| 81 matches found in 74 documents. Search time: 0.024 seconds. |
|---|
|
Score: 1.00 |
|---|
| Title: [ Marking-release-recapture methods for determining the size of the natural population of Anopheles albitarsis l . s ( Diptera : Culicidae ) ] | | Author: Santos RL Forattini OP .
| | Journal: Citation: V : 33 ( 3 ) P : 309-13 Year: 1999 Type: ARTICLE | | Literature: oryza Field: abstract Doc ID: pub10457005 Accession (PMID): 10457005 | | Abstract: OBJECTIVE : In order to evaluate the size of the Anopheles albitarsis s . l . population in the Ribeira Valley region of the south-eastern S Paulo State , Brazil , marking-release-recapture experiments were carried out on the Experimental Farm in Pariquera-Au county where an artificial irrigation system for the cultivation of rice has been installed .
The experiments aimed at determining the vectorial capacity of this species .
METHODS : During the summer ( January , February and March ) , three marking-release-recapture experiments with field and laboratory reared populations were conducted to evaluate the population size .
Simultaneous human bait collections were also carried out to estimate the human biting rate .
RESULTS : The population sizes of the three experiments were estimated to be 64 , 560 , 50 , 503 and 22 , 684 mosquitoes .
The bite/man/night rate varied from 41 . 5 to 524 , 5 .
DISCUSSION : The results indicated high mosquito density in the summer which allow one to infer that , even though the survival rate is low , the number of remaining females is large enough to outlive the parasites extrinsic developmental period .
| Matching Sentences:
[ Sen. 1, subscore: 1.00 ]: OBJECTIVE : In order to evaluate the size of the Anopheles albitarsis s . l . population in the Ribeira Valley region of the south-eastern S Paulo State , Brazil , marking-release-recapture experiments were carried out on the Experimental Farm in Pariquera-Au county where an artificial irrigation system for the cultivation of rice has been installed . The experiments aimed at determining the vectorial capacity of this species . METHODS : During the summer ( January , February and March ) , three marking-release-recapture experiments with field and laboratory reared populations were conducted to evaluate the population size . Simultaneous human bait collections were also carried out to estimate the human biting rate . RESULTS : The population sizes of the three experiments were estimated to be 64 , 560 , 50 , 503 and 22 , 684 mosquitoes .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 1.00 |
|---|
| Title: [ Mite contamination in polished rice and beans sold at markets ] | | Author: Franzolin MR Baggio D | | Journal: Citation: V : 34 ( 1 ) P : 77-83 Year: 2000 Type: ARTICLE | | Literature: oryza Field: abstract Doc ID: pub10769365 Accession (PMID): 10769365 | | Abstract: OBJECTIVE : To evaluate mite contamination rate in grains commercialized in nine municipal markets of the city of So Paulo , in the period from November 1989 to November 1990 .
METHODS : 23 samples of polished rice and 53 samples of beans were microscopically examined after sieving , once a week and during 42 days at air temperature .
Other sample fractions were kept in an incubator at 25 degrees C and 75% Relative Humidity ( RH ) during 28 days .
RESULTS : Samples were negative for mites in the first day of analysis and were detected after incubation .
Samples incubated revealed a higher percentage of positive examinations for mites ( incidence ) : 31 . 7% ( and 1 , 845 mites ) ; while samples kept at air temperature showed only 6 . 9% ( and 45 mites ) .
Samples of polished rice were more contaminated in comparison to the ones of beans .
There was a larger amount of mites when the mean monthly temperature of the laboratory was between 21 . 5 degrees C to 22 . 5 degrees C ( 37 .
8% ) and humidity between 73 . 5% to 74 . 5% ( 31 . 1% ) .
CONCLUSIONS : The predominant species was Tyrophagus putrescentiae and other identified species were Blomia tropicalis , Cheyletus spp . , Blattisocius tarsalis , and others .
Mite population had a higher proliferation rate during spring , summer and in the beginning of autumn , due to highest temperature and humidity .
These results confirm the importance of improving grains storage , to avoid mites proliferation . | Matching Sentences:
[ Sen. 1, subscore: 1.00 ]: OBJECTIVE : To evaluate mite contamination rate in grains commercialized in nine municipal markets of the city of So Paulo , in the period from November 1989 to November 1990 . METHODS : 23 samples of polished rice and 53 samples of beans were microscopically examined after sieving , once a week and during 42 days at air temperature . Other sample fractions were kept in an incubator at 25 degrees C and 75% Relative Humidity ( RH ) during 28 days . RESULTS : Samples were negative for mites in the first day of analysis and were detected after incubation . Samples incubated revealed a higher percentage of positive examinations for mites ( incidence ) : 31 . 7% ( and 1 , 845 mites ) ; while samples kept at air temperature showed only 6 . 9% ( and 45 mites ) .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 1.00 |
|---|
| Title: Design strategy for assessing multi-pathway exposure for children : the Minnesota Childrens Pesticide Exposure Study ( MNCPES ) .
| | Author: Quackenboss JJ Pellizzari ED Shubat P Whitmore RW Adgate JL Thomas KW Freeman NC Stroebel C Lioy PJ Clayton AC Sexton K | | Journal: Citation: V : 10 ( 2 ) P : 145-58 Year: Type: ARTICLE | | Literature: oryza Field: abstract Doc ID: pub10791596 Accession (PMID): 10791596 | | Abstract: Although children are exposed to a variety of environmental hazards , including pesticides , there is a scarcity of information available to estimate exposures realistically .
This article reports on one of the first attempts to measure multi-pathway pesticide exposures in a population-based sample of urban and non-urban children .
A design strategy was developed to assess multi-pathway pesticide exposures in children using personal exposure measurements in combination with complimentary measurements of biological markers of exposure , concentrations in relevant environmental media , and time spent in important microenvironments and participating in exposure-related activities .
Sample collection and analysis emphasized measurement of three insecticides ( ie , chlorpyrifos , diazinon , and malathion ) and one herbicide ( ie , atrazine ) .
These compounds were selected because of their frequent use , presence in multiple environmental media , expected population exposures , and related hazard/toxicity .
The study was conducted during the summer of 1997 in Minnesota and involved a stratified sample of households with children ages 3-12 years .
Participants resided in either ( a ) the cities of Minneapolis and St Paul ( urban households ) , or ( b ) Rice and Goodhue Counties just south of the metropolitan area ( non-urban households ) .
Results from a residential inventory documenting storage and use of products containing the target pesticides were used to preferentially select households where children were likely to have higher exposures .
The study successfully obtained pesticide exposure data for 102 children , including measurements of personal exposures ( air , hand rinse , duplicate diet ) , environmental concentrations ( residential indoor/outdoor air , drinking water , residential surfaces , soil ) , activity patterns ( obtained by questionnaire , diary , videotaping ) , and internal dose ( metabolites in urine ) .
| Matching Sentences:
[ Sen. 7, subscore: 1.00 ]: A design strategy was developed to assess multi-pathway pesticide exposures in children using personal exposure measurements in combination with complimentary measurements of biological markers of exposure , concentrations in relevant environmental media , and time spent in important microenvironments and participating in exposure-related activities . Sample collection and analysis emphasized measurement of three insecticides ( ie , chlorpyrifos , diazinon , and malathion ) and one herbicide ( ie , atrazine ) . These compounds were selected because of their frequent use , presence in multiple environmental media , expected population exposures , and related hazard/toxicity . The study was conducted during the summer of 1997 in Minnesota and involved a stratified sample of households with children ages 3-12 years . Participants resided in either ( a ) the cities of Minneapolis and St Paul ( urban households ) , or ( b ) Rice and Goodhue Counties just south of the metropolitan area ( non-urban households ) . Results from a residential inventory documenting storage and use of products containing the target pesticides were used to preferentially select households where children were likely to have higher exposures . The study successfully obtained pesticide exposure data for 102 children , including measurements of personal exposures ( air , hand rinse , duplicate diet ) , environmental concentrations ( residential indoor/outdoor air , drinking water , residential surfaces , soil ) , activity patterns ( obtained by questionnaire , diary , videotaping ) , and internal dose ( metabolites in urine ) .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 1.00 |
|---|
| Title: Preferential occurrence of diazotrophic endophytes , Azoarcus spp . , in wild rice species and land races of Oryza sativa in comparison with modern races .
| | Author: Engelhard M Hurek T Reinhold-Hurek B | | Journal: Environ . Microbiol . Citation: V : 2 ( 2 ) P : 131-41 Year: 2000 Type: ARTICLE | | Literature: oryza Field: abstract Doc ID: pub11220300 Accession (PMID): 11220300 | | Abstract: Several diazotrophic species of Azoarcus spp . occur as endophytes in the pioneer plant Kallar grass .
The purpose of this study was to screen Asian wild rice and cultivated Oryza sativa varieties for natural association with these endophytes .
Populations of culturable diazotrophs in surface-sterilized roots were characterized by 16S rDNA sequence analysis , and Azoarcus species were identified by genomic fingerprints .
A indigens and Azoarcus sp . group C were detected only rarely , whereas Azoarcus sp . group D occurred frequently in samples of flooded plants : in 75% of wild rice , 80% of land races of O sativa from Nepal and 33% of modern cultivars from Nepal and Italy .
The putatively endophytic populations of diazotrophs differed with the rice genotype .
The diversity of cultured diazotrophs was significantly lower in wild rice species than in modern cultivars .
In Oryza officinalis ( from Nepal ) and O minuta ( from the Philippines ) , Azoarcus sp . group D were the predominant diazotrophic putative endophytes in roots .
In contrast , their number was significantly lower in modern cultivars of O sativa , whereas numbers and diversity of other diazotrophs , such as Azospirillum spp . , Klebsiella sp . , Sphingomonas paucimobilis , Burkholderia sp . and Azorhizobium caulinodans , were increased .
In land races of O sativa , the diazotrophic diversity was equally high ; however , Azoarcus sp . was found in high apparent numbers .
Similar differences in populations were also observed in a culture-independent approach comparing a wild rice ( O officinalis ) and a modern-type O sativa plant : in clone libraries of root-associated nitrogenase ( nifH ) gene fragments , the diazotrophic diversity was lower in the wild rice species .
New lineages of nifH genes were detected , eg one deeply branching cluster within the anf ( iron ) nitrogenases .
Our studies demonstrate that the natural host range of Azoarcus spp . extends to rice , wild rice species and old varieties being preferred over modern cultivars . | Matching Sentences:
[ Sen. 8, subscore: 1.00 ]: A indigens and Azoarcus sp . group C were detected only rarely , whereas Azoarcus sp . group D occurred frequently in samples of flooded plants : in 75% of wild rice , 80% of land races of O sativa from Nepal and 33% of modern cultivars from Nepal and Italy . The putatively endophytic populations of diazotrophs differed with the rice genotype . The diversity of cultured diazotrophs was significantly lower in wild rice species than in modern cultivars . In Oryza officinalis ( from Nepal ) and O minuta ( from the Philippines ) , Azoarcus sp . group D were the predominant diazotrophic putative endophytes in roots . In contrast , their number was significantly lower in modern cultivars of O sativa , whereas numbers and diversity of other diazotrophs , such as Azospirillum spp . , Klebsiella sp . , Sphingomonas paucimobilis , Burkholderia sp . and Azorhizobium caulinodans , were increased . In land races of O sativa , the diazotrophic diversity was equally high ; however , Azoarcus sp . was found in high apparent numbers . Similar differences in populations were also observed in a culture-independent approach comparing a wild rice ( O officinalis ) and a modern-type O sativa plant : in clone libraries of root-associated nitrogenase ( nifH ) gene fragments , the diazotrophic diversity was lower in the wild rice species . New lineages of nifH genes were detected , eg one deeply branching cluster within the anf ( iron ) nitrogenases . Our studies demonstrate that the natural host range of Azoarcus spp . extends to rice , wild rice species and old varieties being preferred over modern cultivars .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 3.00 |
|---|
| Title: Comparison of selenium status between Japanese living in Tokyo and Japanese brazilians in So Paulo , Brazil .
| | Author: Karita K Hamada GS Tsugane S | | Journal: Citation: V : 10 ( 3 ) P : 197-9 Year: Type: ARTICLE | | Literature: oryza Field: abstract Doc ID: pub11708308 Accession (PMID): 11708308 | | Abstract: Selenium ( Se ) concentrations were determined in human serum , rice and wheat flour sampled in the city of So Paulo , Brazil , and compared with those sampled in Tokyo . Japan . Serum levels of Se were significantly lower in Japanese Brazilians than Japanese living in Tokyo .
The samples of rice consumed by Japanese Brazilians in So Paulo contained 22 . 7 ng Se/g on average , which was about half the selenium level in rice consumed in Tokyo .
Rice commonly consumed in So Paulo might be one of the factors to lower the serum level of Se . | Matching Sentences:
[ Sen. 1, subscore: 1.00 ]: Selenium ( Se ) concentrations were determined in human serum , rice and wheat flour sampled in the city of So Paulo , Brazil , and compared with those sampled in Tokyo . Japan . Serum levels of Se were significantly lower in Japanese Brazilians than Japanese living in Tokyo . The samples of rice consumed by Japanese Brazilians in So Paulo contained 22 . 7 ng Se/g on average , which was about half the selenium level in rice consumed in Tokyo . Rice commonly consumed in So Paulo might be one of the factors to lower the serum level of Se .
[ Sen. 2, subscore: 1.00 ]: Selenium ( Se ) concentrations were determined in human serum , rice and wheat flour sampled in the city of So Paulo , Brazil , and compared with those sampled in Tokyo . Japan . Serum levels of Se were significantly lower in Japanese Brazilians than Japanese living in Tokyo . The samples of rice consumed by Japanese Brazilians in So Paulo contained 22 . 7 ng Se/g on average , which was about half the selenium level in rice consumed in Tokyo . Rice commonly consumed in So Paulo might be one of the factors to lower the serum level of Se .
[ Sen. 3, subscore: 1.00 ]: Selenium ( Se ) concentrations were determined in human serum , rice and wheat flour sampled in the city of So Paulo , Brazil , and compared with those sampled in Tokyo . Japan . Serum levels of Se were significantly lower in Japanese Brazilians than Japanese living in Tokyo . The samples of rice consumed by Japanese Brazilians in So Paulo contained 22 . 7 ng Se/g on average , which was about half the selenium level in rice consumed in Tokyo . Rice commonly consumed in So Paulo might be one of the factors to lower the serum level of Se .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
