Universitas Scientiarum最新文献_第8页

Effectiveness of vertical subsurface wetlands for iron and manganese removal from wastewater in drinking water treatment plants 垂直潜流湿地对饮用水处理厂废水中铁和锰的去除效果

Universitas Scientiarum Pub Date : 2019-05-06 DOI: 10.11144/JAVERIANA.SC24-1.EOVS

Jader Martínez Girón, Jenny Vanessa Marín-Rivera, M. Quintero-Angel

{"title":"Effectiveness of vertical subsurface wetlands for iron and manganese removal from wastewater in drinking water treatment plants","authors":"Jader Martínez Girón, Jenny Vanessa Marín-Rivera, M. Quintero-Angel","doi":"10.11144/JAVERIANA.SC24-1.EOVS","DOIUrl":"https://doi.org/10.11144/JAVERIANA.SC24-1.EOVS","url":null,"abstract":"Population growth and urbanization pose a greater pressure for the treatment of drinking water. Additionally, different treatment units, such as decanters and filters, accumulate high concentrations of iron (Fe) and manganese (Mn), which in many cases can be discharged into the environment without any treatment when maintenance is performed. Therefore, this paper evaluates the effectiveness of vertical subsurface wetlands for Fe and Mn removal from wastewater in drinking water treatment plants, taking a pilot scale wetland with an ascending gravel bed with two types of plants: C. esculenta and P. australis in El Hormiguero (Cali, Colombia), as an example. The pilot system had three upstream vertical wetlands, two of them planted and the third one without a plant used as a control. The wetlands were arranged in parallel and each formed by three gravel beds of different diameter. The results showed no significant difference for the percentage of removal in the three wetlands for turbidity (98 %), Fe (90 %), dissolved Fe (97 %) and Mn (98 %). The dissolved oxygen presented a significant difference between the planted wetlands and the control. C. esculenta had the highest concentration of Fe in the root with (103.5 ± 20.8) µg/g ; while P. australis had the highest average of Fe concentrations in leaves and stem with (45.7 ± 24) µg/g and (41.4 ± 9.1) µg/g, respectively. It is concluded that subsurface wetlands can be an interesting alternative for wastewater treatment in the maintenance of drinking water treatment plants. However, more research is needed for the use of vegetation or some technologies for the removal or reduction of the pollutant load in wetlands, since each drinking water treatment plant will require a treatment system for wastewater, which in turn requires a wastewater treatment system as well.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11144/JAVERIANA.SC24-1.EOVS","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49638740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Conductimetry: a rapid alternative technique for chlorides determination in cheese 电导法:快速测定干酪中氯化物的替代技术

Universitas Scientiarum Pub Date : 2019-04-22 DOI: 10.11144/JAVERIANA.SC24-2.CARA

Jessica Aguirre-Londoño, Víctor Alexander Aristizabal-Ferreira, S. Castro-Narváez, J. S. Ramírez-Navas

{"title":"Conductimetry: a rapid alternative technique for chlorides determination in cheese","authors":"Jessica Aguirre-Londoño, Víctor Alexander Aristizabal-Ferreira, S. Castro-Narváez, J. S. Ramírez-Navas","doi":"10.11144/JAVERIANA.SC24-2.CARA","DOIUrl":"https://doi.org/10.11144/JAVERIANA.SC24-2.CARA","url":null,"abstract":"The correlation of two instrumental techniques for chlorides determination in Colombian cheese, Queso Molido Nariñense (a type of white cheese), was analyzed. Potentiometry of chloride precipitation is the standard technique to determined salt in cheese. Conductimetry is an alternative technique. Samples of Queso Molido Nariñense were made. In the processed cheeses the salt concentration (NaCl: 0.5 %, 0.8 %, 1.0 %, 2.0 %, 3.0% and 6.0 %) was varied. Chlorides were determined by titration with silver nitrate in the potentiometric technique. In the conductimetric technique, each sample was analyzed by direct measuring its conductivity at room temperature. It was found that there is an adequate correlation between potentiometry and conductimetry. A maximum concentration of 2% NaCl in cheese is equivalent to 2.9 S/cm for conductivity readings. Additionally, it was verified that the conductimetry constitutes an analytically reliable technique for the determination of chlorides in cheese, it is friendlier to the environment, cheaper and faster.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11144/JAVERIANA.SC24-2.CARA","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43055094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A Runs Test for the Hypothesis of Symmetry with one Sided Alternative 单侧可选对称假设的运行检验

Universitas Scientiarum Pub Date : 2019-04-22 DOI: 10.11144/JAVERIANA.SC24-2.ARTF

Jimmy Antonio Corzo_Salamanca, Myrian Elena Vergara_Morales, Jose Giovany Babativa-Márquez

引用次数: 0

Influence of indentation test factors on the mechanical response of the skin 压痕试验因素对皮肤力学响应的影响

Universitas Scientiarum Pub Date : 2019-04-09 DOI: 10.11144/JAVERIANA.SC24-1.IOIT

J. Isaza, D. Lacroix, J. Ramírez

{"title":"Influence of indentation test factors on the mechanical response of the skin","authors":"J. Isaza, D. Lacroix, J. Ramírez","doi":"10.11144/JAVERIANA.SC24-1.IOIT","DOIUrl":"https://doi.org/10.11144/JAVERIANA.SC24-1.IOIT","url":null,"abstract":"This study proposes in vivo tests and design of experiments to determine the influence of experimental factors on the mechanical response of the soft tissue. The experimental factors considered are: room temperature (A), indentation velocity (B), indenter temperature (C), pump pressure (D) and muscle activation (E). An inverse method was developed to obtain the constants for constitutive equations of a multilayer biological model (skin, hypodermis, and muscle) through the use of indentation tests in combination with a finite element method. For each combination of the experimental factors, two groups of constants were established from the inverse method. Sixteen combinations of experimental conditions and their corresponding constants for the Mooney-Rivlin constitutive equations were obtained to be used in further numerical models. The factor D and factor interactions ADE, CDE, and ACDE were statistically significant with respect to skin mechanical response. Therefore, it can be concluded that there is not a current equation able to represent the mechanical properties of the skin under all the experimental conditions considered in this study.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11144/JAVERIANA.SC24-1.IOIT","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41767679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Assessment of a multiplex detection method for Salmonella enterica, Escherichia coli O157:H7, and Listeria monocytogenes in cow milk 牛奶中肠沙门氏菌、大肠杆菌O157:H7和单核增生李斯特菌复合检测方法的评价

Universitas Scientiarum Pub Date : 2019-04-08 DOI: 10.11144/JAVERIANA.SC24-1.AOAM

R. E. Patiño-Burbano, A. Carrascal, Jorge L. Parra-Arango, J. L. Rodríguez-Bautista

{"title":"Assessment of a multiplex detection method for Salmonella enterica, Escherichia coli O157:H7, and Listeria monocytogenes in cow milk","authors":"R. E. Patiño-Burbano, A. Carrascal, Jorge L. Parra-Arango, J. L. Rodríguez-Bautista","doi":"10.11144/JAVERIANA.SC24-1.AOAM","DOIUrl":"https://doi.org/10.11144/JAVERIANA.SC24-1.AOAM","url":null,"abstract":"Raw cow milk is considered one of the most important vehicles for pathogenic bacteria like Salmonella spp., Escherichia coli O157:H7, and Listeria monocytogenes. These three bacteria are responsible for foodborne diseases. Routine microbiological methods to detect these microorganisms in cow milk can be complicated and time consuming. The aim of this work was to evaluate a method to simultaneously detect Salmonella spp., Escherichia coli O157:H7, and Listeria monocytogenes in experimentally contaminated cow milk. The assessed method combined a standard microbiological culture step, using a pre-enrichment medium that favors the growth of the three focal microorganisms: SEL broth, followed by a single PCR assay. A total of 43 interference bacterial strains were used to evaluate the method’s specificity. The detection rate for the microbiological method with standard culture media was 10 UFC/mL, and that of the PCR detection, following pre-enrichment in SEL broth, was 10 UFC/mL for S. enterica and L. monocytogenes and between 1 and 5 UFC/mL for E. coli O157:H7. The PCR method showed specificity for the reference strains. Simultaneous detection by multiple PCR using SEL broth was successful for the detection of S. enterica, E. coli O157:H7, and L. monocytogenes in samples of experimentally contaminated cow milk, featuring both a high detection rate and a high specificity. This approach promises to be a feasible routine procedure when testing milk samples in industry and public health control setups.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11144/JAVERIANA.SC24-1.AOAM","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43154428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Virus-induced gene silencing (VIGS) in cape gooseberry (Physalis peruviana L., Solanaceae) 猕猴桃(Physalis peruviana L.，茄科)病毒诱导的基因沉默(VIGS)

Universitas Scientiarum Pub Date : 2019-04-02 DOI: 10.11144/JAVERIANA.SC24-1.VIGS

J. A. Osorio-Guarín, Francy L. García-Arias, R. Yockteng

{"title":"Virus-induced gene silencing (VIGS) in cape gooseberry (Physalis peruviana L., Solanaceae)","authors":"J. A. Osorio-Guarín, Francy L. García-Arias, R. Yockteng","doi":"10.11144/JAVERIANA.SC24-1.VIGS","DOIUrl":"https://doi.org/10.11144/JAVERIANA.SC24-1.VIGS","url":null,"abstract":"Cape gooseberry (Physalis peruviana, L.) is a herbaceous plant belonging to the Solanaceae family that produces an edible berry appreciated for its nutraceutical and pharmaceutical properties. Its production is often limited by diseases and reproducible fruit quality. Recent studies have reported genes associated with fruit quality and resistance response to the root-infecting fungus Fusarium oxysporum f. sp. physali (Foph,) which causes vascular wilt. In order to standardize a method to validate the biological function of candidate genes in the non-model species P. peruviana, we tested the robust approach in reverse genetics, virus induced gene silencing (VIGS). In this study, we validated and optimized VIGS using an insert of the phytoenedesaturase (PDS) gene in a silencing viral vector generated from tobacco rattlevirus (TRV). Leaves infiltrated with Agrobacterium (GV3101 strain) showed photo-bleached segments, which were distinctive for PDS suppression at 7 days post-infection (dpi). More than half of the treated plants showed photo bleaching, indicating an efficiency rate of 50 % of the VIGS protocol. The results of this study showed that VIGS can be used for future functional gene characterization implicated in the immune response, disease resistance and fruit quality in capegooseberry.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11144/JAVERIANA.SC24-1.VIGS","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43231955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Reducing Cr6+ in electroplating wastewater with Bacillus cereus strain B1 蜡样芽孢杆菌B1菌株还原电镀废水中的Cr6+

Universitas Scientiarum Pub Date : 2019-03-27 DOI: 10.11144/JAVERIANA.SC24-1.RCIE

Jennifer Andrea Moreno-Benavides, E. Peña-Salamanca, Neyla Benítez-Campo

{"title":"Reducing Cr6+ in electroplating wastewater with Bacillus cereus strain B1","authors":"Jennifer Andrea Moreno-Benavides, E. Peña-Salamanca, Neyla Benítez-Campo","doi":"10.11144/JAVERIANA.SC24-1.RCIE","DOIUrl":"https://doi.org/10.11144/JAVERIANA.SC24-1.RCIE","url":null,"abstract":"In this study Bacillus cereus was used to evaluate the Cr6+ reducing capacity in electroplating effluents. TheCr6+ bioreduction assays were carried out using real waste water (RWW) from an electroplating plant and artificial wastewater (AWW), with and without added glucose. The AWW was prepared using Ni ,Zn ,Cu, Pb, and Cr salts, simulating RWW concentrations. The Cr6+ concentration and bacterial growth were monitored three times a day for the duration of five days. Also, were evaluated the effects of wastewater on B. cereus B1 morphology using scanning electron microscopy. Cr6+ reduction percentage of 100 % was reached for AWW containing glucose, of 71 % for AWW without glucose, of 75.6 % for RWW with glucose, and of 31.7 % for RWW without glucose. Despite the low reduction percentage obtained for RWW without glucose, concentrations of 0.14 mg/L of Cr6+ were reached, which were within allowed limits (0.5mg/L of Cr6+). Electron Microscopy showed alterations in the bacterial cell wall and a decrease in size, mainly in the bacteria exposed to RWW. The results allow us to propose B. cereus B1 as a promising microorganism for use in the bioremediation of effluents containing Cr6+.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11144/JAVERIANA.SC24-1.RCIE","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46652666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Checklist of marine elasmobranchs of Colombia 哥伦比亚海洋蓝鳃亚目清单

Universitas Scientiarum Pub Date : 2019-03-27 DOI: 10.11144/JAVERIANA.SC24-1.COME

A. Navia, P. Mejía-Falla

{"title":"Checklist of marine elasmobranchs of Colombia","authors":"A. Navia, P. Mejía-Falla","doi":"10.11144/JAVERIANA.SC24-1.COME","DOIUrl":"https://doi.org/10.11144/JAVERIANA.SC24-1.COME","url":null,"abstract":"A review and update to the shark and ray species recorded for the marine waters of Colombia was carried out. A total of 206 species had been recorded in the literature, of which 138 species (76 sharks and 62 rays) could be confirmed from museum records, catches, photographs, and videos. No evidence was found for 25 species, but their distribution included neighboring countries, and they were therefore classified as possible based on distribution. Thirty-six species were classified as improbable based on distribution and seven more were considered as misidentifications. The inventory of confirmed species includes 57 genera (30 shark and 27 batoid genera) and 34 families (18 shark and 16 batoid families). There was notably an addition of 26 confirmed species since 2007 as well as numerous modifications to group systematics and taxonomy, especially for batoids. The total number of confirmed elasmobranchs represented 12.1 % of species known worldwide, and could even reach 14.5 %, indicating that Colombia has one of the richest cartilaginous fish faunas in Latin America, behind Mexico and Brazil. This demonstrates that although Colombia cannot be considered an elasmobranch biodiversity hotspot or site of elasmobranch endemism globally, it does have good representativity of these species´ biodiversity at the regional level, especially regarding amphi-American species.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11144/JAVERIANA.SC24-1.COME","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41357605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Assessing salt-stress tolerance in barley 大麦耐盐性评价

Universitas Scientiarum Pub Date : 2019-03-06 DOI: 10.11144/JAVERIANA.SC24-1.ASST

Rajeswari Somasundaram, Neeru Sood, G. Swarup, R. Subramanian

引用次数: 7

Nutrient Absorption in Tithonia Diversifolia 山雀对养分的吸收

Universitas Scientiarum Pub Date : 2019-02-13 DOI: 10.11144//JAVERIANA.SC24-1.NAIT

J. M. Botero-Londoño, A. Gómez-Carabalí, M. A. Botero-Londoño

引用次数: 2