Pub Date : 2024-05-01Epub Date: 2024-05-31DOI: 10.5187/jast.2023.e65
Chang-Hwan Jeong, Sol-Hee Lee, Hack-Youn Kim
This study was designed to determine the optimal aging conditions after analyzing the physicochemical and microbiological properties of dry-aged chicken breast using an electric field supercooling system (EFSS). Chicken breast was aged for up 5 weeks at three different temperatures (0°C, -1°C, and -2°C). Aging and trimming loss at -2°C treatment showed lower values than at 0°C and -1°C treatments. Thiobarbituric acid reactive substances and volatile basic nitrogen in all treatments increased during the aging process but showed the lowest levels at -2°C. As a result of analysis of aerobic bacteria, it is microbiologically safe to dry-age for up to 2 weeks at 0°C and up to 3 weeks at -1°C and -2°C. Therefore, the dry-aged chicken breast with EFSS was optimally aged for 3 weeks at -2°C.
{"title":"Optimization of dry-aging conditions for chicken meat using the electric field supercooling system.","authors":"Chang-Hwan Jeong, Sol-Hee Lee, Hack-Youn Kim","doi":"10.5187/jast.2023.e65","DOIUrl":"10.5187/jast.2023.e65","url":null,"abstract":"<p><p>This study was designed to determine the optimal aging conditions after analyzing the physicochemical and microbiological properties of dry-aged chicken breast using an electric field supercooling system (EFSS). Chicken breast was aged for up 5 weeks at three different temperatures (0°C, -1°C, and -2°C). Aging and trimming loss at -2°C treatment showed lower values than at 0°C and -1°C treatments. Thiobarbituric acid reactive substances and volatile basic nitrogen in all treatments increased during the aging process but showed the lowest levels at -2°C. As a result of analysis of aerobic bacteria, it is microbiologically safe to dry-age for up to 2 weeks at 0°C and up to 3 weeks at -1°C and -2°C. Therefore, the dry-aged chicken breast with EFSS was optimally aged for 3 weeks at -2°C.</p>","PeriodicalId":73837,"journal":{"name":"Journal of molecular graphics","volume":"5 1","pages":"603-613"},"PeriodicalIF":2.7,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11222114/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75404132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-27eCollection Date: 2024-01-01DOI: 10.29399/npa.28366
Tuncay Gündüz, Sadık Server, Cem İsmail Küçükali, Onur Özyurt, Gülşen Akman Demir, Murat Kürtüncü
Introduction: Parenchymal Neuro-Behçet's disease (p-NBD) usually presents with a characteristic lesion in the mesodiencephalic region. However, there is a lack of information regarding the axonal integrity of normal-appearing white matter in p-NBD. Diffusion tensor imaging (DTI) is based on the properties of diffusivity and anisotropy that indicate the integrity of axons. The primary objective of the study was to compare p-NBD patients to healthy controls using diffusion tensor magnetic resonance imaging (DTI-MRI).
Methods: The study enrolled parenchymal p-NBD patients who maintained stable disease status for 12 months. Healthy controls were chosen from a population with a similar age and gender distribution. Axial DTI was acquired using single-shot echo-planar imaging. Group analyses were carried out using the track-based spatial statistics tool of FMRIB software library (FSL). Correlations between DTI parameters and clinical outcomes were analyzed in the patient group.
Results: We recruited 12 patients with p-NBD and 12 healthy individuals. We found significant fractional anisotropy (FA), mean diffusivity (MD), and radial diffusivity (RD) differences in the superior longitudinal fasciculus, superior corona radiata, anterior corona radiata, body and genu of the corpus callosum, external capsule, and anterior limb of the internal capsule, mainly in the frontal white matter.
Conclusion: Patients with p-NBD exhibit significant DTI alterations in the otherwise normal-appearing frontal association tracts. This study may contribute to a better understanding of the neuropsychological impairment pattern in patients with p-NBD, which is often associated with frontal cognitive networks.
{"title":"Diffusion Tensor Imaging in Parenchymal Neuro-Behçet's Disease.","authors":"Tuncay Gündüz, Sadık Server, Cem İsmail Küçükali, Onur Özyurt, Gülşen Akman Demir, Murat Kürtüncü","doi":"10.29399/npa.28366","DOIUrl":"10.29399/npa.28366","url":null,"abstract":"<p><strong>Introduction: </strong>Parenchymal Neuro-Behçet's disease (p-NBD) usually presents with a characteristic lesion in the mesodiencephalic region. However, there is a lack of information regarding the axonal integrity of normal-appearing white matter in p-NBD. Diffusion tensor imaging (DTI) is based on the properties of diffusivity and anisotropy that indicate the integrity of axons. The primary objective of the study was to compare p-NBD patients to healthy controls using diffusion tensor magnetic resonance imaging (DTI-MRI).</p><p><strong>Methods: </strong>The study enrolled parenchymal p-NBD patients who maintained stable disease status for 12 months. Healthy controls were chosen from a population with a similar age and gender distribution. Axial DTI was acquired using single-shot echo-planar imaging. Group analyses were carried out using the track-based spatial statistics tool of FMRIB software library (FSL). Correlations between DTI parameters and clinical outcomes were analyzed in the patient group.</p><p><strong>Results: </strong>We recruited 12 patients with p-NBD and 12 healthy individuals. We found significant fractional anisotropy (FA), mean diffusivity (MD), and radial diffusivity (RD) differences in the superior longitudinal fasciculus, superior corona radiata, anterior corona radiata, body and genu of the corpus callosum, external capsule, and anterior limb of the internal capsule, mainly in the frontal white matter.</p><p><strong>Conclusion: </strong>Patients with p-NBD exhibit significant DTI alterations in the otherwise normal-appearing frontal association tracts. This study may contribute to a better understanding of the neuropsychological impairment pattern in patients with p-NBD, which is often associated with frontal cognitive networks.</p>","PeriodicalId":73837,"journal":{"name":"Journal of molecular graphics","volume":"1 1","pages":"39-46"},"PeriodicalIF":1.1,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10943938/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75395424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Reports an error in "Resilience predicts posttraumatic cognitions after a trauma reminder task and subsequent positive emotion induction among veterans with PTSD" by Yvette Z. Szabo, Sheila Frankfurt, A. Solomon Kurz, Austen Anderson and Adam P. McGuire (Psychological Trauma: Theory, Research, Practice, and Policy, Advanced Online Publication, Oct 18, 2021, np). In the article (https://doi.org/10.1037/tra0001143), the Supplemental materials link was missing from the title page. All versions of this article have been corrected. (The following abstract of the original article appeared in record 2021-95013-001.) Objective: Posttraumatic stress disorder (PTSD) is a common problem for veterans. Resilience, the tendency to bounce back from difficult circumstances, is negatively associated with posttraumatic cognitions (PTCs) among individuals with a history of trauma, and it may be important to understand responses to trauma reminders.
Method: Using a quasi-experimental design, we examined the association between trait resilience and state PTCs in veterans with PTSD (n = 47, Mage = 48.60, 91.8% male) at two points: following a written trauma narrative exposure (Time 1 [T1]), and following a subsequent positive distraction task (i.e., brief, positive video; Time 2 [T2]).
Results: After controlling for PTSD symptom severity and combat exposure, resilience was negatively associated with PTCs at T1 (ΔR2 = .19) and T2 (ΔR2 = .13). However, resilience was a poor predictor of change in PTCs from T1 to T2. We also examined the relationship between resilience and subtypes of PTCs: resilience was associated with negative views of the self (T1, ΔR2 = .24) but not negative views of the world or self-blame (T1, ΔR2s ≤ .07); these results were consistent at T2.
Conclusions: Thus, resilience may attenuate negative trauma-related cognitions after trauma recall; however, this study was not designed to test causal pathways. Future research could examine whether resilience-building exercises reduce negative PTCs after trauma reminders among veterans. Additional research is needed to generalize to other trauma-exposed populations. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
{"title":"Resilience predicts posttraumatic cognitions after a trauma reminder task and subsequent positive emotion induction among veterans with PTSD. Correction to Szabo et al. (2022).","authors":"","doi":"10.1037/tra0001274","DOIUrl":"10.1037/tra0001274","url":null,"abstract":"<p><p>Reports an error in \"Resilience predicts posttraumatic cognitions after a trauma reminder task and subsequent positive emotion induction among veterans with PTSD\" by Yvette Z. Szabo, Sheila Frankfurt, A. Solomon Kurz, Austen Anderson and Adam P. McGuire (<i>Psychological Trauma: Theory, Research, Practice, and Policy</i>, Advanced Online Publication, Oct 18, 2021, np). In the article (https://doi.org/10.1037/tra0001143), the Supplemental materials link was missing from the title page. All versions of this article have been corrected. (The following abstract of the original article appeared in record 2021-95013-001.) Objective: Posttraumatic stress disorder (PTSD) is a common problem for veterans. Resilience, the tendency to bounce back from difficult circumstances, is negatively associated with posttraumatic cognitions (PTCs) among individuals with a history of trauma, and it may be important to understand responses to trauma reminders.</p><p><strong>Method: </strong>Using a quasi-experimental design, we examined the association between trait resilience and state PTCs in veterans with PTSD (n = 47, Mage = 48.60, 91.8% male) at two points: following a written trauma narrative exposure (Time 1 [T1]), and following a subsequent positive distraction task (i.e., brief, positive video; Time 2 [T2]).</p><p><strong>Results: </strong>After controlling for PTSD symptom severity and combat exposure, resilience was negatively associated with PTCs at T1 (ΔR2 = .19) and T2 (ΔR2 = .13). However, resilience was a poor predictor of change in PTCs from T1 to T2. We also examined the relationship between resilience and subtypes of PTCs: resilience was associated with negative views of the self (T1, ΔR2 = .24) but not negative views of the world or self-blame (T1, ΔR2s ≤ .07); these results were consistent at T2.</p><p><strong>Conclusions: </strong>Thus, resilience may attenuate negative trauma-related cognitions after trauma recall; however, this study was not designed to test causal pathways. Future research could examine whether resilience-building exercises reduce negative PTCs after trauma reminders among veterans. Additional research is needed to generalize to other trauma-exposed populations. (PsycInfo Database Record (c) 2022 APA, all rights reserved).</p>","PeriodicalId":73837,"journal":{"name":"Journal of molecular graphics","volume":"5 1","pages":"S108"},"PeriodicalIF":6.3,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75402134","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}
The most recent tools that have been developed for modeling the three-dimensional features of polysaccharides and carbohydrate polymers are presented. The presentation starts with a description of the conformations of the monosaccharides, and of the flexible rings such as in the case of five-membered rings, and a thorough description of the conformational space that is available for a disaccharide unit, either in vacuo or in an aqueous phase. The extension to the modeling of the parent polysaccharides is addressed, based on the assumption that owing to the size and relative rigidity of the intervening monosaccharides units, the rotations at a particular linkage can be, under some conditions, considered as independent of nearest neighbor interactions. Appropriate modeling techniques are described that can provide insights into the dimensions of the chain in a solution which is best described as a random coil accompanied by the occurrence of local “helical” regions. With the help of such descriptors such as helical parameters, the ordered state of polysaccharide strands can be readily characterized. The generation of double or triple helices can be then attempted in order to explore the occurrence of such multistranded arrangements that may be energetically stable. The final step in the determination of the structure of polysaccharides in the ordered state, is the investigation of the interactions of different helices. This may lead to either the best arrangement(s) between two polymeric chains, or to the prediction of the dimensions, and the symmetry of a three-dimensional lattice. Some of the tools which have been developed should allow automatic scarches for meaningful correlations between structures and functions, through exploratory data analysis. Structure-function or structure-property correlation could be then used to model changes arising from structural alterations. This would open the field of polysaccharide engineering.
{"title":"Modeling polysaccharides: Present status and challenges","authors":"Serge Pérez , Milou Kouwijzer , Karim Mazeau , Søren Balling Engelsen","doi":"10.1016/S0263-7855(97)00011-8","DOIUrl":"10.1016/S0263-7855(97)00011-8","url":null,"abstract":"<div><p>The most recent tools that have been developed for modeling the three-dimensional features of polysaccharides and carbohydrate polymers are presented. The presentation starts with a description of the conformations of the monosaccharides, and of the flexible rings such as in the case of five-membered rings, and a thorough description of the conformational space that is available for a disaccharide unit, either <em>in vacuo</em> or in an aqueous phase. The extension to the modeling of the parent polysaccharides is addressed, based on the assumption that owing to the size and relative rigidity of the intervening monosaccharides units, the rotations at a particular linkage can be, under some conditions, considered as independent of nearest neighbor interactions. Appropriate modeling techniques are described that can provide insights into the dimensions of the chain in a solution which is best described as a random coil accompanied by the occurrence of local “helical” regions. With the help of such descriptors such as helical parameters, the ordered state of polysaccharide strands can be readily characterized. The generation of double or triple helices can be then attempted in order to explore the occurrence of such multistranded arrangements that may be energetically stable. The final step in the determination of the structure of polysaccharides in the ordered state, is the investigation of the interactions of different helices. This may lead to either the best arrangement(s) between two polymeric chains, or to the prediction of the dimensions, and the symmetry of a three-dimensional lattice. Some of the tools which have been developed should allow automatic scarches for meaningful correlations between structures and functions, through exploratory data analysis. Structure-function or structure-property correlation could be then used to model changes arising from structural alterations. This would open the field of polysaccharide engineering.</p></div>","PeriodicalId":73837,"journal":{"name":"Journal of molecular graphics","volume":"14 6","pages":"Pages 307-321"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0263-7855(97)00011-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20141670","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 : 1996-12-01DOI: 10.1016/S0263-7855(97)00007-6
Hanqing Wu
A universal EPR simulation program has been created by the author, which is based on the following spin Hamiltonian equation: where D and e are the axial and rhombic zero-field splitting parameters, respectively. The program can be used for simulation of EPR spectra with half-integer electronic spin (, n = 3, 5, 7, 9) systems. In this article, the integer spin (, n = 2, 4) systems are also considered. The EPR simulation results show that when D > frequency, no EPR signal can be seen from EPR simulation; when D ≈ frequency, whichever X/Q/W-band is used, the EPR signal can be seen on the basis of the simulated EPR results presented.
{"title":"Why spin = 1, 2 species have no electron paramagnetic resonance signal under normal conditions: Possible detection by electron paramagnetic resonance at frequency close to D value?","authors":"Hanqing Wu","doi":"10.1016/S0263-7855(97)00007-6","DOIUrl":"10.1016/S0263-7855(97)00007-6","url":null,"abstract":"<div><p>A universal EPR simulation program has been created by the author, which is based on the following spin Hamiltonian equation: <span><math><mtext>H = gβB · S + D{S</mtext><msub><mi></mi><mn>z</mn></msub><msup><mi></mi><mn>2</mn></msup><mtext> − </mtext><mtext>S(S + 1)</mtext><mtext>3</mtext><mtext>} + E(S</mtext><msub><mi></mi><mn>x</mn></msub><msup><mi></mi><mn>2</mn></msup><mtext> − S</mtext><msub><mi></mi><mn>y</mn></msub><msup><mi></mi><mn>2</mn></msup><mtext>)</mtext></math></span> where <em>D</em> and <em>e</em> are the axial and rhombic zero-field splitting parameters, respectively. The program can be used for simulation of EPR spectra with half-integer electronic spin (<span><math><mtext>S = </mtext><mtext>n</mtext><mtext>2</mtext></math></span>, <em>n</em> = 3, 5, 7, 9) systems. In this article, the integer spin (<span><math><mtext>S = </mtext><mtext>n</mtext><mtext>2</mtext></math></span>, <em>n</em> = 2, 4) systems are also considered. The EPR simulation results show that when <em>D</em> > frequency, no EPR signal can be seen from EPR simulation; when <em>D</em> ≈ frequency, whichever X/Q/W-band is used, the EPR signal can be seen on the basis of the simulated EPR results presented.</p></div>","PeriodicalId":73837,"journal":{"name":"Journal of molecular graphics","volume":"14 6","pages":"Pages 328-330"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0263-7855(97)00007-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20141672","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 : 1996-12-01DOI: 10.1016/S0263-7855(97)89631-2
{"title":"Modelling of intercalcated montmorillonites","authors":"","doi":"10.1016/S0263-7855(97)89631-2","DOIUrl":"https://doi.org/10.1016/S0263-7855(97)89631-2","url":null,"abstract":"","PeriodicalId":73837,"journal":{"name":"Journal of molecular graphics","volume":"14 6","pages":"Pages 381-382"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0263-7855(97)89631-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91590615","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 : 1996-12-01DOI: 10.1016/S0263-7855(96)90049-1
{"title":"Mac version of Accord free!","authors":"","doi":"10.1016/S0263-7855(96)90049-1","DOIUrl":"https://doi.org/10.1016/S0263-7855(96)90049-1","url":null,"abstract":"","PeriodicalId":73837,"journal":{"name":"Journal of molecular graphics","volume":"14 6","pages":"Pages 386-387"},"PeriodicalIF":0.0,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0263-7855(96)90049-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91634171","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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