نتایج جستجو برای: uan
تعداد نتایج: 184 فیلتر نتایج به سال:
Nitrate, phosphate, and ammonium loads at subsurface drains: agroecosystems and nitrogen management.
Artificial subsurface drainage in cropland creates pathways for nutrient movement into surface water; quantification of the relative impacts of common and theoretically improved management systems on these nutrient losses remains incomplete. This study was conducted to assess diverse management effects on long-term patterns (1998-2006) of NO, NH, and PO loads (). We monitored water flow and nut...
Increasing atmospheric nitrogen (N) deposition could profoundly impact community structure and ecosystem functions in forests. However, conventional experiments with understory addition of N (UAN) largely neglect canopy-associated biota and processes and therefore may not realistically simulate atmospheric N deposition to generate reliable impacts on forest ecosystems. Here we, for the first ti...
Medium Access Control (MAC) is an essential component of protocol stacks in Underwater Acoustic Networks (UANs). Numerous dedicated UAN MAC protocols have been proposed and studied via analysis and simulations. However, limited work has been done on evaluating these protocols in real ocean environments. To achieve a better understanding on how MAC protocols perform in real world UANs, we implem...
To investigate how organic anion transporter (OAT)-1 is involved in uric acid nephropathy (UAN), a rat model for UAN was established and the serum uric acid, blood urea nitrogen and serum creatinine levels were all measured, and observed to be increased. It was additionally identified that in UAN rats the surface OAT1 expression levels were reduced. By treating HEK cells with monosodium urate (...
Underwater acoustic networks (UAN) allow for efficiently exploiting and monitoring the sub-aquatic environment. These networks are characterized by long propagation delays, error-prone channels and half-duplex communication. In this paper, we address the problem of energy-efficient communication through the use of optimized channel coding parameters. We consider a two-layer encoding scheme empl...
Elucidating the effects of atmospheric nitrogen (N) deposition on fine root dynamics and potential underlying mechanisms is required to understand changes in belowground aboveground carbon storage. However, research these forests has mostly involved direct understory addition N ignored canopy interception processing N. Here, we conducted a field experiment comparing (CAN) with those (UAN) at th...
Ultra-long AlN nanowire arrays are prepared by chemical vapor deposition, and the photoconductive performances of individual nanowires are investigated in our self-built measurement system. Individual ultra-long AlN nanowire (UAN) exhibits a clear photoconductive effect under different excited lights. We attribute the positive photocurrent response of individual UAN to the dominant molecular se...
Limited information exists on the impact of addition 28% urea ammonium nitrate (UAN) to 2,4-D, applied preplant (PP) soybean, control multiple-herbicide-resistant (MHR) Canada fleabane. A total five field experiments were conducted over a two-year period (2020, 2021) in southwestern Ontario determine if MHR fleabane with 2,4-D ester PP can be improved by adding UAN spray solution. Glyphosate + ...
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