Nitric oxide/endothelin-1 in preeclampsia

Background: Preeclampsia is characterized by vasospasm, multiple organ hypoperfusion and endothelial cell damage. Many of its signs and symptoms can be explained by an imbalance in the vasomotor tone-regulating factors, including nitric oxide (NO) and endothelin-1 (ET-1). Methods: Plasma samples of 59 women (20 healthy nonpregnant (NP), 20 normotensive pregnant (NTP) and 19 preeclamptic pregnant (PEP) women) were investigated by means of nitrite (NO2-)/nitrate (NO3-) (two end products of nitric oxide metabolism) and endothelin-1 values. Results: PEP, when compared with NP and NTP, showed a significant increase in the plasma nitrite/nitrate and endothelin-1 concentrations. There was a weak but significant correlation between the nitrite/nitrate and endothelin-1 concentrations in the NP and NTP groups (r(1) = 0.46, P < 0.05, and r(2) = 0.38, P < 0.05, respectively) which probably revealed the balance between these vasoactive factors. In PEP, no significant correlation between nitrite/nitrate and endothelin-1 was found. Increased nitric oxide production could be the compensation against the vasoconstriction and hypertension in preeclampsia. Conclusions: A lack of correlation between nitrite/nitrate and endothelin-1 probably indicates that in preeclampsia, a primary defense mechanism of the compensatory nitric oxide may be lost. (C) 2002 Elsevier Science B.V. All rights reserved

Amino acid and biochemical composition of Banded Carpet Shell (Polititapes rhomboides, Pennant, 1777), collected from the Çardak Lagoon, Turkey

Between January and December 2019, banded carpet shell (Polititapes rhomboides, Pennant 1777) were gathered from Çardak Lagoon (Çanakkale Strait). The length value was found to range from 32.92 to 36.37 mm, weight between 7.90 and 11.75 g, condition index from 4.44 to 8.70, and meat yield was found to be ranging from 11.95% to 24.95%. Negative allometry was determined in the W/L relationship of P. rhomboides. The main meat component of P. rhomboides was moisture (54.70-65.57%) and protein (52.89-62.10%) with the other components being carbohydrate (10.95-21.30%), lipid (12.79-17.18%) and ash (7.69-19.93%). The correlation between moisture and carbohydrate was positive, whereas the correlation between moisture and protein was negative (p<0.05). The present study not only informs us on composition but also recommends consumption of the species since it is easier to market and consume. Arginine amino acid was found to be the highest in quantity, which was followed by glutamic acid, serine, methionine, alanine, and aspartic acid.  Keywords: Length-weight relationship, Meat yield, Protein, Lipid, Çanakkale Strait

Amino acid and biochemical composition of Banded Carpet Shell (Polititapes rhomboides, Pennant, 1777), collected from the Çardak Lagoon, Turkey

Between January and December 2019, banded carpet shell (Polititapes rhomboides, Pennant 1777) were gathered from Çardak Lagoon (Çanakkale Strait). The length value was found to range from 32.92 to 36.37 mm, weight between 7.90 and 11.75 g, condition index from 4.44 to 8.70, and meat yield was found to be ranging from 11.95% to 24.95%. Negative allometry was determined in the W/L relationship of P. rhomboides. The main meat component of P. rhomboides was moisture (54.70-65.57%) and protein (52.89-62.10%) with the other components being carbohydrate (10.95-21.30%), lipid (12.79-17.18%) and ash (7.69-19.93%). The correlation between moisture and carbohydrate was positive, whereas the correlation between moisture and protein was negative (p<0.05). The present study not only informs us on composition but also recommends consumption of the species since it is easier to market and consume. Arginine amino acid was found to be the highest in quantity, which was followed by glutamic acid, serine, methionine, alanine, and aspartic acid.  Keywords: Length-weight relationship, Meat yield, Protein, Lipid, Çanakkale Strait