Pradeep Puligundla

Gachon University | kyungwon

Background: Different pathogenic microorganisms have been reported to cause sprouts-associated outbreaks. In order to sterilize and enhance the germination of seeds, non-thermal plasma has been increasingly investigated in the field of agricultural science as an alternative to the traditional pre-sowing seed treatments. This work aimed to evaluate...

Cognitive decline and constipation are common complications in the elderly. Probiotics are potential therapeutic agents to ameliorate cognitive impairment through gut-brain axis. Several clinical studies have investigated the beneficial effects of probiotics on cognitive impairment and constipation in elderly. However, a quantitative meta-analysis...

Flaxseed contains significant concentration of mucilage or gum (a type of hydrocolloid). Flaxseed mucilage (FM) predominantly occurs in the outermost layer of the seed’s hull and is known to possess numerous health benefits such as delayed gastric emptying, reduced serum cholesterol, and improved glycemic control. FM is typically composed of an ara...

Shiga-toxin-producing Escherichia coli O157:H7 is a well-known water- and food-borne zoonotic pathogen that can cause gastroenteritis in humans. It threatens the health of millions of people each year; several outbreaks of E. coli O157:H7 infections have been linked to the consumption of contaminated plant foods (e.g., lettuce, spinach, tomato, and...

In recent years, buckwheat noodles have gained increased importance because of their functional properties. These qualities are attributed to the abundance of bioactive compounds (e.g., rutin, quercetin) and nutraceuticals (e.g., B vitamins, unsaturated fatty acids). Buckwheat noodle consumption has been shown to be associated with improved metabol...

Sugar beet pulp (SBP) is a valuable by-product of the sugar beet industry and is predominantly composed of cellulose, hemicellulose, and pectin. It is commonly used as livestock feed because of its palatability, good energy levels, and highly digestible fibers such as pectins and glucans. However, the utilization of SBP for the production of value-...

Customer demand for product diversity is the key driving force for innovations in the brewing industry. Specialty beers are regarded as a distinct group of beers different from two major types, lagers and ales, without established definitions or boundaries. Specialty beers, including low- to no-alcohol beer, low carbohydrate beer, gluten-free beer,...

In livestock nutrition, natural feed additives are gaining increased attention as alternatives to antibiotic growth promoters to improve animal performance. This study investigated the effects of dietary turmeric supplementation on the growth performance and gut health of weaned piglets. A total of 48 weaned piglets (Duroc × [Landrace × Yorkshire])...

Brewers' spent grain (BSG) is the most abundant by-product of beer-brewing. BSG is rich in nutrients such as protein, fiber, minerals, and vitamins, and therefore it is conventionally used as low-cost animal feed. On the other hand, alternative utilization of BSG has gained increased attention during recent years due to technological progress in it...

To improve the microbiological quality of chokeberries, corona discharge plasma jet (CDPJ) was employed as a decontaminating agent. The mean levels of aerobic bacteria and yeast and molds contaminants in chokeberries were 4.78 and 4.87 log CFU/g, respectively; the viable counts were decreased by 2.09 and 1.83 log units following CDPJ treatment for...

Germinated brown rice is nutritionally superior to its ungerminated counterpart. However, germination may allow multiplication of grain-associated contaminants. Therefore, in the present study, the suitability of corona discharge plasma jet (CDPJ) as a disinfectant prior to germination was tested. CDPJ was generated under atmospheric pressure condi...

This study was aimed to reduce the concentrations of benzopyrene (BaP) and acrylamide (ACR) in roasted coffee beans by corona discharge plasma jet (CDPJ). The initial concentrations of BaP and ACR in the beans were decreased by 53.6% and 32.0%, respectively, following CDPJ (20 kV DC/1.5 A) treatment for 60 min. The levels of total solid, total acid...

Beer-brewing under high gravity (HG, specific gravity of 13–18 °P) and very high gravity (VHG, specific gravity of >18 °P) wort conditions has a wide range of benefits, from improved process economics to reduced environmental impact. This review highlights the research developments in HG and VHG brewing over the last 10 years. It emphasizes the imp...

Spent brewer's yeast (SBY) is one of major by-products produced during beer brewing process. SBY is an abundant source of protein, minerals, vitamins, especially B-complex, as well as nutraceuticals such as β-glucans or mono- and oligosaccharides. Due to the presence of nutrients, abundant availability and low cost, SBY has been widely used in anim...

In this study, we compared the bactericidal activities of corona discharge plasma jet (CDPJ) at different relative humidities (RHs) on Escherichia coli O157:H7, Salmonella typhimurium and Staphylococcus aureus. CDPJs were produced at 41–62% RH range. The levels of CO, NO and NO2 species were increased with increasing RH from 41 to 51%: from 270 to...

Synthetic surfactants are used in a wide range of products ranging from household cleaning detergents to pesticide formulations. Due to their widespread use, residual surfactants are often released in large quantities into the environment, especially via wastewater and can act as potential toxicants. The present study explored the applicability of...

Aflatoxins are a class of mycotoxins produced predominantly by fungal species such as Aspergillus flavus, Aspergillus parasiticus and Aspergillus nomius. These fungi and their toxins are usually found in a variety of agricultural products. Some mycotoxins are highly toxic, mutagenic, teratogenic and carcinogenic to humans and animals. Due to their...

This study was conducted in two stages to investigate the potential of multi-enzyme supplementation on the nutrient digestibility, growth performance, and gut microbial composition of pigs. In stage 1, effects of multi-enzyme complex (xylanase, α-amylase, β-glucanase, and protease) supplementation on the ileal and total tract dry matter (DM) digest...

The afterglow of an atmospheric pressure plasma can conveniently be used for large scale decontamination operations. In the present study, an afterglow dielectric-barrier discharge air plasma (ADDAP) was used to inactivate Escherichia coli O157:H7, which was used as a model microorganism for studying the inactivation effect of the plasma. ADDAP was...

Benzo[a]pyrene (BaP), a carcinogenic polycyclic aromatic hydrocarbon, is ubiquitous in nature, including smoked and grilled meats. BaP degradation has attracted attention due to its recalcitrant chemical nature. In this study, low-pressure cold plasma (LPCP) was used to degrade BaP on glass slides and in food materials. LPCP discharges were generat...

The application of non-thermal plasmas, as a substitute to chemical pre-germination treatments, for seed disinfection is increasingly becoming common in recent years. In this study, the potentiality of corona discharge plasma jet (CDPJ) for microbial inactivation in pak choi sprout seeds was evaluated, including the CDPJ exposure effects on the see...

Bacterial and fungal spore contamination in different industries has a greater economic impact. Because of the remarkable resistance of spores to most physical and chemical microbicidal agents, their inactivation need special attention during sterilization processes. Heat and chemical sporicides are not always well suited for different sterilizatio...

The decontamination of spoilage-related microbes in low-alcohol red wine was performed using a serial multiple electrode pulsed electric field (PEF) treatment system. The system consisted of seven electrodes connected in series, and it has been designed to produce square-wave high-voltage pulses of 1 μs duration at various electric field strengths...

Acidic electrolyzed water (AEW) was used for collards sanitization. In the AEW (pH of 3.6; 230 mg/L chlorine) generator, the rates of brine inflow and catholyte outflow were 2.73 and 442 mL/min, respectively. Following treatment of the collards with the AEW alone (5 min), the counts of aerobic bacterial contaminants were reduced by 1.91 log CFU/g,...

Germinated brown rice (GBR) flours were prepared by hammer milling and jet milling. The effect of the milling on the physicochemical and pasting properties of the resultant flours were investigated. The jet milling of GBR resulted in flour with different particle sizes, which were air-classified into coarse and fine size fractions. As the particle...

The technology of ethanol fermentation under high gravity (HG) and very high gravity (VHG) conditions has witnessed significant progress over the last three decades owing to economic and environmental benefits. Research efforts have been directed toward comprehensive development of the technology. As a result, final ethanol concentrations in excess...

The effect of intermittent corona discharge plasma jet (ICDPJ) treatment in improving the microbiological quality and shelf life of kumquat fruits was evaluated. Kumquats were treated by ICDPJ generated using high-voltage power generator, with an output voltage of 8 kV DC and at current levels of 2.0–4.0 A. Aerobic bacteria and yeasts and molds wer...

The effectiveness of intermittent corona discharge plasma jet (ICDPJ) treatment over continuous mode for the decontamination of cherry tomatoes was evaluated. Microbial contaminants, namely aerobic bacteria, yeasts and molds and coliform bacteria, were detected in tomatoes in the range of 2.49-3.05 log CFU/g. Tomatoes were treated with corona plasm...

A two-factor, six-level factorial design was adopted for optimizing the flow rates of brine and catholyte in electrolyzed water generator in order to produce electrolyzed water (EW) having best decontamination performance for broccoli sprout washing. EW, especially acidic electrolyzed water (AEW), having a pH of 3.66 and chlorine content of 230 mg...

The use of corona discharge plasma jet (CDPJ) for the improvement of hygienic quality of Gwamegi was investigated. Microbial contaminants, namely aerobic, marine bacteria, coliforms, Staphylococcus aureus and molds and yeasts, were detected in Gwamegi samples. The CDPJ generated using 20 kV DC voltage and at 58 kHz frequency was used for the decont...

Tea polyphenols find a wide range of applications in food, medical and pharmaceutical fields owing to their multi-health benefits including antioxidant and antibacterial activities, cancer prevention, anti-radiation and immune enhancement. However, the low absorption rate of tea polyphenols impedes their bioactivity in vivo. The low absorption and...

The use of corona discharge plasma jet (CDPJ) for the improvement of the sanitary quality of semi-dried squid was investigated. Microbial contaminants, namely aerobic, coliforms, and molds and yeasts, were detected in the samples. The CDPJ generated using 20 kV DC voltage at 58 kHz frequency was used for the decontamination treatment (1–10 min). Th...

Green tea contains numerous bioactive compounds that may provide multiple health benefits, including antioxidative, anti-inflammatory, anti-carcinogenic, anti-proliferative, anti-hypertensive, antithrombogenic and lipid-lowering effects. Most of the chemopreventive and therapeutic effects of green tea extracts have been attributed to the presence o...

Sprout-related foodborne disease outbreaks are increasingly becoming a concern for food safety. The primary sources of microbial contamination in ready-to-eat sprouts are contaminated seeds, which are improperly disinfected prior to sprouting. In recent years, the application of nonthermal plasmas for seed decontamination is increasingly being inve...

The potentiality of corona discharge plasma jet (CDPJ) for disinfection of food packaging materials, including glass, polyethylene, polypropylene, nylon and paper foil, was evaluated. CDPJ was generated using a high voltage (20 kV) pulsed DC power source, at 1.5 A current and 58 kHz frequency. The separation distance between plasma electrode and sa...

β-Glucan, the representative dietary fibre component of barley, has received much attention, primarily due to its nutritional significance. In this study, β-glucans prepared from barley pearling byproducts were characterized with respect to their molecular weight, solubility and viscosity. Following the initial alkaline extraction, the crude β-gluc...

Low-dose gamma irradiation has been considered effective for improving the microbiological safety of fresh and processed foods. In the present study, γ-rays in the dose-range of 0-15 kGy were used for microbial decontamination of commercially available, ready-to-use powdered cocoa beverage premix. Premix was artificially inoculated with Aspergillus...

Antioxidant edible films based on chitosan hydrochloride (CHC) and epigallocatechin gallate (EGCG)-loaded nanocapsules (NCs) were developed. The CHC films incorporated with NCs were prepared by a casting method in three different proportions. The obtained films were characterized using the techniques including scanning electron microscopy, Fourier...

The objective of this study was to prepare chitosan nanoparticles (CS NPs) coated with zein as a promising encapsulation and delivery system for epigallocatechin gallate (EGCG). The factors influencing the nanoparticle fabrication, including zein concentration, zein/chitosan weight ratio and EGCG encapsulation percentage, were systematically invest...

Biofilms as complex microbial communities attached to surfaces are posing several challenges in different sectors, ranging from food and healthcare to desalination and power generation. Biofilms survive in hostile environments due to a distinct physiology and behavior in comparison to their planktonic counterparts. They are ubiquitous, resilient, a...

http://db.koreascholar.com/article.aspx?code=322080

Non-chemical disinfection methods are gaining popularity in egg sanitation. In this study, afterglow corona discharge air plasma (ACDAP) was used for microbial decontamination of shell eggs. ACDAP was generated at an output voltage level of 20 kV DC and at a frequency of 58 kHz. Microbial contaminants including aerobic bacteria molds and yeasts and...

Non-thermal techniques for microbial decontamination in foods are becoming more promising. This work aims to evaluate the suitability and effectiveness of corona discharge plasma jet (CDPJ) for the inactivation of microbial contaminants of dried squid shreds. CDPJ was generated using 20 kV pulsed DC voltage and at 58 kHz frequency. Upon the CDPJ tr...

The usefulness of dielectric barrier discharge (DBD) plasma for surface disinfection of the common food packaging materials, namely glass, polyethylene, polypropylene, nylon, and paper foil was evaluated. DBD plasma was generated by applying a pulsed DC voltage of 10 kV and at a power of 208 W. The separation distance between the electrodes was 2.6...

Sprout-related outbreaks of foodborne illnesses are increasingly becoming a food safety concern. Different pathogenic microorganisms that originate from sprout seeds are known to play a crucial role in the pathogenesis of such outbreaks. Therefore, in order to decontaminate and also to enhance the germination of seeds, the applications of non-therm...

Despite several successful disinfection strategies, process of controlling the environmental survival and transmission of human pathogenic viruses is becoming increasingly more difficult because of their emerging resistance to disinfectants. Therefore, range of non-chemical methods of inactivation is being explored extensively as an alternative. Es...

Nonthermal techniques for microbial decontamination are becoming more common for ensuring food safety. In this study, a corona discharge plasma jet (CDPJ) was used for inactivation of microbial contaminants of dried Alaska pollock shreds. Corona plasma jet was generated at a current strength of 1.5 A, and a span length of 25 mm was maintained betwe...

As a part of a safety assessment of new transgenic crops, compositional equivalence studies between transgenic crops with non-transgenic comparators are almost universally required. This study was conducted to compare nutritional profiles of proximate composition, and fatty acid, amino acid, mineral, and vitamin contents, and anti-nutrients, betwee...

Lignocellulosic biomass conversion to biofuels such as ethanol and other value-added bio-products including activated carbons has attracted much attention. The development of an efficient, cost-effective, and eco-friendly pretreatment process is a major challenge in lignocellulosic biomass to biofuel conversion. Although several modern pretreatment...

In the present study, native and chemically modified (acetylated and hydroxypropylated) rice starches were partly substituted for butter in the production of reduced-fat muffins and for shortening in cookies. Physicochemical characteristics of native and modified rice starches were investigated. All the three types of starches were substituted at 2...

Corona discharge plasma jet (CDPJ) was used for inactivation of Escherichia coli O157:H7 and Listeria monocytogenes inoculated experimentally onto the surfaces of fresh and frozen pork. CDPJ was generated with an output voltage of 20 kV direct current and a frequency of 58 kHz. Optimal inactivation was found with plasma created at a current of 1.5...

In the present study, atmospheric pressure corona discharge plasma jet (CDPJ) was used for surface microbial decontamination of thin sheets of dried laver, which is commonly used in ready-to-eat Korean rice roll, gimbap (kimbab). Microbial contaminants namely aerobic bacteria, molds, and marine bacteria were found on the surface of commercial dried...

Dielectric barrier discharge (DBD) plasma in atmospheric pressure air was used for microbial decontamination of thin sheets of dried laver, which are commonly used in kimbab preparation. Microbial contaminants namely aerobic bacteria, moulds and marine bacteria were found in sun-dried laver sheets. DBD plasma was generated at an output voltage of 3...

As consumption of high-fat, high-calorie diets is directly linked to obesity and related health risks, low-fat or reduced-fat food production has received greater attention in recent years. In the present study, we determined the characteristics of reduced-fat mayonnaises that were formulated by partial substitution of oil using native and modified...

In the present study, low-pressure glow discharge plasma was used for surface decontamination of the common food packaging materials, namely glass, polyethylene, polypropylene, nylon, and paper foil. Low-pressure air plasma was generated over a vacuum pressure range of 0.5-5.0 Torr, and at a power density range of 12.4-54.1 mW/cm3. Compared to plas...

Low-pressure air plasma (LPAP) has not been widely used for food products surface bio-decontamination. In the present study, LPAP was used as inactivating agent against surface microbial contaminants of sun-dried laver sheets. Microbial inactivation kinetics and physicochemical characteristics of LPAP-exposed laver sheets were determined. Also, the...

Atmospheric pressure cold plasma technology is becoming increasingly popular for microbiological decontamination of food and bio-materials. In the present study, afterglow corona discharge air plasma (ACDAP) was used for inactivation of most common food-borne pathogens, namely pathogenic Escherichia coli, Staphylococcus aureus, Salmonella typhimuri...

Intelligent packaging technologies are rapidly gaining interest in the agriculture and food industries. Intelligent packaging for agricultural and food products has great potential to improve the shelf life and safety of agricultural and food products apart from its basic functions of keeping the products clean and protecting against unwanted physi...

In recent years, by-products of fruit processing have received a great deal of attention, which is primarily due to their nutritional and economic exploitation through utilization of emerging technologies. Mango peel waste, a by-product from pulp processing units, is an important source of high quality antioxidant dietary fibre, pectin, polyphenols...

Selenium (Se) has been recognized as an essential nutrient for humans. Plant foods are the predominant source of selenium and majority of dietary selenium is absorbed depending on the type of food consumed. Nowadays, green tea is becoming increasingly popular for its prominent health benefits, including the ability to supplement selenium in organic...

Fuel ethanol was produced from very high gravity (VHG) cassava mashes (30-40% w/v dry matter content) using flocculating yeast Saccharomyces bayanus. The total reducing sugars (TRS) concentrations of 30%, 35% and 40% mashes after starch liquefaction and saccharification were 29.0%, 31.64% and 37.15% (w/v), respectively. After 72 h fermentation, fin...

The objectives of this study are to develop a chitosan-based CO2 indicator that can notify the onset of ripening stage of packaged kimchi, and to study the correlation between the ripening stages of kimchi and the transparency levels of the chitosan-based CO2 indicator during storage. The chitosan-based CO2 indicators were developed by adding chito...

Food contact packaging material should be stable and non-reactive with the food that it is in contact with, and must promote the safety of food. However, for a number of years, there has been evidence that indefinitely small amounts of chemicals could migrate or leach from food packaging materials into the foods they hold. The chemistry and toxicit...

In recent years, microwave heating has been increasingly popular all over the world, in particular for modern household food-processing applications, due to increased economic merits in many developing countries such as steady economic growth, high disposable income, etc. This trend also seems to be associated with increased awareness about the ben...

A chitosan-based carbon dioxide (CO(2)) indicator was developed to monitor freshness or quality of packaged foods during their storage, as elevated CO(2) levels inside a package is one of the prime indicators of microbial spoilage of food. The objective of this proof-of-concept study, therefore, was to develop a chitosan-based CO(2) indicator and t...

https://iafp.confex.com/iafp/2012/webprogram/Paper2009.html

The Box-Wilson central composite design (CCD) based on response surface methodology (RSM) was used for ethanol fermentation using very high gravity (VHG) finger millet hydrolysate. Optimized process variables were namely, concentrations of yeast extract, magnesium sulphate and pH of the medium. High gravity mashes (>300 g dissolved solids per liter...

In recent years, issues regading safety and wellness of dietary oils and fats have received major attention. This is particularly so in the case of structured modified fats, which are being used extensively to meet the product-specific demand primarily in bakery industry as shortenings, cocoa butter substitutes in confectionary industry, and in mar...

Recently, the demand for safe and high quality foods, as well as changes in consumer preferences have led to the development of innovative and novel approaches in food packaging technology. One such development is the smart or intelligent food packaging technology. Intelligent packaging has enabled to monitor and communicate information about food...

The main objective of this study was to evaluate the effect of yeast immobilization on ethanolic fermentation of very high gravity (VHG) medium and to determine the concentrations of yeast storage carbohydrates like trehalose and glycogen during the process. Repeated batch ethanolic fermentation of VHG medium was carried out using Saccharomyces cer...

There have been numerous developments in ethanol fermentation technology since the beginning of the new millennium as ethanol has become an immediate viable alternative to fast-depleting crude reserves as well as increasing concerns over environmental pollution. Nowadays, although most research efforts are focused on the conversion of cheap cellulo...

P08-020 http://www.kosfost.or.kr/file/2011KoSFoST_abstract.pdf

P13-009 http://www.kosfost.or.kr/file/2011KoSFoST_abstract.pdf

P3-21 IAFP Annual Meeting 2011. http://orbit.dtu.dk/files/5754545/poster-abstracts-2011-2.pdf

Fermentation efficiency of more than 85% was obtained by high gravity fermentation of 33-34°Bx (spec. gravity ≈1.134) molasses medium with certain nutrients, instead of generally employed medium containing ≈16% (w/v) total sugar (spec. gravity ≈1.090) for ethanol fermentation in distilleries to get maximum 80-85% conversion. The fermenting yeast, S...

Very high gravity (VHG) media with finger millet (ragi) flour were prepared and fermented with ethanol tolerant yeast, Saccharomyces bayanus. Maximum ethanol concentration of 15.6% (v/v) was obtained in the nutrients supplemented medium. About 86.6% fermentation efficiency was obtained. The supplementation of peptone and yeast extract led to increa...

http://shodhganga.inflibnet.ac.in/handle/10603/107349

A new thermotolerant UV- mutant strain Saccharomyces cerevisiae UV4 based on its invertase activity was selected and found to possess higher temperature (40°C) tolerance, higher growth rate and fermenting ability than the parent strain Saccharomyces cerevisiae 101. At 40°C, the final ethanol concentration was increased by more than 45% by the mutan...

Production of high ethanol concentration by using very high gravity fermentation technology eliminates the expensive steps in the conventional ethanol fermentation process and saves time. In the present study, a final ethanol concentration was enhanced to 15% (v/v) within 48 h by adding malted cow pea (Vigna unguiculata L) flour (2-4% w/v) to a sim...