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Catechu liquor, which is deep brown-red in color, was purified with a micro-filtration membrane and the stability of catechu dye to different levels of temperatures and pH were investigated in this paper. The effects of the dyeing conditions on color characteristic values and color fastnesses of the dyed wool fabrics were also investigated. The results show that the liquor of catechu dye is stable at pH values of 3-7 and its color changes to a deeper brown-red when its pH value is above 8. The preferable dyeing conditions for wool fabric with refined powder catechu dye are as follows: dyeing temperature of 100±C, pH value of 6.5 for the dye bath and catechu dye of 1-4% (o.w.f).

The dyed wool fabric has good color fastnesses to washing, alkali perspiration and dry rubbing. However, its color fastness rating to wet rubbing is poor, ranging from 2-3. Further research will be needed on this aspect.

Precision ultrasonic thickness gauges Du Pont Imaging Systems of Stevenage announce the addition of a new range of precision ultrasonic thickness gauges to the non‐destructive testing equipment they market in the UK.

The purpose of this paper is to study the cause of severe corrosion of the galvanized lightning rods in a 220 kV transformer substation, and to seek the effective corrosion inhibition measures for the hollow lightning rods.

The corrosion morphology and rust component of lightning rod was analyzed, and the corrosion process of lightning rod was researched by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), ion chromatography and electrochemical tests.

The results indicated that the outer surface of hollow lightning rod was corroded slightly; however, its inner surface suffered severe corrosion because of a long time high-humidity environment inside the tube caused by the rainwater permeation. A rust layer consisted of Fe₃O₄ and a little FeOOH was accumulated on the inner surface of the hollow lightning rod. Moreover, Fe₃O₄ rust layer worked as a large cathode area which could promote the corrosion of metal substrate further. A self-accelerating corrosion process was formed on the inner surface, making the corrosion failure of lightning rod occurred and aggravated gradually.

The corrosion of inner surface of hollow lightning rod cannot be detected easily. More attention should be paid to the corrosion inhibition of lightning rod. The key of corrosion inhibition for the hollow lightning rod was to avoid the rainwater accumulation inside tube. The research results can provide guidelines on the corrosion inhibition measures selection of lightning rod in transformer substation.

A new four‐coat, high‐metallic coating system developed by PPG Industries for metal building applications gives the appearance of anodised aluminium panels, but with superior physical properties.

Agricultural waste and food sources are some of the pollutants of the environment. One of these wastes is the peel of fruits that cannot be consumed as food. In this regard, walnut husk (WH) and oleaster peel (PO) are known as two important sources of tannin and are bulky wastes. Because of the high percentage of tannin, these materials can be used as a natural source for the preparation of bio-mordant in the dyeing process.

In this study, Reseda and Madder were used as natural dyes in the presence of a mixture of two bio-mordants. WH and PO were selected as bio-mordant. All natural resources are extracted to obtain the juice. The phenolic percentage of tannin-containing extracts was evaluated and then it was used for wool yarns by premordanting method. The results of evaluating the fastness properties using the ISO method.

The most important achievement of this research is the use of agricultural waste in the dyeing process to reduce environmental pollution and create added value. All compounds rich in tannin have some phenolic components, therefore the amount of phenolic content of these extracts was evaluated. The effect of mixing the mordant on the color characteristics of the yarns was investigated and the results showed that changing the ratio of the combination of two mordant is effective on the K/S values. The results of evaluating the fastness properties using the ISO method showed that the washing, rubbing and light fastness in the presence of mordant is good, good and moderate, respectively.

In this paper, to the best of the authors’ knowledge, for the first time, the combination of two natural extracts obtained from agricultural waste has been used to create a new bio-mordant on fibers and improve stability.

The purpose of this paper is to examine the turbulent fluid flow and heat transfer characteristics for rectangular channel provided with solid plate baffles which are arranged on the bottom and top channel walls in a periodically staggered way.

The turbulent governing equations are solved by a finite volume method with the second‐order up winding scheme and the k‐ω turbulence model to describe the turbulent structure. The velocity and pressure terms of momentum equations are solved by SIMPLE (semi‐implicit method for pressure‐linked equation) algorithm. The parameters studied include the entrance Reynolds number Re (5.10³‐2.10⁴), the baffles height are fixed at (h=0.08 m); whereas three different baffle spacing were considered S₁ = D, S₂ = D/2 and S₃=3D/2 and the working medium is air.

In this work, it is found that vortex shedding generated by the baffle on the upper wall can additionally enhance heat transfer along the baffle surfaces. The wavy flow significantly changes the recirculating zone behind the last baffle. Finally, changing the baffles spacing seemed to reduce to changing the heat transfer surface between the solid and the fluid in the sense that higher heat transfer is obtained for lower spacing between baffles.

The results of the numerical calculations of the flow field indicate that the flow patterns around the solid baffles depending on the spacing of the baffles and it significantly influences the local heat transfer coefficient distributions. The problem is inversely proportional for the friction factor.

Electroplated tin deposits are used as etch resists during the processing of printed circuit boards. The tin coating protects the copper tracks during etching but is subsequently removed (stripped) to expose the defined copper circuitry. The commonly used stripping solutions are based on nitric acid and after use they represent a very acidic waste product with a high metal content. The disposal of these spent strippers is typically via off‐site neutralisation and precipitation followed by subsequent landfill. This is clearly a non‐sustainable waste of valuable resources and a practice that is increasingly undesirable as environmental legislation becomes more stringent. This paper outlines the results of a scoping study carried out into current industry practices for tin stripping and details of components of a potential integrated treatment system for these stripping solutions. Individual technologies for such an integrated system incorporate the recovery of the tin oxide by filtration, the concentration and reuse of nitric acid solutions by diffusion dialysis and the reclamation of other metals, i.e. copper by electrowinning.

Factors which influence consumer spending, among the most sought after in any field of market research, things people buy and why, is valuable data on which much industrial planning, advertising techniques and marketing is based, but in no other field of trade is consumer preference so closely related to pure economics, i.e., value received in money terms, as in food. With most other commodities, from clothes to cars, hair‐do's to houses, factors affecting consumer choice have different results; appearance, aesthetic quality and neighbourly competition, all play a part, though appearance in a few foods is not entirely without significance, e.g., white bread. Present high levels of consumer spending are said by politicians to be a danger to the country's economy; a more prosaic thought would be that Government spending, or squandering, constituted the greater threat. In the main, factors which influence household food expenditure are essentially down to earth—palatability, digestibility, keeping quality and how far a food will go in the preparation of meals, its value in money terms. The king‐pin in all market research on food must be the woman of the house; it is her laying out of the household purse that determines the amount of food expenditure and the varieties purchased week by week. A housewife's choice, however, is a complex of her family's likes and dislikes, rarely her own, and also determined by the amount allocated from her purse for this part of the household budget and the number of mouths she has to feed. Any tendency to experiment, to extend the variety of food, is only possible with a well‐filled purse; with a large family, a common complaint is of monotony in the diet. A factor of immense importance nowadays is whether the housewife is employed or not, and whether whole‐time or part‐time, and which part of the day she can be in her own home. To this may be attributed, as much as anything, the rise in consumption of convenience foods. Fortunately for the purposes of reasonable accuracy in the results of enquiries, housewives form a class, reliable and steady, unlikely to be contaminated by the palsied opinions of the so‐called lunatic fringe in this unquiet age. Any differences in food choice are likely to be regional, and settled dietary habits, passed on from one generation to another. Statistics from the National Food Surveys show the extent of these, and also consumer preferences as far as food commodity groups are concerned. The Surveys have been running long enough to show something of consumer trends but, of course, they do not exhibit reasons—why consumers buy and use certain foods, their attitudes to food marketing practices, and, in particular, to advertising. Advertising claims, misleading undoubtedly but within the law, have long been a source of controversy between those who worship at the shrine of truth and others less particular. Elsewhere, we review a special study of consumer reactions to aspects of the grocery trade in the U.S.A., and note that 32 per cent do not accept advertisements as being true, but 85 per cent find them interesting and informative. Advertising practices are probably subject to less statutory control in the United States than here, and the descriptions and verbiage certainly reach greater heights of absurdity, but the British housewife is likely to be no more discerning, able “to read between the lines”, than her counterpart in that country. A major difference, however, is that in Britain, more houswives prepare and cook meals for their families than in the United States. The greatest importance of advertising is in the introductory phase of a commodity; new and more vigorous advertising is necessary later to delay the onset of the decline phase of the commodity's life cycle; to ensure that sales can be maintained to prevent rises in supply costs. Advertising helps considerably in the acceptance of a branded food, but housewives tend to ignore cut‐throat competition between rival brands, and what weans a consumer from a brand is not competition in advertising, nor even new and more attractive presentation, but reduction in real price. The main pre‐occupation of the woman of the house is food adequacy, and especially that her children will have what she considers conforms to a nutritious diet, without argument or rebellion on the part of her progeny and without distinction. She knows that bulk foods, carbohydrates, are not necessarily nutritious, although her ideas of which foods contain vitamins or minerals or other important nutrient factors tends to be hazy. She does not pretend to enjoy shopping for food and therefore tends to follow a routine; it saves time and worry. Especially is this so with young married women, who may have to take small children along. Each housewife has her own mental standard of assessing “value”, and would have difficulty in defining it. Nutritional value forms part of it, however, in most women, who connote their food provision with health. The greatest concern is not necessarily positive health, but prevention or reduction of obesity, which is seen among adult members of the family, especially growing girls, as an adverse effect on their appearance, and the types of clothes they can wear. A few of the more intelligent families have an indefinable fear of ischaemic heart disease and its relation to food. When they take positive steps to control the diet for these purposes, they are quite frequently in the wrong direction and rather confused even when this is done on medical advice.

The purpose of this paper is to review the advanced technologies and approaches for utilization of waste generated in dairy industry. Whey is highly contaminated, with a high organic load around 100,000 mg O₂/L COD (chemical oxygen demand), and is not used for further processing. The waste generated in different food industries can be utilized in different value addition product with the help of advanced technology.

Major well-known bibliometric information sources are the Web of Science, Scopus, Mendeley and Google Scholar. Several keywords like nutrition value of whey, whey utilization, whey valorization, whey technologies, whey beverages, fruit-based whey beverage, carbonated beverage, probiotic or alcoholic beverages, herbal beverage, fermented beverage and current scenarios were chosen to obtain a large range of papers to be analyzed. A final inventory of 126 scientific sources was made after sorting and classifying them according to different criteria based on topic, academic field country of origin and year of publication.

The comprehensive review of different literature, data sources and research papers seeks to find and discuss various sustainable solutions to this huge waste generated from milk industry. The sustainable use of whey for production and conversion in different types of products can uplift the bio-based economy of industries and thereof national/international economy. The recent upsurge in consumer interest for health-promoting products has opened up new vistas for whey beverages and other whey products research and development.

The paper draws out different sustainable characteristics and technology of whey products available in market, as well as potential products to be launched in the market. Interestingly, over the past few years, dairy industries have applied various technologies to process cheese whey and are in search of new products which can be prepared from the by-product. This review discusses on the recent research development of whey valorization with particular reference to technologies used in the addition to their commercial availability and a way forward.

The aim of this research is to analyse the literature on drinking water management in Mexico City and Singapore, considering water supply, institutional organisation and management, and rates so as to propose recommendations for improvement in the water management of the Mexico City.

The preferred reporting items for systematic reviews and meta-analysis (PRISMA) methodology is used to review the literature on drinking water management in Mexico City and Singapore in time periods from 1325 to 2021 and from 1819 to 2021, respectively, emphasising the contemporary part. The information search was realised through different prestigious databases and official documents from the governments of Mexico and Singapore, as well as international organisations. After analysing, 40 documents were included to discuss the results.

There is a contrast between water management in Singapore and Mexico City because Singapore has strong institutions coordinated with each other along with the private and social sectors and has efficient fundraising and infrastructure investment systems. Although they are cities that developed in different circumstances, a comparison between them allowed to glimpse some aspects that may be useful to replicate in Mexico City.

This research is novel because there is no comparative analysis like the one presented in the literature, so it is suggested to continue delving into the topics covered in future research to have more elements that allow improving drinking water management in Mexico City.