Total Protein Content Determination of Microalgal Biomass by Elemental Nitrogen Analysis and a Dedicated Nitrogen-to-Protein Conversion Factor

2018 ◽  
pp. 233-242 ◽  
Author(s):  
L. M. L. Laurens ◽  
J. L. Olstad ◽  
D. W. Templeton
Keyword(s):  
Protein Content ◽  
Total Protein ◽  
Conversion Factor ◽  
Total Protein Content ◽  
Microalgal Biomass ◽  
Content Determination

Retardation Signal for Fluorescent Determination of Total Protein Content via Rapid and Sensitive Chip Moving Reaction Boundary Electrophoretic Titration

2014 ◽  
Vol 86 (6) ◽  
pp. 2888-2894 ◽  
Author(s):  
Houyu Wang ◽  
Yongting Shi ◽  
Jian Yan ◽  
Jingyu Dong ◽  
Si Li ◽  
...  
Keyword(s):  
Protein Content ◽  
Total Protein ◽  
Total Protein Content

Effect of harvest period on the protein content in sea buckthorn leaves

2003 ◽  
Vol 83 (2) ◽  
pp. 409-410 ◽  
Author(s):  
T. S. C. Li ◽  
D. Wardle
Keyword(s):  
Protein Content ◽  
Total Protein ◽  
Freeze Drying ◽  
Conversion Factor ◽  
Growing Season ◽  
Sea Buckthorn ◽  
Leaf Protein ◽  
Total Protein Content ◽  
Male And Female ◽  
Freeze Dried

A study was conducted at Summerland, BC, in 2000 and 2001 to investigate the effect of harvest period on the protein content of sea buckthorn leaves. Leaves of both male and female plants were collected bi-weekly during the growing season and analyzed with a LECO FP-528 nitrogen analyzer after air- and freeze-drying. A conversion factor of kA = 5.7 was applied to obtain the protein content. Total protein content in sea buckthorn leaves showed very small differences between male and female plants and from either freeze-dried or air-dried materials. There were significant fluctuations among harvest periods in both years. Based on the results of this experiment, sea buckthorn leaves should be harvested from late July to early August since leaf protein content peaked around this period of time and started to decline significantly by the middle of August. Key words: Sea buckthorn, Hippophae rhamnoides L., leaf protein

scholarly journals A Reassessment of the in vitro total protein content determination (TPC) with SIRC and 3T3 cells for the evaluation of the ocular irritation potential of shampoos: comparison with the in vivo Draize rabbit test

2011 ◽  
Vol 54 (6) ◽  
pp. 1135-1146 ◽  
Author(s):  
Rodrigo Netto Costa ◽  
Clarice Lima do Canto Abreu ◽  
Rosaura Farias Presgrave ◽  
Eloisa Nunes Alves ◽  
Octavio Augusto França Presgrave ◽  
...  
Keyword(s):  
Protein Content ◽  
Total Protein ◽  
Total Protein Content ◽  
3T3 Cells ◽  
Ocular Irritation ◽  
Content Determination

scholarly journals Analysis of Fatty acid and Determination of Total Protein, Alkaloid, Saponin, Flavonoid of Bangladeshi Bombax ceiba Linn Leaves and Seeds

2016 ◽  
Vol 4 (04) ◽  
pp. 23-28
Author(s):  
Shahin Aziz ◽  
Shahal Ahmed ◽  
Sharmin Akter Lisa ◽  
Tanzima Parvin
Keyword(s):  
Fatty Acid ◽  
Protein Content ◽  
Total Protein ◽  
Petroleum Ether Extract ◽  
Folk Medicine ◽  
Fatty Acid Analysis ◽  
Total Protein Content ◽  
Saponin Content ◽  
Kjeldahl Method

Bombax ceiba Linn belongs to the family of Bombacaceae and is an important medicinal plant. In Bangladesh, Bombax ceiba Linn is locally known as “Shimul tree”. The whole part of the plant used as traditional folk medicine for the treatment of antidysentric, anti diahorreal and antipyretic effects. The present communication attempts to evaluate fatty acid analysis by GC-MS spectrophotometer, total protein content by Kjeldahl method and to quantify some active constituents i.e. alkaloid, saponin and flavonoid. The fatty acid compositions of the petroleum ether extract of leaves and seeds of Bombax ceiba grown in Bangaladesh were determined by gas chromatography- mass spectrophotometer. 8 compounds were identified from leaves and 13 compounds were identified from the seeds. For both cases Palmitic acid showed higher value. The findings from present study showed the protein content for seeds have higher value (18.89%) than leaves of Bombax ceiba . The present investigation showed that both leaves and seeds of Bombax ceiba contain phytochemicals such as flavanoids, alakaloids and saponins in appreciable quantities. The flavonoid content of leaves was 5.97% and for the case of seeds (5.72%), the alkaloid content for leaves was (9.73%) and for seeds (31.44), the saponin content for the case of leaves (13.90%) and for the case of seeds was(43.58%).

Determination of total protein content in soya-bean milk via visual moving reaction boundary titration

2013 ◽  
Vol 31 (11) ◽  
pp. 1064 ◽  
Author(s):  
Chengye GUO ◽  
Houyu WANG ◽  
Lei ZHANG ◽  
Liuyin FAN ◽  
Chengxi CAO
Keyword(s):  
Protein Content ◽  
Total Protein ◽  
Soya Bean ◽  
Total Protein Content

scholarly journals Colorimetric determination of total protein content in serum based on the polydopamine/protein adsorption competition on microplates

Talanta ◽  
2019 ◽  
Vol 198 ◽  
pp. 15-22 ◽  
Author(s):  
Pasquale Palladino ◽  
Alvaro Brittoli ◽  
Emanuela Pascale ◽  
Maria Minunni ◽  
Simona Scarano
Keyword(s):  
Protein Content ◽  
Protein Adsorption ◽  
Total Protein ◽  
Total Protein Content ◽  
Colorimetric Determination

Amino acid composition, protein content and accurate nitrogen-to-protein conversion factor for sheepgrass (Leymus chinensis)

Botany ◽  
2020 ◽  
Vol 98 (3) ◽  
pp. 137-146 ◽  
Author(s):  
Qingfen Zhang ◽  
Dongmei Qi ◽  
Xiaobing Dong ◽  
Xiaoxia Li ◽  
Liqin Cheng ◽  
...  
Keyword(s):  
Amino Acid ◽  
Amino Acid Composition ◽  
Protein Content ◽  
Acid Composition ◽  
Total Nitrogen ◽  
Total Protein ◽  
Conversion Factor ◽  
Leymus Chinensis ◽  
Total Protein Content ◽  
Protein Nitrogen

The protein content of plants is commonly estimated by multiplying the total nitrogen content (Kjeldahl; KN) by a nitrogen-to-protein conversion factor of 6.25. This method is based on the incorrect assumption that all nitrogen in the ammonia/ammonium and organic substances in plants is protein nitrogen, usually resulting in overestimation of protein content. We have examined amino acid composition, amino acid nitrogen, total nitrogen (KN), and actual protein content (AP) determined from amino acid residues in 16 accessions of perennial sheepgrass (Leymus chinensis (Trin.) Tzvelev). We determined a new nitrogen-to-protein conversion factor, kP, as the ratio of AP to KN, and applied this factor to estimate the total protein content (TP) as KN × kP. The non-protein nitrogen accounted for 40.5% to 62.4% of the total nitrogen. The average kP value was 3.17 overall, 3.20 in the accessions sampled at the jointing stage, and 3.15 in the accessions sampled at the flowering stage. The TP, calculated as KN × 3.17, was about half that of crude protein contents, calculated as KN × 6.25. Our study suggests that the AP-based kP of 3.17 can be used to more accurately estimate the total protein content in sheepgrass.

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