Rodrigo Silva | Universidade Federal de Mato Grosso (UFMT) (original) (raw)
Papers by Rodrigo Silva
Revista Brasileira de Parasitologia Veterinária, 2015
Neosporosis is an emergent disease responsible for considerable economic impact due to reproducti... more Neosporosis is an emergent disease responsible for considerable economic impact due to reproductive losses. Its zoonotic potential remains unknown. This study involved a survey of antibodies to Neospora caninum in slaughtered sheep and their association with epidemiological variables. Serum samples from 596 sheep from the states of São Paulo and Rio Grande do Sul, Brazil, were collected in two slaughterhouses located in São Paulo and evaluated by indirect fluorescence antibody test (IFAT), using cut-off titers of 25. Among these samples, 353/596 (59.23%; 95%CI 55.23-63.10) were positive and 263/353 (74.50%; 95%CI 69.71-78.77%) were from Rio Grande do Sul. Statistical associations were determined in the univariate analysis between the serological results and sex, breed and municipality of origin. Sheep that came from extensive breeding system showed higher chance (OR=2.09) of presenting antibodies to N. caninum in relation to those from semi-intensive system. Higher chance was also observed for the different studied breeds, except Bergamácia, in relation to Hampshire Down. The results revealed the presence of infection by N. caninum in sheep from slaughterhouses.
![Research paper thumbnail of [Continued vigilance actions, dogs role as sentinel animal to toxoplasmosis]](https://attachments.academia-assets.com/46007155/thumbnails/1.jpg)
](Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária, 2008
Toxoplasmosis is a worldwide zoonosis caused by Toxoplasma gondii and its definitive host is the ... more Toxoplasmosis is a worldwide zoonosis caused by Toxoplasma gondii and its definitive host is the domestic and wild felids infecting human beings and other warmblooded animals. Dogs are considered a potential risk on the transmission due they can mechanically transmit oocysts to man. In this study, a retrospective analysis of toxoplasmic infection in dog serum samples sent to Serviço de Diagnóstico de Zoonoses/FMVZ-UNESP/Botucatu, SP, in the period of 1998 to 2007 was performed. During this period 1097 serum samples were analyzed by the indirect fluorescent antibody test (IFAT), with 299 (27.25%) positive. The most frequent titer was 16 (42.80%), followed by 64 (37.79%). The results indicate that T.gondii is distributed in the environment showing the role of the dog as sentinel animal to toxoplasmosis to monitor public health actions to the control of this zoonosis.
Veterinary Parasitology, 2011
Neosporosis and toxoplasmosis are two important infections in young and adult sheep, leading to l... more Neosporosis and toxoplasmosis are two important infections in young and adult sheep, leading to low production and abortion. This study aimed to determine the frequency of antibodies to Toxoplasma gondii and Neospora caninum in sheep from the eastern region of São Paulo State, Brazil. Serum samples (382) were collected from the sheep and assayed for T. gondii through modified agglutination test (MAT) and indirect fluorescent antibody test (IFAT), and for N. caninum antibodies, through IFAT, with cut-off titers equal to 16 (T. gondii) and 25 (N. caninum). All frozen samples were sent to the Center for Zoonoses Research (NUPEZO), Department of Veterinary Hygiene and Public Health (DHSVP), FMVZ, UNESP, for serological tests. A total of 71/382 (18.6%) samples reacted to T. gondii, especially at titers 16 20.4%). These animals presented infection but no clinical signs. Six and ten animals had high titers for toxoplasmosis and neosporosis. No significant association was observed between antibodies for both parasites (P = 0.535) according to Fisher's exact test, and no correlation was found between T. gondii (MAT) and N. caninum antibody titers (r = −0.0068; P = 0.895), T. gondii (IFAT) and N. caninum antibody titers (r = −0.0025; P = 0.961). Thus, T. gondii and N. caninum infections were observed in farms located in São Paulo State, where sheep play an important economical role for the national and regional business.
IEEE Latin America Transactions, 2011
... São Paulo, SP, 1976. [3] RM Nelms, GB Sheble', SM Newton e LL Grigsby, “Using A Personal... more ... São Paulo, SP, 1976. [3] RM Nelms, GB Sheble', SM Newton e LL Grigsby, “Using A Personal Computer To Teach Power System Transients”, IEEE Transactions on Power Systems, Vol. 4, No. 3, August 1989. [4] S. Kurokawa ...
Revista da Sociedade Brasileira de Medicina Tropical, 2014
Introduction Leishmaniasis and toxoplasmosis are important to public health. Methods Antibodies f... more Introduction Leishmaniasis and toxoplasmosis are important to public health. Methods Antibodies for Toxoplasma gondii and Leishmania spp. were evaluated in cats from Campo Grande, State of Mato Grosso do Sul, Brazil, a region endemic for canine visceral leishmaniasis. Serum samples from 50 asymptomatic cats were titrated for T. gondii by the immunofluorescence antibody test and modified agglutination test and for Leishmania spp. by the immunofluorescence antibody test. Results These two agents coinfected two (4%) of the 50 tested animals. Conclusions These findings demonstrate the concomitant presence of two important zoonoses in cats from Brazilian endemic regions for canine visceral leishmaniasis.
Veterinary parasitology, Jan 10, 2011
Pigeons (Columba livia) cohabit with humans in urban and rural areas, representing a public healt... more Pigeons (Columba livia) cohabit with humans in urban and rural areas, representing a public health problem since microorganisms are transmitted through the inhalation of dust from their dry feces (chlamydiosis) and through ingestion of their undercooked or poorly refrigerated meat (toxoplasmosis). This study aimed to evaluate the presence of Chlamydophila psittaci and Toxoplasma gondii in pigeons from four cities in São Paulo State, Brazil. C. psittaci was evaluated through hemi-nested polymerase chain reaction (hnPCR) using cloacal and tracheal swabs, whereas T. gondii specific antibodies were assessed by means of modified agglutination test (MAT), mouse brain and muscle bioassay, and polymerase chain reaction (PCR). To confirm the infection in mice, T. gondii antibodies were assayed by using indirect fluorescent antibody test (IFAT). Considering C. psittaci, 40/238 (16.8%; 95%CI 12.6-22.1%) samples were positive according to hnPCR, especially for the cities of São Paulo (42.5%) an...
Archives of Veterinary Science, 2013
The parasite Neospora caninum affects mainly cattle and dogs. This study aimed to evaluate the ef... more The parasite Neospora caninum affects mainly cattle and dogs. This study aimed to evaluate the effect of phytohaemagglutinin (PHE) in antigen production of N. caninum NC-1 strain in gerbils (Meriones unguiculatus) and in vitro. 20 gerbils were used, 10 inoculated intraperitoneally with 1 x 106 tachyzoites and 10 with 1 x 106 tachyzoites plus 300 µL/mL of PHE. 16 bottles of Vero cell culture were inoculated, 8 with 1.5 x 105 tachyzoites and 8 with 1.5 x 105 tachyzoites plus 30 µL/mL of PHE. Serology of gerbils was performed on day 0 and before euthanasia. Tachyzoites present in peritoneal fluid and cell culture bottles were quantified by Neubauer chamber and by real-time PCR (qPCR). PHE has not interfered in the production of tachyzoites of N. caninum in intraperitoneal inoculated gerbils and the effect of PHE in cell culture had a negative impact, considering the qPCR technique as the gold standard.
Veterinary Parasitology, 2008
Armadillos are primitive mammals used as food, mostly in rural areas. These animals may be source... more Armadillos are primitive mammals used as food, mostly in rural areas. These animals may be sources of toxoplasmosis and leptospirosis infection for humans, but there is little information about their potential risk as reservoirs. In order to determine the prevalence of armadillos infected by Toxoplasma gondii and Leptospira spp., serum samples of 31 nine-banded armadillos (Dasypus novemcinctus), three six-banded armadillos (Euphractus sexcinctus), two naked-tailed armadillos (Cabassous tatouay) and two long-nosed armadillos (D. hybridus), captured in the mid-west region of the state of São Paulo, were analyzed for leptospirosis using the Microscopic Agglutination Test (MAT-l), and for toxoplasmosis using the Modified Agglutination Test (MAT-t). Only 4/31 (12.90%) nine-banded armadillos were positive for T. gondii, while 3/31 (9.68%) nine-banded armadillos and 1/ 3 (33.33%) six-banded armadillos presented antibodies to Leptospira spp., demonstrating the potential risk of T. gondii and Leptospira spp. transmission to humans, mainly due the habit of eating the meat of these animals in rural areas. #
Pesquisa Veterinária Brasileira, 2010
RESUMO.-[Fatores de risco e presença de anticorpos para Toxoplasma gondii em cães do litoral do E... more RESUMO.-[Fatores de risco e presença de anticorpos para Toxoplasma gondii em cães do litoral do Estado de São Paulo.] A toxoplasmose é causada por um protozoário parasita intracelular obrigatório, Toxoplasma gondii, e acomete vertebrados homeotérmicos incluindo animais de companhia e o homem. O cão apresenta importância epidemiológica por atuar como sentinela da infecção para o homem. O presente estudo objetivou determinar a ocorrência de anticorpos para T. gondii em 205 amostras de soro de cães do município de Ubatuba, SP, Brasil, pela reação de imunofluorescência indireta (RIFI), assim como os fatores de risco relacionados à infecção nos animais, como raça, idade, sexo, acesso a rua, ingestão de comida caseira, acesso a água não tratada e presença de roedores. 52/205 (25,4%) amostras foram positivas para toxoplasmose, com títulos variando de 16 a 256. Os resultados sorológicos apresentaram associação significativa (P<0,05) com consumo de comida caseira (45/118; 38,1%; IC95% 29,9%-47,2%) (OR=7,0; CI95% 3,0-16,6), ABSTRACT.-Da Silva R.C., Lima V.Y., Tanaka E.M., Da Silva A.V., Souza L.C. & Langoni H. 2010. Risk factors and presence of antibodies to Toxoplasma gondii in dogs from the coast of São Paulo State, Brazil. Pesquisa Veterinária Brasileira 30 :161-166. Toxoplasmosis is caused by the obligate intracellular protozoan parasite Toxoplasma gondii and affects warm-blooded vertebrates, including pets and man. Dogs are epidemiologically important since they act as sentinels for the infection in humans. The present study aimed to determine the presence of antibodies to T. gondii in 205 serum samples from dogs in Ubatuba, Sao Paulo state, Brazil, through indirect immunofluorescence reaction (IFAT), as well as the risk factors related to toxoplasmosis in the animals such as breed, age, sex, access to outdoors, homemade food ingestion, access to untreated water, and contact with rodents. Toxoplasmosis-positive samples accounted for 52/205 (25.4%), with titers ranging from 16 to 256. The serological results presented significant association (P<0.05) with homemade food ingestion (45/118; 38.1%; CI95% 29.9%-47.2%) (OR=7.0; CI95% 3.0-16.6), and with access to outdoors where those that do not have access to the street were prevalent (37/121; 30.6%; CI95% 23.1%-39.3%) (OR=0.5; CI95% 0.2-1.0). These results show that toxoplasmosis in this region is related to problems of sanitary education, mainly concerning the appropriate cooking of foods, since most positive animals did not show significant association with the presence of rodents or untreated water consumption but showed, instead association with ingestion of homemade food. Thus, toxoplasmosis is a public health problem in the studied region, and sanitary measures are needed to control the infection due to the strict relationship between man and dog and the presented risk factors.
Journal of Solid State Electrochemistry, 2009
Iron oxide layers were obtained by electrodeposition method on Cu substrates. The electrolyte con... more Iron oxide layers were obtained by electrodeposition method on Cu substrates. The electrolyte containing Fe 2 (SO 4 ) 3 , NaOH, and Triethanolamine was stirred at a temperature of 65°C and the depositions were performed potentiostatically in a conventional three electrode cell at a potential of −1.1 V vs SCE. Parallel magnetoresistance values of −6.2% at 3 kOe were obtained for measurements at room temperature. The magnetoresistive curves showed reduced hysteresis loop, temporal stability, and no saturation for the maximum applied magnetic field. Our results show that for the case of the granular magnetite that we grow, the AMR has opposite sign of that of 3d magnetic alloys. Allied to high values of resistivity, these properties are potentially adequate for the development of magnetic devices such as field sensors. Additional characterization was obtained by using scanning electron microscopy and vibrating sample magnetometry. J Solid State Electrochem
Journal of Insect Physiology, 2011
Colloid and Polymer Science, 2005
Thermosensitive polymers have been the subject of many recent investigations owing to their poten... more Thermosensitive polymers have been the subject of many recent investigations owing to their potential utilization as drug delivery systems [1]. In particular, poly(N-isopropylacrylamide) (PNIPAM) and N-substi-tuted polyacrylamides are potential candidates for this purpose because they exhibit a lower critical solution temperature (LCST) type of behavior [2]. These polymers are soluble (below the LCST, which is ca. 32°C for aqueous solutions of PNIPAM [3]) mainly due to hydrogen bonding between the water molecules and the
Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2010
Revista Brasileira de Parasitologia Veterinária, 2015
Neosporosis is an emergent disease responsible for considerable economic impact due to reproducti... more Neosporosis is an emergent disease responsible for considerable economic impact due to reproductive losses. Its zoonotic potential remains unknown. This study involved a survey of antibodies to Neospora caninum in slaughtered sheep and their association with epidemiological variables. Serum samples from 596 sheep from the states of São Paulo and Rio Grande do Sul, Brazil, were collected in two slaughterhouses located in São Paulo and evaluated by indirect fluorescence antibody test (IFAT), using cut-off titers of 25. Among these samples, 353/596 (59.23%; 95%CI 55.23-63.10) were positive and 263/353 (74.50%; 95%CI 69.71-78.77%) were from Rio Grande do Sul. Statistical associations were determined in the univariate analysis between the serological results and sex, breed and municipality of origin. Sheep that came from extensive breeding system showed higher chance (OR=2.09) of presenting antibodies to N. caninum in relation to those from semi-intensive system. Higher chance was also observed for the different studied breeds, except Bergamácia, in relation to Hampshire Down. The results revealed the presence of infection by N. caninum in sheep from slaughterhouses.
Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária, 2008
Toxoplasmosis is a worldwide zoonosis caused by Toxoplasma gondii and its definitive host is the ... more Toxoplasmosis is a worldwide zoonosis caused by Toxoplasma gondii and its definitive host is the domestic and wild felids infecting human beings and other warmblooded animals. Dogs are considered a potential risk on the transmission due they can mechanically transmit oocysts to man. In this study, a retrospective analysis of toxoplasmic infection in dog serum samples sent to Serviço de Diagnóstico de Zoonoses/FMVZ-UNESP/Botucatu, SP, in the period of 1998 to 2007 was performed. During this period 1097 serum samples were analyzed by the indirect fluorescent antibody test (IFAT), with 299 (27.25%) positive. The most frequent titer was 16 (42.80%), followed by 64 (37.79%). The results indicate that T.gondii is distributed in the environment showing the role of the dog as sentinel animal to toxoplasmosis to monitor public health actions to the control of this zoonosis.
Veterinary Parasitology, 2011
Neosporosis and toxoplasmosis are two important infections in young and adult sheep, leading to l... more Neosporosis and toxoplasmosis are two important infections in young and adult sheep, leading to low production and abortion. This study aimed to determine the frequency of antibodies to Toxoplasma gondii and Neospora caninum in sheep from the eastern region of São Paulo State, Brazil. Serum samples (382) were collected from the sheep and assayed for T. gondii through modified agglutination test (MAT) and indirect fluorescent antibody test (IFAT), and for N. caninum antibodies, through IFAT, with cut-off titers equal to 16 (T. gondii) and 25 (N. caninum). All frozen samples were sent to the Center for Zoonoses Research (NUPEZO), Department of Veterinary Hygiene and Public Health (DHSVP), FMVZ, UNESP, for serological tests. A total of 71/382 (18.6%) samples reacted to T. gondii, especially at titers 16 20.4%). These animals presented infection but no clinical signs. Six and ten animals had high titers for toxoplasmosis and neosporosis. No significant association was observed between antibodies for both parasites (P = 0.535) according to Fisher's exact test, and no correlation was found between T. gondii (MAT) and N. caninum antibody titers (r = −0.0068; P = 0.895), T. gondii (IFAT) and N. caninum antibody titers (r = −0.0025; P = 0.961). Thus, T. gondii and N. caninum infections were observed in farms located in São Paulo State, where sheep play an important economical role for the national and regional business.
IEEE Latin America Transactions, 2011
... São Paulo, SP, 1976. [3] RM Nelms, GB Sheble', SM Newton e LL Grigsby, “Using A Personal... more ... São Paulo, SP, 1976. [3] RM Nelms, GB Sheble', SM Newton e LL Grigsby, “Using A Personal Computer To Teach Power System Transients”, IEEE Transactions on Power Systems, Vol. 4, No. 3, August 1989. [4] S. Kurokawa ...
Revista da Sociedade Brasileira de Medicina Tropical, 2014
Introduction Leishmaniasis and toxoplasmosis are important to public health. Methods Antibodies f... more Introduction Leishmaniasis and toxoplasmosis are important to public health. Methods Antibodies for Toxoplasma gondii and Leishmania spp. were evaluated in cats from Campo Grande, State of Mato Grosso do Sul, Brazil, a region endemic for canine visceral leishmaniasis. Serum samples from 50 asymptomatic cats were titrated for T. gondii by the immunofluorescence antibody test and modified agglutination test and for Leishmania spp. by the immunofluorescence antibody test. Results These two agents coinfected two (4%) of the 50 tested animals. Conclusions These findings demonstrate the concomitant presence of two important zoonoses in cats from Brazilian endemic regions for canine visceral leishmaniasis.
Veterinary parasitology, Jan 10, 2011
Pigeons (Columba livia) cohabit with humans in urban and rural areas, representing a public healt... more Pigeons (Columba livia) cohabit with humans in urban and rural areas, representing a public health problem since microorganisms are transmitted through the inhalation of dust from their dry feces (chlamydiosis) and through ingestion of their undercooked or poorly refrigerated meat (toxoplasmosis). This study aimed to evaluate the presence of Chlamydophila psittaci and Toxoplasma gondii in pigeons from four cities in São Paulo State, Brazil. C. psittaci was evaluated through hemi-nested polymerase chain reaction (hnPCR) using cloacal and tracheal swabs, whereas T. gondii specific antibodies were assessed by means of modified agglutination test (MAT), mouse brain and muscle bioassay, and polymerase chain reaction (PCR). To confirm the infection in mice, T. gondii antibodies were assayed by using indirect fluorescent antibody test (IFAT). Considering C. psittaci, 40/238 (16.8%; 95%CI 12.6-22.1%) samples were positive according to hnPCR, especially for the cities of São Paulo (42.5%) an...
Archives of Veterinary Science, 2013
The parasite Neospora caninum affects mainly cattle and dogs. This study aimed to evaluate the ef... more The parasite Neospora caninum affects mainly cattle and dogs. This study aimed to evaluate the effect of phytohaemagglutinin (PHE) in antigen production of N. caninum NC-1 strain in gerbils (Meriones unguiculatus) and in vitro. 20 gerbils were used, 10 inoculated intraperitoneally with 1 x 106 tachyzoites and 10 with 1 x 106 tachyzoites plus 300 µL/mL of PHE. 16 bottles of Vero cell culture were inoculated, 8 with 1.5 x 105 tachyzoites and 8 with 1.5 x 105 tachyzoites plus 30 µL/mL of PHE. Serology of gerbils was performed on day 0 and before euthanasia. Tachyzoites present in peritoneal fluid and cell culture bottles were quantified by Neubauer chamber and by real-time PCR (qPCR). PHE has not interfered in the production of tachyzoites of N. caninum in intraperitoneal inoculated gerbils and the effect of PHE in cell culture had a negative impact, considering the qPCR technique as the gold standard.
Veterinary Parasitology, 2008
Armadillos are primitive mammals used as food, mostly in rural areas. These animals may be source... more Armadillos are primitive mammals used as food, mostly in rural areas. These animals may be sources of toxoplasmosis and leptospirosis infection for humans, but there is little information about their potential risk as reservoirs. In order to determine the prevalence of armadillos infected by Toxoplasma gondii and Leptospira spp., serum samples of 31 nine-banded armadillos (Dasypus novemcinctus), three six-banded armadillos (Euphractus sexcinctus), two naked-tailed armadillos (Cabassous tatouay) and two long-nosed armadillos (D. hybridus), captured in the mid-west region of the state of São Paulo, were analyzed for leptospirosis using the Microscopic Agglutination Test (MAT-l), and for toxoplasmosis using the Modified Agglutination Test (MAT-t). Only 4/31 (12.90%) nine-banded armadillos were positive for T. gondii, while 3/31 (9.68%) nine-banded armadillos and 1/ 3 (33.33%) six-banded armadillos presented antibodies to Leptospira spp., demonstrating the potential risk of T. gondii and Leptospira spp. transmission to humans, mainly due the habit of eating the meat of these animals in rural areas. #
Pesquisa Veterinária Brasileira, 2010
RESUMO.-[Fatores de risco e presença de anticorpos para Toxoplasma gondii em cães do litoral do E... more RESUMO.-[Fatores de risco e presença de anticorpos para Toxoplasma gondii em cães do litoral do Estado de São Paulo.] A toxoplasmose é causada por um protozoário parasita intracelular obrigatório, Toxoplasma gondii, e acomete vertebrados homeotérmicos incluindo animais de companhia e o homem. O cão apresenta importância epidemiológica por atuar como sentinela da infecção para o homem. O presente estudo objetivou determinar a ocorrência de anticorpos para T. gondii em 205 amostras de soro de cães do município de Ubatuba, SP, Brasil, pela reação de imunofluorescência indireta (RIFI), assim como os fatores de risco relacionados à infecção nos animais, como raça, idade, sexo, acesso a rua, ingestão de comida caseira, acesso a água não tratada e presença de roedores. 52/205 (25,4%) amostras foram positivas para toxoplasmose, com títulos variando de 16 a 256. Os resultados sorológicos apresentaram associação significativa (P<0,05) com consumo de comida caseira (45/118; 38,1%; IC95% 29,9%-47,2%) (OR=7,0; CI95% 3,0-16,6), ABSTRACT.-Da Silva R.C., Lima V.Y., Tanaka E.M., Da Silva A.V., Souza L.C. & Langoni H. 2010. Risk factors and presence of antibodies to Toxoplasma gondii in dogs from the coast of São Paulo State, Brazil. Pesquisa Veterinária Brasileira 30 :161-166. Toxoplasmosis is caused by the obligate intracellular protozoan parasite Toxoplasma gondii and affects warm-blooded vertebrates, including pets and man. Dogs are epidemiologically important since they act as sentinels for the infection in humans. The present study aimed to determine the presence of antibodies to T. gondii in 205 serum samples from dogs in Ubatuba, Sao Paulo state, Brazil, through indirect immunofluorescence reaction (IFAT), as well as the risk factors related to toxoplasmosis in the animals such as breed, age, sex, access to outdoors, homemade food ingestion, access to untreated water, and contact with rodents. Toxoplasmosis-positive samples accounted for 52/205 (25.4%), with titers ranging from 16 to 256. The serological results presented significant association (P<0.05) with homemade food ingestion (45/118; 38.1%; CI95% 29.9%-47.2%) (OR=7.0; CI95% 3.0-16.6), and with access to outdoors where those that do not have access to the street were prevalent (37/121; 30.6%; CI95% 23.1%-39.3%) (OR=0.5; CI95% 0.2-1.0). These results show that toxoplasmosis in this region is related to problems of sanitary education, mainly concerning the appropriate cooking of foods, since most positive animals did not show significant association with the presence of rodents or untreated water consumption but showed, instead association with ingestion of homemade food. Thus, toxoplasmosis is a public health problem in the studied region, and sanitary measures are needed to control the infection due to the strict relationship between man and dog and the presented risk factors.
Journal of Solid State Electrochemistry, 2009
Iron oxide layers were obtained by electrodeposition method on Cu substrates. The electrolyte con... more Iron oxide layers were obtained by electrodeposition method on Cu substrates. The electrolyte containing Fe 2 (SO 4 ) 3 , NaOH, and Triethanolamine was stirred at a temperature of 65°C and the depositions were performed potentiostatically in a conventional three electrode cell at a potential of −1.1 V vs SCE. Parallel magnetoresistance values of −6.2% at 3 kOe were obtained for measurements at room temperature. The magnetoresistive curves showed reduced hysteresis loop, temporal stability, and no saturation for the maximum applied magnetic field. Our results show that for the case of the granular magnetite that we grow, the AMR has opposite sign of that of 3d magnetic alloys. Allied to high values of resistivity, these properties are potentially adequate for the development of magnetic devices such as field sensors. Additional characterization was obtained by using scanning electron microscopy and vibrating sample magnetometry. J Solid State Electrochem
Journal of Insect Physiology, 2011
Colloid and Polymer Science, 2005
Thermosensitive polymers have been the subject of many recent investigations owing to their poten... more Thermosensitive polymers have been the subject of many recent investigations owing to their potential utilization as drug delivery systems [1]. In particular, poly(N-isopropylacrylamide) (PNIPAM) and N-substi-tuted polyacrylamides are potential candidates for this purpose because they exhibit a lower critical solution temperature (LCST) type of behavior [2]. These polymers are soluble (below the LCST, which is ca. 32°C for aqueous solutions of PNIPAM [3]) mainly due to hydrogen bonding between the water molecules and the
Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2010