Universitas Scientiarum最新文献_第4页

A highly diverse phytobenthic community along a short coastal reef gradient in northeastern Brazil 巴西东北部沿短海岸珊瑚礁梯度的高度多样化的底栖植物群落

Universitas Scientiarum Pub Date : 2022-05-13 DOI: 10.11144/javeriana.sc271.ahdp

S. C. César Ferreira

引用次数: 1

The utility of flow cytometry for the detection of tumor cells in cerebrospinal fluid of patients with acute leukemia 流式细胞术在急性白血病患者脑脊液肿瘤细胞检测中的应用

Universitas Scientiarum Pub Date : 2022-03-22 DOI: 10.11144/javeriana.sc271.tuof

Ximena Torres, I. de los Reyes, M. Vizcaíno, P. Guzmán, A. Campos, Niyireth Peñalosa, A. Uribe, C. Saavedra, M. Romero, G. Cuéllar, Liliana Martín, P. Rodríguez, C. Cardozo, Sandra Quijano

{"title":"The utility of flow cytometry for the detection of tumor cells in cerebrospinal fluid of patients with acute leukemia","authors":"Ximena Torres, I. de los Reyes, M. Vizcaíno, P. Guzmán, A. Campos, Niyireth Peñalosa, A. Uribe, C. Saavedra, M. Romero, G. Cuéllar, Liliana Martín, P. Rodríguez, C. Cardozo, Sandra Quijano","doi":"10.11144/javeriana.sc271.tuof","DOIUrl":"https://doi.org/10.11144/javeriana.sc271.tuof","url":null,"abstract":"Central nervous system infiltration by acute leukemia is a poor prognosis variable, and conventional cytology is the gold standard for its diagnosis; the technique is highly specific but not sensitive. To improve the diagnosis, flow cytometry has been used in different studies, showing greater sensitivity in the detection of leukemic cells. This study aimed to evaluate the presence of tumor cells by flowcytometry and conventional cytology, in cerebrospinal fluid from patients with acute leukemia as well as its relationship with clinical and biological parameters. In total, 156 CSF samples from 55 children with acute leukemia were studied. We found the following results: FCM-/CC- 131/156; FCM+/CC- 19/156; FCM-/CC+ 0; FCM+/CC+ 1/156; FC-/CC suspicious 1/156; and FCM+/CC suspicious 4/156. Patients with B-cell acute lymphoblastic leukemia and FCM+ showed a lower response to steroid-treatment, abnormal karyotype, neurological symptoms, and worse relapsefree survival. Patients with T-cell acute lymphoblastic leukemia and FCM+ demonstrated association with thrombocytopenia. In conclusion, flow cytometry has greater sensitivity for the detection of tumor infiltration in cerebrospinal fluid, a finding that correlates with prognostic parameters in patients with acute leukemia.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41951758","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: 0

Phytochemical study and antifungal activity of leaf and flower extracts of the Asteraceae species Chromolaena scabra (LF) R. King & H. Rob. 菊科植物色霉(Chromolaena scabra, LF)叶片和花提取物的植物化学研究及抗真菌活性

Universitas Scientiarum Pub Date : 2022-03-09 DOI: 10.11144/javeriana.sc271.psaa

Fabián Garzón-Posse, Jorge E. Parra-Amin, Diego Ricardo Muñoz-Cendales

引用次数: 0

Production of biogas and ethanol from stationery wastes using a microbial consortium isolated from soil as starter culture 利用从土壤中分离的微生物联合体作为发酵剂从文具废物中生产沼气和乙醇

Universitas Scientiarum Pub Date : 2021-11-22 DOI: 10.11144/javeriana.sc26-3.poba

S. Ananou, Zineb Bougarne, L. Manni, N. El Ghachtouli

{"title":"Production of biogas and ethanol from stationery wastes using a microbial consortium isolated from soil as starter culture","authors":"S. Ananou, Zineb Bougarne, L. Manni, N. El Ghachtouli","doi":"10.11144/javeriana.sc26-3.poba","DOIUrl":"https://doi.org/10.11144/javeriana.sc26-3.poba","url":null,"abstract":"The conventional pretreatments used during the valorization of paper waste in renewable energies are expensive, long, slow, require high temperatures and particularly not eco-friendly. However, the application of microbial cultures with cellulolytic capabilities becomes an attractive and low-cost strategy. Therefore, the aim of this study was to screen an efficient microbial culture and its evaluation as a starter culture during hydrolysis process of biogas and bioethanol production. Our results indicated that from 18 isolates, two bacteria (identified as Pseudomonas horyzihabitans and Serratia liquefaciens) and one consortium (CS2, predominated by Enterobacteriaceae) had an important cellulosic hydrolysis activity. The application of the selected consortium as a starter culture during the hydrolysis process of biogas and bioethanol production improved yields. Indeed, the application of CS2 enhanced the biogas and bioethanol yields to 9.4 mL g−1 and 78.2 μL g−1 (P < 0.05) respectively. Also, starter culture CS2 addition reduced the time needed for cellulosic hydrolysis to 21 days, respect to 24 days in control sample, during biogas production under psychrophilic temperature. Thus, this low cost and practical procedure can be used as an efficient strategy to release sugars from paper waste, to reduce the time needed for cellulosic biodigestion, and to enhance the biogas and bioethanol recovered.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44522950","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: 0

Biological activities of Annona montana Macfad extracts 番荔枝提取物的生物活性研究

Universitas Scientiarum Pub Date : 2021-10-10 DOI: 10.11144/javeriana.sc26-3.baoa

Ana Isabel Giraldo Rivera, G. Guerrero-Álvarez

{"title":"Biological activities of Annona montana Macfad extracts","authors":"Ana Isabel Giraldo Rivera, G. Guerrero-Álvarez","doi":"10.11144/javeriana.sc26-3.baoa","DOIUrl":"https://doi.org/10.11144/javeriana.sc26-3.baoa","url":null,"abstract":"Annona montana Macfad is a fruit species of the Annonaceae family. In this study, the phytochemical potential of A. montana seeds was investigated. Ethanol and hexane extracts from seeds were evaluated for cytotoxicity and insecticidal activity, phenolic content, and antioxidant capacity. The latter being related to free radical scavenging activity assay (DPPH) and ferric reducing power (FRAP). Exposing Artemia salina to both seed extract types reveled their high toxicity with a median lethal concentration (LC50) of < 10 μg mL-1. Further A. montana seed insecticidal activity was evaluated against Thrips tabaci L., revealing that the most promising treatments were observed for a concentration of 100 mg L-1 in both extracts. The ethanol extract resulted in a mortality of 67.5 % and the hexane extract in a 53.3 % mortality. The ethanolic extract of A. montana seeds showed the highest total phenolic content: 297.38 mg GAE/100 g of dried extract and 192.66 mg TE/100 g, and 385.46 mg TE/100 g for DPPH and FRAP, respectively. The chemical characterization of both extracts by high performance liquid chromatography (HPLC) revealed the presence of acetogenins. The results obtained idicate that the A. montana extracts are a promising source of compounds with insecticidal activity.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42314042","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: 0

Morphological characterization of dermal denticles of the Broadnose Sevengill Shark Notorynchus cepedianus (Elasmobranchii: Hexanchidae) 阔鼻七鳃鲨(鲨鳃目:鲨科)真皮小齿的形态学特征

Universitas Scientiarum Pub Date : 2021-10-09 DOI: 10.11144/javeriana.sc26-3.mcod

K. Kanagusuku, Pablo Dufflocq, Angie Sánchez-Rea, A. Huamantinco, Sergio Ramírez-Amaro

{"title":"Morphological characterization of dermal denticles of the Broadnose Sevengill Shark Notorynchus cepedianus (Elasmobranchii: Hexanchidae)","authors":"K. Kanagusuku, Pablo Dufflocq, Angie Sánchez-Rea, A. Huamantinco, Sergio Ramírez-Amaro","doi":"10.11144/javeriana.sc26-3.mcod","DOIUrl":"https://doi.org/10.11144/javeriana.sc26-3.mcod","url":null,"abstract":"Shark skin is covered by small structures called dermal denticles whose functions are diverse, such as protection, bioluminescence, hydrodynamics, among other functions. These structures have a great variety of shapes and sizes, which can be a useful approach for specimen identification as diagnostic characters between species. The present study aims to describe the dermal denticles morphology of the broadnose seven-gill shark Notorynchus cepedianus, evaluating differences among life-stage (neonate, juvenile and adult), sex and body region (dorsal and ventral). For achieving it, 39 specimens were collected at six landing points along the Peruvian coast. The dermal denticles from two body regions(dorsal and ventral) were photographed, measured (length, width, angle and density), and described using a stereoscope. Dermal denticles measures showed significant morphological differences between body regions as well as stages of development, but not between sexes. The differences are: (1) Crown shape: as the individual grows, it can be seen that the cross shape is losing, (2) Crown cusps: cusps length varied according to the stage of each individual, it was also observed that the lateral cusps are larger in dorsal than ventral region, and (3) Union peduncle - crown: adult specimens and both body regions, the observed union was very dimly and it did not have a defined shape. On the whole, these reported variations in measured traits could be useful as diagnostic characters to identify the stage of development at which the landed and marketed specimens are found.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46726103","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

Zooplankton distribution in Mesophotic Corals at Bajo Frijol seamount, Colombian Caribbean 哥伦比亚加勒比海Bajo Frijol海山中孔珊瑚的浮游动物分布

Universitas Scientiarum Pub Date : 2021-09-11 DOI: 10.11144/javeriana.sc26-3.zdia

Laura Contreras Vega, Alejandro Henao Castr, G. Navas S.

{"title":"Zooplankton distribution in Mesophotic Corals at Bajo Frijol seamount, Colombian Caribbean","authors":"Laura Contreras Vega, Alejandro Henao Castr, G. Navas S.","doi":"10.11144/javeriana.sc26-3.zdia","DOIUrl":"https://doi.org/10.11144/javeriana.sc26-3.zdia","url":null,"abstract":"Mesophotic coral ecosystems shelter unique communities, but have not been studied enough due to the high cost for the available technologies. The zooplankton have become the primary food resource of the polyps at these environments, due to the low photosynthesis rate of its zooxanthellae, . Therefore, the purpose of this work was to study the zooplankton community associated to the MCEs in Bajo Frijol, in the Corales de Profundidad National Natural Park, and compare its composition with the zooplankton community from shallower parts of the water column. Three samples were taken, filtering 24 L of seawater (45 µm mesh size) at each station with a device designed to collect zooplankton right on top of the reef substrate. The taxonomic composition, density and relative abundance were obtained. A resemblance analysis was performed, complemented with a cluster, an MDS and a modified Kandoorp test. The analysis showed clear differences between the water column samples from those taken close to the reef. It also showed the separation of the community at the seamount into two large groups: north and center-south, both with exclusive species.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45611470","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: 0

Coupling effects of structure, oxygen availability and temperature on microbial growth in a pastry filling 结构、氧可用性和温度对糕点馅料微生物生长的耦合效应

Universitas Scientiarum Pub Date : 2021-08-09 DOI: 10.11144/javeriana.sc26-2.ceos

A. Laca, M. Díaz, A. Laca, P. Mateos

引用次数: 0

Potential phenotypic plasticity within Simulium nigrimanum Macquart, 1838 (Diptera: Simuliidae) larvae 黑Simulium nigrimanum Macquart，1838（夜蛾目：Simuliidae）幼虫的潜在表型可塑性

Universitas Scientiarum Pub Date : 2021-08-04 DOI: 10.11144/javeriana.sc26-2.pppw

Ronaldo Figueiró, A. Calvet, L. Gil-Azevedo, R. Monteiro, M. Maia-Herzog

{"title":"Potential phenotypic plasticity within Simulium nigrimanum Macquart, 1838 (Diptera: Simuliidae) larvae","authors":"Ronaldo Figueiró, A. Calvet, L. Gil-Azevedo, R. Monteiro, M. Maia-Herzog","doi":"10.11144/javeriana.sc26-2.pppw","DOIUrl":"https://doi.org/10.11144/javeriana.sc26-2.pppw","url":null,"abstract":"Black fly larvae (Diptera: Simuliidae) are suspension filter-feeders which strongly depend on water velocity for proper feeding. Black fly species feature different microhabitat preferences. Studies of Holarctic black fly larvae revealed their phenotypic plasticity in response to water current velocity variation, but such studies have been rarely undertaken with Neotropical black flies. The current work presents results on the phenotypic plasticity of the black fly species Simulium nigrimanum Macquart. Twelve last instar larvae, sampled from the Brazilian Cerrado, were photographed under a stereoscopic microscope and measured using the CMEIAS Image tool software. Linear regressions with water velocity as the independent variable were performed, indicating that while body size and anal disk diameter correlated positively with water velocity, labral fan length correlated negatively. The observed relationships between water velocity and labral fan length and anal disk diameter were consistent with the literature, while the pattern of body size variation partially corroborated previous studies. The present work results suggest that potential phenotypic plasticity can be observed in black fly larvae within one population distributed in different microhabitats of the same stream section, as opposed toprevious reports implying that such variation is only found among population from different streams.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42483768","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: 0

Diet of Dendropsophus molitor (Anura: Hylidae) in a High-Andean agricultural ecosystem, Colombia 哥伦比亚高安第斯农业生态系统中黄粉虫（Anura：Hylidae）的饮食

Universitas Scientiarum Pub Date : 2021-06-25 DOI: 10.11144/javeriana.sc26-1.dodm

Diego F. Higuera -Rojas, Juan E. Carvajal‑Cogollo

{"title":"Diet of Dendropsophus molitor (Anura: Hylidae) in a High-Andean agricultural ecosystem, Colombia","authors":"Diego F. Higuera -Rojas, Juan E. Carvajal‑Cogollo","doi":"10.11144/javeriana.sc26-1.dodm","DOIUrl":"https://doi.org/10.11144/javeriana.sc26-1.dodm","url":null,"abstract":"Dendropsophus molitor is a generalist frog that makes optimal use of resources offered by highly transformed Andean ecosystems. Despite being one of the most researched amphibian species in Colombia, aspects of its diet as an indication of its trophic niche have not yet been evaluated. For this reason, we evaluated the diet of D. molitor, with interpretations of dietary composition to address this dimension of the niche. We chose an Andean agricultural system and in it we selected four jagüeyes (water-filled ditches) and carried out samplings between July and November 2017. We collected 32 individual frogs, extracted their stomach contents and analyzed the composition, diversity, relative importance of the prey and the amplitude of the trophic niche. Additionally, from a network analysis, we evaluated the interactions of the species with its prey. We obtained records of 69 prey, distributed in 29 categories; the prey with the highest frequency were Bibionidae1 with seven individuals, followed by Tipulidae1 and Tipulidae2 with six, which are equivalent to those of greater relative importance. The trophic niche was characterized as wide (Levins’ B = 0.7) and the interactions had a connectivity of 0.065, a link coefficient of 0.930 and a link density of 273.8, represented by a wide range of interactions with prey. The characterization of the diet and the trophic niche of D. molitor shows the broad use of resources consistent with its already documented generalist condition. The diversity of the diet together with the breadth could represent advantages for establishing large and healthy populations in transformed environments in the high mountains of the Andes.","PeriodicalId":39200,"journal":{"name":"Universitas Scientiarum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45457246","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