Direct Dissolution of Large-Size Ball-Type High-Density High-Purity α-Alumina by PTFE Pressure Bomb Method

2016 ◽  
Vol 37 (2) ◽  
pp. 262-265
Author(s):  
Jung Ki Suh ◽  
Chang Soo Kim ◽  
Myung Sub Han ◽  
Hwa Shim Lee
Keyword(s):  
High Purity ◽  
High Density ◽  
Large Size ◽  
Pressure Bomb ◽  
Direct Dissolution ◽  
Bomb Method

Making and testing refractories from high-density, high-purity magnesite powder

Refractories ◽  
1980 ◽  
Vol 21 (5-6) ◽  
pp. 283-285
Author(s):  
V. G. Borisov ◽  
S. A. Stegantsev ◽  
G. G. Mel'nikova ◽  
E. P. Mezentsev ◽  
K. V. Simonov
Keyword(s):  
High Purity ◽  
High Density ◽  
Magnesite Powder

A comparison of systematic errors between the Richards and Hammel methods of measuring tissue – water relations parameters

1978 ◽  
Vol 56 (17) ◽  
pp. 2153-2161 ◽  
Author(s):  
M. T. Tyree ◽  
M. E. MacGregor ◽  
A. Petrov ◽  
M. I. Upenieks
Keyword(s):  
Cell Wall ◽  
Osmotic Pressure ◽  
Water Relations ◽  
Turgor Pressure ◽  
Systematic Errors ◽  
Tissue Water ◽  
Cell Wall Elasticity ◽  
Pressure Bomb ◽  
Bomb Method

The pressure bomb is being used to a much greater extent to measure some tissue – water relations parameters such as osmotic pressure, turgor pressure, and cell wall elasticity. Recently, Richards has developed a faster pressure-bomb method of obtaining these and other parameters than the method used by Hammel and modified by us. In this paper, we compare the two methods and conclude that Richards’ method should not be used when accuracy is deemed important. The Richards method usually overestimates osmotic pressure by 0.2 MPa (= 2 bars) and sometimes by 0.8 MPa (= 8 bars).

scholarly journals Crystal growth and detector performance of large size High-purity Ge crystals

2015 ◽  
Vol 39 ◽  
pp. 54-60 ◽  
Author(s):  
Guojian Wang ◽  
Mark Amman ◽  
Hao Mei ◽  
Dongming Mei ◽  
Klaus Irmscher ◽  
...  
Keyword(s):  
Crystal Growth ◽  
High Purity ◽  
Detector Performance ◽  
Large Size

Application of the Scholander pressure bomb to studies on endophytic bacteria of plants

1997 ◽  
Vol 43 (5) ◽  
pp. 411-416 ◽  
Author(s):  
J. Hallmann ◽  
J. W. Kloepper ◽  
R. Rodríguez-Kábana
Keyword(s):  
Endophytic Bacteria ◽  
Vascular Plant ◽  
Taxonomic Diversity ◽  
Common Species ◽  
Root Surface ◽  
Plant Colonization ◽  
Root Cortex ◽  
Bacillus Spp ◽  
Pressure Bomb ◽  
Bomb Method

The Scholander pressure bomb system, which expresses vascular plant sap, was compared with the trituration method, in which roots are surface disinfested and triturated, for recovery of endophytic bacteria. The two methods were compared for recovery of indigenous and introduced endophytes from roots of several plant genera. The pressure bomb method was acceptable for routine recovery of endophytes from cotton (Gossypium hirsutum), soybean (Glycine max), and bean (Phaseolus vulgaris), but owing to tissue collapse under pressure, the method did not work reliably for cucumber (Cucumis sativa) or tomato (Lycopersicon esculentum) seedlings. High bacterial densities on the root surface, experimentally obtained by dipping cotton roots into a suspension of Enterobacter asburiae JM22 immediately prior to processing, did not affect the population densities of recovered indigenous endophytic bacteria by the pressure bomb technique but resulted in increased bacterial densities for the trituration method. Internal populations of JM22 following application as a seed treatment were statistically equivalent with the trituration and pressure bomb techniques. Analysis of taxonomic diversity of a group of indigenous endophytes recovered with the trituration and pressure bomb techniques indicated some differences between the two groups. The total number of bacterial genera and species recovered was greater using the pressure bomb method. Gram-positive species, such as Bacillus spp., were more frequently isolated with the trituration method than with the pressure bomb method. Agrobacterium radiobacter and less common species were more often isolated using the pressure bomb technique. Pseudomonas spp. and Phyllobacterium spp. were recovered with equal frequencies using both techniques. These results suggest that the two techniques sample two different internal habitats available for colonization by endophytic bacteria, i.e., the trituration method recovering mainly endophytes residing in the root cortex and the pressure bomb method detecting vascular colonists. A combination of both methods is recommended for understanding the full pattern of internal plant colonization by endophytic bacteria.Key words: endophytic bacteria, Scholander pressure bomb, isolation method, cotton.

scholarly journals Cellular-scale silicon probes for high-density, precisely-localized neurophysiology

2020 ◽  
Author(s):  
Daniel Egert ◽  
Jeffrey R Pettibone ◽  
Stefan Lemke ◽  
Paras R. Patel ◽  
Ciara M. Caldwell ◽  
...  
Keyword(s):  
Brain Structures ◽  
High Density ◽  
Intracranial Volume ◽  
Neural Implants ◽  
Brain Functions ◽  
Large Size ◽  
Large Numbers ◽  
Size Limits ◽  
Tissue Reactions ◽  
Silicon Based

AbstractNeural implants with large numbers of electrodes have become an important tool for examining brain functions. However, these devices typically displace a large intracranial volume compared to the neurons they record. This large size limits the density of implants, provokes tissue reactions that degrade chronic performance, and impedes the ability to accurately visualize recording sites within intact circuits. Here we report next-generation silicon-based neural probes at cellular-scale (5×10µm cross-section), with ultra-high-density packing (as little as 66µm between shanks) and 64 or 256 closely-spaced recording sites per probe. We show that these probes can be inserted into superficial or deep brain structures and maintain high-quality spike recordings in freely behaving rats for many weeks. Finally, we demonstrate a slice-in-place approach for the precise registration of recording sites relative to nearby neurons and anatomical features, including striatal µ-opioid receptor patches. This scalable technology provides a valuable tool for examining information processing within neural circuits, and potentially for human brain-machine interfaces.

Development of large size high-purity germanium crystal growth

2012 ◽  
Vol 352 (1) ◽  
pp. 27-30 ◽  
Author(s):  
Guojian Wang ◽  
Yongchen Sun ◽  
Gang Yang ◽  
Wenchang Xiang ◽  
Yutong Guan ◽  
...  
Keyword(s):  
Crystal Growth ◽  
High Purity ◽  
Germanium Crystal ◽  
Large Size ◽  
High Purity Germanium
Sign in / Sign up

Export Citation Format

Share Document