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  • 1
    Online Resource
    Online Resource
    Bifunctional Gas Diffusion Electrode Enables In Situ Separation and Conversion of CO 2 to Ethylene from Dilute Stream
    Wiley ; 2023
    In:  Advanced Materials Vol. 35, No. 24 ( 2023-06)
    Details
    In: Advanced Materials, Wiley, Vol. 35, No. 24 ( 2023-06)
    Abstract: The requirement of concentrated carbon dioxide (CO 2 ) feedstock significantly limits the economic feasibility of electrochemical CO 2 reduction (eCO 2 R) which often involves multiple intermediate processes, including CO 2 capture, energy‐intensive regeneration, compression, and transportation. Herein, a bifunctional gas diffusion electrode (BGDE) for separation and eCO 2 R from a low‐concentration CO 2 stream is reported. The BGDE is demonstrated for the selective production of ethylene (C 2 H 4 ) by combining high‐density‐polyethylene‐derived porous carbon (HPC) as a physisorbent with polycrystalline copper as a conversion catalyst. The BGDE shows substantial tolerance to 10 vol% CO 2 exhibiting a Faradaic efficiency of ≈45% toward C 2 H 4 at a current density of 80 mA cm −2 , outperforming previous reports that utilized such partial pressure ( P CO2 = 0.1 atm and above) and unaltered polycrystalline copper. Molecular dynamics simulation and mixed gas permeability assessment reveal that such selective performance is ensured by high CO 2 uptake of the microporous HPC as well as continuous desorption owing to the molecular diffusion and concentration gradient created by the binary flow of CO 2 and nitrogen (CO 2 |N 2 ) within the sorbent boundary. Based on detailed techno‐economic analysis, it is concluded that this in situ process can be economically compelling by precluding the C 2 H 4 production cost associated with the energy‐intensive intermediate steps of the conventional decoupled process.
    Type of Medium: Online Resource
    ISSN: 0935-9648 , 1521-4095
    URL: Issue
    URL: Article
    DOI: 10.1002/adma.v35.24
    DOI: 10.1002/adma.202300389
    RVK:
    UA 1538
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1474949-X
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  • 2
    Online Resource
    Online Resource
    Negative stiffness honeycomb structure as automobile leaf spring: A numerical investigation
    Growing Science ; 2023
    In:  Engineering Solid Mechanics Vol. 11, No. 4 ( 2023), p. 389-400
    Details
    In: Engineering Solid Mechanics, Growing Science, Vol. 11, No. 4 ( 2023), p. 389-400
    Abstract: The leaf spring is one of the main components in an automobile which carries the weight of the vehicle and passenger as well as absorbs the vibration and shock produced due to road irregularities. The weight, natural frequency, stress developed, energy absorption, fatigue life, etc. are the key factors that need to be considered to design a leaf spring. Towards that, a novel design integrating a Negative Stiffness Honeycomb Structure (NSHS) in the leaf spring is proposed. The proposed design and the traditional leaf spring are analyzed using the commercially available Finite Element Method (FEM) software Abaqus. Both the traditional and NSHS models were created using Solidworks and modal, harmonic, structural, and transient analyses were performed. It is found that the natural frequency of the NSHS leaf spring is well above the frequency produced due to road irregularities although it is lower than the traditional spring. The total weight of the NSHS spring structure is reduced significantly by 30.73% compared to the traditional spring. Structural analysis shows a lower stress development and higher energy absorption capacity for the NSHS leaf spring. Transient analysis reveals lower mean stress in the proposed NSHS spring. The fatigue life is also found to be 82.78 % higher in the proposed design. The NSHS-incorporated novel leaf spring design may be an excellent alternative to the traditional leaf spring.
    Type of Medium: Online Resource
    ISSN: 2291-8744 , 2291-8752
    URL: Article
    DOI: 10.5267/j.esm.2023.5.005
    Language: Unknown
    Publisher: Growing Science
    Publication Date: 2023
    detail.hit.zdb_id: 2816773-9
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  • 3
    Online Resource
    Online Resource
    Conception rate following intra-cervical artificial insemination using frozen semen at field level in indigenous sheep of Bangladesh
    Bangladesh Academy of Sciences ; 2018
    In:  Asian Journal of Medical and Biological Research Vol. 4, No. 1 ( 2018-06-07), p. 55-62
    Details
    In: Asian Journal of Medical and Biological Research, Bangladesh Academy of Sciences, Vol. 4, No. 1 ( 2018-06-07), p. 55-62
    Abstract: This study was undertaken to study the AI conception rate using frozen semen at field level. Five farms in Mymensingh, Bangladesh were selected for AI Trial in field ewes. Four rams were selected for semen collection, evaluation, and frozen semen production and further to study conception rate followed by intra-cervical AI in both natural and synchronized ewes. Conception rate were confirmed by non-returned rate and ultrasound scanning at 30-40 days of post insemination. The volume, colour, mass activity, sperm motility, viability, concentration, HOST +ve (%) and normal spermatozoa percentages were 0.8±0.3 ml, 3.9±0.3, 4.4±0.6, 81.3±5.0%, 90.0±4.0%, 3519.0±545.6x106/ml, 87.4±3.3% and 85.6±1.8%, respectively. The sperm concentration of ram R#6 was significantly higher (P 〈 0.05) (4120.5±93.5x106/ml) compared with other rams. The mean motility and viability of pre-dilution, 120 minutes of addition of Part-A, 240 minutes of addition of Part-B and post-thaw were (83.8±4.8%, 81.3±2.5%, 80.0±4.1% and 41.3±9.5%) and (93.3±1.0%, 90.0±1.4%, 88.8±1.0% and 58.3±8.7%), respectively. There were no significant difference (P˃0.05) between pre-dilution and post-dilution sperm motility and viability percentage however, post-thaw sperm motility and viability significantly (P 〈 0.05) decreased compare with the motility and viability of pre-dilution and post-dilution values. Motility and viability percentages of frozen semen did not decrease significantly (P 〉 0.05) with the increase of preservation time. The mean motility and viability at 24 hrs, day 7, day 15 and day 30 were 41.3±9.5%, 41.5±8.5%, 41.8±9.9% and 40.5±10.2%; and 59.0±10.1%, 58.5±7.7%, 59.0±8.8% and 57.8±8.3%, respectively. The conception rates in natural and synchronized estrous were 26.7% and 25%, respectively. There was no significant difference in conception rates between the natural and synchronized oestrous in field level. However, the present non-return rate and conception rate indicate the suitability of produced frozen semen application in the field level.Asian J. Med. Biol. Res. March 2018, 4(1): 55-62
    Type of Medium: Online Resource
    ISSN: 2412-5571 , 2411-4472
    URL: Article
    DOI: 10.3329/ajmbr.v4i1.36822
    Language: Unknown
    Publisher: Bangladesh Academy of Sciences
    Publication Date: 2018
    detail.hit.zdb_id: 2831390-2
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  • 4
    Online Resource
    Online Resource
    Sustainable valorization of asphaltenes via flash joule heating
    American Association for the Advancement of Science (AAAS) ; 2022
    In:  Science Advances Vol. 8, No. 46 ( 2022-11-16)
    Details
    In: Science Advances, American Association for the Advancement of Science (AAAS), Vol. 8, No. 46 ( 2022-11-16)
    Abstract: A comprehensive and sustainable technological scheme is developed for converting asphaltene into high-value carbon-based materials.
    Type of Medium: Online Resource
    ISSN: 2375-2548
    URL: Article
    DOI: 10.1126/sciadv.add3555
    Language: English
    Publisher: American Association for the Advancement of Science (AAAS)
    Publication Date: 2022
    detail.hit.zdb_id: 2810933-8
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  • 5
    Online Resource
    Online Resource
    A Comparative Study to Improve Service Ability by Enhancing the Safety Margin of Retaining Walls by Incorporating Metallic Strips or Geotextiles with Soil Mass
    Seventh Sense Research Group Journals ; 2022
    In:  International Journal of Civil Engineering Vol. 9, No. 5 ( 2022-05-30), p. 5-15
    Details
    In: International Journal of Civil Engineering, Seventh Sense Research Group Journals, Vol. 9, No. 5 ( 2022-05-30), p. 5-15
    Type of Medium: Online Resource
    ISSN: 2348-8352
    Uniform Title: English
    URL: Article
    DOI: 10.14445/23488352/IJCE-V9I5P102
    Language: Unknown
    Publisher: Seventh Sense Research Group Journals
    Publication Date: 2022
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  • 6
    Online Resource
    Online Resource
    Effect of pre-hydrolysis and salt- impregnation on biochar production from jute stick
    Springer Science and Business Media LLC ; 2023
    In:  Biomass Conversion and Biorefinery
    Details
    In: Biomass Conversion and Biorefinery, Springer Science and Business Media LLC
    Type of Medium: Online Resource
    ISSN: 2190-6815 , 2190-6823
    URL: Article
    DOI: 10.1007/s13399-023-03846-1
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2592298-1
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  • 7
    Online Resource
    Online Resource
    Preputial Dartos Reinforced Snodgrass Tubularized Incised Plate Urethroplasties in Distal Hypospadias to Prevent Urethrocutaneous Fistula
    Bangladesh Academy of Sciences ; 2015
    In:  Journal of Paediatric Surgeons of Bangladesh Vol. 3, No. 1 ( 2015-06-29), p. 12-17
    Details
    In: Journal of Paediatric Surgeons of Bangladesh, Bangladesh Academy of Sciences, Vol. 3, No. 1 ( 2015-06-29), p. 12-17
    Abstract: Urethro cutaneous fistula( U-C fistula) is the most common complication of hypospadias surgery. It frequently needs separate surgeries for closure, which bring a great deal of physical and mental agony and monetary involvement of the patient and his family. Many efforts have been invented to prevent the u-c fistula with various degree of success. We would like to see the outcome of Preputial Dartos Reinforced Snodgrass Tubularized Incised Plate Urethroplasties in Distal Hypospadias to Prevent Urethrocutaneous Fistula. This interventional study was performed to see the outcome of preputial dartos reinforced Snodgrass tubularized incised plate urethroplasties in distal hypospadias specially urethrocutaneous fistula prevention. For this purpose 40 patients were selected having distal hypospadias age ranging from 6 months to 11 years admitted in the Department of Pediatric Surgery, Mymensingh Medical College & Hospital during the period of January 2010 to March 2011. Out of 40 patients, 20 were in group-A (preputial dartos flap) and another 20 were included in group - B (without flap). All this patients were followed by perioperative and postoperative care. Few patients developed postoperative pyrexia, wound infection, stent blockage which were treated accordingly leaving minimum morbidity. Both groups of patients were followed up for 3 months after surgery. Present study is probably a better technique to prevent fistulaassociated morbidities in distal Snodgrass TIP urethroplasties.J. Paediatr. Surg. Bangladesh 3(1): 12-17, 2012 (January)
    Type of Medium: Online Resource
    ISSN: 2309-1320 , 2077-7469
    URL: Article
    DOI: 10.3329/jpsb.v3i1.23901
    Language: Unknown
    Publisher: Bangladesh Academy of Sciences
    Publication Date: 2015
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  • 8
    Online Resource
    Online Resource
    Combining Ability and Heritability Analysis for Early Maturity and Yield Traits in Contemporary Spring Wheat (Triticum aestivum L.)
    Sciencedomain International ; 2022
    In:  Asian Journal of Advances in Agricultural Research ( 2022-12-02), p. 35-48
    Details
    In: Asian Journal of Advances in Agricultural Research, Sciencedomain International, ( 2022-12-02), p. 35-48
    Abstract: An experiment was carried out with North Carolina Mating Design II (NC II) derived F1 progenies along with parents to know nature of gene action in regulating early maturity, yield and yield contributing traits. The principal objective of this research was to identify best parents and specific cross combinations based on combining ability analysis and estimation of heritability. Hybrids and their parents were arranged in a 8 by 8 partially balanced lattice design with two replicates. Kanchan, BARI Gom-25 × BARI Gom-21, BARI Gom-26 × Kanchan, Rawal × Kanchan, Rawal × BARI Gom-22 and BARI Gom-23 × Kheri showed earliness and BARI Gom-25 × BARI Gom-21 showed highest yield potentiality. The genotypes BARI Gom-28 and BARI Gom-30 were used as checks and the selected genotypes performed comparatively better than the checks. The genetic analysis exhibited significant additive and non-additive genetic variations for all the traits. For earliness and yield potentiality the variance due to SCA was highly significant than GCA. Heritability estimates revealed low broad sense heritability except the traits i.e. days to 50% flowering, days to 100% flowering, plant height and 100-grain weight, which exhibited medium heritability. Narrow sense heritability was low for all the traits. The GCA effect of 15 parental genotypes was insignificant for all the traits that were assessed. BARI Gom-25 x BARI Gom-21, BARI Gom-23 x BARI Gom-21, BARI Gom-25 x BARI Gom-27, BARI Gom-26 x Kanchan, BARI Gom-26 x BARI Gom-28, BARI Gom-25 x BARI Gom-27 showed significant SCA effects for earliness. BARI Gom-25 x BARI Gom-22, BARI Gom-26 x CB51 showed significant SCA effects for yield potentiality.
    Type of Medium: Online Resource
    ISSN: 2456-8864
    URL: Article
    DOI: 10.9734/ajaar/2022/v20i1390
    Language: Unknown
    Publisher: Sciencedomain International
    Publication Date: 2022
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  • 9
    Online Resource
    Online Resource
    Productive and reproductive performances of Sheep at field level of Rajshahi and Mymensingh District of Bangladesh
    Bangladesh Academy of Sciences ; 2018
    In:  Asian Journal of Medical and Biological Research Vol. 4, No. 1 ( 2018-06-07), p. 63-68
    Details
    In: Asian Journal of Medical and Biological Research, Bangladesh Academy of Sciences, Vol. 4, No. 1 ( 2018-06-07), p. 63-68
    Abstract: This study was undertaken to assess the reproductive performances of sheep at field level of Rajshahi and Mymensingh district of Bangladesh during January to December, 2016. A total of 52 farms (26 each in Rajshahi and Mymensingh) were selected for determining the reproductive parameters of ewes. Ewe lambs in Mymensingh reached puberty at significantly (P 〈 0.03) younger age (186.9±18.4 days) than in Rajshihi (199.9±24.9 days). The average age at first pregnancy was 201.4±20.0 days in two regions. Similarly, the ewes in Mymensingh was lambing at significantly (P 〈 0.002) early age than ewes in Rajshahi (356.0±6.8 days vs. 372.7±27.8 days). The observed duration of oestrus at Rajshahi and Mymensingh was 36.0±6.7 hrs and 36.0±7.3 hrs, respectively. The gestation length varied from 145 to 150 days. The average gestation length was 147.9±3.4 days in two regions. The gestation length was not significant (P˃0.05) in the ewes between Rajshahi and Mymensingh (148.7±3.4 and 147.1±3.2 days; respectively). The pooled over litter size was 1.6±0.2 in two regions. However, there was no significant (P 〉 0.05) difference in litter size of ewes in Rajshahi and Mymensingh region (1.7±0.2 vs. 1.6±0.2). The pooled lambing interval was 193.9±21.7 days in two regions. Mean birth weights of lambs, weaning weight and mature weight were 1.7±0.6 vs. 1.3±0.1 kg; 8.9±2.7 vs. 6.9±1.0 kg and 24.9±7.3 vs. 19.4±2.7 kg in Rajshahi and Mymensingh, respectively. These reproductive parameters were significantly higher (P 〈 0.001) in Rajshahi compared with in Mymensingh. The reproductive parameters are almost similar between confined and the traditional management system if the farms are well managed.Asian J. Med. Biol. Res. March 2018, 4(1): 63-68
    Type of Medium: Online Resource
    ISSN: 2412-5571 , 2411-4472
    URL: Article
    DOI: 10.3329/ajmbr.v4i1.36823
    Language: Unknown
    Publisher: Bangladesh Academy of Sciences
    Publication Date: 2018
    detail.hit.zdb_id: 2831390-2
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  • 10
    Online Resource
    Online Resource
    Economic and environmental assessment of asphaltene-derived carbon fiber production
    Royal Society of Chemistry (RSC) ; 2023
    In:  Green Chemistry Vol. 25, No. 16 ( 2023), p. 6446-6458
    Details
    In: Green Chemistry, Royal Society of Chemistry (RSC), Vol. 25, No. 16 ( 2023), p. 6446-6458
    Abstract: In recent years, there has been growing interest in the use of carbon fibers for a wide variety of applications, including automotive, aerospace, wind turbine, sporting goods, energy storage, civil engineering, and grid applications, etc . This momentum is primarily driven by the excellent mechanical, electrical, and thermal properties of carbon fibers. Asphaltenes ( i.e. , the heavy fraction of bitumen) have recently been identified as promising low-cost precursors for developing low-cost carbon fibers that could accelerate the widespread adoption of carbon fibers in existing and new industries. Here we report on the techno-economic and life cycle assessment of asphaltene-derived carbon fiber (A-CF) production to assess its economic and climate benefits. Our techno-economic analysis indicates that the production cost can be kept below USD 9 per kg of A-CF, which is primarily due to the use of the inexpensive asphaltene precursor. Further cost reduction can be achieved by reducing the energy use of the high-temperature carbonization step, which takes up nearly 25% of the production cost. Furthermore, cradle-to-gate life cycle analysis (LCA) reveals that A-CF can offer potential climate benefits as compared to the incumbent precursors (PAN, pitch, and lignin-based CF), with the lowest global warming potential (GWP) of ∼7.46 kg CO 2 -eq per kg of A-CF. Our analysis indicates that precursor (asphaltene) extraction during bitumen partial upgrading stands out as the most energy-intensive phase (32% of total A-CF production energy) and in turn dictates the net environmental impacts. Finally, a commercial scale analysis depicts that our A-CF route can reduce greenhouse gas (GHG) emissions by 48% compared to the combustible use of asphaltene. Moreover, the A-CF route can also displace energy-intensive PAN-based CF (P-CF) with an annual GHG reduction potential of 2081 kilo tonne CO 2 -eq and 4162 kilo tonne CO 2 -eq compared to P-CF if A-CF penetrates 20% and 40%, respectively of the projected global CF market in 2032.
    Type of Medium: Online Resource
    ISSN: 1463-9262 , 1463-9270
    URL: Article
    DOI: 10.1039/D3GC01573D
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2023
    detail.hit.zdb_id: 1485110-6
    detail.hit.zdb_id: 2006274-6
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