170,757 research outputs found
Chemical characterization of camelina seed oil:
No full textCamelina sativa (L).Crantz also known as false flax, Dutch flax is an ancient oil seed crop that belongs to the Brassicaceae family. Camelina oil pressed from the seeds of this crop has a unique aroma.
Eighteen camelina oil samples were analyzed for fatty acid composition (13 unrefined, 2 deodorized and 3 refined samples). Eight of these samples were analyzed for unsaponifiables content, free fatty acids and volatiles and semi-volatile compounds. Seven camelina seed samples were analyzed for volatile and semi-volatile compounds as well to determine the suitability of these products in animal feed formulations.
Fatty acid composition was obtained by the trans-esterification of the triacylglycerols in the oil to their methyl esters and 21 different fatty acids with chain length from C-14 to C-24 were identified. The major fatty acids were α-linolenic, linoleic, oleic, eicosenoic and palmitic acid and three fatty acids, namely tricosanoic, pentadecanoic and heptadecanoic are being first reported here.
The unsaponifiables fraction in camelina oil samples ranged between 0.45-0.8% and 21 compounds were identified. The major compounds identified were β-sitosterol, campesterol, cholesterol, phytol, squalene and brassicasterol which accounted for 80-90% of the unsaponifiable content in camelina oil.
A total of 168 and 306 volatile and semi-volatile compounds were identified in the headspace of camelina seeds and oil respectively. Homologous series of lipid oxidation derived compounds like aldehydes, ketones, alcohols, furans and hydrocarbons dominate the aroma and favor profile of the oil and seeds. Sulfur compounds (methyl mercaptan, dimethyl sulfide, dimethyl disulfide and dimethyl trisulfide), naturally occurring 3-alkyl-2-methoxy pyrazines, terpenes, short chain free fatty acids and maillard reaction products were also identified in camelina seeds. The presence of 2-sec-butyl-3-methoxy pyrazine, aldehydes and alcohols (with green notes) and sulfur compounds like 2, 4, 5-trithiahexane and 1-butene-4-isothiocyanato in some camelina oils, may be responsible for the unique aroma of this oil.
The information from this study may potentially be used by camelina oil producers as supporting data for the chemical characteristics of the oil produced in Montana, USA. Camelina oil can serve as a good vegetable source of α-linolenic acid provided it gets the much awaited GRAS certification.M.S.Includes bibliographical references (p. 165-170)by Anusha Sampat
FIGURE 1. Trichoglottis longifolia Atthan., C. Bandara, N.L in Trichoglottis longifolia (Orchidaceae: Epidendroideae: Vandeae: Aeridinae), a new species from Sri Lanka
No full textFIGURE 1. Trichoglottis longifolia Atthan., C. Bandara, N.L. Bandara & Kumar sp. nov. A. Plant habit. B. Front view of flower. C. Side view of flower. Trichoglottis tenera D. Plant habit. E. Front view of flower. F. Side view of flower. Photographs by Anusha Gayan Atthanagoda.Published as part of Bandara, Champika, Atthanagoda, Anusha Gayan, Bandara, Nadeesha Lewke, Ranasinghe, Bhanuka & Kumar, Pankaj, 2022, Trichoglottis longifolia (Orchidaceae: Epidendroideae: Vandeae: Aeridinae), a new species from Sri Lanka, pp. 71-78 in Phytotaxa 567 (1) on page 73, DOI: 10.11646/phytotaxa.567.1.6, http://zenodo.org/record/713801
FIGURE 4. Trichoglottis tenera A. Plant habit. B in Trichoglottis longifolia (Orchidaceae: Epidendroideae: Vandeae: Aeridinae), a new species from Sri Lanka
No full textFIGURE 4. Trichoglottis tenera A. Plant habit. B. Front view of flower. C. Side view of flower. D. Column and labellum. E. Front view of column. F. Bract. G. Dorsal sepals. H1 & H2. Petals. I1 & I2. Lateral sepals. J. Labellum. K. Sagittal section of labellum and spur. L. Leaf. M. Operculum. N. Pollinia. Photographs by Anusha Gayan Atthanagoda.Published as part of Bandara, Champika, Atthanagoda, Anusha Gayan, Bandara, Nadeesha Lewke, Ranasinghe, Bhanuka & Kumar, Pankaj, 2022, Trichoglottis longifolia (Orchidaceae: Epidendroideae: Vandeae: Aeridinae), a new species from Sri Lanka, pp. 71-78 in Phytotaxa 567 (1) on page 76, DOI: 10.11646/phytotaxa.567.1.6, http://zenodo.org/record/713801
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Dataset for: Bubble Plume Integral Model for Line-Source Diffusers in Ambient Stratification
No full textThis dataset includes the source code, scenario simulations, and input and output data used for the simulations of the near-field plume model with line-source geometry in stratification using the Texas A&M Oil Spill Calculator (TAMOC). The model simulations were used to investigate bubble plume behaviour generated from line-source geometry with an integral plume model in stratified ambient reservoirs. This was accomplished by adapting the double-plume integral model developed for point sources to a line plume. This model is based on buoyancy profiles and top-hat velocity and uses an Eulerian integral modeling approach which predicts the chemical, hydrodynamic, and thermodynamic bubble behavior with a discrete bubble model. This dataset supports the publication: Dissanayake Anusha, L., M. Rezvani, A. Socolofsky Scott, A. Bierlein Kevin, and C. Little John (2021). Bubble Plume Integral Model for Line-Source Diffusers in Ambient Stratification. Journal of Hydraulic Engineering, 147(5), 04021015. doi:10.1061/(asce)hy.1943-7900.000188
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
sj-docx-2-msj-10.1177_13524585211051316 – Supplemental material for Depression readmission risk is elevated in multiple sclerosis compared to other chronic illnesses
No full textSupplemental material, sj-docx-2-msj-10.1177_13524585211051316 for Depression readmission risk is elevated in multiple sclerosis compared to other chronic illnesses by Emily M Schorr, Daniel Kurz, Kyle C Rossi, Margaret Zhang, Anusha K Yeshokumar, Nathalie Jette and Mandip S Dhamoon in Multiple Sclerosis Journal</p
An Aluminum Hydride That Functions like a Transition-Metal Catalyst
No full textThe reaction of [LAlH2] (L= HC(CMeNAr)(2), Ar= 2,6-iPr(2)C(6)H(3)) with MeOTf (Tf= SO2CF3) resulted in the formation of [LAlH(OTf)] (1) in high yield. The triflate substituent in 1 increases the positive charge at the aluminum center, which implies that 1 has a strong Lewis acidic character. The excellent catalytic activity of 1 for the hydroboration of organic compounds with carbonyl groups was investigated. Furthermore, it was shown that 1 effectively initiates the addition reaction of trimethylsilyl cyanide (TMSCN) to both aldehydes and ketones. Quantum mechanical calculations were carried out to explore the reaction mechanism
sj-docx-1-msj-10.1177_13524585211051316 – Supplemental material for Depression readmission risk is elevated in multiple sclerosis compared to other chronic illnesses
No full textSupplemental material, sj-docx-1-msj-10.1177_13524585211051316 for Depression readmission risk is elevated in multiple sclerosis compared to other chronic illnesses by Emily M Schorr, Daniel Kurz, Kyle C Rossi, Margaret Zhang, Anusha K Yeshokumar, Nathalie Jette and Mandip S Dhamoon in Multiple Sclerosis Journal</p
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