bluuebunny/crossref_metadata_2025_split huggingface dataset:
El reciclaje de vidrio y sus beneficios en el medio ambiente.
Authors: Carrasco R. Tatiana 
Published: June 2019

El reciclaje es la mejor forma para ayudar al medio ambiente, el hombre se ha convertido en el causante de contaminar día a día el medio en que vivimos, sin darnos cuenta hemos venido matando nuestra naturaleza cada vez más ,ya es hora que tomemos un poco de conciencia y ayudar en algo para recobrar su ambiente, es por ello que esta investigación se hablara sobre el reciclaje del vidrio y como su reusó ayudara al medio ambiente y disminuir un poco la contaminación que se da con el desecho del vidrio ,el reciclaje del vidrio es uno de los más gratificante ya que se puede reciclar al 100% sin desperdiciar nada, incluso existen envases de vidrio que con solo una buena limpieza queda como nuevo y permite volverlo utilizar ya sea en su misma función para la que fue elaborada o en otra que se estime conveniente. El reciclaje del vidrio beneficia tanto al ser humano como al medio ambiente, al ser humano le permite por medio del reciclaje obtener incluso hasta ingresos económicos y al medio ambiente ayudamos a no contaminarlo más, para poder crear conciencia en el ser humano es muy importante hablar del medio que sus y como aporta a la vida del ser humano es por ello que en la investigación se trataran puntos muy importantes sobre lo que es el reciclaje, medio ambiente y el vidrio, además se tratara de hacer ver el aporte que esta da a la naturaleza ,principalmente, el reciclaje de vidrio. Según las estadísticas encontradas Europa es el continente que más recicla en el mundo, España se ha convertido en el país con la tasa de reciclaje más alta, en América Latina el reciclaje aun no es un tema de éxito y mucho menos en nuestro país.
Plataformas virtuales y su impacto en la Educación Superior.
Authors: Velasteguí Pablo 
Published: June 2019

La educación en la actualidad es la encargada de no solo transmitir conocimientos e información, sino que debe proporcionar los medios, aptitudes y habilidades para producirlos y utilizarlos en la práctica pedagógica, creando nuevos escenarios donde desarrollan el proceso educativo.
Una de las vías fundamentales para el desarrollo de tales propósitos es la utilización de las Aulas Virtuales, como apoyo al docente permiten elevar el desempeño y el trabajo colaborativo, a través de la interactividad y la comunicación entre el docente y el estudiante, aprovechando las facilidades que brindan los productos multimedia para la presentación de contenidos.
Las aulas virtuales como espacio educativo se han convertido en un medio muy utilizado en las universidades, a través de ellas los docentes y estudiantes participan en un proceso de enseñanza aprendizaje mediante el empleo efectivo de las computadoras para acceder, comunicar, compartir y crear conocimientos que conducen al aprendizaje.
La adecuación de tales prácticas tecnológicas en el ámbito educativo promueve la creación de nuevos entornos didácticos que afectan de manera directa tanto a los actores del proceso de enseñanza – aprendizaje como al escenario donde se lleva a cabo el mismo.
Son un nuevo ámbito de aprendizaje, una poderosa herramienta de comunicación, información e interacción entre los docentes y los estudiantes, trascienden las barreras de espacio y tiempo, permiten una comunicación directa y atención personalizada inmediata o diferida entre docente y estudiantes, brindan una variedad de recursos que promueven el proceso de enseñanza – aprendizaje colaborativo y la construcción de nuevos conocimientos a través de ellas.
La educación virtual es una nueva forma viable de enseñanza que viene a suplir necesidades, precariedades propias de la educación presencial y del mal uso de la tecnología educativa.
El reciclaje de vidrio y su impacto en la conservación del medio ambiente.
Authors: Carrasco R. Tatiana 
Published: June 2019

Este documento tiene como tema principal el impacto ambiental de las botellas de vidrio, el impacto que este tiene actualmente es un tema bastante hablando y muy discutido, según los entendidos el vidrio no contamine al medio ambiente, como también existen otros autores que afirman que el vidrio y los envases de vidrio llegan a ser muy perjudiciales para la naturaleza ya que es un producto que resiste generaciones.
Las botellas de vidrio se las realizan con materia prima a muy altas temperaturas ese es el proceso que lleva la fabricación de las botellas, algunos investigadores dicen que las fabricaciones de estos dañan la atmosfera del planeta porque este produce demasiada energía.
Hoy en día existe muchas personas trabajando para la conservación y cuidado del medio ambiente ellos han optado por el reciclaje de los desechos inorgánicos, tales como tela, metal, cartón o papel, plástico, vidrio, aunque el reciclaje de vidrio es poco a nivel mundial, las grandes industrias prefieren fabricar que reutilizar el envase. El reciclaje de las botellas de vidrio es muy bueno porque si obtenemos 3.000 botellas se ahorra mucho de lo que consume la elaboración de este producto. Con las botellas de vidrio se pueden hacer infinidades de manualidades para el hogar y también para vender.
En Alemania utilizan el canjeo y el descuento en la compra de otro producto de vidrio así se llega al reciclaje de estos productos utilizando un mecanismo como de ingresos y descuento para el hogar en ecuador el reciclaje de vidrio es muy poco llegando a un porcentaje en reciclaje de 12,68% en el año 2014.
Molecular characterization and identification of three stored grain pests based on mitochondrial cytochrome C oxidase subunit I (COI) gene sequences
Authors: Md Aslam Abu Faiz , Sultana Sharmin , Rain Faria Farhana , Das Sumita Rani , Siddika Ayesha , Howlader Abdul Jabber 
Published: June 2019

Stored grain pests are discovered in food as immature stages, which further complicates the identification process. A DNA barcode dataset of some important pests that can be used for easy and confirm identification in stages of life is constructed. COI genes of three stored grain insect pests i.e,, Sitophilus oryzae, Callosobruchus chinensis and Oryzaephilus surinamensis were sequenced. The sequenced genes were submitted to NCBI GenBank and obtained accession numbers MG967331.1, MG967332.1, MG967333.1 and MK041216.1. BLAST analysis showed 99 to 100% homology with existing GenBank sequences. The nucleotide composition analysis revealed that the value of A+T (64.8%) is greater than G+C (35.2%). Genetic distance among four sequences of three store pests were ranged from 0.00293-0.32807. Phylogenetic analysis showed that these three species are originated from different clades. Haplotype analysis of mitochondrial COI gene of the stored grain insect pests showed high genetic diversity among them. C. chinensis, O. surinamensis and S. oryzae were separated from their common ancestor by 80, 73 and 64 mutational steps. These information may be helpful for attempting any successful control measures against the pest species. In conclusion, present author established the first DNA barcode dataset of three store grain pests and confirmed its efficiency for identifying these pests.
Bangladesh J. Zool. 47(1): 1-11, 2019
Molecular phylogeny of common sun skink, Eutropis (Squamata: Scincidae), of northwestern part of Bangladesh
Authors: Hossain Mosharrof , Jing Che 
Published: June 2019

A study on the phylogenetic relationship of Bangladeshi Skink confirmed species as Eutropis multifasciata by Bayesian inference (BI) (100%) and 98% node support to maximum likelihood (ML) tree topology, respectively. The sequence divergences between Eutropis multifasciata and other congeneric species were significant, ranging from 0.1 to 13.6% for 16S rRNA. Intraspecific genetic divergence within E. multifasciata was estimated 10.3%. E. multifasciata formed a distinct clade with high posterior probability support. This maiden study on Bangladeshi Skink results support that one monophyletic subgroup containing all specimens of E. multifasciata and all recently recognized E. multifasciata populations have evolved from one common ancestor.
Bangladesh J. Zool. 47(1): 13-25, 2019
Biochemical analysis of different nutritional components of Clarias batrachus (Linnaeus) and Clarias gariepinus (Burchell) in relation to parasitic infestation
Authors: Yesmin Sabina , Khanum Hamida 
Published: June 2019

Two catfish: Clarias batrachus (Linnaeus) and C. gariepinus (Burchell) were selected for examination during June, 2014 to May, 2016. The percentage (g/100 g) of nutrients such as moisture, ash, fat, protein, carbohydrate contents (mg/100 g) and energy (K cal) in C. batrachus and C. gariepinus was determined. Analyses were done to measure the nutrition value of edible body parts (flesh) of C. batrachus and C. gariepinus. The effects of modifying factors such as, season, sex, length, and diet of the hosts on the abundance of parasites were also studied. Present observation on biochemical analysis showed small variation in nutrient contents between C. batrachus and C. gariepinus. Protein, fat, moisture, carbohydrate levels were higher in non-infected C. batrachus (moisture 78.25 ± 0.06 g/100 g, ash 1.42 ± 0.09 g/100 g, fat 1.20 ± 0.04 g/100 g, protein15.05 ± 0.19 g/100 g, carbohydrate 5.53%) and non-infected C. gariepinus (moisture 78.62 ± 0.01 g/100 g, ash 1.22 ± 0.10 g/100 g, fat 1.19 ± 0.03 g/100 g, protein 14.69 ± 0.07 g/100 g, carbohydrate 4.95% than those of infected C. batrachus and C. gariepinus. In both species the highest presence of most of the nutrient components was observed in winter.
Bangladesh J. Zool. 47(1): 27-39, 2019
Temperature and host dependent functional response of Anisopteromalus calandrae (How.) and Choetospila elegans (Westw.) parasitods in parasitizing wheat infesting Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae)
Authors: Rahman MM , Islam W 
Published: June 2019

Rhizopertha dominica (F.) (Coleoptera: Bostrichidae) is an internal feeder of whole wheat seed, flour, etc. R. dominica is parasitized by two pteromalid ectoparasitoids, Anisoptetromalus calandrae (How.) and Choetospila elegans (Westw.) in the larval and pupal stages. The effects of host density and temperature on the functional response of the parasitoids in parasitizing the larval and pupal stages of the hosts were examined. Four temperatures and five host densities were used. A functional response equation was used in which a quadratic component that included temperature was substituted for handling time. Functional response of parasitization by A. calandrae and C. elegans fit a formula of Hassell et al. (1977) type III model. The maximum rate of parasitization of A. calandrae was 8.6 larvae/24 hrs and 7.2 larvae/24 hrs of C. elegans at 30ºC, respectively. Handling time and instantaneous search rate varied with temperatures. The ability of A. calandrae and C. elegans to find and parasitize R. dominica over a broad range of temperatures demonstrate it as a good candidate for natural control of the pest.
Bangladesh J. Zool. 47(1): 41-47, 2019
Polymorphic loci analysis of 16s ribosomal RNA gene of economically important marine lizardfish Bombay duck (Harpadon nehereus)
Authors: Saha Sristy , Ferdous Zannatul , Jahan Hawa , Khandaker Ashfaqul Muid , Md Shahjahan Reza , Begum Rowshan Ara 
Published: June 2019

Attempts were made to combine morphological and molecular techniques for identification and analysis of evolutionary relationship of commercially important marine lizardfish (Bombay duck) from the Bay of Bengal. For molecular identification, mitochondrial DNA (mtDNA) was extracted using CTAB extraction protocol and 16S rRNA gene was amplified by PCR method. Morphological identification was supported by molecular data generated by 99% identity of BLAST search result of Harpadon nehereus. The nucleotide sequence of H. nehereus was 586 bp long and the G+C content was 51% and intraspecies polymorphic sites were 0.5%. According to interspecies polymorphic sites analysis, 4.9% polymorphism was observed when H. nehereus and H. microchir were compared. Phylogenetic tree was constructed and both the Harpadon spp. formed a monophyletic clade. This analysis will be used to study molecular diversity as well as conservation of this fish species.
Bangladesh J. Zool. 47(1): 49-57, 2019
Oviposition deterrent and ovicidal activity of three edible oils (black seed, sesame and soybean oils) against puls beetle, Callosobruchus chinensis (Lin.) (Coleoptera: Bruchidae) on green gram, Vigna radiata
Authors: Akter Sharmin , Sultana Shanjida , Akter Tangin , Begum Shefali 
Published: June 2019

The effectiveness of three different edible oils - black seed (Nigella sativa), sesame (Sesamum indicum) and soybean (Glycene max) was evaluated for the control of pulse beetle, Callosobruchus chinensis on green mung pulse, Vigna radiata. The oviposition deterrent and ovicidal activity of these three oils were compared between fresh mung pulses and pulses treated at different doses (1, 3 and 6 μl). The results indicated that the rate of oviposition and the mean number of emerged adults of C. chinensis on mung pulses treated with black seed, sesame and soybean oil were lower than their respective control pulses. The lowest number of eggs were recorded in soybean oil treated seeds (13.8 ± 1.07, 12.6 ± 1.36, 10.0 ± 1.82) followed by sesame (51.8 ± 4.63, 25.8 ± 8.52, 14.2 ± 4.50) and black seed oil (67.2 ± 9.71, 27.4 ± 5.52, 21.0 ± 5.54) at dose 1 μl, 3 μl and 6 μl, respectively in order. Soybean oil at the rate of 6μl/50 seeds was significantly effective (10.0 ± 1.82) to inhibit egg deposition. In case of ovicidal activity, minimum number of adults were emerged from black seed oil treated pulses (25.2 ± 2.73, 24.2 ± 0.58, 22.4 ± 1.17 at dose 1, 3 and 6 μl, respectively). Black seed oil at the rate of 6μl/ 50 seeds was the most effective (22.4 ± 1.17) than other edible oils.
Bangladesh J. Zool. 47(1): 59-65, 2019
Occurrence of intestinal parasites among school going children of a slum area in Dhaka city
Authors: Hossain Md Rahat , Musa Sharmin , Zaman Rimi Farhana , Khanum Hamida 
Published: June 2019

A cross sectional study was carried out among school going children of Ganaktuli slum area in Dhaka city, Bangladesh. A total of 183 stool samples were collected from children of age between 5 and 16 years of both sexes during May, 2017 to April, 2018. Collected samples were examined using Formal-Ether Concentration technique. 61.20% samples were found positive for intestinal parasites. Eight species of parasites were identified, where Entamoeba histolytica (3.83%), Giardia lamblia (6.01%), Diphyllobothrium latum (3.28%), Paragonimus westermani (3.83%), Ascaris lumbricoides (24.59%), Trichuris trichiura (12.02%), Ancylostoma duodenale (5.46%) and Enterobius vermicularis (2.19%) was recorded. Male children showed higher (63.95%) prevalence than female (58.76%). The highest and lowest prevalence (82.46 and 39.29%) were found among 8 - 10 and 14 - 16 years children, respectively. The highest prevalence of E. histolytica (7.02%), A. lumbricoides (38.60%), T. trichiura (14.04%) and A. duodenale (8.77%) were observed in 8 - 10 years age group; G. lamblia (7.41%), P. westermani (5.56%) and E. vermicularis (3.70%) in 11 - 13 years age group and D. latum (6.90%) was found highest in 14 - 16 years age group. Statistically it was observed that age groups had significant association with parasitic infestation (p < 0.05) but prevalence did not alter significantly according to sexes (p > 0.05). Highest abundance of parasites was recorded for A. lumbricoides.
Bangladesh J. Zool. 47(1): 67-75, 2019
Growth performances and bioaccumulation of heavy metals in Anabas testudineus (Bloch, 1792) cultured using different market feeds
Authors: Fatema Kaniz , Sakib Md Nazmus , Zahid Md Al , Sultana Nahid , Hassan Md Rakibul 
Published: June 2019

The study was conducted to determine growth performances and bioaccumulation of Cr, Cu, Cd, Pb and Ni in fish organs such as intestines, muscle and gills of study species after culturing them for twelve weeks by using different commercial fish feeds. The highest average daily gain (ADG, g/day) and specific growth rate (SGR; %/day) were found in fish fed quality feed and lowest values were found in the fish fed mega feed. Best feed conversion ratio (FCR) value was found in fish fed quality feed among five different feeds. In cultured Koi, the concentration of heavy metals were found higher than initial concentration in fish feeds and collected fingerling samples. Heavy metal levels in cultured fish was Cu > Pb > Cr > Cd > Ni and levels of bioaccumulation in individual organs was intestines > gills > muscle. The concentration of Cu, Pb and Cr exceed the tolerable limit approved by FAO in fishes cultured with the experimental feeds. Considering the present study, Koi cultured with these experimental feeds may not safe for human consumption.
Bangladesh J. Zool. 47(1): 77-88, 2019
The abundance and mechanical control of Icerya purchasi (Maskell, 1878) (Hemiptera: Monophlebidae) on Mangifera indica in Dhaka, Bangladesh
Authors: Nowrin Samiha , Begum Murshida , Khatun Mousumi , Howlader Moksed Ali 
Published: June 2019

The cottony cushion scale, Icerya purchasi, one of the devastating pests of citrus and ornamentals distributed all over the world. A study was conducted on the biology, abundance and mechanical control of this pest on mango plants from at two locations of Dhaka, Bangladesh. Simple linear regression lines were produced on the lengths and widths of different nymphal instars and adult of this pest. It was proved that body lengths and widths were highly correlated with the successive changing of the nymphal instars from 1st, 2nd and 3rd to adults. The maximum abundance of the I. purchasi on mango leaves was 310 ± 21 in March, 2016. The results of the mechanical control method by hand crushing showed that it was highly effective to control this insect. Abundances of this insect before and after treatment were significantly different (p < 0.05). Abundances of insects in different sampling times were showed different by Tukey’s HSD test (p < 0.05).
Bangladesh J. Zool. 47(1): 89-96, 2019
Seasonal abundance of major sucking and chewing insects of guava
Authors: Amin Md Ruhul , Khisa Shubhati , Rahman Habibur , Jannat Rayhanur , Badruzzaman Muhammad 
Published: June 2019

Seasonal abundances of the sucking insects, namely mealy bug, white fly and scale insects, and chewing insect viz., fruit fly was monitored during September, 2016 to June, 2017 in a guava Psidium guajava orchard. Sucking insect was monitored by weekly observation on the leaves and chewing insect was captured using methyl eugenol trap. The mealy bug, white fly and scale insects were abundant during 4th week of November to 4th week of January and they showed fluctuations in their population. The mealy bug, white fly and scale insects had peak abundance in the 1st week of January, 4th week of November and 1st week of December, respectively. The scale insect revealed significantly higher abundance compared to other sucking insects. Two species of fruit fly, namely Bactrocera tryoni and B. dorsalis were found in the guava orchard and B. tryoni showed significantly higher abundance compared to B. dorsalis both in winter and summer seasons. In winter, B. tryoni reached the peak abundance in the 2nd week of January and their peak abundance in summer occurred in the 1st week of May. The daily mean temperature and relative humidity influenced the abundance of the sucking and chewing insects. Temperature individually contributed 30.0, 59.6, 59.3% abundance and temperature with relative humidity had 34.8, 60.9 and 73.5% abundance on mealy bug, white fly and scale insect, respectively. The effect of temperature on the abundance of fruit fly in winter and summer were 42.6 and 50.3%, respectively and the combined effect of temperature with relative humidity were 68.7% in winter and 61.9% in summer.
Bangladesh J. Zool. 47(1): 97-105, 2019
Water quality, growth and production performance of stinging catfish, Heteropneustes fossilis (Bloch) in cemented tanks with two different stocking densities
Authors: Roy Dulon , Masud Abdullah Al , Saha Pritam Kumar , Kutubuddin MM , Islam Md Muzahidul 
Published: June 2019

Attempt has been taken to develop intensive tank culture technique providing natural environment for Stinging catfish (Heteropneustes fossilis) inside tank to increase survival rate as well as production. The experiment was conducted for a period of 150 days in two tanks (T1 and T2) of 300 m2. Fish fries with a mean weight and length ranged from 1.02 to 2.2 g and 2.7 to 3.5 cm were stocked in T1 and T2, respectively. Stocking density of fingerlings were 1, 25,000 and 1, 50,000 per Ha in T1 and T2, respectively. Commercial pelleted feed was supplied to tank reared fish twice daily at a rate of 3-10% of body weight per day and later feeding rate was adjusted based on body weight by sampling. Important water quality parameters (temperature, DO, pH, transparency, ammonia and nitrate) were recorded weekly throughout the culture period. Survival rate was 87% and 84% in T1 and T2, respectively. Mean final weight were 41.73 ± 2.09g and 40.6 ± 0.90 g in T1 and T2, respectively. Length-weight relationship indicates that the growth rate was always higher in T1 followed by T2. Results showed that net yield was relatively higher in T2 (5115.35 ± 113.13 Kg/ha) than T1 (4537.12 ± 227.4 Kg/ha). In case of production, there was significant difference (p < 0.05) between two treatments. This experiment demonstrated the potential of H. fossilis production through new technique of tank culture system. However, more research is needed using local feed ingredients with higher stocking density.
Bangladesh J. Zool. 47(1): 107-119, 2019
Parasite diversity in mallard: A cross sectional study on Anas platyrhynchos from Munshiganj, Dhaka
Authors: Begum Aleya , Mukutmoni Mandira , Akter Farjana 
Published: June 2019

Among the 60 Anas platyrhynchos domesticus (32 males and 38 females), all the mallards were infested with Anaticola cassicornis and Lipeurus caponis. A. cassicornis displayed the peak intensity (15.5 ± 3.64) in female ducks. The lowest prevalence was of Colpocephalum turbinatum (25%) and found in male but the intensity was high (15 ± 2.23). Among the endoparasites, the highest prevalence was of Ascaridia galli (85.71%) found in female ducks and the lowest was in Echinostoma trivolvus (12.5%) found in male. The peak intensity was of Sobolevicanthus sp. (17.8 ± 2.34) in female following Echinostoma revolutum (17.33 ± 0.97). Ectoparasites were seen to infest all the seasons. But endoparasites were more prevalent in summer than the autumn and winter.
Bangladesh J. Zool. 47(1): 121-128, 2019