The structure and properties of carded cotton vortex yarns

The properties and spinning limits of carded cotton vortex spun yarns were investigated through the progressive change in yarn count. The yarns were tested for structural and physical properties. Critical parameters were obtained, including the ratio of wrapper fibers to core fibers, proportion and average length of different structural classes in the yarn. The structural analysis revealed that the wrapper fibers constitute an increasing proportion of the fibers as the yarn becomes finer. Moreover, the proportion and average length of different structural classes in vortex spun yarns change with yarn count. The analysis of the data obtained from yarn testing showed that as the yarn becomes finer, the yarn becomes more uneven and the number of yarn imperfections markedly increase. On the other hand, the tensile properties of vortex spun yarns remain almost unchanged as the yarn gets finer.

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The impact of combing and processing parameters on the structure and properties of fine count vortex yarns

Textile Research Journal ◽

10.1177/0040517512464296 ◽

2012 ◽

Vol 83 (4) ◽

pp. 396-405 ◽

Cited By ~ 2

Author(s):

N Erdumlu ◽

W Oxenham ◽

B Ozipek

Keyword(s):

Processing Parameters ◽

Short Fiber ◽

Fiber Content ◽

Structure And Properties ◽

Factors Affecting ◽

Yarn Properties ◽

Spun Yarns ◽

Yarn Count ◽

Yarn Structure ◽

The Impact

In this paper, the impact of short fiber content, yarn count and yarn delivery speed on the structure and properties of fine count cotton vortex yarns were investigated. The factors affecting the fine count yarn spinning on a vortex spinning system were determined on the basis of yarn structure and properties by using the linear regression technique. Moreover, the spinning limits of combed cotton vortex spun yarns were investigated. The results of the experiments revealed that the short fiber content in the cotton sliver is an important parameter in spinning fine count vortex spun yarns. The lower short fiber content in the sliver allows finer counts to be spun in the vortex spinning system. It was also observed that yarn delivery speed influences the yarn structure, and hence the yarn properties significantly, since it determines the residence time of the fibers in the yarn formation zone, and also affects the fiber control due to the air flow caused by the surface speed of the delivery rollers. In addition, the structure and properties of vortex spun yarns change significantly with regard to yarn count.

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Structuralism as a Pamphlet (On the Book by E. Reinert “How Rich CountriesGot Rich... And Why Poor Countries Stay Poor”. 2nd ed.)

Voprosy Ekonomiki ◽

10.32609/0042-8736-2014-12-147-153 ◽

2014 ◽

pp. 147-153

Author(s):

P. Orekhovsky

Keyword(s):

Economic Theory ◽

Economic Development ◽

Structural Analysis ◽

Increasing Returns ◽

The Other ◽

Static Theory ◽

Poor Countries ◽

Historical School ◽

Socio Economic Development ◽

The Relationship

The review outlines the connection between E. Reinert’s book and the tradition of structural analysis. The latter allows for the heterogeneity of industries and sectors of the economy, as well as for the effects of increasing and decreasing returns. Unlike the static theory of international trade inherited from the Ricardian analysis of comparative advantage, this approach helps identify the relationship between trade, production, income and population growth. Reinert rehabilitates the “other canon” of economic theory associated with the mercantilist tradition, F. Liszt and the German historical school, as well as a reconside ration of A. Marshall’s analysis of increasing returns. Empirical illustrations given in the book reveal clear parallels with the path of Russian socio-economic development in the last twenty years.

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HAYNES STELLITE ALLOY No. 98M2

Alloy Digest ◽

10.31399/asm.ad.co0022 ◽

1960 ◽

Vol 9 (7) ◽

Keyword(s):

Fracture Toughness ◽

Compressive Strength ◽

Physical Properties ◽

Room Temperature ◽

Base Alloy ◽

Heat Treating ◽

The Other ◽

Stellite Alloy ◽

Cobalt Base Alloy ◽

Cobalt Base

Abstract HAYNES STELLITE 98M2 Alloy is a cobalt-base alloy having higher compressive strength and higher hardness than all the other cobalt-base alloys at room temperature and in the red heat range. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness. It also includes information on heat treating, machining, and joining. Filing Code: Co-22. Producer or source: Haynes Stellite Company.

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A Computer Simulation Approach for Engineering Air-Jet Spun Yarns

Textile Research Journal ◽

10.1177/004051759706700311 ◽

1997 ◽

Vol 67 (3) ◽

pp. 223-230 ◽

Cited By ~ 7

Author(s):

Rangaswamy Rajamanickam ◽

Steven M. Hansen ◽

Sundaresan Jayaraman

Keyword(s):

Computer Simulation ◽

Computer Simulations ◽

Fiber Length ◽

Experimental Investigations ◽

Simulation Approach ◽

Air Jet ◽

Fiber Fineness ◽

Spun Yarns ◽

Yarn Count ◽

Wrap Angle

A computer simulation approach for engineering air-jet spun yarns is proposed, and the advantages of computer simulations over experimental investigations and stand-alone mathematical models are discussed. Interactions of the following factors in air-jet spun yarns are analyzed using computer simulations: yarn count and fiber fineness, fiber tenacity and fiber friction, fiber length and fiber friction, and number of wrapper fibers and wrap angle. Based on the results of these simulations, yarn engineering approaches to optimize strength are suggested.

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The structure and properties of oriented fibers of poly(pentamethylene terephthalate). II. Structural analysis of two different crystalline phases by x-ray crystallography

Journal of Polymer Science Polymer Physics Edition ◽

10.1002/pol.1978.180161208 ◽

1978 ◽

Vol 16 (12) ◽

pp. 2189-2214 ◽

Cited By ~ 19

Author(s):

I. H. Hall ◽

N. N. Rammo

Keyword(s):

Structural Analysis ◽

Structure And Properties ◽

Crystalline Phases ◽

X Ray ◽

X Ray Crystallography

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IX. The electric conductivity of nitric acid

Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character ◽

10.1098/rsta.1898.0009 ◽

1898 ◽

Vol 191 ◽

pp. 365-398 ◽

Cited By ~ 6

Keyword(s):

Nitric Acid ◽

Physical Properties ◽

Nitrous Acid ◽

Internal Resistance ◽

The Other ◽

Reasonable Degree ◽

Mineral Acids ◽

Artificial Illumination ◽

The Subject ◽

Deep Green

Of the commoner mineral acids the chemical changes of Nitric Acid, from their evident complexity, have formed the subject of numerous memoirs, while those of sulphuric acid, from their assumed simplicity, have been to some degree neglected; on the other hand, the physical properties of the latter have been studied with considerable elaboration, while those of the former have been passed over, doubtless on account of the corrosive nature of the acid and the difficulty of preparing and preserving it in a reasonable degree of purity. Further, with certain exceptions, the alterations in physical properties induced by the products of reduction, be they nitrogen peroxide or nitrous acid, either singly or conjointly, have attracted but little attention, though it is a common matter of observation that the current intensity of a Grove’s or other cell containing nitric acid remains constant, even though the fuming acid, originally colourless or red, has become of a deep green tint. It is more than probable that of the factors of Ohm’s law, both the E. M. F. and internal resistance are continually varying. At the earliest stages of the enquiry it was found that the passage of a few bubbles of nitric oxide gas into a considerable volume of nitric acid produced an alteration of one percent, in the resistance, and the same result could be effected to a less degree by exposure to sunlight, and to a still less degree by exposure to artificial illumination. Therefore, we determined to investigate the alterations of conductivity produced by changes of concentration and temperature in samples of acid purified with necessary precautions, more especially as former workers upon the subject have either used samples of acid confessedly impure, or have been silent as to any method of purification, or have adopted no special care in dealing with a substance so susceptible of polarisation.

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Some Preliminary Notes on the Physical Properties of the Soils of the Ganges Valley, more especially in their relation to Soil Moisture

The Journal of Agricultural Science ◽

10.1017/s0021859600000472 ◽

1906 ◽

Vol 1 (4) ◽

pp. 454-469 ◽

Cited By ~ 1

Author(s):

H. M. Leake

Keyword(s):

Soil Moisture ◽

Physical Properties ◽

Short Duration ◽

Irrigation Water ◽

The Other ◽

Indian Agriculture ◽

Northern India ◽

The One ◽

The Ganges

In a stretch of arable lands like those of the Ganges Valley, although damage may be caused by occasional floods, which are sudden and of short duration, the more general, and by far the most serious loss is due to deficiency of moisture of the soil: thus the relation of the soil to soil moisture becomes of more than ordinary importance. Dr Voelcker, in his Report on Indian Agriculture, remarks: “In India the relation of soils to moisture acquires a greater significance than almost anywhere else.......” This relation is fundamental, for on it depends the methods for the conservation of soil moisture, for the economical application of irrigation water, and for the treatment of barren and salt lands—all problems of direct interest to agriculturists in the plains of Northern India. The methods for dealing with these problems must be largely—if not entirely—empirical until such time as the behaviour of the soil in its relation to moisture is investigated. The problem in all its various branches is enormous, and in a country in which the seasons follow each other with such rapidity, and vary the one from the other in so marked a manner, it frequently happens that a particular point, if not determined within a period of a few days, must await solution until the following year.

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Aspidistra revoluta, a new species from limestone areas in Chongqing, China

Phytotaxa ◽

10.11646/phytotaxa.257.3.6 ◽

2016 ◽

Vol 257 (3) ◽

pp. 280 ◽

Cited By ~ 2

Author(s):

Hao Zhou ◽

Si-rong Yi ◽

Qi Gao ◽

Jie Huang ◽

Yu-jing Wei

Keyword(s):

New Species ◽

Chromosome Number ◽

Average Length ◽

Chromosome Complement ◽

Pollen Grains ◽

The Other ◽

Morphological Comparison ◽

Chongqing Municipality ◽

Karyotype Asymmetry ◽

A New Species

Aspidistra revoluta (Asparagaceae) is described and illustrated as a new species from limestone areas in southern Chongqing Municipality, China. The new species can be distinguished from the other Aspidistra species by its unique umbrella-like pistil with large revolute stigma lobes that bent downwards and touch the base of the perigone. A detailed morphological comparison among A. revoluta, A. nanchuanensis and A. carnosa is provided. The pollen grains of A. revoluta are subspherical and inaperturate, with verrucous exine. The chromosome number is 2n = 38, and the karyotype is formulated as 2n = 22m + 6sm + 10st. The average length of chromosome complement is 4.50 μm, and the karyotype asymmetry indexes A1 and A2 are respectively 0.37±0.03 and 0.49±0.01.

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