Topic
Mason jar
About: Mason jar is a research topic. Over the lifetime, 32 publications have been published within this topic receiving 382 citations. The topic is also known as: Ball jar & fruit jar.
Papers
TL;DR: In this paper, the authors used a 473-mL (1-pint) widemouth Mason jar to liberate NH 4 -N, NO 3 -N and/or NO 2 -N as NH 3.
Abstract: The major limitation of diffusion methods for N analysis is the time required to obtain the results - typically from one to several days. Methods were developed that involve a much shorter period for diffusion. In these methods, 10- to 100-mL samples of 2 or 4 M KCl soil extract or water were treated with MgO, or MgO plus Devarda's alloy, in a 473-mL (1-pint) wide-mouth Mason jar to liberate NH 4 -N, NO 3 -N, and/or NO 2 -N as NH 3 . The jar was placed on an electric griddle maintained at 45 to 50°C. Gaseous NH 3 was collected in 5 mL of H 3 BO 3 indicator solution in a petri dish attached to the Mason jar lid, for quantitative determination by acidimetric titration. Complete recovery of 4 mg of N was achieved from 10 or 20 mL in 1.5 to 5 h. Recovery from 50 or 100 mL was complete in 5 to 8.5 h with 1 to 2 mg of N. The methods permit 15 N analysis of the diffused NH3-N. Isotopic analyses of labeled soil extracts were accurate to within 3%, as determined by isotope-dilution calculations. Diffusions from 10 to 50 mL were subject to very little, if any, interference from decomposition of alkali-labile organic-N compounds.
105 citations
TL;DR: In this paper, simple microdiffusion methods were evaluated for Nisotope analysis of NH4 +, NO3 ‐, and NO2 ‐ in soil extracts, and the results showed that NH4+N and NO3+N were within 2% of the corresponding values calculated by isotope-dilution equations.
Abstract: Simple microdiffusion methods were evaluated for N‐isotope analysis of NH4 +, NO3 ‐, and NO2 ‐ in soil extracts. In these methods, the soil extract is treated with MgO or MgO and Devarda's alloy in a 473‐mL (1‐pint) wide‐mouth Mason jar, the NH3 liberated being collected in a Petri dish containing 3 mL of boric acid‐indicator solution, or in an acidified glass‐fiber disk, suspended from the Mason‐jar lid. To avoid cross‐contamination error from retention of 15N, the lid was immersed in 0.05 M KOH for at least 24 h before reuse. Serious error occurred when NO3 ‐‐N was diffused following NH4 +‐N; therefore, separate diffusions should be performed for NH4 +‐N and (NH4 + + NO3‐)‐N or (NH4 + + NO3‐ + NO2‐)‐N. In studies to evaluate the latter approach using labeled soil extracts, analyses for 15N were within 2% of the corresponding values calculated by isotope‐dilution equations. No interference by alkali‐labile organic N was observed in diffusion of 15N‐labeled extracts from soil receiving various tr...
76 citations
TL;DR: Using a 5–8% CO2 atmosphere substantially improved embryonic survivability in avian egg contents removed from the shell after 72 hours of normal incubation.
56 citations
TL;DR: The size of vessel used influenced the in vitro proliferation of grapevines in liquid culture, and jars yielded the greatest number of shoots 7 mm or longer, followed by 250 ml, then 125 ml flasks.
Abstract: The in vitro proliferation of Vitis vinifera L. cv. Liemberger in a liquid medium was compared in 125 and 250 ml Erlenmeyer flasks and in 473 ml (pint) Mason jars. After 6 weeks of culture the jars yielded a significantly greater number of shoots 3 mm or longer than the flasks. Jars yielded the greatest number of shoots 7 mm or longer, followed by 250 ml, then 125 ml flasks. The mean length of shoots in the 250 ml flasks was significantly greater than that of shoots in 125 ml flasks. The final mean fresh weight of the cultures in jars was significantly less than that of the cultures in flasks. Thus the size of vessel used influenced the in vitro proliferation of grapevines in liquid culture.
50 citations
TL;DR: Simple methods are described that permit the use of either H3BO3 indicator solution or acidified filter disks to collect NH3 liberated by treatment of Kjeldahl digests with NaOH, which were within 3% of analyses using steam distillation.
Abstract: Simple methods are described that permit the use of either H 3 BO 3 indicator solution or acidified filter disks to collect NH 3 liberated by treatment of Kjeldahl digests with NaOH. These methods incorporate modifications to improve reliability, analytical capacity, and convenience. A semimicro digest was diluted to 25 mL with deionized water, and a 10 mL aliquot, containing up to 4 mg N (150 μg N for diffusions into acidified disks), was transferred to a shell vial, which was placed inside a 473 mL (1 pint) Mason jar containing 10 mL 10N NaOH. The NH 3 liberated by overturning the vial was collected after 12 to 48 h at ambient temperature, or after 4 h at 45 to 50°C on a hotplate, for quantitative andlor isotope-ratio analyses. With either H 3 BO 3 indicator solution or acidified filter disks, recovery of diffused N was quantitative. Isotope-ratio analyses of diffused N from 15 N-labeled chemical, plant, and soil samples were within 3% of analyses using steam distillation.
42 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 3 |
| 2018 | 2 |
| 2017 | 1 |
| 2016 | 4 |
| 2015 | 2 |
| 2014 | 1 |