scholarly journals The search for a reliable mounting medium for Recent ‘live’ foraminifera

1991 ◽  
Vol 10 (1) ◽  
pp. 16-21 ◽  
Author(s):  
C. Maybury ◽  
L. Morrison ◽  
V. Stewart
Keyword(s):  
Refractive Index ◽  
Microscopical Examination ◽  
Long Term Storage ◽  
Insufficient Time ◽  
Term Storage ◽  
Light Microscopical Examination

Abstract. There is no suitable mounting medium for the long term storage of Recent ‘live’ foraminifera. Glycerol has been used for this purpose since the last century, but its properties do not meet our requirements (see below). We therefore began a series of trials in order to find the ‘perfect’ mountant. The inception of this “Micropalaeontological Notebook” provides a timely opportunity to highlight the results of our experiments and to elicit a response from the readership to facilitate our search.In choosing mounting media for experiment it was first necessary to detail our requirements. The latter are as follows: the medium must be clear and possess a refractive index (nD) close or equal to that of glass. The nD of the mounted specimens should differ from that of the mountant or they will be invisible. It should function as a permanent mount, fixing specimens in a position suitable for light microscopical examination. It should not form aggregations or induce overlap of specimens and should permit easy relocation of small organisms (i.e., fixing them so that their co-ordinates can be read with an England Finder). It should neither be messy nor aspirate air and should not contract, thereby crushing delicate specimens. The mountant must be treated to inhibit bacterial and fungal growths. It must be relatively inexpensive and quick to prepare and must not solidify too rapidly, leaving insufficient time to position specimens. Since the specimens are ‘live’ it is important that the protoplasmic contents of the cell auld the mountant are. . .

scholarly journals Influence of Varied Fluorine Contents on Long-Term Storage Stability of Polyacrylate Nanoparticles and Film Properties

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Hongzhu Liu ◽  
Gaofan Zhang ◽  
Lulu Lu ◽  
Yuexing Chen ◽  
Mengting Luo ◽  
...  
Keyword(s):  
Refractive Index ◽  
Polymer Material ◽  
Storage Stability ◽  
Fluorine Content ◽  
Latex Film ◽  
Film Properties ◽  
Fluorinated Polyacrylate ◽  
Long Term Storage ◽  
Term Storage

Polyacrylate nanoparticles are widely applied and typically prepared by many polymerization methods. However, poor long-term storage stability of nanoparticles limited their use, so some methods are carried out to overcome it. In this paper, we investigated a series of fluorinated polyacrylate nanoparticles to improve the long-term storage stability of polyacrylate nanoparticles. We found that increasing fluorine content resists the aggregation of nanoparticles during long-term storage. Furthermore, a higher content of fluorine can improve the hydrophobicity of latex polyacrylate film and increase the refractive index of latex polyacrylate film. The properties of the polyacrylate nanoparticles and latex film can thus be controlled by changing fluorine contents, which in turn provides key insights into the design of functional polymer material.

scholarly journals The search for a reliable mounting medium for Recent ‘live’ foraminifera

1991 ◽  
Vol 9 (2) ◽  
pp. 172-172 ◽  
Author(s):  
C. Maybury ◽  
L. Morrison ◽  
V. Stewart
Keyword(s):  
Refractive Index ◽  
Microscopical Examination ◽  
Insufficient Time ◽  
Light Microscopical Examination

Abstract. There is no suitable mounting medium for the longterm storage of Recent, ‘live’ foraminifera. Glycerol has been used for this purpose since the last century, but its properties do not meet our requirements (see below). We therefore began a series of trials in order to find the ‘perfect’ mountant. The inception of this ‘Micropalaeontological Notebook’ provides a timely opportunity to highlight the results of our experiments and to elicit a response from the readership to facilitate our search.In choosing mounting media for experiment it was first necessary to detail our requirements. The latter are as follows: the medium must be clear and possess a refractive index (nD:) close or equal to that of glass. The nD of the mounted specimens should differ from that of the mountant or they will be invisible. It should function as a permanent mount, fixing specimens in a position suitable for light microscopical examination. It should not form aggregations or induce overlap of specimens and should permit easy relocation of small organisms (i.e., fixing them so that their co-ordinates can be read with an England Finder) It should neither be messy nor aspirate air and should not contract, thereby crushing delicate specimens. The mountant must be treated to inhibit bacterial and fungal growths. It must be relatively inexpensive and quick to prepare and must not solidify too rapidly, leaving insufficient time to position specimens. Since the specimens are ‘live’ it is important that the protoplasmic contents of the cell and the mountant are isotonic. Similarly, . . .

Modelling of Moisture Movement in Wood during Outdoor Storage

2001 ◽  
Vol 6 (2) ◽  
pp. 3-14 ◽  
Author(s):  
R. Baronas ◽  
F. Ivanauskas ◽  
I. Juodeikienė ◽  
A. Kajalavičius
Keyword(s):  
Experimental Data ◽  
Finite Difference ◽  
Climatic Conditions ◽  
Two Dimensional ◽  
Moisture Movement ◽  
Finite Difference Technique ◽  
Long Term Storage ◽  
Space Formulation ◽  
Term Storage

A model of moisture movement in wood is presented in this paper in a two-dimensional-in-space formulation. The finite-difference technique has been used in order to obtain the solution of the problem. The model was applied to predict the moisture content in sawn boards from pine during long term storage under outdoor climatic conditions. The satisfactory agreement between the numerical solution and experimental data was obtained.

Trehalose: a cryoprotectant that enhances recovery and preserves function of human pancreatic islets after long-term storage

Diabetes ◽  
1997 ◽  
Vol 46 (3) ◽  
pp. 519-523 ◽  
Author(s):  
G. M. Beattie ◽  
J. H. Crowe ◽  
A. D. Lopez ◽  
V. Cirulli ◽  
C. Ricordi ◽  
...  
Keyword(s):  
Pancreatic Islets ◽  
Human Pancreatic Islets ◽  
Long Term Storage ◽  
Term Storage

Humidity reliability of commercial flash memories for long-term storage

2020 ◽  
Vol 59 (SL) ◽  
pp. SLLC01 ◽  
Author(s):  
Tomoki Murota ◽  
Toshiki Mimura ◽  
Ploybussara Gomasang ◽  
Shinji Yokogawa ◽  
Kazuyoshi Ueno
Keyword(s):  
Flash Memories ◽  
Long Term Storage ◽  
Term Storage

MODERN PROBLEMATICS AND ANALYSIS OF EFFICIENCY OF APPLICATION OF DIFFERENT APPROACHES TO DESTRUCTION OF INFORMATION ON MAGNETIC MEDIA

2019 ◽  
Vol 2 (12) ◽  
pp. 154-164
Author(s):  
O. Semenenko ◽  
O. Vodchyts ◽  
V. Koverga ◽  
R. Lukash ◽  
O. Lutsenko
Keyword(s):  
Armed Forces ◽  
Information Storage ◽  
Storage Device ◽  
Magnetic Media ◽  
Long Term Storage ◽  
Physical Impact ◽  
And Storage ◽  
Term Storage

The introduction and active use of information transmission and storage systems in the Ministry of Defense (MoD) of Ukraine form the need to develop ways of guaranteed removal of data from media after their use or long-term storage. Such a task is an essential component of the functioning of any information security system. The article analyzes the problems of guaranteed destruction of information on magnetic media. An overview of approaches to the guaranteed destruction of information on magnetic media of different types is presented, and partial estimates of the effectiveness of their application are given by some generally accepted indicators of performance evaluation. The article also describes the classification of methods of destruction of information depending on the influence on its medium. The results of the analysis revealed the main problems of application of software methods and methods of demagnetization of the information carrier. The issue of guaranteed destruction of information from modern SSD devices, which are actively used in the formation of new systems of information accumulation and processing, became particularly relevant in the article. In today's conditions of development of the Armed Forces of Ukraine, methods of mechanical and thermal destruction are more commonly used today. In the medium term, the vector of the use of information elimination methods will change towards the methods of physical impact by the pulsed magnetic field and the software methods that allow to store the information storage device, but this today requires specialists to develop new ways of protecting information in order to avoid its leakage.

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