scholarly journals AMMONIA AND NITRATE FLUCTUATIONS IN STORED WATER SAMPLES

HortScience ◽  
1991 ◽  
Vol 26 (5) ◽  
pp. 484e-484
Author(s):  
D.C. Fare ◽  
C.H. Gilliam ◽  
G.J. Keever ◽  
J.T. Touchton
Keyword(s):  
Sulfuric Acid ◽  
Water Samples ◽  
Room Temperature ◽  
Storage Period ◽  
Storage Conditions ◽  
Nitrate Concentrations

Water samples containing 0, 2.5, 10.0, or 20.0 ppm nitrate and ammonia were evaluated under 3 temperatures (0, 6, 20C) plus or minus sulfuric acid (36N) for changes in concentration. Ammonia and nitrate levels were measured 0, 1, 2, 4, 8, 16, 24, and 32 weeks after storing. Response to storage conditions was the same regardless of acid or concentration of ammonia or nitrate. Nitrate concentrations in the storage locations were similar for the first 2 weeks. Afterwards, treatments stored at room temperature fluctuated from initial standards. With ammonia, frozen samples had the greatest deviation from initial standards during the first 4 weeks. By week 24, ammonia samples stored at room temperature had exceeded acceptable deviations from the standards. Nitrate and ammonia samples held in refrigeration had the least fluctuation during the 32 week storage period.

ADRENALINE AMPOULES QUALITY ASSESSMENT–THE ISRAELI EXPERIENCE

2020 ◽  
pp. 144-146
Author(s):  
MEITAL ZUR ◽  
DAVID STEPENSKY ◽  
PAVEL GORENBEIN
Keyword(s):  
High Performance ◽  
Room Temperature ◽  
Storage Period ◽  
Clinical Effectiveness ◽  
Storage Conditions ◽  
Chiral Hplc ◽  
Drug Products ◽  
Variable Content ◽  
Israel Defense Forces ◽  
Israeli Experience

Objective: To characterize the differences in stability of L-adrenaline in adrenaline ampoules from different manufacturers that are used by the Israel Defense Forces (IDF). Methods: Adrenaline ampoules from three different vendors (Products A, B and C; 52, 13, and 19 batches, respectively) were purchased by the IDF and were stored under the recommended storage conditions (room temperature) for different time periods. The content of L-adrenaline in these samples was determined using a chiral high-performance liquid chromatography (HPLC) assay with UV detection. Results: The three analyzed drug products showed very dissimilar patterns of L-adrenaline degradation. The content of L-adrenaline in Product C was variable and declined below the 85% threshold much earlier than at the end of the 24-months storage period. Products A and B had less variable content of L-adrenaline and were more stable. Conclusion: L-adrenaline is prone to degradation in solution. Its content in adrenaline ampoules from certain vendors can decline rapidly, below the stipulated threshold, and compromise their clinical effectiveness (e. g., during resuscitation). Stability of adrenaline ampoules from individual vendors should be analyzed at different storage conditions, using a chiral HPLC-based assay, to define the shelf-life period that can differ substantially between the vendors.

scholarly journals Stability of Anthocyanins, Phenolics and Color of Tart Cherry Jams

Foods ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 255 ◽  
Author(s):  
Vukoja ◽  
Pichler ◽  
Kopjar
Keyword(s):  
Antioxidant Activity ◽  
Sulfonic Acid ◽  
Room Temperature ◽  
Phenolic Content ◽  
Storage Period ◽  
Storage Conditions ◽  
Anthocyanin Content ◽  
Tart Cherry ◽  
Color Parameters ◽  
Textural Parameters

The aim of this work was to assess the effect of a set storage period on the phenolics, anthocyanins, antioxidant activity, color, and texture of three types of jams made from tart cherry. The prepared samples of tart cherry jams were: (1) regular jam; (2) extra jam; and (3) light jam. The samples were stored at room temperature for eight months. Results of the investigated parameters after storage were compared with the results after sample preparations, and between the different jam samples. The light jam had the highest phenolic content and anthocyanin content (3.34 g/kg and 985.52 mg/kg). Consequently, the light jam had the highest antioxidant activity determined by ABTS (2,2'-azinobis(3-ethylbenzothiazoline sulfonic acid)) and DPPH (2,2-diphenyl-1-picrylhydrazil) method. After storage, the highest retention of the phenolics had regular jam and extra jam (85%), while the lowest retention (74%) were found in the light jam. Anthocyanin stability was the highest in the regular jam, then the extra jam (15%), and then the light jam, with retention of 22%, 15%, and 12%, respectively. Color parameters and textural parameters also depended on jam type, as well as on storage conditions. Since the investigated types of jams differed in content of fruit and water, these are the most important factors that cause the change in the retention of phenolics and anthocyanins, as well as a change in color and textural parameters.

scholarly journals Egg quality assessment at different storage conditions, seasons and laying hen strains

2017 ◽  
Vol 41 (3) ◽  
pp. 322-333 ◽  
Author(s):  
Vivian Feddern ◽  
Marina Celant De Prá ◽  
Rúbia Mores ◽  
Rodrigo da Silveira Nicoloso ◽  
Arlei Coldebella ◽  
...  
Keyword(s):  
Specific Gravity ◽  
Room Temperature ◽  
Egg Quality ◽  
Storage Period ◽  
Storage Conditions ◽  
Quality Parameters ◽  
Laying Hen ◽  
Unit Weight ◽  
Internal Quality ◽  
Haugh Unit

ABSTRACT Eggs are one of nearly perfect protein foods, offering nutrients of great biological value. However, during storage, egg albumen and yolk components may alter and deteriorate egg quality. Therefore, the aim of this work was to assess egg quality during 9-week storage. Parameters such as Haugh unit, weight loss, egg width and length, specific gravity, yolk and albumen dimensions and their pH were evaluated weekly. A total of 270 eggs (n=5) collected from two different hen strains were evaluated under room (20 to 35 °C in summer; 11.2 to 29.7 °C in autumn) and refrigerated (0 to 5 °C in summer; -3.1 to 6.5 °C in autumn) temperatures. For storage time, an unfolding analysis was accomplished by regression analysis using orthogonal polynomials. As a second approach, principal component analysis (PCA) was performed in order to assess correlations among quality parameters on storage conditions and laying hen strains. By the end of the 9-week storage period, eggs kept under refrigeration presented similar quality parameters to eggs stored at room temperature for only 3 weeks. In contrast, eggs kept at room temperature presented faster degradation from week 1 to 5. No differences on egg quality parameters were noticed between white and brown shells eggs. PCA suggests that better egg quality (first week) was associated mainly with higher egg weight and its specific gravity, Haugh unit and albumen height. Eggs stored at room temperature should be consumed in 2 weeks or refrigerated until 8 weeks, preserving internal quality from farm to retail.

scholarly journals Effects of Storage Conditions on Postharvest Qualities in Garlic Bulbs (Allium sativum L.)

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 805C-805
Author(s):  
Sun-Tay Choi ◽  
Ro-Na Bae* ◽  
Dae-Sung Chung ◽  
Seung-Koo Lee
Keyword(s):  
Weight Loss ◽  
Low Temperature ◽  
Pyruvic Acid ◽  
Room Temperature ◽  
Allium Sativum ◽  
Storage Period ◽  
Storage Conditions ◽  
Controlled Atmosphere ◽  
Atmosphere Storage ◽  
And Storage

To investigate quality changes of garlic associated with cultivars and storage conditions, northern type `Seosan' and sub-tropical type `Daeseo' garlics were stored at controlled atmosphere (O2 3%, CO2 5%, -1 ± 1°C) condition, low temperature (-1 ± 1°C), and room temperature (20 ± 5°C). The rate of sprouting, weight loss, enzymatic pyruvic acid content, and degree of greening in crushed garlic were determined during storage. The rate of sprouting was higher in `Daeseo' than in `Seosan' garlic in all storage conditions. Sprouting was effectively suppressed in low temperature and controlled atmosphere storage. Weight loss in `Daeseo' garlic was higher than in `Seosan' garlic. Enzymatic pyruvic acid (EP) contents increased for 3 months storage period, and then decreased gradually as the storage period was prolonged at room or low temperatures. However, EP content decreased dramatically during storage under CA condition in both cultivars. When garlic bulbs were crushed, greening appeared in the garlic stored at low temperature for more than one month. However, greening did not occur in the crushed garlic bulbs stored in CA condition.

scholarly journals Changes in the Physicochemical Quality Characteristics of Cabbage Kimchi with respect to Storage Conditions

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Su-Yeon You ◽  
Ji-Su Yang ◽  
Sung Hyun Kim ◽  
In Min Hwang
Keyword(s):  
Organic Acids ◽  
High Performance ◽  
Room Temperature ◽  
Gradual Increase ◽  
Storage Period ◽  
Storage Conditions ◽  
Quality Characteristics ◽  
Analytical Technique ◽  
Ph Values ◽  
Organic Acid Content

In this study, the changes in pH, organic acid content, acidity, and salinity of kimchi prepared at 0 days, stored 1–8 weeks at 4 and 10°C, and stored at room temperature for two days were analyzed. Organic acids content was analyzed by using analytical technique of high-performance liquid chromatography (HPLC). This method was also validated using quality assurance parameters of linearity, limits of detection and quantification (LOD and LOQ), precision, and spike recovery experiments. In the analysis of organic acids content (mg/kg), it was found that the kimchi stored for 1–8 weeks at 4 and 10°C showed gradual increase in the organic acids content during storage period. The order of organic acids was lactic acid > acetic acid > citric acid > malic acid > succinic acid > oxalic acid > fumaric acid. The pH values of kimchi stored at 4°C, 10°C, and 25°C were 4.1, 3.6–3.7, and 4.1, respectively.

scholarly journals Investigation of quality indicators and studying the stability of “Propolis-AK” gel for the treatment of acne disease

2019 ◽  
pp. 64-75
Author(s):  
А. I. Tykhonov ◽  
T. G. Yarnykh ◽  
S. G. Bobro ◽  
O. S. Shpychak
Keyword(s):  
Quality Control ◽  
Shelf Life ◽  
Quality Indicators ◽  
Room Temperature ◽  
Storage Period ◽  
Storage Conditions ◽  
Social Adaptation ◽  
Control Methods ◽  
Aluminum Tubes ◽  
The Stability

In modern conditions, the incidence of acne, which is a polymorphic multifactorial disease of the sebaceous glands of the skin, has a tendency to significant growth. Localization of lesions on the face in almost all patients indicates the fact that acne has an effect on their psycho-emotional sphere and social adaptation, which makes this problem urgent and indicates the feasibility of creating new effective domestic medicines for treating this pathology. The aim of the work was to conduct research on the investigation of quality indicators and studying the stability of «Propolis-AK» gel of anti-inflammatory and antimicrobial action for the treatment of acne disease. The objects of research were model test-samples of «Propolis-AK» gel, for which were developed methodic for analyzing the qualitative composition and quantitative content of the active substances – propolis phenolic hydrophobic drug (PPHD) and azelaic acid (AA) in this dosage form, comprehensively allowing to evaluate the quality and criteria for the stability of the gel during the entire storage period for the following indicators: description, identification, homogeneity, tightness of the container, pH, package contents, microbiological purity, quantification. In addition, the requirements for packaging, labeling, transportation, storage conditions and shelf life were included in the draft of quality control methods. According to the results of the study of organoleptic and physical-chemical parameters of the developed «Propolis-AK» gel during storage at two temperature conditions (8‒15 °C and 15‒25 °C), it was found that the test samples of the gel under study remained fairly stable according to the studied indicators for 2 years and 3 months, which allows us to recommend a shelf life of 2 years at room temperature in aluminum tubes for the studied gel. According to the results of research, a specification for «Propolis-AK» gel for external use was developed as a component of the draft of quality control methods for the studied medicine. Studies have been conducted to establish the main indicators and methods of quality control of the developed «Propolis-AK» gel for the treatment of acne disease. According to the results of the tests, a “Specification” was developed, which was included in the draft of quality control methods and experimentally proved the stability of «Propolis-AK» gel prepared in pharmaceutical and industrial conditions for a prescribed shelf life of 24 months when stored in aluminum tubes with an internal lacquer coating in a cool place (8‒15 °C) and at room temperature (15‒25 °C).

scholarly journals Storage on the vigor and viability of macauba seeds from two provenances of Minas Gerais State

2016 ◽  
Vol 46 (11) ◽  
pp. 1932-1937 ◽  
Author(s):  
Patrícia Pereira de Souza ◽  
Sérgio Yoshimitsu Motoike ◽  
Mychelle Carvalho ◽  
Kacilda Naomi Kuki ◽  
Eduardo Euclydes de Lima e Borges ◽  
...  
Keyword(s):  
Moisture Content ◽  
Room Temperature ◽  
Germination Rate ◽  
Storage Period ◽  
Storage Conditions ◽  
Minas Gerais ◽  
Biodiesel Production ◽  
Seed Moisture Content ◽  
Energy Field ◽  
Minas Gerais State

ABSTRACT: Macauba palm stands out for having favorable features to biodiesel production such as the high oil content of its fruit. Considering the great potential of the species and their applicability in the renewable energy field, it becomes indispensable to establish the right conditions for storing the seeds for propagation purpose. The aim of this research was to evaluate the effect of seed moisture content, packaging, and storage conditions such as temperature and relative humidity on the quality of seeds from Minas Gerais State, during a 12-month storage period. The research had two independent assays: (I) the seeds were stored with three moisture contents/ranges 4.0≤6.0%; 6.0≤8.0% and 8.0≤10.0% in impermeable packages, under room temperature and at 10ºC; (II) seeds with approximately 5.9% of moisture content were stored in three different types of packages: a) permeable, b) semi-permeable and c) impermeable. Three storing conditions were tested: a) room temperature and RH under laboratory conditions; b) 15ºC and 45% RH; c) 20ºC and 55% RH. Water content, germination rate and germination speed index were evaluated at 0, 4, 8 and 12 months of storing. The best germination results were obtained with the moisture range of 6.0≤8.0%, with seeds kept at room temperature; while the seeds stored at 10ºC, regardless the moisture range, did not survive. The stored seeds with 5.9% moisture content and at both 15ºC/45%RH and 20ºC/55% RH conditions, independently of the package type used, showed the best results. Thus, macaw palm seeds can be classified as intermediates seeds.

Efficacy of the Antigenicity-Retaining Ability of Fixative Solutions for Liquid-Based Cytology: Immunocytochemistry of Long-Term Storage

2021 ◽  
pp. 1-12
Author(s):  
Hiaki Sato ◽  
Yoshiaki Norimatsu ◽  
Satoshi Irino ◽  
Takeshi Nishikawa
Keyword(s):  
Cell Membrane ◽  
Room Temperature ◽  
Storage Temperature ◽  
Storage Period ◽  
Storage Conditions ◽  
Immunocytochemical Staining ◽  
Long Term Storage ◽  
Liquid Based Cytology ◽  
Term Storage

<b><i>Introduction/Objective:</i></b> Liquid-based cytology (LBC) is advantageous as multiple stained specimens can be prepared and used for additional assays such as immunocytochemical and molecular-pathological investigations. Two types of preservative-fixative solutions (fixatives) are used for nongynecologic specimens used in the BD SurePath-LBC (SP-LBC) method, and their components vary. However, few studies have evaluated the differences in antigen-retaining ability between these fixatives. Therefore, we investigated and compared the antigen-retaining ability of the fixatives in immunocytochemical staining (ICC) under long-term storage conditions. <b><i>Materials and Methods:</i></b> Sediments of cultured RAJI cells (derived from Burkitt’s lymphoma) were added to each fixative (red and blue) and stored at room temperature for a specified period (1 h; 1 week; and 1, 3, and 6 months). The specimens were then prepared using the SP-LBC method and subjected to ICC. Positivity rate was calculated using the specimens fixed at room temperature for 1 h as a control. Antibodies against Ki67 expressed in the nucleus and against CD20 and leukocyte common antigen (LCA) expressed on the cell membrane were used. <b><i>Results:</i></b> For CD20 and LCA, the positivity rate increased with time in the red fixative compared with that in the control. In the blue fixative, the positivity rate was highest at 1 h and was maintained at a high level throughout the storage period. In contrast, the Ki67 positivity rate was highest at 1 h in both red and blue fixatives and markedly decreased with time. Therefore, although refrigerated (8°C) storage was used, no improvement was noted. <b><i>Conclusions:</i></b> Long-term storage is possible for cell membrane antigens at room temperature; however, it is unsuitable for intranuclear antigens. Therefore, we conclude that suitable fixative type and storage temperature differ based on antigen location. Further investigation is warranted.

scholarly journals MODELS FOR THE PREDICTION OF QUALITY PARAMETERS OF TABLE EGGS STORED UNDER DIFFERENT CONDITIONS

2021 ◽  
Vol 23 (2) ◽  
pp. 179-184
Author(s):  
A. ESSIEN ◽  
L. EBOH ◽  
S. E. EMURASHE
Keyword(s):  
Weight Loss ◽  
Room Temperature ◽  
Egg Quality ◽  
Storage Period ◽  
Predictive Ability ◽  
Storage Conditions ◽  
Percentage Weight Loss ◽  
Storage Duration ◽  
Percentage Weight ◽  
Haugh Unit

A total of 144 newly - laid eggs obtained from Lohmann Brown layers were distributed and stored under three storage conditions: room temperature, polythene bag/room temperature and refrigeration. Changes in Haugh unit, yolk ), index and percentage weight loss were evaluated between 0 and 14 days at intervals of two days each, Haugh unit, yolk index, and albumen have significantly (P>0.001), while percentage weight loss increased (P<0.001) with storage duration, Generally, quality on the parameters of refrigerated eggs were significantly (P<0.05) higher than those stored used in polythene bag or those stored open in the room o. Polythene-bagged eggs had the least percentage weight loss. Significant (P<0.001) storage method x storage duration interactions were obtained. Regressing the internal egg quality measurement (Y) over storage period (X) in simple linear Y = a +bx) or the exponential (Y = ab ). regression functions showed that the predictive ability measured as also the r2 - values was generally higher with the. exponential than the simple linear model. The predictive ability of each egg quality parameter was higher with the polythene - bagged eggs than  with other storage conditions. Using the simple linear prediction model, table eggs purchased randomly from retail egg shops had quality values of eggs that were about 4 - 11 days after lay prior to purchase.

scholarly journals Seed dormancy of Ochradenus baccatus (Resedaceae), a shrubby species from Arabian desert regions

2016 ◽  
Vol 64 (3) ◽  
Author(s):  
Arvind Bhatt ◽  
Félix Pérez-García
Keyword(s):  
Room Temperature ◽  
Water Solution ◽  
Storage Period ◽  
Seed Storage ◽  
Storage Conditions ◽  
Food Sources ◽  
Continuous Darkness ◽  
Physiological Dormancy ◽  
Desert Regions ◽  
One Year

Ochradenus baccatus is a perennial glycophyte growing in Middle East and it is one of the most important food sources for many animal species in desert regions. The aim of our study was to investigate the effects of seed storage, light, temperature and gibberellic acid (GA3) on germination of O. baccatus seeds. We also investigated the germination characteristics of O. baccatus seeds under different saline concentration and their capability to recover germination once they were transferred to distilled water. Seeds were stored at room temperature (20 ± 2 ºC) and at -18 ºC. Germination tests were conducted at alternating temperatures of 15/25, 20/30 and 25/35 ºC in either continuous darkness or photoperiod of 12-h dark/12-h light. To study the effect of GA3 on germination of O. baccatus seeds, freshly-collected seeds and stored seeds were soaked for 24 h in a GA3 water solution (1 g/L) before sowing. To assess the salinity tolerance during germination, seeds were germinated under different salinity levels (100, 200 and 400 mM NaCl). Stored seeds at room temperature and -18 ºC germinate equally well at different temperature regimes and light conditions. However, freshly matured seeds were not able to germinate even when they were treated with GA3. On the contrary, stored seeds at room temperature and -18 ºC treated with GA3 increase the final germination percentages. These results indicated that O. baccatus seeds have physiological dormancy and they need to be stored in order to break their dormancy. In the present study, one year of storage did not show a significant variation in germination between the two storage conditions assayed. Therefore, further research is needed to know about the maximum storage period for O. baccatus seeds under different storage conditions. Very few O. baccatus seeds (less than 5 %) germinated at the tested lowest concentration of NaCl. However, ungerminated seeds were able to germinate when salinity stress was alleviated. In conclusion, O. baccatus seeds have physiological dormancy, and seed storage (at room temperature and at -18 ºC) for one year is effective for breaking this dormancy. In addition, O. baccatus seeds present ability to remain viable in saline conditions and they will be able to germinate once the salinity level decrease.

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