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1.
Zootaxa ; 5399(3): 231-240, 2024 Jan 12.
Article in English | MEDLINE | ID: mdl-38221160

ABSTRACT

Three new water mite species of the genus Lebertia Neuman, 1880Lebertia (Lebertia) gimina sp. nov., Lebertia (Mixolebertia) dinghuensis sp. nov. and Lebertia (Mixolebertia) wuyiensis sp. nov.are described from China, along with one new Chinese recordLebertia (Lebertia) ignatowi Sokolow, 1930. The key characteristics for the subgenera of Lebertia are given.


Subject(s)
Mites , Animals , Water , China
2.
Cancer Genomics Proteomics ; 20(6suppl): 669-678, 2023 Dec.
Article in English | MEDLINE | ID: mdl-38035701

ABSTRACT

Rapid advancements in high-throughput biological techniques have facilitated the generation of high-dimensional omics datasets, which have provided a solid foundation for precision medicine and prognosis prediction. Nonetheless, the problem of missing heritability persists. To solve this problem, it is essential to explain the genetic structure of disease incidence risk and prognosis by incorporating interactions. The development of the Bayesian theory has provided new approaches for developing models for interaction identification and estimation. Several Bayesian models have been developed to improve the accuracy of model and identify the main effect, gene-environment (G×E) and gene-gene (G×G) interactions. Studies based on single-nucleotide polymorphisms (SNPs) are significant for the exploration of rare and common variants. Models based on the effect heredity principle and group-based models are relatively flexible and do not require strict constraints when dealing with the hierarchical structure between the main effect and interactions (M-I). These models have a good interpretability of biological mechanisms. Machine learning-based Bayesian approaches are highly competitive in improving prediction accuracy. These models provide insights into the mechanisms underlying the occurrence and progression of complex diseases, identify more reliable biomarkers, and develop higher predictive accuracy. In this paper, we provide a comprehensive review of these Bayesian approaches.


Subject(s)
Machine Learning , Polymorphism, Single Nucleotide , Humans , Bayes Theorem
3.
Zootaxa ; 5257(1): 17-39, 2023 Mar 24.
Article in English | MEDLINE | ID: mdl-37044622

ABSTRACT

This is the first investigation of stick insect from the Yintiaoling National Nature Reserve, Chongqing of China. Totally seven species were collected. Four of them belong to the subfamily Clitumninae of Phasmatidae: Interphasma emeiense Chen & He, 2008, Paraentoria sichuanensis Chen & He, 1997, Parabaculum wushanense (Chen & He, 1997) and Baculonistria alba (Chen & He, 1990). The other three belong to the subfamily Necrosciinae of Lonchodidae, including two new species: Micadina conifera Chen & He, 1997, Hemisosibia yintiaolingensis sp. nov. and Dianphasma chongqingensis sp. nov..


Subject(s)
Insecta , Neoptera , Animals , China
4.
Small ; 19(1): e2204454, 2023 Jan.
Article in English | MEDLINE | ID: mdl-36382574

ABSTRACT

Piezoelectric materials should simultaneously possess the soft properties (high piezoelectric coefficient, d33 ; high voltage coefficient, g33 ; high electromechanical coupling factor, k) and hard properties (high mechanical quality factor, Qm ; low dielectric loss, tan δ) along with wide operation temperature (e.g., high rhombohedral-tetragonal phase transition temperature Tr-t ) for covering off-resonance (figure of merit (FOM), d33  × g33 ) and on-resonance (FOM, Qm  × k2 ) applications. However, achieving hard and soft piezoelectric properties simultaneously along with high transition temperature is quite challenging since these properties are inversely related to each other. Here, through a synergistic design strategy of combining composition/phase selection, crystallographic texturing, defect engineering, and water quenching technique, <001> textured 2 mol% MnO2 doped 0.19PIN-0.445PSN-0.365PT ceramics exhibiting giant FOM values of Qm  × k 31 2 $k_{31}^2$ (227-261) along with high d33  × g33 (28-35 × 10-12 m2 N-1 ), low tan δ (0.3-0.39%) and high Tr-t of 140-190 °C, which is far beyond the performance of the state-of-the-art piezoelectric materials, are fabricated. Further, a novel water quenching (WQ) room temperature poling technique, which results in enhanced piezoelectricity of textured MnO2 doped PIN-PSN-PT ceramics, is reported. Based upon the experiments and phase-field modeling, the enhanced piezoelectricity is explained in terms of the quenching-induced rhombohedral phase formation. These findings will have tremendous impact on development of high performance off-resonance and on-resonance piezoelectric devices with high stability.

5.
Nat Commun ; 13(1): 3565, 2022 Jun 22.
Article in English | MEDLINE | ID: mdl-35732653

ABSTRACT

Electromechanical coupling factor, k, of piezoelectric materials determines the conversion efficiency of mechanical to electrical energy or electrical to mechanical energy. Here, we provide an fundamental approach to design piezoelectric materials that provide near-ideal magnitude of k, via exploiting the electrocrystalline anisotropy through fabrication of grain-oriented or textured ceramics. Coupled phase field simulation and experimental investigation on <001> textured Pb(Mg1/3Nb2/3)O3-Pb(Zr,Ti)O3 ceramics illustrate that k can reach same magnitude as that for a single crystal, far beyond the average value of traditional ceramics. To provide atomistic-scale understanding of our approach, we employ a theoretical model to determine the physical origin of k in perovskite ferroelectrics and find that strong covalent bonding between B-site cation and oxygen via d-p hybridization contributes most towards the magnitude of k. This demonstration of near-ideal k value in textured ceramics will have tremendous impact on design of ultra-wide bandwidth, high efficiency, high power density, and high stability piezoelectric devices.

6.
J Food Prot ; 85(8): 1142-1147, 2022 08 01.
Article in English | MEDLINE | ID: mdl-35503969

ABSTRACT

ABSTRACT: Food additives are widespread in the human diet; however, their excessive intake can have an impact on the quality of health. This study evaluated food additives in bread and pasta products consumed by residents in various regions of Jilin Province, People's Republic of China, from 2019 to 2021. We collected samples of bread and six types of pasta products from farmers' markets and morning markets and used high-performance liquid chromatography, UV-visible spectrophotometry, and graphite furnace atomic absorption spectrometry to detect the content of the following food additives: sodium formaldehyde sulfoxylate, aluminum, and borate compounds. For 836 samples in total, we detected the presence of sodium formaldehyde sulfoxylate, aluminum, and borate compounds in excess rates reaching 3.5, 10, and 4.7%, respectively. Aluminum in fried breadsticks exceeded the standard by 40%. The results of this study can be used to assess the overall pass rate of bread and pasta products sold in Jilin Province and support the detection of possible food safety problems.


Subject(s)
Aluminum , Bread , Aluminum/analysis , Borates/analysis , Bread/analysis , China , Food Additives/chemistry , Formaldehyde , Humans , Sodium , Triticum/chemistry
7.
Adv Sci (Weinh) ; 9(14): e2105715, 2022 May.
Article in English | MEDLINE | ID: mdl-35297225

ABSTRACT

Piezoelectric materials enable the conversion of mechanical energy into electrical energy and vice-versa. Ultrahigh piezoelectricity has been only observed in single crystals. Realization of piezoelectric ceramics with longitudinal piezoelectric constant (d33 ) close to 2000 pC N-1 , which combines single crystal-like high properties and ceramic-like cost effectiveness, large-scale manufacturing, and machinability will be a milestone in advancement of piezoelectric ceramic materials. Here, guided by phenomenological models and phase-field simulations that provide conditions for flattening the energy landscape of polarization, a synergistic design strategy is demonstrated that exploits compositionally driven local structural heterogeneity and microstructural grain orientation/texturing to provide record piezoelectricity in ceramics. This strategy is demonstrated on [001]PC -textured and Eu3+ -doped Pb(Mg1/3 Nb2/3 )O3 -PbTiO3 (PMN-PT) ceramics that exhibit the highest piezoelectric coefficient (small-signal d33 of up to 1950 pC N-1 and large-signal d33 * of ≈2100 pm V-1 ) among all the reported piezoelectric ceramics. Extensive characterization conducted using high-resolution microscopy and diffraction techniques in conjunction with the computational models reveals the underlying mechanisms governing the piezoelectric performance. Further, the impact of losses on the electromechanical coupling is identified, which plays major role in suppressing the percentage of piezoelectricity enhancement, and the fundamental understanding of loss in this study sheds light on further enhancement of piezoelectricity. These results on cost-effective and record performance piezoelectric ceramics will launch a new generation of piezoelectric applications.

8.
J Food Prot ; 85(5): 728-734, 2022 05 01.
Article in English | MEDLINE | ID: mdl-34982815

ABSTRACT

ABSTRACT: This study evaluated the microbial contamination status of cold dishes consumed by residents of Jilin Province and investigated to determine the incidence of four pathogenic bacteria in cold dishes. A total of 300 samples of cold dishes, including meat, vegetable, and mixed products, were collected from three purchasing places: supermarkets, farmers' markets, and mobile vendors. Viable bacteria were isolated using conventional culture methods. After separation, a quick and easy PCR was used to detect Listeria monocytogenes, Staphylococcus aureus, enterotoxigenic Escherichia coli, and Salmonella. The results showed that the total number of microbial colonies in the vegetable samples exceeded the standard rate of 8% and the total number of microbial colonies in the meat and mixed samples did not exceed the standard. The total microbial colony count exceeded the standard in all three procurement sites, with the highest exceedance of 7.4% in the mobile vendor sites. The detection rates of enterotoxigenic E. coli, S. aureus, L. monocytogenes, and Salmonella, among the four pathogenic bacteria detected in all samples, were 4.3, 3.3, 3.0, and 1.0%, respectively. This study can be used to qualitatively assess the microbiological quality associated with cold dishes. It provides data to support the detection of possible food safety problems.


Subject(s)
Food Microbiology , Listeria monocytogenes , Colony Count, Microbial , Escherichia coli , Food Contamination/analysis , Prevalence , Salmonella , Staphylococcus aureus , Vegetables/microbiology
9.
Anticancer Res ; 42(1): 75-85, 2022 Jan.
Article in English | MEDLINE | ID: mdl-34969711

ABSTRACT

BACKGROUND/AIM: To analyze the impact of minimally invasive surgery for endometrial cancer on overall survival among age >65. PATIENTS AND METHODS: We examined women who underwent hysterectomy from 2010 to 2015 from the U.S. National Cancer Data Base (NCDB). We evaluated the impact of surgical approach on survival. RESULTS: Of 243,601 endometrial cancer cases, 42,458 met the inclusion criteria. Laparoscopic approach was associated with improved survival by 14% (HR=0.86; 95%CI=0.80-0.92; p<0.001) and robotic approach was associated with improved survival by 12% (HR=0.88; 95%CI=0.83-0.93; p<0.0001), compared to the open approach. Similarly, the weighted adjusted 5-year overall survival was 73.1% (95%CI=72%-74.2%), 76.4% (95%CI=75.1-77.7%), and 75.5% (95%CI=74.7-76.4%) for open, laparoscopic, and robotic approaches, respectively (p<0.001). CONCLUSION: Minimally invasive surgery improved overall survival in women over 65 years with endometrial cancer.


Subject(s)
Endometrial Neoplasms/surgery , Minimally Invasive Surgical Procedures/methods , Aged , Aged, 80 and over , Endometrial Neoplasms/pathology , Female , Humans
10.
Cancer Genomics Proteomics ; 18(3 Suppl): 451-459, 2021.
Article in English | MEDLINE | ID: mdl-33994367

ABSTRACT

BACKGROUND/AIM: The prevalence of idiopathic pulmonary fibrosis (IPF) increases with age and is associated with senescence of alveolar epithelial cells (AECs). AEC senescence in pulmonary cells mediates IPF. We herein aimed to determine if YAP1 gene knockdown, a member of the Hippo/YAP signal pathway, in the bleomycin (BLM)-induced mouse model of IPF, inhibits onset of senescence of AECs and alleviates IPF. MATERIALS AND METHODS: Adeno-associated viruses (AAVs) expressing Yes-associated protein 1 (YAP1) short hairpin RNA (shRNA) were delivered into the lung of BLM-induced IPF mice via intratracheal injection, to knockdown the YAP1 gene in AECs. The mice were assigned to 4 groups: G1: control (normal mice); G2: IPF mice; G3: IPF + AAV/YAP1; G4: IPF + AAV/scramble. After 28 days, AECs were examined for senescence using H&E staining, Masson's trichrome Staining, senescence-associated ß-galactosidase (SA-ß-gal) staining, western blotting and co-immunofluorescence staining, to determine the expression of YAP1, Smad-3 and p21, in order to determine the induction of senescence of ACEs. RESULTS: The severity of IPF determined by H&E staining, Masson's staining and immunofluorescence (IF) staining was positively correlated with the senescence of AECs. Down-regulation of YAP1 expression of the Hippo-signaling pathway, determined by western blotting in AECs, alleviated pulmonary fibrosis as determined by Masson's staining. Down regulation of YAP1 expression reduced the senescence of AECs as determined by ß-galactosidase (SA-ß-gal) staining, which alleviated the clinical symptoms of IPF mice, as determined by body weight and lung index. CONCLUSION: Down-regulation of YAP1 expression in AECs inhibited AEC senescence which is thought to be the cause of IPF. Therefore, future studies can focus on inhibiting YAP1 to effectively treat IPF.


Subject(s)
Adaptor Proteins, Signal Transducing/metabolism , Alveolar Epithelial Cells/metabolism , Idiopathic Pulmonary Fibrosis/genetics , Transcription Factors/metabolism , Animals , Cellular Senescence , Disease Models, Animal , Humans , Idiopathic Pulmonary Fibrosis/pathology , Male , Mice , Signal Transduction , YAP-Signaling Proteins
11.
Zootaxa ; 4942(1): zootaxa.4942.1.8, 2021 Mar 11.
Article in English | MEDLINE | ID: mdl-33756916

ABSTRACT

A new species, Trachystolodes tianjialini sp. nov., from Houhe National Nature Reserve, Hubei, China, is described and illustrated.


Subject(s)
Coleoptera , Animal Structures , Animals , Body Size , China , Organ Size
12.
Anticancer Res ; 41(3): 1213-1218, 2021 Mar.
Article in English | MEDLINE | ID: mdl-33788712

ABSTRACT

BACKGROUND/AIM: Overexpression of inflammatory cytokines and oxidative stress increase the risk of colorectal cancer (CRC) in obesity and hyperlipidemia. The aim of this study was to investigate whether the monoterpene antioxidant p-cymene would reduce the incidence of CRC in a rat model of hyperlipidemia. MATERIALS AND METHODS: The hyperlipidemic CRC rat model was established by a high-fat diet and dimethyl hydrazine (DMH) induction. All rats received 30 mg/kg DMH to induce CRC, and were then assigned to groups with a normal diet or high-fat diet with/without 30 mg/kg/day p-cymene orally during the entire experimental period. Tumor incidence in each group, and the level of serum inflammatory cytokines and oxidative stress-related markers in intestinal tissues were measured. RESULTS: p-Cymene significantly inhibited CRC occurrence in hyperlipemic rats (p=0.024) by reducing the expression of serum inflammatory cytokines (interleukin-1 by 54.5%; interleukin-6 by 28.3%; adiponectin by 26.3%; cyclo-oxygenase-2 by 48.4%) and intestinal oxidative-stress cytokines (total antioxidant capacity by 30.4%; superoxide dismutase by 30.3%; malondialdehyde by 47.1%). CONCLUSION: p-Cymene has clinical potential to reduce the incidence of CRC in hyperlipemia.


Subject(s)
Antioxidants/pharmacology , Colorectal Neoplasms/prevention & control , Cymenes/pharmacology , Cytokines/genetics , Hyperlipidemias/complications , Oxidative Stress/drug effects , Animals , Colorectal Neoplasms/metabolism , Cymenes/therapeutic use , Diet, High-Fat , Disease Models, Animal , Female , Male , Rats , Rats, Wistar
13.
Zootaxa ; 5082(4): 384-392, 2021 Dec 20.
Article in English | MEDLINE | ID: mdl-35390957

ABSTRACT

A new species of stag beetle, Prosopocoilus zhuchuangi new species (Coleoptera: Lucanidae: Lucaninae) is described from China (Guizhou) and Vietnam. It is closely related to P. fulgens (Didier, 1927), sharing a fringe of dense setae in the apical 2/3 of the mesal sides of the mesotibiae and metatibiae. Diagnostic characters of the two species are illustrated and compared.


Subject(s)
Coleoptera , Animals , China , Vietnam
14.
J Food Prot ; 84(3): 481-489, 2021 Mar 01.
Article in English | MEDLINE | ID: mdl-33108463

ABSTRACT

ABSTRACT: We evaluated fresh vegetables for residues of 18 pesticides with different chemical structures, including organochlorine pesticides, organophosphorus pesticides, carbamate pesticides, and pyrethroid pesticides and estimated that the potential health risks for consumers. A total of 313 samples were collected from 12 kinds of vegetables in Changchun, the capital of Jilin Province, People's Republic of China. Pesticide residues were analyzed by gas chromatography and mass spectrometry, and the curves were highly linear at 0.01 to 1.00 µg/mL (R2 ≥ 0.99). The mean recovery rate of the pesticides was 62 to 110% (relative standard deviation of <5%). The limit of detection was 0.0001 to 0.0167 mg/kg, the limit of quantification was 0.0002 to 0.0556 mg/kg, and the overall detection rate was 28.43%. The prevalence of pesticides and of samples above the standard limit were highest in celery, the prevalence of pesticides was lowest in potatoes, and the prevalence of samples above the standard limit was lowest in cucumber. Three of the 18 pesticides were not detected: omethoate, chlorpyrifos, and fenvalerate. Among the 15 pesticides detected, the maximum risk factor of six (carbofuran, omethoate, phorate, dicofol, dimethoate, and dichlorvos) is >1, indicating possible harm to human health. Residues of a single pesticide may not adversely affect a person's health, but multiple pesticide residues could present a health risk.


Subject(s)
Pesticide Residues , Pesticides , China , Food Contamination/analysis , Humans , Pesticide Residues/analysis , Vegetables
15.
ACS Appl Mater Interfaces ; 12(40): 44981-44990, 2020 Oct 07.
Article in English | MEDLINE | ID: mdl-32914950

ABSTRACT

Control of magnetic permeability through electric field in magnetoelectric materials promises to create novel voltage tunable inductors (VTIs). VTIs synthesized using co-fired ceramic processing exhibit many advantages over traditional epoxy bonding method, but the internal residual stress in co-fired VTIs resulting from thermal expansion mismatch hinders a full exploitation of the tunability of permeability. To find the optimal condition for high tunability of co-fired VTIs, domain-level phase field modeling and computer simulation are employed to study co-fired magnetoelectric composites comprising NiZn ferrite and PZT. Two key factors important toward increasing the inductor tunability are systematically investigated: intrinsic magnetocrystalline anisotropy of the ferrite material and internal residual stress caused by the co-firing process. The simulations indicate that in order to achieve a large tunability, the tuned permeability should be confined within the linear region of the reciprocal of susceptibility and stress. Additionally, both magnetocrystalline anisotropy and residual stress should be as small as possible. These results provide a design strategy for realizing high-tunability co-fired VTIs.

16.
J Cosmet Sci ; 70(2): 89-105, 2019.
Article in English | MEDLINE | ID: mdl-31125308

ABSTRACT

The skin mildness of two commercial laundry detergents designed for sensitive skin, Tide Free and Gentle® (TFG) versus All Free Clear® (AFC), was compared in clinical studies, and the role of marked product pH differences was assessed. Two double-blind randomized human studies were conducted. Study 1 was a 1-day repeat insult forearm test, in which four exposures to solutions of TFG or AFC were performed to mimic direct exposure to dilute detergent during hand-laundering. Corneometer, erythema and dryness grading, transepidermal water loss (TEWL), and skin surface pH evaluations were carried out. Study 2 was a 21-day arm patch test of fabrics washed with TFG or AFC to mimic indirect contact to skin of detergent residues, with erythema grading. Separately, pH and reserve alkalinity were determined for each detergent. In Study 1, TFG was significantly milder than AFC in all measures except TEWL (no significant difference). In Study 2, the detergents were approximately equivalent in erythema grading. Analysis showed AFC was substantially more alkaline (pH 10.8) than TFG (pH 7.9) with higher reserve alkalinity. TFG was significantly milder than AFC in Study 1, which may be due in part to the increased skin surface pH seen with direct exposure to AFC's high alkalinity.


Subject(s)
Laundering , Detergents , Double-Blind Method , Humans , Hydrogen-Ion Concentration , Skin
17.
J Psychiatr Pract ; 25(3): 179-185, 2019 05.
Article in English | MEDLINE | ID: mdl-31083029

ABSTRACT

OBJECTIVES: The goal of this study was to assess Chinese therapists' beliefs about exposure therapy and to examine the psychometric properties of the Chinese version of the Therapist Beliefs about Exposure Scale (TBES). Modification of therapists' beliefs about exposure therapy was also assessed following attendance at an exposure and response prevention therapy (ERP) training workshop. METHODS: A total of 203 therapists participated in the study. The TBES and a measure of anxiety sensitivity were administered in Chinese. After a half-day ERP training workshop, the Chinese version of the TBES was administered to the participants again. RESULTS: The Chinese version of the TBES demonstrated adequate internal consistency, moderate item-level psychometric properties, and a normal distribution in the sample in this study. The TBES scores of the participants decreased significantly after they attended an ERP training course. The reduction in TBES scores was significantly correlated with therapists' caseload of clients with obsessive-compulsive disorder. CONCLUSIONS: The results of this study support the reliability of the Chinese version of the TBES. Chinese therapists had more negative beliefs about exposure than did American therapists who were evaluated in a different study; however, therapists' negative beliefs were significantly reduced after they attended an ERP training workshop. Future studies are encouraged to explore effective strategies to improve the disseminiation and delivery of exposure therapy in China.


Subject(s)
Anxiety Disorders/therapy , Attitude of Health Personnel , Implosive Therapy , Obsessive-Compulsive Disorder/therapy , Psychometrics , Surveys and Questionnaires , Adult , China , Female , Humans , Male , Reproducibility of Results
18.
J Biosci ; 44(6)2019 Dec.
Article in English | MEDLINE | ID: mdl-31894109

ABSTRACT

Osteoarthritis (OA), a type of joint diseases, could result in breakdown of joint cartilage and underlying bone. Accumulating evidences suggested that long non-coding RNAs play important roles in OA progression. However, the underlying mechanism of H19 in OA is still not fully explored. The expression levels of H19 and miR-106a-5p in OA samples from patients or cultured chondrocytes were examined by quantitative real time polymerase chain reaction. Cell proliferation and apoptosis were analysed by MTT assay and flow cytometry, respectively. Western blotting was employed to detect the expression levels of PCNA, CyclinD1, Caspase 3 and Cleaved Caspase 3. StarBase database, luciferase assay and RNA immunoprecipitation were introduced to confirm the relationship between H19 and miR-106a-5p. The correlation of H19 and miR-106a-5p was analysed by Spearman rank analysis. H19 expression was upregulated, while miR-106a-5p level was downregulated in OA samples and IL-1b-treated chondrocytes. H19 overexpression inhibited the proliferation and induced apoptosis in IL-1b-treated chondrocytes, while H19 knockdown induced the opposite effect. Luciferase and RIP assay demonstrated that miR-106a-5p was a direct target of H19. miR-106a-5p overexpression led to proliferation promotion and apoptosis inhibition in chondrocytes treated by IL-1ß and it reversed the effect of H19 addition. We conclude that H19 could regulate proliferation and apoptosis of chondrocytes treated by IL-1ß in OA via sponging miR-106a-5p.


Subject(s)
Interleukin-1beta/genetics , MicroRNAs/genetics , Osteoarthritis/genetics , RNA, Long Noncoding/genetics , Apoptosis/genetics , Cell Line , Cell Proliferation/genetics , Chondrocytes/metabolism , Chondrocytes/pathology , Female , Gene Expression Regulation/genetics , Humans , Male , Osteoarthritis/pathology
19.
Nat Commun ; 9(1): 4998, 2018 11 27.
Article in English | MEDLINE | ID: mdl-30479327

ABSTRACT

The electrical modulation of magnetization through the magnetoelectric effect provides a great opportunity for developing a new generation of tunable electrical components. Magnetoelectric voltage tunable inductors (VTIs) are designed to maximize the electric field control of permeability. In order to meet the need for power electronics, VTIs operating at high frequency with large tunability and low loss are required. Here we demonstrate magnetoelectric VTIs that exhibit remarkable high inductance tunability of over 750% up to 10 MHz, completely covering the frequency range of state-of-the-art power electronics. This breakthrough is achieved based on a concept of magnetocrystalline anisotropy (MCA) cancellation, predicted in a solid solution of nickel ferrite and cobalt ferrite through first-principles calculations. Phase field model simulations are employed to observe the domain-level strain-mediated coupling between magnetization and polarization. The model reveals small MCA facilitates the magnetic domain rotation, resulting in larger permeability sensitivity and inductance tunability.

20.
J Food Prot ; 81(12): 2082-2089, 2018 12.
Article in English | MEDLINE | ID: mdl-30485763

ABSTRACT

Food production-related facilities (farms, packing houses, etc.) are monitored for foodborne pathogens, and data from these facilities can provide a rich source of information about the population structure and genetic diversity of Salmonella and Listeria. This information is of both academic interest for understanding the evolutionary forces acting on these organisms and of practical interest to those responsible for controlling pathogens in facilities and to those analyzing data from facilities in the context of public health decision making. We have collected information about all positive isolates from facility inspections performed by the U.S. Food and Drug Administration for which whole genome sequencing data are available. The within- and between-facilities observed genetic diversity of isolates was computed and related to the common origin of isolates (as the common collected facility). This relationship provides quantification for assessing the relationship between isolates based on their genetic similarity quantified by single-nucleotide polymorphisms (SNPs). Our results show that if the genetic distance ( D) between two isolates is low, then more likely than not they are from the same facility or have some overlap in their supply chain. For example, if the genetic distance is no more than 20 SNPs, the probability ( P) that two isolates come from the same facility = 0.66 for Salmonella and 0.70 for Listeria. However, if two isolates come from different facilities, their genetic distance is likely large (for Salmonella, P( D > 20 SNPs) = 0.99982; for Listeria, P( D > 20 SNPs) = 0.99949); even if two isolates come from the same facility, their genetic distance is also very likely large (for Salmonella, P( D > 20 SNPs) = 0.794; for Listeria, P( D > 20 SNPs) = 0.692). These results provide insight into what SNP thresholds might be appropriate when determining whether two isolates are from the same facility and thus would be of interest to those investigating foodborne outbreaks and conducting traceback investigations.


Subject(s)
Equipment Contamination , Food-Processing Industry , Listeria , Salmonella , Foodborne Diseases , Genetic Variation , Genome, Bacterial , Humans , Listeria/genetics , Listeria/isolation & purification , Polymorphism, Single Nucleotide , Salmonella/genetics , Salmonella/isolation & purification
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