Similar Odor Research Articles

Structure-odor relationships of linalool, linalyl acetate and their corresponding oxygenated derivatives.

Linalool 1 is an odorant that is commonly perceived as having a pleasant odor, but is also known to elicit physiological effects such as inducing calmness and enhancing sleep. However, no comprehensive studies are at hand to show which structural features are responsible for these prominent effects. Therefore, a total of six oxygenated derivatives were synthesized from both 1 and linalyl acetate 2, and were tested for their odor qualities and relative odor thresholds (OTs) in air. Linalool was found to be the most potent odorant among the investigated compounds, with an average OT of 3.2 ng/L, while the 8-hydroxylinalool derivative was the least odorous compound with an OT of 160 ng/L; 8-carboxylinalool was found to be odorless. The odorant 8-oxolinalyl acetate, which has very similar odor properties to linalool, was the most potent odorant besides linalool, exhibiting an OT of 5.9 ng/L. By comparison, 8-carboxylinalyl acetate had a similar OT (6.1 ng/L) as its corresponding 8-oxo derivative but exhibited divergent odor properties (fatty, greasy, musty). Overall, oxygenation on carbon 8 had a substantial effect on the aroma profiles of structural derivatives of linalool and linalyl acetate.

Habituation of glomerular responses in the olfactory bulb following prolonged odor stimulation reflects reduced peripheral input.

Following prolonged odor stimulation, output from olfactory bulb (OB) mitral/tufted (M/T) cells is decreased in response to subsequent olfactory stimulation. Currently, it is unclear if this decrease is a function of adaptation of peripheral olfactory sensory neuron (OSN) responses or reflects depression of bulb circuits. We used wide-field calcium imaging in anesthetized transgenic GCaMP2 mice to compare excitatory glomerular layer odor responses before and after a 30-s odor stimulation. Significant habituation of subsequent glomerular odor responses to both the same and structurally similar odorants was detected with our protocol. To test whether depression of OSN terminals contributed to this habituation, olfactory nerve layer (ON) stimulation was used to drive glomerular layer responses in the absence of peripheral odor activation of the OSNs. Following odor habituation, in contrast to odor-evoked glomerular responses, ON stimulation-evoked glomerular responses were not habituated. The difference in response between odor and electrical stimulation following odor habituation provides evidence that odor response reductions measured in the glomerular layer of the OB are most likely the result of OSN adaptation processes taking place in the periphery.

Effect of Hydrocolloids on Quality of Proso Millet Cookie

The absence of gluten in proso millet offers difficulty to shape the dough for the preparation of products. The effects of hydrocolloids like gum acacia, guar gum, xanthan gum, carboxymethylcellulose (CMC) and hydroxypropylmethylcellulose (HPMC), and the thermal treatment of proso millet flour and doughs on cookie-making quality were studied. The product attributes that were determined included the sensory and textural properties of the product and compared them with the wheat cookie. Thermal treatment, as well as the addition of hydrocolloids markedly, changed the product qualities. Xanthan and guar gum-added doughs exhibited high instrumental adhesiveness and sensory stickiness which were undesirable for obtaining the appropriate shape of a cookie. The product made from untreated proso millet flour (PMF) showed the highest mass per unit piece followed by the refined wheat flour (RWF) product; the lowest mass and soft texture were displayed by the products made from the CMC and HPMC. The principal component analysis of the results indicated that untreated PMF and RWF products were placed in the opposite quadrants to behave in a different manner. The sensory quality of the product prepared with untreated PMF was inferior to that of the control sample and was not acceptable to sensory judges. The HPMC- and CMC-added products were distinctly different with respect to their volatile quality as per the e-nose analysis. The treated PMF with gum acacia-added product had the similar odour characteristics and were closely associated with firmness and overall quality to match the wheat product and also were best suited for dough-handling purpose.

Is it possible to rapidly and noninvasively identify different plants from Asteraceae using electronic nose with multiple mathematical algorithms?

Many plants originating from the Asteraceae family are applied as herbal medicines and also beverage ingredients in Asian areas, particularly in China. However, they may be confused due to their similar odor, especially when ground into powder, losing their typical macroscopic characteristics. In this paper, 11 different multiple mathematical algorithms, which are commonly used in data processing, were utilized and compared to analyze the electronic nose (E-nose) response signals of different plants from Asteraceae family. Results demonstrate that three-dimensional plot scatter figure of principal component analysis with less extracted components could offer the identification results more visually; simultaneously, all nine kinds of artificial neural network could give classification accuracies at 100%. This paper presents a rapid, accurate, and effective method to distinguish Asteraceae plants based on their response signals in E-nose. It also gives insights to further studies, such as to find unique sensors that are more sensitive and exclusive to volatile components in Chinese herbal medicines and to improve the identification ability of E-nose. Screening sensors made by other novel materials would be also an interesting way to improve identification capability of E-nose.

Olfactory discrimination and generalization of ammonium nitrate and structurally related odorants in Labrador retrievers

A critical aspect of canine explosive detection involves the animal's ability respond to novel, untrained odors based on prior experience with training odors. In the current study, adult Labrador retrievers (N=15) were initially trained to discriminate between a rewarded odor (vanillin) and an unrewarded odor (ethanol) by manipulating scented objects with their nose in order to receive a food reward using a canine-adapted discrimination training apparatus. All dogs successfully learned this olfactory discrimination task (≥80% correct in a mean of 296 trials). Next, dogs were trained on an ammonium nitrate (AN, NH4NO3) olfactory discrimination task [acquired in 60-240 trials, with a mean (±SEM) number of trials to criterion of 120.0±15.6] and then tested for their ability to respond to untrained ammonium- and/or nitrate-containing chemicals as well as variants of AN compounds. Dogs did not respond to sodium nitrate or ammonium sulfate compounds at rates significantly higher than chance (58.8±4.5 and 57.7±3.3% correct, respectively). Transfer performance to fertilizer-grade AN, AN mixed in Iraqi soil, and AN and flaked aluminum was significantly higher than chance (66.7±3.2, 73.3±4.0, 68.9±4.0% correct, respectively); however, substantial individual differences were observed. Only 53, 60, and 64% of dogs had a correct response rate with fertilizer-grade AN, AN and Iraqi soil, and AN and flaked aluminum, respectively, that were greater than chance. Our results suggest that dogs do not readily generalize from AN to similar AN-based odorants at reliable levels desired for explosive detection dogs and that performance varies significantly within Labrador retrievers selected for an explosive detection program.

Evaluation of the effect of fenhexamid and mepanipyrim in the volatile composition of Tempranillo and Graciano wines

Grapes from Vitis vinifera var. Tempranillo and Graciano of La Rioja (North Central Spain) were vinified after addition of two fungicides (mepanipyrim and fenhexamid) at concentrations corresponding to their MRLs. These fungicides are commonly used in the vine growing to control botrytis disease. The fungicide effect throughout winemaking on the volatile composition and aroma profile of the final wines was evaluated, together with the level of fungicide residues in the final wines that were found to be safe for consumers. Concentrations of C13-norisoprenoids in Graciano wines obtained after the addition of both active substances showed the greatest variations with respect to control wine; whereas the concentration of volatile compounds in Tempranillo wines were seemingly unaffected by the presence of fungicide residues. On the other hand, the aroma profile of monovarietal red wines was evaluated by using odorant series which included volatile compounds with similar odour descriptors. In this sense, supplementation with the antifungals seemed to increase the OAV for the ripe fruit series with respect to the control wines in Graciano wines.

Research on odor interaction between aldehyde compounds via a partial differential equation (PDE) model.

In order to explore the odor interaction of binary odor mixtures, a series of odor intensity evaluation tests were performed using both individual components and binary mixtures of aldehydes. Based on the linear relation between the logarithm of odor activity value and odor intensity of individual substances, the relationship between concentrations of individual constituents and their joint odor intensity was investigated by employing a partial differential equation (PDE) model. The obtained results showed that the binary odor interaction was mainly influenced by the mixing ratio of two constituents, but not the concentration level of an odor sample. Besides, an extended PDE model was also proposed on the basis of the above experiments. Through a series of odor intensity matching tests for several different binary odor mixtures, the extended PDE model was proved effective at odor intensity prediction. Furthermore, odorants of the same chemical group and similar odor type exhibited similar characteristics in the binary odor interaction. The overall results suggested that the PDE model is a more interpretable way of demonstrating the odor interactions of binary odor mixtures.

Learning modulation of odor representations: new findings from Arc-indexed networks.

We first review our understanding of odor representations in rodent olfactory bulb (OB) and anterior piriform cortex (APC). We then consider learning-induced representation changes. Finally we describe the perspective on network representations gained from examining Arc-indexed odor networks of awake rats. Arc-indexed networks are sparse and distributed, consistent with current views. However Arc provides representations of repeated odors. Arc-indexed repeated odor representations are quite variable. Sparse representations are assumed to be compact and reliable memory codes. Arc suggests this is not necessarily the case. The variability seen is consistent with electrophysiology in awake animals and may reflect top-down cortical modulation of context. Arc-indexing shows that distinct odors share larger than predicted neuron pools. These may be low-threshold neuronal subsets. Learning’s effect on Arc-indexed representations is to increase the stable or overlapping component of rewarded odor representations. This component can decrease for similar odors when their discrimination is rewarded. The learning effects seen are supported by electrophysiology, but mechanisms remain to be elucidated.

Distinct roles of bulbar muscarinic and nicotinic receptors in olfactory discrimination learning.

The olfactory bulb (OB) and piriform cortex receive dense cholinergic projections from the basal forebrain. Cholinergic modulation within the piriform cortex has long been proposed to serve important functions in olfactory learning and memory. We here investigate how olfactory discrimination learning is regulated by cholinergic modulation of the OB inputs to the piriform cortex. We examined rats' performance on a two-alternative choice odor discrimination task following local, bilateral blockade of cholinergic nicotinic and/or muscarinic receptors in the OB. Results demonstrate that acquisition, but not recall, of novel discrimination problems is impaired following blockade of OB cholinergic receptors, although the relative contribution of muscarinic and nicotinic receptors depends on task difficulty. Blocking muscarinic receptors impairs learning for nearly all odor sets, whereas blocking nicotinic receptors only affects performance for perceptually similar odors. This pattern of behavioral effects is consistent with predictions from a model of cholinergic modulation in the OB and piriform cortex (de Almeida et al., 2013). Model simulations suggest that muscarinic and nicotinic receptors may serve complementary roles in regulating coherence and sparseness of the OB network output, which in turn differentially regulate the strength and overlap in cortical odor representations. Overall, our results suggest that muscarinic receptor blockade results in a bona fide learning impairment that may arise because cortical neurons are activated less often. Behavioral impairment following nicotinic receptor blockade may not be due to the inability of the cortex to learn, but rather arises because the cortex is unable to resolve highly overlapping input patterns.

Sensory and hedonic perceptions of italian and korean subjects: a Cross-Cultural study of Perilla Frutescens

Differences in perceptions of perilla by Korean and Italian subjects were analyzed. Descriptive analysis was used to verify how Italian assessors described the sensory properties of an unknown product. Italian subjects used the attributes grass, fennel, balsamic, and almond to describe the unfamiliar odor of perilla and perceived perilla as being bitter, astringent and as having a cooling and tingling effect. Projective mapping and hedonic testing were used to compare Italian and Korean subjects odor perceptions and acceptability. Napping results showed that both groups had similar odor perceptions, but Italian subjects tended to associate perilla with other odors whereas Korean subjects were able to specifically identify perilla. Also, Korean subjects generally gave low scores for perilla beverages, but not as low as Italian subjects, suggesting that familiarity plays an important role in food appreciation.

Arc visualization of odor objects reveals experience-dependent ensemble sharpening, separation, and merging in anterior piriform cortex in adult rat.

Visualization using the immediate early gene Arc revealed sparser and more robust odor representations in the anterior piriform cortex of adult rats when odor was associated with water reward over 2-3 d. Rewarded odor "mixtures" resulted in rats responding to either component odor similarly, and, correspondingly, the odor representations became more similar as indexed by increased overlap in piriform Arc-expressing (Arc(+)) pyramidal neurons. The increased overlap was consistent with the rats' generalization from component odors. Discriminating among highly similar odor mixtures for reward led to increased differentiation of the neural representations as indexed by a reduction in overlap for piriform Arc(+) pyramidal neurons after training. Similar odor mixture discrimination also required more trials to criterion. The visible reduction in the overlap of odor representations indexes pattern separation. The Arc visualization of odor representations in the anterior piriform network suggests that odor objects are widely distributed representations and can be rapidly modified by reward training in adult rats. We suggest that dynamic changes such as those observed here in piriform odor encoding are at the heart of perceptual learning and reflect the continuing plastic nature of mature associative cortex as an outcome of successful problem solving.

Antennal and behavioral responses of female Maruca vitrata to the floral volatiles of Vigna unguiculata and Lablab purpureus

AbstractIn many herbivorous insects, the attraction to suitable host plants is in part mediated by similar olfactory cues from different host plants. This study investigated the electrophysiological and behavioral responses of female Maruca vitrata Fabricius (Lepidoptera: Crambidae) to floral volatiles from two host plants, Vigna unguiculata (L.) Walpers and Lablab purpureus (L.) Sweet (both Fabaceae). Qualitative and quantitative differences were found between the odor profiles of two host plants by gas chromatography‐mass spectrometry (GC‐MS). Nine electroantennography‐active compounds were detected in the headspace collections of the two host plants by means of coupled GC‐electroantennographic detection. In a wind tunnel, female behaviors (upwind flight and source approach) were not affected by stimuli or their interaction with host plants, but the behaviors were influenced by host plants. A mixture of the nine bioactive compounds, including limonene, 1,3‐diethylbenzene, benzaldehyde, acetophenone, 4‐ethylbenzaldehyde, 1‐(4‐ethylphenyl)‐ethanone, 2‐methyl‐3‐phenylpropanal, 1H‐indol‐4‐ol, and 1,1′‐(1,4‐phenylene)bis‐ethanone mimicking L. purpureus (in a ratio of 0.4:9.7:2.4:5.7:78.1:4.8:100:0.6:30.3) attracted significantly more females approaching the sources compared with the mixture of compounds mimicking V. unguiculata (in a ratio of 0.3:1.4:1.6:3.7:50.8:3.2:100:4.2:16.7). Further bioassays revealed that a subtractive 4‐component blend [limonene, 1,3‐diethylbenzene, 4‐ethylbenzaldehyde, and 1‐(4‐ethylphenyl)‐ethanone in a ratio of 0.4:9.7:78.1:4.8] was essential for maximal attraction. Our study suggested that female M. vitrata might use similar odors from V. unguiculata and L. purpureus to locate suitable hosts and that an artificial lure, containing the major floral volatiles released by the two host plants, might be useful in exploring efficiency monitoring and/or control strategies of this moth in the field.

Marked changes in olfactory perception during early pregnancy: a prospective case-control study.

Pregnancy seems to be related with a significant change in olfaction. Here, we investigate this theory by testing the odor identification abilities of uncomplicated pregnant women and compare the results with non-pregnant controls. The study included 31 healthy pregnant women in the first trimester (Group 1), 30 in the second trimester (Group 2), 31 in the third trimester, and 30 non-pregnant healthy controls (Group 4). In order to measure odor identification abilities, each subject completed the 12-item Brief Smell Identification Test (BSIT). Next, the demographic characteristics and BSIT scores of the groups were compared. The total BSIT scores of the subjects in Group 1 were found to be significantly lower than those of the other groups (p < 0.001). This reduction in odor identification abilities was particularly noticeable for leather, pine, and soot. Pregnant women in the second and third trimesters had similar odor identification abilities to the healthy controls (p > 0.05). Early pregnancy might be related to significant changes in olfactory performance. The distortion of odor identification in the first trimester might be a causative factor for the development of pregnancy-specific conditions, such as morning sickness and hyperemesis gravidarum, which are both common complaints during the early phase of parturition.

Six‐Membered Silacycle Odorants: Synthesis and Olfactory Characterization of Si Analogues of Artemone, β‐Dynascone, and Herbac

AbstractSi‐Artemone (4a), Si‐β‐Dynascone (5a), and Si‐Herbac 6a, which are Si analogues of the commercial fragrance ingredients Artemone (1), β‐Dynascone (2), and Herbac (3), were synthesized expediently by the insertion of terminal alkynes into silacyclobutane 7a. The sensory characterization results revealed that 4a and 6a had quite similar odor qualities compared with those of 1 and 3, whereas 5a had a totally different odor character relative to that of 2. In terms of the odor threshold values, that of 4a was slightly more substantive than that of its carbon analogue 1, 6a was less potent than its carbon analogue 3, whereas that of 5a was approximately one‐sixth that of its carbon analogue 2.

Three structurally similar odorants trigger distinct signaling pathways in a mouse olfactory neuron

In the mammalian olfactory system, one olfactory sensory neuron (OSN) expresses a single olfactory receptor gene. By calcium imaging of individual OSNs in intact mouse olfactory turbinates, we observed that a subset of OSNs (Ho-OSNs) located in the most ventral olfactory receptor zone can mediate distinct signaling pathways when activated by structurally similar ligands. Calcium imaging showed that Ho-OSNs were highly sensitive to 2-heptanone, heptaldehyde and cis-4-heptenal. 2-heptanone-evoked intracellular calcium elevation was mediated by cAMP signaling while heptaldehyde triggered the diacylglycerol pathway. An increase of intracellular calcium evoked by cis-4-heptenal was due to a combination of activation mediated by the adenylate cyclase pathway and suppression generated by phospholipase C signaling. Pharmacological studies demonstrated that novel mechanisms were involved in the phospholipase C-mediated intracellular calcium changes. Binary-mixture studies and cross-adaptation data indicate that three odorants acted on the same olfactory receptor. The feature that an olfactory receptor mediates multiple signaling pathways was specific for Ho-OSNs and not established in another population of OSNs characterized. Our study suggests that distinct signaling pathways triggered by ligand-induced conformational changes of an olfactory receptor constitute a complex information process mechanism in olfactory transduction. This study has important implications beyond olfaction in that it provides insights of plasticity and complexity of G-protein-coupled receptor activation and signal transduction.

Neuronal circuits and computations: pattern decorrelation in the olfactory bulb.

Neuronal circuits in the olfactory bulb transform odor-evoked activity patterns across the input channels, the olfactory glomeruli, into distributed activity patterns across the output neurons, the mitral cells. One computation associated with this transformation is a decorrelation of activity patterns representing similar odors. Such a decorrelation has various benefits for the classification and storage of information by associative networks in higher brain areas. Experimental results from adult zebrafish show that pattern decorrelation involves a redistribution of activity across the population of mitral cells. These observations imply that pattern decorrelation cannot be explained by a global scaling mechanism but that it depends on interactions between distinct subsets of neurons in the network. This article reviews insights into the network mechanism underlying pattern decorrelation and discusses recent results that link pattern decorrelation in the olfactory bulb to odor discrimination behavior.

Sensory evaluation and gas chromatography–mass spectrometry (GC‐MS) analysis of the volatile extracts of pummelo (Citrus maxima) peel

ABSTRACTVolatile extracts were prepared from the peel of pummelo by cold pressing (CP), water distillation (WD), simultaneous distillation and extraction (SDE), microwave‐assisted extraction (MAE), ultrasonic‐assisted extraction (UAE) and supercritical CO2 fluid extraction (SFE). They were analysed by sensory evaluation and gas chromatography–mass spectrometry (GC‐MS). The former technique showed that the CP essential oil (CP‐EO), MAE and UAE extracts possessed similar odour profiles to the natural pummelo odour, whereas the SDE extract and WD essential oil (WD‐EO) presented the fermented/overripe and alcohol/pungent notes, and the SFE extract had a sweet note. Although the GC‐MS analyses revealed the six extracts had a certain degree of differences in their compositions, they had similar major volatiles, including limonene (301 476–497 028 µg/ml), β‐myrcene (86 400–230 400 µg/ml), β‐pinene (1370–7129 µg/ml), linalool (1916–4482 µg/ml) and germacrene D (1165–2327 µg/ml). Analyses of odour activity values (OAVs) and cluster analysis revealed the fermented/overripe and alcohol/pungent notes of the SDE extract and WD‐EO were attributed to nerol, geraniol and linalool oxide. The sweet note of the SFE extract was ascribed to citronellal and limonene oxide. Besides, a lack of limonene, neral and geranial resulted in a light green aroma of the SFE extract. This information might be valuable for further development of aromatically desirable products from citrus fruits. Copyright © 2014 John Wiley &amp; Sons, Ltd.

Coupled Extraction and Dynamic Headspace Techniques for the Characterization of Essential Oil and Aroma Fingerprint of Thymus Species

Natural essential oils and extracts were obtained from three different Thymus species (T. zygis subsp. gracilis (Boiss.) Morales, T. x citriodorus (Pers.) Schreb. and T. fontqueri (Jalas) Molero e Rovira) using hydrodistillation and supercritical fluid CO2 extraction techniques, respectively. Furthermore, the aroma fingerprint of the plant materials was also characterized by collecting the volatiles through dynamic headspace-thermal desorption technique. In order to achieve that goal, the odor space was characterized by calculating odor values and by using an olfactory family model previously validated for both quantification and classification of volatile odorants. The obtained oils were characterized in terms of their organoleptic qualities as well as their chemical composition by gas chromatography coupled with mass spectrometry. A comparison amidst different species indicates that T. zygis and T. fontqueri show a phenolic type, mainly from high thymol and carvacrol content, respectively, while T. x citriodorus was richest in geraniol and citral. Furthermore, their organoleptic qualities also revealed odor similarities between T. zygis and T. fontqueri, both exhibiting a light herbaceous odor, in opposition to a strong lemon-herbaceous scent for T. x citriodorus. Hydrodistillation extraction yields ranged between 0.67% (w/w) for both T. zygis and T. fontqueri and 1.26% (w/w) for T. x citriodorus. In comparison, extraction yields for supercritical CO2 samples were lower for T. x citriodorus and T. fontqueri (<0.05%, w/w), while for T. zygis it was obtained as 0.78% (w/w). Finally, CO2 extracts were obtained for the first time for T. x citriodorus and T. fontqueri showing similar compositions to those obtained by hydrodistillation, although typically with lower phenolic and alcoholic content (especially for thymol, carvacrol, and geraniol). DHS analysis coupled with olfactory character models allowed us to classify both aroma and odor profiles of plants. In conclusion, coupling extraction techniques to obtain essential oils together with headspace volatile analysis appear to be a relevant approach for characterization of the fingerprint of plant materials, as well as establish a clear distinction amidst them.

Analysis of particle-borne odorants emitted from concentrated animal feeding operations

Airborne particles are known to serve as a carrier of odors emanating from concentrated animal feeding operations (CAFOs). However, limited quantitative data about particle-borne odorants preclude an accurate assessment of the role of particles in odor transport. This study collected total suspended particulates (TSP) and PM10 (particles with aerodynamic diameter smaller than 10μm) at the air exhaust of eight types of CAFOs (swine: farrowing, gestation, weaning, and finishing; poultry: manure-belt layer hen, tom turkey, chicken broiler, and cage-free layer hen; in total 20 animal buildings) in multiple seasons, and examined the variability in particle odorant composition with animal operation type, season, and particle size. Fifty-seven non-sulfur-containing odorants were identified and quantitated, including carbonyls, alcohols, acids, phenols, and nitrogen-containing compounds. They in total accounted for 2.19±1.52% TSP and 4.97±3.25% PM10 mass. Acetic acid and ethanol were most abundant but less odor-contributing than phenylacetic acid, indole, dodecanoic acid, and (E,E)-2,4-decadienal, as determined by odor activity value. Particle odorant composition varied significantly with animal operation type, season, and particle size. The TSP and PM10 samples from swine gestation buildings, for example, showed distinctly different odorant compositions than those from tom turkey buildings. The summer TSP and PM10 samples contained in general lower concentrations of short-chain fatty acids but higher concentrations of long-chain fatty acids, aldehydes, and short-chain alcohols than the winter samples. Compared to TSP, PM10 samples from different types of CAFOs shared a more similar odorant composition, contained higher odorant concentrations per mass of particles, and accounted for on average 53.2% of the odor strength of their corresponding TSP samples.

Oxidative stability of lipids from hepatopancreas of Pacific white shrimp (Litopenaeus vannamei) as affected by essential oils incorporation

Oxidative stability of lipids from hepatopancreas of Pacific white shrimp (Litopenaeus vannamei) added with different essential oils at 200 ppm during 10 days of storage was studied. With increasing storage time, the progressive formation of hydroperoxide was found in all samples as evidenced by the increases in peroxide values (PV) (p&lt;0.05). Amongst all essential oils tested, lemon essential oil exhibited the highest preventive effect against oxidation, followed by plai and basil essential oils, respectively. The increases in thiobarbituric acid reactive substances (TBARS) and ρ‐anisidine value (AnV) of lipids were noticeable when storage time increased (p&lt;0.05). The increases in TBARS and AnV were retarded in the presence of essential oils. Nevertheless, the effectiveness for prevention of lipid oxidation of all three essential oils was slightly lower than α‐tocopherol when used at the same level. The formation of volatile compounds and rancid odour of samples were lowered when being incorporated with essential oils. Based on sensory evaluation, lipid containing lemon essential oil had a similar rancid odour to that added with α‐tocopherol. Thus, essential oils could be used as natural antioxidants to retard lipid oxidation and rancidity of lipids from hepatopancreas during extended storage.Practical applications: Shrimp hepatopancreas, a byproduct from shrimp processing industries, is an important source of lipids and astaxanthins, which are susceptible to oxidation. Their changes are associated with development of off‐odour and loss of nutritive value. Therefore, the uses of natural antioxidants, especially essential oils, can be a potential means to retard lipid oxidation and rancidity of shrimp oil during extended storage.Essential oils could be used as natural antioxidants to retard lipid oxidation and rancidity of lipids from hepatopancreas during extended storage.