Search results for "paste"

High-performance liquid chromatographic determination of furfural compounds in infant formulas

2002

Furfural contents in adapted and follow-up infant formulas were measured by RP-HPLC. The evolution of furfural compound contents during storage (a year at 20 and 37 °C) was studied. 2-Furylmethylketone and 5-methyl-2-furaldehyde were not detectable in analysed samples. The differences in the furfural compounds at point zero between both infant formulas has to be ascribed to the differences in protein and iron contents. An increase in free 5-hydroxymethyl-2-furfuraldehyde (HMF), 2-furaldehyde (F) and HMF+F contents was observed in all samples, although the differences were not statistically significant. The storage temperature affected the total HMF content and the storage time affected the …

Effect of storage period under variable conditions on the chemical and physical composition and colour of Spanish refrigerated orange juices

2005

The effects of the physicochemical and quality characteristics of various minimally pasteurized refrigerated orange Spanish juices and their changes with storage time and temperature were investigated. Essential oils, acidity, conductivity, diacetyl index, hydroxymethylfurfural, formol index, viscosity and ascorbic acid varied with storage time more significantly at 10 degrees C than at 4 degrees C. Density, colour and pectinmethylesterase did not vary at 4 degrees C. Some of the parameters could be used as indicators of quality loss or spoilage of the juices. The degradation kinetics of the concentration of remaining ascorbic acid against time follows a straight line whose slope indicates …

Green food processing: concepts, strategies, and tools

2019

Abstract One of the developmental aspects of food science is testing and adapting advanced technologies for food production, which save resources and improve food quality. More often than not, this includes technologies operating at lower temperatures, shorter time, and resulting in better preservation of the thermolabile compounds in the foods, as compared to conventional technologies. Nutritionally rich but thermally sensitive raw materials such as fruit, vegetables, meats, and others can particularly benefit from the application of such advanced food technologies. Technologies with the most tested potential for industrial implementation include nonthermal plasma, pulsed electric field, h…

Refrigerated Fruit Juices: Quality and Safety Issues

2007

Fruit juices are an important source of bioactive compounds, but techniques used for their processing and subsequent storage may cause alterations in their contents so they do not provide the benefits expected by the consumer. In recent years consumers have increasingly sought so-called "fresh" products (like fresh products), stored in refrigeration. This has led the food industry to develop alternative processing technologies to produce foods with a minimum of nutritional, physicochemical, or organoleptic changes induced by the technologies themselves. Attention has also focused on evaluating the microbiological or toxicological risks that may be involved in applying these processes, and t…

Controller temperature grinding under atmosphere for Almond (Prunus Dulcis) Paste production

2010

Adsorption and Detection of DNA Dendrimers at Carbon Electrodes

1998

Made available in DSpace on 2022-04-28T19:53:27Z (GMT). No. of bitstreams: 0 Previous issue date: 1998-01-01 Dendritic nucleic acids are highly branched and ordered molecular structures, possessing numerous single-stranded oligonucleotide arms, which hold great promise for enhancing the sensitivity of DNA biosensors. This article evaluates the interfacial behavior and redox activity of nucleic acid dendrimers at carbon paste electrodes, in comparison to DNA. Factors influencing the adsorption behavior, including the adsorption potential and time, solution conditions, or dendrimer concentration, are explored. The strong adsorption at the anodically pretreated carbon surface is exploited for …

Simultaneous homogeneous immunoassay of phenytoin and phenobarbital using a Nafion-loaded carbon paste electrode and two redox cationic labels

1997

Abstract The dual-analyte homogeneous immunoassay of two antiepileptic drugs was carried out simultaneously at physiological pH by square-wave voltammetry at a Nafion-loaded carbon paste electrode. Phenobarbital (PB) and phenytoin (DPH) were labeled by a cobaltocenium salt (Cc+) and a ferroceneammonium salt (N+Fc), respectively, and the corresponding standard redox potentials were −1.05 V and 0.26 V. Detection limits of 0.25 and 0.2 μM were achieved for PB-Cc+ and DPH-N+Fc (S/N = 3) after a 5-minute accumulation step, with linear responses over the 0.25–5 and 0.2–5 μM ranges, respectively. The relative standard deviation was evaluated to be ≥ 11% for 1 μM of each labeled drug. The separate,…

Posługa Kościoła wobec młodzieży na przykładzie diecezji opolskiej

2019

Synod Biskupów dotyczący duszpasterstwa młodzieży, który odbył się w 2018 roku, zauważa, iż posługa pastoralna prowadzona wśród ludzi młodych powinna odbywać się przede wszystkim na poziomie parafii w ramach duszpasterstwa zwyczajnego. Jednak działalność zbawcza Kościoła wśród młodzieży wymaga także obecności elementów duszpasterstwa nadzwyczajnego, co ma dokonywać się poprzez odpowiednie przygotowanie samego duszpasterza i pomagających mu animatorów. Takie działanie może przyczynić się do efektywności prowadzonych działań pastoralnych. Niewątpliwie konieczne wydają się również: wizja, strategia prowadzenia duszpasterstwa na szczeblu diecezji, dekanatu i parafii, a także znajomość kondycji …

STUDY ON THE TUNNEL PASTEURIZER ON TABLE OLIVES PROCESSING

2015

The application of heat treatment is particularly important in maintaining the organoleptic characteristics of fermented agro-food products, which potential consumers perceive as reflecting the quality of these foodstuffs. However, heat treatments can be cause of deterioration of many quality parameters of agro-food products, including texture, intended as the consistency of the pulp. In this study 'Nocellara del Belice' table olives produced in 2010 and packaged in glass jars were subjected to pasteurization at industrial scale using a tunnel pasteurizer with a core temperature of 75°C for 8 min. The aim of the study was to mechanically evaluate the pulp texture evolution that contributes …

The expression of virulence during double infections by different parasites with conflicting host exploitation and transmission strategies

2011

In many natural populations, hosts are found to be infected by more than one parasite species. When these parasites have different host exploitation strategies and transmission modes, a conflict among them may arise. Such a conflict may reduce the success of both parasites, but could work to the benefit of the host. For example, the less-virulent parasite may protect the host against the more-virulent competitor. We examine this conflict using the waterflea Daphnia magna and two of its sympatric parasites: the blood-infecting bacterium Pasteuria ramosa that transmits horizontally and the intracellular microsporidium Octosporea bayeri that can concurrently transmit horizontally and verticall…