scholarly journals New Caledonian crows keep ‘valuable’ hooked tools safer than basic non-hooked tools

eLife ◽  
2021 ◽  
Vol 10 ◽  
Author(s):  
Barbara C Klump ◽  
James JH St Clair ◽  
Christian Rutz
Keyword(s):  
Leaf Litter ◽  
The Other ◽  
Raw Material ◽  
Foraging Efficiency ◽  
Large Sample ◽  
Temporary Storage ◽  
Foraging Performance ◽  
New Caledonian Crows ◽  
Tool Types

The temporary storage and re-use of tools can significantly enhance foraging efficiency. New Caledonian crows in one of our study populations use two types of stick tools – hooked and non-hooked – which differ in raw material, manufacture costs, and foraging performance. Using a large sample of wild-caught, temporarily captive New Caledonian crows, we investigated experimentally whether individuals prefer one tool type over the other when given a choice and whether they take better care of their preferred tools between successive episodes of use, safely storing them underfoot or in nearby holes. Crows strongly preferred hooked stick tools made from Desmanthus virgatus stems over non-hooked stick tools. Importantly, this preference was also reflected in subsequent tool-handling behaviour, with subjects keeping hooked stick tools safe more often than non-hooked stick tools sourced from leaf litter. These results suggest that crows ‘value’ hooked stick tools, which are both costlier to procure and more efficient to use, more than non-hooked stick tools. Results from a series of control treatments suggested that crows altered their tool ‘safekeeping’ behaviour in response to a combination of factors, including tool type and raw material. To our knowledge, our study is the first to use safekeeping behaviour as a proxy for assessing how non-human animals value different tool types, establishing a novel paradigm for productive cross-taxonomic comparisons.

Praktiken und Praxis

2017 ◽  
Vol 2017 (2) ◽  
pp. 41-56
Author(s):  
Thomas Alkemeyer
Keyword(s):  
The Self ◽  
The Other ◽  
Raw Material ◽  
Political Agency ◽  
Lived Body ◽  
Sociological Analysis ◽  
Discipline Formation ◽  
Material Basis ◽  
Embodied Self ◽  
Self Formation

Two forms or rather perspectives of observations appear alongside practice theories: The first perspective can be called the „theatre perspective“: practice here is observed as a regular, spatiotemporally ordered, socially structured, and therefore recognizable historical form of „practical doings and sayings“, in which participants are understood as mere carriers of practices and their bodies as the raw material for processes of formation. In the other perspective, understood as the perspective of the participants themselves, practices come into view as ongoing, conflictual, and contingent accomplishments, in which participants occur as intelligently collaborating contributors with so called „lived bodies“. These bodies are affectable, sites of experience, and media of a sensitivity that allow an embodied self to orientate itself (with)in a practice. This paper proposes a methodological mediation of both perspectives by taking into account both a sociological analysis of discipline, formation, or adjustment, and the reflexive sensing in action, which can be modeled phenomenologically. Thus, a „lived-body-in-accomplishment“ comes into view that serves the material basis of subjectivation procceses, i. e. the (self-)formation of a constitutionally conditioned (political) agency.

scholarly journals Possibilities of the Development of Edible Insect-Based Foods in Europe

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 766
Author(s):  
Magdalena Skotnicka ◽  
Kaja Karwowska ◽  
Filip Kłobukowski ◽  
Aleksandra Borkowska ◽  
Magdalena Pieszko
Keyword(s):  
Material Processing ◽  
Functional Food ◽  
The Other ◽  
Raw Material ◽  
Edible Insects ◽  
Mineral Salts ◽  
Edible Insect ◽  
Alternative Protein ◽  
The World ◽  
The One

All over the world, a large proportion of the population consume insects as part of their diet. In Western countries, however, the consumption of insects is perceived as a negative phenomenon. The consumption of insects worldwide can be considered in two ways: on the one hand, as a source of protein in countries affected by hunger, while, on the other, as an alternative protein in highly-developed regions, in response to the need for implementing policies of sustainable development. This review focused on both the regulations concerning the production and marketing of insects in Europe and the characteristics of edible insects that are most likely to establish a presence on the European market. The paper indicates numerous advantages of the consumption of insects, not only as a valuable source of protein but also as a raw material rich in valuable fatty acids, vitamins, and mineral salts. Attention was paid to the functional properties of proteins derived from insects, and to the possibility for using them in the production of functional food. The study also addresses the hazards which undoubtedly contribute to the mistrust and lowered acceptance of European consumers and points to the potential gaps in the knowledge concerning the breeding conditions, raw material processing and health safety. This set of analyzed data allows us to look optimistically at the possibilities for the development of edible insect-based foods, particularly in Europe.

The Smugglers' Trade: A Neglected Aspect of English Commercial Development

1952 ◽  
Vol 2 ◽  
pp. 131-157 ◽  
Author(s):  
G. D. Ramsay
Keyword(s):  
Eighteenth Century ◽  
Foreign Trade ◽  
Free Trade ◽  
Technical Skill ◽  
The Other ◽  
Raw Material ◽  
Commercial Development ◽  
Illicit Trade ◽  
Modern Times ◽  
Victorian Age

Some share—fluctuating and uncertain, but assuredly significant—of English foreign trade in modern times is to be credited to smugglers, who were ever busy in evading customs regulations and prohibitions. Mere administrative watchfulness and thoroughness could never do more than damp their activities; it was only the triumph of free trade in the early Victorian age that deprived them of their livelihood, and until then they were able to match by increase of cunning and of organization the ever more elaborate network of the customs system—its spies, its coastguards and its cutters as well as its routine officials at the ports. The smuggler flourished right down to the end of the period of protection, despite sporadic seizures by the revenue officers. In the first half of the nineteenth century, French wines, brandies and luxury textiles were being punctually shipped across the Channel in the teeth of prohibitions. In the other direction, we know, for instance, of the existence in the same period of so remarkable á phenomenon as the muslin manufacture of Tarare, near Lyons, which relied for its raw material upon the assured supply of English yarn owled abroad. But it was probably the eighteenth century, when customs regulations were at their most burdensome and complicated, that marked the classic epoch of illicit trade, the period in which the technical skill of both breakers and defenders of the law might earn the highest rewards.

Note on Le Moustier Flints from Acton, West Drayton and Iver

1927 ◽  
Vol 5 (3) ◽  
pp. 297-298 ◽  
Author(s):  
J. G. Marsden
Keyword(s):  
The Other ◽  
Raw Material ◽  
Small Point

I am exhibiting a number of flakes and implements, which appear to be of Le Moustier date, from Acton on the Taplow Terrace, and West Drayton and Iver on the Boyn Hill Terrace.The Acton specimens are from the immediate vicinity of the working floor discovered by the late Mr. Allen Brown some forty years ago. During recent excavations in Creffield Road, I picked out of the brick-earth, thrown up from a depth of 4 to 6½ feet, seventy humanly struck flints. Forty-six are unpatinated, fresh-looking and unabraded, twenty have a bluey-white patination, amongst which are several with slightly dulled edges, and four are light-ochreous. The freshness of the cortex on several of the unpatinated flints suggests that some of the raw material was derived directly from the chalk. The majority are simple flakes and spalls. The remainder consists of eighteen small Levallois flakes, varying in size from 2 by 1½ to 3½ by 2¼ inches, one small tortoise core, a small flattish core with flaking on one face at right angles to that on the other, a flint pebble which has been used as a hammerstone, one small point and two exceptional pieces. One of these is a fairly typical graver (bee de flûte) with bluey-white patination (Fig. 1); the other may be described as a busked graver, it is made from a thickish external flake and is unpatinated (Fig. 2). A few of the flakes shew slight signs of use.

THE HORMONAL COMPOSITION OF MILK IN PRODUCTIVE ANIMALS AND ITS SAFETY FOR HUMANS

2020 ◽  
Vol 1 (3) ◽  
pp. 313-321
Author(s):  
P.A. Popov ◽  
◽  
V.S. Babunova ◽  
Keyword(s):  
Trace Elements ◽  
Growth Factor ◽  
Dairy Products ◽  
The Body ◽  
The Other ◽  
Raw Material ◽  
Important Food ◽  
The Past ◽  
Highly Sensitive ◽  
And Control

Hormones are an integral part of milk and throughout lactation, the content of certain hormones is unstable. Hormones regulate the process of starting lactation of animals, the lactation process itself, and also the other functions of the body. Milk is of great importance for the growth of young animals and the formation of immunity. Milk is a special product in the diet and is an important food and raw material for the production of dairy products for people. It contains a large amount of protein, fat, carbohydrates, vitamins and trace elements in biologically available form. But at the same time, over the past few years, more and more evidence has emerged that hormones in dairy products can impact on human health. Thus, some estrogens and insulin-like growth factor IGF-1 are involved in the initiation and provocation of breast, prostate and endometrial tumors. That’s why, it is necessary to normalize and control the content of certain hormones in milk with highly sensitive methods.

Preparation of Glass-Ceramics Using Molybdenum Tailings

2011 ◽  
Vol 284-286 ◽  
pp. 1431-1434 ◽  
Author(s):  
Jin Rui Zhang ◽  
Ru Wang
Keyword(s):  
Heat Treatment ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Crystalline Phase ◽  
Glass Ceramics ◽  
Chemical Properties ◽  
The Other ◽  
Raw Material ◽  
Physical Chemical ◽  
Nucleation Agents

In order to utilization the molybdenum tailings which be deposited in large quantities. Test used it to prepare glass-ceramics as main raw material, TiO2 as nucleation agents and CaO-Al2O3-SiO2 system and wollastonite as the principal crystalline phase. Heat treatment system of glass-ceramics was based on the differential thermal analysis. The crystalline phase, microstructure and characteristics of glass-ceramics were analysis by XRD, SEM and physical, chemical properties test. The result shows that the performance of glass-ceramics was superior to the other types of building decoration stone.

scholarly journals Heritage Building Stones from Évora, Portugal

2020 ◽  
Author(s):  
Luis Lopes
Keyword(s):  
Analytical Techniques ◽  
The Other ◽  
World Heritage Site ◽  
Raw Material ◽  
Other Hand ◽  
Heritage Site ◽  
Ancient Rock ◽  
Materials Used ◽  
The One ◽  
The City

<p>The city of Évora, a World Heritage Site recognized by UNESCO in 1986, also owes this recognition to the stones that built its monuments and preserve them until today.</p><p>This work brings together the contributions that we have gathered over the past three decades and allow us to have a very complete idea, not only about the materials used in the hundreds of monuments and historic buildings but also about their provenance. If some materials are so emblematic that they allow an immediate identification with the naked eye, others needed more sophisticated and precise techniques so that there was no doubt about their origin.</p><p>The igneous rocks and gneisses of granite composition are part of the “Massif of Évora” on which the city is built. Thus, and quite naturally they are by far the most represented group in monuments from all historical periods. Its function is essentially structural, but there are also functional, ornamental and decorative objects. For example, the oldest megalithic structures found in the vicinity of the city are made up of large granite blocks that often had to be transported to their locations.</p><p>On the other hand, many gargoyles and statues that decorate the churches are also made up of these granite rocks. On these, the natural erosion of centuries of exposure to the environment has led to a state of alteration, sometimes very accentuated, which would justify its replacement by replicas sculpted in similar rocks. Provenance studies have made it possible to identify old quarries in the vicinity of the city where, on the one hand, the ancient rock extraction techniques can be observed and on the other hand, they allow the obtaining of the raw material necessary for these restoration and conservation works. In any case, they are places that need to be inventoried and protected, with the municipality already aware of their existence.</p><p>As well as the monuments of the Roman Period, also the structures of the Medieval Period, such as the city walls, the Cathedral (started to be built in 1186 AD) and all the great churches, were also built with these granitoids.</p><p>In addition to these rocks, many others of multiple varieties and origins are present. The marbles, especially the Estremoz Marbles (Global Heritage Stone Resource), are ubiquitous in the city, but there are also emblematic marbles from other places, some easily identifiable (ie Viana do Alentejo, Escoural, Trigaches, Serpa and Vila Verde de Ficalho, for presenting mineralogy, textures, colors and patterns which, together with more recent analytical techniques, have confirmed its provenance.</p><p>Sedimentary rocks, with emphasis on Portuguese Mesozoic limestones, ie Lioz - GHSR and Brecha da Arrábida - GHSR candidate, among others more rare and with very specific use in ornamental details, are also present and contribute to enrich a heritage in stone that makes this city so special and very popular with tourists of all nationalities.</p><p>Acknowledgments: the authors thank to FCT for funding the ICT (UID/GEO/04683/2019), as well as COMPETE POCI-01-0145-FEDER-007690.</p>

scholarly journals Influence of Origin of Laying Hens on the Quality of Their Carcasses and Meat After the First Laying Period

2014 ◽  
Vol 14 (3) ◽  
pp. 685-696 ◽  
Author(s):  
Michał Puchała ◽  
Józefa Krawczyk ◽  
Jolanta Calik
Keyword(s):  
Genetic Resources ◽  
Rhode Island ◽  
New Hampshire ◽  
Broiler Chickens ◽  
Laying Hens ◽  
The Other ◽  
Raw Material ◽  
Breeding Lines ◽  
Dressing Percentage

AbstractThe aim of the study was to assess the quality of carcasses and meat from selected native breeds and breeding lines of hens after using them for laying eggs in terms of their usefulness as raw material in traditional old polish cuisine. hens included in the programme for the protection of genetic resources were the object of this study. they belonged to the following breeds/breeding lines: greenleg partridge (Z-11), rhode Island red (r-11), new hampshire (n-11) and Barred rock (WJ-44) – 30 hens from each line. the hens were kept in a closed hen house under standard raising conditions. eight hens were selected from 56-week-old hens of each line which were subjected to analysis after being slaughtered. as a result of the research conducted, it was found that:– Among the hens under study, heavier layers, i.e. Barred rock (WJ-44), new hampshire (n-11) and rhode Island red (r-11), which are characterized by good muscling and dressing percentage similar to that of broiler chickens, proved to be most suitable for use as meat.– The meat from WJ-44 hens contained most cholesterol and least protein, and the meat from Z-11 birds had the least fat compared to the other lines.– At the end of the laying period, meat and broth from WJ-44, n-11 and r-11 hens obtained better sensory scores than those from the carcasses of Z-11 hens, which makes them an attractive raw material for traditional polish cuisine.

scholarly journals The effect of cadmium contained in fertilizers on the cadmium content of vegetables

1979 ◽  
Vol 51 (1) ◽  
pp. 158-162 ◽  
Author(s):  
Antti Jaakkola ◽  
Johan Korkman ◽  
Tuomo Juvankoski
Keyword(s):  
Dry Matter ◽  
Fine Sand ◽  
The Other ◽  
Raw Material ◽  
Cadmium Content ◽  
Rye Grass ◽  
Wide Range ◽  
Npk Fertilizer ◽  
Clear Increase ◽  
Range Of Variation

The aim of the study was to find out to what extent the cadmium contained in fertilizer influences the cadmium content of vegetables. For this purpose, highly cadmium-bearing batches of fertilizer were prepared from selected quantities of raw material with an exceptionally high cadmium content. To one such batch of fertilizer, an extra amount of cadmium was added at the mixing stage. In a two-year field experiment carried out in soil consisting of clayey fine sand and begun in 1977, 1000 kg/ha of NPK fertilizer with a cadmium content of either 57 or 81 mg/kg brought about a clear increase in the cadmium content of radish tops. The cadmium content of radish roots, spinach and lettuce appeared likewise to rise, but the differences registered were not, owing to the unevenness of the field, significant. The cadmium content of the dry matter of rye grass was lower than that of the other experimental plants, and it appeared to rise less with an increase in the cadmium content of the fertilizer. Owing to the wide range of variation, the cadmium uptake of the experimental plants could not be determined reliably, The spinach, however, appeared to have taken up the largest amount of cadmium, and the rye grass the least amount. The increase in the cadmium content of the spinach harvested in 1978 corresponded to 1.5‰ of the cadmium introduced into the ground during the two-year period through application of the fertilizer with the highest content of the metallic element.

scholarly journals technical level of small-town shoemaking in Gdańsk Pomerania in the 14th century

2021 ◽  
Vol 28 ◽  
Author(s):  
Karolina Blusiewicz
Keyword(s):  
Mechanical Treatment ◽  
Professional Knowledge ◽  
The Other ◽  
Raw Material ◽  
Animal Origin ◽  
Late Medieval ◽  
14Th Century ◽  
Purposeful Selection ◽  
Selection Of

Based on the late medieval leather artefacts from Puck, Gniew, Lębork and Chojnice, an attempt was made to assess the level of shoemaking production at that time. Microscopic analyses of leather goods and production waste proved that in the field of tanning the activities related to the mechanical treatment of leather were carefully performed, although with insufficient professional knowledge concerning the process. The results of the identification of the animal origin of the leather confirmed the purposeful selection of raw material with different properties for individual footwear elements and the ability to properly cut it. The quality of the shoemaking products was highly rated in terms of technology and style. However, in the analysed collections a clearly perceptible difference in craftsmanship and assortment of products from Gniew and the other three towns was noticed.

Sign in / Sign up

Export Citation Format

Share Document