scholarly journals Reassessment of the structural composition of the alkenone distributions in natural environments using an improved method for double bond location based on GC-MS analysis of cyclopropylimines

2006 ◽  
Vol 17 (5) ◽  
pp. 710-720 ◽  
Author(s):  
Jordi F. López ◽  
Joan O. Grimalt
Keyword(s):  
Double Bond ◽  
Natural Environments ◽  
Improved Method ◽  
Structural Composition ◽  
Ms Analysis

scholarly journals Carbon–carbon double bond position elucidation in fatty acids using ozone-coupled direct analysis in real time mass spectrometry

The Analyst ◽  
2019 ◽  
Vol 144 (19) ◽  
pp. 5848-5855 ◽  
Author(s):  
Nicolas Cetraro ◽  
Robert B. Cody ◽  
Joanne Y. Yew
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acids ◽  
Double Bond ◽  
Real Time ◽  
Direct Analysis ◽  
Double Bond Position ◽  
Carbon Double Bond ◽  
Ms Analysis

Ozonolysis combined with DART MS analysis provides a facile method for the identification of double bond position in lipids.

An Improved Method of UPLC-PDA-MS/MS Analysis of Lycopene Isomers

2015 ◽  
Vol 8 (8) ◽  
pp. 1962-1969 ◽  
Author(s):  
Bangalore Prabhashankar Arathi ◽  
Poorigali Raghavendra Rao Sowmya ◽  
Kariyappa Vijay ◽  
Pullancheri Dilshad ◽  
Bhattacharya Saikat ◽  
...  
Keyword(s):  
Improved Method ◽  
Ms Analysis

scholarly journals An improved method to estimate pigeon populations in urban areas

2018 ◽  
Vol 10 (1) ◽  
Author(s):  
Zaidett Barrientos ◽  
Carolina Seas
Keyword(s):  
Coefficient Of Variation ◽  
Urban Areas ◽  
Columba Livia ◽  
Natural Environments ◽  
Improved Method ◽  
Point Counts ◽  
The World ◽  
Sampling Points ◽  
Evaluation Of Methods

The Rock Pigeon, Columba livia, is rare in natural environments but extremely successful in urban areas all over the world. Management programs are important because it is considered a pest in many cities. Nevertheless, no appropriate evaluation of methods to estimate urban pigeon populations is available in the literature. We compared three methods: a) the frequently used Stratified grids; b) Point counts, i.e. total pigeon counts with a mechanic counter in sampling points with a 50m radius; and c) Panoramas, 360o panoramic photographs. In nine urban parks in central Costa Rica, we made 1350 counts in total and compared: coefficient of variation (to assess precision); accuracy; time counting or taking photographs in situ; time merging photographs, counting pigeons in photographs, or typing data; and advantages or disadvantages. The Panorama Method is cheap, precise, accurate, secure, fast and easy. It can be used as an indicator or to estimate the actual population.

An Improved Method for Preparing Dimethyl Disulfide Adducts for GC/MS Analysis

2007 ◽  
Vol 85 (1) ◽  
pp. 93-94 ◽  
Author(s):  
Akira Shibahara ◽  
Kouhei Yamamoto ◽  
Akemi Kinoshita ◽  
Barbara L. Anderson
Keyword(s):  
Dimethyl Disulfide ◽  
Improved Method ◽  
Ms Analysis

scholarly journals Improved Method Supporting Maldi-Ms Analysis of Sialyloligosaccharides Including Their Structural Isomers

2020 ◽  
Vol 118 (3) ◽  
pp. 622a
Author(s):  
Takashi Terabayashi ◽  
Kenji Fukuda ◽  
Minoru Morita ◽  
Tadasu Urashima
Keyword(s):  
Maldi Ms ◽  
Improved Method ◽  
Structural Isomers ◽  
Ms Analysis

Engineering of melanin biopolymer by co-expression of MelC tyrosinase with CYP102G4 monooxygenase: Structural composition understanding by 15 tesla FT-ICR MS analysis

2020 ◽  
Vol 157 ◽  
pp. 107530 ◽  
Author(s):  
HyunA Park ◽  
Inchan Yang ◽  
Mira Choi ◽  
Kyoung-Soon Jang ◽  
Ji Chul Jung ◽  
...  
Keyword(s):  
Structural Composition ◽  
Ms Analysis ◽  
Ft Icr Ms ◽  
Ft Icr

Effect of Iron Limitation on the Ultrastructure of Agmenellum Quadruplicatum

1981 ◽  
Vol 39 ◽  
pp. 410-411
Author(s):  
L. P. Hardie ◽  
D. L. Balkwill ◽  
S. E. Stevens
Keyword(s):  
Growth Medium ◽  
Green Alga ◽  
Natural Habitat ◽  
Iron Limitation ◽  
Natural Environments ◽  
Blue Green Alga ◽  
Marine Cyanobacterium ◽  
Natural Systems ◽  
Thin Sectioning ◽  
Agmenellum Quadruplicatum

Agmenellum quadruplicatum is a unicellular, non-nitrogen-fixing, marine cyanobacterium (blue-green alga). The ultrastructure of this organism, when grown in the laboratory with all necessary nutrients, has been characterized thoroughly. In contrast, little is known of its ultrastructure in the specific nutrient-limiting conditions typical of its natural habitat. Iron is one of the nutrients likely to limit this organism in such natural environments. It is also of great importance metabolically, being required for both photosynthesis and assimilation of nitrate. The purpose of this study was to assess the effects (if any) of iron limitation on the ultrastructure of A. quadruplicatum. It was part of a broader endeavor to elucidate the ultrastructure of cyanobacteria in natural systemsActively growing cells were placed in a growth medium containing 1% of its usual iron. The cultures were then sampled periodically for 10 days and prepared for thin sectioning TEM to assess the effects of iron limitation.

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