morinda brevipes S. Y. Hu

2019 ◽  
Vol 48 (3) ◽  
pp. 401-407
Author(s):  
Rong Li ◽  
Xiaojing Lin ◽  
Genqiu Tang ◽  
Junni Li ◽  
Dong Wang ◽  
...  
Keyword(s):  
Calcium Oxalate ◽  
Transverse Section ◽  
Volatile Oils ◽  
Needle Crystal ◽  
Cork Cell ◽  
Registration Number ◽  
Phytochemical Studies ◽  
First Time ◽  
Layer Chromatography ◽  
Inequality Type

DNA barcoding of ITS and psbA-trnH regions, histochemistry as well as thin layer chromatography (TLC) of Morinda brevipes S.Y. Hu were analyzed. Transverse section of root revealed the presence of cortex, xylem, cork cell, stone cells, and calcium oxalate sandy crystal. The lower epidermis cells showed many stoma in paracytic or inequality type. Spiral vessel and tiny calcium oxalate needle crystal usually appeared in the powder. TLC showed the presence of emodin in M. brevipes. Phytochemical studies revealed the existence of carbohydrates, saponins, tannins, flavones, anthraquinones, alkaloids and volatile oils. The ITS and psbAtrnH sequences were found for the first time which were submitted to NCBI to obtain the GenBank registration number. This study might play an important role in the identification, and utilization of M. brevipes for various purposes.

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