The post-thawed viability without Me2SO was 60% for I. galbana, 52% for D. salina and 33% for C. vulgaris. Fast freezing was not suitable for cryo-storage of I. galbana but gave good post-thawing viability
for D. salina (70%). The decrease in fatty acid content of the cryo-stored algae was influenced by the temperature. The rapid decrease in temperature induced by fast freezing can explain the low level of fatty acid content of the three cryo-stored algae. Fatty acid profiles show that the nutritional values of the three cryo-stored micro-algae were not significantly affected especially when treated with slow cooling protocols. (C) 2010 Elsevier Ltd. All rights reserved.”
“Purpose: Myocardial mitochondria are the primary part of energy production for healthy cardiac contraction. And mitochondrial
dysfunction would play an important role in progressive heart failure. In the recent years, myocardial see more washout of Tc-99m-sestamibi [(Tc-99m-hexakis-2-methoxy-2-methylpropyl isonitrile (MIBI)] has been introduced to be a potential marker in patients with heart failure. The objective of this study was to clarify MIBI extraction and washout kinetics using isolated perfusion system in hypertension induced model of myocardial dysfunction.
Methods: Six-week-old Dahl-salt sensitive rats, allotted to 4 groups; a 5-week high-salt group (5wk-HS), 12-week high-salt group (12wk-HS) and two age-matched, low-salt diet control groups (5wk-LS and 12wk-LS). The rats in 5wk-HS and 12wk-HS groups were fed a high-salt diet (containing Nocodazole 8% NaCl). Cardiac function was examined by echocardiography before removing heart. Hearts were perfused according to the Langendoiff method at a constant flow rate, in which 20-min MIBI washin was conducted followed by 25-min MIBI washout. Whole heart radioactivity was collected every sec by an external FER gamma detector. The myocardial extraction, K-1 (ml/min) and washout rate, k(2) (min(-1)) were generated.
Results: High-salt diet groups showed significant high-blood pressure. Echocardiography
revealed thickened LV walls in 5wk-HS, and reduced cardiac function in 12wk-HS, compared to each age-matched control group. K1 showed no significant difference among all groups (5wk-HS: 2.36 +/- 1.07, 5wk-control: 2.59 +/- 0.28, 12wk-HS: 1.91 +/- 0.90, and 12wk-control: 2.84 +/- 0.57). k(2) in 5wk-HS was comparable to that in the age matched control group (0.00030 +/- 0.00039 vs -0.000010 +/- 0.00044), but it was increased remarkably in 18wk-HS compared to the age matched control group (0.0025 +/- 0.0011 vs 0.000025 +/- 0.000041, P<.01), and 5wk-HS (P<.01).
Conclusion: In the course of hypertensive heart disease, MIBI washout was increased in the transitional state from hypertrophied to dilated and failing heart, while MIBI extraction remained intact. (C) 2010 Elsevier Inc. All rights reserved.”
“In this study, we examined infrared thermograms in the course of time of six African zoo elephants and observed two phenomena.