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Zeolite-based catalysts are usually utilized in the form of a composite with binders, such as alumina, silica, clay, and others. However, these binders are usually known to block the accessibility of the active sites in zeolites, leading to a decreased effective surface area and agglomeration of zeolite particles. The aim of this work is to utilize carbon nanostructures (CNS) as a binding material for nano-zeolite-Y particles. The unique properties of CNS, such as its high surface area, thermal stability, and flexibility of its fibrous structure, makes it a promising material to hold and bind the nano-zeolite particles, yet with a contemporaneous accessibility of the reactants to the porous zeolite structure. In the current study, a nano-zeolite-Y/CNS composite catalyst was fabricated through a ball milling approach. The catalyst possesses a high surface area of 834 m2/g, which is significantly higher than the conventional commercial cracking catalysts. Using CNS as a binding material provided homogeneous distribution of the zeolite nanoparticles with high accessibility to the active sites and good mechanical stability. In addition, CNS was found to be an effective binding material for nano-zeolite particles, solving their major drawback of agglomeration. The nano-zeolite-Y/CNS composite showed 80% conversion for hexadecane catalytic cracking into valuable olefins and hydrogen gas, which was 14% higher compared to that of pure nano-zeolite-Y particles.

Staff in the National Health Service (NHS) are under considerable strain, exacerbated by the COVID-19 pandemic; whilst NHS Trusts provide a variety of health and wellbeing support services, there has been little research investigating staff perceptions of these services. We interviewed 48 healthcare workers from 18 NHS Trusts in England about their experiences of workplace health and wellbeing support during the pandemic. Reflexive thematic analysis identified that perceived stigma around help-seeking, and staffing shortages due to wider socio-political contexts such as austerity, were barriers to using support services. Visible, caring leadership at all levels (CEO to line managers), peer support, easily accessible services, and clear communication about support offers were enablers. Our evidence suggests Trusts should have active strategies to improve help-seeking, such as manager training and peer support facilitated by building in time for this during working hours, but this will require long-term strategic planning to address workforce shortages.

Climate changes affect planet ecosystems, living beings, humans, including their lives, rights, economy, housing, migration, and both physical and mental health. Geo-psychiatry is a new discipline within the field of psychiatry studying the interface between various geo-political factors including geographical, political, economic, commercial and cultural determinants which affect society and psychiatry: it provides a holistic overview on global issues such as climate changes, poverty, public health and accessibility to health care. It identifies geopolitical factors and their effects at the international and national levels, as well as considers the politics of climate changes and poverty within this context. This paper then introduces the Compassion, Assertive Action, Pragmatism, and Evidence Vulnerability Index (CAPE-VI) as a global foreign policy index: CAPE-VI calculates how foreign aid should be prioritised for countries that are at risk or already considered to be fragile. These countries are characterised by various forms of conflict, disadvantaged by extremes of climate change, poverty, human rights abuses, and suffering from internal warfare or terrorism., Competing Interests: Conflicts of Interest Statement Authors were not precluded from accessing data in the manuscript, and they accept responsibility for submitting for publication. All authors do not have conflicts of interests to the writing of the manuscript or the decision to submit it for publication., (Copyright © 2023. Published by Elsevier B.V.)

Background: Major depressive disorder (MDD) is a highly burdensome health condition, for which there are numerous accepted pharmacological and psychological interventions. Adjunctive treatment (augmentation/combination) is recommended for the ~50% of MDD patients who do not adequately respond to first-line treatment. We aimed to evaluate the current evidence for concomitant approaches for people with early-stage treatment-resistant depression (TRD; defined below)., Methods: We systematically searched Medline and Institute for Scientific Information Web of Science to identify randomised controlled trials of adjunctive treatment of ⩾10 adults with MDD who had not responded to ⩾1 adequate antidepressant. The cochrane risk of bias (RoB) tool was used to assess study quality. Pre-post treatment meta-analyses were performed, allowing for comparison across heterogeneous study designs independent of comparator interventions., Results: In total, 115 trials investigating 48 treatments were synthesised. The mean intervention duration was 9 weeks (range 5 days to 18 months) with most studies assessed to have low ( n  = 57) or moderate ( n  = 51) RoB. The highest effect sizes (ESs) were from cognitive behavioural therapy (ES = 1.58, 95% confidence interval (CI): 1.09-2.07), (es)ketamine (ES = 1.48, 95% CI: 1.23-1.73) and risperidone (ES = 1.42, 95% CI: 1.29-1.61). Only aripiprazole and lithium were examined in ⩾10 studies. Pill placebo (ES = 0.89, 95% CI: 0.81-0.98) had a not inconsiderable ES, and only six treatments' 95% CIs did not overlap with pill placebo's (aripiprazole, (es)ketamine, mirtazapine, olanzapine, quetiapine and risperidone). We report marked heterogeneity between studies for almost all analyses., Conclusions: Our findings support cautious optimism for several augmentation strategies; although considering the high prevalence of TRD, evidence remains inadequate for each treatment option.

Background: Mental health is essential to students' academic success as well as their ability to participate fully and meaningfully throughout all aspects of their lives and throughout their lifespan., Aims: This study aims to determine the psychological health status of Moroccan nursing and technique health students. In doing so, it also seeks to compare differences based on sociodemographic factors., Method: A multicenter cross-sectional study with a convenience sample was conducted with 2,054 participants in the academic year of 2018/2019. A set of socio-demographic information were collected, and The General Health Questionnaire-12 (GHQ-12) was used., Results: The mean GHQ-12 score was 4.33 ± 2.61, and 58.7% respondents scored 4 and above in the GHQ-12 scores and thus were considered to be in psychological distress. Students' psychological distress was associated with female gender (60.4% for female compared to 52.4% for men, p = .003); living in parental residence (61.6% compared to 54.7% living away parental residence; p = .02 ), the second and the third training level year respectively (64.6%; 59.2%) compared to first-year (55.2%, p = .001), and midwifery and nursing students (61.6%; 60.3%) as compared to technique health students (43.6%, p = .001)., Conclusions: It appears that a substantial number of students have psychological distress and this is likely to have negative effects on students' educational attainment and wider wellbeing.

Background: Previous studies on the impact of the COVID-19 pandemic on the mental health of health-care workers have relied on self-reported screening measures to estimate the point prevalence of common mental disorders. Screening measures, which are designed to be sensitive, have low positive predictive value and often overestimate prevalence. We aimed to estimate prevalence of common mental disorders and post-traumatic stress disorder (PTSD) among health-care workers in England using diagnostic interviews., Methods: We did a two-phase, cross-sectional study comprising diagnostic interviews within a larger multisite longitudinal cohort of health-care workers (National Health Service [NHS] CHECK; n=23 462) during the COVID-19 pandemic. In the first phase, health-care workers across 18 NHS England Trusts were recruited. Baseline assessments were done using online surveys between April 24, 2020, and Jan 15, 2021. In the second phase, we selected a proportion of participants who had responded to the surveys and conducted diagnostic interviews to establish the prevalence of mental disorders. The recruitment period for the diagnostic interviews was between March 1, 2021 and Aug 27, 2021. Participants were screened with the 12-item General Health Questionnaire (GHQ-12) and assessed with the Clinical Interview Schedule-Revised (CIS-R) for common mental disorders or were screened with the 6-item Post-Traumatic Stress Disorder Checklist (PCL-6) and assessed with the Clinician Administered PTSD Scale for DSM-5 (CAPS-5) for PTSD., Findings: The screening sample contained 23 462 participants: 2079 participants were excluded due to missing values on the GHQ-12 and 11 147 participants due to missing values on the PCL-6. 243 individuals participated in diagnostic interviews for common mental disorders (CIS-R; mean age 42 years [range 21-70]; 185 [76%] women and 58 [24%] men) and 94 individuals participated in diagnostic interviews for PTSD (CAPS-5; mean age 44 years [23-62]; 79 [84%] women and 15 [16%] men). 202 (83%) of 243 individuals in the common mental disorders sample and 83 (88%) of 94 individuals in the PTSD sample were White. GHQ-12 screening caseness for common mental disorders was 52·8% (95% CI 51·7-53·8). Using CIS-R diagnostic interviews, the estimated population prevalence of generalised anxiety disorder was 14·3% (10·4-19·2), population prevalence of depression was 13·7% (10·1-18·3), and combined population prevalence of generalised anxiety disorder and depression was 21·5% (16·9-26·8). PCL-6 screening caseness for PTSD was 25·4% (24·3-26·5). Using CAPS-5 diagnostic interviews, the estimated population prevalence of PTSD was 7·9% (4·0-15·1)., Interpretation: The prevalence estimates of common mental disorders and PTSD in health-care workers were considerably lower when assessed using diagnostic interviews compared with screening tools. 21·5% of health-care workers met the threshold for diagnosable mental disorders, and thus might benefit from clinical intervention., Funding: UK Medical Research Council; UCL/Wellcome; Rosetrees Trust; NHS England and Improvement; Economic and Social Research Council; National Institute for Health and Care Research (NIHR) Biomedical Research Centre at the Maudsley and King's College London (KCL); NIHR Protection Research Unit in Emergency Preparedness and Response at KCL., Competing Interests: Declaration of interests SAMS is supported by the National Institute for Health and Care Research (NIHR) Maudsley Biomedical Research Centre at South London and Maudsley NHS Foundation Trust and an NIHR Advanced Fellowship. MH has received funding from the Innovative Medicines Initiative for the RADAR-CNS programme, a public-private pre-competitive consortium in mHealth, and his university received research funding from Janssen, Biogen, UCB, MSD, and Lundbeck. PM is supported by the NIHR Applied Research Collaboration (ARC; West) and the NIHR Biomedical Research Centre at University Hospitals Bristol, Weston NHS Foundation Trust, and the University of Bristol. NG has been an unpaid member of two NHS England expert advisory groups; and owns the company March on Stress, which is a psychological health consultancy providing mental health training to a wide range of organisations including the NHS. All other authors declare no competing interests., (Copyright © 2023 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND 4.0 license. Published by Elsevier Ltd.. All rights reserved.)

Background: Healthcare workers (HCWs) have provided vital services during the COVID-19 pandemic, but existing research consists of quantitative surveys (lacking in depth or context) or qualitative interviews (with limited generalisability). Structural Topic Modelling (STM) of large-scale free-text survey data offers a way of capturing the perspectives of a wide range of HCWs in their own words about their experiences of the pandemic., Methods: In an online survey distributed to all staff at 18 geographically dispersed NHS Trusts, we asked respondents, "Is there anything else you think we should know about your experiences of the COVID-19 pandemic?". We used STM on 7,412 responses to identify topics, and thematic analysis on the resultant topics and text excerpts., Results: We identified 33 topics, grouped into two domains, each containing four themes. Our findings emphasise: the deleterious effect of increased workloads, lack of PPE, inconsistent advice/guidance, and lack of autonomy; differing experiences of home working as negative/positive; and the benefits of supportive leadership and peers in ameliorating challenges. Themes varied by demographics and time: discussion of home working decreasing over time, while discussion of workplace challenges increased. Discussion of mental health was lowest between September-November 2020, between the first and second waves of COVID-19 in the UK., Discussion: Our findings represent the most salient experiences of HCWs through the pandemic. STM enabled statistical examination of how the qualitative themes raised differed according to participant characteristics. This relatively underutilised methodology in healthcare research can provide more nuanced, yet generalisable, evidence than that available via surveys or small interview studies, and should be used in future research., Competing Interests: MH, RR, and SW are senior NIHR Investigators. SW has received speaker fees from Swiss Re for two webinars on the epidemiological impact of COVID 19 pandemic on mental health. RR reports grants from DHSC/UKRI/ESRC COVID-19 Rapid Response Call, grants from Rosetrees Trust, grants from King’s Together rapid response call, grants from UCL (Wellcome Trust) rapid response call, during the conduct of the study; & grants from NIHR outside the submitted work. MH reports grants from DHSC/UKRI/ESRC COVID-19 Rapid Response Call, grants from Rosetrees Trust, grants from King’s Together rapid response call, grants from UCL Partners rapid response call, during the conduct of the study; grants from Innovative Medicines Initiative and EFPIA, RADAR-CNS consortium, grants from MRC, grants from NIHR, outside the submitted work. SS reports grants from UKRI/ESRC/DHSC, grants from UCL, grants from UKRI/MRC/DHSC, grants from Rosetrees Trust, grants from King’s Together Fund, and an NIHR Advanced Fellowship [ref: NIHR 300592] during the conduct of the study. NG reports a potential COI with NHSEI, during the conduct of the study; and I am the managing director of March on Stress Ltd which has provided training for a number of NHS organisations although I am not clear if the company has delivered training to any of the participating trusts or not as I do not get directly involved in commissioning specific pieces of work. DL is funded by the NIHR ARC North Thames. The views expressed in this publication are those of the authors and not necessarily those of the National Institute for Health Research or the Department of Health and Social Care. The views expressed are those of the authors and not necessarily those of the NHS, the NIHR, or the Department of Health and Social Care. Other authors report no competing interests. This does not alter our adherence to PLOS ONE policies on sharing data and materials.

Background: Breast cancer is becoming the most common cancer among women of Indian origin. However, little is known about the psychological impact of the disease and its treatment among this population., Aim: To improve understanding of psychological symptoms among Indian women with breast cancer., Design: This is a systematic literature review and critical interpretive synthesis. Medical Subject Headings(MeSH) terms and keywords for breast cancer, psychological symptoms and treatment were used to search databases from inception to 7 May 2019. The reference lists of the included articles were examined. Search results were screened against the inclusion criteria, data were extracted, and quality was appraised by two independent researchers with recourse to a third. Narrative (quantitative) and thematic qualitative syntheses were applied, followed by critical interpretive synthesis., Data Sources: ProQuest, MEDLINE, Ovid EMBASE, EBSCO, Cumulative Index to Nursing and Allied Health Literature, and PsycINFO., Results: 18 of 763 studies from India or Canada were included (13 quantitative, 5 qualitative). Critical interpretive synthesis found psychological concerns similar to 'Western' women, but were framed by the common culture of Indian women in either country. Family structure, religion and community appear to protect against and cause distress in relation to the expected core role of being a wife and a mother and the male dominance in decision making. Stigma was amplified by poor knowledge about the nature of cancer. Migrant Indian women had additional problems due to language barriers., Conclusions: Indian women with breast cancer living in India and Canada experience psychological morbidities which profoundly affect their role in their family and the wider community. Culturally congruent care, including accessible communication and information, may help prevent and alleviate distressing symptoms whether in India or in a migrant community., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2022. No commercial re-use. See rights and permissions. Published by BMJ.)

Competing Interests: We all contributed to the report discussed in this Comment and NC, DP, BR, SH, MW, and SG are affiliated to the UK All-Party Parliamentary Group on Global Health (APPG). DP is a non-executive director of a medicinal cannabis company called Kanabo unrelated to the topic of this Comment. BR is Chair of CORESS (Confidential Reporting Systems in Surgery) unrelated to the topic of this Comment. JL is Executive Director of Health Education England. The other authors declare no other competing interests. The following organisations sponsored the work of the APPG in the past 3 years: Health Education England, King's Health Partners, the Bill & Melinda Gates Foundation, the Burdett Trust for Nursing, the Institute of Global Health Innovation at Imperial College London, The Lancet, the London School of Hygiene & Tropical Medicine, the National Institute for Health and Clinical Excellence, the University of Edinburgh, the University of Oxford, the Wellcome Trust, and University College London. We liaised closely with Health Education England as they undertook their strategic framework for the future workforce. None of the funders had a role in collection, analysis, and interpretation of data and information, in the writing of the report or in this Comment.

Objectives: Concerns have been raised about the quantity and quality of research conducted during the COVID-19 pandemic, particularly related to the mental health and wellbeing of health care workers (HCWs). For understanding the volume, source, methodological rigour and degree of overlap in COVID-19, studies were conducted among HCWs in the United Kingdom (UK)., Study Design: Mixed methods approach, literature review and audit., Methods: First, a literature review of published research studies and second, an audit of studies HCWs have been invited to complete. For the literature review, we searched Medline, PsycINFO and Nexis, webpages of three medical organisations (Royal Society of Medicine, Royal College of Nursing and British Medical Association), and the YouGov website. For the audit, a non-random purposive sample of six HCWs from different London NHS Trusts reviewed email, WhatsApp and SMS messages they received for study invitations., Results: The literature review identified 27 studies; the audit identified 70 study invitations. Studies identified by the literature review were largely of poor methodological rigour: only eight studies (30%) provided response rate, one study (4%) reported having ethical approval, and one study (4%) reported funding details. There was substantial overlap in the topics measured. In the audit, volunteers received a median of 12 invitations. The largest number of study invitations were for national surveys (n = 23), followed by local surveys (n = 16) and research surveys (n = 8)., Conclusion: HCWs have been asked to complete numerous surveys that frequently have methodological shortcomings and overlapping aims. Many studies do not follow scientific good-practice and generate questionable, non-generalisable results., (Copyright © 2021 The Royal Society for Public Health. Published by Elsevier Ltd. All rights reserved.)

Objectives: This study reports preliminary findings on the prevalence of, and factors associated with, mental health and well-being outcomes of healthcare workers during the early months (April-June) of the COVID-19 pandemic in the UK., Methods: Preliminary cross-sectional data were analysed from a cohort study (n=4378). Clinical and non-clinical staff of three London-based NHS Trusts, including acute and mental health Trusts, took part in an online baseline survey. The primary outcome measure used is the presence of probable common mental disorders (CMDs), measured by the General Health Questionnaire. Secondary outcomes are probable anxiety (seven-item Generalised Anxiety Disorder), depression (nine-item Patient Health Questionnaire), post-traumatic stress disorder (PTSD) (six-item Post-Traumatic Stress Disorder checklist), suicidal ideation (Clinical Interview Schedule) and alcohol use (Alcohol Use Disorder Identification Test). Moral injury is measured using the Moray Injury Event Scale., Results: Analyses showed substantial levels of probable CMDs (58.9%, 95% CI 58.1 to 60.8) and of PTSD (30.2%, 95% CI 28.1 to 32.5) with lower levels of depression (27.3%, 95% CI 25.3 to 29.4), anxiety (23.2%, 95% CI 21.3 to 25.3) and alcohol misuse (10.5%, 95% CI 9.2 to 11.9). Women, younger staff and nurses tended to have poorer outcomes than other staff, except for alcohol misuse. Higher reported exposure to moral injury (distress resulting from violation of one's moral code) was strongly associated with increased levels of probable CMDs, anxiety, depression, PTSD symptoms and alcohol misuse., Conclusions: Our findings suggest that mental health support for healthcare workers should consider those demographics and occupations at highest risk. Rigorous longitudinal data are needed in order to respond to the potential long-term mental health impacts of the pandemic., Competing Interests: Competing interests: RoR reports grants from DHSC/UKRI/ESRC COVID-19 Rapid Response Call, grants from Rosetrees Trust, grants from King’s Together rapid response call, grants from UCL (Wellcome Trust) rapid response call, during the conduct of the study; grants from Innovative Medicines Initiative and EFPIA, RADAR-CNS consortium, grants from MRC, grants from NIHR, outside the submitted work. SH reports grants from NIHR, grants from Wellcome Trust, grants from ESRC, grants from Guy’s and St. Thomas’ Charity, grants from MRC, grants from UKRI, outside the submitted work; and a member of the following advisory groups: The Health Foundation – COVID-19 Research Programme Panel, NHS England and NHS Improvement – Patient and Carers Race Equalities Framework (PCREF) Steering Group, NHS England and NHS Improvement – Advancing Mental Health Equalities Taskforce, Health Education England – Mental Health Workforce Equalities Subgroup, Maudsley Learning – Maudsley Learning Advisory Board, South London and Maudsley NHS Foundation Trust (SLaM) – Independent Advisory Groups, the SLaM Partnership Group, Lambeth Public Health – Serious Youth Violence Public Health Task and Finish Group, NHS England – Workforce Race Equality Standard Advisory Group, Thrive London – Thrive London Advisory Board, Black Thrive – Black Thrive Advisory Board. Commissions: Welsh Government’s Race Equality Plan; contribution to the evidence review for Health and Social Care and Employment and Income policy areas. SAMS reports grants from UKRI/ESRC/DHSC, grants from UCL, grants from UKRI/MRC/DHSC, grants from Rosetrees Trust, grants from King’s Together Fund, during the conduct of the study. NG reports a potential COI with NHSEI, during the conduct of the study; and the managing director of March on Stress Ltd, which has provided training for a number of NHS organisations although NG is not clear if the company has delivered training to any of the participating trusts or not as NG does not get directly involved in commissioning specific pieces of work., (© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY. Published by BMJ.)

COVID-19 will cause normal feelings of worry and stress and many of those who experience higher levels of distress will experience resolution of their symptoms as society returns to pre-COVID-19 functioning. Only a minority are likely to develop a psychiatric disorder. Certain individuals may be vulnerable to experiencing persisting symptoms, such as those with pre-existing comorbidity. Management approaches could centre around using collaborative approaches to provide and build on already existing socioeconomic support structures, the avoidance of over-medicalisation, watchful waiting and finally treating those who do meet the criteria for psychiatric diagnosis. Primary care clinicians are likely be the first healthcare point of contact for most COVID-19 related distress and it is important that they are able to provide evidence based and evidence informed responses, which includes social, psychological and pharmacological approaches. This expert opinion paper serves to summarise some approaches, based primarily on indirect extrapolation of evidence concerning the general management of psychological distress, in the absence of COVID-19 specific evidence, to assist primary care clinicians in their assessment and management of COVID-19 related distress.

There is considerable evidence to suggest that individuals with mental illness as well as their carers and families are discriminated against across a number of domains. It is also well recognized that people with mental illness are likely to die younger than their counterparts who do not have mental illness. We propose that a Magna Carta is urgently needed to protect the rights of people with mental illness and help reduce discrimination. In this paper a background and rationale for this is offered alongside suggestions for reducing discrimination. The simple message is this; progress in health, economic, environmental and global development will not be made without improvements in mental health. The reasons are equally straightforward as mental illnesses cause more disability than any other health condition and bring enormous pain and suffering to individuals, their families and communities. These impacts lead to early death, damage to the economy and restrain individual progress. Every country needs to take urgent responsibility for defending the rights of individuals with mental illness.

Background: Opioids are essential medicines. Despite international and national laws permitting availability, opioid access remains inadequate, particularly in South, Southeast, East and Central Asia., Aim: To review evidence of perceptions and experiences of regulatory enablers and barriers to opioid access in South, Southeast, East and Central Asia., Design: Systematic review of post-2000 research according to PRISMA guidelines. Data were subjected to critical interpretive synthesis. International, national and sub-national barriers were organised developing a conceptual framework of opioid availability., Data Sources: PsycINFO, Medline, Embase, The Cochrane Library. CINAHL, Complete and ASSIA from 2000 until 20th May 2019., Results: 21/14097 studies included: quantitative n  = 15, qualitative n  = 3 and mixed-methods n  = 3. Four barrier/enabler themes were developed: Legal, regulatory, socio-political; lack of laws explicitly enabling opioid access, restrictive international controls and clinician prescribing concerns. Opioid availability; limited availability, poor policymaker and clinician education regarding opioid benefits, poor continuity of supply. Opioid Accessibility; medicine costs, distance to prescribing centres. Prescribing; extensive bureaucratic barriers, lack of human resources for prescribing. We present a novel framework of a self-perpetuating model of inadequate opioid provision. The Single Convention on Narcotics provides the context of restrictive laws and negative attitudes amongst policymakers. A consequent lack of prescribers and clinicians' negative attitudes at sub-national levels, results in inadequate access to and use of opioids. Data of inadequate consumption informs annual requirement estimates used by the International Narcotics Control Board to determine future opioid availability., Conclusions: Regulatory and socio-political actions unintentionally limit opioid access. International and national laws explicitly enabling opioid access are required, to assuage concerns, promote training and appropriate prescribing.

Competing Interests: Competing interests: We have read and understood BMJ policy on declaration of interests and have the following interests to declare: NG runs a psychological health consultancy that provides resilience training for a wide range of organisations, including a few NHS teams. The work was supported by the National Institute for Health Research (NIHR) Health Protection Research Unit in Emergency Preparedness and Response at King’s College London, in partnership with Public Health England and in collaboration with the University of East Anglia and Newcastle University. The views expressed are those of the authors and not necessarily those of the NHS, NIHR, Department of Health and Social Care, or Public Health England.

The issues raised by noncommunicable diseases (NCDs) during and after disasters are a challenge to equity within local communities, as well as between countries. Individuals with NCDs are particularly vulnerable in disasters and their aftermath given health systems are disrupted. Although welcome progress has been made in taking NCDs and equity into account in the UN General Assembly ratified agreement, the Sendai Framework for disaster risk reduction 2015-2030, there is need now for a clear plan of implementation., (Copyright © 2016 Ministry of Health, Saudi Arabia. Published by Elsevier Ltd. All rights reserved.)

We are pleased to know that now the RCN is not completely rejecting the Department of Health proposal to introduce nursing associate roles.

A Panicum maximum cell suspension was used to study ultrastructural changes during cryopreservation. Pregrowing the cells in mannitol caused reduction in the vacuolar volume by redistribution of the large central vacuole into a number of smaller vesicles. Invaginations were formed in the plasma membrane of the cells, to accommodate the reduced cell volume. Swelling of organelles occurred during different stages of cryopreservation. The cisternae of the endoplasmic reticulum dilated and formed vesicles. Although some damage was apparent, organelles were still recognizable in cells frozen slowly and freeze-fixed at -10°C. The cells were able to repair such damage within two days in culture, and regained their normal appearance. Cells frozen slowly without any cryoprotection, and cells frozen rapidly by direct immersion into liquid nitrogen after cryoprotection, were lethally damaged by destruction of membranous structures. Osmiophilic granules were found along the plasma membrane of lethally damaged cells, indicating that their formation is a consequence of freeze damage, rather than a mechanism to prevent injury.

Efficient plant regeneration was obtained from a cryopreserved embryogenic cell suspension of sugarcane established from leaf derived callus. Pregrowing the cells for three days in MS basal medium supplemented with 0.33 M sorbitol was essential to the process. The cells were cooled at a rate of 0.5°C/min to -40°C and then stored in liquid nitrogen. Thawing was carried out rapidly in water at +40°C, and the cells were then plated without washing onto filter paper discs placed on a semi-solid regeneration medium (MS basal + 3% sucrose + 0.13 mg/1 2,4-D +0.25 mg/1 BAP + 0.25 mg/1 kinetin + 0.25 mg/1 zeatin). The filter paper discs, along with the cells, were transferred to the same, fresh medium after five hours. After 24 hours the cells were scraped off, placed on fresh semi-solid medium and incubated at 28°C in the dark for two weeks before transfer to light. A regeneration efficiency of 92% was obtained (regenerated plants, expressed as a percent of unfrozen control). Plants regenerated from cryopreserved cells, and grown to maturity in the greenhouse, were morphologically identical to regenerated control plants.