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Clarify the effects of potato flour (PF) addition on dough properties and quality characteristics of pie bread, thus providing a theoretical basis for potato-wheat-yogurt pie bread processing.

The seven pie bread formulations were prepared with addition of different amount of PF (0, 10, 20, 30, 40, 50 and 60 per cent) by replacing wheat flour (WF). The influence of replacement of PF with WF on the dough development, gas behavior, microstructural, gluten-starch interaction inside dough matrix and the nutritional and textural properties of pie bread was analyzed.

Compared to dough with WF, dough height was decreased significantly but total gas volume showed no significant difference with the addition of PF (10-60 per cent), and the dough height was decreased gradually with the increasing addition of PF (p = 0.0012). Scanning electron microscopy and confocal laser scanning microscopy showed that dough with 10-30 per cent PF revealed smooth surface and continuous network structure was also existed between starch and gluten, this was similar to the structure of wheat dough, while the surface was rough and the connection was not continuous when the PF addition was further increased from 40 to 60 per cent. Nuclear magnetic resonance showed dough with 10-60 per cent PF presented larger content of immobilized water compared to the wheat dough, and its content was also increased with the increasing addition of PF (p = 0.0008). Pie bread with 10-60 per cent PF exhibited lower fat, carbohydrate content and energy value compared to the wheat pie bread, and the fat, carbohydrate, energy was further decreased with the increasing addition of PF (p = 0.0012, 0.0002, 0.0007, respectively), while the dietary fiber content increased (p = 0.0011). In addition, specific volume and height/diameter ratio showed no significant difference in pie bread with 0-40 per cent PF, which were 2.1-2.4 cm³/g and 0.16-0.19, respectively (p = 0.004), whereas they were reduced significantly when the PF was increased to 60 per cent (p = 0.001, p = 0.002). In addition, the lightness (L) of pie bread decreased gradually with the increasing amount of PF, and the browning index was increased. Pie bread with 0-40 per cent PF showed similar hardness, springness and chewiness value, which were also increased when the PF was increased to 60 per cent (p = 0.001). The above results indicated that PF could improve the nutritional quality of pie bread, and the appropriate addition amount should be no more than 40 per cent.

The mechanisms of this study should be clarified for further study.

PF was an excellent food ingredient and could be used for pie bread making at 30 per cent replacement level to overcome use of WF.

The results of this study can provide a new kind of potato staple food with high nutrition and low energy for market and consumers.

PF was first used to produce yogurt pie bread to improve the nutritional properties of traditional WF yogurt pie bread.

The purpose of this study is to examine the effect of calcium-rich ingredients such as sesame, skimmed milk powder, moringa leaves, cumin seeds and finger millet on flour, dough and breads with the objective of developing bread with higher calcium content and to investigate whether it maintains quality traits that guarantee its acceptability by consumers by testing textural, scanning electron microscopy and nutritional and sensorial parameters.

Refined flour was fortified with skimmed milk powder (SMP), sesame, moringa leaves and cumin (T1), SMP, sesame and malted finger millet (T2) and SMP and sesame (T3). Refined flour dough and breads served as control (C). The physicochemical, textural, scanning electron microscopy, nutritional and sensory parameters of flour, dough and breads were evaluated.

Significantly (p < 0.01) higher stickiness values of dough were obtained by refined flour dough-C (50.3 N); refined flour dough fortified with SMP and sesame - T3 (42.2 N); Refined flour dough fortified with sesame, SMP and malted finger millet -T2 (38.4 N); and refined flour dough fortified with sesame, SMP, moringa leaves and cumin -T1 (33.5 N). Oven spring in breads was 1.4 in C and decreased significantly (p < 0.01) to T3-1.0, T1-0.9 and T2-0.8. Chewiness values of T3 (4.1) was similar to C bread, whereas T1 and T2 showed significantly (p < 0.01) lower values. Scanning electron microscopy images of bread microstructure showed fortification of bread resulted in intermittent but more prominent gluten structure in test breads than control. The highest calcium content was observed in T1 (268 mg/100 g), followed by T2 (231 mg/100 g) and T3 (211 mg/100 g). The incorporation of dried moringa leaves and cumin seeds enhanced the appearance, aroma, taste and flavor of T1.

The study shows that texturally and sensorially acceptable nutritious breads can be produced through natural fortification. Nutrients from naturally fortified foods are better absorbed and assimilated by the body. Calcium-fortified breads, each with its own distinctive taste and texture, showed high values in the sensory evaluation test.

The incorporation of calcium and protein-rich ingredients such as SMP, moringa leaves, cumin, malted finger millet and sesame would yield calcium enriched breads superior to the commonly consumed plain refined wheat flour bread with respect to textural, nutritional, functional and sensory attributes and have high potential to alleviate calcium deficiency in vulnerable groups.

The purpose of the paper is to study the effect of the gliadin and glutenin fractions of gluten on the cookie quality.

Ten different wheat varieties were analyzed for the flour physicochemical characteristics, gluten composition and rheological properties. The different flours were baked into cookies. The cookies were analyzed for spread ratio and texture. Relationships of various flour parameters, gluten composition and cookie characteristics were determined.

Gluten subfractions, damaged starch, protein, AWRC values were significantly correlated to the cookie spread and texture. Damaged starch (r=−0.638), protein (r=−0.508) and AWRC (r=−0.844) had a negative relationship with the cookie spread. The flours with higher SDS sedimentation value also produced cookies with lower spread ratio and harder texture. The study clearly demonstrated a positive correlation between Gli:Glu ratio (r=0.765) and spread ratio and a negative correlation (r=−0.528) with hardness of the cookies measured in terms of breaking force. Flours with lower dough development time and dough stability performed better as cookie flours.

The gliadins and Gli/Glu ratio had a significant effect on the cookie spread and texture and the prediction equation developed during the study could accurately predict the cookie spread from the Gli/Glu ratio and AWRC values.

In this article the author discusses the various points at which corrosion occurs in the bakehouse plant and mentions the probable factors involved. The three main sections of the baking industry are covered, viz. bread making, flour confectionery (cake making) and biscuit making. An increasing number of bakers are now beginning to realise that metallic corrosion need not be an inevitable occurrence of conditions of the bakery, and the following article, by a member of the staff of the British Baking Industries Research Station, will help bakers to avoid this unnecessary waste of money.

The purpose of the study was to discover whether incorporating flours with high nutritive value along with pre-treatment of cereals with nixtamalization and sprouting of legumes would result in a high-quality healthy alternative for corn-based snacks.

Flours of nixtamalized cereals-corn, wheat, rice and sorghum and sprouted legumes-soybean and green gram are made into dough and baked instead of fried to form multi-grain chips. The particle size and physical properties of flour and nutritional, functional and textural properties of dough and chips are tested to study the effect of combination of nixtamalization of cereals and sprouting of legumes in the development of chips.

Baked multi-grain chips made of nixtamalized cereals and sprouted legumes had a significantly (p < 0.05) smaller particle size of 24.6 µm compared to T1 24.8 µm, C1 29.3 µm and C2 31.7 µm. T2 and C2 had significantly (p = 0.05) lower OAC value than C1 and T1 due to nixtamalization as nixtamalized flour needed half the amount of oil during dough formation. T1 showed highest calcium (mg/100 g) of 466 which was significantly (p < 0.05) higher than all other groups. The overall acceptability of T2 (8.6) was significantly (p < 0.05) higher than T1 (7.8), C2 (7.4) and C1 (6.8) on the nine-point Hedonic scale.

The developed chips are superior in terms of higher protein and minerals with better organoleptic acceptability and lower fat content in comparison to both corn chips and nixtamalized corn chips. The multi-grain chip therefore offers a new option for the consumer in high-quality healthy alternative to corn-based fried snacks.

The purpose of this paper is to evaluate some common bread improvers (normally used for 100 per cent wheat bread) for their effect on the quality attributes of wheat-cassava (90:10) composite bread.

Four commonly used bread improvers (ASA, ABT, EDC and PTB) in Nigeria were evaluated for their effect on the baking potential of wheat-cassava (90:10) composite flour. Bread samples were baked from wheat-cassava (90:10) composite flour, with and without bread improvers. Changes in dough height during fermentation, oven spring, yield and specific volume of bread samples were determined. Bread samples were also evaluated for their sensory and staling characteristics.

Results showed that dough height during fermentation did not change significantly (p<0.05) and crumb colour, firmness, taste and aroma were unaffected by addition of bread improvers; but oven spring, yield, specific volume, bread shape, crust colour, texture and overall acceptability of bread were significantly different (p>0.05). All the bread improvers except ABT extended the shelf life of wheat-cassava (90:10) composite bread for a period of 24-48 hours.

Bread improvers normally used for 100 per cent wheat bread could be used effectively for wheat-cassava (90:10) composite bread without an adverse effect on quality of bread.

Bread makers need little or no additional training to handle wheat-cassava (90:10) composite flour for bread making process hence, Nigeria can sustain her policy of using wheat-cassava composite flour for baking without any serious technical problem.

Gluten is the nitrogenous part of the flour of wheat which remains behind as a sticky, cohesive substance when the starch is removed by kneading a flour dough in a current of water.

This paper aims to review the types of pizza and the functionality of basic ingredients of pizza with special focus on the effects of pizza toppings on health.

Phenomenological research has raised awareness and increased insight into the role of various pizza ingredients and health benefits of different pizza toppings and consequently pizza is called a “functional food”. The approach is based on observation of the online research, a close watch on the pizza industry, analysis of research papers in journals, and brainstorming research on the effect of packaging on the quality of different pizza ingredients with a co‐researcher for four years.

The changing life patterns and food habits of people and their preferences have catapulted the market to grow for convenience and fast foods. Pizza is one of the most popular family foods worldwide and has gained widespread consumer acceptance as a healthy and convenience food. It is a multi‐component product with composite number of toppings. It provides an array of nutrients in significant amounts, in relation to its energy and fat content, making it a nutrient‐dense food. It is cheap and can be delivered in a very short time. In particular, pizza supplies 30 per cent of the USA recommended daily allowance of vitamins A, C, B₂, calcium and protein. It contains 50 per cent of vitamin B₁ and 35 per cent of iron. Furthermore, pizza has anticancerous effects beyond the basic nutrition it provides, because of the potent antioxidant lycopene present in tomatoes.

This paper offers a holistic view that would guide a reader to identify the beneficial effects of pizza.

Numerous food recalls and outbreaks were associated with wheat flour in recent years. Few consumers are cognizant of food safety risks associated with raw flour. The purpose of this study is to evaluate the food safety information and flour-handling behaviors presented in popular food blog recipes and in YouTube videos using cookie, cookie dough and egg noodle recipes as examples.

Eighty-five blog recipes and 146 videos were evaluated. Blog author and video host food-handling experience was classified as professional or nonprofessional. Food safety information and food-handling behaviors were evaluated for adherence to government and scientific recommendations.

Blog authors and video hosts demonstrated higher awareness of food safety risks associated with raw eggs compared to raw flour, which only translated into better adherence with recommended food-handling behaviors during ingredient addition steps. Cross-contamination from adding raw flour to the product was observed in 25% of videos, whereas cross-contamination from hosts adding raw shell eggs was observed 3% of videos. Blog authors and video hosts did not recommend or demonstrate handwashing after handling raw shell eggs nor raw flour, and fewer than 5% provided recommendations for cleaning work surfaces. Heat treatment methods to convert raw flour into ready-to-eat products were mentioned by 24% of blog authors and 18% of video hosts; however, the recommendations were not scientifically validated.

This study demonstrates the need to develop educational interventions that increase blog authors' and video hosts' awareness of risks associated with raw flour and that translate this knowledge into practiced behaviors.

The shortage of grain, reflected by an increase in the rate of extraction in milling and then by the rationing of bread, has fully aroused the attention which it warrants. Avoidance of wastage, always important, now becomes imperative. In view of this, notes in connection with the occurrence of “rope” in bread which were recently made available to members of the baking industry by the Ministry of Food may be even more important than the warnings issued in previous years. The disease is associated with warm weather and develops most rapidly at about 100°F. The first of the symptoms is usually the development in the bread of a faint fruity odour, resembling that of an over‐ripe pineapple, which becomes more intense as the bread gets older. Discolouration and softening of the crumb next occurs, so that on attempting to cut the bread it tends to stick to the knife. When the crumb is pulled apart, fine gelatinous threads may be formed. Although an outbreak of “rope” is unpleasant, there is fortunately little or no evidence that such an occurrence is dangerous to health. The disease can of course occur in cakes and similar bakery products, but outbreaks are practically always confined to bread. The comparative immunity of cakes is probably due to a generally lower moisture content, which does not encourage development of the disease. Another possibility is that fruit, where present, may cause the development of a certain amount of acid, and acid conditions discourage the activity of the organism responsible for the trouble. “Rope” in bread is caused by the spore‐forming bacterium B. mesentericus. It has been suggested the disease is due to the decomposition of the starch by amylase, in which the organism is rich. There are several strains of this bacterium, which is of widespread occurrence—it is found, for example, in the soil. All kinds of flour, whether of high or of low extraction, and including those derived from cereals other than wheat, are possible carriers of the disease. However, carefully‐conducted experiments have shown that the “rope” spore content of the flour, unless particularly high, is of minor significance when outbreaks of “rope” occur. Far more important are the conditions under which the bread is made and under which it is treated after baking. It has been found that “rope” formation is more likely to develop in the dense crumb associated with under‐fermentation than in loaves in which the crumb is well‐developed. Use of sufficient yeast to cause the fermentation to be vigorous has also been found to be beneficial. The initial development of the organism appears to be at the expense of the soluble nitrogen compounds, sugars, etc., present in the bread. When these materials are exhausted, attack upon the protein of the loaf proceeds. A possibility is that prolonged fermentation causes a partial transformation of the gluten into nitrogenous substances which are more easily assimilated by the bacteria, whereas in a short, vigorous fermentation the formation of such substances may not occur to the same extent. Occurrences of the disease may be expected to be more severe with high extraction flours or whole‐meals, since higher extraction gives a medium which is better suited for the growth of the “rope”‐causing organism. All the members of the mesentericus group are characterised by the formation of spores which are extremely difficult to destroy by heating. For example, the spores can resist the temperature of boiling water for hours on end. Since the interior of a loaf probably does not exceed this temperature whilst in the oven, many of the spores will escape destruction. The spores will thus pass through the operation of baking and, if conditions are favourable, the development of the disease will start at or near the middle of the loaf. Since the damp, soggy crumb associated with an under‐baked loaf is conducive to the development of “rope,” thorough baking is a definite advantage. Owing to the fact that the “rope” organism requires warmth for its growth, rapid and thorough cooling of the bread in well‐ventilated cooling rooms is an important preventative factor. Spacing upon the racks should be such that the loaves do not touch, and the latter should not be packed whilst warm into delivery vans. Cleanliness is also of vital importance. Odd scraps of bread, dried dough, etc., may contain the spores of the organism and contact of the loaves with such material will lead to contamination which may bring to nought the preventative efforts made in other directions. Since the “rope” organism does not like acidity, addition to the bread dough of acidic substances is a useful deterrent. Acetic acid and acid calcium phosphate are particularly useful in this connection, since the requisite concentrations of these substances do not cause deterioration in bread quality. Bakeries with sackages below 100 per week may obtain without permit acetic acid solution of strength suitable for immediate addition. For larger users, the acid is supplied in a more concentrated form against a permit obtainable from the Directorate of Molasses and Industrial Alcohol, and is diluted before adding to the mixing. Though acetic acid or acid calcium phosphate may be used to suppress outbreaks or as preventatives during exceptional conditions, supplies of these agents are insufficient to enable them to be used continually as general preventatives during hot weather. For this purpose, the “acid dough” process of the British Arkady Co. Ltd., which requires no special materials, is recommended by the Ministry of Food. A small batch of “starter” dough is first prepared and is then incorporated into a larger mixing of “acid dough.” Portions of the latter are then added to the main mixing of bread dough, no alteration in the other constituents of the latter being required. Once the “acid dough” has been prepared, daily supplies may be kept up for months. A portion of the dough from the previous day is used as a starter for the new mixing, and from the second day onwards the “acid dough” becomes a fairly‐stabilised producer of acid.