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Copyright of Revista Colombiana de Investigaciones Agroindustriales is the property of Revista Colombiana de Investigaciones Agroindustriales del Centro Agropecuario Sena Buga and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this work, a study of the spring "El Paraíso", located in the El Cristo town, Santiago de Cuba was carried out to evaluate its use by human consumption, as source of supply and irrigation activities for crops. Five samplings were carried out in the dry period of october 2019-february 2020 and subsequent analysis of the physicochemical and bacteriological results in conjunction with the interpretation of integrating indices. The results reflected the contamination of the spring since many parameters such as hydrogencarbonate, nitrate, total and termotolerant coliforms, are outside the established indices. Due to this, the spring waters are not apt like water drinkable, neither for provisioning, which is why necessary treatment according to the contamination degree, although recommended for animal consumption and watering of cultivations. [ABSTRACT FROM AUTHOR]

Copyright of Revista de la Sociedad Química del Perú is the property of Sociedad Quimica del Peru and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Refrigeration is necessary to preserve the quality of watermelon fruits for longer, however, this technology is difficult to access and costly. Therefore, it is necessary to look for alternatives such as the selection of new varieties of watermelon that present good resistance to transport, superior fruit quality and high postharvest shelf life. In this context, the objective in this work was to evaluate the morphological, physicochemical and shelf life characteristics of the fruits of nine varieties of watermelon. It was conducted through a randomized complete block experimental design in a subdivided plot scheme. Nine varieties of watermelon were evaluated in the plots: Explorer, Magnum, Santa Amelia, Top Gun, Crimson Sweet, Electra, PX 397, Charleston Gray and Jubilee, and in the subplots five storage times: 0; 5; 10; 15 and 20 days. The edaphoclimatic conditions of the Amazon Savannah in Roraima, Brazil, favor the morphological, physicochemical characteristics and shelf life of the fruits of the Explore, Santa Amelia and Crimson Sweet varieties. The fruits of the watermelon varieties quickly lose their quality and are not suitable for in nature consumption after 15 days of storage at ambient temperature and relative humidity in the Amazon Savannah of Roraima, Brazil, since the content of ° Brix after this period is less than 9 °. The new studies related to the subject must consider the acceptance of the consumer market of the varieties with the greatest potential obtained. [ABSTRACT FROM AUTHOR]

In this study the behavior of dry bee pollen during storage was evaluated, two storage temperatures 5 and 29 °C and two packaging materials were considered: amber polyethylene terephthalate (PET) bottles and double zipper polyethylene (PE) bags. The dry pollen was carried out physical-chemical measurements (humidity, acidity, pH and proteins) and microbiological (microorganisms at 30 °C, filamentous fungi and yeasts) every seven days to 70 days of storage. It was observed that the pH, acidity and protein values did not vary significantly (p > 0,05) during the period for any of the storage alternatives studied, while the humidity for the samples stored in the bags at room temperature showed an appreciable increase with respect to the initial value, from 5,17 to 7,33 %. In the case of microbiological indicators, no increase was observed during the period. [ABSTRACT FROM AUTHOR]

Introduction: Streams associated with high Andean wetlands are found in environments where conditions are extreme, highly variable temperature, low atmospheric pressure, intense solar radiation. The macroinvertebrate assemblages have been poorly studied compared to streams located at lower altitudes. On a global and regional scale, the characteristics of macroinvertebrates change with the increase in latitude and altitude (decreasing in richness and variation in composition). At the local level, the effect of acidic waters with high conductivity from springs that join streams generate heterogeneity in water quality and consequently in the characteristics of macroinvertebrate structure. Objective: To compare the diversity, composition and abundance of macroinvertebrates and the physicochemical characteristics of stream water in two high Andean wetlands in Peru. Methodology: Eleven stations located in streams of two high Andean wetlands were studied: 7 in Guitarrachayocc (G) of 43 ha (n = 28) and 4 in Pichccahuasi (P) of 28 ha (n = 8). A Surber sampler (0.3 mm mesh, sampling area of 1 200 cm2) was used to carry out monthly samplings from October 2016 to April 2017. Principal Component Analysis (PCA) and Non-Parametric-Multivariate-Analysis-Of-Variance (NP-MANOVA) were applied to compare water characteristics. The macroinvertebrate assemblages from the two streams were compared by using a Principal coordinate analysis (PCoA), NP-MANOVA, and a non-parametric Kruskal- Wallis test (α = 0.05). Results: The characteristics of the water were heterogeneous, with significant differences in pH which ranged from 3.2 (± 0.4) to 7.6 (± 0.1) and conductivity ranging from 168.9 (± 91.0) ÎS / cm to 1 117.0 (± 159.3) ÎS / cm. In particular, G6 presented the lowest pH values and the highest electrical conductivity, as well as chlorides. A total of 8 126 individuals were collected, distributed in 26 taxa from 20 families, 11 orders and five classes. Insects were the most diverse and abundant group. Differences were found between the streams of the highland wetlands, despite their proximity: in G, 25 taxa were registered, with a dominance of Macrelmis sp., Dicrotendipes sp., Claudioperla sp. and Meridialaris sp. and in P, 9, with a dominance of Pedrowygomya sp., Hyalella sp. and Dicrotendipes sp. The density was 475 ind./m2 and 31 ind./m2 for G and P respectively, these values were statistically different (p < 0.05). The PCoA and PCA confirmed by NP-MANOVA showed that G6 was different (p < 0.05) within G because it receives water contribution from a spring. Conclusions: The richness, composition and density of macroinvertebrates were different in streams depending on the bofedal with which it is associated. The contribution of the springs to the streams generates drastic changes in the quality of the water and the macroinvertebrates, determining the formation of assemblages with different richness and structure. [ABSTRACT FROM AUTHOR]

Copyright of Gestión y Ambiente is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The Amazon region of Peru is one of the regions with the greatest potential in the production of natural resources in the country, including native papayas. The objective of this research was to conduct a comparative study of the physicochemical characteristics and shelf life of native papayas such as Papayita del Monte (Carica pubescens Lenné & K. Koch) and babaco (Carica pentagona Heilborn) dehydrated by lyophilization. The physicochemical characteristics as well as the biometric values of both varieties were determined. Additionally, the total polyphenol content was quantified by the spectrophotometric method, the antioxidant capacity by the DPPH method and the shelf life of the freeze dried papayite and tobacco pulps, which were bagged, were determined mathematically. The results indicate that in relation to biometric analyzes such as weight, length and diameter, between papayite and babaco if there is a significant statistical difference (p-value = 0.0001). The comparison of the physicochemical characteristics between papayita and babaco pulps statistically existed a significant difference between them. The comparison between the yields of lyophilized pulps of papayite and babaco was determined a difference of 0.12. In the comparison of the total phenolic content between fresh pulps and lyophilized pulps if there was a significant difference, between papayite and babaco respectively, where it was determined that lyophilized products have a higher total phenolic content, than fresh pulp products. Also, in the antioxidant capacity if there are significant differences between fresh and lyophilized pulps between papayite and babaco. It was also determined that the lyophilized papayite pulp has a higher antioxidant capacity than the lyophilized pulp of the babaco. [ABSTRACT FROM AUTHOR]

The extraction of the oil from the fruit pulp of avocado (persea americana mill. Cv. Hass) at maturity organoleptic treatment corresponding to the day harvested, being the day that presented greater concentration lipid ratio equivalent to 20% ± 2. The extraction system used was a thermomechanical process, the response variable was the oil yield obtained in percentage and the control variable was the extraction temperature. The physico-chemical characterization; index of iodine, index of acidity (%) expressed as acid oleico, index of saponification (mg KOH/g), index of refraction to 25 °C, index of peroxides (meq O2/kg), index of peroxides (meq O2/kg), point of merger (°C), point of smoke (°C), vitamin e, antioxidant capacity, total phenols and lipid profile of fatty acids, was carried out at oil obtained to temperature extraction of 55 °C for being this the highest yield percentage. Avocado oil obtained can be classified as extra virgin, high in ω3, ω6 fatty acids and vitamin e corresponding to 759.29 mg/100 g, 12862.30 mg/100g and 10.11 mg/100 g respectively, which positions the avocado oil as a highly nutritious food and potentially functional what it means beneficial to health. [ABSTRACT FROM AUTHOR]

Copyright of Archivos Latinoamericanos de Nutrición is the property of Sociedad Latinoamericana de Nutricion and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Physiological and physico chemical characteristics of avocados (Persea americana Mill. Cv. "Hass") grown in the municipalities of Carmen de Viboral and El Retiro located in Antioquia (Colombia) are unknown, that is why the objective of this research was to characterize the properties for fruits from this regions, the avocados were stored for 21 days at 23°C and 65% RH. The physiological parameters evaluated were: the respiration rate and physiological weight loss, physicochemical characteristics were also evaluated as changes in color L*, a* and b*, firmness, yield pulp fruit, moisture content, dry matter, total soluble solids (TSS), Total titratable acidity, pH, and lipid content. It could be established that the respiration rate of avocado fruits is typical of monophasic climateric products, presenting a climacteric peak for the day 8 postharvest, this probably is the cause of the cascade of events characteristic of the ripening, with changes in the TSS, which were 2.45 for the postharvest day 14, the total acidity decreased between days 1 to 10 from 0.25 to 0.18%, and the firmness presented a continuous decrease from 67 Newton for day 1 to 7.7 for day 14 in postharvest, also it could be established a concentration of the lipid fraction of 24% and 22.5% for avocados harvested in the Carmen de Viboral and El Retiro. [ABSTRACT FROM AUTHOR]

Copyright of Revista de Investigaciones Veterinarias del Peru is the property of Universidad Nacional Mayor de San Marcos (UNMSM) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Agro Sur is the property of Universidad Austral de Chile, Facultad de Ciencias Agrarias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Liquid waste products from a dairy farm were characterized. Average total solids concentration amounted 6 676 mg/L; out of them, total solute solids constituted 64,53% with non-volatile solute solids prevailing in 60,68% while volatile solute solide accounted for 39,32%. On the other hand, total suspend solids (2 219 g/m³) constituted 33,57% with non-volatile suspended solids reaching 47,25% and volatile suspended solids, 52,75%. Organic matter content in liquid waste products was 44,6%. Residual water showed an average oxygen chemical demand of 48,25 g/m³ pointing out its highly pollutant power. Alkalinity was also high, amounting 1384 g/m³. Average total nitrogen was 316 g/m³, and total phosphorus was 27 g/m³ .Average pH was 8 rangin between 7,6 and 8,3. Except pH, all values for residual water spill are over the limit set by the Cuban Technical Standarts (27 in 1999); therefore, residual waters must be treated or surface water pollution can occur. It is evident that specific waste products characteristics must be determined to effectively assess their pollutant power as well as the methods that should be applied for their treatment. [ABSTRACT FROM AUTHOR]