Structural investigation of (111) oriented (BiFeO3)(1-x){\Lambda}/(LaFeO3)x{\Lambda} superlattices by X-ray diffraction and Raman spectroscopy

(BiFeO3)(1-x){\Lambda}/(LaFeO3)x{\Lambda} superlattices (SLs) with varying x have been grown by pulsed laser deposition on (111) oriented SrTiO3 substrates. In order to obtain good epitaxy and flat samples a conducting SrRuO3 buffer has been deposited prior to the superlattices to screen the polar mismatch for such (111) SrTiO3 orientation. X-ray diffraction reciprocal space mapping on different family of planes were collected and evidenced a room temperature structural change at x=0.5 from a rhombohedral/monoclinic structure for rich BiFeO3 to an orthorhombic symmetry for rich LaFeO3. This symmetry change has been confirmed by Raman spectroscopy and demonstrates the different phase stability compared to similar SLs grown on (100) SrTiO3. The strongly anisotropic strain and oxygen octahedral rotation/tilt system compatibility at the interfaces probably explain the orientation dependence of the phase stability in such superlattices.Comment: 17 pages, 3 figure

Triple superphosphate, potassium sulfate, and nitrogenous fertilizers effects on fitness and aggressiveness of Fusarium culmorum inducing wheat crown rot

This study examined the effects of N, P, and K fertilizers on Fusarium culmorum on in-vitro mycelial growth and biomass, and aggressiveness on wheat plants. Urea, phosphorus, potassium sulfate, and the mixture of similar amounts of these last two ingredients increased fungal biomass. Rearing mycelia on urea, the mixture, or phosphorus increased aggressiveness by 56%, 120%, and 130%, respectively. But this aggressiveness did not affect inoculated plants dry biomass. However, the inoculum that was reared on ammonium sulfate increased infected plant biomass. These findings infer that the management of this disease may rely on a proper type of fertilizers application. First, farmers are advised to avoid urea and use instead ammonium nitrate; second, place phosphorus and potassium sulfate under the seedbed away from any inoculum in the soil. Therefore, surveying disease development, its past events, soil health, and soil fertility is a prerequisite for any successful control of this disease. Keywords: Fusarium culmorum; Aggressiveness; Fitness; Nitrogen forms; Phosphorus; Potassium sulfate

Activités antifongiques in vitro des huiles essentielles de Mentha pulegium, Eugenia aromatica et Cedrus atlantica sur Fusarium culmorum et Bipolaris sorokiniana.

L’activité antifongique des huiles essentielles (HE) extraites de trois plantes aromatiques et médicinales: Mentha pulegium L., Eugenia aromatica L. et Cedrus atlantica (Manetti ex Endl.).a été testée in vitro sur deux champignons pathogènes des céréales : Fusarium culmorum ((Wm.G.Sm.) Sacc. 1892) et Bipolaris sorokiniana ((Sacc.) Shoemaker, 1959). Les milieux de culture utilisés pour ces deux pathogènes sont respectivement : le milieu PDA et le milieu V8. Partant des concentrations mères de 1,25 ml d’huile essentielle par litre du milieu de culture, pour chaque champignon, les concentrations minimales inhibitrices (CMI) de ces huiles essentielles ont été déterminées par dilutions successives des solutions mères, et les effets fongicide et/ou fongistatique de ces dilutions ont été mis en évidence. Ainsi pour Fusarium culmorum, l’HE d’Eugenia aromatica s’est avérée la meilleure avec la concentration minimale fongicide de 0,624 ml/L, vient ensuite celle de Mentha pulegium dont la concentration mère est de 1,25 ml/L a été minimale fongicide, mais cette même concentration de Cedrus atlantica a seulement ralenti le développement de ce champignon. Pour Bipolaris sorokiniana, la concentration de 0,156 ml/L de HE d’Eugenia aromatica est la CMI, et elle est fongistatique. Les concentrations utilisées pour les HE de Mentha pulegium et Cedrus atlantica ont toutes ralenti le développement du champignon sans pour autant l’arrêter complètement

Health visiting teams and children’s oral health: a scoping review

Background Recent policies have recommended early-life interventions to prevent caries. The four nations of the UK each have a national universal children’s health programme, through which health visitors and their wider team (HVTs) promote health in the early years. HVT visits offer an opportunity to support parents to improve their child’s oral health. A scoping review was conducted to provide a descriptive synthesis of the current literature related to the role of HVTs in improving the oral health of children 0–5 years old and to identify significant gaps for future research. This review informed the feasibility study of the First Dental Steps Intervention, a targeted health visitor-led infant oral health intervention in England. Methods Electronic database searches for peer-reviewed literature were performed using Medline via Ovid and Web of Science (1946–2021). The quality of included intervention studies was assessed using the Effective Public Health Practice Project tool. Additionally, a grey literature search was conducted (key organisations, bibliographic and thesis databases, forwards and backwards citation, Google). Results Thirty-nine publications, published between 1980 and 2021, were included. The majority of included papers were from the UK. The quality of intervention studies (n = 7) ranged from weak to strong. Thematic analysis identified the following themes: (1) professional knowledge, education, and training; (2) involvement of HVs in the delivery of oral health interventions; (3) effectiveness of interventions; (4) perspectives of HVs providing oral health advice and acceptability; and (5) barriers and facilitators to promoting oral health. The grey literature search identified 125 sources. HVT involvement was reported in a variety of source types: reports, guidance documents, evaluations, reviews, and training resources. HVTs were involved in oral health by providing oral health packs, brushing and oral health advice, registration and attendance, oral health training, risk assessment, and referral to dental services. Conclusion The current literature suggests that HVTs are well placed to improve children’s oral health. Facilitators and barriers are encountered by HVTs in promoting oral health which should be considered by commissioners. There is a need for future high-quality studies that address the inadequacies found and provide further evidence of the effectiveness of HVT’s oral health interventions

ADENOCARCINOME DE LA TROMPE. A PROPOS DE DEUX CAS ET REVUE DE LA LITTERATUTRE

Introduction: The primary cancer of the fallopian tube is rare. They represent less than 2% of gynecological tumors and they are dominated by adenocarcinoma. Clinical Observations: We report two cases of tubal adenocarcinoma in two patients followed at the Department of Surgery II, National Institute of Oncology Rabat. Discussion: Tubal adenocarcinoma is a common disease in postmenopausal women. the diagnosis of primary cancer of the fallopian tube is difficult. treatment is similar malignant epithelial ovarian tumors with a better prognosis in the early stages. Conclusion: Rare cancer of unknown etiology, clinical signs is often separated, the preoperative diagnosis is difficult, with a prognosis depends on the stage of the disease.Introduction : Les cancers primitifs de la trompe sont rares. Ils représentent moins de 2% des tumeurs gynécologiques et ils sont dominés par l’adénocarcinome. Observations cliniques : Nous rapportons deux cas d’adénocarcinomes tubaires chez deux patientes suivies au service de chirurgie II institut national d’oncologie Rabat. Discussion : L’adénocarcinome tubaire est une pathologie plus fréquente chez la femme ménopausée. Le diagnostic de cancer primitif de la trompe est très difficile à affirmer. Le traitement rejoint celui des tumeurs épithéliales malignes de l’ovaire avec un pronostic meilleur dans les stades précoces. Conclusion : Cancer rare d’étiologie méconnue, les signes cliniques sont souvent dissociés, le diagnostic préopératoire est difficile, avec un pronostic qui dépend du stade de la maladie

A national survey of supervised toothbrushing programmes in England

Introduction Supervised toothbrushing programmes (STPs) are a cost-effective public health intervention, reducing tooth decay and health inequalities in children. However, the uptake of STPs in England is unknown. This study aimed to establish the current provision of STPs across England and summarise the barriers and facilitators to their implementation. Methods An online survey was sent to dental public health consultants, local authority (LA) oral health leads, and public health practitioners across England. Quantitative data were analysed using descriptive statistics. Barriers and facilitators were analysed using the Consolidated Framework for Implementation Research. Results Information was received for 141 LAs across England. Approximately half implemented an STP (n = 68/141). Most STPs were commissioned by LAs (n = 44/68) and adopted a targeted approach (n = 54/68). Barriers to implementation were: 1) acquiring funding; 2) poor communication and engagement between LAs, oral health providers and settings; 3) oral health not a priority; 4) logistically challenging to implement; and 5) lack of capacity. Facilitators were: 1) an integrated and mandated public health approach; 2) collaboration and ongoing support between LAs, oral health providers, and settings; 3) clarity of guidance; 4) flexible approach to delivery; 5) adequate available resources; and 6) ownership and empowerment of setting staff. Conclusion The current provision of STPs is varied, and although there are challenges to their implementation, there are also areas of good practice where these challenges have been overcome

Study protocol for First Dental Steps Intervention: feasibility study of a health visitor led infant oral health improvement programme.

BACKGROUND: Dental caries in childhood is a burden on the daily lives of children and their families, and associated with poor oral health in adulthood. In England, dental caries is the most common reason for young children to be admitted to hospital. It is believed that most tooth extractions (due to decay) for children aged 10 years and under, could be avoided with improved prevention and early management. National public health policy recommendations in England include specific oral health initiatives to tackle tooth decay. One of these initiatives is delivered as part of the Healthy Child Programme and includes providing workforce training in oral health, integrating oral health advice into home visits, and the timely provision of fluoride toothpaste. This protocol seeks to assess the delivery of the First Dental Steps intervention and uncertainties related to the acceptability, recruitment, and retention of participants. METHODS: This study seeks to explore the feasibility and acceptability of the First Dental Steps intervention and research methods. First Dental Steps intervention will be delivered in local authority areas in South West England and includes oral health training for health visitors (or community nursery nurses) working with 0-5-year-olds and their families. Further, for vulnerable families, integrating oral health advice and the provision of an oral health pack (including a free flow cup, an age appropriate toothbrush, and 1450 ppm fluoride toothpaste) during a mandated check by a health visitor. In this study five local authority areas will receive the intervention. Interviews with parents receiving the intervention and health visitors delivering the intervention will be undertaken, along with a range of additional interviews with stakeholders from both intervention and comparison sites (four additional local authority areas). DISCUSSION: This protocol was written after the start of the COVID-19 pandemic, as a result, some of the original methods were adjusted specifically to account for disruptions caused by the pandemic. Results of this study will primarily provide evidence on the acceptability and feasibility of both the First Dental Steps intervention and the research methods from the perspective of both families and stakeholders