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Latif MS, Ara JG, Ara R, Ismatsara M, Haque SMA, Bose SK, Shanto RA, Tanzem S, Sultana M, Biswas TR. A Morphometric Study of Glenoid Cavity of Scapula in Bangladeshi Population. Mymensingh Med J 2024; 33:334-340. [PMID: 38557507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
This cross-sectional descriptive purposive study was conducted among 150 (70 right and 80 left) fully ossified dry human scapulae of Bangladeshi people from January 2019 to December 2019 in the Department of Anatomy, Mymensingh Medical College, Mymensingh. Shape of the glenoid cavity was observed as pear, oval or inverted comma shape. Morphometric parameters such as length and breadth of glenoid cavity were measured by digital Vernier slide calipers. In this study, 19.13% cases were found inverted comma shaped, 35.65% cases were oval and 45.22% cases were pear shaped. The mean±SD length of glenoid cavity was 37.5±3.61 mm and 36.19±3.68 mm on right and left sided scapulae respectively and mean±SD breadth was 23.6±2.73 mm on right and 23.42±2.75 mm on left side respectively. Mean±SD glenoid cavity index was 62.89±4.39 on right and 64.61±4.74 on left sided scapulae. Morphometric analysis of glenoid fossa of scapula might help clinicians in shoulder and its associated diseases.
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Affiliation(s)
- M S Latif
- Dr Md Safat Latif, Lecturer, Department of Anatomy, Mymensingh Medical College (MMC), Mymensingh, Bangladesh; E-mail:
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Latif MS, Khalil M, Sultana SZ, Kabir A, Bose SK, Shanto RA, Ahmed M, Ara R, Islam S, Sultana M, Haque SMA. Variation of Acromiocoracoid and Acromioglenoid Distance in Bangladeshi People. Mymensingh Med J 2024; 33:168-173. [PMID: 38163789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
This cross-sectional descriptive purposive study was done on 150 (70 right and 80 left) fully ossified dry human scapulae of Bangladeshi people to find out the variation in length of acromiocoracoid and acromioglenoid distance. Sample collection was carried out in the Department of Anatomy, Mymensingh Medical College, Bangladesh from January to December 2019. Any kind of damaged or broken scapulae were excluded to maintain standard measurement. Length of these distances was measured with the help of digital Vernier slide calipers. The mean±SD acromiocoracoid distance were 35.8±4.64 mm and 36.32±5.55 mm on right and left sided scapulae respectively and the mean±SD acromioglenoid distance were 27.69±3.43 mm on right sided scapulae and 28.18±3.26 mm on left sided scapulae. These data are important to compare Bangladeshi scapulae to those from various other races that could contribute to demographic studies of shoulder disease probability and management in Bangladeshi population.
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Affiliation(s)
- M S Latif
- Dr Md Safat Latif, Lecturer, Department of Anatomy, Mymensingh Medical College (MMC), Mymensingh, Bangladesh; E-mail:
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Shanto RA, Khalil M, Sultana SZ, Epsi EZ, Bose SK, Latif MS, Siddiquee T, Russel MTH, Sumi SA. Variation of Mid shaft Antero-posterior and Transverse Diameter of Femur in Bangladeshi People. Mymensingh Med J 2024; 33:234-238. [PMID: 38163798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Femoral morphometric variation is a dynamic system for different region, which is influenced by geographical, physiological and environmental factors, due to the adaptation, functional and remodeling responses of bones. This descriptive cross-sectional study was conducted on 150 (64 right and 86 left) fully ossified dry human femur of Bangladeshi people to find out the variation of mid shaft antero-posterior and transverse diameter of femur. Sample was collected in the Department of Anatomy, Mymensingh Medical College (MMC), Bangladesh from January 2019 to December 2019. All samples were assessed to eliminate fractured, pathologically damaged and remodeled bones. The diameters were measured with the help of digital Vernier slide calipers. The mean±SD mid shaft antero-posterior diameter of right and left femur were 25.03±2.86 mm and 25.54±2.65mm respectively. The mean±SD transverse diameter of right and left femur was 24.24±2.43mm and 24.54±2.38mm respectively. The knowledge of variations in the parameters of dry femora will help the orthopedicians for the treatment and management of femoral shaft fracture. These data also provide information about mid shaft diameter of femur of Bangladeshi people and to compare these data to those from various other races. Thus it could contribute for the design of well-fitting prosthesis which suits the Bangladeshi population. This value may be considered while making a best-fit femoral prosthesis.
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Affiliation(s)
- R A Shanto
- Dr Rafuja Afrin Shanto, Assistant Professor, Department of Anatomy, Dhaka Central International Medical College, Ring Road, Shyamoli, Dhaka, Bangladesh; E-mail:
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Jabeen L, Khalil M, Mannan S, Sultana SZ, Bose SK, Sumi SA, Khan NJ, Nitu NS, Jannat T, Alam MT. A Postmortem Study of Length & Depth of the Central Sulcus in Different Age & Sex Groups of Bangladeshi People. Mymensingh Med J 2021; 30:368-375. [PMID: 33830116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The central sulcus (CS) is a prominent landmark of the brain, separating the parietal lobe from the frontal lobe and the primary motor cortex from the primary somatosensory cortex. Variations in the morphology of the central sulcus are seen with respect to the length and depth of the central sulcus. This study was done to establish a normal standard of length and depth of central sulcus in different age and sex groups of Bangladeshi people. Interhemispheric age and gender differences of the central sulcus were done by cross sectional descriptive study which was performed into four categories- Group A (20 to 29 years), Group B (30 to 39 years), Group C (40 to 49 years) and Group D (50 years & above). The specimens were collected from morgue in the department of Forensic Medicine, Mymensingh Medical College, Bangladesh by purposive sampling technique. The length of central sulcus was measured by using thread and the depth was measured by using wooden stick at middle of the upper, middle and lower third of the central sulcus in superolateral surface. The mean length of central sulcus was 10.51±0.529cm to 9.78±0.996cm in male and 10.27±0.786cm to 8.83±0.379cm in female. Depth of the central sulcus was 1.333±0.100cm to 1.029±0.125cm in male and 1.173±0.144cm to 1.01±0.200cm in female. The difference in mean length & depth of the central sulcus for both left and right hemisphere between male and female was statistically non significant in all age groups. In present study the length and depth of the central sulcus showed gradual decreasing values with advancing age. Knowledge of morphometry of central sulcus is not only important during neurosurgery of brain but also holds tremendous significance in diagnosis and management of diseases of the cerebral cortex. The present study will help to increase the information pool on the length and depth of the central sulcus of Bangladeshi people which will minimize the dependency on foreign standards.
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Affiliation(s)
- L Jabeen
- Dr Labiba Jabeen, Assistant Professor, Department of Anatomy, Bikrampur Bhuiyan Medical College, Munshiganj, Bangladesh; E-mail:
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Begum T, Ahmed S, Khatun S, Arman R, Nahar L, Zisa RS, Bose SK, Hossain MM, Paul J. Measurement of Placental Index in Different Gestational Age Groups in Bangladeshi Women. Mymensingh Med J 2021; 30:143-147. [PMID: 33397865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Placenta is the mirror of maternal and fetal status; it reflects the changes due to complications in pregnancy of mother. The growth and survival of the fetus in utero is directly related to formation, development and maturation of the placenta. Placental index was correlated to poor pregnancy outcomes. Placental index can help to identify fetal growth restriction which is result of placental insufficiency and is characterized by insufficient trasnsplacental transport of nutrients and oxygen. This cross sectional descriptive study would provide information about the ratio of placental index in different gestational age group in Bangladeshi women. To achieve this aim the study was performed on 60 human placenta and corresponding fetuses and gestational age (in weeks) categorized as Group A (28-32), Group B (33-37), Group C (38-40). These sample and information were collected from normal pregnancy in Gynecology and Obstetrics Department of Mymensingh Medical College Hospital from July 2009 to June 2010. After preservation in 10% formal saline, study was done in Department of Anatomy in Mymensingh Medical College. In this study, the mean±SD placental index was in Group A (0.187±0.113), Group B (0.153±0.025) and Group C (0.166±0.025) and also observed that mean placental index decreased with age up to certain level then increase in Group C. The mean placental index was maximum in Group A (0.187±0.113) and was minimum in Group B (0.153±0.025). The mean difference of placental index between Groups A&B, A&C and B&C was statistically not significant. Observed findings of this study were compared with those of Western and Bangladeshi researches.
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Affiliation(s)
- T Begum
- Dr Taslima Begum, Associate Professor, Department of Anatomy, President Abdul Hamid Medical College, Kishoreganj, Bangladesh; E-mail:
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Jia X, Zeng H, Bose SK, Wang W, Yin H. Chitosan oligosaccharide induces resistance to Pst DC3000 in Arabidopsis via a non-canonical N-glycosylation regulation pattern. Carbohydr Polym 2020; 250:116939. [PMID: 33049851 DOI: 10.1016/j.carbpol.2020.116939] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/11/2020] [Accepted: 08/11/2020] [Indexed: 12/20/2022]
Abstract
Roles of protein N-glycosylation in chitosan oligosaccharide (COS) induced resistance were investigated in the present study. Results demonstrated that N-glycosylation deficient Arabidopsis mutants (stt3a and ManI) were more susceptible against Pseudomonas syringae pv. tomato DC3000 (Pst DC3000) than wild type (WT) plants. Surprisingly, in stt3a and ManI, COS-induced resistance to Pst DC3000 was mostly intact, and the up-regulation effect on SA- and JA-mediated signalling pathways also similar like WT. Nucleotide sugars accumulation and N-glycosylation related genes expression were differently regulated after COS treatment. Global glycomics analysis quantified 157 N-glycan isomers, and 56.7, 50.3 and 47.1 % of them were significantly changed in COS, mock + Pst, and COS + Pst treated plants, respectively. Moreover, COS pretreatment could reverse the effect of Pst DC3000 on many N-glycans, suggesting that COS regulates protein N-glycosylation via a non-canonical pattern compared with plant defense, which may contribute to its obvious disease control effect when N-glycosylation impairment occurs.
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Affiliation(s)
- Xiaochen Jia
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Haihong Zeng
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Santosh Kumar Bose
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Wenxia Wang
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Heng Yin
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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Bose SK, He Y, Howlader P, Wang W, Yin H. The N-glycan processing enzymes β-D-N-acetylhexosaminidase are involved in ripening-associated softening in strawberry fruit. J Food Sci Technol 2020; 58:621-631. [PMID: 33568856 DOI: 10.1007/s13197-020-04576-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 05/03/2020] [Accepted: 06/12/2020] [Indexed: 01/02/2023]
Abstract
Excessive softening of fruits during the ripening process leads to rapid deterioration. N-glycan processing enzymes are reported to play important roles during fruit ripening associated softening. Efforts have been made to identify and purify β-D-N-acetyl hexosaminidase (β-Hex) from strawberry fruit and also to investigate its function during ripening. More than that, the postharvest treatment effect of alginate oligosaccharides (AOS) at a concentration of 0.1 g L-1 on fruit firmness and the activity of N-glycan processing enzymes were also investigated during the storage of strawberry. Results demonstrated that the full-length of β-Hex 1 and β-Hex 2 genes were 2186 and 2013 bp, including an ORF of 1598 and 1724 bp and encoding 532 and 574 amino acids with a predicted molecular weight of 60 and 71 kDa, respectively. Moreover, β-hex enzyme activity and the expression of their encoding genes increased during the ripening of strawberry. In addition, postharvest application of AOS delayed the loss of firmness and suppressed the activity of N-glycan processing enzymes (α-Man and β-Hex) along with N-glycan processing enzymes associated genes expression resulting in delayed fruit softening. Therefore, our study suggests that N-glycan processing enzymes may play roles in strawberry softening and AOS treatment suppressed enzymes activity and preserve firmness of the fruit.
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Affiliation(s)
- Santosh Kumar Bose
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China.,University of Chinese Academy of Sciences, Beijing, 100049 China.,Department of Horticulture, Patuakhali Science and Technology University, Patuakhali, Bangladesh
| | - Yanqiu He
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
| | - Prianka Howlader
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China.,University of Chinese Academy of Sciences, Beijing, 100049 China.,Department of Horticulture, Patuakhali Science and Technology University, Patuakhali, Bangladesh
| | - Wenxia Wang
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China.,Natural Products and Glyco-Biotechnology Lab, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road, Dalian, China
| | - Heng Yin
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China.,University of Chinese Academy of Sciences, Beijing, 100049 China.,Natural Products and Glyco-Biotechnology Lab, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road, Dalian, China
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Bose SK, Mannan S, Sultana SZ, Zahan AA, Sumi SA, Sultana N, Jabeen L, Barsha TN, Latif MS, Santo RA. Length of Umbilical Cord in Different Gestational Age Groups of Healthy Pregnant Mother of Bangladesh. Mymensingh Med J 2020; 29:263-268. [PMID: 32506076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This cross sectional descriptive study was performed on 80 human placenta and umbilical cord to find out the variation in length of umbilical cord of healthy Bangladeshi mother in relation to different gestational age. This study was conducted in the Department of Anatomy, Mymensingh Medical College, Mymensingh, from January to December 2018. The specimens were collected from the Department of Gynaecology and Obstetrics, Mymensingh Medical College Hospital, Mymensingh, Bangladesh by purposive sampling technique. According to gestational age the collected samples were divided into three groups. They were Group A (28 to 36 weeks), Group B (37 to 40 weeks) and Group C (above 40 weeks) and examined morphologically by fine dissection method. The length of umbilical cord was measured with the help of flexible tape in cm. For statistical analysis, differences of length between age groups were analyzed by using unpaired student 't' test. The mean±SD length of umbilical cord was 56.15±7.61cm in Group A, 62.54±8.78cm in Group B and 68.54±10.53cm in Group C. It was also observed that the mean length of the umbilical cord was increased with increase of gestational age. The mean difference of length of umbilical cord between Groups A and C was statistically highly significant (p<0.001), difference between Groups A and B was statistically moderately significant (p<0.01) but the difference between Groups B and C was statistically significant (p<0.05). This study was done to provide information about the length of umbilical cord in different gestational ages of healthy pregnancies.
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Affiliation(s)
- S K Bose
- Dr Sanjib Kumar Bose, M Phil Student (Thesis Part Complete), Department of Anatomy, Mymensingh Medical College (MMC), Mymensingh, Bangladesh
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Jia X, Qin H, Bose SK, Liu T, He J, Xie S, Ye M, Yin H. Proteomics analysis reveals the defense priming effect of chitosan oligosaccharides in Arabidopsis-Pst DC3000 interaction. Plant Physiol Biochem 2020; 149:301-312. [PMID: 32120172 DOI: 10.1016/j.plaphy.2020.01.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 01/29/2020] [Accepted: 01/30/2020] [Indexed: 05/02/2023]
Abstract
Chitosan oligosaccharides (COS) worked effectively in multiple plant-pathogen interactions as plant immunity regulator, however, due to the complexity of the COS-induced immune signaling network, the topic requires further investigation. In the present study, quantitative analysis of proteins was performed to investigate the underlying mechanism of COS induced resistance to Pseudomonas syringae pv. tomato DC3000 (Pst DC3000) in Arabidopsis thaliana. 4303 proteins were successfully quantified, 186, 217 and 207 proteins were differently regulated in mock + Pst, COS, and COS + Pst treated plants, respectively, compared with mock plants. From detailed functional and hierarchical clustering analysis, a priming effect of COS on plant immune system by pre-regulated the key proteins related to signaling transduction, defense response, cell wall biosynthesis and modification, plant growth and development, gene transcription and translation, which confers enhanced resistance when Pst DC3000 infection in Arabidopsis. Moreover, RACK1B which has the potential to be the key kinase receptor for COS signals was found out by protein-protein interaction network analysis of COS responsive proteins. In conclusion, COS treatment enable plant to fine-tuning its defense mechanisms for a more rapid and stronger response to future pathogen attacks, which obviously enhances plants defensive capacity that makes COS worked effectively in multiple plant-pathogen interactions.
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Affiliation(s)
- Xiaochen Jia
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Hongqiang Qin
- Key Laboratory of Separation Science for Analytical Chemistry, National Chromatographic R & A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Santosh Kumar Bose
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Tongmei Liu
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Jinxia He
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Shangqiang Xie
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Mingliang Ye
- Key Laboratory of Separation Science for Analytical Chemistry, National Chromatographic R & A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
| | - Heng Yin
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
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Bose SK, Howlader P, Jia X, Wang W, Yin H. Alginate oligosaccharide postharvest treatment preserve fruit quality and increase storage life via Abscisic acid signaling in strawberry. Food Chem 2019; 283:665-674. [DOI: 10.1016/j.foodchem.2019.01.060] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/03/2019] [Accepted: 01/08/2019] [Indexed: 01/28/2023]
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Abstract
We report a detailed study of neuromorphic switching behaviour in inherently complex percolating networks of self-assembled metal nanoparticles. We show that variation of the strength and duration of the electric field applied to this network of synapse-like atomic switches allows us to control the switching dynamics. Switching is observed for voltages above a well-defined threshold, with higher voltages leading to increased switching rates. We demonstrate two behavioral archetypes and show how the switching dynamics change as a function of duration and amplitude of the voltage stimulus. We show that the state of each synapse can influence the activity of the other synapses, leading to complex switching dynamics. We further demonstrate the influence of the morphology of the network on the measured device properties, and the constraints imposed by the overall network conductance. The correlated switching dynamics, device stability over long periods, and the simplicity of the device fabrication provide an attractive pathway to practical implementation of on-chip neuromorphic computing.
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Affiliation(s)
- S K Bose
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand.
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Sumi SA, Sultana SZ, Mannan S, Paul UK, Khan MS, Faruque MO, Rahman M, Sultana N, Khan NJ, Jabeen L, Jannat T, Bose SK. Variations in the Position of Vermiform Appendix in Bangladeshi People. Mymensingh Med J 2019; 28:54-59. [PMID: 30755551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This cross sectional descriptive study was performed on 70 postmortem vermiform appendices (male 34 and female 36) to find out the various positions of vermiform appendix of Bangladeshi people. The specimens were collected from autopsy laboratory of the Department of Forensic Medicine, Mymensingh Medical College, Mymensingh, Bangladesh by purposive sampling technique from October 2016 to March 2017. The collected samples were divided into four age groups. They were Group A (upto 20 years), Group B (21 to 40 years), Group C (41 to 60 years) and Group D (above 60 years). Dissection was performed according to standard autopsy technique. During postmortem examination abdominal cavity was routinely exposed by classical midline incision from xiphoid process to the symphysis pubis and a semicircular incision around the umbilicus and the flaps were reflected to give a good view of the abdominal cavity along with its contents and then the taeniae coli of the caecum were identified. The three taeniae coli of the caecum converge at the base of the appendix and become its longitudinal muscle coat. The anterior caecal taeniae coli acts as the best guide for identification of the vermiform appendix. The relation of the base of the appendix to the caecum is constant but the position of the vermiform appendix, which is variable, was studied in relation to caecum and the terminal part of the ileum. Accordingly the position of the vermiform appendix was noted either retrocaecal, pelvic, preileal or postileal, subcaecal. All data were recorded in the predesigned data sheet, analyzed by SPSS program (version 21, 2012) and compared with the findings of other national and international studies and standard text books. Among 70 specimens, 44(62.9%) vermiform appendices were retrocaecal in position. The next common position was pelvic which was in 22(31.4%) specimen followed by postileal in 3(4.3%) specimen and subcaecal was observed only in 1(1.4%) specimen. In this study in all age groups incidence of retrocaecal vermiform appendix was highest and it was about 67.6%, 50%, 69.2% and 72.7% in Group A, B, C, D respectively. Pelvic position was 7.1%, 46.9%, 23.1% and 27.3% in Group A, B, C, D respectively. Subcaecal vermiform appendix was absent in Group A, B and Group D. On the other hand postileal vermiform appendix was absent in Group C and Group D. The findings of this study may help the physician and the surgeons for proper diagnosis, management and treatment of disease of vermiform appendix.
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Affiliation(s)
- S A Sumi
- Dr Sharmin Akter Sumi, M Phil Student Thesis Part Complete, Department of Anatomy, Mymensingh Medical College (MMC), Mymensingh, Bangladesh
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Sardana K, Bajaj S, Bose SK. Successful treatment of PAPA syndrome with minocycline, dapsone, deflazacort and methotrexate: a cost-effective therapy with a 2-year follow-up. Clin Exp Dermatol 2018; 44:577-579. [PMID: 30259545 DOI: 10.1111/ced.13792] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2018] [Indexed: 12/22/2022]
Affiliation(s)
- K Sardana
- Department of Dermatology Venereology and Leprosy, PGIMER Dr RML Hospital, New Delhi, India
| | - S Bajaj
- Department of Dermatology, Fjórðungssjúkrahúsið á Akureyri, Akureyri, Iceland
| | - S K Bose
- Indraprastha Apollo Hospitals, New Delhi, India
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He Y, Bose SK, Wang W, Jia X, Lu H, Yin H. Pre-Harvest Treatment of Chitosan Oligosaccharides Improved Strawberry Fruit Quality. Int J Mol Sci 2018; 19:ijms19082194. [PMID: 30060488 PMCID: PMC6121239 DOI: 10.3390/ijms19082194] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/24/2018] [Accepted: 07/25/2018] [Indexed: 11/30/2022] Open
Abstract
Chitosan oligosaccharide (COS), derived through hydrolysis of chitosan, has been proved to be an effective plant immunity elicitor, eco-friendly, and easily soluble in water, and influenced several secondary metabolites content to improve fruit qualities. COS are widely used in agriculture to improve the defense response in plants. The purpose of this study was to investigate the pre-harvest treatment effect of COS on the quality of strawberry (Fragaria × ananassa cv.qingxiang). COS was dissolved in distilled water at a concentration of 50 mg·L−1 and sprayed at four different growth stages of strawberry plants, namely seedling stage, before flowering, fruit coloring (the stage of fruit from white to red) and full bloom. Uniform size, shape, color, without any visible damage, and disease-free fruits were harvested for determining the quality. The results showed that the fruit firmness, viscosity, lignin, sugars, protein, total soluble solid, and titratable acidity content increased in COS-treated fruits compared to control. In addition, COS pre-harvest treatment had a positive effect on anthocyanin, total phenol, flavonoid, vitamin C content and DPPH(2,2-diphenyl-1-picrylhydrazyl) scavenging activity of strawberry. Moreover, COS also increased the cell wall composition and regulated gene expression of some important enzymes involved in ethylene compound biosynthesis and cell wall degradation. The finding of this study suggests that pre-harvest application of COS is very useful for improving quality and antioxidant capacity of strawberry.
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Affiliation(s)
- Yanqiu He
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
- Dalian Ocean University, 52# Heishijiao Street, Shahekou District, Dalian 116023, China.
| | - Santosh Kumar Bose
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Wenxia Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Xiaochen Jia
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Hang Lu
- Dalian Ocean University, 52# Heishijiao Street, Shahekou District, Dalian 116023, China.
| | - Heng Yin
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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15
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Bose SK, Lawrence CP, Liu Z, Makarenko KS, van Damme RMJ, Broersma HJ, van der Wiel WG. Evolution of a designless nanoparticle network into reconfigurable Boolean logic. Nat Nanotechnol 2015; 10:1048-1052. [PMID: 26389658 DOI: 10.1038/nnano.2015.207] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 08/13/2015] [Indexed: 06/05/2023]
Abstract
Natural computers exploit the emergent properties and massive parallelism of interconnected networks of locally active components. Evolution has resulted in systems that compute quickly and that use energy efficiently, utilizing whatever physical properties are exploitable. Man-made computers, on the other hand, are based on circuits of functional units that follow given design rules. Hence, potentially exploitable physical processes, such as capacitive crosstalk, to solve a problem are left out. Until now, designless nanoscale networks of inanimate matter that exhibit robust computational functionality had not been realized. Here we artificially evolve the electrical properties of a disordered nanomaterials system (by optimizing the values of control voltages using a genetic algorithm) to perform computational tasks reconfigurably. We exploit the rich behaviour that emerges from interconnected metal nanoparticles, which act as strongly nonlinear single-electron transistors, and find that this nanoscale architecture can be configured in situ into any Boolean logic gate. This universal, reconfigurable gate would require about ten transistors in a conventional circuit. Our system meets the criteria for the physical realization of (cellular) neural networks: universality (arbitrary Boolean functions), compactness, robustness and evolvability, which implies scalability to perform more advanced tasks. Our evolutionary approach works around device-to-device variations and the accompanying uncertainties in performance. Moreover, it bears a great potential for more energy-efficient computation, and for solving problems that are very hard to tackle in conventional architectures.
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Affiliation(s)
- S K Bose
- NanoElectronics Group, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, Enschede 7500 AE, The Netherlands
| | - C P Lawrence
- NanoElectronics Group, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, Enschede 7500 AE, The Netherlands
- Programmable NanoSystems and Formal Methods and Tools, MESA+ Institute for Nanotechnology and CTIT Institute for ICT research, University of Twente, PO Box 217, Enschede 7500 AE, The Netherlands
| | - Z Liu
- NanoElectronics Group, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, Enschede 7500 AE, The Netherlands
| | - K S Makarenko
- NanoElectronics Group, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, Enschede 7500 AE, The Netherlands
| | - R M J van Damme
- Multiscale Modeling and Simulation, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, Enschede 7500 AE, The Netherlands
| | - H J Broersma
- Programmable NanoSystems and Formal Methods and Tools, MESA+ Institute for Nanotechnology and CTIT Institute for ICT research, University of Twente, PO Box 217, Enschede 7500 AE, The Netherlands
| | - W G van der Wiel
- NanoElectronics Group, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, Enschede 7500 AE, The Netherlands
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16
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Ataç D, Gang T, Yilmaz MD, Bose SK, Lenferink ATM, Otto C, de Jong MP, Huskens J, van der Wiel WG. Tuning the Kondo effect in thin Au films by depositing a thin layer of Au on molecular spin-dopants. Nanotechnology 2013; 24:375204. [PMID: 23975183 DOI: 10.1088/0957-4484/24/37/375204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report on the tuning of the Kondo effect in thin Au films containing a monolayer of cobalt(II) terpyridine complexes by altering the ligand structure around the Co(2+) ions by depositing a thin Au capping layer on top of the monolayer on Au by magnetron sputtering (more energetic) and e-beam evaporation (softer). We show that the Kondo effect is slightly enhanced with respect to that of the uncapped film when the cap is deposited by evaporation, and significantly enhanced when magnetron sputtering is used. The Kondo temperature (TK) increases from 3 to 4.2/6.2 K for the evaporated/sputtered caps. X-ray absorption spectroscopy and surface-enhanced Raman spectroscopy investigation showed that the organic ligands remain intact upon Au e-beam evaporation; however, sputtering inflicts significant change in the Co(2+) electronic environment. The location of the monolayer-on the surface or embedded in the film-has a small effect. However, the damage of Co-N bonds induced by sputtering has a drastic effect on the increase of the impurity-electron interaction. This opens up the way for tuning of the magnetic impurity states, e.g. spin quantum number, binding energy with respect to the host Fermi energy, and overlap via the ligand structure around the ions.
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Affiliation(s)
- D Ataç
- NanoElectronics Group, MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
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17
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Obied LH, Crandles DA, Antonov VN, Bose SK, Jepsen O. Infrared spectroscopy and the ferromagnetic transition in Gd. J Phys Condens Matter 2013; 25:036002. [PMID: 23221360 DOI: 10.1088/0953-8984/25/3/036002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The low energy electronic structure of Gd has been investigated experimentally by infrared reflectance spectroscopy, and theoretically from first principles, using the fully relativistic Dirac linear-muffin-tin-orbital (LMTO) method in the local spin density approximation (LSDA) as well as within the LSDA + U approach. The reflectance of a Gd single crystal was measured with the electric field in the plane perpendicular to the c-axis for temperatures between 50 K and slightly above the Curie temperature (293 K) in the frequency range between 100 and 12 000 cm(-1) (0.013-1.5 eV). As Gd enters the ferromagnetic state, the dissipative part of the optical conductivity exhibits interesting spectral weight transfers over the whole spectral range measured. It is shown that the ab initio calculations reproduce well the experimental spectra for the ferromagnetic state and allow one to explain the microscopic origin of the optical response of Gd in terms of interband transitions.
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Affiliation(s)
- L H Obied
- Department of Physics, Brock University, St. Catharines, ON, L2S 3A1, Canada
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18
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Gang T, Yilmaz MD, Ataç D, Bose SK, Strambini E, Velders AH, de Jong MP, Huskens J, van der Wiel WG. Tunable doping of a metal with molecular spins. Nat Nanotechnol 2012; 7:232-236. [PMID: 22306840 DOI: 10.1038/nnano.2012.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Accepted: 12/23/2011] [Indexed: 05/31/2023]
Abstract
The mutual interaction of localized magnetic moments and their interplay with itinerant conduction electrons in a solid are central to many phenomena in condensed-matter physics, including magnetic ordering and related many-body phenomena such as the Kondo effect, the Ruderman-Kittel-Kasuya-Yoshida interaction and carrier-induced ferromagnetism in diluted magnetic semiconductors. The strength and relative importance of these spin phenomena are determined by the magnitude and sign of the exchange interaction between the localized magnetic moments and also by the mean distance between them. Detailed studies of such systems require the ability to tune the mean distance between the localized magnetic moments, which is equivalent to being able to control the concentration of magnetic impurities in the host material. Here, we present a method for doping a gold film with localized magnetic moments that involves depositing a monolayer of a metal terpyridine complex onto the film. The metal ions in the complexes can be cobalt or zinc, and the concentration of magnetic impurities in the gold film can be controlled by varying the relative amounts of cobalt complexes (which carry a spin) and zinc complexes (which have zero spin). Kondo and weak localization measurements demonstrate that the magnetic impurity concentration can be systematically varied up to ∼800 ppm without any sign of inter-impurity interaction. Moreover, we find no evidence for the unwanted clustering that is often produced when using alternative methods.
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Affiliation(s)
- T Gang
- NanoElectronics Group, MESA+ Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE, Enschede, The Netherlands
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19
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Shotbolt P, Stokes PR, Owens SF, Toulopoulou T, Picchioni MM, Bose SK, Murray RM, Howes OD. Striatal dopamine synthesis capacity in twins discordant for schizophrenia. Psychol Med 2011; 41:2331-2338. [PMID: 21426628 DOI: 10.1017/s0033291711000341] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Elevated striatal dopamine synthesis capacity is thought to be fundamental to the pathophysiology of schizophrenia and has also been reported in people at risk of psychosis. It is therefore unclear if striatal hyperdopaminergia is a vulnerability marker for schizophrenia, or a state feature related to the psychosis itself. Relatives of patients with schizophrenia are themselves at increased risk of developing the condition. In this study we examined striatal dopamine synthesis capacity in both members of twin pairs discordant for schizophrenia. METHOD In vivo striatal dopamine synthesis capacity was examined using fluorine-18-l-dihydroxyphenylalanine (18F-DOPA) positron emission tomography (PET) scans in seven twin pairs discordant for schizophrenia and in a control sample of 10 healthy control twin pairs. RESULTS Striatal 18F-DOPA uptake was not elevated in the unaffected co-twins of patients with schizophrenia (p=0.65) or indeed in the twins with schizophrenia (p=0.89) compared to the control group. Levels of psychotic symptoms were low in the patients with schizophrenia who were in general stable [mean (s.d.) Positive and Negative Syndrome Scale (PANSS) total=56.8 (25.5)] whereas the unaffected co-twins were largely asymptomatic. CONCLUSIONS Striatal dopamine synthesis capacity is not elevated in symptom-free individuals at genetic risk of schizophrenia, or in well-treated stable patients with chronic schizophrenia. These findings suggest that striatal hyperdopaminergia is not a vulnerability marker for schizophrenia.
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Affiliation(s)
- P Shotbolt
- Psychiatric Imaging, MRC Clinical Sciences Centre, Hammersmith Hospital, Imperial College London, London, UK.
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20
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Rizzo G, Turkheimer FE, Keihaninejad S, Bose SK, Hammers A, Bertoldo A. Multi-Scale hierarchical generation of PET parametric maps: application and testing on a [11C]DPN study. Neuroimage 2011; 59:2485-93. [PMID: 21924366 DOI: 10.1016/j.neuroimage.2011.08.101] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 08/29/2011] [Accepted: 08/31/2011] [Indexed: 11/27/2022] Open
Abstract
We propose a general approach to generate parametric maps. It consists in a multi-stage hierarchical scheme where, starting from the kinetic analysis of the whole brain, we then cascade the kinetic information to anatomical systems that are akin in terms of receptor densities, and then down to the voxel level. A-priori classes of voxels are generated either by anatomical atlas segmentation or by functional segmentation using unsupervised clustering. Kinetic properties are transmitted to the voxels in each class using maximum a posteriori (MAP) estimation method. We validate the novel method on a [11C]diprenorphine (DPN) test-retest data-set that represents a challenge to estimation given [11C]DPN's slow equilibration in tissue. The estimated parametric maps of volume of distribution (VT) reflect the opioid receptor distributions known from previous [11C]DPN studies. When priors are derived from the anatomical atlas, there is an excellent agreement and strong correlation among voxel MAP and ROI results and excellent test-retest reliability for all subjects but one. Voxel level results did not change when priors were defined through unsupervised clustering. This new method is fast (i.e. 15 min per subject) and applied to [11C]DPN data achieves accurate quantification of VT as well as high quality VT images. Moreover, the way the priors are defined (i.e. using an anatomical atlas or unsupervised clustering) does not affect the estimates.
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Affiliation(s)
- G Rizzo
- Department of Information Engineering, University of Padova, Padova, Italy
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21
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Ramlackhansingh AF, Bose SK, Ahmed I, Turkheimer FE, Pavese N, Brooks DJ. Adenosine 2A receptor availability in dyskinetic and nondyskinetic patients with Parkinson disease. Neurology 2011; 76:1811-6. [PMID: 21606452 DOI: 10.1212/wnl.0b013e31821ccce4] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
OBJECTIVE To investigate striatal adenosine A2A receptor availability in patients with Parkinson disease (PD) with and without levodopa-induced dyskinesias (LIDs). While providing effective relief from the motor symptoms of PD, chronic levodopa use is associated with development of LIDs. A2A receptors are expressed on the bodies of indirect pathway medium spiny striatal neurons and on dopamine terminals and play a role in modulating dopamine transmission. A2A antagonists have antiparkinsonian activity by boosting levodopa efficacy. We aimed to study A2A receptor availability in patients with PD with and without LIDs using PET and [¹¹C]SCH442416, an A2A antagonist. METHODS Six patients with PD with and 6 without LIDs were studied withdrawn 12 hours from medication. Their PET findings were compared with 6 age-matched healthy controls. Using spectral analysis, [¹¹C]SCH442416 regional volumes of distribution (V(T)) were computed for the caudate, putamen, and thalamus and binding potentials (BP(ND)) reflecting the ratio of specific:nonspecific uptake were compared between groups. RESULTS A2A binding in the caudate and putamen of subjects with PD with LIDs was far higher (p = 0.026 and p = 0.036, respectively) than that of subjects with PD without LIDs, which lay within the control range. Thalamic A2A availability was similar for all 3 groups. CONCLUSION Patients with PD with LIDs show increased A2A receptor availability in the striatum. This finding is compatible with altered adenosine transmission playing a role in LIDs and provides a rationale for a trial of A2A receptor agents in the treatment of these motor complications.
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Affiliation(s)
- A F Ramlackhansingh
- Room 244, Cyclotron Building, Hammersmith Hospital, Du Cane Road, London W120NN, UK.
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22
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Biswas D, Misbahuddin M, Roy U, Francis RC, Bose SK. Effect of additives on fiber yield improvement for kraft pulping of kadam (Anthocephalus chinensis). Bioresour Technol 2011; 102:1284-1288. [PMID: 20829036 DOI: 10.1016/j.biortech.2010.08.059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 08/09/2010] [Accepted: 08/13/2010] [Indexed: 05/29/2023]
Abstract
Projected decline in future wood resources has prompted researchers to try various additives in existing pulping processes for fiber yield improvement. Many studies have been conducted in the past aimed at improving kraft pulp yield with the use of additives in the cooking liquor. In this study, the effects of anthraquinone (AQ) and 2-methylanthraquinone (MAQ) on the pulp yield of kadam (Anthocephalus chinensis) were investigated. Three different active alkali doses (14%, 16% and 19% as NaOH) along with 0.1% of AQ or MAQ on chips were used to obtain various levels of delignification of the hardwood. Addition of AQ or MAQ to kraft pulping, increased fiber yield (0.5-2.7% on chips) and improved delignification selectivity (lignin vs. carbohydrate removal). Increases in pulp yield due to AQ or MAQ were more significant at lower doses of active alkalis. The viscosities and the physical strength properties of the pulps with kappa numbers 16-19 were comparable to kraft although there was a minor decrease in tensile strength for the kraft/MAQ pulp.
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Affiliation(s)
- D Biswas
- Bangladesh Forest Research Institute, P.O. Box 273, Chittagong-4000, Bangladesh
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23
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Bose SK. Electron-phonon coupling and spin fluctuations in 3d and 4d transition metals: implications for superconductivity and its pressure dependence. J Phys Condens Matter 2009; 21:025602. [PMID: 21813987 DOI: 10.1088/0953-8984/21/2/025602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We have calculated the electron-phonon coupling for the complete 4d series and the nonmagnetic 3d transition metals using the linear response method and the linear muffin-tin orbitals' basis. A comparison of the linear response results and those obtained via the rigid muffin-tin approximation is provided. Based on the calculated values of the electron-phonon coupling constants, band density of states and the measured values of the electronic specific heat constants, we estimate the spin-fluctuation effects, i.e. the electron-spin-fluctuation (electron-paramagnon) coupling constants in these systems. For the sake of comparison, several other metals, Cu, Zn, Ag, Cd, Al and Pb, are also studied. Alternative estimates of the electron-paramagnon coupling constants are obtained from the values of the Stoner parameters and the band densities of states at the Fermi level. Implications of these results on the superconductivity and its pressure dependence as well as the alloying effects of superconductivity in these systems are discussed. It is pointed out that spin fluctuations play an important role in the validity of the Matthias rule that in metallic systems the optimum conditions for (electron-phonon) superconductivity occur for 5 and 7 valence electrons/atom.
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Affiliation(s)
- S K Bose
- Physics Department, Brock University, St Catharines, ON, L2S 3A1, Canada
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24
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Francis RC, Bolton TS, Abdoulmoumine N, Lavrykova N, Bose SK. Positive and negative aspects of soda/anthraquinone pulping of hardwoods. Bioresour Technol 2008; 99:8453-8457. [PMID: 18420403 DOI: 10.1016/j.biortech.2008.02.055] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2007] [Revised: 02/18/2008] [Accepted: 02/18/2008] [Indexed: 05/26/2023]
Abstract
The positive aspects of the non-sulfur soda/anthraquinone (SAQ) process are mostly tied to improved energy efficiency while lower pulp brightness after bleaching is its most significant drawback. A credible method that quantifies bleachability as well as an approach that solves the problem for SAQ pulps from hardwoods will be described. A straight line correlation (R2=0.904) was obtained between O2 kappa number and final light absorption coefficient (LAC) value after standardized OD0EpD1 bleaching of nine hardwood kraft pulps from three laboratories and one pulp mill. The bleachability of pulps from four different soda processes catalyzed by anthraquinone (AQ) and 2-methylanthraquinone (MAQ) was compared to that of conventional kraft pulps by comparing O2 kappa number decrease and final LAC values. It was observed that a mild hot water pre-hydrolysis improved the bleachability of SAQ pulps to a level equal to that of kraft.
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Affiliation(s)
- R C Francis
- Faculty of Paper and Bioprocess Engineering/Empire State Paper Research Institute, SUNY College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210, USA.
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Keller T, Aynajian P, Habicht K, Boeri L, Bose SK, Keimer B. Momentum-resolved electron-phonon interaction in lead determined by neutron resonance spin-echo spectroscopy. Phys Rev Lett 2006; 96:225501. [PMID: 16803318 DOI: 10.1103/physrevlett.96.225501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2006] [Revised: 03/15/2006] [Indexed: 05/10/2023]
Abstract
Neutron resonance spin-echo spectroscopy was used to monitor the temperature evolution of the linewidths of transverse acoustic phonons in lead across the superconducting transition temperature over an extended range of the Brillouin zone. For phonons with energies below the superconducting energy gap, a linewidth reduction of maximum amplitude was observed below . The electron-phonon contribution to the phonon lifetime extracted from these data is in satisfactory overall agreement with ab initio lattice-dynamical calculations, but significant deviations are found.
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Affiliation(s)
- T Keller
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
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Chowdhury B, Adak M, Bose SK. Flurbiprofen, a unique non-steroidal anti-inflammatory drug with antimicrobial activity against Trichophyton, Microsporum and Epidermophyton species. Lett Appl Microbiol 2003; 37:158-61. [PMID: 12859660 DOI: 10.1046/j.1472-765x.2003.01370.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS The objective of this study was to determine the antifungal activity of flurbiprofen against dermatophytes like Trichophyton, Microsporum and Epidermophyton species. METHODS AND RESULTS Susceptibility tests were performed against dermatophytes like Trichophyton, Microsporum and Epidermophyton species by the microbroth dilution method. Among the dermatophytes tested, Trichophyton, Microsporum and Epidermophyton species are remarkably susceptible to this compound (MIC(50): 8-16 microg ml(-1)). A yeast pathogen, Candida albicans, and a bacterium, Staphylococcus aureus, are also susceptible to flurbiprofen. CONCLUSIONS Flurbiprofen is a non-steroidal anti-inflammatory compound with strong antifungal activity, which is not found in two well known and medically used antifungal organic acids like benzoic and salicylic acids. SIGNIFICANCE AND IMPACT OF THE STUDY The present action of flurbiprofen on microbes indicates its future prospects as an antimicrobial agent against dermatophytes and yeast pathogens. However, in view of the anti-inflammatory property of flurbiprofen, its antifungal action may provide an additional advantage for use as a skin ointment.
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Affiliation(s)
- B Chowdhury
- Department of Biology, Memorial University of Newfoundland, St John's, Newfoundland A1B 3X9, Canada.
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Alexanian M, Bose SK. Comment on "Generation of phase states by two-photon Absorption". Phys Rev Lett 2000; 85:1136. [PMID: 10991493 DOI: 10.1103/physrevlett.85.1136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/1999] [Indexed: 05/23/2023]
Affiliation(s)
- M Alexanian
- Physics Department University of North Carolina at Wilmington Wilmington, North Carolina 28403, USA
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Sarkar A, Pradhan S, Mukhopadhyay I, Bose SK, Roy S, Chatterjee M. Inhibition of early DNA-damage and chromosomal aberrations by Trianthema portulacastruml. In carbon tetrachloride-induced mouse liver damage. Cell Biol Int 2000; 23:703-8. [PMID: 10736194 DOI: 10.1006/cbir.1999.0439] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The underlying molecular mechanisms of the antihepatotoxic activity of Trianthema portulacastrum by monitoring its effect on mouse liver DNA-chain break, sugar-base damage and chromosomal aberrations, during chronic or acute treatment with carbon tetrachloride (CCl(4)) have been studied. Daily oral feeding with the ethanolic extract (150 mg/kg basal diet, per os) was given 2 weeks before CCl(4)treatment and continued until the end of the experiment (13 weeks). T. portulacastrum extract offer unique protection (P< 0.05-0. 001) against the induction of liver-specific structural-type chromosomal anomalies 15, 30 or 45 days after the last CCl(4)insult, compared to control mice. This was further evidenced by extract-mediated protection (15 days prior feeding following a single necrogenic dose of CCl(4)) of the generation of DNA chain-break and Fe-sugar-base damage assays. The observed hepatoprotective mechanism could be due to its ability to counteract oxidative injury to DNA in the liver of mouse.
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Affiliation(s)
- A Sarkar
- Division of Biochemistry, Department of Pharmaceutical Technology, Jadavpur University, Calcutta, 700 032, India
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Roknabadi SM, Bose SK, Taneja V. A histidine thiol 100 kDa, tetrameric acid phosphatase from lentil, Lens esculenta, seeds with the characteristics of protein tyrosine phosphatases. Biochim Biophys Acta 1999; 1433:272-80. [PMID: 10446377 DOI: 10.1016/s0167-4838(99)00118-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
A non-specific acid phosphatase (APase) hydrolysing L-tyrosine-O-phosphate and 3'-AMP was purified to electrophoretic homogeneity from mature lentil seeds with apparent native molecular mass of 100 kDa and subunit molecular mass of 24 kDa. These activities appear to reside on the same protein which shows a single band in native and SDS-PAGE. The pH optimum is 5.5, while the K(m) (mM) and V(max) (micromoles/min/mg protein) for p-nitrophenyl phosphate (pNPP) are 0.7 and 9.2 and for L-tyrosine-O-phosphate 1.4 and 10.1, respectively, at 30 degrees C and for 3'-AMP, 2 and 4.4 at 37 degrees C. The protein also hydrolyses other phosphomonoesters to a lesser extent. L-Tyrosine-O-phosphate, 3'-AMP and pNPP hydrolysis is potently inhibited by micromolar orthovanadate and also to nearly the same extent by sodium fluoride, potassium tartrate and metal ions. Histidine and cysteine are likely to be involved in the catalysis. Thermal inactivation studies indicate that the active site conformations for pNPP and 3'-AMP hydrolytic activities are different. The enzyme shows the characteristics of the animal protein tyrosine phosphatase.
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Affiliation(s)
- S M Roknabadi
- Department of Biochemistry, Faculty of Science, Banaras Hindu University, Varanasi-221 005, India
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Bose SK, Taneja V. Induction of a germination specific, low molecular weight, acid phosphatase isozyme with specific phosphotyrosine phosphatase activity in lentil (Lens esculenta) seeds. Biochem Biophys Res Commun 1998; 250:629-34. [PMID: 9784397 DOI: 10.1006/bbrc.1998.9364] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A germination specific isozyme of acid phosphatase (EC 3.1.3.2) hydrolysing O-phospho-L-Tyrosine, pH optima 5.5 is induced in lentil seeds. When seeds at 0 h, 24 h and 36 h of germination are electrophorezed, native PAGE on specific enzyme staining shows several constitutive isozymes of acid phosphatases. At 48 h, an isozyme is induced which gradually decreases and then disappears at 108 h of germination. The short lived, induced isozyme is present in the embryo and seed-coat but not in the plumule and the radical. Induction of this isozyme is inhibited by cycloheximide and actinomycin-D and increased by plant growth regulators such as heteroauxin and gibbrellic acid treatment during germination. The induced isozyme is a single 30 kD polypeptide, with subunit molecular mass of 25 kD, shows activity for O-phospho-L-Tyrosine. It is strongly inhibited by vanadate (microM), molybdate, tungustate as also by iodoacetate, p-chloromercuribenzoate and diethylpyrocarbonate. This study shows for the first time that the germination induced low molecular weight Acid phosphatase is a Tyrosine phosphatase super family class IV enzyme, having a role in cellular differentiation and development during seed germination.
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Affiliation(s)
- S K Bose
- Faculty of Science, Banaras Hindu University, Varanasi-, 221005, India
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Sarkar B, Das U, Bhattacharyya S, Bose SK. Studies on the aerobic photooxidation of cysteine using riboflavin as a sensitizer: evidence for the photogeneration of a superoxide anion and hydrogen peroxide. Biol Pharm Bull 1997; 20:910-2. [PMID: 9300140 DOI: 10.1248/bpb.20.910] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The riboflavin sensitized oxidation of cysteine under an aerobic condition was investigated. The effects of various scavengers, such as superoxide dismutase, catalase, mannitol, sodium azide and potassium ferrocyanide (an electron donor), on the photooxidation were determined. A reaction mechanism involving the superoxide anion is proposed for the photooxidation of cysteine to cysteic acid.
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Affiliation(s)
- B Sarkar
- Department of Chemistry, University College of Science, University of Calcutta, India
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Abstract
A purified ATP transporter from Aspergillus niger did not show release or uptake for any of the nucleotides (ADP or UTP) except ATP. The release and uptake did not result from non-specific binding, but appeared to be concentration-dependent processes. ATP was shown by a double-isotopic technique to be transported across membrane vesicles without degradation. The ATP-transport protein was purified to near homogeneity from the membrane vesicles of a strain of A. niger and its apparent Mr was approximately 60000. The purified protein showed the properties of a membrane-bound protein in that the carrier protein was shown, during the liposome-preparative process, to translocate from the aqueous phase into the lipid bilayer of the liposome, unlike the cytosolic protein glucose-6-phosphate dehydrogenase, which remained confined to the aqueous compartment. Mycobacillin, a lipid-reactive antibiotic, was bound to the transport protein at a site other than the ATP-binding site, leading to its enhanced release or uptake, which was very feeble in absence of the antibiotic.
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Affiliation(s)
- B Chowdhury
- Department of Biochemistry, University of Calcutta, India
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Abstract
Exogenous plasminogen activators (PAs), such as streptokinase (SK) and tissue plasminogen activator (tPA), have been shown to significantly improve the mortality of patients with acute myocardial infarction. However, reperfusion of the myocardium is associated with neutrophil activation and infiltration into the infarct region. Plasminogen activators influence neutrophil function in vitro, but no data exists regarding the effect of exogenous PAs on inflammation in vivo. Therefore, we evaluated the effect of PAs on inflammation using the carrageenan-induced rat footpad inflammation model. The magnitude of carrageenan-induced inflammation was determined by water-displacement and neutrophil infiltration, following administration of either tPA or SK to Sprague-Dawley rats. tPA (12 mg/kg) inhibited carrageenan-induced inflammation (p < .01). In contrast, administration of SK (40,000 U/kg) enhanced inflammation. These results suggest that exogenous PAs influence the inflammatory process but specific PAs differ in their actions. Ultimately, these differences may influence the efficacy of these agents in the management of acute myocardial infarction and lead to further evaluation of tPA in other inflammatory diseases such as acute respiratory distress syndrome (ARDS) and rheumatoid arthritis (RA), in which neutrophil-mediated injury is likely.
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Affiliation(s)
- K A Stringer
- Department of Pharmacy Practice, School of Pharmacy, Denver, CO 80262, USA
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Abstract
A rare case of Melkersson-Rosenthal syndrome with all the cardinal signs of the triad, including facial swelling, facial nerve palsy and glossitis, is described. The additional feature of this case was an association with rosacea.
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Affiliation(s)
- S K Bose
- Indraprastha Apollo Hospitals, New Delhi, India
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Bose SK. Treatment of pustular vasculitis in rheumatoid arthritis with colchicine. Natl Med J India 1996; 9:297-8. [PMID: 9111796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Abstract
By utilizing the oxygen-sensitive Escherichia coli Mn-superoxide dismutase (Mn-SOD) promoter, we have developed a vector system that expresses high levels of cloned foreign genes. The promoter for the bacterial Mn-SOD, as well as both 5'-untranslated and transcriptional termination sequences were ligated to a synthetic linker containing two restriction enzyme cloning sites. The vector also contained the gene for beta-lactamase, which confers ampicillin resistance to the host bacterium and provides a selectable marker. After screening and selection, high level of expression was achieved by exposure to the superoxide-generating agent paraquat (methyl viologen) as the inducer. To test the vector, both native and mutated human Mn-SOD cDNAs were cloned and expressed, respectively. To determine the optimal concentration of inducer necessary for maximal expression, recombinant bacteria were exposed to increasing concentrations of paraquat and subsequently assayed for superoxide dismutase (SOD) activity. The highest expression was induced by 20 microM paraquat, and approached 50% of total soluble protein.
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Affiliation(s)
- B Gao
- Webb-Waring Institute for Biomedical Research, University of Colorado Health Sciences Center, Denver 80262, USA
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Reid RW, Bose SK, Mitrovic B. Spin-glass behavior of frustrated two-dimensional Penrose lattice in the classical planar model. Phys Rev B Condens Matter 1996; 54:R740-R743. [PMID: 9985423 DOI: 10.1103/physrevb.54.r740] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
Medical management of vitiligo usually gives complete repigmentation in up to 60 to 90% of cases (4, 7). Modified Thiersh grafting, in which psoralen without UVA or solar radiation was used successfully, is described.
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Bose SK. Pentoxiphylline in contact hypersensitivity reactions. Indian J Dermatol Venereol Leprol 1996; 62:135-137. [PMID: 20948015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Hamed F, Razavi FS, Bose SK, Startseva T. Spin fluctuations in metallic glasses Zr75(NixFe1-x)25 at ambient and higher pressures. Phys Rev B Condens Matter 1995; 52:9674-9678. [PMID: 9980017 DOI: 10.1103/physrevb.52.9674] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Alexanian M, Bose SK. Unitary transformation and the dynamics of a three-level atom interacting with two quantized field modes. Phys Rev A 1995; 52:2218-2224. [PMID: 9912482 DOI: 10.1103/physreva.52.2218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Bose SK. Sneddon-wilkinson disease and arthritis. Indian J Dermatol Venereol Leprol 1995; 61:231-232. [PMID: 20952966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Sneddon-Wilkinson disease (subcorneal pustular dermatosis) is an uncommon disorder. An unusual association with seronegative arthritis is reported with review of literature.
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Affiliation(s)
- S K Bose
- Department of Dermatological Surgery and Dermatological Reserach, Skin Institute and School of Dermatology, N block, Kailash Colony, New Delhi - 48, India
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Bose SK. Is micropigmentation surgery an answer to stable bindi-induced depigmentation? J Dermatol 1995; 22:533-4. [PMID: 7560450 DOI: 10.1111/j.1346-8138.1995.tb03441.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Bose SK. Ciprofloxacin-induced bullous fixed drug eruption. Indian J Dermatol Venereol Leprol 1995; 61:238-239. [PMID: 20952970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Sabiryanov RF, Bose SK, Mryasov ON. Effect of topological disorder on the itinerant magnetism of Fe and Co. Phys Rev B Condens Matter 1995; 51:8958-8973. [PMID: 9977535 DOI: 10.1103/physrevb.51.8958] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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