This study investigated the influence of temperature on the color development of melanoidins formed from a single combination of glucose with amino acid. The selected amino acid, commonly found in apple juice and highly reactive in the Maillard reaction, were asparagine (Asn), aspartic acid (Asp) and glutamic acid (Glu). For this, the color development was evaluated by measuring browning at 420 nm and color measurements by spectrophotometry and colorimetry methods. The effect of temperature on the color intensity, the absorption of melanoidins were also measured at different wavelengths (280, 325, 405). The value of melanoidins formed from all model systems was located on a dominant wavelength of 325 nm, the ultra violet zone of the diagram. A first-order kinetic model was applied to L* and the evolution of color difference ΔE*. In addition, a*, b* values, significantly differences were...

This study investigated the influence of temperature on the color development of melanoidins formed from a single combination of glucose with amino acid. The selected amino acid, commonly found in apple juice and highly reactive in the Maillard reaction, were asparagine (Asn), aspartic acid (Asp) and glutamic acid (Glu). For this, the color development was evaluated by measuring browning at 420 nm and color measurements by spectrophotometry and colorimetry methods. The effect of temperature on the color intensity, the absorption of melanoidins were also measured at different wavelengths (280, 325, 405). The value of melanoidins formed from all model systems was located on a dominant wavelength of 325 nm, the ultra violet zone of the diagram. A first-order kinetic model was applied to L* and the evolution of color difference ΔE*. In addition, a*, b* values, significantly differences were...

The relationship of leadership and organizational culture on performance has been empirically proven (Eppard, 2004), determining that the combination of transformational leadership and constructive culture yields in positive job performance, while on the contrary, transactional leadership and defensive culture has negative outcome. Given that both leadership and culture are constructs with differentiated variables (Bass & Avolio, 1993; Cooke & Szumal, 2000), different combinations of leadership style and organizational culture, could result in various outcome scenarios. Previous scholar findings about leadership and culture frameworks are abundant in developed economies, not so much in emerging regions such as Latin America, the latter with increasing importance in the worldwide economy. Particularly multilatinas, face the challenge of short term economic hurdles, outstanding therefore t...

The relationship of leadership and organizational culture on performance has been empirically proven (Eppard, 2004), determining that the combination of transformational leadership and constructive culture yields in positive job performance, while on the contrary, transactional leadership and defensive culture has negative outcome. Given that both leadership and culture are constructs with differentiated variables (Bass & Avolio, 1993; Cooke & Szumal, 2000), different combinations of leadership style and organizational culture, could result in various outcome scenarios. Previous scholar findings about leadership and culture frameworks are abundant in developed economies, not so much in emerging regions such as Latin America, the latter with increasing importance in the worldwide economy. Particularly multilatinas, face the challenge of short term economic hurdles, outstanding therefore t...

Advances in biomedical technology have increased the success rate of medical procedures due to improvements in safety and efficacy. During the assessment of patients with acute neurological disorder who require a lumbar puncture, some conditions may hinder its performance, such as infection at the puncture site or bone abnormalities that may cause spinal cord injury. Bedside ultrasound is a good alternative to assist in the performance of a puncture, due to its ability to examine structures that cannot be assessed by physical examination. In primary health care centers, where there may be obstacles that prevent access to expensive imaging tools, ultrasound is a cost-effective option in the approach to urgent pathologies. In view of the foregoing, this paper aims to review important recent evidence-based concepts related to the use of ultrasound for the performance of a lumbar puncture.