Physical-chemical and Microbiological Characteristics of Organic Strawberries Conserved with Biofilms and Refrigeration

2012 ◽  
Vol 1 (3) ◽  
pp. 247
Author(s):  
Raquel Pires Campos ◽  
Angela Kwiatkowski ◽  
Carolina Dario Tonhi ◽  
Edmar Clemente

Biodegrabable and edible coatings were applied on fresh strawberries (<em>Fragaria </em>x <em>ananassa Duch</em>), ‘Camarosa cultivar’, produced in organic system and stored at 10ºC for nine days. Color, mass loss, incidence of rottenness and chemical analyses contents was evaluated. Suspension of cassava starch and grains of kefir milk reduced evolution of fruit coloration when compared uncoated fruits. Treatment associated cassava starch and kefir liquid resulted in a lower rottenness incidence and less mass loss of the fruits, is therefore recommended for postharvest organic strawberries. Anthocyanin and titrable acidity contents increased during storage, regardless of the treatments in general.

2013 ◽  
Vol 33 (1) ◽  
pp. 30-39 ◽  
Author(s):  
Sandriane Pizato ◽  
William Renzo Cortez-Vega ◽  
Juliana Tais Andreghetto de Souza ◽  
Carlos Prentice-Hernández ◽  
Caroline Dellinghausen Borges

2019 ◽  
Vol 16 (31) ◽  
pp. 335-340
Author(s):  
Elen Vanessa Costa da SILVA ◽  
Igor Fernando de Araújo REIS ◽  
Leandro das Neves Tolosa de ALMEIDA ◽  
Alan Reis dos PRAZERES ◽  
Josyane Brasil da SILVA ◽  
...  

Due to the increase in the consumption of natural products, there has been a growing use and commercialization of bee pollen, thus, the need for a greater quality control regarding the physical-chemical and microbiological characteristics of this product is justified. In this way, the research aimed to determine the physical-chemical, microbiological and sensorial characteristics of four brands of dehydrated pollen, marketed in natural products houses in different parts of the city of Belém-Pará. Microbiological (aerobic mesophilic bacteria, fungi and yeasts, Coliformes at 45°, Salmonella sp and Staphylococcus aureus) and sensorial analyzes were carried out in the physicochemical analyzes (moisture, ashes, lipids, proteins, pH, free acidity, total sugars). The results obtained were within the parameters of quality allowed by the Brazilian legislation for dehydrated pollen. Regarding the microbiological analysis, all brands showed absence of Staphylococus aureus and Salmonella spp. For the sensorial analysis, the C mark presented better results for both flavor and aroma, confirming the quality of the dehydrated pollen commercialized in Belém-Pa.


Author(s):  
M. U. Sousa ◽  
L. M. R. Lima

<p>Nos últimos anos, a preocupação com as questões ambientais vem sendo bastante discutidas, onde merece destaque, o descarte indevido do esgoto doméstico no meio ambiente, portanto o presente estudo objetivou realizar a caracterização físico-química e microbiológica do esgoto descartado no solo, no Centro de Ciências e Tecnologia da Universidade Estadual da Paraíba, campus de Campina Grande – PB. Para tanto foram desenvolvidas análises físico-químicas, tais como pH, Fósforo Total, DBO, DQO, Nitratos, Nitritos, Nitrogênio Amoniacal, Orto-Fosfatos e Alcalinidade, bem como análise microbiológica (coliformes). Observou-se que o efluente na unidade em questão não recebe tratamento para seu descarte, sendo identificadas características físico-químicas e microbiológicas de esgoto <em>in natura</em>. Faz-se necessário desta forma, investimentos em análises periódicas para assim realizar um tratamento adequado ao efluente visando-se reduzir os riscos ambientais e de saúde pública. Após os resultados das análises, foi proposto, além do tratamento preliminar, um tratamento biológico para o efluente, do tipo, lagoa facultativa primária seguida de duas lagoas de maturação, onde a eficiência do tratamento nos parâmetros analisados se enquadra aos padrões estabelecidos pelo CONAMA 430/2011, na qual o efluente pós - tratado poderia ser reutilizado para fins menos nobres, destinando a água potável para atividades que requerem uma qualidade melhor.</p><p><strong><em>Physicochemical and microbiological characterization of wasterwater of the UEPB with proposed of treatment for reuse purposes</em></strong></p><p><strong>Abstract</strong><strong>: </strong>In recent years, concern about environmental issues has been widely discussed, which deserves mention the improper disposal of domestic sewage into the environment, so this study aimed to perform the physicochemical and microbiological sewage discarded the soil, in the Science and Technology Center of the State University of Paraiba, campus of Campina Grande - PB. Therefore, we developed physical-chemical analysis such as pH, Total Phosphorus, BOD, COD, Nitrate, Nitrite, Ammonia Nitrogen, Orto-Phosphates and alkalinity, as well as microbiological analysis (coliforms). It was noted that the effluent in the unit in question does not receive treatment for their disposal, identified physical, chemical and microbiological characteristics of raw sewage. It is necessary therefore, investment in periodic reviews thus to carry out an appropriate treatment to effluent aiming to reduce environmental risks and public health. After the analysis results, it was proposed, in addition to preliminary treatment, a biological treatment for the effluent, type, primary facultative pond followed by two ponds maturation, in which the treatment efficiency in the analyzed parameters falls within the standards set by CONAMA 430/2011 in which the effluent post-treaty could be reused for less noble purposes, intended to clean water for activities that require a better quality<strong>.</strong></p>


2021 ◽  
Vol 108 (March) ◽  
pp. 1-5
Author(s):  
Kanchana N ◽  
◽  
Veeranan Arun Giridhari V ◽  
Vijayalakshmi R ◽  
◽  
...  

The present study aimed to developwhey-based herbal beverages and to evalautetheir physical, chemical, and sensory properties. The pH, titrable acidity (% lactic acid) and total soluble solids (⁰Brix) of whey used for the development of whey based herbal drinks were found to be 5.21, 0.23 and 6.4 respectively. The proximate composition of whey such as lactose (g/100g), protein (g/100g) and fat (g/100g) were 4.28, 0.28 and 0.13, respectively. The whey (65%), sugar (11%), H1 - brahmi extract (3%), H2 - mint extract (2%) and H3 - jaljeera powder (0.15%) were standardized for the formulation of whey-based herbal drinks. Among the three variations, whey-based jaljeera drink (H3) scored the highest sensory acceptability. The pH, titrable acidity (% citric acid), total soluble solids (⁰Brix), lactose (g/100g), protein (g/100g), fat (g/100g), total reducing sugar (g/100g), total sugar (g/100g), calcium (mg/100g), ascorbic acid (mg/100g) and total phenol (mgGAE/100g) of whey-jaljeera drink (H3) were 5.24, 0.21, 12.0, 2.78, 0.46, 0.30, 3.43, 14.43, 55.27, 0.12 and 14.26, respectively. The sensory attributes retention was high in glass (P2) compared to PET (P1). The sensory attributes were gradually decreased during the storage of room temperature (R1) than refrigerated temperature (R2). The cost of the formulated whey brahmi drink, whey mint drink, and whey jaljeera drinks were Rs.18.33/250ml, Rs.20.20/250ml and Rs.14.75/250ml, respectively. The study concluded that nutritionally rich whey-based herbal drinks can be recommended to all group of people.


2021 ◽  
Author(s):  
Yahya Absalan ◽  
Nazanin Noroozi Shad ◽  
Mostafa Gholizadeh

Abstract Different types of the amino acids (Glutamine, Glycine, Alanine) were used to coordinate TiCl3 in order to investigating the best precursor for synthesis of TiO2. Also, a full investigation was carried out to synthesis four different structures of TiO2 nanoparticles [TiO2 (A0.8R0.2), TiO2 (A0.6R0.4), TiO2 (Anatase), and TiO2 (Rutile)]. Oxidation of derivatives alcohol to their corresponding aldehyde through the obtained nanoparticles, as a photocatalyst, under UV light was considered to investigate the best structure of TiO2. Different physical-chemical analyses were applied to investigate the result. The result showed that the titanium dioxide nanoparticle, synthesized from glycine was obtained at the least temperature and was chosen as a precursor to synthesis of four different types of TiO2. All the synthesized TiO2 were applied for oxidation of benzyl alcohols into benzaldehyde, as a test, and TiO2 (A0.6R0.4) could give the best result (87% efficiency). Then it was used to oxidize benzyl alcohol, 4-cholorobenzyl alcohol, 4-nitrobenzyl alcohol and 4-methoxybenzyl alcohol to their corresponding aldehyde and efficiency were 74, 92, 87, and 65% respectively.


2017 ◽  
Vol 8 (4) ◽  
pp. 128
Author(s):  
Anelise Christ Ribeiro ◽  
Rui Carlos Zambiazi ◽  
Leonor Almeida de Souza Soares

The objective of this study was to evaluate the influence of protein globulin-based films and with addition of phenolic compounds extracted from Spirulina sp. LEB-18 in the conservation of tomatoes "Sweet Grape". For this, the tomatoes were immersed for one min in edible coatings, the first based on phenolic extracts derived from Spirulina sp. LEB-18 and ovalbumin (extracted from eggwhite), and the second based just on ovalbumin, beyond the control sample with only water immersion. Tests of pH, of titratable acidity, of color, of soluble solids, of mass loss and visual analysis were taken every 96 h during the 20 day period. The results show that the coating made with phenolic compounds increased the shelf life of tomatoes type "sweet grape".


2021 ◽  
Vol 2 (4) ◽  
pp. 5877-5892
Author(s):  
Guadalupe Ingrid Da Costa ◽  
Verônica Soares de Paula Morais ◽  
Mariana Borges de Lima Dutra ◽  
Scarlet Coelho Araujo

Changes in eating habits of the individuals have led the food industry to develop products that meet this demand. Banana is a fruit very appreciated in Brazil, but with a high loss rate, due to the absence of instruction among the manipulators. The production of banana flour can reduce these losses, because flour is made with the green fruit, which contains unique compounds with functional properties. Cassava starch cookies is a typical Brazilian food, characterized by its large volume and low weight, thus, the addition of green banana flour to these cookies may be a viable alternative. The objective of this study was to produce cassava starch cookies with substitution of the farinaceous fraction for green banana flour, to evaluate the proximate composition, and to verify the effect of the storage time on the physicochemical, sensory, and microbiological characteristics of the products. Four formulations were made, as follows: a control formulation (A1), and three different formulations containing 4% banana flour (A2), 8% banana flour (A3), and 12% banana flour (A4). The cookies were evaluated for proximate composition and the physicochemical, sensory, and microbiological characteristics in two different periods, corresponding to T1 immediately after manufacture, and T2 after 60 days of storage. All results were analyzed by Tukey's test and ANOVA at 5% probability. Significant differences (p≤0.05) were observed for moisture and protein contents of the products. Regarding the physicochemical parameters, the samples presented significant differences (p≤0.05) for texture, color, and moisture gain, after 60 days of storage. The microbiological quality remained within the limits permitted by the current legislation, demonstrating excellent hygienic-sanitary conditions. Concerning the sensory evaluation, the samples A1 and A2 presented the higher acceptance scores, with no significant differences for the attribute crispness. Therefore, the addition of 4% green banana flour in cassava starch cookies may be a promising alternative of product diversification to attend the consumer demands, once the final product presented few changes in structure and good sensory acceptance.   Los cambios en los hábitos alimentarios de los individuos han llevado a la industria alimentaria a desarrollar productos que satisfagan esta demanda. El plátano es una fruta muy apreciada en Brasil, pero con un alto índice de pérdidas, debido a la falta de instrucción de los manipuladores. La producción de harina de plátano puede reducir estas pérdidas, porque la harina se hace con la fruta verde, que contiene compuestos únicos con propiedades funcionales. Las galletas de almidón de yuca son un alimento típico brasileño, caracterizado por su gran volumen y bajo peso, por lo que la adición de harina de plátano verde a estas galletas puede ser una alternativa viable. El objetivo de este estudio fue producir galletas de almidón de yuca con sustitución de la fracción farinácea por harina de plátano verde, evaluar la composición proximal y verificar el efecto del tiempo de almacenamiento en las características fisicoquímicas, sensoriales y microbiológicas de los productos. Se elaboraron cuatro formulaciones, a saber: una formulación de control (A1), y tres formulaciones diferentes que contenían 4% de harina de plátano (A2), 8% de harina de plátano (A3) y 12% de harina de plátano (A4). Se evaluó la composición proximal de las galletas y las características fisicoquímicas, sensoriales y microbiológicas en dos períodos diferentes, correspondientes a T1 inmediatamente después de la fabricación, y T2 después de 60 días de almacenamiento. Todos los resultados se analizaron mediante la prueba de Tukey y ANOVA al 5% de probabilidad. Se observaron diferencias significativas (p≤0,05) para los contenidos de humedad y proteínas de los productos. En cuanto a los parámetros fisicoquímicos, las muestras presentaron diferencias significativas (p≤0,05) para la textura, el color y la ganancia de humedad, tras 60 días de almacenamiento. La calidad microbiológica se mantuvo dentro de los límites permitidos por la legislación vigente, demostrando unas excelentes condiciones higiénico-sanitarias. En cuanto a la evaluación sensorial, las muestras A1 y A2 presentaron las mayores puntuaciones de aceptación, sin diferencias significativas para el atributo crujiente. Por lo tanto, la adición de 4% de harina de plátano verde en las galletas de almidón de yuca puede ser una alternativa prometedora de diversificación de productos para atender las demandas de los consumidores, una vez que el producto final presentó pocos cambios en la estructura y buena aceptación sensorial.


1987 ◽  
Vol 50 (11) ◽  
pp. 948-951 ◽  
Author(s):  
DONNA S. BENTLEY ◽  
JAMES O. REAGAN ◽  
NELSON A. COX ◽  
J. STAN BAILEY

Whole-hog sausage was prepared from hot- and cold-boned pork raw materials to determine the effects of meat type, storage temperature and length of storage on various processing and bacteriological characteristics. Samples were stored at −1 and 4°C for 0, 28 and 56 d. Various physical, chemical and microbiological properties of the sausage were evaluated. Thiobarbituric acid (TBA) values were not affected by meat type (pre or postrigor). Hunter-Color values varied significantly among the meat types and storage temperatures. Total bacterial counts varied significantly among the hot- and cold-boned pork sausage samples (day 0). Cold-boned sausage stored at −1°C had lower plate counts of the various treatments for days 28 and 56. Pseudomonas was the predominant organism found in hotand cold-boned sausage samples. Hot-boned sausage exhibited a more diverse bacterial population than did cold-boned sausage. More gram-positive organisms were found in hot-boned sausage samples. Cold-boned sausage had a lower total bacterial count at day 0 and maintained lower counts and therefore a longer shelf life throughout the study when held at −1°C.


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