Comparative Study of Latex-Modified Concretes and Normal Concretes Subjected to Freezing and Thawing in the Presence of a Deicer Salt Solution

10.14359/4001 ◽  
1992 ◽  
Vol 89 (6) ◽  
Keyword(s):  
Comparative Study ◽  
Salt Solution ◽  
Freezing And Thawing

scholarly journals Effect of Reformation of the Anterior Chamber by Air or by a Balanced Salt Solution (BSS) on Corneal Endothelium after Phacoemulsification: A Comparative Study

2018 ◽  
Vol 2018 ◽  
pp. 1-5
Author(s):  
Alahmady Hamad Alsmman ◽  
Mohammed Ezzeldawla ◽  
Amr Mounir ◽  
Ashraf Mostafa Elhawary ◽  
Osama Ali Mohammed ◽  
...  
Keyword(s):  
Comparative Study ◽  
Anterior Chamber ◽  
Salt Solution ◽  
Corneal Endothelium ◽  
University Hospital ◽  
Dissipated Energy ◽  
Cumulative Dissipated Energy ◽  
Group 2 ◽  
Age Range ◽  
Group 1

Aim. To study the effect of reformation of the anterior chamber by air or by a balanced salt solution, after smooth phacoemulsification on the corneal endothelial count and morphology. Methods. A prospective interventional nonrandomized comparative study included 500 eyes of 500 patients with age range between 50 and 60 years, prepared for cataract surgery and presented to the Ophthalmology department of Sohag University Hospital in the period from October 2016 to May 2017. Corneal endothelial morphology and count were examined, and the results were recorded for all cases before the surgery. Patients were divided into two groups, and both groups were diagnosed with grade 2 cataract and underwent uncomplicated phacoemulsification performed by well-trained surgeons. At the end of the surgery, group 1 was subjected to a reformation of the anterior chamber via a balanced salt solution (BSS) injection while group 2 was subjected to a reformation of the anterior chamber via air injection. Corneal endothelial morphology and count were evaluated in the first and 3rd month postoperatively. Results. The study included 500 patients (250 in each group), 220 males (44%) and 280 females (56%) with no significant statistical age differences. Both preoperative and postoperative (3 months after the operation) recorded parameters of the corneal endothelium did not show any significant statistical differences. The cumulative dissipated energy was recorded, for all cases of both groups, during phacoemulsification with no significant statistical differences (P=0.7). Conclusion. There is no difference between the effect of reformation of the anterior chamber after phacoemulsification, using air or using a BSS injection, on the corneal endothelial count and morphology.

scholarly journals REVERSIBLE INACTIVATION OF TYPHUS RICKETTSIAE

1954 ◽  
Vol 38 (2) ◽  
pp. 169-179 ◽  
Author(s):  
Marianna R. Bovarnick ◽  
Emma G. Allen
Keyword(s):  
Salt Solution ◽  
Hemolytic Activity ◽  
Coenzyme A ◽  
Salt Solutions ◽  
Freezing And Thawing ◽  
Reversible Inactivation ◽  
Low Concentrations ◽  
Isotonic Salt Solution

Rickettsiae that have been frozen and thawed in isotonic salt solutions show greatly decreased toxicity for mice, hemolytic activity, respiration, and infectivity for eggs. All these properties can be partially restored by incubation of the rickettsiae in the presence of DPN and coenzyme A for 2 hours at 34°C. The extent of both inactivation and of subsequent reactivation is markedly affected by the presence of low concentrations of sucrose during the process of freezing and thawing. It has been shown that DPN is present in rickettsial suspensions and that in preparations that have not been frozen, the DPN sediments with the rickettsiae. After freezing in isotonic salt solution the DPN becomes non-sedimentable.

A comparative study on the diagnostic sensitivity of rodent sperm and embryos in the detection of endotoxin in earle's balanced salt solution

1994 ◽  
Vol 11 (1) ◽  
pp. 38-42 ◽  
Author(s):  
A. D. Esterhuizen ◽  
E. Bosman ◽  
A. D. E. Botes ◽  
O. A. Groenewald ◽  
M. V. K. Giesteira ◽  
...  
Keyword(s):  
Comparative Study ◽  
Salt Solution ◽  
Diagnostic Sensitivity

Survival of Infectious Hematopoietic Necrosis Virus Held Under Various Environmental Conditions

1977 ◽  
Vol 34 (9) ◽  
pp. 1360-1364 ◽  
Author(s):  
John P. Pietsch ◽  
Donald F. Amend ◽  
Christine M. Miller
Keyword(s):  
Salt Solution ◽  
Calf Serum ◽  
Infectious Hematopoietic Necrosis Virus ◽  
Significant Loss ◽  
Deionized Water ◽  
Virus Infectivity ◽  
Freezing And Thawing ◽  
Necrosis Virus ◽  
Infectious Hematopoietic Necrosis ◽  
Virus Survival

Dehydration of infectious hematopoietic necrosis virus (IHNV) from water at 4 and 10 °C resulted in only partial inactivation, but dehydration from Hanks' balanced salt solution (HBSS) and homogenized fish tissue resulted in total loss of virus infectivity within 7 days. Survival was not affected by pH between 6 and 8, but virus infectivity was significantly reduced at pH 5 and 9. Water hardness from 20 to 250 mg/ℓ (as CaCO3) did not significantly reduce virus infectivity. Salinity distinctly affected IHNV survival: storage in artificial seawater, filtered ocean water, HBSS. and Earle's balanced salt solution (EBSS) equally reduced virus titers. The addition of protein to deionized water and EBSS and HBSE resulted in increased survival. Survival of IHNV was inversely proportional to HBSS concentration and was highest when it was frozen in media supplemented with 10% calf serum. Virus survival was good at −70 and −20 °C, but virus infectivity decreased sharply with an increase of temperature above 4 °C; increasingly poor survival occurred at 15. 21, 28, and 32 °C. Freezing and thawing of IHNV had no effect if the media contained 10% protein; however, freezing in deionized water resulted in a significant loss of virus infectivity. Key words: virology, virus survival, laboratory storage, environmental effects

scholarly journals Relationship Between Ion Content in Seed and Spongy Coat of the Medicinal Halophyte Crithmum maritimum L. and Germination Capacity

2010 ◽  
Vol 2 (2) ◽  
pp. 72-74 ◽  
Author(s):  
Abdallah ATIA ◽  
Ahmed DEBEZ ◽  
Chedly ABDELLY ◽  
Abderrazak SMAOUI
Keyword(s):  
Comparative Study ◽  
Salt Solution ◽  
Mineral Content ◽  
Distilled Water ◽  
Germination Capacity ◽  
Ion Content ◽  
Wide Range ◽  
Efficient Mechanisms ◽  
Determining Factor ◽  
Seeds And Fruits

Halophytes thrive in a wide range of habitats and climates, which may largely determine the seed mineral content, and hence influence both their germination capacity and their subsequent establishment. In order to assess this hypothesis, we performed a comparative study on three Tunisian proveniences of the perennial oilseed halophyte Crithmum maritimum L. The ion (Cl-, K+, and Na+) contents in seeds and fruits were determined and their likely relationship to germination capacity was addressed. Whether seeds were sown in distilled water or under moderate salt solution (100 mM NaCl) germination of the three proveniences was negatively correlated with the seed K+, Na+ and Cl- content. The spongy coats (fruits) were found to accumulate much more Na+ and Cl- than seeds (up to aprox. 8- and 11- fold, respectively for Na+ and Cl-), indicating that efficient mechanisms may take place in order to protect seeds from the harmful accumulation of salt. In addition, the higher selectivity for K+ vs. Na+ within seeds as compared to fruits seemed to be a determining factor in germination capacity of this species.

scholarly journals Comparative Study of Formalin Solution and Saturated Salt Solution for Embalming Cadavers for Surgical Skills Training

2020 ◽  
Vol 9 (1) ◽  
pp. 33-37
Author(s):  
Rachna Gulati ◽  
◽  
Manish S Ahuja ◽  
Vijay Langer ◽  
Parikshat Gopal ◽  
...  
Keyword(s):  
Comparative Study ◽  
Salt Solution ◽  
Skills Training ◽  
Surgical Skills ◽  
Saturated Salt Solution ◽  
Surgical Skills Training
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