Extended Storage Time Research Articles

The effect of cold plasma treatment on the fruit quality and aroma components of winter jujubes (Ziziphus jujuba Mill. 'Dongzao').

Cold plasma (CP) is a novel environmental-friendly preservation technology that causes minimal damage to fruits. The flavor and quality of winter jujubes have decreased with the extended storage time. Currently, the research on the use of CP on winter jujubes (Ziziphus jujuba Mill. 'Dongzao') mainly focuses on the effect of the treatment on storage quality. There is limited research on the effect of CP treatment on the flavor of winter jujubes. This study used different CP (80kV) treatment durations (0, 5, and 10min) to treat winter jujubes. The appropriate treatment time was selected by observing the changes in color, respiratory intensity, soluble sugar content, total acid content, and vitamin C (VC) content of winter jujubes. Amino acid analyzer and headspace solid-phase microextraction in combination with gas chromatography coupled with mass spectrometric detection were used to analyze the effect of CP treatment on the flavor compounds of winter jujubes. The results showed that the 5-min CP treatment could significantly slow down the red coloration of winter jujube while maintaining high soluble sugar, total acid, and VC content. At the respiration peak, the respiratory intensity of the 5-min CP treatment group was 0.74 mg CO2·kg-1·h-1 lower than that of the control group (p < 0.05). CP treatment slowed down the decrease in the content of amino acids and volatile organic compounds (such as 2-methyl-4-pentenal, 2-hexenal, and 3-hexenal) in winter jujubes. This study will provide basic data for applying CP preservation technology in postharvest winter jujubes.

Alterations in quality characteristics and bioactive compounds of blackberry fruits subjected to postharvest salicylic acid treatment during cold storage

AbstractBlackberry deteriorates rapidly after harvest due to its sensitive structure, limiting their storage time to about a week and resulting in significant economic losses. The study was conducted to determine the effects of salicylic acid applications on postharvest fruit quality in blackberries, the harvested fruit was immersed in salicylic acid solutions prepared at concentrations of 0.5, 1, and 1.5 mM for 15 min. Measurements and analyses such as weight loss, decay rate, soluble solids contents (SSC), pH, acidity, respiration rate, vitamin C, organic acids, and phenolic compounds were performed on fruits stored for 12 days with intervals of 4 days. Applying salicylic acid to fruits resulted in significantly less weight loss and decay rate. Salicylic acid application was effective in increasing SSC rate and decreasing titratable acidity with increasing storage time, and lower SSC and higher titratable acidity were measured with this application. Salicylic acid maintained organic acids and vitamin C postharvest. The decreases in individual phenolic compound levels occurred with extended storage time. Salicylic acid application generally was effective in maintaining concentrations of phenolic compounds during storage, and it was found to be effective on fruit quality, with effectiveness varying depending on application dosage. The study identified 1.5 mM as the most effective dosage of salicylic acid, which could be utilized to maintain postharvest quality and extend cold storage in blackberries.

Analysis of wheat fungal community succession in traditional storage structures using Illumina MiSeq sequencing technology

The diversity of fungi in wheat with different deoxynivalenol (DON) content at various periods post-harvest and in the environment of storage were investigated. The changes in DON content were measured with ultra-high-performance liquid chromatography–tandem mass spectrometry (UHPLC-MS/MS), and an amplicon sequence analysis of fungi was performed in traditional storage structures using high-throughput sequencing. The changes in temperature, humidity, and CO2 concentration were collected by sensors. In addition, we analyzed principal component analysis, species composition, species differences, and community differences of fungi. There was an obvious separation of the fungal communities under different storage conditions and times. Many fungal genera were gradually decreasing during storage and were eventually undetectable, and many fungal genera that were undetectable at first gradually increased during storage and even became dominant fungal genera. The competition between fungi was fierce. The competition between fungi were affected by the presence of DON. As the initial DON content increased, the contribution of inter-group differences became more obvious. The temperature, humidity, and CO2 concentration of wheat in the silo's environment changed with extended storage time. The content of DON decreased with extended storage time. We had investigated the changes in DON content and their correlation with the changes in fungal communities and environmental factors, which showed a high degree of correlation. This study offers theoretical justification for optimizing safe wheat grain in traditional storage conditions.

A hybrid adsorption / ultrafiltration membrane process for removal of Cs-137 from radioactive wastewater using natural clay adsorbent

The removal of radioactive cesium element (Cs-137) from wastewater is relatively challenging due to its high diffusion coefficient, short hydration radius, and the similarity between its chemical behavior to other alkali metals having high background concentrations, leading to a competition that reduces the removal efficiency of cesium (Cs-137). This study introduces an innovative treatment process using a submerged membrane adsorption hybrid system (SMAHS) using natural Iraqi clay minerals as adsorbents. The operational conditions were studied using the (SMAHS) continuous flow operation in stirred filtration mode experiments. The maximum operational conditions were achieved for the initial radioactivity concentration of Cs-137 at 7201.8 Bq/L, clay dose 1 g/L, the stirring speed at 700 rpm, pH =6, the transmembrane pressure (TMP) under 2 bar, and temperature at 25 °C. The SMAHS rejection percentage of Cs-137 was 93.6 % and the permeate flux was 105.6 L/m2.h at the best operational conditions. This study demonstrates that utilizing raw bentonite which is both environmentally friendly and locally available as an adsorbent in the SMAHS has proven its effectiveness for removing Cs-137 from wastewater. The hybrid method effectively immobilizes radioactive waste by converting it from liquid to solid state, leading to an extended and safer storage time.

Unveiling the Preparation and Characterization of Lercanidipine Hydrochloride in an Oral Solid Self-Nanoemulsion for Enhancing Oral Delivery.

Chronic kidney disease (CKD) is becoming increasingly prevalent worldwide, particularly among the elderly, along with an increase in the incidence of hypertension and cardiovascular disorders. Developing lipid-based oral dosage forms with a higher expected bioavailability of antihypertensive drugs with nephroprotective effects poses a challenge. Lercanidipine hydrochloride (LRCH) is a newer type of third-generation dihydropyridine calcium channel blocker that functions as an antihypertensive and has significant nephroprotective effects. Due to its extensive first-pass metabolism, its bioavailability is about 10% and increases to 3-4 times when taken with a high-fat meal. Targeting this drug to the lymphatic system using the solid self-nano-emulsifying drug delivery system (SSNEDDS) is a promising approach for improving LRCH's bioavailability and dispersion rate. SSNEDDS combines the benefits of both liquid self-emulsifying and solid dosage forms, improving drug stability and extending storage time. In this study, liquid SNEDDS composed of 10% peppermint oil, 67% Tween 20, and 22.5% propylene glycolwas solidified using two adsorbent agent mixtures (SSNEDDS1: Avicel PH 101 and Aerosil 200) and (SSNEDDS2: Avicel PH 102 and Aerosil 200) separately. The prepared formulations were evaluated for powder flow, drug content, and an in-vitro dispersion test in comparison to the brand-marketed tablet as a standard or pure drug. DSC and X-ray diffraction analysis were also used. The SSNEDDS2 shows excellent flowability, a higher drug content (99.761%), and a significantly higher and faster dispersion rate of 100% within 10 minutes compared to 92% of the marketed LRCH tablet and 18.1% of the pure drug for 60 minutes. The solid-state characterization of the formulation composed of SSNEDDS2 confirmed that the LRCH was in an amorphous form inside the solidified nano system without interacting with the excipient. This study successfully prepared LRCH using the promising strategy of SSNEDDS as a hard gelatin capsule with a higher dispersion rate. It improved its stability and expected bioavailability compared to the brand-marketed tablet as the standard.

PSI-5 Evaluation of EhV (surrogate for African swine fever virus) inactivation in corn- and soybean-based feed ingredients and diets at various times and temperatures during storage

Abstract African swine fever virus (ASFV) is a member of the nucleocytoplasmic large DNA viruses (NCLDVs) and remains stable in a variety of environments, including animal feed ingredients as shown in previous laboratory experiments and simulations. Emiliania huxleyi virus (EhV) is another member of NCLDV, which has a restricted host range limited to a species of marine algae called Emiliania huxleyi. This algal NCLDV has many similar morphological and physical characteristics to ASFV which makes it a safe and reliable surrogate for studying ASFV survival and inactivation in feed ingredient matrices in-situ under various time and temperature storage conditions. The objective of the present study was to investigate the inactivation of ASFV in various feedstuffs under a wide range of time and temperature conditions during storage using EhV as a surrogate. Corn- and soybean-based feed ingredients including corn, corn fermented protein, distiller dried grains with solubles, extruded soybean meal, high protein distiller’s grains, solvent-extracted soybean meal, soybean hulls, complete feed, and a positive control (no matrix) were inoculated with EhV (1 × 108 viruses/mL). Negative controls were inoculated with medium containing no EhV for each matrix. To assess the effects of different times and temperatures of storage, all samples were stored at temperatures of 4, 24, and 34 °C for 1, 5, 60, and 120 d. For each timepoint and temperature combination, samples were evaluated for virus presence (qPCR) and viability using a previously validated viability qPCR (v-qPCR) method. On average, we observed a 0.2 log reduction in viable viral DNA content over the 120-d period, with a 0.1 log reduction across varying temperatures. No reductions in EhV viability exceeding 1 log were detected for any matrix and the positive control at any time and temperature combination evaluated. No EhV was recovered from the negative control samples. Given that the experimental error was calculated to be within the range of 1 log, we concluded that storing EhV at 4, 24, or 34 °C for up to 120 d did not result in the inactivation of EhV in any of the ingredients, complete feed, or the control with no matrix. These results demonstrate that ASFV-like NCLDVs is extremely resilient and can maintain viability in various feed matrices during long-term storage and suggest that extending storage time alone may not be an effective mitigation practice against African swine fever virus.

Purified Granulocyte Concentrates from Buffy Coats with Extended Storage Time

Background: Granulocyte concentrates (GCs) are usually prepared by single-donor apheresis after G-CSF pretreatment and have to be transfused within 24 h after cell collection because of the rapid decrease in pH and cell survival due to high lactate production by red blood cell contamination. GCs pooled from buffy coats of whole blood donations could improve the availability of these products. Methods to reduce red blood cell and platelet contamination may improve storability. We developed a manufacturing process for pooled GCs and investigated cell viability and functionality over time. Methods: Six ABO blood group-identical buffy coats were pooled. Subsequently, the red blood cells spontaneously sedimented after the addition of hydroxyethyl starch. The resulting leukocyte-enriched supernatant was washed twice with saline to reduce platelets and was resuspended in ABO-identical donor plasma. The leukocyte concentrate was transferred to a platelet storage bag and stored up to 72 h at 20–24°C w/o agitation. Cell count and viability, pH, blood gases, phagocytosis, and oxidative burst activity were monitored. Results: The number of red blood cells and platelets was reduced to 0.4% and 6.1% of the baseline levels. About 50% of the original present leukocytes could be extracted (n = 76). In the course of 72 h of storage, there were no significant changes in white blood cell counts (p = 0.12). The viability exceeded 98% during the entire period. The rate of granulocytes performing phagocytosis and oxidative burst remained above 95% anytime. Conclusion: GCs prepared from pooled buffy coats provide a precious alternative to granulocytes obtained from apheresis. Reduction of red blood cells and platelets by more than 90% extends the maximum shelf life of GCs from 24 h to 72 h. For a therapeutic dose of at least 1 × 1010 granulocytes, 15–20 buffy coats are required.

Investigating the characteristics of biomass wastes via particle feeder in downdraft gasifier

Particle feeding plays a crucial role in the gasifier due to its effects on the efficiency and performance metrics of the thermochemical process. Investigating particle size distribution's impact on downdraft gasification reactor performance, this study delves into the significance of feedstock characteristics (moisture, volatile matter, fixed carbon, and ash contents) during the particle feeding stage. Various biomass wastes (date palm waste, olive pomace and sewage sludge) at diverse compositions and sizes are subjected to empirical determination of mass flow rates (MFR), power ratings, and storage times for each feedstock. The preheating process in the gasifier is considered, employing both an approximation and analytical solution. In addition, the influence of the equivalence ratio (ER) on the syngas yield is analyzed. The collected data reveals that for average particle size of 200 μm, the highest MFR (in g/min) are 0.518 ± 0.033, 7.691 ± 0.415, and 16.111 ± 1.050, for palm wood biomass, olive pomace and sewage sludge, respectively. Smaller particles (80 μm) led to extended storage times. Moreover, the lumped capacitance approximation method consistently underestimates preheating time, with a percentage error of 6.26%–17.08%. Response surface methodology (RSM) optimization analysis provides optimal gasification conditions for palm wood biomass, olive pomace, and sewage sludge with maximum cold gas efficiencies (CGEs) of 58.01%, 63.29%, and 52.27%. The peak conversion was attained at gasification temperatures of 1089.83 °C, 1151.93 °C, and 1102.91 °C for palm wood biomass, olive pomace, and sewage sludge, respectively. In addition, gasification equilibrium model determined optimal gasification temperatures as 1150 °C for palm biomass, 1200 °C for olive pomace, and 1150 °C for sewage sludge with respective syngas efficiencies of 59.62%, 64.13%, and 53.66%. Consequently, the examination of the dosing procedure, preheating dynamics, particle dimensions, ER, storage time, and their combined impacts offer practical insights to effectively control downdraft gasifiers in handling a variety of feedstocks.

Changes in volatile compounds and lipid oxidation in various tissues of Nile tilapia (Oreochromis niloticus) during ice storage.

Changes in the lipid oxidation and volatile compounds of a variety of tilapia tissues (Oreochromis niloticus) including the muscle, gills, and skin during ice storage were investigated by evaluating peroxide values (PVs), lipoxygenase (LOX) activity, fatty acid (FA) composition, and volatile substances. LOX activity and PV were determined in the gills, skin, and muscles throughout 9 days of storage in ascending order to the extended storage time. The highest level of LOX activity was found in the gills, whereas the highest PV was determined in the skin. FA content of all tissues decreased during the storage period. Oleic acid was the predominant monounsaturated fatty acid, whereas linoleic acid and docosahexaenoic acid were the main polyunsaturated fatty acids and omega-3 in all tissues. The fish gills were shown to have the highest level of volatile compounds followed by the skin and muscle, based on headspace solid-phase microextraction coupled with gas chromatography and mass spectrometry. Principal component analysis indicated gradual changes in the volatile compound composition with increasing storage time. 2-Butanone and nonanal in the muscle, 6-methyl-2-heptanone and 2-nonenal in the gills, and 1-heptanol, and 1-nonanol in the skin were found to be the potential freshness indicators. In addition, hexanal could be a general potential marker for measuring the degree of lipid oxidation in all tissues. PRACTICAL APPLICATION: Understanding the volatile compound formation related to lipid oxidation within storage time at various tissues of tilapia could be critical to the side-stream processing to yield the desired quality.

Candidate Gene Transcriptional Signature Unravels the Reprogramming Occurring in the Peel of Apple Fruit of ‘Granny Smith’ During Postharvest Storage

AbstractAfter harvest fruit are stored to preserve the quality features established during the on-tree development and maturation, ensuring thus a continuous availability of fresh fruit on the market. For certain fruit species like apple, storage can last for almost a year, especially when coupled with several strategies, such as the reduction of the oxygen concentration or the application of ethylene competitor molecules, like 1-methylcyclopropene (1-MCP). To guarantee the maintenance of the highest quality, the monitoring of the physiological processes ongoing during the postharvest ripening is compelling. For this purpose, 16 genes belonging to key fruit ripening pathways, such as the ethylene and the sugar/fermentation metabolism, have been chosen as potential markers for the molecular characterization of the major changes occurring in the fruit during storage. Among these genes, ACS, PPO, PG1, RAP2-like, and ADH exhibited the most significant differential expression across the various samples. Based on the transcriptional pattern, this set of genes constitutes a valuable molecular tool for a precise and reliable RNA-based monitoring of the postharvest ripening progression and fermentation process in apples. PPO, together with S6PDH, were furthermore employed to inspect the onset of the superficial scald in apple and resulted to correlate with the evaluation of the incidence of this disorder and the accumulation of the sugar alcohol sorbitol, known to play important protecting roles to chilling injuries. The assessment of the transcriptional signature of these elements can facilitate the development of gene expression markers suitable for a more informed investigation of the physiological progression of the postharvest ripening in apples, ultimately leading to the promotion of high-quality stored apples, extending storage time while minimizing postharvest disorders and fruit loss.

Solar Thermal Energy Storage Systems Based on Discotic Nematic Liquid Crystals That Can Efficiently Charge and Discharge below 0 °C

AbstractSolid‐state solar thermal fuels (SSTFs) serve as efficient means of storing solar energy as chemical potential energy in a closed loop system and releasing it as heat on‐demand. An ideal SSTF requires photoswitchability in visible‐region without any external heating as well as extended storage times. However, existing systems often rely on ultraviolet (UV) light or heating for photoswitching, or suffer from low storage times. Addressing this, a novel strategy is presented to obtain visible‐light responsive SSTFs designed to operate effectively at room‐temperature or sub‐zero temperatures by innovatively integrating a tetra‐ortho‐fluoro/chloro azobenzene arm in triphenylene based liquid crystal (LC) moiety. The resulting compounds exhibit discotic nematic (ND) mesophases till −6.5 °C. These compounds exhibit excellent photocyclability, photostability, and sufficient half‐lives of cis states. Achieving up to 77% charging under sunlight with a bandpass filter and 62.4% without it, these systems uniquely demonstrate efficient chargeability and dischargeability at sub‐zero temperatures. Upon discharging, temperature rise of up to 6.5 and 29.5 °C occur at room‐temperature (25 °C) and sub‐zero temperatures (around −6 to −7 °C), respectively. This efficacy is attributed to less‐ordered ND phases providing conformational freedom for photoisomerization at low temperatures.

Assessing the efficacy of agricultural cold chain facility expansion in China

This study determines the effectiveness of agricultural cold chain facilities in preserving quality and extending storage time of vegetables and fruits in China. National data were collected through interviews with 10,263 farmers across all provinces except Tibet. Using ordinary least squares regression analysis, several conclusions and policy implications emerge. First, cold chain facilities significantly reduce loss ratios (about 2% on average) and extend storage days for fruits (up to 28 days), but some facilities fail to demonstrate significant effects for vegetables. This implies that stakeholders, especially vegetable producers, must strategically select storage methods. Second, regional disparities exist, with the less developed Northwest facing more acute post-harvest losses, underscoring the need for tailored interventions addressing infrastructure gaps. Third, cold chain transportation distinctly influences vegetable preservation, decreasing losses and storage time. Improving vegetable transport efficiency benefits farmers and consumers. Fourth, supporting facilities like packing houses extend storage days for fruits and vegetables, highlighting the need to construct such infrastructure especially where shipping is limited. Moreover, with the projected expansion of cold chain facilities in China, these findings offer crucial guidance for policymakers, agencies, and farmers in selecting and distributing infrastructure to mitigate losses and support agricultural sector growth. As China advances its cold chain capabilities, this study demonstrates the vital role of such facilities in enhancing food security, reducing waste, and providing fresh produce to consumers.

Characterisation of storage efficiency in magnetic field for extending coherence time of Pr:YSO quantum memory

Quantum memory (QM) is vital in enabling the storage and retrieval of photonic quantum states. Quantum repeaters that circumvent transmission losses over long distances can be realised by loading QMs inside. In this study, we implement spin-wave (SW) storage to extend storage time using Pr-based atomic frequency comb (AFC) QM. Furthermore, the generation of an AFC under a static magnetic field was investigated. The AFC QM was prepared with 2.5 μs of the storage time and the SW storage of 50 μs was demonstrated with and without a magnetic field. This study provides a basis for improving Pr-based AFC systems.

Eating Quality of Australian Grass and Grain-Fed Lamb Equally Rated by US Consumers.

Anecdotal suggestions that US consumers perceive Australian sheepmeat as more "gamey" or "stale" compared to US sheepmeat are potentially attributable to the extended chilled shipping times contributing to longer-aged meat and predominately pasture-fed grazing systems. This study evaluated the impact of diet and extended storage times on Australian sheepmeat using sensory scores as assessed by US consumers. Meat samples from Australian sheep (n = 80) fed a grass or grain diet were aged in a vacuum at 1-2 °C for 5, 21 or 45 days. Untrained consumers (n = 960) at Texas Tech University (Lubbock, Texas) assessed samples for overall liking, tenderness, juiciness and flavour using a scale from 1 (worst) to 100 (best). In general, US consumers scored grain- and grass-fed samples within the same storage period similarly (p > 0.05). Furthermore, storage from 5 to 21 days improved sensory scores by a maximum of 28.6 for tenderness for grass-fed outside cuts (p < 0.05), while storage for 21 to 45 days did not improve eating quality for most cuts of both diets (p > 0.05). This is an interesting finding for the Australian sheepmeat industry as long storage time has no negative effect on eating quality and US consumers enjoyed grass- and grain-fed sheepmeat equally.

Compatibility Study of Peptide and Glycerol Using Chromatographic and Spectroscopic Techniques: Application to a Novel Antimicrobial Peptide Cbf-14 Gel.

The interactions between active pharmaceutical ingredients (APIs) and excipients may lead to API degradation, thereby affecting the safety and efficacy of drug products. Cbf-14 is a synthetic peptide derived from Cathelicidin-BF, showing potential for bacterial and fungal infections. In order to assess impurities in Cbf-14 gel, we developed a two-dimensional liquid chromatography coupled with quadrupole/time-of-flight mass spectrometric method. A total of eleven peptide degradation impurities were identified and characterized. Furthermore, the compatibility tests were conducted to evaluate the interactions of Cbf-14 with glycerol and methylcellulose, respectively. The results revealed that the impurities originated from condensation reactions between Cbf-14 and aldehydes caused by glycerol degradation. Several aldehydes were employed to validate this hypothesis. The formation mechanisms were elucidated as Maillard reactions between primary amino groups of Cbf-14 and aldehydes derived from glycerol degradation. Additionally, the compatibility of Cbf-14 with glycerol from different sources and with varying storage times was investigated. Notably, the interaction products in the gel increased with extended storage time, even when fresh glycerol for injection was added. This study offers unique insights into the compatibility study of peptides and glycerol, contributing to the ongoing quality study of Cbf-14 gel. It also serves as a reference for the design of other peptide preparations and excipients selections.

Microbial assessment of poultry farm biosecurity. Proceeding of The First International Avian Influenza Summit, University of Arkansas- October 16-17, 2023”

Biosecurity may be defined as protection from pathogens or disease. This may include the separation of the flock from living vectors or inanimate objects called fomites. While prevention of host-specific and zoonotic diseases is important, the commercial poultry industry is already preoccupied with the challenges of day-to-day operations. The purpose of this project was to illustrate how surfaces that may seem clean are heavily contaminated with microorganisms that may be responsible for human and avian diseases. We also evaluated three common intervention strategies, including disposable boot covers, foot baths, and tire disinfection. Poultry environmental samples were collected at the Texas A\&amp;M University Poultry Science Research Center, including fan shrouds, side air inlets, cool cell reservoirs, truck tires, truck floor mats, doorknobs, controller panels, a bioaerosol air sampler, and an impactor air sampler. A total of 30 samples were collected per sample type, which was homogenized, serially diluted, and spread plated onto agar media to culture total aerobes, Staphylococci, and coliform bacteria. 6.6 log10 colony-forming units cfu/cm2 of aerobic bacteria were found at the greatest concentration, followed by Staphylococci (5.6 log10 colony-forming units cfu/cm2) and coliforms (2 log10 colony-forming units cfu/cm2). This pattern was observed in most of the samples. Boot covers, foot baths, and tire disinfection were tested for efficacy. While disposable boot covers significantly reduced the number of aerobes, Staphylococci, and coliforms, as many as 300 microorganisms per cm2 still made it through to the inner boot cover. Disinfectants are commonly misused due to not properly clearing the surface prior to application or allowing the proper contact time. We found that while disinfection significantly reduced these indicator organisms, that reductions were only 10 to 100-fold, leaving many viable bacteria behind. Increased contact time from 3 seconds to 10 minutes resulted in significant reductions of aerobes and Staphylococcus. The tire wash data mirrored our foot bath data. Data was shared from previous laboratory and field trials. Less than 1% sterile poultry litter significantly reduced disinfectant efficacy across four product categories. Extended storage time of 30 weeks reduced product efficacy as well. We shared electron micrographs to illustrate how visually clean and smooth surfaces provide many hiding places for microbes, reducing disinfectant efficacy. While risk can never be reduced to zero, it may be reduced and controlled with good management practices. Cleaning and disinfection should follow a five-step process of dry cleaning, soap wash, rinse, drying, and finally disinfection. Labels should be read closely so that the product is used safely and effectively. While there are many viable products on the market, disinfecting a clean surface and following recommendations for contact time are very important to get the best results. Following best management practices such as reducing pest (insect/rodent) harborage and following your integrated pest management program will help reduce risk significantly.

Evaluation of Platelet Storage Lesion (PSL) Markers in SSP+ Platelet Additive Solution Added Canine Platelet Concentrates (CPC)

Background: To evaluate the Platelet Storage Lesion (PSL) markers and extended storage time for SSP+ added Canine Platelet Concentrates (CPC) beyond five days at 22°C.Fresh Canine CPCundergo certain metabolic and morphologic changes during storage. Estimation of PSL markers helps us better understand quality of the canine PC and to estimate the efficacy of SSP+ in increasing the life span of stored CPC. Method:CPC was prepared from 350 ml of whole blood, collected from 6 apparently healthy donor dogs by buffy coat methodin a quadruple bag closed system. CPC was divided into four aliquots of 15 ml each with one control and three test groups with SSP+ additive solution in different concentrations (65%, 75%, 85%). TheIn vitro PSL markers including swirling, pH, glucose, lactate, bicarbonate, pO2, pCO2, platelet concentration, MPV and PDWwere evaluated on day 1, 5, 9 and 13 of storage. Result:The results were analysed by Two-way ANOVA wherein swirling, pH, glucose, lactate, bicarbonate, pO2, pCO2, platelet concentration, MPV showed significant difference (p less than 0.01) between the groups. Interaction between the additive concentrations and the days of storage revealed a pH on day 9 for 65% SSP+ to be similar to day 5 for Plasma stored CPC while swirling, lactate and bicarbonate were also better maintained for 65% SSP+ PAS added CPC till day 9.Addition of 65% SSP+ PAS to CPC evidenced increased shelf life up to 9 days at 22°C under agitation without significant deterioration in product quality.

Improved colloidal and oxidative stability of krill oil using natural biopolymers via spray drying microencapsulation

AbstractKrill oil possesses strong antioxidant activity but has limited applications in the food industry due to its poor aqueous solubility, strong off‐flavours and susceptibility to oxidative degradation. This study was aimed to improve the colloidal and oxidative stability of krill oil via microencapsulation using spray drying. Whey protein isolate (WPI), maltodextrin (MD), carboxymethyl starch (CMS) and n‐octenylsuccinate starch (OSAS) were used as the microcapsule wall materials. The results showed that WPI+MD microcapsules had the optimum characterised properties compared to WPI+CMS and WPI+OSAS microcapsules. WPI+MD microcapsules possessed the highest encapsulation efficiency of 76.59%. The optimal air inlet temperature was 165°C, providing a high krill oil encapsulation efficiency and reducing concaveness on the microcapsule surfaces. Krill oil was distributed homogeneously inside the capsules and presented a good colloidal stability during an extended storage time. The antioxidant capacity against heat was simultaneously increased owing to the improved oxidative stability by microencapsulation. Consequently, this study provides useful guidelines for improving the stability and application of krill oil in the food industry.

Based on HS-SPME-GC-MS combined with GC-O-MS to analyze the changes of aroma compounds in the aging process of Citri Reticulatae Pericarpium

Citri Reticulatae Pericarpium (CRP) is a very well-known foodstuff. It can not only be drunk directly like tea, but also be used as a condiment for cooking food. This study used headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME-GC-MS), gas chromatography-olfactometry-mass spectrometry (GC-O-MS), and sensory evaluation to analyze and evaluate CRP over the six-year aging process (2, 5, 10, 15, 20, and 25 years). HS-SPME-GC-MS identified 93 volatile components, while GC-O-MS detected 42 aroma compounds. The results indicated that the aroma intensity (AI) of the spicy, woody, and herbal aroma compounds remained unchanged, while those with citrus and fruity notes gradually decreased and even disappeared with extended storage time, which could explain the unique CRP aroma. Orthogonal partial least squares discriminant analysis (OPLS-DA) showed that the CRP in the six-year aging process was clearly divided into three groups: young-aged samples (2Y), middle-aged samples (5Y and 10Y), and old-aged samples (15Y, 20Y, and 25Y). In addition, combining sensory evaluation and GC-O-MS fully reflected the changes during the different CRP aging stages. This study confirmed the potential of combining GC-O-MS and OPLS-DA as a reliable analytical selection technique to distinguish CRP age. Finally, 13 key aroma compounds were screened using VIP >1 and p < 0.05, including isopulegol, dodecanal, and α-calacorene.

Effect of Freezing Process on the Chemical Properties of Blue Swimming Crab Portunus segnis: Storage Stability and Acceptability

ABSTRACT The effect of frozen storage at a commercial temperature (−30°C) on the nutritional characteristics of the blue swimming crab Portunus segnis for a period of 120 days was investigated. Lipid and protein oxidation was investigated by analyses of peroxide value, thiobarbituric acid reactive substances, free fatty acids, and advanced oxidation protein products. Results showed significant lipid deterioration with extended storage time and changes in fatty acids composition and lipid classes. From a nutritional standpoint, it would be preferable for human consumption to eat frozen crabs for no more than 30 days as they retain a higher nutritional value.