RESUMO
The skin response to high radio frequency has been associated with the human physical condition and most prominently with the stress. The objective of this study is to investigate the possibility to detect mental and light physical stress through the measurement of skin reflectance in the mm-wave/sub-THz band. Two frequency bands have been considered, 75-110 GHz (Band-I) and 325-500 GHz (Band-II), while the measurements have been performed in the three different locations, the arm, the dorsal side of the hand and the fingertip. The measurement setup is discussed in detail and the reflectance spectrum is demonstrated. The results illustrate a difference in skin reflectance under rest and stress in Band-II which ranges from 3.5 dB at the finger to 7 dB at the hand. The outcomes of this study indicate the feasibility of stress detection through skin reflectance measurement and serve as a suggestion for deeper exploration of higher frequency bands.
Assuntos
Ondas de Rádio , Pele , Estresse Fisiológico , Dedos , Humanos , LuzRESUMO
This paper reports the development of necrotic acute pancreatitis in a captive male adult Southern Brown Howler Monkey (Alouatta guariba clamitans, Cabrera, 1940) presenting acute apathy and anorexia. Blood samples were collected and supportive treatment was made although death could not be avoided. Necropsy was performed. First erythrogram results showed polycythaemia due to dehydration; second exam revealed anemia after fluid administration. Leukopenia with neutropenia suggested poor prognosis. Creatinine was in the reference range although BUN (blood urea nitrogen) was increased. Increased alanine aminotransferase, aspartate aminotransferase and creatin kinase serum activities were observed. Amylase and lipase serum activities were incredibly high. Necropsy revealed intense icterus in subcutaneous tissue and internal structures, including misshapen pancreas with rare glandular tissue. Acute pancreatitis diagnosis was made by clinical signs, laboratory findings, and necropsy.