METHOD OF MEASURING NITROGEN IN SAMPLE BY KJELDAHL PRINCIPLE AND CATALYST THEREFORSUTEEN RUUPAATO KURISUTOFUAASEOORE KURISUCHIYAN BIYAAN
Simulated nitrogen uptake of maize as influenced by nitrogen management options under long-term contrasting tillage practices in 2019 (a), 2020 (b) and 2021 (c). Full size image Ammonia volatilization In this and following section, we only looked at simulated data and the discussion is based ...
Measurement of total nitrogen by Kjeldahl analysis is the historical reference method for determination of the protein content of dairy products and is used for both calibration and validation of alternative methods for protein determination. Accurate evaluation of alternative methods is not possible if ...
Taxonomy and nitrogen biogeochemistry were the prominent research interests for the first two periods, respectively, while stable isotopic tracking of nitrogen and phosphorus processes emerged as the dominant research focus for the last two decades. The integration of macroeconomic factors in research ...
Our data indicate that the difference of the TN by the two methods can serve as an independent climatic proxy. 展开 关键词: soil lake sediment nitrogen Kjeldahl method elemental analyzer method nitrogen cycle DOI: 10.1007/s11442-006-0415-5 被引量: 21 ...
Estimated 1-repetition maximum (1RM) in bench press, leg press, lateral pull-down and hip thruster were performed in weeks -1, 0, 3 and 15 using the Brzycki multiple repetition testing procedure [44]. To control exercise as a confounder, participants engaged in 14 weeks of supervised ...
with overall availability of nutrients6, and of specific nutrients such as nitrogen (N)7, potassium (K)8, and phosphorus (P)9. The theory of fluctuating resource availability6proposes that the invasibility of a plant community increases as resource availability increases. Due to the fact that ...
American Standard Methods ASTM E258, "Standard Test Method for Total Nitrogen in Organic Materials by Modified Kjeldahl Method", 3pp. (1967).ASTM E 258-67 (Reapproved 1987). Standard test method for total nitrogen in organic materials by modified kjeldahl method. American Society for Testing ...
Crude protein was estimated as TN × 6.38. To allow comparison of methods, Kjeldahl-CP results were converted to a DM basis using DM as determined by the reference drying method (see Eisert et al., 2013 for unconverted Kjeldahl results). The accuracy of TN determination by both methods was...
Estimated urinary volume, and urinary excretion of urea-N (g/d and % of N intake) and total-N (g/d) increased linearly in response to RP-His. In contrast, supplemental RP-His did not affect the output of urea-N expressed as a proportion of total urinary-N excretion (mean = 68.4%)...