bluuebunny/crossref_metadata_2025_split huggingface dataset:
Biomechanical Evaluation of Cortical Bone and Traditional Trajectories for Lumbar Single Level Segment Fixation
Authors: Dai Yuan , Jiang Jianyuan , Shao Minghao , Lu Feizhou 
Published: February 2021

Abstract
Background: The aim of this study was to evaluate the biomechanical stability of a lumbar internal fixation system with 3 different fixation techniques by the establishment of a three-dimensional finite element (FE) model of lumbar single level fixation.Methods: A three-dimensional osseoligamentous nonlinear FE model of osteoporosis lumbar 4-5 (male, aged 57 years, height 170 cm, weight 70 kg, bone mineral density T value -2.8SD) was built to detect the biomechanical stability of an internal fixation system with the following 3 screw trajectories: traditional pedicle screw trajectory fixation (TT), cortical bone trajectory (CBT) screw and hybrid pedicle screw fixation (CBT + TT). The location and area of maximal equivalent stress and the angular displacement of this lumbar model with different screw trajectories were measured in anterior bending, posterior extension, lateral bending and during rotation.Results: The angular displacement of this lumbar model with the 3 different screw trajectories was similar, all of which could restrict the angular displacement of lumbar vertebrae. The maximal equivalent stress was located at the border of the CBT screw and rod, with the hybrid screw fixation technique in axial rotation. Conclusion: The use of CBT and TT screws in lumbar internal fixation had similar stability. The CBT screw could be an alternative solution to lumbar short-segmented fixation, but temporary immobilization would be required to avoid the failure of CBT screw fixation due to the increasing stress in position of extensive lateral bending and rotation.
Knowledge and Perceptions of Preconception Care Among Health Workers and Women of Reproductive Age in Mzuzu City, Malawi. A Cross-sectional Study
Authors: Munthali-Nkhoma Mtondera Eness , Kazanga-Chiumia Isabel , Mandiwa Chrispin , Mwale Saul 
Published: February 2021

Abstract
Background: Preconception care is one of the preventive strategies in maternal and new-born health as recommended by WHO. However, in sub-Saharan Africa there is poor preconception care practices. This study examined knowledge and perceptions of preconception care among health workers and women of reproductive age group in Mzuzu city, Malawi. Methods: A descriptive cross-sectional mixed methods approach utilizing quantitative and qualitative methods was employed. Selection of respondents was done through a multistage and purposive sampling techniques. A total of 253 women of reproductive age from 9 townships of Mzuzu City responded to the questionnaire and 20 health workers were interviewed.Results: Of the 253 women, 57.7% (n =146) demonstrated a good level of knowledge of preconception care while 42.3 % (n =107) had poor knowledge level. About 72% (n =105) of those with good level of knowledge lacked awareness on possibilities of talking to a health care provider on intentions of getting pregnant. About 74.7 % (n =189) of women had a positive perception towards preconception care. Knowledge level of women was a good predictor of positive perception (AOR = 2.5; 95% CI = 1.215 – 5.023), however its prediction capacity varied with the academic level attained. Those with secondary (AOR =10.2; 95% CI = 3.285 - 26.276) and tertiary (AOR=2.3; 95% CI = 1.146 – 4.952) were more likely to have good knowledge than those with primary school level education. About 95% (n =19) of health workers lacked details about preconception care but they admitted their role in preconception care.Conclusion: Preconception care practice among health workers and women of reproductive age in Mzuzu City is low but there is positive perception towards preconception care among both parties. There is an opportunity in existing platforms for implementation of interventions targeting identified predictors for increased knowledge and uptake of preconception care.
The Effect of Bone Marrow-Derived Mesenchymal Stem Cells Co-transplantation with Hematopoietic Stem Cells on Liver Fibrosis Alleviation and Survival in Patients with Class III β-thalassemia Major
Authors: Rostami Tahereh , Kasaeian Amir , Maleki Nasrollah , Nikbakht Mohsen , Kiumarsi Azadeh , Tavangar Seyed Mohammad , Taheri Amir Pejman Hashemi , Mousavi Seied Aasadollah , Ghavamzadeh Ardeshir 
Published: February 2021

Abstract
Background: Hepatic fibrosis is a common complication in transfusion-dependent thalassemia patients. Data on the co-transplantation of mesenchymal stem cells (MSCs) with hematopoietic stem cells (HSCs) in beta-thalassemia major (BTM) patients are scarce. Therefore, we aimed to evaluate the effect of co-transplantation of bone marrow-derived MSC with HSCs on the liver fibrosis alleviation and transplant outcomes in class III BTM.Methods: Between April 1998 and January 2017, a total of 224 consecutive patients with class III BTM underwent allogeneic HSCT in the Research Institute for Oncology, Hematology and Cell Therapy, Tehran University of Medical Sciences, Tehran, Iran. To assess liver fibrotic changes after transplantation, 47 patients participated in the MSC plus HSC group and 30 patients in the HSC only group at the end of the follow-up period. All patients underwent laboratory tests, especially serum ferritin and liver function testing, hepatic T2* MRI, liver biopsy, and FibroScan before and two years after transplantation. Kaplan–Meier curves were derived to determine survival, and were compared using the log-rank test. Repeated-measure, mixed-effect linear regression models were used to examine changes in liver fibrosis over time.Results: The 10-year OS rate was 71.84% in the mesenchymal group and 61.89% in the non-mesenchymal group (P-value = 0.294), while the 10-year TFS rate was 63.64% in the mesenchymal group and 52.78% in the non-mesenchymal group (P-value = 0.285). No significant difference was observed in the 10-year NRM, rejection rate, ANC engraftment, platelet engraftment, acute GvHD, and chronic GvHD between the two groups. In addition, the results of repeated-measure, mixed-effect linear regression models showed that none of the variables determining hepatic fibrosis had a significant difference between patients receiving MSCs and patients who did not receive MSCs.Conclusions: Based on the results of this study, the co-transplantation of bone marrow-derived MSCs and HSCs to patients with class III beta-thalassemia major could not significantly improve the liver fibrosis alleviation and transplantation outcomes, including OS, TFS, TRM, rejection rate, ANC engraftment, platelet engraftment, acute GvHD, and chronic GvHD.
Open-Circuit Photovoltage Measurements Towards Determination of the Quintessential Features of Metal Titanates in Photo(Electro)catalytic Applications
Authors: Wojtyła Szymon , Baran Tomasz 
Published: February 2021

Abstract
Conduction band potential is one of the most crucial physicochemical properties of semiconductor towards photocatalytic and photoelectrochemical aplications. Inexpensive home-made Arduino devices is proposed for determination of flat band potential, based on the well-established method: open-circuit photovoltage measurements. To verify proposed measurement procedure, series of titanates has been prepared by a straightforward hydrothermal procedure and characterized – band structure of materials has been determined, in terms of band gap energy and conduction band edge potential. Finally we demonstrated the photocatalytic formation of superoxide anion radical. Interestingly, the efficiency of O2-• can be correlated, in part, with the potential of conduction band edge. Photocatalyst characterized by particularly low potential of conduction band edge can generate the superoxide anion radical with highest efficiency.
"Association Between Dietary Inflammatory Index (DII) and Risk of Irritable Bowel Syndrome: A Case-Control Study"
Authors: Eslampour Elham , Ghanadi Koroush , Aghamohammadi Vahideh , Kazemi Alireza Moayed , Mohammadi Rasool , Vahid Farhad , Abbasnezhad Amir 
Published: February 2021

Abstract
BackgroundPathophysiology of IBS is not well recognized; however, several studies have shown the possible relationship between diet and risk of IBS. We assessed the ability of the dietary inflammatory index (DII) to predict the risk of IBS.MethodsThe subjects were 155 IBS cases and 310 age- and sex-matched healthy controls. IBS was recognized using the Rome IV criteria. DII score was computed based on dietary intake using a 168-item FFQ. The FFQ was analyzed using Nutritionist ІV. The DII score was calculated based on energy-adjusted amounts of nutrients using residual method. Logistic regression models were used to estimate multivariable odds ratios (ORs).ResultsThe mean DII score was significantly higher among IBS patients in comparison to healthy controls (0.78 ± 2.22 vs. -0.39 ± 2.27). In crude model, increase in DII as continuous variable was associated with a significant increase in the risk of IBS (OR (95% CI): 1.26 (1.1-15.38)). Furthermore, the association remained significant even after adjusting for age and sex (OR (95% CI): 1.28 (1.1-17.41)) and after multivariate adjustment (OR (95% CI): 1.38 (1.2-1.56)). In crude, age and sex adjusted and multivariate-adjusted models subjects in fourth quartile of DII had higher OR in comparison to subjects in first quartile. ConclusionsThe results of this study showed a possible positive association between a pro-inflammatory diet and the risk of IBS. Thus, encouraging intake of more anti-inflammatory dietary factors and reducing intake of pro-inflammatory factors may be a strategy for reducing risk of IBS.
Genome-based Classification of the Streptomyces Violaceusniger Clade and Description of Streptomyces Sabulosicollis sp. nov. from an Indonesian Sand Dune
Authors: Kusuma Ali Budhi , Nouioui Imen , Goodfellow Michael 
Published: February 2021

Abstract
A polyphasic study was designed to determine the taxonomic provenance of a strain, isolate PRKS01-29 T , recovered from an Indonesian sand dune and provisionally assigned to the Streptomyces violaceusniger clade. Genomic, genotypic and phenotypic data confirmed this classification. The isolate formed an extensively branched substrate mycelium which carried aerial hyphae that differentiated into spiral chains of rugose ornamented spores, contained LL-as the wall diaminopimelic acid, MK-9 (H 6 , H 8 ) as predominant isoprenologues, phosphatidylethanolamine as the diagnostic phospholipid and major proportions of saturated, iso - and antesio - fatty acids. Whole-genome sequences generated for the isolate and Streptomyces albiflaviniger DSM 41598 T and Streptomyces javensis DSM 41764 T were compared with phylogenetically closely related strains, the isolate formed a branch within the S. violaceusniger clade in the resultant phylogenomic tree. Genomic data showed that isolate PRKS01-29 T was most closely related to the S. albiflavinger strain but was distinguished from the latter and from other members of the clade using combinations of phenotypic properties and low average nucleotide identity and digital DNA:DNA hybridization scores. Consequently, it is proposed that isolate PRKS01-29 T (=CCMM B1303 T = ICEBB-02 T = NCIMB 15210 T ) should be classified in the genus Streptomyces as Streptomyces sabulosicollis sp. nov. It is also clear that streptomycetes which produce spiral chains of rugose ornamented spores form a well-defined monophyletic clade in the Streptomyces phylogenomic tree., the taxonomic status of which requires further study. The genome of the type strain of S. sabulosicollis contains biosynthetic gene clusters predicted to produce new natural products.
Measurement of Phthalate Acid Esters in Non-alcoholic Malt Beverages by MSPE-GC/MS Method in Tehran City: With the Approach of Chemometric
Authors: Rezaei Hana , Moazzen Mojtaba , Shariatifar Nabi , Khaniki Gholamreza Jahed , Dehghani Mohammad Hadi , Arabameri Majid , Alikord Mahsa 
Published: February 2021

Abstract
The goal of this research was to assess the phthalic acid esters (DEP, DMP, BBP, DBP, DEHP, DnOP and total PAE) in non-alcoholic malt beverages bottled by multi-walled carbon nanotubes were magnetized with iron (MWCNT-Fe3O4) using Mass spectrometry is gas chromatography (GC-MS) in Tehran .The results showed that the mean of DEHP (which has also been found to be carcinogenic) in all samples was lower than the standard leveles (5944.73 ng/l). The maximum concentration of DEHP in four samples was upper than the standard levels (8957.87 ng/l). Also, scanning electron microscopy (SEM), scattered energy X-ray (EDX) and X-ray diffraction (XRD) analysis were used to describe the generated MWCNT-Fe3O4. Multivariate techniques and heat-map visualization were used to assess the correlation among the type and levels of PAEs with brand, color, product date, pH, sugar, volume and gas pressure. Therefore, based on heat-map and principal component analysis (PCA) results, the Bis (2- ethyl hexyl) phthalate (DEHP) and total PAEs were the closest accessions, indicating that these variables had similar trends. Based on the results, it can be stated that due to the low average of total phthalate esters in non-alcoholic malt beverages, there is no serious health hazard of these compounds for humans.
Do Saharan Dust Intrusions Affect the Incidence and Severity of COVID-19 in Spain?
Authors: Linares Cristina , Culqui Dante , Belda Fernando , López-Bueno José Antonio , Luna Yolanda , Sánchez-Martínez Gerardo , Hervella Beatriz , Diaz Julio 
Published: February 2021

Abstract
Scientific evidence suggests that Saharan dust intrusions in Southern Europe contribute to the worsening of multiple pathologies and increase the concentrations of particulate matter (PM) and other pollutants. However, few studies have examined whether Saharan dust intrusions influence the incidence and severity of COVID-19 cases. To address this question, in this study we carried out generalized linear models with Poisson link between incidence rates and daily hospital admissions and average daily concentrations of PM10 and NO2 in nine Spanish regions for the period from February 1, 2020 to May 31, 2020. The models were adjusted by maximum daily temperature and average daily absolute humidity. Furthermore, we controlled for trend, seasonality and the autoregressive nature of the series. The variable relating to Saharan dust intrusions was introduced using a dichotomous variable, NAF, averaged across daily lags in ranges of 0–7 days, 8–14 days, 14–21 days and 22–28 days. The results obtained in this study suggest that chemical air pollutants, and especially NO2, are related to the incidence and severity of COVID-19 in Spain. Furthermore, Saharan dust intrusions have an additional effect beyond what is attributable to the variation in air pollution; they are related, in different lags, to both the incidence and hospital admissions rates for COVID-19. These results serve to support public health measures that minimize population exposure on days with particulate matter advection from the Sahara.
A Systematic Review of the Relationship between Normal Range of Serum Thyroid-stimulating Hormone and Bone Mineral Density in the Postmenopausal Women
Authors: Zhu Xiaoli , Li Man , Li Shugang , Hu Yifei 
Published: February 2021

Abstract
Objective Considering the fact that the relationship between serum thyroid-stimulating hormone and bone mineral density in postmenopausal women is still controversial, this study adopts meta-analysis in evaluating the correlation between TSH and BMD, as well as osteoporosis in the postmenopausal women with normal thyroid function. Methods Cochrane Library, PubMed, VIP, Web of Science, Wan Fang Data, and CNKI databases were searched for articles concerning correlation between TSH and BMD in postmenopausal women. The retrieval time was set from the date of database establishment to November 30, 2020. Revman5.3 and Stata12.0 software were used for meta-analysis. Results A total of 19 articles were incorporated, including 9 articles describing the correlation coefficient (r) between TSH and BMD covering 2,573 subjects; 10 articles reflecting the risk of OP and TSH with 21,387 subjects in total; 4 articles that included in the study reflecting the mean BMD with 1,310 individuals. The Summary Fisher’ Z of the correlation between TSH and BMD was 0.16, 95% CI (0.00, 0.32), and the correlation coefficient of Summary Fisher’ Z conversion was 0.158. Study on the relationship between TSH and osteoporosis based on OR demonstrated that the combined OR was 1.76, 95% CI (1.27, 2.45), P<0.05. The BMD of group with low TSH was lower than that of the control group, SMD at -0.31, 95% CI (-0.44, -0.18), P<0.001. The BMD of group with high TSH was higher than that of the control group, SMD at 0.22, 95% CI (0.08, 0.35), P=0.001. The subgroup analyzing results displayed that the risk of osteoporosis of the subjects from community with low TSH was 1.89, 95% CI (1.43, 2.49), P<0.01. The risk of osteoporosis for subjects with low TSH and from hospitals was 1.36, 95% CI (0.46, 3.99), P=0.58; 1.84 for subjects with low TSH and anti-osteoporosis drugs, 95% CI (1.05, 3.22), P=0.03; and 1.74 for those with low TSH but not taking anti-osteoporosis drugs, 95% CI (1.08, 2.82), P=0.02. The dose-response relationship showed that the risk of osteoporosis tended to decrease when TSH was more than 2.5mIu/L. Conclusion The serum TSH is positively related with BMD in postmenopausal women, and high TSH (>2.5 mIu/L) within the normal range is possibly helpful to decrease the risk of osteoporosis in postmenopausal women.
An Influence of Slag Refining on the Structure and Mechanical Properties of the Brass CuZn39Pb2
Authors: Jenek Mariusz , Shlafka Paweł 
Published: February 2021

Abstract
The results presented in the dissertation show the influence of a kind and concentration of the flux added during the process of the lead brass smelting on its structure, chemical composition and mechanical properties – hardness and strength. A positive i refining, structure, mechanical properties, brassnfluence of the refining and modification process manifested in an improvement of mechanical properties as well as an increase of the structure, chemical composition and mechanical properties homogeneity in the entire volume of the ingot has been proven.
Physiological Responses of Agriophyllum Squarrosum and Setaria Viridis to Drought and Re-watering
Authors: Chen Juanli , Zhao Xueyong , Li Yuqiang , Luo Yongqing , Zhang Yaqiu , Liu Mei , Li Yan 
Published: February 2021

Abstract
The drought resistance of psammophytes determines their survival and growth under natural conditions or after transplanting. However, their responses to drought are not well understood. Agriophyllum squarrosum is a pioneer psammophyte in Horqin sandy land’s vegetation community, and Setaria viridis is the climax species. We conducted a pot experiment with both species to study how their physiological characteristics respond to drought and rehydration. We found that watering to 60 and 65% of field capacity (the control) provided more water than was required by A. squarrosum, and its leaves became yellow and slightly wilted. The total chlorophyll content and Fm (maximum fluorescence after dark adaptation) were lower than in the drought treatment, and both decreased after rehydration. With increasing drought duration, the chlorophyll content and Fm of A. squarrosum under moderate and severe drought first increased and then decreased, malondialdehyde levels and membrane permeability increased, but the quantum efficiency of photosystem II (Fv/Fm) decreased. With increasing drought duration and intensity, the relative water content (RWC), chlorophyll content, Fm, and Fv/Fm of S. viridis decreased, but malondialdehyde levels and membrane permeability increased. During the late drought period, levels of A. squarrosum’s three antioxidant enzymes increased to prevent membrane lipid peroxidation; for S. viridis, only peroxidase and superoxide dismutase levels increased. After rehydration, RWC of both plants increased, but the chlorophyll content decreased. Fv/Fm of A. squarrosum and Fm of S. viridis did not recover after severe drought. Our results provide insights into psammophyte adaptation to drought stress to support ecological restoration and reconstruction.
Value of Skin Tests for Managing Hypersensitivity Reactions to Platinum Salts
Authors: Pedraza-Nieto Laura , Beunza-Sola Monica , Rodríguez Cesar A , Moreno Esther , Otero María José 
Published: February 2021

Abstract
Background: Platinum-based therapy continues to be one of the pillars of the treatment of different types of cancer. However, many times the responsible clinician renounces its use after the appearance of a hypersensitivity reaction.Objective: To assess the value of skin tests (ST) in clinical practice to address the treatment of patients with suspicion of immediate hypersensitivity reactions (HSRs) to platinum salts.Methods: Single-center retrospective study performed for 3 years. Adult patients treated with any platinum salt who experienced HSR symptoms and for whom an oncologist requested ST, were included. ST with cisplatin, carboplatin and oxaliplatin were performed. Results: Twenty-two patients were included. ST were positive in 12 patients (54.5%), of which 4 (33%) presented cross-reactivity to another platinum salt. Fifteen patients continued platinum-based chemotherapy: 9 patients with positive ST (4 continued by desensitization and 5 with another platinum) and 6 patients with negative ST, of which 1 repeated an HSR. A NPV of 0.91 was calculated. Conclusion: ST allowed accurate identification of platinum allergy patients and the resumption of platinum-based therapy in many patients for whom no suitable therapeutic alternative was clinically acceptable.
Study of Fitch Rating`s Response to Covid-19 by Logical Analysis of Data
Authors: Gholipour Elnaz , Vizvari Prof.Dr Bela 
Published: February 2021

Abstract
Credit ratings, represent the creditworthiness of countries and financial organizations that nowadays due to the corona virus crisis hit the world is being threatened to be downgraded. This study uses Logical Analysis of Data to analyze the Fitch rating agency response to Covid-19. Three varied parts of variables, composed of the significant economic and social factors, pandemic -related variables and pre-credit rating (2019) are under survey. The time interval of the study is 2019-2020. The output of the research in the form of the decision trees shows the selected patterns of each newly published Fitch rating in July of 2020. The consequences of the research in training and test sets by 100% and 80% matched cases, respectively shed light on the robust results of explored patterns. Surveying on Fitch`s response in this span showed that pandemic-related variables mostly have an impact on “B” classes and they were not significant in “investment grades” (AAA-BBBP), whereas, 2019`s credit rating may be a strong factor to forecast next ratings just in normal state of affairs, nevertheless, selected well-built economic and social factors described the hidden structure of Fitch Agency in the optimum way during pandemic also.