A series of (S)-proline-based enantiopure phosphorus triamide derivatives were prepared and evaluated as HMPA alternative in samarium diiodide cyclization reactions N-acylated indole derivatives. The expected tricyclic indoline generally obtained good to excellent yields, however, the induced enantioselectivities at best moderate. In our model reaction, derivative with a (dimethyl)hydroxymethyl...

The project goal was to loosely couple the SWAT model and the QUAL2E model and compare their combined ability to predict total phosphorus (TP) and NO3-N plus NO2-N yields to the ability of the SWAT model with its completely coupled water quality components to predict TP and NO3-N plus NO2-N yields from War Eagle Creek watershed in Northwest Arkansas. Model predictions were compared using a stat...

The 1,1 carboboration reaction of a variety of metal-substituted alkynes with simple trialkylboranes R3B yields the respective alkenylboranes (Wrackmeyer reaction). The use of the strongly electrophilic R-B(C6F5)2 reagents allows for much milder reaction conditions and gives good yields of the respective bulky alkenylboranes from conventional terminal alkynes by means of 1,2-hydride migration. ...

Florida is one of two states (FL and CA) that produce spring potatoes, FL having the highest crop value out any state in country ($469.67 per ton). Due to low phosphorus use efficiency (PUE), high rates (P) are applied ensure adequate yields. This has led a buildup legacy P, resulting mehlich-1 levels as 375 mg kg-1. These significantly higher than critical values for potatoes (25-35 kg-1), yet...

Crop rotation affects soil properties and microbial diversity structure. Currently, it is not well understood how changes following different crop systems of industrial hemp, an ancient economically important crop. Therefore, these were analyzed in this study. Our results showed that significantly affected the wilt disease incidence, plant height, yield, physicochemical communities greenhouse. ...

Excessive chemical fertilizer application in greenhouse vegetable cultivation results environmental risks and residual nutrients the soil. Conventional plot experiments conducted one field cannot recommend reduction to farmers when nutrient levels were various among different fields. In this study, nine simultaneously fields where soils could reflect of nutrient, with two rates (100 0%) for eac...

BACKGROUND The KDIGO work group recommends increasing dialytic phosphorus removal in Stage 5D chronic kidney disease patients with persistent hyperphosphatemia; however, optimal prescriptions to enhance phosphorus removal by hemodialysis (HD) therapies have not yet been established. This study evaluated whether phosphorus kinetic modeling based on a pseudo one-compartment model could provide pr...

Nitrogen (N) and phosphorus (P) loading from the Mississippi/Atchafalaya River Basin (MARB) has been linked to hypoxia in the Gulf of Mexico. To describe where and from what sources those loads originate, SPAtially Referenced Regression On Watershed attributes (SPARROW) models were constructed for the MARB using geospatial datasets for 2002, including inputs from wastewater treatment plants (WW...

The Staudinger ligation provides a means to form an amide bond between a phosphinothioester and azide. This reaction holds promise for the ligation of peptides en route to the total chemical synthesis of proteins. (Diphenylphosphino)methanethiol is the most efficacious of known reagents for mediating the Staudinger ligation of peptides, providing high (> 90%) isolated yields for equimolar coupl...

Story in Brief The phosphorus concentration in ruminal fluid was determined for steers limit-fed rations with phosphorus concentrations ranging from .06 to .17 percent. Ruminal phosphorus concentration was increased with phosphorus intake at dietary concentrations below .12 percent for steers. This relationship was employed to estimate the ruminal availability of phosphorus from four phosphorus...