bluuebunny/crossref_metadata_2025_split huggingface dataset:
Affine connection representation of gauge fields
Authors: Man Zhao-Hui 
Published: August 2021

Abstract
There are two ways to unify gravitational field and gauge field. One is to represent gravitational field as principal bundle connection, and the other is to represent gauge field as affine connection. Poincar{\'{e}} gauge theory and metric-affine gauge theory adopt the first approach. This paper adopts the second. In this approach:(i) Gauge field and gravitational field can both be represented by affine connection; they can be described by a unified spatial frame.(ii) Time can be regarded as the total metric with respect to all dimensions of internal coordinate space and external coordinate space. On-shell can be regarded as gradient direction. Quantum theory can be regarded as a geometric theory of distribution of gradient directions. Hence, gauge theory, gravitational theory and quantum theory obtain the same geometric foundation and a unified description of evolution.(iii) Coupling constants, chiral asymmetry, PMNS mixing and CKM mixing arise spontaneously as geometric properties in affine connection representation, so they are not necessary to be regarded as direct postulates in the Lagrangian anymore.(iv) The unification theory of gauge fields that are represented by affine connection can avoid the problem that a proton decays into a lepton in theories such as $SU(5)$.(v) There exists a geometric interpretation to the color confinement of quarks.In the affine connection representation, we can get better interpretations to the above physical properties, therefore, to represent gauge fields by affine connection is probably a necessary step towards the ultimate theory of physics.
The Effect of Smoking on Progression From Ductal Carcinoma in Situ to Invasive Ductal Carcinoma: A Retrospective Study
Authors: Takada Koji , Kashiwagi Shinichiro , Asano Yuka , Goto Wataru , Kouhashi Rika , Yabumoto Akimichi , Morisaki Tamami , Shibutani Masatsune , Takashima Tsutomu , Fujita Hisakazu , Hirakawa Kosei , Ohira Masaichi 
Published: August 2021

Abstract
Background: If ductal carcinoma in situ (DCIS) is diagnosed by histological examination such as core needle biopsy or vacuum-assisted biopsy (VAB), invasion is often found by removing the entire tumor and performing pathological examination. According to a meta-analysis, the rate of invasion found by postoperative pathological examination is about 25%. Smoking is a risk factor for carcinogenesis in various carcinomas, including breast cancer. We examined the correlation between the risk of invasion found by postoperative pathology and smoking history in patients who were diagnosed with DCIS by preoperative biopsy.Methods: In this study, we examined 128 patients who were diagnosed with DCIS by preoperative biopsy. Before the biopsy, all patients were asked about the duration of smoking, number of cigarettes smoked per day, and whether they were currently smoking. The data were used to calculate each patient’s tobacco exposure based on pack-years. The statistical analyses included the Pearson’s chi-square test and logistic analysis. Multivariate analysis was performed on the risk factors for invasion diagnosed by postoperative pathological examination in all cases diagnosed with DCIS by preoperative biopsy.Results: Of all the patients included in this study, 107 (83.5%) never smoked, which represented the majority, while 8 patients (6.3%) smoked at diagnosis with DCIS, and 13 (10.2%) had quit smoking before diagnosis. Tobacco exposure was 10 or less pack-years for 11 patients (8.6%) and more than 10 pack-years for 10 patients (7.8%). Number of pack-years was not an independent factor (p=0.349, odds ratio [OR]=0.329), but current smoker status (p=0.006, OR=not calculable) was an independent factor with VAB (p=0.018, OR=0.327).Conclusions: This study suggests that tobacco components may have an influence on the progression from DCIS to invasive ductal carcinoma.
Medical Students in Russia Evaluate the Training During the COVID-19 Pandemic: A Student Survey
Authors: Mukharyamova Laysan , Ziganshina Arina , Zhidjaevskij Aleksandr , Galimova Liana , Kuznetsov Maksim 
Published: August 2021

Abstract
Background

The aim of the study was to obtain feedback from medical students in Russia regarding their e-learning experience during COVID-19 Pandemic.
Methods

13 040 students from 46 Medical Schools in Russia completed an original evaluation form validated by 6 experts. Criterion and construct validity were determined in a pilot study (n = 46). The study design was based on the use of Google forms. Participants used the Visual Analog Scale from 1 to 10 to assess the level of knowledge acquired.
Results

95.31% of medical schools in Russia switched to e-learning during the Pandemic. 39.8% of the students stated that the time to prepare for the class has doubled. For 19.9% of them, it increased by one third, while 26.6% did not report any changes. 38,4% of the participants are satisfied with particular elements of e-learning, 27.5% like such a format, 22.9% do not like it, and 11.2% could not answer the question. The average scores for the knowledge assessment were 5.9 for the humanities, 6.1 for fundamental science, and 6.0 for clinical training.
Conclusions

Remote learning was described by medical undergraduates in Russia as the increase in self-instruction time and the decrease in the level of knowledge gained. Only particular components of the “new normal” can be considered for use beyond the pandemic.
Photocatalytic Detoxification of Antibiotic- and Bacteria-Contaminated Water using Cobalt-Doped Ni–Zn Ferrites Magnetic Separable Nanopowders
Authors: Mustafa Faisal Suleiman , Oladipo Akeem Adeyemi , Mizwari Zirar M , Gazi Mustafa 
Published: August 2021

Abstract
Here, metronidazole (MZ) antibiotic degradation and bactericidal efficacy of Co–Ni0.5Zn0.5Fe2O4 (Co–NZF) with and without photoactivation by UV light is reported as a viable cost-competitive water disinfection solution. Co–NZF has a total pore volume of 0.298 cm3 g− 1, a specific surface area of 70.2 m2 g− 1 and sufficiently high magnetic properties (80.35 emu g− 1). After 360 min of UV–assisted irradiation at pH 3, 10 mg Co–NZF, and 4 mM H2O2, the maximum MZ degradation was reached (92.8%). The adsorption result of 10 mg Co–NZF in the dark for 12 h resulted in 70.2% MZ removal, whereas MZ self-degradation was significantly minimal in a blank trial. In the presence of interfering anions and very high molecular weight tylosin antibiotic, Co–NZF maintained 51.7–75.4% degradation efficiency. The effect of the Co–NZF dosage on the viability of Staphylococcus aureus and Escherichia coli strains showed that 15 mg of the catalyst was sufficient to cause bactericidal activity after 180 min in the presence of UV light, while 25 mg is needed under dark conditions. In addition, when compared to Escherichia coli strains, Co–NZF showed higher inhibition against Staphylococcus aureus in time-kill experiments under dose variation.
Disruption of Tomato TGS Machinery by ToLCNDV Causes Reprogramming of Vascular Tissue Specific TORNADO1 Gene Expression
Authors: Chowdhury Shreya , Basak Shrabani , Das Rohit , Mandal Arunava , Kundu Pallob 
Published: August 2021

Abstract
Leaf curl disease of tomato caused by Tomato Leaf Curl New Delhi Virus (ToLCNDV) inflicts huge economical loss. Disease symptoms resemble leaf developmental defects including abnormal vein architecture. Leaf vein patterning related TORNADO1 gene’s ( SlTRN1 ) transcript level is augmented in virus-infected leaves. To elucidate the molecular mechanism of the upregulation of SlTRN1 in vivo we have deployed SlTRN1 promoter-reporter transgenic tomato plants and investigated the gene’s dynamic expression pattern in leaf growth stages and infection. Expression of the gene was delimited in the vascular tissues and oppressed in growing leaves. Methylation-sensitive PCR analyses confirmed the accumulation of CHH methylation at multiple locations in the SlTRN1 promoter in older leaves. However, ToLCNDV infection reverses the methylation status and restores expression level in the leaf vascular bundle. The virus dampens the level of key maintenance and de novo DNA methyltransferases SlDRM5 , SlMET1 , SlCMT2 with concomitant augmentation of two DNA demethylases, SlDML1 and SlDML2 levels in SlTRN1 promoter-reporter transgenics. Transient overexpression of SlDML2 mimics the virus-induced hypomethylation state of the SlTRN1 promoter in mature leaves. Further, in line with the previous studies, we confirm the crucial role of viral suppressors of RNA silencing AC1 and AC4 proteins in promoting DNA demethylation and directing it to reinstate activated transcription of SlTRN1 in silenced tissues for possible modification of leaf venation architecture, leaf curling and easy vector acquisition of viral particles.
Topic overlap and research waste at the ‘Overviews of systematic reviews’ level: a meta-research study
Authors: Lunny Carole , Zhang Jia He , Chen Alyssa , Neelakant Trish , Shinger Gavindeep , Stevens Adrienne , Tasnim Sara , Sadeghipouya Shadi , Adams Stephen , Zheng Yi Wen , Lin Lester , Yang Pei Hsuan , Dosanjh Manpreet , Ngsee Peter , Ellis Ursula , Shea Beverley J. , Reid Emma K. , Wright James M. 
Published: August 2021

Abstract
Background
Multiple ‘overviews of reviews’ conducted on the same topic (“overlapping overviews”) represent a waste of research resources, and can confuse clinicians who are required to choose among competing treatments. We aimed to assess the frequency and characteristics of overlapping overviews.
Methods
MEDLINE, Epistemonikos and Cochrane databases were searched for overviews that: synthesised reviews of health interventions and conducted systematic searches. Overlap in topic was defined as: duplication of PICO elements, not representing an update of a previous overview, and not a replication. We also categorized the overviews as broad or narrow in scope.
Results
Of 541 overviews identified (2000–2018), 172 (32%) overlapped across similar PICO. The overlapping overviews fell within 13 WHO ICD-10 medical classifications and 63 topics. The overviews may have overlapped partially or completely, such that a similar portion, major component(s), or complete representation of an overview was duplicated. 149/172 (87%) overlapping overviews were characterized as broad in scope. Most frequently, broad overviews had targeted populations for which multiple interventions were addressed (44%), or least frequently, they had a targeted intervention for multiple populations (17%).
Conclusions
One third of overviews overlapped in content with a majority covering broad topic areas, and fewer considering subsets of the evidence. A multiplicity of overviews on the same topic adds to the ongoing waste of research resources, time and effort across medical disciplines. This study and the database of 172 overlapping overviews can provide a guide to authors about which topics are covered, and gaps in the evidence for future analysis.
Whole Genome Sequencing and Expression Analysis of ToxA in Bipolaris Sorokiniana Provides Discernment of Pathogenicity Causing Spot Blotch of Wheat
Authors: Aggarwal Rashmi , Agarwal Shweta , Sharma Sapna , Gurjar Malkhan Singh , Bashyal Bishnu Maya , Rao Atmakuri Ramakrishna , Sahu Sarika , Jain Prachi , Saharan Mahender Singh 
Published: August 2021

Abstract
Background: Spot blotch disease of wheat caused by Bipolaris sorokiniana Boerma (Sacc.) is an emerging problem in South Asian countries. In this study, whole genome of highly virulent isolate of Bipolaris sorokiniana (BS112) was sequenced, pathogenicity related gene(s) were identified and role of ToxA gene in spot blotch disease development was established.Results: Bipolaris sorokiniana isolate BS112 infecting wheat was sequenced using hybrid assembly approach. The assembly size of the genome was 35.64Mb (GenBank accession number RCTM00000000) with GC content of 50.2%, providing coverage of 97.6% on reference ND90Pr genome. Average gene density predicted was 250-300 genes/Mb. A total of 235 scaffolds were obtained using pyScaf assembler with N50 of 16,54,800 bp. In addition, 152 transcription factors involved in various biological processes were identified and a total of 682 secretory proteins were predicted using secretome analysis. ToxA gene (535bp) was analyzed and identified in the genome of B. sorokiniana which revealed 100% homology with ToxA gene of Pyrenophora tritici repentis. Further, ToxA gene was amplified, sequenced and validated in the 39 isolates of B. sorokiniana which confirmed the presence of ToxA gene in all the isolates of B. sorokiniana. All these ToxA sequences were submitted in NCBI database (MN601358-MN601396). As ToxA gene interacts with Tsn1 gene of host, 13 wheat genotypes were evaluated for the Tsn1 gene and five genotypes (38.4%) were found to be Tsn1 positive with more severe necrotic lesions compared to Tsn1 negative wheat genotypes. In vitro expression analysis of ToxA gene in B. sorokiniana isolate (BS112) using qPCR revealed maximum upregulation (14.67 fold) at 1st day after inoculation (DAI). Further, in planta expression analysis of ToxA gene in Tsn1 positive and Tsn1 negative genotypes, Agra local and Chiriya 7 respectively was also conducted. Results revealed maximum expression (7.89 fold) of ToxA gene in Tsn1 positive genotype, Agra local at 5th DAI compared to Tsn1 negative genotype Chiriya 7 which showed minimum expression (0.048 fold) at 5th DAI. Conclusions: Full genome of B. sorokiniana was sequenced; secreted proteins and virulence genes were identified in the genome. ToxA gene was validated in thirty nine isolates of B. sorokiniana. In planta ToxA-Tsn1 interaction studies established that spot blotch disease is more severe in Tsn1 positive genotypes. This genomic resource will provide a new insight into better understanding and management of spot blotch disease and B. sorokiniana of wheat.
Male involvement in family planning use and its determinants in Ethiopia. A systematic review and meta-analysis protocol
Authors: Anbesu Etsay Woldu , Aychiluhm Setognal Birara , Kahsay Znabu Hadush 
Published: August 2021

Abstract
Background
The need to include males that required joint spousal decision is critical in achieving key reproductive health indicators. Low involvement of males in family planning use is one of the contributing factors for low contraceptive use in Ethiopia. Despite this, there are inconsistent findings on the prevalence and determinates of males involvement in family planning use in Ethiopia. Thus, this systematic review and meta-analysis aimed to determine the pooled prevalence of mal involvement in family planning use and its determinants in Ethiopia.
Methods
The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guideline will be used to develop the protocol. Online databases PubMed, CINAHL, Google Scholar, and unpublished grey literature will be searched to retrieve available articles from April 10-August 11/2021. The two authors will conduct selection of studies, data extraction, and quality assessment. The quality of the studies will be assessed using Joanna Briggs Institute checklist. Chi-squared test and I-squared statistic will be used to examine heterogeneity among studies. Sources of heterogeneity will be investigated using subgroup analyses and meta-regression based on regions and residence (urban and rural). Publication bias will be examined by observation using funnel plots and statistically by Begg’s and Egger’s tests. A random-effect model will be used to estimate the pooled prevalence and its determinants of male involvement in family planning use.
Discussion
The role of the male in family planning and participation in contraceptive use improves women’s uptake and continuity of family planning use. Though there are studies on male involvement in family planning use, there is no synthesis research findings on the pooled prevalence of male involvement in family planning use and its determinants in Ethiopia. Therefore, the finding from this systematic review and meta-analysis will help the national health sector transformational plane to emphasize the pooled prevalence and its determinants that drive low male involvement in family planning use in Ethiopia.
Succession and Catabolic Properties of Fungal Community During Composting of Fruit Waste at Sub-Tropical Environment
Authors: Danish Syeda Abeer , Haq Tooba , Liaqat Irum , Rubab Saima , Qureshi Mohammad , Zafar Urooj 
Published: August 2021

Abstract
A comprehensive profile of structural and functional dynamics of fungal community during fruit waste composting was investigated. For this purpose, fruit waste was composted in a windrow setup. Representative samples were collected at varied range of incubation temperatures during composting period and employed to physicochemical and microbiological culture dependent and independent analysis. Time-series data revealed that variation in fungal load is temperature dependent that influenced morphotypes’ shifts during different stages of composting. Shifts in abiotic factors, availability of accessible nutrients, water loss, pH and electrical conductivity participated in the transition of community and compost maturity. Culture-based analysis showed rich microbial compost community, dominant with Aspergillus, Mucor, Rhizopus and Penicillium. Denaturing gradient gel electrophoresis analyses demonstrated the prevalence of diverse community in compost with detectable bands corresponding to Penicillium at mesophilic temperature while undetectable bands corresponding for Aspergillus. Succession in microbial community was observed during composting as with temperature variations. Illumina Miseq revealed fungal diversity including Mortierella sp from phylum Zygomycota as the most dominant fungi and Coprinopsis sp as second dominant from Basidiomycota, mainly associated with lignocellulosic degradation. Moreover, Aspergillus fumigatus (ADIF1) was found as the most promising cellulase and pectinase producers at higher temperature showing its potential for efficient environmental management utilization. Current findings suggest that transformation of fruit waste into seed germination friendly compost that can be used as an efficient organic fertilizer and incorporation of sensitive molecular technique suggests the transition of microbial community and improvement in microbial diversity.
Assessment of Diagnostic Value of Serum Ceruloplasmin for Wilson’s Disease in Children
Authors: Lu Xinshuo , Li Simin , Zhang Wen , Lin Yunting , Lu Zhikun , Cai Yanna , Su Xueying , Shao Yongxian , Liu Zongcai , Sheng Huiying , Huang Yonglan , Liu Li , Zeng Chunhua 
Published: August 2021

Abstract
Background:
Serum ceruloplasmin is one of the major diagnostic parameters for Wilson’s disease (WD). Age and gender difference of serum ceruloplasmin remain controversy. This study aims to assess diagnostic value of serum ceruloplasmin for WD in children.
Methods:
Serum ceruloplasmin were measured in 317 WD patients, 21 heterozygotes, 372 healthy control children and 154 non-WD patients. Receiver operating characteristic (ROC) curve was used to determine the diagnostic accuracy of serum ceruloplasmin for WD in children.
Results:
Among healthy controls, serum ceruloplasmin was mildly low in the infants younger than 6 months, and then presented around 26–33 mg/dl from 6 months to 15 years. Few (8.1%) of healthy children had serum ceruloplasmin < 20 mg/dL. Serum ceruloplasmin was 5.7 ± 4.7 mg/dl in WD patients, 25.6 ± 5.9 mg/dl in heterozygous carriers. Only 1.9% of WD patients had serum ceruloplasmin > 20 mg/dL. Serum ceruloplasmin had gender difference, higher in healthy boys than healthy girls, and also higher in asymptomatic WD boys than asymptomatic WD girls (p < 0.01, p < 0.05). Serum ceruloplasmin presented genotypic difference. WD patients with R778L homozygotes exhibited lower level of serum ceruloplasmin than WD patients without R778L (p < 0.05). The ROC curve revealed that serum ceruloplasmin, at a cutoff value of 16.8 mg/dL, had the highest AUC value (0.990) with a sensitivity of 95.9% and a specificity of 93.6%.
Conclusions:
Serum ceruloplasmin is a reliable diagnostic criteria for WD in children. Gender and genotypic difference of serum ceruloplasmin should be considered. The cutoff value of serum ceruloplasmin < 16.8 mg/dL may provide the highest accuracy for diagnosis of WD in children.
Transcriptome Analysis Reveals Upregulated Secondary Metabolite Pathways in Micropropagated Lawsonia Inermis L.
Authors: Samanta Dipu , Das Debapriya , Ganguli Sayak , Roy Debleena 
Published: August 2021

Abstract
Humans are dependent on plants for medicines, food and raw materials. Among the many plants used, Henna plant (Lawsonia inermis) have been found to be useful, medicinally and commercially. The pigment lawsone (2-hydroxy-1,4-nathaquinone) derived from the plant is the source of Mehendi, used for dying. The plant has a vast repertoire of secondary metabolites, giving the plant medicinal properties like anticarcinogenic, anti-diabetic, anti-inflammatory, immunostimulatory and many more. This creates a huge demand pressure for the plant, which can’t be met by traditional farming. There have been reports of low propagation rate from stem cuttings and seed. So, micropropagation remains the only tool, for the large scale vegetative propagation, without exposing the plant to stress, saving the plant from overexploitation. The plant was established in vitro, with hormonal manipulation. The study shows BAP 4 mg/L and combination hormone of BAP 2 mg/L + Kn 2 mg/L to have best results for shoot bud multiplication. Rooting was seen to be significant in MS medium, highlighting the low cost of maintenance of the plant. Karyotype analysis was performed between in vivo and in vitro plant sets, followed by transcriptome analysis. Karyotype analysis, performed to validate the homogeneity between in vivo and in vitro plants, showed a chromosome number of 30. Transcriptome analysis through the TRAPID platform showed significant difference between in vivo and in vitro plant’s transcript sets. Pathway analysis revealed enriched secondary metabolite pathways of commercial and economic importance in the in vitro generated plantlets as compared to the wild type control.
The Outcomes of Intravitreal C3F8 Gas Tamponade Combined with Laser Photocoagulation Treatment for Optic Disc Pit Maculopathy
Authors: Mirza Deniz , Mirza Enver , Satirtav Gunhal , Kerimoglu Hurkan 
Published: August 2021

Abstract
Purpose: To share the anatomical results and visual outcomes of intravitreal gas tamponade combined with laser photocoagulation treatment for optic disc pit maculopathy (ODPM). Methods: Intravitreal gas tamponade combined with laser photocoagulation treatmentwas performed on six consecutive patients with ODPM. A 0.3-mL of 100% octafluoropropane (C3F8) gas was injected intravitreally. The patients were then asked to maintain prone position until the C3F8 gas disappeared. Laser photocoagulation was performed the day after the procedure. The outcomes were determined by spectral-domain optical coherence tomography and best-corrected visual acuity (BCVA). Results: In the present study, visual improvement and reduction in serous macular detachment was observed in 83% of the ODPM patients. Complete retinal reattachment was achieved in 66% of the ODPM patients. In one patient, no regression was observed after the repeated treatment and pars plana vitrectomy was performed. The final BCVA improved in five eyes and unchanged in one eye. No postoperative complications were observed during the follow-up period in any patient. Conclusions: Intravitreal C3F8 gas tamponade combined with laser photocoagulation procedure is an effective, minimally invasive, and cost-effective treatment method for ODPM.