James B Reeves
Affiliation: Agricultural Research Service
- Mid-infrared spectroscopy of biochars and spectral similarities to coal and kerogens: what are the implications?James B Reeves
Environmental Management and Byproduct Utilization Laboratory, Beltsville, Maryland 20705, USA
Appl Spectrosc 66:689-95. 2012....
- Does the spectral format matter in diffuse reflection spectroscopy?James B Reeves
EMBUL, Bldg 306, Rm 101, BARC East, Beltsville, Maryland 20705, USA
Appl Spectrosc 63:669-77. 2009....
- Mid-infrared diffuse reflectance spectroscopic examination of charred pine wood, bark, cellulose, and lignin: implications for the quantitative determination of charcoal in soilsJames B Reeves
Environmental Management and Byproduct Utilization Laboratory, BARC East, Beltsville, Maryland 20705, USA
Appl Spectrosc 62:182-9. 2008..120; and 0.982 and 0.101 meq/g, respectively), indicating that there is a sufficient commonality in the changes to develop calibrations without the need for unique calibrations for each specific material or condition of char formation...
- Mid-Infrared and near-infrared spectral properties of mycorrhizal and non-mycorrhizal root culturesFrancisco J Calderon
USDA ARS Central Great Plains Research Station, Akron, CO 80720, USA
Appl Spectrosc 63:494-500. 2009..Our results show that mycorrhizal and nonmycorrhizal root tissues can be differentiated via MIR and NIR spectra with the advantage that the same samples can then be used for other analyses...
- Stearic acid solubility and cubic phase volumeWalter F Schmidt
Animal and Natural Resources Institute, Beltsville Agricultural Research Center, ARS, USDA, Beltsville, MD 20705, United States
Chem Phys Lipids 142:23-32. 2006..Aggregation and dispersion from such cubic phases could also be present in more complex chemical and/or macromolecular environments...
- Comparison of diffuse reflectance fourier transform mid-infrared and near-infrared spectroscopy with grating-based near-infrared for the determination of fatty acids in foragesFrancisco J Calderon
USDA ARS Central Great Plains Research Station, 40335 County Rd GG, Akron, Colorado, 80720, USA
J Agric Food Chem 55:8302-9. 2007..It is not clear whether any of the spectral methods is distinctly better than another. Calibration R (2) and validation R (2) were higher for most FA with the SMNIR than the FTMIR and FTNIR...
- Mid-infrared and near-infrared calibrations for nutritional parameters of Triticale (Triticosecale) and pea (Pisum sativum)Francisco J Calderon
US Department of Agriculture, Central Great Plains Research Station, Agricultural Research Service, Akron, Colorado 80720, USA
J Agric Food Chem 57:5136-42. 2009..The NIR and MidIR are both useful as quick methods for measuring total N, and they show promise for measuring ADF and total N in forage samples, but performance with NDF was less satisfactory...
- Use of mid- and near-infrared spectroscopy to track degradation of bio-based eating utensils during compostingWalter Mulbry
USDA ARS, Environmental Management and Byproducts Lab, Building 308 Room 113 BARC East, 10, 300 Baltimore Avenue, Beltsville, Maryland 20705, USA
Bioresour Technol 109:93-7. 2012..These results confirm that MIRS and NIRS are useful in determining the composition of biobased materials. However, the spectra did not provide useful information about the extent of PLA polymer degradation...
- Specular reflection and diffuse reflectance spectroscopy of soilsJames B Reeves
Animal Manure and By Products Laboratory, Building 306, Room 101, BARC East, Beltsville, MD 20705, USA
Appl Spectrosc 59:39-46. 2005..However, the results discussed here indicate that at least for some soil types (e. g., large differences in mineralogy or C contents), separate calibrations may be necessary...
- A graphical method to evaluate spectral preprocessing in multivariate regression calibrations: example with Savitzky-Golay filters and partial least squares regressionStephen R Delwiche
USDA ARS, Beltsville Agricultural Research Center, Food Quality Laboratory, Building 303, BARC East, Beltsville, Maryland 20705 2350, USA stephen delwiche ars usda gov
Appl Spectrosc 64:73-82. 2010..The graphical method has application to the evaluation of other preprocess functions and various types of spectroscopy data...
- Pyrolysis of foundry sand resins: a determination of organic products by mass spectrometryRobert S Dungan
USDA ARS, Animal Manure and Byproducts Laboratory, Beltsville, Maryland 20705, USA
J Environ Sci Health A Tox Hazard Subst Environ Eng 40:1557-67. 2005..Because there is interest in beneficially using foundry molding sands in manufactured soils and other agricultural products, it is necessary that organic thermal decomposition products be identified to ensure environmental protection...
- Influence of ash on the fiber composition of dried dairy manuresJames B Reeves
AMBL, ARS, USDA, Beltsville, MD 20705, USA
Environ Pollut 120:239-44. 2002..Also, while the ash content of the dried intact manure can easily be determined, it is difficult to estimate the ash contribution to the individual fiber determinations, especially if sequential assays are performed...
- Near- and mid-infrared diffuse reflectance spectroscopy for measuring soil metal contentGrzegorz Siebielec
Institute of Soil Science and Plant Cultivation, Pulawy, Poland
J Environ Qual 33:2056-69. 2004..Root mean squared deviation (RMSD) values were from 1.27 (Pb) to 3.3 (Ni) times higher for NIRS than for DRIFTS. Results indicate that DRIFTS may be useful for accurate predictions of metals if samples originate from one region...