Effects of anosmia on LH secretion,ovulation and oestrous behaviour induced by males in the anovular creole goat

Two experiments were conducted in order to determine the role of the sense of smell in the LH, ovarian and oestrous responses of anovular goats to the introduction of bucks.In Experiment 1, 46 anovular females were allocated to one of three groups after laparoscopy: (C) Control — intact females prevented from contact with males; (I) Intact — intact females allowed contact with males; and (A) Anosmic — females with their sense of smell destroyed by irrigation of the nasal mucosa with ZnSO₄ and subsequently allowed contact with males. Seven days after male introduction, 53% and 20% of the females in groups I and A, respectively, had ovulated, while none of those in group C had ovulated.In Experiment 2, 38 anovular females were allocated to one of two groups after laparoscopy: (I) Intact — intact females allowed contact with males; and (A) Anosmic — females with their sense of smell destroyed as in Experiment 1, and subsequently allowed contact with males. Destruction of the sense of smell did not modify the percentage of females exhibiting an LH pulse after introduction of the male (I: 79% vs. A: 74%), nor did it modify the interval between male introduction and the maximum level of LH (44 min vs. 39 min), the maximum concentration of LH reached (1.97 ng/ml vs. 2.35 ng/ml), or the mean interval between male introduction and onset of oestrus (3.3 days vs. 3.2 days). However, the percentages of females showing oestrus and of females ovulating before day 9 were reduced by the suppression of the sense of smell (I: 89% vs. A: 50%).Therefore destruction of the sense of smell reduced, but did not completely suppress, the response of anovular goats to buck introduction, probably because the females detected the males using other senses.     

The odour of things: Smell and the cultural elaboration of disgust in Eastern Indonesia

Recent years have witnessed an increasing number of calls for anthropology to devote more attention to non‐visual modes of perception. Frequently, the implicit suggestion of these calls has been that the acknowledgement of different ways of organising the senses could help us escape the supposed malaise of modern ‘ocular‐centrism ‘. This paper explores the sense and symbolism of smell in Buli, a village in eastern Indonesia, to argue that smell is part of an ontology that catches Buli people in a malaise of their own. ‘Bad’ smell attests to an ambiguous moral order that can be traced across myth, ritual and everyday life. Ambiguity is ever‐present because ‘bad’ or disgusting smells destabilise the very conceptual order they also help support. The analysis of smells as they relate to local notions of disgust is therefore suggested as an alternative way to conceptualise the contradictory nature of power.     

Learning about the functions of the olfactory system from people without a sense of smell

The olfactory system provides numerous functions to humans, influencing ingestive behavior, awareness of environmental hazards and social communication. Approximately ⅕ of the general population exhibit an impaired sense of smell. However, in contrast to the many affected, only few patients complain of their impairment. So how important is it for humans to have an intact sense of smell? Or is it even dispensable, at least in the Western world? To investigate this, we compared 32 patients, who were born without a sense of smell (isolated congenital anosmia - ICA) with 36 age-matched controls. A broad questionnaire was used, containing domains relevant to olfaction in daily life, along with a questionnaire about social relationships and the BDI-questionnaire. ICA-patients differed only slightly from controls in functions of daily life related to olfaction. These differences included enhanced social insecurity, increased risk for depressive symptoms and increased risk for household accidents. In these domains the sense of olfaction seems to play a key role.     

Bacterial pollution of the littoral waters of the northern suburbs of Tunis

The authors present in this paper a study of the bacterial pollution of inshore waters of northern suburbs of Tunis, on the basis of 180 sampled collected in 15 different stations, 15 monthly (one for each station). Three districts have been considered: Raouad-Gammarth, La Marsa-Carthage and La Goulette. This last district is mostly submitted to the bacterial pollution, caused by its neighbourhood of the lagoon of Tunis "reserve of pollution" and of the city of Tunis.     

The occupational meaning of smell

The sense of smell has its meaning for a successful performance of certain occupations. It has further a protective meaning. The acuity of smell often changes for different reasons. The prolonged or repeated smelling is combined with the process of smell adaptation, fatigue and habituation. They diminish the flavour sensations and increase the risk of work accidents. Some chemical compounds are characterized by a quick and high adaptation. The occupational changes of smell can be peripheral or central. The qualitative changes of the smell perception are numerous, but they have little sense in industrial hygiene. The hypersensibilisation can be temporal or lasting, where a change of profession is sometimes inevitable. The values of smell thresholds (detection, recognition, distinction) of 25 substances are given. The sensitivity of smell is greater at the smell threshold concentrations. The smell thresholds are put among the main basic properties of chemical compounds which decide about the values of MAC and about the possibilities of their passing over. 68 substances ranged according to their basic characteristics in three groups were studied. There was statistical dependence between the molecular weight, the boiling point, smell thresholds of detection and recognition. In two groups of matters there was a dependence between the threshold of irritation and the smell threshold of recognition and distinction. The regression was linear with the majority of dependencies.     

Evidence for increased olfactory receptor gene repertoire size in two nocturnal bird species with well-developed olfactory ability

Background  

In vertebrates, the molecular basis of the sense of smell is encoded by members of a large gene family, namely olfactory receptor (OR) genes. Both the total number of OR genes and the proportion of intact OR genes in a genome may indicate the importance of the sense of smell for an animal. There is behavioral, physiological, and anatomical evidence that some bird species, in particular nocturnal birds, have a well developed sense of smell. Therefore, we hypothesized that nocturnal birds with good olfactory abilities have evolved (i) more OR genes and (ii) more intact OR genes than closely related and presumably less 'olfaction-dependent' day-active avian taxa.     

Led by the nose: Olfaction in primate feeding ecology

Olfaction, the sense of smell, was a latecomer to the systematic investigation of primate sensory ecology after long years in which it was considered to be of minor importance. 1 This view shifted with the growing understanding of its role in social behavior 2 and the accumulation of physiological studies demonstrating that the olfactory abilities of some primates are on a par with those of olfactory‐dependent mammals such as dogs and rodents. 3 , 4 Recent years have seen a proliferation of physiological, behavioral, anatomical, and genetic investigations of primate olfaction. These investigations have begun to shed light on the importance of olfaction in the process of food acquisition. However, integration of these works has been limited. It is therefore still difficult to pinpoint large‐scale evolutionary scenarios, namely the functions that the sense of smell fulfills in primates’ feeding ecology and the ecological niches that favor heavier reliance on olfaction. Here, we review available behavioral and physiological studies of primates in the field or captivity and try to elucidate how and when the sense of smell can help them acquire food.     

Lack of predator‐odor detection and avoidance by a songbird,the House Wren

ABSTRACT Recent studies suggest that songbirds have a better sense of smell than initially suspected. Work is now focused on determining how birds use their sense of smell to enhance survival and reproduction. One question is whether birds use smell to detect and avoid predators. We examined the reaction of House Wrens (Troglodytes aedon) to the odor of a potential predator in their nests. On two different days of the nestling stage, we placed papers infused with the urine and anal scent gland material of a mustelid (American mink, Neovison vison), a neutral odoriferous substance (cologne, garlic, or vinegar), or water in nest boxes. The proportion of individuals that hesitated to enter nest boxes after first arrival did not differ significantly between treatments on either day. We also found no significant differences on either day in the time it took wrens to first enter nest boxes, time spent in nest boxes after first entry, the propensity to stay in nest boxes and brood young, or latency to return to nest boxes after first exposure to treatments. Our results suggest that House Wrens either did not detect or did not respond to foreign odors in nest cavities, including the odor of a mustelid predator. In a similar study ( Amo et al. 2008 . Functional Ecology 22: 289–293), adult Blue Tits (Cyanistes caeruleus) were less likely to enter nest boxes that contained the odor of a mustelid. One explanation for this difference is that Blue Tits may have a better sense of smell than House Wrens. Alternatively, or additionally, Blue Tits may be inherently (or as result of experience) more prone than House Wrens to avoid unusual odors or, specifically, the odor of mustelid predators in their nests. Additional studies are needed to determine the extent to which songbirds use their sense of smell to detect and avoid nest predators.     

Chemical senses and aging: taste versus smell

Earlier studies have suggested that aging may adversely affectthe sense of smell more than the sense of taste. Although bothsense modalities lose some absolute (threshold) sensitivity,agerelated losses of suprathreshold magnitude seem to occurcommonly in the sense of smell, less commonly in the sense oftaste. This apparent difference between taste and smell wasput to direct test in the same subjects in the same test session.Young (20–25 years) and two groups of elderly people (65–78and 80–95 years) estimated the taste intensity of variousconcentrations of NaCl and the odor intensity of various levelsof iso-amyl butyrate, under instruction to make magnitude estimationsof both kinds of stimuli on a common scale. Relative to thetaste estimates, the old gave lower odor estimates than theyoung. Also, the 80–95 year group showed, on average,a greater odor deficit than the 65–78 year group. Thisoutcome supports the main hypothesis that as age increases smelldeficits present a more serious problem than do taste deficits.     

Odor and (bio)diversity: single enantiomers of chiral fragrant substances

Our sense of smell is enantioselective. This review reports interesting examples of single stereoisomers of natural and synthetic odorants, prepared via bioorganic routes, that support this statement. This article is the summary of a talk given at the Flavours & Fragrances 2004 conference in Manchester at the MCC/UMIST, 12-14 May, 2004.     

Olfaction and Taste: Invasive Odours and Disappearing Objects

The metaphorisation of sight and hearing, the objective senses, dominate the founding ideas, or philosophemes, of Western philosophy. The senses of taste and smell are of little relevance in the formation of conceptual knowledge or in classificatory systems; they are, by virtue of their dissolving objects, incapable of giving objective knowledge in Western metaphysics. Derrida and Ulmer developed a metaphorology that exploits the chemical basis of the subjective senses of taste and smell. The anthropology of the senses takes this questioning of metaphysics into issues of how olfaction and taste function in sociality. In the routine practices of everyday life, is olfaction able to create the sense of community that it does in rituals? Or, has the repression of smell in humanity's evolution towards ‘civilisation’ muted the connective ability of multiple odour particles? In a culture and metaphysics that presumes the separability of the self from the other and the self from the object, is there a place for senses that make a nonsense of separation and objectivity through their state of meaningful dissolution? Through philosophy's metaphorisation, has taste been stripped of its sensuousness and made a sense for aesthetics and not flavours and textures? In a metaphorics premised in judgement and discernment, can taste be a sense that founds sociality? In blurring the boundaries between self and other that are necessary to form and maintain the distinction, the dissolvability of smell and taste makes another metaphorics and other socialities possible. Of all the senses, that of smell—which is attracted without objectifying—bears clearest witness to the urge to lose oneself in and become the ‘other’. As perception and the perceived—both are united—smell is more expressive than the other senses (Horkheimer and Adorno 1979:184).     

On the ‘transmission sense of information’

In order to illuminate the role of information in biology, Bergstrom and Rosvall (Biol Philos 26:159–176, 2011a; Biol Philos 26:195–200, 2011b) propose a ‘transmission sense of information’ which builds on Shannon’s theory. At the core of the transmission sense is an appeal to the reduction in uncertainty in receivers and to etiological function. I explore several ways of cashing out uncertainty reduction as well as the consequences of appealing to function.     

The impossibility and necessity of quality of life research

There are probably a number of reasons why the medical community pays surprisingly little systematic attention to quality of life, either in research or in clinical care. Possibly our society's fascination with high technology and the rescue of endangered lives has encouraged the medical profession to focus on acute care, where their interventions can bring dramatic results. And perhaps because such high-tech acute care requires great knowledge and skill, medical educators have not devoted as much time to educating students and residents about the more mundane matters of medicine. Another reason, on which I will focus here, is the fact that scientific research into quality of life is particularly difficult, methodologically. It does not lend itself easily to the crisp, clean answers for which we strive in basic science. It is "soft," inexact, not "hard." In this article I hope to explain why such research is indeed fraught with hazard. The scientists are attempting a task that is, in a profound philosophical sense, impossible. They have no direct access to the data they most need, and every method of validating their results is fundamentally flawed. Nevertheless, I will also suggest how we can fruitfully undertake such research and, equally important, why we must.     

Brain anatomy of <Emphasis Type="Italic">Amurosaurus riabinini</Emphasis> and some neurobiological peculiarities of duck-billed dinosaurs

Twenty-two endocasts of 12 specimens of Amurosaurus riabinini Bolotsky et Kurzanov (Lambeosaurinae, Hadrosauridae) have been examined. The most important neurobiological features of this species and duck-billed dinosaurs integrally are discussed. It has been established that the sense of smell played the major role in afferentation of hadrosaurids. In lambeosaurines, the vomeronasal sense of smell was probably intensified to search for sexual partners at a large distance. The hypotheses of sound and visual communications of duck-billed dinosaurs are not corroborated.     

The effect of insularity on the diversity of land birds in the Fiji islands: implications for refuge design

Ecologists have argued over rules of thumb that could be used to set priorities in configuring systems of reserves for preserving biological diversity. To evaluate these simple strategies, I assembled a particularly large and comprehensive data set on the land birds of the Fiji archipelago. I analyzed the species distribution on 220 islands to compare the running total of species preserved by differènt sequences of adding nature reserves to a hypothetical reserve system, treating each island as if it were a potential reserve. A strategy of maximizing the number of islands contributing to any given reserve area (maximum fragmentation) is much more effective at including species than a strategy of maximizing the size of the island components of a reserve (minimum fragmentation). Nevertheless the maximum fragmentation strategy is not a very good one. It is less effective than many random strategies, especially when about 2–10% of total area is to be set aside as reserve, and when only rare species are considered. A computer program was used to determine an optimal strategy by maximizing the number of additional species added for each unit of area added. This strategy is always substantially more effective at encompassing species diversity than either the maximum or minimum fragmentation strategies. It is suggested that the poor performance of the minimum fragmentation strategy is due principally to the presence of many smaller-island endemics within the Fiji archipelago. More generally, it is argued that the effect of fragmentation on species diversity depends on the geographic scale and isolation of the region under consideration. In these respects the Fiji Archipelago may be a particularly good model for continental reserve systems.     

Scenting a Subject: Odour Poetics and the Politics of Space

Olfactory studies are truly multidisciplinary, from anthropology to zoology. What literary criticism can offer is analysis of the language of smell and the discourses of olfactory practice which give smell meanings. In this paper I explore the poetics of odour in selected contexts in the developed West of the twenty-first century. I argue that the language of smell is elusive, contradictory, disguised: nonetheless, it deploys metaphor, story, personal meaning and social meaning, all frames that ‘nest’ together. I demonstrate contradictions of olfactory practice with reference to urban space and technologies of scent, acting on bodies and places. I argue that a relationship between scent, identity and space can be understood in terms of an olfactory sublime, to which there is also resistance, sanctioned by new laws. In public space, the complexity of deodorisation appears in the conflict between fragrance-free and compulsory olfaction, as I argue with reference to Halifax, Nova Scotia and to the London Underground.     

植物腺体的萜类代谢工程

植物所产生的气味都是从其表皮细胞特化形成的特定结构中即毛状体释放出来的。这些气味一般都是属于次生代谢过程中的单萜类化合物。产生这些气味目前认为是通过细胞质和细胞质体两种途径来合成的。而关于合成这些气味的基因调控以及基因转化工程都有了初步的研究及探索,并取得了一定的进展。     

Prosperous Pollutants: Bargaining with Risks and Forging Hopes in an Industrial Town in Eastern Serbia

ABSTRACT

The article explores the ‘work of hope’ in relation to air pollution and health hazards in Bor, a polluted copper-processing town in Eastern Serbia. The aim of this paper is to show the mutual imbrication of hope and risk by delineating how hope for a stable personal and communal future was anchored in the polluting company and the toxic substances it produced, which, in various ways, provided a sense of possibility and opportunity. I show how the work of hope demanded simultaneous weighing up, manoeuvring, accepting, and bargaining with risks that became an integral part of the work of hope in a social setting where the double bind of growth versus sustainability was deeply embedded. I argue that together, hope and risk were both framing devices for thinking about and living towards futures in a context of reindustrialisation and recent sudden economic flourishing in this post-socialist town.