describe the history and use of android technology
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 1 pptx
... years through the development and use of a succession of live food organisms as feed for the developing larvae. The aim of the present manual was therefore to review and summarise the latest developments ... and use of live food organisms as feed for the developing larvae. The present manual describes the major production techniques currently employed for the cultivation of the major types of live ... 1.5.). Most of the criteria as identified from the viewpoint of the larva have already been discussed above with the exception of the criterion ‘purity’. One should not only consider the impurities...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 2 doc
... reproducibility, which is a function of the sampling, diluting, and filling of the counting chamber, as well as the choice of the right type of counting chamber and range of cell concentration. Counting ... extensive research efforts, the use of artificial diets in the culture of bivalve molluscs is still very limited. The advantages and disadvantages of each of the three classes of replacement diets ... between the culture medium and the air. The latter is of primary importance as the air contains the carbon source for photosynthesis in the form of carbon dioxide. For very dense cultures, the...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 3 ppt
... called the lorica. The shape of the lorica and the profile of the spines and ornaments allow the determination of the different species and morphotypes (see 3.4.). The rotifer’s body is differentiated ... consisting of the head, trunk and foot (Fig. 3.1.). The head carries the rotatory organ or corona which is easily recognized by its annular ciliation and which is at the origin of the name of the ... University of Gent, Belgium 4.1.1. Introduction Among the live diets used in the larviculture of fish and shellfish, nauplii of the brine shrimp Artemia constitute the most widely used food...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 4 pptx
... delivery of vitamins, chemotherapeutics and vaccines. Furthermore, a better knowledge of the biology of Artemia was at the origin of the development of other Artemia products, such as disinfected and ... feet and feathers of birds, and when ingested they remain intact for at least a couple of days in the digestive tract of birds. Consequently the absence of migrating birds is probably the reason ... is the common feature determining the presence of Artemia, the impact of other parameters (temperature, primary food production, etc.) may at most affect the abundance of the population and...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 5 docx
... the use of decapsulated cysts constitutes a saving of over one third in the amount of Artemia cysts used, compared to the use of live nauplii. Table 4.2.4. The proximate composition (in % of ... hatchability. Hatchability of cysts is largely determined by the conditions and techniques applied for harvesting, cleaning, drying and storing of the cyst material. The impact of most of these processes ... over 80% of their cellular water, and upon interruption of the aeration, the now coffee-bean shaped decapsulated cysts settle out. After harvesting of these cysts on a mesh screen they should...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 6 docx
... positively phototactic, their concentration can be improved by shading the upper part of the hatching tank (use of cover) and focusing a light source on the transparent conical part of the bottom. Nauplii ... generally used for feeding the late larval and postlarval stages of penaeids. Freshly-hatched nauplii are usually offered at the start of the first mysis stage, and sometimes even earlier at the ... and may be satisfied through the consumption of seawater, the main concern regarding the mineral composition of Artemia is whether they meet the requirements of fish or crustacean larvae reared...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 7 pptx
... capacities. Application of an that takes profit of the specific aspects of ongrown Artemia: instead of adding the enrichment emulsion at the end of the culture, it is distributed during the culture. This ... Harvesting of high-density cultures of Artemia can be facilitated by taking advantage of the surface respiration behaviour of the animals. When the aeration in the culture tank together with the flow-through ... evaluation of dry food is the consistency of the food quality and supply, and the possibility for storage without loss of quality. It follows therefore that bulk products must be stored in a dry and...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 8 pptx
... acidity of the bottom. The use of organic fertilizers increases the risk of infections. This risk can be reduced by composting the manure before use. One of the main disadvantages of organic ... predators from entering the culture ponds. The same type of filters as described for large salt operations can be used. Moreover, the small size of the ponds allows the use of so-called filter ... (degradation of organic matter by bacteria) and the nutrient level in the intake water, nitrogen often limits algae growth. The use of nitrogen fertilizers is therefore widespread. Four types of inorganic...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 9 pptx
... aware that the greater the surface area of the net the more effective and rapid the filtration. Hence, the upper limit of the dimensions of the nets depends on the ease of handling rather than ... filtration and prevent losses due to the narrow and strong back current. The longer the distance between the propeller and the net, the wider and shorter the net can be. The distance between the ... fixed to the pond gates. The amount of zooplankton collected depends on the zooplankton concentration in the water flowing out of the reservoir and on the volume of the water leaving the reservoir....
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 10 pptx
... also the production and use of live food organisms as feed for the developing larvae. The present manual reviews and summarizes the latest developments concerning the production and use of the ... of two algal cultures. The problem with these selected media is that they are not able to sustain many 300 and depends largely upon the size of the female and the food intake) are laid in the ... before the females, the males must be removed from the container and left out of the water, so as to stop the male spawning; the produced by the animals swimming on the bottom whirls up the material...
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Tài liệu The History and Practice of the Art of Photography docx
... beforedirected, either to diffused day-light or to the direct rays of the sun. The light will now penetrate the whiteparts, and the second photograph be the reverse of the first, or a true picture of the ... [hipho_18.gif] The evaporation of the water from this bulb decreases the temperature of the mercury in the tube b in proportion to the dryness of the atmosphere, and the number of degrees the tube ... it on the decanter, and lay it in the sun's rays in such a manner that the rays may pass through the spacescut out of the paper and fall on the surface of the liquor the part of the glass...
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Guidance for the Selection and Use of Personal Protective Equipment (PPE) in Healthcare Settings doc
... underneath the gown at the neck and shoulder, peel away from the shoulders. Slip the fingers of one hand under the cuff of the opposite arm. Pull the hand into the sleeve, grasping the gown ... include inside the gloves; inside and back of the gown, including the ties; and the ties, elastic, or ear pieces of the mask, goggles and face shield. 11Do’s and Don’ts of Glove Use • Work from ... gown, first select the appropriate type for the task and the right size for you. The opening of the gown should be in the back; secure the gown at the neck and waist. If the gown is too small...
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The History and Antiquities of the Doric Race, Vol. 2 of 2 pdf
... 8859-1***START OF THE PROJECT GUTENBERG EBOOK THE HISTORY AND ANTIQUITIES OF THE DORIC RACE, VOL. 2 OF 2*** The History and Antiquities Of The The History and Antiquities of the Doric by Karl ... derived from the possession of land, also carried on the extensivecommerce of these two states; otherwise the wealth of the merchant would soon have exceeded that of the landowner. In the Doric ... IOTA~}{~GREEKSMALL LETTER NU~}); of the Athenians, to keep them together. The Argives first effected the union of the boroughs at Mantinea, doubtless not until they had seen other instances of the same proceeding,...
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