scholarly journals The early start of hemoperfusion decreases the mortality rate among severe COVID ‐19 patients: A preliminary study

2021 ◽  
Author(s):  
Haleh Mikaeili ◽  
Ali Taghizadieh ◽  
Masoud Nazemiyeh ◽  
Parisa Rezaeifar ◽  
Sepideh Zununi Vahed ◽  
...  
Keyword(s):  
Mortality Rate ◽  
Early Start ◽  
Preliminary Study

scholarly journals Preliminary observations on the effect of sudden changes of temperature on survival of young Matrinxã (Brycon cephalus) under laboratory conditions

2003 ◽  
Vol 33 (4) ◽  
pp. 719-722 ◽  
Author(s):  
Sérgio Fonsêca Guimarães ◽  
Atílio Storti Filho
Keyword(s):  
Mortality Rate ◽  
Initial Temperature ◽  
Average Length ◽  
Geographical Area ◽  
Total Mortality ◽  
Average Weight ◽  
Amazonian Fish ◽  
Different Temperatures ◽  
Species Groups ◽  
Preliminary Study

Matrinxã is a very promising amazonian fish for fish culture in Brazil. This study is aimed at determining the approximate tolerated temperature range in this species. Groups of ten young matrinxã specimens (15.1±0.8 cm average length and 58.3±10.3 g average weight) were subjected to 9 different temperatures for 24 hours without previous acclimation. Fish were transferred from an initial temperature of 27ºC to those ranging from 12 to 39ºC at 3ºC intervals. Both 12ºC and 39ºC temperatures were lethal for this species with 100% mortality rate. Following 2 minutes of exposure to 39ºC fish changed behavior, showing an increase in opercular movements and erratic swimming; mortality reached 100% after 18 minutes. At 12ºC, fish lost equilibrium immediately after exposure and started swimming erratically; after only 4 minutes fish became lethargic and remained immobile on the bottom of the tank. Total mortality was only evident following 24 hours. At 15ºC matrinxã lost equilibrium after 5 to 6 minutes of exposure but mortality was only 20% after 24 hours. Fish tolerated well temperatures ranging from 18 to 36ºC with 100% survival after 24 hours. This preliminary study suggests that temperatures between 18 and 36ºC are the approximate range normally tolerated by this species, although survival at other temperatures may be increased by gradually acclimating fish to the more severe increases or decreases in temperature. In addition, it indicates that matrinxã may be cultivated over a wide geographical area.

scholarly journals A PRELIMINARY STUDY ON THE RESPONSE OF AMPHIPHOD GRANDIDIERELLA SP. TO CONTAMINATED SEDIMENT OF JAKARTA BAY

2010 ◽  
Vol 35 (2) ◽  
pp. 31-37
Author(s):  
Dwi Hindarti ◽  
Rachma Puspitasari ◽  
Zainal Arifin
Keyword(s):  
Mortality Rate ◽  
Reference Site ◽  
Contaminated Sediments ◽  
Contaminated Sites ◽  
Mortality Factor ◽  
Strongly Correlated ◽  
Contaminated Sediment ◽  
Short Period ◽  
Significant Difference ◽  
Preliminary Study

A preliminary study on the response of amphipod exposed to contaminated sediments of Jakarta Bay was carried out in October 2009. The objective of the study was to determine the mortality rate of amphipod in response to exposure of contaminated sediments. Seven sediment samples were taken from the bay, i.e, reference site (St. A), and six-contaminated sites (St. B3, B5, C3, C5, D3, and D5). Amphipod (Grandidierella sp.) was collected from reference site. The study showed that average of mortality rate of amphipod ranged between 50.0 and 76.3% at contaminated sediments and 38.3% at reference sediments. There was significant difference on mortality rate of amphipod exposed to sediments of reference site and that of contaminated sites. The mortality of Grandidierella sp. was not strongly correlated with the concentration of Pb and Cu in contaminated sediments. The critical mortality factor of amphipod in this study might be due to variation in grain size of sediments and short period of acclimatization.

scholarly journals Evaluation of Phytochemical, Antiproliferative and Larvicidal Activity of Gliricidia Sepium Leaves

2020 ◽  
pp. 207-217
Author(s):  
V. Malarvizhi ◽  
K. Sivagamasundari
Keyword(s):  
Mortality Rate ◽  
Larvicidal Activity ◽  
Plant Extracts ◽  
Cytotoxic Effect ◽  
Methanolic Extract ◽  
Gliricidia Sepium ◽  
Anopheles Mosquitoes ◽  
Larvicidal Effect ◽  
Gastric Cells ◽  
Preliminary Study

Medicinal plants based drugs and chemicals used for curing enormous ailments and it help for the invention of modern pharmaceuticals. The target of this present study is to find out the bioactive compounds and to evaluate antiproliferative and larvicidal effect on Gliricidia sepium leaves. Phytochemical determination was oriented to search secondary metabolites and this preliminary study shows Gliricidia sepium it has alkaloid, flavanoids, phytosteroids, steroids, tannins, terpenoids, mucilage, and coumarins. In this Research a significant cytotoxic effect was observed in Gliricidia sepium methanolic extract against Adenocarcinoma gastric cells. The larvicidal activity was observed by using aqueous and methanolic plant extracts on Anopheles mosquitoes and shows a high mortality rate on 48 hours after the plant extracts exposure. The result of this study shows this plant has significant phytochemicals and potential antiproliferative and Larvicidal effects.

The Ultrastructure of Metastatic Human Mammary Carcinoma After Prolonged Estrogen Therapy

1967 ◽  
Vol 25 ◽  
pp. 180-181
Author(s):  
John H.L. Watson ◽  
John L. Swedo ◽  
R.W. Talley
Keyword(s):  
Mammary Carcinoma ◽  
Osmium Tetroxide ◽  
Estrogen Therapy ◽  
Ultrastructural Level ◽  
Uranyl Acetate ◽  
Human Mammary Carcinoma ◽  
Surgical Biopsy ◽  
Lead Hydroxide ◽  
Preliminary Study ◽  
Hormonal Therapies

A preliminary study of human mammary carcinoma on the ultrastructural level is reported for a metastatic, subcutaneous nodule, obtained as a surgical biopsy. The patient's tumor had responded favorably to a series of hormonal therapies, including androgens, estrogens, progestins, and corticoids for recurring nodules over eight years. The pertinent nodule was removed from the region of the gluteal maximus, two weeks following stilbestrol therapy. It was about 1.5 cms in diameter, and was located within the dermis. Pieces from it were fixed immediately in cold fixatives: phosphate buffered osmium tetroxide, glutaraldehyde, and paraformaldehyde. Embedment in each case was in Vestopal W. Contrasting was done with combinations of uranyl acetate and lead hydroxide.

Fine structure of early degenerating myofibers in the tibialis anterior of young ‘MDX’ mouse

1988 ◽  
Vol 46 ◽  
pp. 322-323
Author(s):  
H.D. Geissinger ◽  
C.K. McDonald-Taylor
Keyword(s):  
Fine Structure ◽  
Muscle Regeneration ◽  
Tibialis Anterior ◽  
Genetic Defect ◽  
Mdx Mouse ◽  
Mdx Mice ◽  
Histopathological Changes ◽  
Electron Microscopic ◽  
Dystrophic Mouse ◽  
Preliminary Study

A new strain of mice, which had arisen by mutation from a dystrophic mouse colony was designated ‘mdx’, because the genetic defect, which manifests itself in brief periods of muscle destruction followed by episodes of muscle regeneration appears to be X-linked. Further studies of histopathological changes in muscle from ‘mdx’ mice at the light microscopic or electron microscopic levels have been published, but only one preliminary study has been on the tibialis anterior (TA) of ‘mdx’ mice less than four weeks old. Lesions in the ‘mdx’ mice vary between different muscles, and centronucleation of fibers in all muscles studied so far appears to be especially prominent in older mice. Lesions in young ‘mdx’ mice have not been studied extensively, and the results appear to be at variance with one another. The degenerative and regenerative aspects of the lesions in the TA of 23 to 26-day-old ‘mdx’ mice appear to vary quantitatively.

Ultrastructural observations of the aorta of calves implanted with a mechanical left ventricular assist device

1990 ◽  
Vol 48 (3) ◽  
pp. 834-835
Author(s):  
J P Cassella ◽  
V Salih ◽  
T R Graham
Keyword(s):  
Left Ventricular Assist Device ◽  
Ventricular Assist Device ◽  
Left Ventricular ◽  
Aortic Tissue ◽  
Assist Device ◽  
Ventricular Assist ◽  
Transmission Electron ◽  
Left Ventricular Assist ◽  
Preliminary Study

Left ventricular assist systems are being developed for eventual long term or permanent implantation as an alternative to heart transplantation in patients unsuitable for or denied the transplant option. Evaluation of the effects of these devices upon normal physiology is required. A preliminary study was conducted to evaluate the morphology of aortic tissue from calves implanted with a pneumatic Left Ventricular Assist device-LVAD. Two 3 month old heifer calves (calf 1 and calf 2) were electively explanted after 128 days and 47 days respectively. Descending thoracic aortic tissue from both animals was removed immediately post mortem and placed into karnovsky’s fixative. The tissue was subsequently processed for transmission electron microscopy (TEM). Some aortic tissue was fixed in neutral buffered formalin and processed for routine light microscopy.

A preliminary study on the potential of front face fluorescence spectroscopy for the discrimination of Moroccan virgin olive oils and the prediction of their quality

2021 ◽  
Author(s):  
Hicham Zaroual ◽  
El Mestafa El Hadrami ◽  
Romdhane Karoui
Keyword(s):  
Fluorescence Spectroscopy ◽  
Olive Oil ◽  
Virgin Olive Oil ◽  
Front Face ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Preliminary Study

This study examines the feasibility of using front face fluorescence spectroscopy (FFFS) to authenticate 41 virgin olive oil (VOO) samples collected from 5 regions in Morocco during 2 consecutive crop seasons.

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