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Search Results: 1 - 10 of 877 matches for " Massaru Yokoyama "
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Danos de Zabrotes subfasciatus (Boh.) (Coleoptera: Bruchidae) em linhagens de feijoeiro (Phaseolus vulgaris L.) contendo arcelina
Barbosa, Flávia R.;Yokoyama, Massaru;Pereira, Pedro A. A.;Zimmermann, F. J. P.;
Anais da Sociedade Entomológica do Brasil , 2000, DOI: 10.1590/S0301-80592000000100014
Abstract: arcelin is a seed protein found in wild beans which gives resistance to the mexican bean weevil, zabrotes subfasciatus (coleoptera: bruchidae). the contribution of four alleles of the protein arcelin (arc1, arc2, arc3 and arc4), present in four near isogenic lines was evaluated for the control of z. subfasciatus, at intervals between 15 and 150 days of storage, at 15 days intervals, using the susceptible cultivars porrillo 70 and goiano precoce as control. at intervals between 90 - 150 days and 60 - 150 days of storage, the lines containing arc1 and arc2 had, respectively, less eggs and adults than those containing arc3 and the susceptible cultivars. com rela??o a arc4, constataram-se menor número de ovos e adultos em arc1 e arc2, aos 90 dias e a partir dos 135 dias. as a result of the low adult emergence in arc1 and arc2, at the end of the storage period, highly significant differences were observed in the percentage of damaged seeds by the weevil among the lines containing arc1 (0%), arc2 (8.0%), the susceptible cultivars porrillo 70 (73.7%) and goiano precoce (99.3%) and the lines containing arc3 (86.3%) and arc4 (48%). the percentage of plant emergence imediately before and at 150 days of storage varied, respectively, from 95.7% to 92.0% in arc1, from 96.3% to 84.3% in arc2, from 97.0% to 30.0% in arc3, from 95.3% to 83.0% in arc4, from 97.3% to 41.3% in 'porrillo 70', and from 95.7% to 6.7% in 'goiano precoce'.
Controle do caruncho-do-feijoeiro Zabrotes subfasciatus com óleos vegetais, munha, materiais inertes e malathion
Barbosa, Flávia Rabelo;Yokoyama, Massaru;Pereira, Pedro Ant?nio Arraes;Zimmermann, Francisco José Pfeilsticker;
Pesquisa Agropecuária Brasileira , 2002, DOI: 10.1590/S0100-204X2002000900002
Abstract: the effects of malathion 500 ce, neem (azadirachta indica a. juss.) and soybean (glycine max merrill) oils, inert materials and trashing residues on the control of zabrotes subfasciatus (coleoptera:bruchidae) were evaluated on bean seeds (phaseolus vulgaris l.), using the cultivar carioca and two lines containing the protein arcelin (arc1 and arc3). the experiment was carried in a laboratory at embrapa-centro nacional de pesquisa de arroz e feij?o, santo ant?nio de goiás, go, brazil, under noncontrolled conditions. the highest levels of protection against z. subfasciatus were observed in arc1, with reduction in the number of eggs, number of emerged adults and percentage of damaged seeds than in arc3 and carioca cultivar. the number of eggs, number of emerged adults and the percentage of damaged seeds were reduced when the seeds were treated with malathion, neem and soybean oils. there was not difference in percentage of damaged seeds between malathion and neem oil. the treatment of the seeds using ant hill ground showed low efficiency, and trashing residues and dolomitic lime did not show reduction on the progeny and damage of z. subfasciatus.
Estabilidade da resistência a Zabrotes subfasciatus conferida pela proteína arcelina, em feijoeiro
BARBOSA, FLáVIA RABELO;YOKOYAMA, MASSARU;PEREIRA, PEDRO ANT?NIO ARRAES;ZIMMERMANN, FRANCISCO JOSé PFEILSTICKER;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000500005
Abstract: arcelin is a seed protein found in beans which gives resistance to mexican bean weevil, zabrotes subfasciatus (boh., 1833) (coleoptera: bruchidae). compared with the susceptible cultivars porrillo 70 and goiano precoce, the stability of the resistance conferred by two alleles of the protein arcelin was observed in lines arc1 and arc4 after raising the insects for four consecutive generations feeding in the same genotype. the experiment was carried out at embrapa-centro nacional de pesquisa de arroz e feij?o (cnpaf), at santo ant?nio de goiás, goiás state, brazil, under non-controlled conditions using a randomized complete block design. in the lines containing arcelin reduction in the number of eggs and emerged adults, insects weight and elongation of the egg/adult cycle was observed. the resistance was greater in the line carrying arc1 allele. the parameters number of eggs and emerged adults, egg/adult cycle, sexual ratio and males weight was not altered on arc1 genotype, although a progressive increase of the females weight was observed. on the genotype containing arc4 allele there was a reduction in the egg/adult cycle, although the number of eggs and emerged adults, sexual ratio and males and females weight were not altered.
Efeito da proteína arcelina na biologia de Zabrotes subfasciatus (Boheman 1833), em feijoeiro
Barbosa, Flávia Rabelo;Yokoyama, Massaru;Pereira, Pedro Ant?nio Arraes;Zimmermann, Francisco José Pfeilsticker;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999001000006
Abstract: arcelin is a seed protein found in wild beans (phaseolus vulgaris) which gives resistance to mexican bean weevil, zabrotes subfasciatus (boheman 1833) (coleoptera: bruchidae). studies were carried out with the objective of estimating the effect of four alleles of protein arcelin (arc1, arc2, arc3 and arc4) on the biology of z. subfasciatus. the experiment was carried out in laboratory at embrapa-centro nacional de pesquisa de arroz e feij?o, in santo ant?nio de goiás, go, brazil, under non controlled conditions. the highest levels of antibiosis to z. subfasciatus were observed in arc1, with reduction in the number of eggs, number of emerged adults, adults longevity. in the line arc2 only reduction in the number of emerged adults was observed. the lines arc3 and arc4 showed low efficiency on the reduction of progeny of z. subfasciatus and effects in the longevity and egg-adult cycle were not detected. insect sexual ratio was not altered by the presence of arc1, arc2, arc3 and arc4 in the seeds.
COMPATIBILIDADE DO INSETICIDA THIAMETHOXAM COM FUNGICIDAS UTILIZADOS NO TRATAMENTO DE SEMENTES DE FEIJOEIRO COMPATIBILITY OF THE INSECTICIDE THIAMETHOXAM WITH FUNGICIDES APPLIED TO COMMON BEAN SEEDS
Rosana Gon?alves Barros,Massaru Yokoyama,Jefferson Luis da Silva Costa
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v31i2.2484
Abstract: A mosca-branca (Bemisia argentifolli Bellows & Perring) tem causado sérios prejuízos em muitas áreas produtoras de feij o no Brasil. O dano indireto através da transmiss o do vírus do mosaico dourado é um dos fatores limitantes na produ o do feij o, podendo causar perdas de até 100%. Uma das medidas recentemente desenvolvidas para o controle desta praga é o tratamento das sementes com inseticida. Neste trabalho foi testada a compatibilidade do inseticida thiamethoxam com alguns dos fungicidas utilizados para tratamento de sementes de feij o destinadas ao plantio (difenoconazole, fludioxonil e carboxin). As variáveis utilizadas na avalia o foram: porcentagens de germina o, de sanidade das sementes e de eficiência de controle da mosca-branca. Considerando todas as variáveis, constatou-se que n o houve incompatibilidade do inseticida com os fungicidas utilizados. Os tratamentos thiamethoxam+carboxin e thiamethoxam+fludioxonil foram os que apresentaram maior eficiência no controle de fungos incidentes em sementes e da mosca-branca em plantulas até os onze dias após a emergência. PALAVRAS-CHAVE: Mosca-branca; Bemisia argentifolli; fungos de sementes; controle químico. The white fly (Bemisia argentifolli Bellows & Perring) causes serious damage to the common bean crop in Brazil. The indirect damage through the transmission of bean gold mosaic virus can cause losses of up to 100%. One measure recently developed to control this pest is insecticide seed dressing. In this study, the compatibility of the insecticide thiamethoxam with the fungicides used for dry beans seed dressing was tested. These treatments included the fungicides difenoconazole, fludioxonil and carboxin. The variables evaluated were germination, seed health and white fly control efficiency. Considering these variables it was observed that the insecticide was compatible with the fungicides studied. The treatments thiamethoxam+carboxin and thiamethoxam+fludioxonil were the most efficient in controlling seed-borne fungi as well as white fly on plants. KEY-WORDS: White fly; Bemisia argentifolli; seed fungi; chemical control.
Controle do caruncho-do-feijoeiro Zabrotes subfasciatus com óleos vegetais, munha, materiais inertes e malathion
Barbosa Flávia Rabelo,Yokoyama Massaru,Pereira Pedro Ant?nio Arraes,Zimmermann Francisco José Pfeilsticker
Pesquisa Agropecuária Brasileira , 2002,
Abstract: Na busca de alternativas ao controle químico do caruncho Zabrotes subfasciatus (Coleoptera:Bruchidae), avaliou-se, em feijoeiro (Phaseolus vulgaris L.), o efeito de três genótipos, cv. Carioca e duas linhagens contendo a proteína arcelina (Arc1 e Arc3), e da adi o nos gr os armazenados de óleo de soja (Glycine max Merrill); óleo de nim (Azadirachta indica A. Juss.), munha (resíduo de trilha da colheita), calcário dolomítico e terra de formigueiro, comparativamente aos gr os n o tratados e ao controle químico com malathion 500 CE. O experimento foi realizado no laboratório da Embrapa-Centro Nacional de Pesquisa de Arroz e Feij o, localizado no Município de Santo Ant nio de Goiás, GO, em condi es n o controladas. Na linhagem Arc1, constatou-se maior prote o aos danos do caruncho, observando-se redu o do número de ovos e de adultos emergidos e da porcentagem de sementes danificadas em rela o à Arc3 e à cv. Carioca. Quando os gr os foram tratados com malathion, óleo de nim e óleo de soja, observou-se menor número de ovos e de adultos emergidos e redu o de danos, e n o houve diferen a na porcentagem de sementes danificadas entre o malathion e o óleo de nim. A mistura das sementes com terra de formigueiro conferiu baixa prote o ao caruncho, enquanto os tratamentos com munha e calcário dolomítico n o apresentaram eficiência na redu o da progênie e dos danos de Z. subfasciatus.
Estabilidade da resistência a Zabrotes subfasciatus conferida pela proteína arcelina, em feijoeiro
BARBOSA FLáVIA RABELO,YOKOYAMA MASSARU,PEREIRA PEDRO ANT?NIO ARRAES,ZIMMERMANN FRANCISCO JOSé PFEILSTICKER
Pesquisa Agropecuária Brasileira , 2000,
Abstract: A arcelina é uma proteína encontrada em feij es silvestres e confere resistência ao caruncho-do-feij o, Zabrotes subfasciatus (Boh., 1833) (Coleoptera: Bruchidae). Comparativamente às cultivares suscetíveis Porrillo 70 e Goiano Precoce, estudou-se a estabilidade da resistência, conferida por dois alelos da proteína arcelina, nas linhagens do feijoeiro Arc1 e Arc4, após a cria o do inseto por quatro gera es sucessivas no mesmo genótipo. O experimento foi conduzido no Laboratório da Embrapa-Centro Nacional de Pesquisa de Arroz e Feij o (CNPAF), no município de Santo Ant nio de Goiás, GO, em condi es n o-controladas, utilizando-se delineamento experimental inteiramente ao acaso. Observaram-se, nas linhagens portadoras de arcelina, redu o do número de ovos e de adultos emergidos, redu o do peso dos insetos, e prolongamento do período ovo-adulto. Na linhagem Arc1, a resistência ao Z. subfasciatus foi mais expressiva. Nessa linhagem, os parametros número de ovos, número de adultos emergidos, período ovo-adulto, raz o sexual e peso de machos n o foram alterados, porém observou-se aumento progressivo de peso das fêmeas nas gera es. Na linhagem Arc4, houve redu o do período ovo-adulto, embora o número de ovos e de adultos emergidos, raz o sexual e peso de machos e fêmeas n o tenham sido alterados.
Myocardial insulin resistance does not always parallel skeletal muscle and whole body insulin resistance: A mini review
—Myocardial Insulin Resistance
 [PDF]

Ikuo Yokoyama
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.61005
Abstract:

Insulin resistance (IR) is recognized to be of critical importance in a variety of metabolic diseases and coronary artery disease (CAD). Impaired skeletal muscle glucose utilization (SMGU) plays an important role in the pathogenesis of IR, whereas it is controversial whether myocardial IR is similar in this respect. Methods: Twenty-two studies of myocardial IR and skeletal muscle IR using positron emission tomography (PET) and/or whole body IR were reviewed. Heart and skeletal muscle IR were measured with PET and18F-FDG under hyperinsulinemic euglycemic insulin clamp technique. Whole body IR was also determined at the time of PET under hyperinsulinemic euglycemic insulin clamp technique. Results: One study reported that heart and skeletal muscle IR is present in untreated type 2 diabetes mellitus (T2DM), hypertension and CAD (as reflected in a myocardial glucose utiliation rate (MGU) in T2DM vs control [p < 0.01], and an SMGU in T2DM vs control [p < 0.01]). A significant negative relationship between MGU and FFA (r = -0.665, p < 0.01) and a significant positive relationship between MGU and whole body IR (r = 0.855, p < 0.01) was also observed in T2DM. Significantly reduced MGU and SMGU and a positive correlation between them (r = 0.78, P < 0.0001) were noted in the normal myocardial segments of patients with CAD. Another study showed that heart and skeletal muscle IR was present in T2DM both with CAD (MGU):, p < 0.01; SMGU: p < 0.01) or without CAD (MGU: p < 0.01; SMGU: p = 0.06). A significant positive relationship between the whole body glucose disposal rate and MGU (r = 0.60, p < 0.01) as well as SMGU (r = 0.76, p < 0.01) was also reported. Much more severe myocardial IR in T2DM and hypertriglyceridemia (p < 0.05) due to increased plasma free fatty acids, FFA (r = -0.60, p < 0.01) and plasma triglycerides levels (r =-0.74, p < 0.001) was reported. A significant negative relationship between MGU and plasma triglycerides (r = -0.74, p < 0.001) was also noted. However, other studies reported that MGU was increased in essential hypertension despite the fact that SMGU and whole body IR were present. Furthermore, it has also been

Ezetimibe Completely Replaced LDL-Apheresis for the Treatment of Familial Hypercholesterolemia and Coronary Artery Disease after CABG—A Case Report  [PDF]
Ikuo Yokoyama
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.62A028
Abstract:
Intensive treatment of hyperlipidemia is an important factor in the prevention of cardiovascular disease. Among several therapies, statins are well recognized as playing a central role, although low density lipoprotein bound cholesterol-apheresis can be used to treat very severe cases of familial hypercholesterolemia. However, statins are not always effective on their own and, recently, ezetimibe has emerged as a unique anti- hypercholesterolemic drug that acts as a cholesterol transporter inhibitor; its role is only partially understood. I experienced rare case that appeared to benefit from ezetimibe therapy, and report them as they help increase our knowledge of this novel drug.
Survival Analysis of Victims of Sulfur Oxide Air Pollution Suffering from COPD or Asthma in Yokkaichi, Japan, in Relation to Predisposing Exposure  [PDF]
Peng Guo, Kazuhito Yokoyama
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.329142
Abstract: To investigate the relationships between clinical findings and symptoms and the survival of patients with Yokkaichi Asthma, in relation to predisposing sulfur dioxide (SO2) exposure, we examined records of 1836 patients registered in the city of Yokkaichi during 1973-1988 by “Pollution-Related Health Damage Compensation Law.” Complete records were obtained from 735 patients (352 males and 383 females) until December 31, 2007, and were used for the analysis. Ambient SO2 concentrations in the Yokkaichi area were obtained from the Environmental Numeric Database of the National Institute for Environmental Science, Japan. It was found that severity of clinical symptoms and decreased pulmonary function were significantly correlated with predisposing SO2 exposure. A Cox proportional hazards analysis revealed that among all patients (COPD and asthma), age, forced expiratory volume 1.0 (sec) % and smoking affected mortality for both males and females. Significant associations between mortality, vital capacity (percent predicted) and cough and sputum were observed in males. Thus, the survival of patients with Yokkaichi Asthma was affected by severity of clinical symptoms and decreased pulmonary function, which were related to predisposing SO2 exposure. It appeared that the effects of clinical changes were greater in males than in females.
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