A 1 H‐NMR spectroscopic method for the analysis of thermolabile chemical markers from the essential oil of black turmeric ( Curcuma caesia ) rhizome: application in post‐harvest analysis

2019 ◽  
Vol 31 (1) ◽  
pp. 28-36 ◽  
Author(s):  
Bhaskar Protim Mahanta ◽  
Dristi Sut ◽  
Phirose Kemprai ◽  
Manabi Paw ◽  
Mohan Lal ◽  
...  
Keyword(s):  
Essential Oil ◽  
Spectroscopic Method ◽  
Chemical Markers ◽  
Post Harvest ◽  
H Nmr

Liquid crystalline polyureas with oligo(ethylene glycol) sequences

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Shahram Mehdipour-Ataei ◽  
Leila Akbarian-Feizi
Keyword(s):  
Liquid Crystalline ◽  
Spectroscopic Method ◽  
Polymerization Reaction ◽  
X Ray Diffraction ◽  
Subsequent Reaction ◽  
Scanning Calorimetry ◽  
Polar Solvents ◽  
X Ray ◽  
H Nmr ◽  
Ft Ir

AbstractA diamine monomer containing ester, amide and ether functional groups was prepared and its polymerization reaction with different diisocyanates to give main chain poly(ester amide ether urea)s was investigated. The monomer was synthesized via reaction of terephthaloyl chloride with 4-hydroxybenzoic acid and subsequent reaction of the resulted diacid with 1,8-diamino-3,6-dioxaoctane. The polymers were characterized by FT-IR and 1H-NMR spectroscopic method and elemental analysis. The resulting polymers exhibited excellent solubility in polar solvents. Crystallinity of the resulted polymers was evaluated by wide-angle X-ray diffraction (WXRD) method, and they exhibited semi-crystalline patterns. The glass transition temperatures (Tg) of the polymers determined by differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA) were in the range of 88-112 °C. The temperatures for 10% weight loss (T10) from their thermogravimetric analysis (TGA) curves were found to be in the range of 297-312 °C in air. Also the prepared polyureas showed liquid crystalline character.

Efficacy of lemongrass essential oil and citral in controlling Callosobruchus maculatus (Coleoptera: Chrysomelidae), a post-harvest cowpea insect pest

2019 ◽  
Vol 119 ◽  
pp. 191-196 ◽  
Author(s):  
Marcela de Souza Alves ◽  
Ivana Mello Campos ◽  
Diego de Mello Conde de Brito ◽  
Cristiane Martins Cardoso ◽  
Emerson Guedes Pontes ◽  
...  
Keyword(s):  
Essential Oil ◽  
Callosobruchus Maculatus ◽  
Insect Pest ◽  
Post Harvest ◽  
Lemongrass Essential Oil

In vitro Propagation and Chemical and Biological Studies of the Essential Oil of Salvia przewalskii Maxim

2007 ◽  
Vol 62 (11-12) ◽  
pp. 839-848 ◽  
Author(s):  
Ewa Skała ◽  
Danuta Kalemba ◽  
Anna Wajs ◽  
Marek Róźalski ◽  
Urszula Krajewska ◽  
...  
Keyword(s):  
Essential Oil ◽  
Shoot Multiplication ◽  
Quantitative Composition ◽  
Human Leukemia ◽  
Qualitative And Quantitative ◽  
H Nmr ◽  
Regenerated Plants ◽  
Biological Studies

The procedure of Salvia przewalskii shoot multiplication and the ability of regenerated plants to produce essential oil is reported. The essential oil was obtained by hydrodistillation from leaves and flowering stems of field-grown plants, and their chemical composition was examined by GC, GC-MS and 1H NMR. The differences in yield as well as qualitative and quantitative composition between the oils isolated from in vitro and in vivo plants were observed. S. przewalskii essential oil was tested for its antimicrobial and cytotoxic properties. It was found that cytotoxicity against human leukemia HL-60 cells and antimicrobial activity (especially, against Staphylococcus aureus and S. epidermidis strains) of oils isolated from in vitro plants were higher than those for oils from in vivo S. przewalskii plants.

Effect of Post Harvest Drying Methods on the Essential Oil Composition of Nardostachys jatamansi DC.

2017 ◽  
Vol 20 (4) ◽  
pp. 1090-1096 ◽  
Author(s):  
Rajendra S. Chauhan ◽  
M. C. Nautiyal ◽  
Gilles Figueredo ◽  
V. S. Rana
Keyword(s):  
Essential Oil ◽  
Essential Oil Composition ◽  
Drying Methods ◽  
Oil Composition ◽  
Post Harvest ◽  
Nardostachys Jatamansi

Post‐harvest management control of Ectomyelois ceratoniae (Zeller) (Lepidoptera: Pyralidae): new insights through essential oil encapsulation in cyclodextrin

2019 ◽  
Vol 75 (7) ◽  
pp. 2000-2008 ◽  
Author(s):  
Maha Ben Abada ◽  
Soumaya Haouel Hamdi ◽  
Riham Gharib ◽  
Chokri Messaoud ◽  
Sophie Fourmentin ◽  
...  
Keyword(s):  
Essential Oil ◽  
Management Control ◽  
Harvest Management ◽  
Ectomyelois Ceratoniae ◽  
Post Harvest ◽  
Lepidoptera Pyralidae

scholarly journals A Chemical Marker Proposal for the Lantana genus: Composition of the Essential Oils from the Leaves of Lantana radula and L. canescens

2010 ◽  
Vol 5 (4) ◽  
pp. 1934578X1000500
Author(s):  
José G. Sena Filho ◽  
Haroudo S. Xavier ◽  
José M. Barbosa Filho ◽  
Jennifer M. Duringer
Keyword(s):  
Quality Control ◽  
Chemical Analysis ◽  
Essential Oil ◽  
Essential Oils ◽  
The Other ◽  
Chemical Markers ◽  
Chemical Marker ◽  
High Concentration ◽  
Minor Compounds ◽  
Prior Analysis

Essential oil extracts from the leaves of two Lantana species ( L. radula Sw. and L. canescens Kunth), for which no prior analysis has been reported, were analyzed by GC-MS. This information was utilized to propose chemical markers for Lantana species so that identification between physically similar plant species can be achieved through chemical analysis. Results showed 33 constituents for L. canescens, among which β-caryophyllene (43.9%), β-cubebene (10.1%), elixene (8.6%), β-phellandrene (6.1%), α-caryophyllene (2.6%) and dehydro-aromadendrene (2.6%) were the principle components. L. radula revealed the presence of 21 compounds, the most abundant of which were β-cubebene (31.0%), β-caryophyllene (20.8%), elixene (10.0%), α-salinene (6.4%), β-phellandrene (6.1%), copaene (4.9%) cadinene (1.4%) and psi-limonene (1.4%). The high concentration of β-caryophyllene in the samples tested here and those in the literature make it a good candidate for a chemical marker for Lantana species, with β-cubebene, elixene and β-phellandrene following as minor compounds identified more sporadically in this genus. On the other hand, Lippia species, which are morphologically similar to those from the Lantana genus, would contain limonene, citral, carvacrol, β-myrcene, camphor and thymol as the main chemical markers. These chemical markers would be a powerful tool for maintaining quality control in the extraction of essential oils for use in medicinal applications, as well as in identification of plant specimens to a taxonomist.

Fungitoxicity of the essential oil of Citrus sinensis on post-harvest pathogens

2006 ◽  
Vol 22 (6) ◽  
pp. 587-593 ◽  
Author(s):  
Neeta Sharma ◽  
Abhishek Tripathi
Keyword(s):  
Essential Oil ◽  
Citrus Sinensis ◽  
Post Harvest

Schinus terebinthifolius Raddi ESSENTIAL OIL AS ALTERNATIVE CONTROL Colletothrichum gloeosporioides and Lasiodiplodia theobromae, FUNGI OF pathogenic POST-HARVEST

2014 ◽  
Vol 4 (4) ◽  
pp. 1409-1417 ◽  
Author(s):  
I. T. B. F. SANTOS ◽  
T. S. SANTOS ◽  
F. L. S. SILVA ◽  
P. R. GAGLIARDI ◽  
L. F. G. OLIVEIRA JÚNIOR ◽  
...  
Keyword(s):  
Essential Oil ◽  
Alternative Control ◽  
Schinus Terebinthifolius ◽  
Lasiodiplodia Theobromae ◽  
Post Harvest

scholarly journals Efficacy of the Application of A Coating Composed of Chitosan and Mentha Piperita Essential Oil To Control of Post-Harvest Fungal Pathogens in Tomatoes (Lycopersicum Esculentum)

2014 ◽  
Author(s):  
Ingrid Conceição Dantas Guerra ◽  
Rayssa Julliane de Carvalho ◽  
Estefânia Fernandes Garcia ◽  
Marta Suely Madruga ◽  
Priscila Dinah Lima Oliveira ◽  
...  
Keyword(s):  
Essential Oil ◽  
Fungal Pathogens ◽  
Mentha Piperita ◽  
Lycopersicum Esculentum ◽  
Post Harvest

scholarly journals Effect of Active Packaging Material Fortified with Clove Essential Oil on Fungal Growth and Post-Harvest Quality Changes in Table Grape during Cold Storage

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3445
Author(s):  
Siriporn Luesuwan ◽  
Matchima Naradisorn ◽  
Khursheed Ahmad Shiekh ◽  
Pornchai Rachtanapun ◽  
Wirongrong Tongdeesoontorn
Keyword(s):  
Essential Oil ◽  
Fungal Growth ◽  
Diffusion Method ◽  
Disk Diffusion Method ◽  
Post Harvest ◽  
Table Grapes ◽  
Pleasant Odor ◽  
Clove Essential Oil ◽  
Aspergillus Sp ◽  
Acceptance Score

Fungal growth in table grapes (Vitis vinifera cv. beauty seedless) is triggered by Botrytis cinerea, Penicillium sp., Aspergillus sp., and Rhizopus stolonifera during post-harvest storage. Due to the safety aspects, this research aimed to develop antifungal packaging embedded with essential oils (EOs) to alleviate the fungal decay of table grapes (TG). The various levels of EOs (0.5–5%, v/v) from clove, cinnamon, thyme, peppermint, lemon, bergamot, ginger, spearmint, and lemongrass were tested against Aspergillus sp. The results attained in radial growth, disk diffusion method, minimal inhibitory concentration, and minimal fungicidal concentration revealed that 1% clove essential oil (CEO) showed higher efficacy against Aspergillus sp. compared to the untreated control and other treatments. CEO at the 1% level exhibited a pleasant odor intensity in TG than the other EOs. The active polyvinyl alcohol (7% PVA) film with 1% CEO resulted in lower weight loss, disease severity, and TG berry drop than the control and other treated samples. Additionally, the acceptance score in the TG sample wrapped with a PVA film containing 1% CEO was augmented. Therefore, the PVA film with 1% CEO retarded the fungal growth and prolonged the shelf life of TG during storage of 21 days at 13 °C and 75% relative humidity (RH).

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