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This study aims to focus on the use of pectinase enzymes for producing clarified mango juice with blend of orange juice and to evaluate some of its quality attributes.

Mango pulp was incubated at 60^oC for 1 hr to destroy natural enzymes present in the juice. Prepared mango pulp and separately prepared orange juice were formulated into various mixes in the ratio mango:orange (v/v) 100:0, 50:50 and 0:100. A portion of the mango pulp or the one with equal volume of orange was then treated with 0.1 per cent (v/w) pectinase enzymes at 40^oC for 24 hrs. All the treated and untreated mixes were separately packed inside a bottle and pasteurized at 80^oC for 10 mins. Samples were analyzed using methods reported in the literature for some chemical and sensory properties.

From this project work, the use of enzyme (pectinase) in juice production from mango was found beneficial and profitable since it increases the yield of juice extracted. A blend of mango and orange juice which was processed with enzyme was found not to be significantly different from orange juice in terms of sweetness, appearance, flavour and general acceptability.

The paper has demonstrated effect of pectinase enzymes in the production of clarified mango juice with blend of orange juice and its acceptability.

The purpose of this paper is to analyze international orange trade as different types of orange juice seem to obtain the favor of newer food consumption patterns as opposed to fresh oranges. In addition, the authors will outline market tendencies that could be useful to stakeholders interested in any way in the sector.

This document uses the Lafay index (LFI) in order to evaluate the intra-sectoral trade specialization; however, the social network analysis (SNA) approach is used to connect the international trade relations and to refine, classify and prioritize the countries having a central role in the orange juice world trade network. For both indexes, UNCOMTRADE has been used.

The findings show that the growing orange juice trade is the leading global growth factor as opposed to the sale of fresh oranges. It appears that major trade revenues come from orange juice concentrate (Frozen Concentrated Orange Juice (FCOJ)). Business takes place mostly in Europe.

This study shows for the first time that the current orange juice export competitiveness is crucial to the long-term survival of the orange sector. This study valuably contributes to the less known literature regarding FCOJ and Not From Concentrate orange juice trade relevance.

The purpose of this paper was to evaluate the impact of some labeling aspects on the consumer intent to purchase ready to drink orange juice and nectar.

The influence of label information on the consumer intent to purchase was evaluated by conjoint analysis using a convenience sample (n=149). A factorial design with four characteristics, price, brand, information about the product and kind of beverage, was used. Three levels were established for brand and product information, and two for price and kind of beverage.

Low price, product information and market leading brand had positive impact. “No preservatives/natural” was the information that most influenced consumer's purchase intent. The ideal label showed the leading brand, low price and information “no preservatives/natural”. These results could be useful for strategic planning of consumer instruction and have important implications for Brazilian orange juice manufactures.

Although the most widely consumed beverages in Brazil are ready to drink orange juice and nectar, it was unexpected that consumers did not know the differences between them and that kind of beverage was not an important factor for the purchase decision.

The purpose of this study was to evaluate beet and orange mixed juices added with lyophilized Lactobacillus acidophilus probiotic culture.

Two formulations of probiotic beet and orange mixed juices (1:1 e 1:2 v/v) were prepared, stored at 4°C for 28 days and were evaluated for probiotic survival, physicochemical stability, antioxidant activity and sensory acceptance. The probiotic culture was added in a lyophilized form and was not propagated in culture media or juice.

Physicochemical characteristics (pH, titratable acidity, total soluble solids and color) and antioxidant activity showed no undesirable alterations during storage. The number of probiotics followed established minimum requirement for probiotic foods (10⁹ CFU/200mL) during the 28 days of storage. The juices showed good sensory acceptance and purchase intention, especially regarding the color of the product.

The beet and orange mixed juices are suitable carriers for L. acidophilus with a shelf life of at least 28 days at 4°C.

Direct addition of the probiotic culture could result in high probiotic survival in mixed juices, dispensing the propagation step.

Pumpkins are a rich source of essential nutrients, namely, β-carotene, minerals and vitamins, and they are therefore suitable for making functional juice. This study aims to develop pumpkin-based functional juice and assess the acceptability of the product by various consumers. In total, 55 per cent of the panelists disliked the pumpkin juice because of its strong off-flavor. Consequently, different blends of pumpkin juice with mango, orange, strawberry and green apple juices were prepared and evaluated for global appreciation and descriptive sensory analysis.

Pumpkins, green apples, mangos, oranges and strawberries were obtained from the local market. Four mixtures of juices were prepared by mixing pumpkin and mango juice (750/250, v/v), pumpkin and green apple juice (750/250, v/v), pumpkin and orange juice (750/250, v/v) and pumpkin with strawberry and orange juice (750/125/125, v/v/v). The contents of moisture ash, fiber, carbohydrate, crude protein and lipids were estimated according to AOAC methods. β-Carotene, vitamin C and minerals were determined. A semi-trained panel consisting of 100 members assessed sensory characteristics of pumpkin juice and mixtures using a quantitative descriptive analysis method (QDA) for different attributes.

The findings show that the moisture, crude protein, fiber, ash and carbohydrate contents indicate that the developed pumpkin juice was rich in these essential nutrients. The fiber value in our study was lower than the value previously reported for pumpkin. The content of β-carotene and vitamin C in the developed pumpkin juice was considerably higher than that reported previously for fruits. The values of calcium and iron of the current study were much higher than those previously reported in vegetable juices and mixtures. The sensory results revealed that the developed pumpkin-based juice blends are acceptable by the consumers.

This study was carried out to develop a suitable formula for preparing functional juices from pumpkin, which is not consumed willingly by children and the elderly; the authors aimed to improve its taste and flavor by mixing it with different fruit juices. The results demonstrated that pumpkin juice is rich in essential nutrients such as vitamins, minerals and antioxidants, suggesting its health-promoting potential. Mixing pumpkin juice with mango juice or orange and strawberry juices significantly improved the sensory quality of the products. Strikingly, the formulated pumpkin juice mixtures received good acceptance and appreciation by children and the elderly, which could promote its use as a functional juice. Generally, pumpkin-based juice blends are rich in vitamins, minerals and antioxidants and can therefore be consumed as a functional beverage with potentially increased health-promoting characteristics. Using pumpkin for developing functional juices could add commercial value to pumpkins. Future studies should specifically focus on large-scale production and commercialization of these juice mixtures.

This paper aims to study the importance of polyphenols in human health and, based on recommendations on the replacement of carbonated drinks with nutritious beverages, like fruit juices, seeks to compare the polyphenol contents of natural and commercial juices.

The total polypheol content of 39 fresh and 159 commercial (100 percent and less than 50 percent) fruit juices was analyzed by the terbium sensitized fluorescence method. The ANOVA with Tukey post hoc test, and also an independent t‐test, were used for statistical analyses.

The mean polyphenol contents of fresh juices were significantly (p<0.001) higher than those of 100 percent commercials (5.34±2.7 vs 3.28±0.86 mg/l). In fresh juices the concentration ranged from 1.06±0.08 (pineapple) to 10.14±0.07 (sour cherry) mg QE/100 ml, while in 100 percent commercial juices the range was from 2.37±0.05 (orange) to 5.34±0.4 (pomegranate) mg QE/100 ml, and in <50 percent commercial juices they ranged from 1.04±0.7 (red grape) to 2.21±0.07 (white grape) mg QE/100 ml. The polyphenol contents of dark juices, in both fresh and commercial products, were significantly higher than others (p<0.001) and most fresh fruit juices possessed higher amounts of polyphenol than commercial ones. Although various juices differed in the quantity of total polyphenol, they can be considered as a good source of functional beverage.

This paper provides information about the polyphenol content of fresh and commercial (100 percent and <50 percent) fruit juices. To the best of the authors' knowledge, there have been no articles which aim to compare the polyphenol content of Iranian fresh and commercial fruit juices. For analysing the polyphenol contents, the newly developed terbium sensitized fluorescence method was used, and also the applicability of this new method was compared with the commonly used Folin‐Ciocalteau method.

The purpose of this paper is to assess the growth and viability of Lactobacillus rhamnosus GR-1 (L. rhamnosus GR-1) in carrot juice (CJ), carrot apple juice (CAJ), carrot orange juice (COJ) and carrot beet juice (CBJ) over 72 h of fermentation and 30 days of refrigerated storage at 4°C. The secondary objective is to evaluate sensory properties.

Four vegetable juice samples were inoculated with the probiotic strain L. rhamnosus GR-1 and fermented for 72 h. To observe the samples’ storage ability, the samples were refrigerated for 30 days. Microbial enumeration was conducted throughout the fermentation and storage periods to determine the viability of L. rhamnosus GR-1. Sensory evaluation with 106 participants was also conducted to assess the consumer acceptability of the vegetable juices.

All tested samples achieved mean microbial counts of at least 109 CFU/ml. During the 72-h fermentation period significant differences in microbial counts in juices CJ (p = 0.001), CAJ (p = 0.031), COJ (p = 0.047) and CBJ (p = 0.001) were observed. Over the 30-day storage period, significant differences in microbial counts were only found in juices CJ (p = 0.001) and COJ (p = 0.019). A significant decline in pH (p = 0.001) was also observed during 72 h of fermentation and 30-days of cold storage. Sensory evaluation of all juices showed significant differences in sensory attributes such as appearance (p = 0.001), flavour (p = 0.001), texture (p = 0.001) and overall acceptability (p = 0.001). Sensory results showed that the probiotic CBJ and CJ had the highest hedonic scores for flavour, texture and overall acceptability (p = 0.001) among participants. This study demonstrated that non-dairy vegetable juices could be an alternative to dairy-based probiotic products.

Commercially available probiotic dairy-based foods make up a large sector of the consumer market. However, the growing consumer interest in healthful eating has led to an increased demand for plant-based products. The probiotic L. rhamnosus GR-1 provides numerous therapeutic benefits, such as reducing the recurrence of bacterial vaginosis, yeast and urinary tract infections. The results of this study may have a significant influence on the health of individuals, especially in less economically developed countries.

Heat also facilitates the transmission of water through the cell walls, thereby assisting its passage from the interior to the surface of the material; it increases the vapour pressure of water, thus increasing its tendency to evaporate; and it increases the water‐vapour‐carrying capacity of the air. In the United States the unit of heat customarily used is the British thermal unit (B.t.u.), which for practical purposes is defined as the heat required to raise the temperature of a pound of water 1° F. Heat is commonly produced through the combustion of oil, coal, wood, or gas. Heating by electricity is seldom practicable because of its greater cost; but where cheap rates prevail it is one of the safest and most efficient, convenient and easily regulated methods. Direct heat, direct radiation and indirect radiation are the types of heat generally employed. Direct‐heating systems have the highest fuel or thermal efficiency. The mixture of fuel gases and air in the combustion chamber passes directly into the air used for drying. This method requires the use of special burners and a fuel, such as distillate or gas, which burns rapidly and completely, without producing soot or noxious fumes. The heater consists simply of a bare, open firebox, equipped with one or more burners, an emergency flue to discharge the smoke incidental to lighting, and a main flue, through which the gases of combustion are discharged into the air duct leading to the drying chamber. Direct‐radiation systems also are relatively simple and inexpensive and have a fairly high thermal efficiency. A typical installation consists of a brick combustion chamber with multiple flues, which carry the hot gases of combustion back and forth across the air‐heating chamber and out to a stack. The air is circulated over these flues and heated by radiation from them. The flues are made of light cast iron or sheet iron. The air‐heating chamber should be constructed of fireproof materials. The efficiency of the installation depends upon proper provision for radiation. This is attained by using flues of such length and diameter that the stack temperatures will be as low as is consistent with adequate draught. Heating the air by boiler and steam coils or radiators is an indirect‐radiation system, as the heat is transferred from the fuel to the air through the intermediate agency of steam. Such a system costs more to install and has a lower thermal efficiency than either of the other two systems. It is principally adapted to large plants operating over a comparatively long season on a variety of materials where the steam is needed to run auxiliary machinery or to process vegetables. Large volumes of air are required to carry to the products the heat needed for evaporation and to carry away the evaporated moisture. Insufficient air circulation is one of the main causes of failure in many dehydrators, and a lack of uniformity in the air flow results in uneven and inefficient drying. The fan may be installed to draw the air from the heaters and blow it through the drying chamber, or it may be placed in the return air duct to exhaust the air from the chamber. An advantage of the first installation is that the air from the heaters is thoroughly mixed before it enters the drying chamber. It has been claimed that exhausting the air from the chamber increases the rate of drying by reducing the pressure, but the difference is imperceptible in practice. Either location for the fan is satisfactory, and the chief consideration in any installation should be convenience. Close contact between the air and the heaters and between the air and the material is necessary for efficient transfer of heat to the air and from the air to the material, and to carry away the moisture. The increased pressure or resistance against which the fan must operate because of such contact is unavoidable and must be provided for, but at other points in the system every effort should be made to reduce friction. To this end air passages should be large, free from constrictions, and as short and straight as possible. Turns in direction should be on curves of such diameter as will allow the air to be diverted with the least friction. The general rule in handling air is that a curved duct should have an inside radius equal to three times its diameter. The water vapour present in air at ordinary pressures is most conveniently expressed in terms of percentage of relative humidity. Relative humidity is the ratio of the weight of water vapour actually present in a space to the weight the same space at the same temperature would hold if it were saturated. Since the weight of water vapour present at saturation for all temperatures here used is known, the actual weight present under different degrees of partial saturation is readily calculated from the relative humidity. Relative humidity is determined by means of two thermometers, one having its bulb dry and the other having its bulb closely covered by a silk or muslin gauze kept moist by distilled water. Tap water should not be used because the mineral deposits from it clog the wick, retard evaporation, and produce inaccurate readings. The wick must be kept clean and free from dirt and impurities. The two thermometers are either whirled rapidly in a sling or used as a hygrometer mounted on a panel with the wick dipping in a tube of water and the bulbs exposed to a rapid and direct current of air. The relative humidities corresponding to different wet‐ and dry‐bulb temperatures are ascertained from charts furnished by the instrument makers, or published in engineers' handbooks. As a general rule, the more rapidly the products have been dried the better their quality, provided that the drying temperatures used have not injured them. Some fruits and vegetables are more susceptible to heat injury than others, but all are injured by even short exposures to high temperatures. The duration of the exposure at any temperature is important, since injury can be caused by prolonged exposure at comparatively moderate temperatures. The rate of evaporation from a free water surface increases with the temperature and decreases with the increase of relative humidity of the air.

The purpose of this paper is to develop a structural model of factors determining quality of juices and to indicate major variables that are significant for further product development.

Juices of apples, oranges, grapefruits, black currants and mixed fruits were subjected to testing in order to determine the qualitative structure of fruit juices. The following determinations were carried out in all fruit‐juice samples: total solids (Brix), Brix other than sucrose, total acidity, pH, vitamin C content, total sugars, direct‐reducing‐sugar content, saccharose content and volatile acidity. In addition, a sensory assessment in a 5‐grade score scale was carried out, covering the sensory characteristics of taste, flavour and colour. Based on the results of sensory analysis, a total sensory quality index (TSQI) was calculated.

Values of the linear correlation coefficient were calculated, and force and direction of the interdependence between the measured juice quality factors were determined. Analysis of major components was applied to develop a model of the structure of quality characteristics of fruit juices and to disclose latent variables. It enabled disclosure of four independent (orthogonal) areas, which determine the quality of fruit juices, and explain 70 per cent of the total juice quality area. They are represented by: total sugars, total solids (Brix), sensory quality and total acidity.

The research enabled identification of factors determining the fruit juice quality. It may prove very useful for R&D departments, as it informs an enterprise of which areas to focus their product development efforts on. Reducing the number of the major factors to four reduces costs and shortens the time necessary for product design and development.

Mr. H H. Bagnall, B.Sc., F.I.C., Public Analyst for the City of Birmingham, comments in his annual report on the work done at the City laboratory and on the still apparent need for standards and definitions of food, and of legislation to enforce their application in manufacture or in shops. Of the 5,472 samples taken in the city under the Sale of Food and Drugs Acts 4 per cent. were found to be adulterated, but he observes that misdescription of articles of food is much more common than actual adulteration. The number of samples taken during the year was larger, and the variety greater, than in any previous year. About 140 different varieties of foods and drugs were examined, and few, if any, foods were not sampled. It was reassuring to learn that the Minister of Health was considering the introduction of legislation on the lines of the recommendations submitted in 1934 by the Departmental Committee which enquired into the working of the law as to the composition and description of articles of food other than milk. Ice‐cream was a case in point. In fifty‐one samples taken, the fat content varied between less than 2 per cent. and 19 per cent. Roughly, the samples were of two classes. Those containing less than 4 per cent. were bought mainly from carts in the streets of parks, and were probably the products of smaller makers; those with more than 8 per cent. were manufactured on a large scale by a few well‐known firms. “It is obvious something is wrong here,” Mr. Bagnall reports. “Apart from any question of price, ice cream is, or should be, a valuable article of food, and the purchaser should have some means of knowing what to expect when he asks for it. At the moment he may get a substance which approximates to frozen custard (not made with eggs !) or he may get a really first‐class product containing a considerable amount of cream. The position is similar with respect to a number of other products, particularly compounded articles; and the beneficial effect of legislation in such matters is clearly shown in the case of condensed and dried milks. This kind of governmental interference with manufacture used to be thought of as grandmotherly legislation; but, when one remembers the sort of statement, bearing no relation to the contents, that used to appear on tins of condensed milk, one cannot but feel that there may be some virtue in these departures from laisser‐faire methods. At any rate, no one would wish to return to the old haphazard days when condensed milk was simply what the manufacturers chose to make it. It is curious that the law is far more careful that the composition of feeding stuffs sold for the use of cattle should be made known to the purchaser than that articles sold for human consumption should be sold under a guarantee of quality. If I buy, say, cotton cake for feeding cows, the vendor is bound to give me an invoice stating the amounts of oil, protein and fibre contained in it, and severe penalties are entailed if false statements are made. If I buy an infant's food, however, there is no compulsion on the part of the maker to give particulars regarding its composition. In fact, the label may contain statements entirely at variance with the analysis, but which, nevertheless, are of too vague a character to become the subjects of police court proceedings. It is surely as important that the mother of a child should know something of the composition of the food she uses as that a farmer should know the food value of his cattle cakes, and it is to be hoped that legislation on such matters may not be unduly delayed. The misdescription of articles of food is a much more common thing than adulteration. Under modern conditions of inspection and sampling, it simply does not pay manufacturers and retailers to risk the cruder forms of adulteration and substitution, but the wide use of advertising as an aid to sales, often leads to the use of exaggerated statements regarding the quality and food value of articles of diet. We are all familiar with the extraordinary claims put forward on behalf of particular foods of well‐known composition which seek to show that they possess unique properties not shared by other similar foods. It is often impossible for the food analyst to check such statements, and the public is deceived into thinking that a superior article is being obtained. Often it is only in the advertisements relating to the article in question that one finds these exaggerated statements, and when a tin or packet is bought it is found that the label gives a much milder description of the contents. Under the present law only statements appearing on the label can be made the subject of legal proceedings. It is desirable that false claims appearing in advertisements should also be brought within the scope of food and drug legislation.” During the year a number of samples of pasteurised milk were examined by the “phosphatase test.” Of 112 samples, fifty‐eight were efficiently pasteurised; in thirty‐six cases some technical error had occurred during the process, such as imperfect temperature or time control, or a small admission of raw milk; and in the remaining eighteen cases there was evidence of gross negligence. The samples were taken at selected times and places thought likely to yield abnormal figures, so that too much weight should not be given to the fact that about 48 per cent. of the samples did not pass the test.”