scholarly journals Comparative evaluation of linseed varieties under environmental conditions of Tandojam Pakistan

2022 ◽  
Vol 11 (1) ◽  
Author(s):  
Manthar Ali Sahito
Keyword(s):  
Environmental Conditions ◽  
Comparative Evaluation

Comparative Evaluation of Biofilm Formation and Tolerance to a Chemical Shock of Pathogenic and Nonpathogenic Escherichia coli O157:H7 Strains

2009 ◽  
Vol 72 (1) ◽  
pp. 157-164 ◽  
Author(s):  
N. MAROUANI-GADRI ◽  
D. CHASSAING ◽  
B. CARPENTIER
Keyword(s):  
Escherichia Coli ◽  
Stainless Steel ◽  
Environmental Conditions ◽  
Parental Strain ◽  
Biofilm Formation ◽  
Comparative Evaluation ◽  
Culture Medium ◽  
Escherichia Coli O157 ◽  
Medium Temperature ◽  
Model Strain

Seven Escherichia coli O157:H7 strains, three pathogenic (including epidemic EDL933 and Sakai) and four nonpathogenic (including mutants of EDL933 and Sakai), were compared to find a model strain to avoid the use of European third-class biological agents in biofilm studies. Comparison was performed on attached populations reached at the end of growth in eight environmental conditions defined as the combinations of three two-level factors: (i) culture medium composed of meat exudate and glucose-supplemented minimal salts medium (MSM), (ii) growth temperatures of 15 and 25°C, and (iii) materials of stainless steel and polyurethane. The influence of each of these four factors (strain, medium, temperature, and material) often depended on the level of at least one of the others. Exudate produced attached populations that were larger than or similar to those obtained with MSM, except for EDL933 mutant at 15°C. When exudate led to larger populations than did MSM, the highest differences of up to 1.8 log CFU/cm2 were observed with the nonepidemic strains grown at 25°C. Populations of these strains were not significantly different in any of the conditions studied, but they were different from the epidemic strains in some conditions. No nonpathogenic mutant was representative of its parental strain. Furthermore, the Sakai mutant biofilm was significantly more reduced than its parental strain was after chemical shock. It is therefore not possible to find a surrogate of either EDL933 or Sakai, and it is advisable that main results be validated on a pathogenic strain whenever nonpathogenic strains are used.

Vibration Isolator System for Electron Microscope

1990 ◽  
Vol 48 (1) ◽  
pp. 182-183
Author(s):  
K. Ohi ◽  
M. Mizuno ◽  
T. Kasai ◽  
Y. Ohkura ◽  
K. Mizuno ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Magnetic Fields ◽  
Environmental Conditions ◽  
Vibration Isolator ◽  
Air Conditioners ◽  
Vibration Isolators ◽  
Large Size ◽  
Electron Microscopes

In recent years, with electron microscopes coming into wider use, their installation environments do not necessarily give their performance full play. Their environmental conditions include air-conditioners, magnetic fields, and vibrations. We report a jointly developed entirely new vibration isolator which is effective against the vibrations transmitted from the floor.Conventionally, large-sized vibration isolators which need the digging of a pit have been used. These vibration isolators, however, are large present problems of installation and maintenance because of their large-size.Thus, we intended to make a vibration isolator which1) eliminates the need for changing the installation room2) eliminates the need of maintenance and3) are compact in size and easily installable.

Comparison of In-the-Ear and Over-the-Ear Hearing Aid Fittings

1986 ◽  
Vol 51 (4) ◽  
pp. 362-369 ◽  
Author(s):  
Donna M. Risberg ◽  
Robyn M. Cox
Keyword(s):  
Hearing Aids ◽  
High Frequency ◽  
Comparative Evaluation ◽  
Speech Intelligibility ◽  
Hearing Aid ◽  
Hearing Aid Fitting ◽  
The Difference ◽  
Functional Gain ◽  
The Relationship

A custom in-the-ear (ITE) hearing aid fitting was compared to two over-the-ear (OTE) hearing aid fittings for each of 9 subjects with mild to moderately severe hearing losses. Speech intelligibility via the three instruments was compared using the Speech Intelligibility Rating (SIR) test. The relationship between functional gain and coupler gain was compared for the ITE and the higher rated OTE instruments. The difference in input received at the microphone locations of the two types of hearing aids was measured for 10 different subjects and compared to the functional gain data. It was concluded that (a) for persons with mild to moderately severe hearing losses, appropriately adjusted custom ITE fittings typically yield speech intelligibility that is equal to the better OTE fitting identified in a comparative evaluation; and (b) gain prescriptions for ITE hearing aids should be adjusted to account for the high-frequency emphasis associated with in-the-concha microphone placement.

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