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Perinatal/Postnatal Study of D-003, a Mixture of Long-Chain Fatty Acids, in Rats
M.D. Rodriguez,J.E. Gonzalez,E.F. Leon,A. Gutierrez,G. Marrero,R. Gamez,H Garcia,,E Goicochea,Y. Rodriguez,A. Gomez 한국식품영양과학회 2006 Journal of medicinal food Vol.9 No.2
D-003 is a mixture of long-chain fatty acids isolated and purified from sugar cane wax with cholesterol-low-ering and antiplatelet effects. In order to further characterize the developmental toxicity during the treatment period from lategestation up to weaning of the offspring, pregnant females received 0 (control), 500, and 1,000 mg/kg/day D-003 daily byoral gavage beginning at day 15 of pregnancy and through gestation until day 21 postpartum. Maternal clinical signs, bodyweight, and food intake were measured at regular intervals during gestation and lactation. Live pups were weighed, sexed,and examined for developmental signs. One female and male of each litter were randomly selected to evaluate the reproduc-tive potential. There were no spontaneous or dose-related maternal deaths during the course of this study. The general healthand behavioral condition of offspring was good in all groups. No significant differences among groups were found in com-parisons of litter size, survival through the weaning period, sex ratio, and male and female weights. This peri- and postnatalstudy conducted with D-003 in rats indicated that treatment of the dam during late gestation and lactation did not show ad-versely effects on reproductive performance or fetal development over two generations.
A non-dimensional theoretical approach to model high-velocity impact on thick woven plates
L. Alonso,D. Garcia-Gonzalez,C. Navarro,S.K. García-Castillo 국제구조공학회 2021 Steel and Composite Structures, An International J Vol.38 No.6
A theoretical energy-based model to capture the mechanical response of thick woven composite laminates, which are used in such applications as maritime or aerospace, to high-velocity impact was developed. The dependences of the impact phenomenon on material and geometrical parameters were analysed making use of the Vaschy-Buckingham Theorem to provide a non-dimensional framework. The model was divided in three different stages splitting the physical interpretation of the perforation process: a first where different dissipative mechanisms such as compression or shear plugging were considered, a second where a transference of linear momentum was assumed and a third where only friction took place. The model was validated against experimental data along with a 3D finite element model. The numerical simulations were used to validate some of the new hypotheses assumed in the theoretical model to provide a more accurate explanation of the phenomena taking place during a high-velocity impact.
Alba Rita Valenzuela-Briseno,Jeanette Guadalupe Arredondo-D,Antonio Rascon-Careaga,Humberto stiazaran-Garcia,Agustin Gomez-Alvarez,Reynaldo Esquivel-Gonzalez,Roberto Carlos Carrillo-Torres,Enrique Alv 환경독성보건학회 2022 환경독성보건학회지 Vol.37 No.4
This study aimed to evaluate whether aluminum chloride (AlCl₃) causes hematological changes in the peripheral blood of Sprague–Dawley (SD) rats. Five groups of female SD rats were intragastrically administered with 4 different concentrations of AlCl₃ for 5 days a week for a total of 90 days. The aluminum concentration was determined via graphite furnace atomic absorption spectroscopy. Analysis of serum iron-kinetic profiles, blood cytometry outcomes, and blood smears of the blood samples. Scanning electron microscopy (SEM) and Raman spectroscopy were used to search for structural and ultrastructural changes, respectively. Blood aluminum concentration ranged 12.38-16.24 μg/L with no significant difference between experimental treatments. At the AlCl₃ concentration of 40 mg Al/kg bw of rats/day, the mean ferritin value in the serum iron kinetic profile was 29.81±6.1 ng/mL, and this value showed a significant difference between experimental treatments. Blood cytometry revealed that there were 6.45-7.11×10<SUP>6</SUP> cells/μL erythrocytes, 8.91-9.32×10³ cells/μL leukocytes, and 477.2-736.3×10³ cells/μL platelets along with a hemoglobin of 37.38-41.93 g/dL and hematocrit level of 37.38-41.93%; the experimental treatments showed no significant differences. Erythrocyte structural analysis using SEM showed no differences between experimental treatments, whereas ultrastructural evaluation using Raman spectroscopy made it possible to identify the following bands: 741, 1123, 1350, 1578, and 1618 cm<SUP>−1</SUP>, which were respectively associated with the following vibrational modes and compounds: vibration of the tryptophan ring, asymmetric C-O-C stretching of glucose, C-H curve of tryptophan, C=C stretching of the heme group, and C-N stretching of the heme group, with no significant differences between experimental treatments. Therefore, AlCl₃ administration does not induce ultrastructural changes in the erythrocyte membrane. This study revealed that serum ferritin concentration was the only parameter affected by AlCl₃ exposure at 40 mg of Al/kg bw of rats/day.