Royal Society: On Hendry's Crystals

1864 ◽  
Vol s2-4 (15) ◽  
pp. 241-246
Author(s):  
WILLIAM HENDRY
Keyword(s):  
Royal Society ◽  
Chemical Nature ◽  
Glass Slide ◽  
Thin Glass ◽  
Similar Treatment ◽  
Glass Cover

The author stated that four years since, in attempting to substitute fusion by the blowpipe for cement, in fixing their glass covers to slides, he noticed masses of crystals produced in the covers after the treatment, and believing them to be unkown, he named them after himself. To obtain the crytals he heats a thin glass cover on a piece of mica, over a spirit-lamp, holding both with forceps; then quickly turning them to the side of the flame, applies a blowpipe, withdrawing the cover to the apex of the flame for a few moments. An examination with a 1 or ½inch objective will then show the crystals. Similar results were ottseryed in a thin glass slide, after a similar treatment, when examined with a 1/12th objective. Specimens were sent with the paper, and the author suggests that it would be desirable to ascertain the chemical nature of the crystals, whether a silicate of lead or soda.

scholarly journals I. On the structure of striped muscular fibre

1873 ◽  
Vol 21 (139-147) ◽  
pp. 242-245 ◽  
Keyword(s):  
Glass Slide ◽  
Muscular Fibre ◽  
Thin Glass ◽  
Water Beetle ◽  
The Subject ◽  
The Common ◽  
Large Water

After premising that, owing to the rapidity with which changes set in after death, the subject in question can only properly be worked out whilst the muscular fibres are still living, the author proceeds to give the result of his investigations of the tissue in this condition. The animal employed was the common large water-beetle, the muscles of the legs being taken. These were examined entirely without addition, being either teazed out upon a glass slide in the ordinary way and covered with thin glass, or else prepared upon the latter, which was then inverted over a ring of putty after the method introduced by Strieker.

scholarly journals X. An investigation on the chemical nature of wax

1848 ◽  
Vol 138 ◽  
pp. 147-158
Keyword(s):  
Royal Society ◽  
Chemical Nature ◽  
The Body ◽  
Remarkable Change ◽  
Vegetable Products ◽  
History Of ◽  
Chemical History ◽  
Von Liebig ◽  
The Way

In the summer of 1845, while studying at Giessen, in the laboratory of Professor von Liebig, I undertook, at the request of that distinguished chemist, the analysis of certain waxes which were the results of an experiment made by Herr Gundlach of Cassel, of feeding bees upon different kinds of sugar. It is not my intention to give those analyses here, and I mention them now only for the purpose of stating that it was this circumstance which first turned my attention to the inquiry of which I now offer the results to the Royal Society, and that it was in Professor von Liebig’s laboratory that this investigation was begun. Various chemists have before me undertaken a similar inquiry. The chemical history of a substance so abundant in nature and so useful to man as wax was always a curious question. Of late it has acquired a peculiar interest from our knowledge, derived from repeated experiments, that wax is formed in the organs of the bee, and that in the body of that insect that remarkable change of sugar into wax takes place, the knowledge of the true conditions of which would, we may hope, throw light upon the formation of fatty bodies, and on the way by which out of vegetable products the continual repair of the animal structure is effected. The first step to such a knowledge must be the accurate study of the chemical nature of those substances which are thus produced.

scholarly journals Cytocompatibility of Graphene Monolayer and Its Impact on Focal Cell Adhesion, Mitochondrial Morphology and Activity in BALB/3T3 Fibroblasts

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 643
Author(s):  
Iwona Lasocka ◽  
Lidia Szulc-Dąbrowska ◽  
Michał Skibniewski ◽  
Ewa Skibniewska ◽  
Karolina Gregorczyk-Zboroch ◽  
...  
Keyword(s):  
Glass Slide ◽  
Mitochondrial Morphology ◽  
Graphene Monolayer ◽  
Fluorescence Intensity Ratio ◽  
Mitochondrial Network ◽  
Glass Cover ◽  
3T3 Fibroblasts ◽  
Focal Contacts ◽  
Cover Slide ◽  
Network Morphology

This study investigates the effect of graphene scaffold on morphology, viability, cytoskeleton, focal contacts, mitochondrial network morphology and activity in BALB/3T3 fibroblasts and provides new data on biocompatibility of the “graphene-family nanomaterials”. We used graphene monolayer applied onto glass cover slide by electrochemical delamination method and regular glass cover slide, as a reference. The morphology of fibroblasts growing on graphene was unaltered, and the cell viability was 95% compared to control cells on non-coated glass slide. There was no significant difference in the cell size (spreading) between both groups studied. Graphene platform significantly increased BALB/3T3 cell mitochondrial activity (WST-8 test) compared to glass substrate. To demonstrate the variability in focal contacts pattern, the effect of graphene on vinculin was examined, which revealed a significant increase in focal contact size comparing to control-glass slide. There was no disruption in mitochondrial network morphology, which was branched and well connected in relation to the control group. Evaluation of the JC-1 red/green fluorescence intensity ratio revealed similar levels of mitochondrial membrane potential in cells growing on graphene-coated and uncoated slides. These results indicate that graphene monolayer scaffold is cytocompatible with connective tissue cells examined and could be beneficial for tissue engineering therapy.

II. On the temperature of the springs, wells and rivers of India and Egypt, and of the sea and table-lands within the tropics

1845 ◽  
Vol 135 ◽  
pp. 125-139
Keyword(s):  
High Temperature ◽  
Chemical Composition ◽  
Royal Society ◽  
Chemical Nature ◽  
Sufficient Data ◽  
History Of ◽  
The Mean ◽  
Casual Observer ◽  
The Tropics ◽  
Perennial Springs

Professor Jameson, in his chapter on the hydrography of India, justly remarks, “Although India, like other great tracts of country, contains many springs, these have hitherto attracted but little attention. The temperature of but few of them is known; their magnitudes and geognostical situations are scarcely ever mentioned; and their chemical composition, excepting in a very few instances, has been neglected. The most important feature in the natural history of common or perennial springs , namely their temperature, is rarely noticed, although a knowledge of this fact is illus­trative, not only of the mean temperature of the climate, but also of the elevations of the land above the level of the sea; and our information in regard to their chemical nature is equally meagre". Since the publication of these remarks, much has been done by Prinsep and others in these branches of Indian hydrography, but more remains to be effected before this reproach can be wiped out. The heat of springs having a temperature little above the mean of that of the surrounding country has been rarely noticed, though I feel convinced many such exist in India. That of springs of high temperature, more attractive to the casual observer, has been more remarked. My own observations, and the few inferences I have ventured to draw from some of them, are not offered as sufficient data for the establishment of laws, but merely as a contributory mite to knowledge; in the view of courting inquiry and observation by others more competent and better situated for continued research than myself. The thermometric observations have been snatched generally on the line of march, or during hasty travel: since my return to England, through the kindness of Mr. Roberton, they have been adjusted to the indications given by the standard thermometer of the Royal Society.

scholarly journals XXV. An account of experiments on the influence of colloids upon crystalline form, and on movements observed in mixtures of colloids with crystalloids

1879 ◽  
Vol 29 (196-199) ◽  
pp. 238-246 ◽  
Keyword(s):  
Royal Society ◽  
Crystalline Form ◽  
Alcoholic Extract ◽  
Microscope Slide ◽  
Thin Glass

In the “Proceedings of the Royal Society” for 1866, Dr. Montgomery has recorded some very remarkable observations made by him on the behaviour of “myelin” when brought into contact with water. “Myelin” being a term of various applications, it is necessary to state that the substance indicated in Dr. Montgomery’s statement is an alcoholic extract of yolk of egg. A small quantity being placed on a microscope-slide, and covered with thin glass, is brought under observation by a tolerably high object-glass.

XXVII. Some experiments on the combustion of the diamond and other carbonaceous substances

1814 ◽  
Vol 104 ◽  
pp. 557-570 ◽  
Keyword(s):  
Chemical Composition ◽  
Royal Society ◽  
Chemical Nature ◽  
Carbonaceous Matter ◽  
Refractive Power ◽  
Muriatic Acid ◽  
Guyton De Morveau ◽  
Sensible Qualities

Since it has been shewn by various accurate experiments, that the diamond and common carbonaceous substances con­sume nearly the same quantity of oxygene in combustion, and produce a gas having the same obvious qualities, a number of conjectures have been formed to explain the remarkable differences in the sensible qualities of these bodies, by suppos­ing some minute difference in their chemical composition; these conjectures have been often discussed, it will not be necessary therefore to dwell upon them: M. M. Biot and Arago, from the high refractive power of the diamond, have supposed that it may contain hydrogene; I ventured to sug­gest in my third Bakerian Lecture, from the circumstance of its non-conducting power, and from the action of potassium upon it, that a minute portion of oxygene may exist in it; and in my Account of some new experiments on the fluoric Compounds,I hazarded the idea that it might be the car­bonaceous principle combined with some new light and sub­tile element of the class of supporters of combustion. M. Guyton de Morveau, who conceived he had proved by ex­periments made fourteen years ago, that common carbona­ceous substances were, oxides of diamonds, from his last re­searches, conducted in the same manner as those of Messrs. Allen and Pepys, seems still inclined to adopt this opinion, though in admitting a much smaller quantity of oxygene than he originally supposed in charcoal; and he considers the dia­mond as pure carbonaceous matter, containing, possibly, some atoms of water of crystallisation. I have long had a desire of making some new experiments on the combustion of the diamond and other carbonaceous substances, and this desire was increased by the new facts ascertained with respect to iodine, which by uniting to hydrogene, affords an acid so analogous to muriatic acid, that it was for some time confounded with that substance. My object in these experiments, was to examine minutely whether any peculiar matter was separated from the diamond during its combustion, and to determine whether the gas, formed in this process, was precisely the same in its minute chemical nature, as that formed in the combustion of common charcoal. I have lately been able to accomplish my wishes; I shall now have the honour of communicating my results to the Royal Society.

scholarly journals The ferrier lecture on problems connected with the principle of humoral transmission of nervous impulses

1935 ◽  
Vol 118 (809) ◽  
pp. 299-316 ◽  
Keyword(s):  
Nervous System ◽  
Royal Society ◽  
Chemical Nature ◽  
Humoral Transmission

Mr. President, Ladies and Gentlemen,—I am deeply appreciative of the honour, which has been done me by the President and Council of the Royal Society, in inviting me to deliver here, in this ancient and famous institution, a lecture which commemorates the work of Sir David Ferrier; and my sense of the honour is enhanced by the thought that my predecessors, as lecturers on this Foundation, have been Sir Charles Sherrington and Professor Ariëns Kappers. Each of these lectures in memory of Sir David Ferrier is to deal with some subject related to the structure or function of the nervous system. Within recent years investigations in this field have dealt not only with the course of the specific nervous functions but, in an ever-increasing degree, with the analysis of nervous action into its fundamental factors, and especially those of a chemical nature. Having been mainly interested in these lines of development, and assuming that you have chosen the lecturer with a view to his own particular field of research, I have thought it proper that I should endeavour to deal with problems connected with the principle of the humoral transmission of nervous impulses.

Variations in Surface Textures of Quartz Sand using Electron Microscopy

1970 ◽  
Vol 28 ◽  
pp. 494-495
Author(s):  
Eugene J. Amaral
Keyword(s):  
Electron Microscopy ◽  
Glass Industry ◽  
Glass Slide ◽  
Distilled Water ◽  
Early Paleozoic ◽  
Secondary Effects ◽  
Surface Textures ◽  
High Silica ◽  
Sand Deposit ◽  
The U.S

Examination of sand grain surfaces from early Paleozoic sandstones by electron microscopy reveals a variety of secondary effects caused by rock-forming processes after final deposition of the sand. Detailed studies were conducted on both coarse (≥0.71mm) and fine (=0.25mm) fractions of St. Peter Sandstone, a widespread sand deposit underlying much of the U.S. Central Interior and used in the glass industry because of its remarkably high silica purity.The very friable sandstone was disaggregated and sieved to obtain the two size fractions, and then cleaned by boiling in HCl to remove any iron impurities and rinsed in distilled water. The sand grains were then partially embedded by sprinkling them onto a glass slide coated with a thin tacky layer of latex. Direct platinum shadowed carbon replicas were made of the exposed sand grain surfaces, and were separated by dissolution of the silica in HF acid.

Release of Neurosecretion in the Crayfish Sinus Gland

1968 ◽  
Vol 26 ◽  
pp. 150-151
Author(s):  
Richard R. Shivers
Keyword(s):  
Chemical Nature ◽  
Storage Site ◽  
Neurosecretory Granules ◽  
Sinus Gland ◽  
Diameter Class ◽  
Dense Membrane ◽  
Neurohemal Organ ◽  
Dense Vesicles

The sinus gland is a neurohemal organ located in the crayfish eyestalk and represents a storage site for neurohormones prior to their release into the circulation. The sinus gland contains 3 classes of dense, membrane-limited granules: 1) granules measuring less than 1000 Å in diameter, 2) granules measuring 1100-1400 Å in diameter, and 3) granules measuring 1500-2000 Å in diameter. Class 3 granules are the most electron-dense of the granules found in the sinus gland, while class 2 granules are the most abundant. Generally, all granules appear to undergo similar changes during release.Release of neurosecretory granules may be initiated by a preliminary fragmentation of the “parent granule” into smaller, less dense vesicles which measure about 350 Å in diameter (V, Figs. 1-3). A decrease in density of the granules prior to their fragmentation has been observed and may reflect a change in the chemical nature of the granule contents.

Freeze-fracture cytochemistry: A goal set by Russell Steere in 1957

1993 ◽  
Vol 51 ◽  
pp. 60-61
Author(s):  
Nicholas J Severs
Keyword(s):  
Chemical Nature ◽  
Biological Systems ◽  
Freeze Fracture ◽  
Structural Components ◽  
Major Goal ◽  
Membrane Biology ◽  
Routine Application ◽  
The Future ◽  
Freeze Etching

In his pioneering demonstration of the potential of freeze-etching in biological systems, Russell Steere assessed the future promise and limitations of the technique with remarkable foresight. Item 2 in his list of inherent difficulties as they then stood stated “The chemical nature of the objects seen in the replica cannot be determined”. This defined a major goal for practitioners of freeze-fracture which, for more than a decade, seemed unattainable. It was not until the introduction of the label-fracture-etch technique in the early 1970s that the mould was broken, and not until the following decade that the full scope of modern freeze-fracture cytochemistry took shape. The culmination of these developments in the 1990s now equips the researcher with a set of effective techniques for routine application in cell and membrane biology.Freeze-fracture cytochemical techniques are all designed to provide information on the chemical nature of structural components revealed by freeze-fracture, but differ in how this is achieved, in precisely what type of information is obtained, and in which types of specimen can be studied.

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