ANALISIS KADAR MERKURI PADA BIOTA AIR DENGAN NANOPARTIKEL PERAK SECARA CITRA DIGITAL DI LOKASI PENAMBANGAN EMAS KABUPATEN LEBONG

This study aimed at determining of how the sensitivity of silver nanoparticles (NPP) in detecting metal mercury in aquatic biota samples through digital imagery. The Sampling of aquatic biota was carried out in the gold mining location of Lebong Tambang village in Lebong district (102 ° 12'00 "-102 ° 18'05" BT and 3 ° 10'00 "-3 ° 17 ' 00 "LS.) The aquatic biota samples analyzed included fish, shellfish, shrimp and plants as well as comparison samples such as water and sediment. The Analysis of mercury level was carried out from December 2018 - March 2019 by using NPP of digital imagery method. The digital imagery method was used as a detector to replace the conventional spectrophotometer. The result of mercury level in aquatic biota with NPP in digital imagery was susceptible compared to the UV-Vis spectrophotometry method. It can be seen from the Limit Of Detection (LOD) score of the digital imagery method with the SLR data analysis technique by using a digital camera that is equal to 2.305 ppb, where the score was smaller than the LOD value in spectrophotometry which is 300 ppb. The results of the analysis of mercury level by using digital imagery method were obtained the concentration on pool shells of 196.8 ppb, in pond fish samples of 155.7 ppb, in shrimp samples of 81.2 ppb, in river fish samples of 81.1 ppb, and in plant samples of 50.9 ppb. thus, these results indicate that the presence of mercury ions in the samples of aquatic biota tested has levels above the threshold, which means samples of fish, shrimp, shellfish and plants were risk to be consume

Effects of Temperature and Angular Velocity on Eccentric Force of an Intrinsic Thumb Muscle

Temperature and velocity have significant effects on muscle contractile properties. For example, it is well known that changing angular velocity and altering muscle temperature can change the force-producing capacity of muscle. It is typically understood that with increasing shortening velocity and cooler temperature force decreases. However, the influence of temperature and angular velocity on force during lengthening contractions is less understood.  The purpose of this study was to determine whether temperature and/or velocity has an effect on the eccentric to isometric force ratio of the adductor pollicis muscle in young males. Ten young (~25y) male subjects performed lengthening (0-40°) electrically-evoked contractions of the left adductor pollicis muscles at ~50% of maximum voluntary force at angular velocities ranging from 0-320°/s. This procedure was performed initially at room temperature (21˚C), and then repeated two more times after a 20min bath, first in a cold (15°C) water and then in a warm (43°C) water bath in order to change the muscle temperature. The eccentric to isometric ratio was significantly greater in the cold compared to the normal condition (P<0.05), but was not different from normal for the warm condition (P>0.05). The eccentric to isometric ratio was significantly greater at 80, 160 and 320°/s (P<0.05) than at 20°/s, but was not different at velocities slower than 80°/s (P>0.05).  Instantaneous stiffness was measured 1 s after attaining maximum stretch. There was a significant (~38%) increase in active stiffness in the cold muscle compared to normal. No significant difference (~15%) in stiffness was observed for the warm compared with the normal condition, and no significant difference (~20%) was found between warm and cold muscles. The findings suggest that there is an increased force per cross-bridge as temperature approaches normal physiological temperature, but decreases when temperature deviates from normal

Cyberscience Undergraduate Faculty and School Official Perspectives of the Innovation and Implementation of Curriculum for Inclusion

AbstractA disproportionate number of European American male students are enrolled in cyberscience undergraduate degree programs, despite attempts to attract diverse student populations in the field. The purpose of the basic qualitative study was to gain a better understanding on how cyberscience academic experts perceive the challenges related to the disproportionate number of European American male students enrolled in cyberscience degree programs nationwide and how to attract college students from diverse backgrounds for cyberscience programs. Using Rogers’s diffusion of innovation, the research questions explored cyberscience academic expert perceptions of the challenges of enrollment in cyberscience programs and attracting students from diverse backgrounds. Purposeful sampling was used to recruit individuals who met the definition of academic experts in cyberscience and with knowledge of the challenges posed by the disproportionate number of European American male students in the cyberscience field. Data were collected using semistructured interviews with eight participants. Data were analyzed using a priori and open coding of interview transcripts. Four conclusions can be drawn from the findings: all experts agree that diversity is needed in the field and that higher education has an important role in bringing about diversity, more workers are needed in the United States, several academic experts do not see cyberscience curriculum as appropriate to address the need for more diversity, and there is a consensus that properly briefed and informed college and university enrollment teams do have a key role in bringing about this needed diversity. Positive social change may occur because the findings could inform university officials on how to attract diverse populations, thereby increasing inclusion in this field while addressing the job shortage

Cyberscience Undergraduate Faculty and School Official Perspectives of the Innovation and Implementation of Curriculum for Inclusion

AbstractA disproportionate number of European American male students are enrolled in cyberscience undergraduate degree programs, despite attempts to attract diverse student populations in the field. The purpose of the basic qualitative study was to gain a better understanding on how cyberscience academic experts perceive the challenges related to the disproportionate number of European American male students enrolled in cyberscience degree programs nationwide and how to attract college students from diverse backgrounds for cyberscience programs. Using Rogers’s diffusion of innovation, the research questions explored cyberscience academic expert perceptions of the challenges of enrollment in cyberscience programs and attracting students from diverse backgrounds. Purposeful sampling was used to recruit individuals who met the definition of academic experts in cyberscience and with knowledge of the challenges posed by the disproportionate number of European American male students in the cyberscience field. Data were collected using semistructured interviews with eight participants. Data were analyzed using a priori and open coding of interview transcripts. Four conclusions can be drawn from the findings: all experts agree that diversity is needed in the field and that higher education has an important role in bringing about diversity, more workers are needed in the United States, several academic experts do not see cyberscience curriculum as appropriate to address the need for more diversity, and there is a consensus that properly briefed and informed college and university enrollment teams do have a key role in bringing about this needed diversity. Positive social change may occur because the findings could inform university officials on how to attract diverse populations, thereby increasing inclusion in this field while addressing the job shortage

FK 506 pre-treatment is associated with reduced levels of tumor necrosis factor and interleukin 6 following hepatic ischemia/reperfusion

Using a rat model, the effect of pre-treatment with FK 506 on hepatic ischemia/reperfusion injury was investigated. All control animals died within 72 h of the ischemia/reperfusion injury. Pre-treatment of the animals with FK 506 (0.3 mg/kg in 0.5 ml saline) administered intravenously improved survival. The most striking protection against fatal ischemia/reperfusion injury was achieved in rats that were given FK 506 6 and 24 h prior to the induction of the hepatic ischemic insult (70% and 80% 10-day survival rates, respectively). The hepatoprotective effect of FK 506 was assessed further in a second experiment in which the serum levels of tumor necrosis factor (TNF) and interleukin 6 (IL-6) were measured. These results suggest that a 60-min period of hepatic ischemia and subsequent reperfusion triggers the release of both TNF and IL-6, and that FK 506 pre-treatment (6 h before the ischemic episode) significantly inhibits the production and/or release of these two cytokines compared to untreated controls. These data provide additional information concerning the immunosuppressive and hepatoprotective activities of FK 506. Based upon these data, it is probable that FK 506 attenuates hepatic ischemia/reperfusion injury, at least in part, by reducing TNF and IL-6 levels. © 1993 Elsevier Scientific Publishers Ireland Ltd. All rights reserved

AKTIVITAS ANTIOKSIDAN DAN ANTIBAKTERI EKSTRAK DAUN Strobilanthes crispus Bl (Keji Beling) ) TERHADAP Staphylococcus aureus DAN Escherichia coli

[ANTIXOXIDANT AND ANTIBACTERIA ACTIVITIES OF Strobilanthes crispus Bl (Keji Beling) EXTRACT AGAINST Stapylococcus Aureus AND Escherichia coli] Strobilanthes crispus Bl (Keji Beling)  is one of herbs that has been used for the treatment of several types of diseases such as kidney stones, gall stones, diabetes, cholesterol, tumors and others. The purpose of this study was to determine the value of antioxidant activity (IC50) and antibacterial activity of ethanol extract of leaf vermicelli against Staphylococcus aureus and Escherichia coli bacteria. Antioxidant test was performed using DPPH method and vitamin C was used as standard. While the antibacterial activity test done by paper disc method. Amphicillin is used as a positive control and aquades as a negative control. Ethanol extract of leaf vermicelli able to counteract free radical of DPPH with IC50 value that is: 102.85 ppm and IC50 value from vitamin C as comparative solution equal to 19.268 ppm. The results of antibacterial inhibition test of ethanol extract of vile leaf on S. aureus bacteria with extract concentration of 20% (0 mm), 40% (2.5 mm), 60% (3.25 mm), and 80% (4.75) were included Weak and 100% (5.75 mm) including Medium, and E.coli antibacterial inhibition in the extract con- tacts of 20% (0 mm), 40% (2 mm), 60% (2.25 mm), 80% (4.25 mm) were weak, and 100% (5.25 mm ) including moderate. So it is known that the extract of ethanol leaves vile at 100% concentration can inhibit the growth of S. aureus bacteria and E. coli bacteria characterized by the formation of the largest clear zone diameter at the concentration. But the strength of its bacteria is still not effective to inhibit the growth of both test bacteria

Rehabilitación cardiaca en mujeres y hombres después de un infarto agudo del miocardio

Fundamento: la rehabilitación cardiovascular favorece la recuperación de los pacientes que sufren de infarto del agudo del miocardio. Objetivo: caracterizar la rehabilitación cardiovascular en mujeres y hombres con un primer infarto agudo de mio-cardio no complicado con elevación del segmento ST. Métodos: se realizó un estudio descriptivo y transversal en el Centro de Atención Cardiovascular del Hospital Pro-vincial Docente Clínico Quirúrgico Manuel Ascunce Domenech de Camagüey en el período comprendido entre sep-tiembre de 2015 hasta septiembre del 2016. La muestra estuvo constituida por 65 pacientes a los que se realizó una prueba ergométrica y ecocardiograma pre-alta y 6 semanas después de rehabilitados. A los cinco años se evaluó supervivencia. Se realizó prueba de ergométrica máxima limitada por síntomas para determinar estratificación de riesgo, capacidad funcional, prescripción de la actividad y proporcionar información al paciente. Resultados: hubo mayor incidencia de infarto rehabilitado en el sexo masculino, el grupo de edad más afectado fue el de 50-59 años y la hipertensión arterial fue el factor de riesgo cardiovascular predominante. Hubo notable mejoría en los parámetros ergométricos y hemodinámicos después de las 6 semanas de la rehabilitación. La reac-ción hipertensiva y la disnea, disminuyeron en la mayoría de los casos al final del estudio. Los pacientes que co-menzaron el estudio mejoraron su clase funcional a las 6 semanas de rehabilitados y hubo un incremento de la categoría riesgo bajo a expensas del riesgo moderado. La supervivencia a los cinco años fue del 89,9 %. Conclusiones: se obtuvo una significativa mejoría de parámetros clínicos y ergométricos, así como la reincorpora-ción a las labores cotidianas en los pacientes que participaron en el programa. Las mujeres recibieron menos bene-ficios de este programa que los hombres