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Fertirrigation for Vegetables Grown in Greenhouses
Putti, Fernando Ferrari,Cremasco, Camila Pires,Filho, Luis Roberto Almeida Gabriel,Reis, Andre Rodrigues Do Korean Society for Agricultural Machinery 2014 바이오시스템공학 Vol.39 No.4
Purpose: Concerns over the quantity of available freshwater for agriculture have triggered the development of technologies intended to increase efficiency of water use, especially with regard to irrigation. A new technique called fertirrigation has been developed to use the same irrigation equipment for fertilization. Methods: Since the above-mentioned technique requires care during installation and use on farms, current analysis focuses on some of its characteristics. Results: High uniformity irrigation systems provide the best distribution of fertilizers, especially when used in combination with drip irrigation or micro-aspersion. The factors purity, compatibility, acidification, salinity, and solubility should be taken into account. Conclusions: Fertirrigation provides a significant increase in productivity as it allows for highly controlled nutrient application during the entire growing season. However, it may cause serious problems if misused or overused.
Sudhir, Putty-Reddy,Pogoryelov, Denys,Kovacs, Laszlo,Garab, Gyozo,Murthy, Sistla D.S. Korean Society for Biochemistry and Molecular Biol 2005 Journal of biochemistry and molecular biology Vol.38 No.4
The response of Spirulina (Arthrospira) platensis to high salt stress was investigated by incubating the cells in light of moderate intensity in the presence of 0.8 M NaCl. NaCl caused a decrease in photosystem II (PSII) mediated oxygen evolution activity and increase in photosystem I (PSI) activity and the amount of P700. Similarly maximal efficiency of PSII (Fv/Fm) and variable fluorescence (Fv/Fo) were also declined in salt-stressed cells. Western blot analysis reveal that the inhibition in PSII activity is due to a 40% loss of a thylakoid membrane protein, known as D1, which is located in PSII reaction center. NaCl treatment of cells also resulted in the alterations of other thylakoid membrane proteins: most prominently, a dramatic diminishment of the 47-kDa chlorophyll protein (CP) and 94-kDa protein, and accumulation of a 17-kDa protein band were observed in SDS-PAGE. The changes in 47-kDa and 94-kDa proteins lead to the decreased energy transfer from light harvesting antenna to PSII, which was accompanied by alterations in the chlorophyll fluorescence emission spectra of whole cells and isolated thylakoids. Therefore we conclude that salt stress has various effects on photosynthetic electron transport activities due to the marked alterations in the composition of thylakoid membrane proteins.
Fertirrigation for Vegetables Grown in Greenhouses
Fernando Ferrari Putti,Camila Pires Cremasco,Luís Roberto Almeida Gabriel Filho,André Rodrigues do Reis 한국농업기계학회 2014 바이오시스템공학 Vol.39 No.4
Purpose: Concerns over the quantity of available freshwater for agriculture have triggered the development of technologiesintended to increase efficiency of water use, especially with regard to irrigation. A new technique called fertirrigation hasbeen developed to use the same irrigation equipment for fertilization. Methods: Since the above-mentioned techniquerequires care during installation and use on farms, current analysis focuses on some of its characteristics. Results: Highuniformity irrigation systems provide the best distribution of fertilizers, especially when used in combination with dripirrigation or micro-aspersion. The factors purity, compatibility, acidification, salinity, and solubility should be taken intoaccount. Conclusions: Fertirrigation provides a significant increase in productivity as it allows for highly controlled nutrientapplication during the entire growing season. However, it may cause serious problems if misused or overused.
EOMETRIC ANALYSIS OF NET PRESENT VALUE AND INTERNAL RATE OF RETURN
GABRIEL FILHO, L.A.,CREMASCO, C.P.,PUTTI, F.F.,GOES, B.C.,MAGALHAES, M.M. The Korean Society for Computational and Applied M 2016 Journal of applied mathematics & informatics Vol.34 No.1
The objective of this work is to perform a geometric analysis of the net present value (NPV) and Internal Rate of Return (IRR), defining analytics and in verifying the relationship between geometric properties of such functions. For this simulation, was used the values of the cash flows for each period identical and equal to US$ 200.00 cash, the initial investment US$ 1,000.00 and investments of each identical and equal to US$ 50.00 period. In addition, the discount rate and time were considered a maximum of 2 years (24 months) at a rate between 0 and 100%. The geometric analysis of the characteristics obtained from the expressions of the Net Present Value and Internal Rate of Return possible to observe that besides the analytical dependence between these quantities , the geometric relationships are relevant when studied in relation to the zero NPV and expressed a great contribution the sense of a broad vision for the administrator in the analysis of analytical variables that in uences the balance sheet of the company.
Lee, Ki-Young,Kim, Joung-Yoon,Putti, Kiran,Bennett, Deborah H.,Cassady, Diana,Hertz-Picciotto, Irva Korean Society of Environmental Health 2009 한국환경보건학회지 Vol.35 No.6
Exposure analysis is a critical component of determining the health impact of pollutants. Global positioning systems (GPS) could be useful in developing time-location information for use in exposure analysis. This study compares four low cost GPS receivers with data logging capability (Garmin 60, Garmin Forerunner 201, GeoStats GeoLogger and Skytrx minitracker MT4100) in terms of accuracy, precision, and ease of use. The accuracy of the devices was determined at two known National Geodetic Survey points. The coordinates logged by the devices were compared when the devices were carried while walking and driving. The Garmin 60 showed better accuracy and precision than the GeoLogger when they were placed at the geodetic points. The Forerunner and Skytrx did not record when they were kept stationary. When the subject wore the devices while walking, the location of the devices differed by about 8 m on average between any two device combinations involving the four devices. The distance between the coordinates logged by the devices decreased when the devices were carried with their antennas facing the sky. All the devices showed similar routes when they were used in a car. All the devices except the Forerunner had satisfactory signal reception when they were worn and when they were carried in the car. The GeoLogger is less comfortable for the subject because of specific wearing requirements. This evaluation found that the Garmin 60 and the Skytrx may be useful in personal exposure analysis studies to record time-location data.
이기영,Diana Cassady,김정윤,Kiran Putti,Deborah H. Bennett,Irva Hertz-Picciotto 한국환경보건학회 2009 한국환경보건학회지 Vol.35 No.6
Exposure analysis is a critical component of determining the health impact of pollutants. Global positioning systems (GPS) could be useful in developing time-location information for use in exposure analysis. This study compares four low cost GPS receivers with data logging capability (Garmin 60, Garmin Forerunner 201, GeoStats GeoLogger and Skytrx minitracker MT4100) in terms of accuracy, precision, and ease of use. The accuracy of the devices was determined at two known National Geodetic Survey points. The coordinates logged by the devices were compared when the devices were carried while walking and driving. The Garmin 60 showed better accuracy and precision than the GeoLogger when they were placed at the geodetic points. The Forerunner and Skytrx did not record when they were kept stationary. When the subject wore the devices while walking, the location of the devices differed by about 8 m on average between any two device combinations involving the four devices. The distance between the coordinates logged by the devices decreased when the devices were carried with their antennas facing the sky. All the devices showed similar routes when they were used in a car. All the devices except the Forerunner had satisfactory signal reception when they were worn and when they were carried in the car. The GeoLogger is less comfortable for the subject because of specific wearing requirements. This evaluation found that the Garmin 60 and the Skytrx may be useful in personal exposure analysis studies to record time-location data.