16 results on '"intoxication symptoms"'
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2. Motor vehicle collisions caused by the 'super-strength' synthetic cannabinoids, MAM-2201, 5F-PB-22, 5F-AB-PINACA, 5F-AMB and 5F-ADB in Japan experienced from 2012 to 2014.
- Author
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Kaneko, Shuji
- Abstract
From 2012 to 2014 in Japan, 214 cases of motor vehicle collisions were attributed to the use of illegal drugs. In 93 out of 96 investigated cases, the causative agents were a variety of synthetic cannabinoids (SCs). These SCs can be classified into three groups according to the lineage of the chemical structures: (1) naphthoyl indoles, such as MAM-2201, (2) quinolinyl ester indoles, such as 5F-PB-22, and (3) indazole carboxamides, such as 5F-AB-PINACA, 5F-AMB, and 5F-ADB. These SCs became available sequentially with increasing cannabinoid CB agonist potencies and reached a nationwide outbreak in the summer of 2014. They caused acute intoxication with impaired consciousness, anterograde amnesia (impaired memory), catalepsy with muscle rigidity, tachycardia, and vomiting or drooling soon after smoking. Drivers who had abused one of these SCs might unexpectedly experience the acute intoxication that caused uncontrolled driving. These SCs were generally difficult to detect from body fluid samples. It is thought that the highly lipophilic SCs disappear from the blood via rapid degradation by liver enzymes and selective accumulation into adipose tissues. Thus, much effort should be directed to the development of fast and sensitive chemical detection of the drug usage. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
3. Subclinical Symptoms of Intoxication Associated with Exposure to Low Levels of Mercury by Dentists
- Author
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E. Ghaderi, J. Hassan Zadeh, A. Choobineh, and M. Neghab
- Subjects
Dentists ,Amalgam filling ,Occupational exposure ,Mercury ,Intoxication symptoms ,Medicine - Abstract
Background and aims Dentists are occupationally exposed to elemental mercury from placements of mercury-containing amalgam. Although many studies have been conducted on mercury intoxication, there is still widespread concern about possible ill effects of chronic low-level mercury exposure on dentists. The present study examined the effects of occupational exposure to low levels of mercury by a group of dentists. Methods In this historical cohort study, subjects consisted of 106 dentists and 94 general practitioners (referent group), from private and public clinics in Shiraz city. Subjects were requested to complete a questionnaire on demographic variables, symptoms experienced and work practices. Additionally, using standard methods, atmospheric and urinary concentrations of mercury were measured. The data were analyzed by appropriate statistical tests. In univariat analysis, Chi-Square test was used to compare the prevalence of symptoms among both groups. Independent sample t-test and Mann-Whitney’s U-test were used to compare the mean and median of quantitative data of both groups. Multivariate logistic regression analysis was used to adjust for potential confounders. Results Both groups were similar as far as most demographic and socioeconomic variables, but age and number of personal amalgam fillings, were concerned. Median of atmospheric concentration of mercury was found to be 3.35 μg/m3. Likewise, the urinary concentration of mercury in dentists was estimated to be 3.22 μg /g.creatinine. This value was significantly higher than that of the referent group. Additionally, analysis of the data revealed that subclinical symptoms of intoxication were more prevalent in dentists. Conclusion Our findings indicate that occupational exposure to mercury by dentists, even at low levels, is associated with a significant increase in the prevalence of subclinical symptoms of intoxication.
- Published
- 2011
4. Toxic response of occupational exposure to ethylene oxide, with particular reference to its respiratory effects
- Author
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E. Soleimani and M. Neghab
- Subjects
Ethylene oxide ,occupational exposure ,respiratory disorders ,intoxication symptoms ,Medicine - Abstract
Background and Aims Ethylene oxide is used as a sterilizing agent in health care industries. The present study aimed to assess and recognize the nature of pulmonary reactions, if any, associated with occupational exposure to ethylene oxide and to investigate the prevalence of dermal, visual, neurologic, reproductive, hematologic, hepatic and renal disorders . Methods Forty exposed and 47 unexposed employees were evaluated . Subjects were interviewed and standard respiratory symptom questionnaire as well as a questionnaire pertaining to symptoms of intoxication with this chemical were administered to them. Furthermore, parameters of pulmonary function were measured during exposure and a few days after exposure ceased Additionally, blood samples were taken for CBC, liver and kidney function tests . Moreover, atmospheric concentrations of ethylene oxide were determined by gas detector tubes . Results Respiratory symptoms such as cough and phlegm as well as dermal, visual and neurologic symptoms in exposed workers were significantly more prevalent P≤0.05 . Furthermore, significant decrements in some parameters of pulmonary function during exposure as compared with the values measured after exposure ceased, were noted . Results of biochemical tests were similar in both groups. Mean atmospheric concentration of ethylene oxide was evaluated to be 1.24±1.5 ppm. Conclusion The findings of this study indicate that exposure to ethylene oxide even at low concentrations is associated with significant decreases in pulmonary parameters. However, this effect is acute, temporary and reversible. Conversely, exposure to ethylene oxide was not associated with hematotoxic, hepatotoxic and nephrotoxic response, although, dermal, visual and neurologic symptoms were observed.
- Published
- 2011
5. LC50 determination and intoxication symptoms of a new pyridine carboxamide pesticide Flonicamid on common carp Cyprinus carpio
- Author
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Amalia Perez Jimenez, Ali Taheri Mirghaed, and Melika Ghelichpour
- Subjects
lethal concentration ,Veterinary medicine ,biology ,Flonicamid ,medicine.drug_class ,behavior ,lcsh:S ,Carboxamide ,General Medicine ,Pesticide ,intoxication symptoms ,biology.organism_classification ,Cyprinus ,Fight-or-flight response ,lcsh:Agriculture ,Common carp ,Lethargy ,Cyprinus carpio ,Toxicity ,medicine ,Juvenile - Abstract
The present study was undertaken to evaluate the lethal toxicity and stress signs of Flonicamid toward juvenile common carp ( Cyprinus carpio ). The 96 h LC50 values, determined 43.17 mgL-1 by probit analysis in a semi-static system. LC50 24, 48 and 72 h were 47.54, 41.83 and 43.51 mgL-1, respectively. Behavioral changes include hyperexcitement, erratic swimming, dark coloration, loss of equilibrium and lethargy were observed with different intensities. Consequently, mortality rate, stress signs and behavioral changes observed in response to the Flonicamid are dependent to dose and time exposure.
- Published
- 2019
6. Avaliação da seletividade da mistura de oxyfluorfen e ametryne, aplicada em pré ou pós-emergência, a dez variedades de cana-deaçúcar (cana-planta) Selectivity of oxyfluorfen and ametryn in sugarcane varieties
- Author
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Edivaldo D. Velini, Dagoberto Martins, Luiz A. Manoel, Shizuo Matsuoka, José C. Travain, and José C. Carvalho
- Subjects
Sintomas de intoxicação ,herbicida ,Intoxication symptoms ,herbicide ,Biology (General) ,QH301-705.5 ,Botany ,QK1-989 - Abstract
O objetivo deste trabalho foi o de avaliar a seletividade da mistura de oxyfluorfen e ametryne, a dez cultivares de cana-de-açúcar. Utilizou-se as doses de 0,48 e 1,5 kg de i.a. / ha (2,0 e 3,0 l de p.c./ha), respectivamente. As cultivares utilizadas foram: RB 83-5089, RB 80-6043, RB 78-5148, RB 82-5336, RB 83-5486, RB 72-454, SP 79- 1011, SP 70-1143, SP 71-1406 e SP 80-1842. Os herbicidas, em mistura de tanque, foram aplicados em pré ou pós-emergência (5 e 29 dias após o plantio, respectivamente). As testemunhas de cada variedade foram capinadas manualmente. O plantio foi feito nos dias 24 e 25 /03/94. Nas parcelas com aplicação em préemergência verificou-se sintomas de intoxicação (avermelhamento e necrose) em 4,72% (RB 83-5089) a 14,58% (RB 82-5336) da área foliar da cultura; em pós-emergência os sintomas alcançaram entre 20,16% (SP 71-1406) e 45,44% (80-1842) da área foliar da cana. Com o crescimento da planta (a partir da oitava folha definitiva), as novas folhas emitidas não apresentaram sintomas de intoxicação. Não foram verificados efeitos dos herbicidas sobre o crescimento (emissão de folhas e altura das plantas), perfilhamento, produtividade e características tecnológicas dos colmos obtidos.The objective of this research was the evaluation of the selectivity of the herbicides oxyfluorfen and ametryn, in tank mixture, to ten sugarcane varieties. It were used the rates of 0.48 and 1.5 kg a.i. / ha, respectively. Herbicides were applied in pre or post-emergence (5 or 29 days after planting). Checks were hand-weeded. It were used the varieties RB 83-5089, RB 80-6043, RB 78-5148, RB 82-5336, RB 83-5486, RB 72- 454, SP 79-1011, SP 70-1143, SP 71-1406 e SP 80-1842. Sugarcane was planted in 03/24th and 25th /1994. In pre-emergence plots, intoxication symptoms (spots with brown color or dead tissues) were observed in 4,72% (RB 83- 5089) to 14,58% (RB 82-5336) of the leaf area. In post-emergence plots, symptoms were observed in 20,16% (SP 71-1406) to 45,44% (80-1842) of the total leaf area. As plant grew, intoxication became weaker. New leaves, after the eighth one, showed no symptoms. The herbicides did not affect sugarcane growth (number of leaves, tillering and plant height), the yield and the quality of the culms.
- Published
- 2000
- Full Text
- View/download PDF
7. Toxic responses of different organs following occupational exposure of employees of a plant to ethylene oxide.
- Author
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Neghab, Masoud, Soleimani, Esmaeel, and Hassanzadeh, J.
- Subjects
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ETHYLENE oxide , *INDUSTRIAL hygiene , *GAS detectors , *NEPHROTOXICOLOGY , *RESPIRATORY diseases , *SYMPTOMS , *SYRINGES - Abstract
This study was carried out to assess possible toxic response(s) associated with occupational exposure to ethylene oxide (EO) in a local plant, producing disposable syringes, where the chemical was used as a sterilant. A total of 40 exposed and 47 unexposed employees were interviewed and standard respiratory symptom questionnaire as well as a questionnaire pertaining to symptoms of intoxication with EO was administered to them. Furthermore, atmospheric concentration of EO was measured by grab sampling using gas detector tubes. Additionally, parameters of pulmonary function were measured and blood chemistry test was performed. Average atmospheric concentration of EO was calculated to be 2.2 mgm−3 (1.24 ppm). Respiratory, dermal, visual, and neurologic symptoms in exposed workers were significantly more prevalent and reversible decrements were noted in some parameters of their pulmonary function. Conversely, results of biochemical tests were similar in both groups. Our findings indicate that exposure to EO results in significant decreases in some parameters of pulmonary function. However, this effect is acute, temporary, and reversible. Additionally, hematotoxic, hepatotoxic, and nephrotoxic outcomes were not evident, although, dermal, visual, and neurologic symptoms were observed. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
8. Subclinical symptoms of intoxication associated with exposure to low levels of mercury by dentists.
- Author
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Neghab, M., Choobineh, A. R., Hasan- Zadeh, J., and Ghaderi, E.
- Subjects
- *
ALCOHOLISM , *PHYSIOLOGICAL effects of mercury , *HEALTH of dentists , *GENERAL practitioners , *QUESTIONNAIRES , *UNIVARIATE analysis , *CHI-squared test - Abstract
Background and aim: Dentists are occupationally exposed to elemental mercury from placements of mercury-containing amalgam. Although many studies have been conducted on mercury intoxication, there is still widespread concern about possible ill effects of chronic low-level mercury exposure on dentists. The present study examined the effects of occupational exposure to low levels of mercury by a group of dentists. Method: In this historical cohort study, subjects consisted of 106 dentists and 94 general practitioners (referent group), from private and public clinics in Shiraz city. Subjects were requested to complete a questionnaire on demographic variables, symptoms experienced and work practices. Additionally, using standard methods, atmospheric and urinary concentrations of mercury were measured. The data were analyzed by appropriate statistical tests. In univariate analysis, Chi-Square test was used to compare the prevalence of symptoms among both groups. Independent sample t-test and Mann-Whitney's U-test were used to compare the mean and median of quantitative data of both groups. Multivariate logistic regression analysis was used to adjust for potential confounders. Results: Both groups were similar as far as most demographic and socioeconomic variables, but age and number of personal amalgam fillings, were concerned. Median of atmospheric concentration of mercury was found to be 3.35 μg/m³. Likewise, the urinary concentration of mercury in dentists was estimated to be 3.22 μg /g.creatinine. This value was significantly higher than that of the referent group. Additionally, analysis of the data revealed that subclinical symptoms of intoxication were more prevalent in dentists. Conclusions: Our findings indicate that occupational exposure to mercury by dentists, even at low levels, is associated with a significant increase in the prevalence of subclinical symptoms of intoxication. [ABSTRACT FROM AUTHOR]
- Published
- 2011
9. Symptoms of Intoxication in Dentists Associated with Exposure to Low Levels of Mercury.
- Author
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Neghab, Masoud, Choobineh, Alireza, Zadeh, Jafar Hassan, and Ghaderi, Ebrahim
- Abstract
The article discusses the risk of toxicity in the dentists exposed to low levels of mercury. According to the authors questionnaires were used to collect data relating demography and work practices from the dentists across Shiraz, Iran and concentration of mercury was measured by Atomic Absorption Spectroscopy technique. According to the results risk level is high for the dentists in the mercury exposed working area.
- Published
- 2011
- Full Text
- View/download PDF
10. Biogenic amines in dairy products
- Author
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Ladero Losada, Víctor Manuel, Linares, Daniel M., Río Lagar, Beatriz del, García Suárez, María Pilar, Fernández García, María, Álvarez González, Miguel Ángel, Ladero Losada, Víctor Manuel, Río Lagar, Beatriz del, García Suárez, María Pilar, Álvarez González, Miguel Ángel, Ladero Losada, Víctor Manuel [0000-0002-7613-3745], Río Lagar, Beatriz del [0000-0001-8107-1975], García Suárez, María Pilar [0000-0003-1213-8165], and Álvarez González, Miguel Ángel [0000-0001-9607-7480]
- Subjects
β‐phenylethylamine ,Biogenic amines ,Cadaverine ,education ,Putrescine ,Intoxication symptoms ,Tyramine ,Gene expression ,Dairy products ,Histamine - Abstract
Biogenic amines (BAs) are low molecular weight, nitrogenous, basic, organic compounds mainly synthesised via the decarboxylation of amino acids. BAs can be found in many types of food and beverage, albeit in very different concentrations. The most important BAs in dairy products are histamine, tyramine, putrescine, cadaverine and β‐phenylethylamine. This chapter describes the biochemistry of BAs, the micro‐organisms and genes responsible for the production of the main BAs found in dairy products, the toxicity of BAs and the intoxication symptoms associated with their ingestion. A detailed analysis of the factors affecting the accumulation of BAs in dairy products is also reviewed from the perspective of their nature as toxins produced in situ in foods as a result of microbial activities. The pH, temperature and salt concentration have an impact on BAs accumulation since they can influence the growth of BAs‐producing bacteria, their gene expression, and the activity of their enzymes and transporters.
- Published
- 2017
11. Toxic response of occupational exposure to ethylene oxide, with particular reference to its respiratory effects
- Author
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Neghab, M. and Esmaeel Soleimani
- Subjects
respiratory disorders ,lcsh:R ,Ethylene oxide ,lcsh:Medicine ,occupational exposure ,intoxication symptoms - Abstract
Background and Aims Ethylene oxide is used as a sterilizing agent in health care industries. The present study aimed to assess and recognize the nature of pulmonary reactions, if any, associated with occupational exposure to ethylene oxide and to investigate the prevalence of dermal, visual, neurologic, reproductive, hematologic, hepatic and renal disorders . Methods Forty exposed and 47 unexposed employees were evaluated . Subjects were interviewed and standard respiratory symptom questionnaire as well as a questionnaire pertaining to symptoms of intoxication with this chemical were administered to them. Furthermore, parameters of pulmonary function were measured during exposure and a few days after exposure ceased Additionally, blood samples were taken for CBC, liver and kidney function tests . Moreover, atmospheric concentrations of ethylene oxide were determined by gas detector tubes . Results Respiratory symptoms such as cough and phlegm as well as dermal, visual and neurologic symptoms in exposed workers were significantly more prevalent P≤0.05 . Furthermore, significant decrements in some parameters of pulmonary function during exposure as compared with the values measured after exposure ceased, were noted . Results of biochemical tests were similar in both groups. Mean atmospheric concentration of ethylene oxide was evaluated to be 1.24±1.5 ppm. Conclusion The findings of this study indicate that exposure to ethylene oxide even at low concentrations is associated with significant decreases in pulmonary parameters. However, this effect is acute, temporary and reversible. Conversely, exposure to ethylene oxide was not associated with hematotoxic, hepatotoxic and nephrotoxic response, although, dermal, visual and neurologic symptoms were observed.
- Published
- 2011
12. Tolerância de cultivares de cana-de-açúcar a herbicidas aplicados em pós-emergência Tolerance of sugarcane cultivars to herbicides applied in post-emergence
- Author
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Joseane Rodrigues de Souza, Dilermando Perecin, Carlos Alberto Mathias Azania, Ana Regina Schiavetto, Igor Vanzela Pizzo, and Liliam Silvia Candido
- Subjects
Saccharum spp ,seletividade ,selectivity ,sintomas de intoxicação ,phytotoxicity ,intoxication symptoms ,lcsh:Agriculture (General) ,fitotoxicidade ,lcsh:S1-972 - Abstract
O presente trabalho teve por objetivo avaliar a tolerância de cultivares de cana-de-açúcar a herbicidas aplicados em pós-emergência inicial da soqueira. O experimento foi implantado em Ribeirão Preto (SP), no ano agrícola de 2007/2008. O delineamento experimental foi de blocos ao acaso, em esquema de parcelas subdivididas com 36 tratamentos em quatro repetições. Foram utilizadas as cultivares IACSP94-2094, IACSP94-2101, IACSP93-3046, IACSP94-4004, RB72454 e a IAC 86-2480 nas parcelas e os herbicidas, constituídos pela mistura pronta de diurom (1170g ha-1) + hexazinona (330 g ha-1); diurom (1865 g ha-1) + hexazinona (234 g ha-1); metribuzim; tebutiuron; amicarbazona e uma testemunha nas subparcelas. Foram avaliados os sintomas visuais de intoxicação, teor relativo de clorofila, eficiência fotoquímica máxima do fotossistema II, altura, estande, qualidade tecnológica da cana e a produção dos colmos. Concluiu-se que as cultivares IACSP94-2094, IACSP94-2101, IACSP93-3046, IACSP94-4004, RB72454 e IAC86-2480 não foram influenciadas pelos herbicidas, apenas ocorreram diferenças inerentes à própria genética. Observou-se apenas leves sintomas de intoxicação na fase inicial de desenvolvimento e não se constatou nenhum prejuízo ao conteúdo de clorofila, avaliado pelo teor relativo de clorofila. No sistema fotossintético houve pequeno prejuízo na fase inicial, quando avaliado pela eficiência fotoquímica máxima do FS II (Fv/Fm), mas que não foi suficiente para prejudicar a altura, o estande, a produção e a qualidade tecnológica das diferentes cultivares de cana-de-açúcar estudadas.This study aimed to assess the tolerance of cultivars of sugarcane to herbicides applied in post-emergence initial of ratoon. The experiment was carried in Ribeirão Preto, SP, Brazil, in the agricultural year 2007/2008. The experimental design was the randomized blocks, in split-plots, 36 treatments and four replications. It was used the cultivars IACSP94-2094, IACSP94-2101, IACSP93-3046, IACSP94-4004, RB72454 and IAC86-2480 in plots and herbicides, were made by mixture ready to diuron (1170 g ha-1) + hexazinone (330 g ha -1); diuron (1865 g ha-1) + hexazinone (234 g ha-1); metribuzin; tebuthiuron; amicarbazone and a control in the sub-plots. The intoxication symptoms of visual, relative content of chlorophyll and photochemical efficiency of PS II, height, stand, technological quality of sugarcane and production the culms. It was concluded the cultivars IACSP94-2094, IACSP94-2101, IACSP93-3046, IACSP94-4004, RB72454 and IAC86-2480 were not affected by herbicides, only showed differences inherent in the genetics. In all cultivars, there was only mild intoxication symptoms of visual at the initial stage of development and there was not any damage to the content of chlorophyll, measured by relative content chlorophyll. The photosynthetic system showed little damage in the initial phase, when measured by the photochemical efficiency of PS II (Fv/Fm), but that was not enough to constrain the height, stand, production and technology quality of different cultivars of sugarcane studied.
- Published
- 2009
13. Seletividade da soja transgênica tolerante ao glyphosate e eficácia de controle de Commelina benghalensis com herbicidas aplicados isolados e em misturas Selectivity of glyphosate-tolerant soybean and efficiency of Commelina benghalensis control using isolated and mixed herbicides
- Author
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Núbia Maria Correia, Julio Cezar Durigan, and Gilson José Leite
- Subjects
chemical control ,spiderwot ,soja transgênica ,controle químico ,intoxication symptoms ,lcsh:Agriculture (General) ,trapoeraba ,transgenic soybean ,Roundup Ready ,lcsh:S1-972 ,sintomas de fitointoxicação - Abstract
O objetivo do trabalho foi avaliar os possíveis efeitos fitotóxicos de herbicidas aplicados em pós-emergência, isolados e em misturas, na soja transgênica (cv. M-SOY 8008 RR) tolerante ao glyphosate e no controle de plântulas de Commelina benghalensis. Os experimentos foram desenvolvidos no período de janeiro a maio de 2006, em vasos, mantidos em condições de ambiente não controlado, no Departamento de Fitossanidade, UNESP, Campus de Jaboticabal (SP). Os tratamentos avaliados foram: glyphosate (1,20 kg ha-1 e.a.), chlorimuron-ethyl (0,02 kg ha-1), lactofen (0,18 kg ha-1), fomesafen (0,25 kg ha-1), flumioxazin (0,025 kg ha-1), imazethapyr (0,10 kg ha-1), chlorimuron-ethyl (0,01 kg ha-1) mais lactofen (0,096 kg ha-1), chlorimuron-ethyl (0,01 kg ha-1) mais fomesafen (0,125 kg ha-1), lactofen (0,096kg ha-1) mais fomesafen (0,125 kg ha-1), as misturas de glyphosate (0,60kgha-1) com chlorimuron-ethyl (0,01 kg ha-1), lactofen (0,096 kg ha-1), fomesafen (0,125 kg ha-1), flumioxazin (0,0125 kg ha-1), imazethapyr (0,05 kg ha-1) e uma testemunha sem aplicação de herbicida. No experimento com C. benghalensis, testou-se também a aplicação seqüencial de glyphosate (0,96 mais 0,72 kg ha-1 e.a.). A associação de ghyphosate a herbicidas utilizados em soja convencional ocasionou danos visuais às plantas de soja. Em alguns casos, como nas misturas de glyphosate com lactofen e glyphosate com flumioxazin, os sintomas foram severos, com necroses e pontos cloróticos nas folhas. Mesmo assim, essa fitointoxicação não influenciou no desenvolvimento vegetativo e reprodutivo da soja. A mistura de glyphosate a outros herbicidas, assim como a sua aplicação seqüencial, não foram eficazes no controle de C. benghalensis, nas doses testadas e quando as plantas estavam no estádio de 4 a 6 folhas totalmente expandidas.The objective of this study was to evaluate phytotoxicity effects of herbicides applied during post-emergence, either alone or in mixture with other chemicals in transgenic glyphosate-tolerant soybean (cv. M-SOY 8008 RR) and in Commelina benghalensis. Two experiments were carried out from January to May 2006, in pots, under uncontrolled conditions, at Plant Protection Department of UNESP, Jaboticabal (SP), Brazil. The following herbicides were used: glyphosate (1,20 kg a.e. ha-1), chlorimuron-ethyl (0,02 kg ha-1), lactofen (0,018 kg ha-1), fomesafen (0,25kg ha-1), flumioxazin (0,025 kg ha-1), imazethapyr (0,10 kg ha-1), chlorimuron-ethyl (0,01 kg ha-1) plus lactofen (0,096 kg ha-1), chlorimuron-ethyl (0,01 kg ha-1) plus fomesafen (0,125 kg ha-1) and lactofen (0,096 kg ha-1) plus fomesafen (0,125 kg ha-1). It was also used the glyphosate (0,60 kg a.e. ha-1) in mixture with chlorimuron-ethyl (0,01 kg ha-1), lactofen (0,096 kg ha-1), fomesafen (0,125 kg ha-1), flumioxazin (0,0125 kg ha-1) and imazethapyr (0,05 kg ha-1) and a no treated control. Also the sequential application of glyphosate (0,96 plus 0,72 kg a.e. ha-1) was used in the experiment with C. benghalensis. The association of glyphosate and conventional soybean herbicides caused soybean injury. In some cases, such as in the glyphosate-lactofen and glyphosate-flumioxazin mixtures, the symptoms were severe, with necrosis and clorosis. Although there were phytotoxic symptoms in the plant, the herbicide did not affect vegetative and reproductive soybean development. The mixture of glyphosate to other herbicides and its sequential application did not control C. benghalensis, when sprayed in the tested doses and in plants with 4 to 6 expanded leaves.
- Published
- 2008
14. Tolerance of sugarcane cultivars to herbicides applied in post-emergence
- Author
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Liliam Silvia Candido, Igor Vanzela Pizzo, Ana Regina Schiavetto, Dilermando Perecin, Joseane Rodrigues de Souza, Carlos Alberto Mathias Azania, Universidade Estadual Paulista (Unesp), Instituto Agronômico (IAC), and Centro Universitário Moura Lacerda IAC/Centro Cana
- Subjects
Saccharum spp ,seletividade ,Materials Science (miscellaneous) ,selectivity ,phytotoxicity ,Biology ,intoxication symptoms ,Photosynthesis ,Hexazinone ,chemistry.chemical_compound ,Tebuthiuron ,chemistry ,Metribuzin ,Agronomy ,Initial phase ,Chlorophyll ,Phytotoxicity ,sintomas de intoxicação ,Cultivar ,General Agricultural and Biological Sciences ,fitotoxicidade - Abstract
Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:52:35Z No. of bitstreams: 1 S0006-87052009000400014.pdf: 162852 bytes, checksum: fa42bff996e6aca96b37488288287ccc (MD5) Made available in DSpace on 2013-08-22T18:52:35Z (GMT). No. of bitstreams: 1 S0006-87052009000400014.pdf: 162852 bytes, checksum: fa42bff996e6aca96b37488288287ccc (MD5) Previous issue date: 2009-01-01 Made available in DSpace on 2013-09-30T17:51:09Z (GMT). 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No. of bitstreams: 2 S0006-87052009000400014.pdf: 162852 bytes, checksum: fa42bff996e6aca96b37488288287ccc (MD5) S0006-87052009000400014.pdf.txt: 46527 bytes, checksum: ba785b5c8befe93fa45f7a0e5d0a696f (MD5) Previous issue date: 2009-01-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) O presente trabalho teve por objetivo avaliar a tolerância de cultivares de cana-de-açúcar a herbicidas aplicados em pós-emergência inicial da soqueira. O experimento foi implantado em Ribeirão Preto (SP), no ano agrícola de 2007/2008. O delineamento experimental foi de blocos ao acaso, em esquema de parcelas subdivididas com 36 tratamentos em quatro repetições. Foram utilizadas as cultivares IACSP94-2094, IACSP94-2101, IACSP93-3046, IACSP94-4004, RB72454 e a IAC 86-2480 nas parcelas e os herbicidas, constituídos pela mistura pronta de diurom (1170g ha-1) + hexazinona (330 g ha-1); diurom (1865 g ha-1) + hexazinona (234 g ha-1); metribuzim; tebutiuron; amicarbazona e uma testemunha nas subparcelas. Foram avaliados os sintomas visuais de intoxicação, teor relativo de clorofila, eficiência fotoquímica máxima do fotossistema II, altura, estande, qualidade tecnológica da cana e a produção dos colmos. Concluiu-se que as cultivares IACSP94-2094, IACSP94-2101, IACSP93-3046, IACSP94-4004, RB72454 e IAC86-2480 não foram influenciadas pelos herbicidas, apenas ocorreram diferenças inerentes à própria genética. Observou-se apenas leves sintomas de intoxicação na fase inicial de desenvolvimento e não se constatou nenhum prejuízo ao conteúdo de clorofila, avaliado pelo teor relativo de clorofila. No sistema fotossintético houve pequeno prejuízo na fase inicial, quando avaliado pela eficiência fotoquímica máxima do FS II (Fv/Fm), mas que não foi suficiente para prejudicar a altura, o estande, a produção e a qualidade tecnológica das diferentes cultivares de cana-de-açúcar estudadas. This study aimed to assess the tolerance of cultivars of sugarcane to herbicides applied in post-emergence initial of ratoon. The experiment was carried in Ribeirão Preto, SP, Brazil, in the agricultural year 2007/2008. The experimental design was the randomized blocks, in split-plots, 36 treatments and four replications. It was used the cultivars IACSP94-2094, IACSP94-2101, IACSP93-3046, IACSP94-4004, RB72454 and IAC86-2480 in plots and herbicides, were made by mixture ready to diuron (1170 g ha-1) + hexazinone (330 g ha -1); diuron (1865 g ha-1) + hexazinone (234 g ha-1); metribuzin; tebuthiuron; amicarbazone and a control in the sub-plots. The intoxication symptoms of visual, relative content of chlorophyll and photochemical efficiency of PS II, height, stand, technological quality of sugarcane and production the culms. It was concluded the cultivars IACSP94-2094, IACSP94-2101, IACSP93-3046, IACSP94-4004, RB72454 and IAC86-2480 were not affected by herbicides, only showed differences inherent in the genetics. In all cultivars, there was only mild intoxication symptoms of visual at the initial stage of development and there was not any damage to the content of chlorophyll, measured by relative content chlorophyll. The photosynthetic system showed little damage in the initial phase, when measured by the photochemical efficiency of PS II (Fv/Fm), but that was not enough to constrain the height, stand, production and technology quality of different cultivars of sugarcane studied. Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Programa de Genética e Melhoramento de Plantas Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Departamento de Ciências Exatas Instituto Agronômico Centro de Cana Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Centro Universitário Moura Lacerda IAC/Centro Cana Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Programa de Genética e Melhoramento de Plantas Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Departamento de Ciências Exatas Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias
- Published
- 2009
15. Selectivity of glyphosate-tolerant soybean and efficiency of Commelina benghalensis control using isolated and mixed herbicides
- Author
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Julio Cezar Durigan, Gilson José Leite, Núbia Maria Correia, and Universidade Estadual Paulista (Unesp)
- Subjects
spiderwot ,biology ,Materials Science (miscellaneous) ,intoxication symptoms ,biology.organism_classification ,trapoeraba ,Commelina benghalensis ,Horticulture ,chemistry.chemical_compound ,chemical control ,chemistry ,Glyphosate ,Botany ,Phytotoxicity ,soja transgênica ,controle químico ,General Agricultural and Biological Sciences ,Chemical control ,transgenic soybean ,Roundup Ready ,sintomas de fitointoxicação ,Lactofen - Abstract
Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:51:50Z No. of bitstreams: 1 S0006-87052008000300015.pdf: 99263 bytes, checksum: a5edb46650c05df65bd075072f70878f (MD5) Made available in DSpace on 2013-08-22T18:51:50Z (GMT). No. of bitstreams: 1 S0006-87052008000300015.pdf: 99263 bytes, checksum: a5edb46650c05df65bd075072f70878f (MD5) Previous issue date: 2008-01-01 Made available in DSpace on 2013-09-30T17:54:28Z (GMT). No. of bitstreams: 2 S0006-87052008000300015.pdf: 99263 bytes, checksum: a5edb46650c05df65bd075072f70878f (MD5) S0006-87052008000300015.pdf.txt: 32289 bytes, checksum: c4578148b659dc3a50fe0e4f2155e208 (MD5) Previous issue date: 2008-01-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:15:08Z No. of bitstreams: 2 S0006-87052008000300015.pdf: 99263 bytes, checksum: a5edb46650c05df65bd075072f70878f (MD5) S0006-87052008000300015.pdf.txt: 32289 bytes, checksum: c4578148b659dc3a50fe0e4f2155e208 (MD5) Made available in DSpace on 2014-05-20T13:15:08Z (GMT). No. of bitstreams: 2 S0006-87052008000300015.pdf: 99263 bytes, checksum: a5edb46650c05df65bd075072f70878f (MD5) S0006-87052008000300015.pdf.txt: 32289 bytes, checksum: c4578148b659dc3a50fe0e4f2155e208 (MD5) Previous issue date: 2008-01-01 O objetivo do trabalho foi avaliar os possíveis efeitos fitotóxicos de herbicidas aplicados em pós-emergência, isolados e em misturas, na soja transgênica (cv. M-SOY 8008 RR) tolerante ao glyphosate e no controle de plântulas de Commelina benghalensis. Os experimentos foram desenvolvidos no período de janeiro a maio de 2006, em vasos, mantidos em condições de ambiente não controlado, no Departamento de Fitossanidade, UNESP, Campus de Jaboticabal (SP). Os tratamentos avaliados foram: glyphosate (1,20 kg ha-1 e.a.), chlorimuron-ethyl (0,02 kg ha-1), lactofen (0,18 kg ha-1), fomesafen (0,25 kg ha-1), flumioxazin (0,025 kg ha-1), imazethapyr (0,10 kg ha-1), chlorimuron-ethyl (0,01 kg ha-1) mais lactofen (0,096 kg ha-1), chlorimuron-ethyl (0,01 kg ha-1) mais fomesafen (0,125 kg ha-1), lactofen (0,096kg ha-1) mais fomesafen (0,125 kg ha-1), as misturas de glyphosate (0,60kgha-1) com chlorimuron-ethyl (0,01 kg ha-1), lactofen (0,096 kg ha-1), fomesafen (0,125 kg ha-1), flumioxazin (0,0125 kg ha-1), imazethapyr (0,05 kg ha-1) e uma testemunha sem aplicação de herbicida. No experimento com C. benghalensis, testou-se também a aplicação seqüencial de glyphosate (0,96 mais 0,72 kg ha-1 e.a.). A associação de ghyphosate a herbicidas utilizados em soja convencional ocasionou danos visuais às plantas de soja. em alguns casos, como nas misturas de glyphosate com lactofen e glyphosate com flumioxazin, os sintomas foram severos, com necroses e pontos cloróticos nas folhas. Mesmo assim, essa fitointoxicação não influenciou no desenvolvimento vegetativo e reprodutivo da soja. A mistura de glyphosate a outros herbicidas, assim como a sua aplicação seqüencial, não foram eficazes no controle de C. benghalensis, nas doses testadas e quando as plantas estavam no estádio de 4 a 6 folhas totalmente expandidas. The objective of this study was to evaluate phytotoxicity effects of herbicides applied during post-emergence, either alone or in mixture with other chemicals in transgenic glyphosate-tolerant soybean (cv. M-SOY 8008 RR) and in Commelina benghalensis. Two experiments were carried out from January to May 2006, in pots, under uncontrolled conditions, at Plant Protection Department of UNESP, Jaboticabal (SP), Brazil. The following herbicides were used: glyphosate (1,20 kg a.e. ha-1), chlorimuron-ethyl (0,02 kg ha-1), lactofen (0,018 kg ha-1), fomesafen (0,25kg ha-1), flumioxazin (0,025 kg ha-1), imazethapyr (0,10 kg ha-1), chlorimuron-ethyl (0,01 kg ha-1) plus lactofen (0,096 kg ha-1), chlorimuron-ethyl (0,01 kg ha-1) plus fomesafen (0,125 kg ha-1) and lactofen (0,096 kg ha-1) plus fomesafen (0,125 kg ha-1). It was also used the glyphosate (0,60 kg a.e. ha-1) in mixture with chlorimuron-ethyl (0,01 kg ha-1), lactofen (0,096 kg ha-1), fomesafen (0,125 kg ha-1), flumioxazin (0,0125 kg ha-1) and imazethapyr (0,05 kg ha-1) and a no treated control. Also the sequential application of glyphosate (0,96 plus 0,72 kg a.e. ha-1) was used in the experiment with C. benghalensis. The association of glyphosate and conventional soybean herbicides caused soybean injury. In some cases, such as in the glyphosate-lactofen and glyphosate-flumioxazin mixtures, the symptoms were severe, with necrosis and clorosis. Although there were phytotoxic symptoms in the plant, the herbicide did not affect vegetative and reproductive soybean development. The mixture of glyphosate to other herbicides and its sequential application did not control C. benghalensis, when sprayed in the tested doses and in plants with 4 to 6 expanded leaves. Universidade Estadual Paulista Departamento de Fitossanidade UNESP FCAV Departamento de Fitossanidade Universidade Estadual Paulista Departamento de Fitossanidade UNESP FCAV Departamento de Fitossanidade
- Published
- 2008
16. Subclinical symptoms of intoxication associated with exposure to low levels of mercury by dentists
- Author
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Neghab, M., alireza choobineh, Hasan-Zadeh, J., and Ghaderi, E.
- Subjects
Dentists ,lcsh:R ,Intoxication symptoms ,lcsh:Medicine ,Mercury ,Amalgam filling ,Occupational exposure - Abstract
Background and aims Dentists are occupationally exposed to elemental mercury from placements of mercury-containing amalgam. Although many studies have been conducted on mercury intoxication, there is still widespread concern about possible ill effects of chronic low-level mercury exposure on dentists. The present study examined the effects of occupational exposure to low levels of mercury by a group of dentists. Methods In this historical cohort study, subjects consisted of 106 dentists and 94 general practitioners (referent group), from private and public clinics in Shiraz city. Subjects were requested to complete a questionnaire on demographic variables, symptoms experienced and work practices. Additionally, using standard methods, atmospheric and urinary concentrations of mercury were measured. The data were analyzed by appropriate statistical tests. In univariat analysis, Chi-Square test was used to compare the prevalence of symptoms among both groups. Independent sample t-test and Mann-Whitney’s U-test were used to compare the mean and median of quantitative data of both groups. Multivariate logistic regression analysis was used to adjust for potential confounders. Results Both groups were similar as far as most demographic and socioeconomic variables, but age and number of personal amalgam fillings, were concerned. Median of atmospheric concentration of mercury was found to be 3.35 μg/m3. Likewise, the urinary concentration of mercury in dentists was estimated to be 3.22 μg /g.creatinine. This value was significantly higher than that of the referent group. Additionally, analysis of the data revealed that subclinical symptoms of intoxication were more prevalent in dentists. Conclusion Our findings indicate that occupational exposure to mercury by dentists, even at low levels, is associated with a significant increase in the prevalence of subclinical symptoms of intoxication.
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