Introduction: To estimate a cut off for Reticulocyte Hemoglobin Content (CHr) and compare it with Serum Ferritin for diagnosis of Iron Deficiency Anemia (IDA). Material & Methods: A total of 188 samples were included in the analytical study out of which 126 were categorized as study samples and 62 as control. CBC and Reticulocyte analysis were carried out and the parameters were compared. Results: CHr has a better sensitivity and specificity compared to Serum Ferritin. Low CHr is a marker for early diagnosis of iron deficiency whereas a raised CHr is an early sign of response to iron therapy. A CHr cut-off of 28.4 pg was established which is comparable with that of other studies. Conclusion: The study demonstrates that CHr is a useful parameter that can be confidently used in the diagnosis of IDA.
{"title":"Reticulocyte Hemoglobin Content (CHr): A Reliable indicator in Iron Deficiency Anemia","authors":"Dr. SH Tilva, Dr. UR Parikh, Dr. HM Goswami","doi":"10.56018/20230603","DOIUrl":"https://doi.org/10.56018/20230603","url":null,"abstract":"Introduction: To estimate a cut off for Reticulocyte Hemoglobin Content (CHr) and compare it with Serum Ferritin for diagnosis of Iron Deficiency Anemia (IDA). Material & Methods: A total of 188 samples were included in the analytical study out of which 126 were categorized as study samples and 62 as control. CBC and Reticulocyte analysis were carried out and the parameters were compared. Results: CHr has a better sensitivity and specificity compared to Serum Ferritin. Low CHr is a marker for early diagnosis of iron deficiency whereas a raised CHr is an early sign of response to iron therapy. A CHr cut-off of 28.4 pg was established which is comparable with that of other studies. Conclusion: The study demonstrates that CHr is a useful parameter that can be confidently used in the diagnosis of IDA.","PeriodicalId":30712,"journal":{"name":"BJ Kines National Journal of Basic Applied Sciences","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135471582","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}
Abstract Introduction: Abnormal uterine bleeding (AUB) is a the most common complaint in the gynecology out-patient department that affects significantly the patient’s personal life and it is also responsible for increasing morbidity in women. The histopathological diagnosis of abnormal uterine bleeding (AUB) shows spectrum of patterns and pathologist plays a vital role in the reporting of endometrium and differentiating non-neoplastic lesion from neoplastic lesions, early detection of precursor lesions and exclusion of malignancy. The aim of this study is to study the spectrum of endometrial patterns in women with AUB and to correlate with the different age groups. Materials and methods: The present study was undertaken in histopathology laboratory of Department of Pathology, GMERS medical college and hospital, sola, Ahmedabad for period of 12 months from June 2021 to May 2022. A histopathological study of total 100 cases of endometrial biopsies was done. Biopsies received in 10% formalin were processed and Haematoxylin and Eosin sections were studied. Result: We studied 100 endometrial samples. Age distribution varied from 20 years to 70 years, majority of patients were between 41 to 50years (35%).Menorrhagia was the most common presenting complain. Most common pattern of histopathology was proliferative endometrium (29%) followed by secretory endometrium (14%) and Disorderly proliferative endometrium (9%). Malignancy was detected in (2%) cases. Conclusion: AUB significantly affects the quality life of women and leads to anemia. Hence histopathological examination plays a critical role in early diagnosis of endometrial pathology and provide appropriate gynaecological management. Keywords: Abnormal Uterine Bleeding (AUB), Endometrial biopsy, Histopathological Examination
{"title":"Histopathological Study of Endometrial Sampling in Abnormal Uterine Bleeding","authors":"Shraddha Patel, Jignasa Bhalodia, Deep Patel","doi":"10.56018/20230615","DOIUrl":"https://doi.org/10.56018/20230615","url":null,"abstract":"Abstract Introduction: Abnormal uterine bleeding (AUB) is a the most common complaint in the gynecology out-patient department that affects significantly the patient’s personal life and it is also responsible for increasing morbidity in women. The histopathological diagnosis of abnormal uterine bleeding (AUB) shows spectrum of patterns and pathologist plays a vital role in the reporting of endometrium and differentiating non-neoplastic lesion from neoplastic lesions, early detection of precursor lesions and exclusion of malignancy. The aim of this study is to study the spectrum of endometrial patterns in women with AUB and to correlate with the different age groups. Materials and methods: The present study was undertaken in histopathology laboratory of Department of Pathology, GMERS medical college and hospital, sola, Ahmedabad for period of 12 months from June 2021 to May 2022. A histopathological study of total 100 cases of endometrial biopsies was done. Biopsies received in 10% formalin were processed and Haematoxylin and Eosin sections were studied. Result: We studied 100 endometrial samples. Age distribution varied from 20 years to 70 years, majority of patients were between 41 to 50years (35%).Menorrhagia was the most common presenting complain. Most common pattern of histopathology was proliferative endometrium (29%) followed by secretory endometrium (14%) and Disorderly proliferative endometrium (9%). Malignancy was detected in (2%) cases. Conclusion: AUB significantly affects the quality life of women and leads to anemia. Hence histopathological examination plays a critical role in early diagnosis of endometrial pathology and provide appropriate gynaecological management. Keywords: Abnormal Uterine Bleeding (AUB), Endometrial biopsy, Histopathological Examination","PeriodicalId":30712,"journal":{"name":"BJ Kines National Journal of Basic Applied Sciences","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135471583","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}
Abstract Background: Cervical cancer is the leading cause of death in India. HPV virus is a major infectious etiological factor of cervical cancer. It has been proven that HPV vaccine, if taken before initiation of sexual life, is highly effective in HPV and cervical cancer prevention. Despite its availability, deaths due to cervical cancer has increased rapidly. Healthcare workers, especially the young medical students can play a significant role in recommendation of HPV vaccination among people. So, this study was conducted to study the knowledge, attitude and practices of HPV infection and vaccination among medical students. Methodology: A cross -sectional observational study was conducted in medical students of Narendra Modi Medical College. Three hundred medical students were requested to fill a questionnaire which covered demographic details, knowledge, attitude and practice towards HPV vaccination for cervical cancer prevention. Results:82.66% of students were aware about the HPV infection out of which 71% of the participants knew that cervical cancer can be prevented by HPV vaccine, 66.66% of studentes aware of the availability and 35% were well aware about the correct schedule/dosage of vaccination. Conclusion: Though the knowledge and attitude about the HPV infection and its vaccination is good among the medical students, but the practice of vaccination is poor. Keywords: HPV – Human Papilloma Virus, Knowledge, Attitude, Practice, HPV vaccine, medical students
{"title":"Human Papiloma Virus Vaccination: Knowledge, Attitude and Practice Among Medical Students at Tertiary Care Hospital","authors":"Kruti Deliwala, Mittal Bhabhor, Prakash Prajapati, Jayun Joshi, Bhargavi Khatri, Megha Patel","doi":"10.56018/bjkines2023064","DOIUrl":"https://doi.org/10.56018/bjkines2023064","url":null,"abstract":"Abstract Background: Cervical cancer is the leading cause of death in India. HPV virus is a major infectious etiological factor of cervical cancer. It has been proven that HPV vaccine, if taken before initiation of sexual life, is highly effective in HPV and cervical cancer prevention. Despite its availability, deaths due to cervical cancer has increased rapidly. Healthcare workers, especially the young medical students can play a significant role in recommendation of HPV vaccination among people. So, this study was conducted to study the knowledge, attitude and practices of HPV infection and vaccination among medical students. Methodology: A cross -sectional observational study was conducted in medical students of Narendra Modi Medical College. Three hundred medical students were requested to fill a questionnaire which covered demographic details, knowledge, attitude and practice towards HPV vaccination for cervical cancer prevention. Results:82.66% of students were aware about the HPV infection out of which 71% of the participants knew that cervical cancer can be prevented by HPV vaccine, 66.66% of studentes aware of the availability and 35% were well aware about the correct schedule/dosage of vaccination. Conclusion: Though the knowledge and attitude about the HPV infection and its vaccination is good among the medical students, but the practice of vaccination is poor. Keywords: HPV – Human Papilloma Virus, Knowledge, Attitude, Practice, HPV vaccine, medical students","PeriodicalId":30712,"journal":{"name":"BJ Kines National Journal of Basic Applied Sciences","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135471586","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}
Pub Date : 2022-02-04DOI: 10.29169/1927-5129.2022.18.04
Chan Boon Loong, M. A. Lajis, S. Shamsudin, Nur Elisa Zainodin
Aluminium matrix composite has been increasingly developed due to the impressive performances demonstrated, mechanically and physically. The related properties were enhanced with the addition of reinforcing materials and this tailor-made composite can be used in the area of automotive, aerospace and military. In this study, the matrix composite was developed directly from aluminium chips without remelting through a series of hot press forging operations. This process involved heating the aluminium chip mixtures with 1 to 8 wt% chromium content above the recrystallization temperature. Then, the uniaxial force was subsequently applied onto the composite. For performance measures, the hot pressed composites were tested for the ultimate tensile strength (UTS) and elongation to failure (ETF). The composite with 2 wt % of chromium exhibits significant improvement compared to other samples, with the UTS and ETF reached to 215.37 MPa and 30.65% respectively. This sample exceeds the minimum stress and strain of stock aluminium AA6061-T4. Furthermore, the addition of chromium beyond 2 wt % would generally cause reduction of the mechanical properties of the composite.
{"title":"Impact of Chromium Addition on the UTS and ETF of Aluminium Alloy AA6061 Chips Based Composite","authors":"Chan Boon Loong, M. A. Lajis, S. Shamsudin, Nur Elisa Zainodin","doi":"10.29169/1927-5129.2022.18.04","DOIUrl":"https://doi.org/10.29169/1927-5129.2022.18.04","url":null,"abstract":"Aluminium matrix composite has been increasingly developed due to the impressive performances demonstrated, mechanically and physically. The related properties were enhanced with the addition of reinforcing materials and this tailor-made composite can be used in the area of automotive, aerospace and military. In this study, the matrix composite was developed directly from aluminium chips without remelting through a series of hot press forging operations. This process involved heating the aluminium chip mixtures with 1 to 8 wt% chromium content above the recrystallization temperature. Then, the uniaxial force was subsequently applied onto the composite. For performance measures, the hot pressed composites were tested for the ultimate tensile strength (UTS) and elongation to failure (ETF). The composite with 2 wt % of chromium exhibits significant improvement compared to other samples, with the UTS and ETF reached to 215.37 MPa and 30.65% respectively. This sample exceeds the minimum stress and strain of stock aluminium AA6061-T4. Furthermore, the addition of chromium beyond 2 wt % would generally cause reduction of the mechanical properties of the composite.","PeriodicalId":30712,"journal":{"name":"BJ Kines National Journal of Basic Applied Sciences","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88062448","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}
Pub Date : 2022-02-01DOI: 10.29169/1927-5129.2022.18.03
H. D. Lightfoot, Gerald Ratzer
The current controversy over the cause of increasing global temperatures since the middle of the 20th century comes from the IPCC First Assessment Report issued in 1990. The report states rising carbon dioxide (CO2) warms the air, thereby holding more of the significant warming gas, water vapor. This additional water vapor feeds back to amplify the warming by CO2. The IPCC has continually promoted this concept in its reports since 1990. Up-to-date science proves the IPCC concept is faulty. Scientists discovered that when the Sun's energy output changes, it impacts the Earth's temperature, and it does this cyclically. Current, reliable evidence shows the Earth has just come through a warm period. It is now in the early stages of cooling that might be similar to the Dalton Minimum and last for three or four decades. Average temperatures can drop by up to 1.5oC and increase the rate of crop failures that have already started. It won't be easy to maintain the benefits of the recent warm phase of the Sun during the upcoming solar minimum.
{"title":"The Sun Versus CO2 as the Cause of Climate Change Projected to 2050","authors":"H. D. Lightfoot, Gerald Ratzer","doi":"10.29169/1927-5129.2022.18.03","DOIUrl":"https://doi.org/10.29169/1927-5129.2022.18.03","url":null,"abstract":"The current controversy over the cause of increasing global temperatures since the middle of the 20th century comes from the IPCC First Assessment Report issued in 1990. The report states rising carbon dioxide (CO2) warms the air, thereby holding more of the significant warming gas, water vapor. This additional water vapor feeds back to amplify the warming by CO2. The IPCC has continually promoted this concept in its reports since 1990. Up-to-date science proves the IPCC concept is faulty. Scientists discovered that when the Sun's energy output changes, it impacts the Earth's temperature, and it does this cyclically. Current, reliable evidence shows the Earth has just come through a warm period. It is now in the early stages of cooling that might be similar to the Dalton Minimum and last for three or four decades. Average temperatures can drop by up to 1.5oC and increase the rate of crop failures that have already started. It won't be easy to maintain the benefits of the recent warm phase of the Sun during the upcoming solar minimum.","PeriodicalId":30712,"journal":{"name":"BJ Kines National Journal of Basic Applied Sciences","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88864354","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}
Pub Date : 2022-02-01DOI: 10.29169/1927-5129.2022.18.01
P. Díaz-Herrera, Alan Martín Zavala-Guzmán, Z. Mazur-Czerwiec
One of the main criteria for the selection of a suitable solvent is the CO2 solubility capacity or CO2 loading. The objective of this work is to provide students and early-career scientists a detailed description of a titration-based experiment to measure the CO2 loading using simple and inexpensive volumetric and gravimetric lab apparatus. The performance of the method is corroborated by comparing the experimental uncertainty obtained during the determination of the CO2 concentration in test samples (in an absorption unit at lab scale) with reference values obtained by mass balance based on a certified gas analyser. The results indicate that CO2 loading values between the experimental method and the reference range from ±3 to 13%, which is in good agreement with other similar methods.
{"title":"Description of an Experimental Method to Measure the CO2 Loading in Monoethanomine Solutions using BaCO3 Titration Technique","authors":"P. Díaz-Herrera, Alan Martín Zavala-Guzmán, Z. Mazur-Czerwiec","doi":"10.29169/1927-5129.2022.18.01","DOIUrl":"https://doi.org/10.29169/1927-5129.2022.18.01","url":null,"abstract":"One of the main criteria for the selection of a suitable solvent is the CO2 solubility capacity or CO2 loading. The objective of this work is to provide students and early-career scientists a detailed description of a titration-based experiment to measure the CO2 loading using simple and inexpensive volumetric and gravimetric lab apparatus. The performance of the method is corroborated by comparing the experimental uncertainty obtained during the determination of the CO2 concentration in test samples (in an absorption unit at lab scale) with reference values obtained by mass balance based on a certified gas analyser. The results indicate that CO2 loading values between the experimental method and the reference range from ±3 to 13%, which is in good agreement with other similar methods.","PeriodicalId":30712,"journal":{"name":"BJ Kines National Journal of Basic Applied Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88412882","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}
Experimental evaluation of conventional solar still (CSS) and CSS with sand-filled glass bottles (Modified solar still (MSS)) have been reported in this article. Two identical CSS were fabricated for the experiments. The experiments were designed and performed under Guna (India) weather conditions in November 2021. Sand-filled glass bottles were paced as sensible energy-storing material. The mathematical model proposed by Kumar and Tiwari has been utilized to evaluate internal heat transfers, internal efficiency, and exergy efficiency. For checking the economic feasibility of sand-filled glass bottle within CSS, a comparative cost analysis has been performed to evaluate CPL (Cost per Litre). It has been observed that the MSS has yielded 21.32% more than CSS. And overall internal efficiency has also increased by 139.45% due to the presence of sand-filled glass bottles.
{"title":"Impact of Sand Filled Glass Bottles on Performance of Conventional Solar Still","authors":"Pankaj Dumka, Harshit Gautam, Saksham Sharma, Chinmay Gunawat, Dhananjay R. Mishra","doi":"10.29169/1927-5129.2022.18.02","DOIUrl":"https://doi.org/10.29169/1927-5129.2022.18.02","url":null,"abstract":"Experimental evaluation of conventional solar still (CSS) and CSS with sand-filled glass bottles (Modified solar still (MSS)) have been reported in this article. Two identical CSS were fabricated for the experiments. The experiments were designed and performed under Guna (India) weather conditions in November 2021. Sand-filled glass bottles were paced as sensible energy-storing material. The mathematical model proposed by Kumar and Tiwari has been utilized to evaluate internal heat transfers, internal efficiency, and exergy efficiency. For checking the economic feasibility of sand-filled glass bottle within CSS, a comparative cost analysis has been performed to evaluate CPL (Cost per Litre). It has been observed that the MSS has yielded 21.32% more than CSS. And overall internal efficiency has also increased by 139.45% due to the presence of sand-filled glass bottles.","PeriodicalId":30712,"journal":{"name":"BJ Kines National Journal of Basic Applied Sciences","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83295052","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}
Pub Date : 2021-12-01DOI: 10.29169/1927-5129.2021.17.18
Tahereh Doroudgar Jorshari, M. A. Roudbari
Nowadays, the mechanical characteristics of micro-/nano-structures in the various types of engineering disciplines are considered as remarkable criteria which may restrict the performance of small-scale structures in the reality for a certain application. This paper deals with a comprehensive review pertinent to using the nonlocal strain-gradient continuum mechanics model of size-dependent micro-/nano-beams/-plates. According to the non-classical features of materials, using size-dependent continuum mechanics theories is mandatory to investigate accurately the mechanical characteristics of the micro-/nano-structures. Recently, the number of researches related to the analysis of micro-/nano-structures with various geometry including beams as well as plates is considerable. In this regard, the mechanical behavior of these structures induced by different loadings such as vibration, wave propagation, and buckling behavior associated with the nonlocal strain-gradient continuum mechanics model is presented in this review work. Proposing the most valuable literature pertinent to the nonlocal strain-gradient continuum mechanics theory of micro-/nano-beams/plates is the main objective of this detailed survey.
{"title":"A Review on the Mechanical Behavior of Size-Dependent Beams and Plates using the Nonlocal Strain-Gradient Model","authors":"Tahereh Doroudgar Jorshari, M. A. Roudbari","doi":"10.29169/1927-5129.2021.17.18","DOIUrl":"https://doi.org/10.29169/1927-5129.2021.17.18","url":null,"abstract":"Nowadays, the mechanical characteristics of micro-/nano-structures in the various types of engineering disciplines are considered as remarkable criteria which may restrict the performance of small-scale structures in the reality for a certain application. This paper deals with a comprehensive review pertinent to using the nonlocal strain-gradient continuum mechanics model of size-dependent micro-/nano-beams/-plates. According to the non-classical features of materials, using size-dependent continuum mechanics theories is mandatory to investigate accurately the mechanical characteristics of the micro-/nano-structures. Recently, the number of researches related to the analysis of micro-/nano-structures with various geometry including beams as well as plates is considerable. In this regard, the mechanical behavior of these structures induced by different loadings such as vibration, wave propagation, and buckling behavior associated with the nonlocal strain-gradient continuum mechanics model is presented in this review work. Proposing the most valuable literature pertinent to the nonlocal strain-gradient continuum mechanics theory of micro-/nano-beams/plates is the main objective of this detailed survey.","PeriodicalId":30712,"journal":{"name":"BJ Kines National Journal of Basic Applied Sciences","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73856120","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}
Pub Date : 2021-11-11DOI: 10.29169/1927-5129.2021.17.17
O. S. Mayi, J. Njock, M. Ndamé
Energy analysis provides the ability to assess performance and determine the size of equipment in a system. However, precisely integrating the thermal behavior of the component equipment makes it possible to better assess the performance of the system. This work highlights the influence of the thermal behavior of a 3CT-IHE on the performance and size of the equipment of SEAM with NH3-NaSCN as a working fluid. Based on equations of conservation balances of mass, species and energy, the energy analysis made showed that depending on the magnitude of the heat flows of the weak and strong solutions involved in the heat exchange at the level of the 3CT-IHE, there are different temperature ranges for which the weak solution or the strong solution governs the heat transfer, thus giving rise to the notions of “thermal heating efficiency” and “thermal cooling efficiency” respectively. The results obtained were compared with those of Sun. This new approach has demonstrated better performance of the SEAM for the same operating conditions. It has also been shown that it is possible to increase the temperature of the generator above 90 °C without resorting to another working fluid and that in the case of subjecting NH3-NaSCN to supercritical conditions in temperature at the generator; it is possible to obtain a machine COP greater than 1 and an even smaller pump size.
{"title":"New Approach in the Energy Analysis of an NH3-NaSCN Single Effect Absorption Machine (SEAM) with a Counter-Current Coaxial Tubes Internal Heat Exchanger (3CT-IHE)","authors":"O. S. Mayi, J. Njock, M. Ndamé","doi":"10.29169/1927-5129.2021.17.17","DOIUrl":"https://doi.org/10.29169/1927-5129.2021.17.17","url":null,"abstract":"Energy analysis provides the ability to assess performance and determine the size of equipment in a system. However, precisely integrating the thermal behavior of the component equipment makes it possible to better assess the performance of the system. This work highlights the influence of the thermal behavior of a 3CT-IHE on the performance and size of the equipment of SEAM with NH3-NaSCN as a working fluid. Based on equations of conservation balances of mass, species and energy, the energy analysis made showed that depending on the magnitude of the heat flows of the weak and strong solutions involved in the heat exchange at the level of the 3CT-IHE, there are different temperature ranges for which the weak solution or the strong solution governs the heat transfer, thus giving rise to the notions of “thermal heating efficiency” and “thermal cooling efficiency” respectively. The results obtained were compared with those of Sun. This new approach has demonstrated better performance of the SEAM for the same operating conditions. It has also been shown that it is possible to increase the temperature of the generator above 90 °C without resorting to another working fluid and that in the case of subjecting NH3-NaSCN to supercritical conditions in temperature at the generator; it is possible to obtain a machine COP greater than 1 and an even smaller pump size.","PeriodicalId":30712,"journal":{"name":"BJ Kines National Journal of Basic Applied Sciences","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78569252","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}
Pub Date : 2021-10-02DOI: 10.29169/1927-5129.2021.17.10
M. Balasubramanian
{"title":"Pressure Prediction by Programme Logic Control Approach on Superplastic Forming in 7075 Al Alloy","authors":"M. Balasubramanian","doi":"10.29169/1927-5129.2021.17.10","DOIUrl":"https://doi.org/10.29169/1927-5129.2021.17.10","url":null,"abstract":"","PeriodicalId":30712,"journal":{"name":"BJ Kines National Journal of Basic Applied Sciences","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76230555","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}
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