Losing ground: projections of climate-driven bloom shifts and their implications for the future of California's almond orchards.

Climate change is expected to impact the spring phenology of perennial trees, potentially altering the suitability of land for their cultivation. In this study, we investigate the effects of climate change on the bloom timing of almond orchards, focusing on California, the world's leading region for almond production. By analyzing historical climatic data, employing a model that considers hourly temperatures and fall non-structural carbohydrates to predict bloom dates, and examining various Coupled Model Intercomparison Project Phase 6 (CMIP6) scenarios, we assess the potential impacts of climate shifts on plant phenology and, consequently, on land suitability for almond farming. Our findings reveal that, within the next 30 years, the land suitable for almond production will not undergo significant changes. However, under unchanged emission scenarios, the available land to support almond orchard farming could decline between 48 to 73% by the end of the century. This reduction corresponds with an early shift in bloom time from the average Day of Year (DOY) 64 observed over the past 40 years to a projected earlier bloom between DOY 28-33 by 2100. These results emphasize the critical role climate shifts have in shaping future land use strategies for almond production in Central Valley, California. Consequently, understanding and addressing these factors is essential for the sustainable management and preservation of agricultural land, ensuring long-term food security and economic stability in the face of a rapidly changing climate.

Pilgrimage in pediatric palliative care: The journey of caregivers.

Admission of terminally ill patients into pediatric palliative care remains a challenge in Mexico and Latin America, despite the multiple benefits of early transfer. In this context the trajectories in search of health care of patients and caregivers have not been documented. Therefore, the objective of this study was to describe and analyze the experiences of primary caregivers and family members of pediatric patients in the palliative care unit of a Children's Hospital in Mexico, between October 19, 2019, and January 19, 2022. We used the framework of health pilgrimage, which comprises the transformative search of healing for patients, focusing on health barriers and the necessary displacement in search of care. With information obtained through interviews, we reconstructed the pilgrimages in search of health care navigating the Mexican healthcare system. Furthermore, we describe the experience of the primary caregiver accompanying the sick child during their journey to palliative care. We recount the adverse factors associated with this pilgrimage, such as the emotional and socioeconomic impact on primary and secondary caregivers.

Ethics in infectious diseases: latent challenges. Part I / Ética en enfermedades infecciosas: retos latentes. Parte I

Abstract Infectious diseases socially imply individual and community medical problems. Therefore, they require actions aimed at social processes that affect the well-being of the individuals without losing sight of social groups. Faced with this panorama, we ask ourselves: is there a direct relationship between ethics and infectious diseases? To elucidate an answer, let us remember the peak period of the COVID-19 pandemic when guidelines based on ethical principles were issued to facilitate medical decisions on allocating scarce resources in periods of maximum demand. In those moments, since there was no inclusive component of society, the decisions made produced massive criticism. The reactions demonstrated the need to analyze in detail the criteria that had been considered correct. Consequently, we affirm that bioethical principles are transcendental in medical decisions and must be examined, not only for the individual but also with a view to public health. Moreover, the acquired immunodeficiency syndrome (AIDS) epidemic has lived with us for decades, and it continues to show its tragic face in the form of new cases, chronic illnesses, and deaths. Joint United Nations Programme on HIV/AIDS brings us closer to a complex reality where the fight against disease and global health are interrelated with other problems, such as the need to reduce inequality, for which human rights, gender equality, social protection, and the development of research projects, where the ethics committees in research in community processes are constituents.

Resumen Las enfermedades infecciosas implican problemas médicos individuales y comunitarios, por lo que requieren acciones dirigidas a procesos sociales que incidan en el bienestar de los individuos, sin perder de vista a los grupos sociales. Nos preguntamos: ¿existe relación directa entre la ética y las enfermedades infecciosas? Para dilucidar una respuesta, recordemos el periodo más álgido de la pandemia por COVID-19, cuando se emitieron guías fundamentadas en principios éticos para facilitar las decisiones médicas en la asignación de recursos escasos en periodos de máxima demanda. Al no haber un componente inclusivo con la sociedad, las decisiones que se tomaron produjeron críticas masivas, que demostraron la necesidad de analizar a detalle los criterios que se habían considerado correctos. En consecuencia, afirmamos que los principios bioéticos son trascendentales en las decisiones médicas y deben ser examinados, no solo frente al individuo, sino de cara a la salud pública (bien común e individualidad). Por otra parte, la epidemia del SIDA (síndrome de inmunodeficiencia adquirida) convive con nosotros desde hace décadas. ONUSIDA (Programa Conjunto de las Naciones Unidas sobre el VIH/SIDA) nos acerca una realidad compleja, como es que la lucha contra la enfermedad y por la salud global se interrelaciona con otros problemas como la necesidad de reducer la desigualdad, por los derechos humanos, la igualdad de género, la protección social y el desarrollo de proyectos de investigación, donde los comités de Ética en investigación en procesos comunitarios son constituyentes.

Vulnerability in women primary caregivers of children in palliative care due to intimate partner violence in a pediatric hospital in Mexico / Vulnerabilidad en mujeres cuidadoras primarias de menores en cuidados paliativos debida a violencia de pareja en un hospital de niños en México

Abstract Background: Women are the primary caregivers of children in palliative care. Research has shown that the presence of intimate partner violence at home exacerbates the vulnerability of the caregiver. Current statistics indicate a high prevalence of violence in Mexico present in the intersectionality between intimate partner violence and the role of the primary caregiver. This study aimed to describe the frequency of intimate partner violence among primary palliative caregivers at the Hospital Infantil de México Federico Gómez. Methods: We conducted a cross-sectional and prospective study with convenience sampling; no sample calculation was performed. All female primary caregivers of children in the palliative care unit were invited to participate. The Scale of Violence and Index of Severity of Violence was used as the measuring instrument. Results: One hundred women participated in the study by submitting their survey in a designated mailbox. No sociodemographic data or patient diagnoses were collected. The frequency of intimate partner violence was 28%, of which 16% were considered severe cases. Women reported psychological violence (36%), sexual violence (23%), and physical violence (22%). Conclusions: Almost one-third of female primary caregivers of pediatric patients at the Hospital Infantil de México Federico Gómez have been victims of some form of violence by current partners. This study highlights a previously unreported problem and opens the door for studies to correlate intimate partner violence among primary caregivers and the quality of life of children in palliative care.

Resumen Introducción: Las mujeres son las principales cuidadoras de los niños en cuidados paliativos. Las investigaciones han demostrado que la violencia de pareja en el hogar exacerba la vulnerabilidad del cuidador. Las estadísticas actuales sobre violencia en México indican una alta prevalencia presente en la interseccionalidad entre la violencia de pareja y el rol de cuidador principal. El objetivo de este estudio fue describir la frecuencia de violencia de pareja entre los cuidadores primarios del Hospital Infantil de México Federico Gómez (HIMFG). Métodos: Se llevó a cabo un estudio transversal y prospectivo con muestreo por conveniencia; no se realizó ningún cálculo de muestra. Se invitó a participar a todas las mujeres cuidadoras primarias de niños en la Unidad de Cuidados Paliativos. Se utilizó como instrumento la Escala de Violencia e Índice de Severidad de la Violencia. Resultados: Cien mujeres participaron en el estudio; no se recogieron sus datos sociodemográficos ni diagnósticos. La frecuencia de violencia de pareja fue del 28%: 16% se consideraron casos graves. Las mujeres reportaron violencia psicológica (36%), violencia sexual (23%) y violencia física (22%). Conclusiones: Alrededor de la tercera parte de las mujeres cuidadoras principales de pacientes pediátricos del HIMFG han sido víctimas de algún tipo de violencia por parte de sus parejas actuales. Este estudio destaca un problema no informado previamente y abre la puerta a estudios para correlacionar la violencia de pareja íntima entre los cuidadores primarios y la calidad de vida de los niños en cuidados paliativos.

Ethics in infectious diseases: latent challenges. Part I.

Infectious diseases socially imply individual and community medical problems. Therefore, they require actions aimed at social processes that affect the well-being of the individuals without losing sight of social groups. Faced with this panorama, we ask ourselves: is there a direct relationship between ethics and infectious diseases? To elucidate an answer, let us remember the peak period of the COVID-19 pandemic when guidelines based on ethical principles were issued to facilitate medical decisions on allocating scarce resources in periods of maximum demand. In those moments, since there was no inclusive component of society, the decisions made produced massive criticism. The reactions demonstrated the need to analyze in detail the criteria that had been considered correct. Consequently, we affirm that bioethical principles are transcendental in medical decisions and must be examined, not only for the individual but also with a view to public health. Moreover, the acquired immunodeficiency syndrome (AIDS) epidemic has lived with us for decades, and it continues to show its tragic face in the form of new cases, chronic illnesses, and deaths. Joint United Nations Programme on HIV/AIDS brings us closer to a complex reality where the fight against disease and global health are interrelated with other problems, such as the need to reduce inequality, for which human rights, gender equality, social protection, and the development of research projects, where the ethics committees in research in community processes are constituents.

Las enfermedades infecciosas implican problemas médicos individuales y comunitarios, por lo que requieren acciones dirigidas a procesos sociales que incidan en el bienestar de los individuos, sin perder de vista a los grupos sociales. Nos preguntamos: ¿existe relación directa entre la ética y las enfermedades infecciosas? Para dilucidar una respuesta, recordemos el periodo más álgido de la pandemia por COVID-19, cuando se emitieron guías fundamentadas en principios éticos para facilitar las decisiones médicas en la asignación de recursos escasos en periodos de máxima demanda. Al no haber un componente inclusivo con la sociedad, las decisiones que se tomaron produjeron críticas masivas, que demostraron la necesidad de analizar a detalle los criterios que se habían considerado correctos. En consecuencia, afirmamos que los principios bioéticos son trascendentales en las decisiones médicas y deben ser examinados, no solo frente al individuo, sino de cara a la salud pública (bien común e individualidad). Por otra parte, la epidemia del SIDA (síndrome de inmunodeficiencia adquirida) convive con nosotros desde hace décadas. ONUSIDA (Programa Conjunto de las Naciones Unidas sobre el VIH/SIDA) nos acerca una realidad compleja, como es que la lucha contra la enfermedad y por la salud global se interrelaciona con otros problemas como la necesidad de reducer la desigualdad, por los derechos humanos, la igualdad de género, la protección social y el desarrollo de proyectos de investigación, donde los comités de Ética en investigación en procesos comunitarios son constituyentes.

Vulnerability in women primary caregivers of children in palliative care due to intimate partner violence in a pediatric hospital in Mexico.

BACKGROUND: Women are the primary caregivers of children in palliative care. Research has shown that the presence of intimate partner violence at home exacerbates the vulnerability of the caregiver. Current statistics indicate a high prevalence of violence in Mexico present in the intersectionality between intimate partner violence and the role of the primary caregiver. This study aimed to describe the frequency of intimate partner violence among primary palliative caregivers at the Hospital Infantil de México Federico Gómez. METHODS: We conducted a cross-sectional and prospective study with convenience sampling; no sample calculation was performed. All female primary caregivers of children in the palliative care unit were invited to participate. The Scale of Violence and Index of Severity of Violence was used as the measuring instrument. RESULTS: One hundred women participated in the study by submitting their survey in a designated mailbox. No sociodemographic data or patient diagnoses were collected. The frequency of intimate partner violence was 28%, of which 16% were considered severe cases. Women reported psychological violence (36%), sexual violence (23%), and physical violence (22%). CONCLUSIONS: Almost one-third of female primary caregivers of pediatric patients at the Hospital Infantil de México Federico Gómez have been victims of some form of violence by current partners. This study highlights a previously unreported problem and opens the door for studies to correlate intimate partner violence among primary caregivers and the quality of life of children in palliative care.

INTRODUCCIÓN: Las mujeres son las principales cuidadoras de los niños en cuidados paliativos. Las investigaciones han demostrado que la violencia de pareja en el hogar exacerba la vulnerabilidad del cuidador. Las estadísticas actuales sobre violencia en México indican una alta prevalencia presente en la interseccionalidad entre la violencia de pareja y el rol de cuidador principal. El objetivo de este estudio fue describir la frecuencia de violencia de pareja entre los cuidadores primarios del Hospital Infantil de México Federico Gómez (HIMFG). MÉTODOS: Se llevó a cabo un estudio transversal y prospectivo con muestreo por conveniencia; no se realizó ningún cálculo de muestra. Se invitó a participar a todas las mujeres cuidadoras primarias de niños en la Unidad de Cuidados Paliativos. Se utilizó como instrumento la Escala de Violencia e Índice de Severidad de la Violencia. RESULTADOS: Cien mujeres participaron en el estudio; no se recogieron sus datos sociodemográficos ni diagnósticos. La frecuencia de violencia de pareja fue del 28%: 16% se consideraron casos graves. Las mujeres reportaron violencia psicológica (36%), violencia sexual (23%) y violencia física (22%). CONCLUSIONES: Alrededor de la tercera parte de las mujeres cuidadoras principales de pacientes pediátricos del HIMFG han sido víctimas de algún tipo de violencia por parte de sus parejas actuales. Este estudio destaca un problema no informado previamente y abre la puerta a estudios para correlacionar la violencia de pareja íntima entre los cuidadores primarios y la calidad de vida de los niños en cuidados paliativos.

Antibiotics in the end-of-life phase in pediatric oncological patients with a diagnosis of terminal illness: a dilemma.

BACKGROUND: Pediatric cancer patients in the final phase of life receive antibiotics empirically. The decision to start, maintain, or stop the antibiotic administration as part of care at this stage is a dilemma. METHODS: We conducted a retrospective, descriptive, cross-sectional study including cancer patients in the final phase of life, hospitalized during the last 5 to 7 days of life. We included demographic variables, diagnoses, days of hospitalization, cultures, antibiotics used, prevalent symptoms in the last week of life, and principal diagnosis at the time of death, and performed descriptive statistics and a chord diagram. RESULTS: Twenty-two patients were included; 18 (81.81%) received antibiotic treatment. The mean age was 8.75 years. The predominant pathologies were central nervous system tumors in seven patients (31.81%). Of the total, 18 (81.81%) had an infectious diagnosis reported as bloodstream infection, followed by pneumonia in three (13.63%). The main cause of death was respiratory failure (40.9%). Of the 18 patients with an infectious diagnosis, 16 (88.88%) received empiric therapy. Predominant factors for antibiotic use were more than 7 days of hospitalization (75%), ICU admission (100%), invasive devices (88.8%), and aminergic support (100%). The predominant symptoms were dyspnea (68.18%), pain (50%), and fever (40.9%), which persisted in nine (60%), two (18.18%), and five (55.5%) patients, respectively. CONCLUSIONS: The lack of guidelines for antibiotic administration leads to excessive and potentially unnecessary use, which can lead to discomfort, prolonged hospitalization, bacterial resistance, excessive cost, and suffering without symptom control.

INTRODUCCIÓN: Los pacientes pediátricos oncológicos en la fase final de vida reciben antibióticos de forma empírica. La decisión de iniciar, mantener o suspender la administración del antibiótico como parte del cuidado en esta etapa es un dilema. MÉTODOS: Se llevó a cabo un estudio retrospectivo, descriptivo y transversal que incluyó pacientes oncológicos en fase final de vida, hospitalizados durante los últimos 5 a 7 días de vida. Se incluyeron variables demográficas, diagnósticos, días de estancia hospitalaria, cultivos, antibióticos utilizados, síntomas prevalentes en la última semana de vida y diagnóstico principal al momento de fallecer. Se realizó estadística descriptiva y un gráfico de cuerdas. RESULTADOS: Se incluyeron 22 pacientes: 18 (81.81%) recibieron manejo antibiótico. La media de edad fue de 8.75 años. Las patologías predominantes fueron tumores de sistema nervioso central en siete pacientes (31.81%). Del total, 18 (81.81%) pacientes presentaron infección del torrente sanguíneo; tres (13.63%) presentaron neumonía. La principal causa de muerte fue insuficiencia respiratoria (40.9%). De los 18 pacientes con diagnóstico infeccioso, 16 (88.88%) recibieron terapia empírica. Los factores prevalentes para el uso antibiótico fueron una estancia hospitalaria mayor a 7 días (75%), hospitalización en Unidad de Cuidados Intensivos (100%), dispositivos invasivos (88.8%) y apoyo aminérgico (100%). El síntoma prevalente fue disnea (68.18%), dolor (50%) y fiebre (40.9%), mismos que persistieron en nueve (60%), dos (18.18%) y cinco pacientes (55.5%), respectivamente. CONCLUSIONES: La falta de pautas respecto a la administración de antibióticos conlleva a su uso excesivo y potencialmente innecesario, lo cual puede ocasionar incomodidad, prolongar la hospitalización, resistencia bacteriana, costos excesivos y sufrimiento, sin control de los síntomas.

Antibiotics in the end-of-life phase in pediatric oncological patients with a diagnosis of terminal illness: a dilemma / Uso de antibióticos en niños con patología oncológica en la fase final de vida: el dilema

Abstract Background: Pediatric cancer patients in the final phase of life receive antibiotics empirically. The decision to start, maintain, or stop the antibiotic administration as part of care at this stage is a dilemma. Methods: We conducted a retrospective, descriptive, cross-sectional study including cancer patients in the final phase of life, hospitalized during the last 5 to 7 days of life. We included demographic variables, diagnoses, days of hospitalization, cultures, antibiotics used, prevalent symptoms in the last week of life, and principal diagnosis at the time of death, and performed descriptive statistics and a chord diagram. Results: Twenty-two patients were included; 18 (81.81%) received antibiotic treatment. The mean age was 8.75 years. The predominant pathologies were central nervous system tumors in seven patients (31.81%). Of the total, 18 (81.81%) had an infectious diagnosis reported as bloodstream infection, followed by pneumonia in three (13.63%). The main cause of death was respiratory failure (40.9%). Of the 18 patients with an infectious diagnosis, 16 (88.88%) received empiric therapy. Predominant factors for antibiotic use were more than 7 days of hospitalization (75%), ICU admission (100%), invasive devices (88.8%), and aminergic support (100%). The predominant symptoms were dyspnea (68.18%), pain (50%), and fever (40.9%), which persisted in nine (60%), two (18.18%), and five (55.5%) patients, respectively. Conclusions: The lack of guidelines for antibiotic administration leads to excessive and potentially unnecessary use, which can lead to discomfort, prolonged hospitalization, bacterial resistance, excessive cost, and suffering without symptom control.

Resumen Introducción: Los pacientes pediátricos oncológicos en la fase final de vida reciben antibióticos de forma empírica. La decisión de iniciar, mantener o suspender la administración del antibiótico como parte del cuidado en esta etapa es un dilema. Métodos: Se llevó a cabo un estudio retrospectivo, descriptivo y transversal que incluyó pacientes oncológicos en fase final de vida, hospitalizados durante los últimos 5 a 7 días de vida. Se incluyeron variables demográficas, diagnósticos, días de estancia hospitalaria, cultivos, antibióticos utilizados, síntomas prevalentes en la última semana de vida y diagnóstico principal al momento de fallecer. Se realizó estadística descriptiva y un gráfico de cuerdas. Resultados: Se incluyeron 22 pacientes: 18 (81.81%) recibieron manejo antibiótico. La media de edad fue de 8.75 años. Las patologías predominantes fueron tumores de sistema nervioso central en siete pacientes (31.81%). Del total, 18 (81.81%) pacientes presentaron infección del torrente sanguíneo; tres (13.63%) presentaron neumonía. La principal causa de muerte fue insuficiencia respiratoria (40.9%). De los 18 pacientes con diagnóstico infeccioso, 16 (88.88%) recibieron terapia empírica. Los factores prevalentes para el uso antibiótico fueron una estancia hospitalaria mayor a 7 días (75%), hospitalización en Unidad de Cuidados Intensivos (100%), dispositivos invasivos (88.8%) y apoyo aminérgico (100%). El síntoma prevalente fue disnea (68.18%), dolor (50%) y fiebre (40.9%), mismos que persistieron en nueve (60%), dos (18.18%) y cinco pacientes (55.5%), respectivamente. Conclusiones: La falta de pautas respecto a la administración de antibióticos conlleva a su uso excesivo y potencialmente innecesario, lo cual puede ocasionar incomodidad, prolongar la hospitalización, resistencia bacteriana, costos excesivos y sufrimiento, sin control de los síntomas.

Veterinary pharmaceutical as emerging contaminants in wastewater and surface water: An overview.

Veterinary pharmaceuticals have become of interest due to their indiscriminate use. Thus, this paper compiles studies on detection in surface and wastewater, and the treatment applied for their removal. Additionally, a case study was performed to evaluate its commercialization, as the ecological risk assessment for the most relevant compounds. 241 compounds were detected. The highest concentrations were found for antibiotics such as oxytetracycline, amoxicillin, and monensin, with values up to 3732.4 µg/L. Biological treatments have been mainly reported, obtaining removal greater than 80% for sulfadiazine, sulfamethazine, sulfamethoxazole, enrofloxacin, and oxytetracycline. Considering the case study, enrofloxacin and oxytetracycline were widely commercialized. Finally, there was a low risk for the species exposed to enrofloxacin, in contrast, the species exposed to oxytetracycline presented a high risk of long-term mortality. Concluding that veterinary compounds have emerged as a significant concern regarding water source contamination, owing to their potential adverse effects on aquatic biota and even human. This is particularly relevant because many water bodies that receive wastewater are utilized for drinking water purposes. Consequently, the development of comprehensive, full-scale systems for efficient antibiotic removal before their introduction into water sources becomes imperative. Equally important is the need to reconsider their extensive use altogether.

Shoot dimorphism enables Sequoia sempervirens to separate requirements for foliar water uptake and photosynthesis.

PREMISE: Trees in wet forests often have features that prevent water films from covering stomata and inhibiting gas exchange, while many trees in drier environments use foliar water uptake to reduce water stress. In forests with both wet and dry seasons, evergreen trees would benefit from producing leaves capable of balancing rainy-season photosynthesis with summertime water absorption. METHODS: Using samples collected from across the vertical gradient in tall redwood (Sequoia sempervirens) crowns, we estimated tree-level foliar water uptake and employed physics-based causative modeling to identify key functional traits that determine uptake potential by setting hydraulic resistance. RESULTS: We showed that Sequoia has two functionally distinct shoot morphotypes. While most shoots specialize in photosynthesis, the axial shoot type is capable of much greater foliar water uptake, and its within-crown distribution varies with latitude. A suite of leaf surface traits cause hydraulic resistance, leading to variation in uptake capacity among samples. CONCLUSIONS: Shoot dimorphism gives tall Sequoia trees the capacity to absorb up to 48 kg H2 O h-1 during the first hour of leaf wetting, ameliorating water stress while presumably maintaining high photosynthetic capacity year round. Geographic variation in shoot dimorphism suggests that plasticity in shoot-type distribution and leaf surface traits helps Sequoia maintain a dominate presence in both wet and dry forests.

The impact of non-structural carbohydrates (NSC) concentration on yield in Prunus dulcis, Pistacia vera, and Juglans regia.

Successful yield in orchards is the culmination of a series of events that start with plants entering dormancy with adequate energy reserves (non-structural carbohydrates; NSC). These NSC are responsible for the maintenance of activities during dormancy and extending onto the period of activeness. Using multi-year yield information and monthly NSC content in twigs, we show that high levels of carbohydrate in Prunus dulcis, Pistachio vera, and Juglans regia during the winter months are indeed associated with high yield, while high levels of the NSC in late summer often correlate with low yield. An evaluation of monthly NSC level importance on yield revealed that for P. dulcis high levels in February were a good predictor of yield and that low levels throughout summer were associated with high yield. In P. vera, high levels of NSC in December were best predictors of yield. J. regia exhibited peculiar patterns; while high pre-budbreak reserves were associated with high yields they only played a minor role in explaining crop, the most important months for predicting yields were June and July. Results suggest that NSC levels can serve as good predictors of orchard yield potential and should be monitored to inform orchard management.

Do the ends justify the means? Impact of drought progression rate on stress response and recovery in Vitis vinifera.

Plants are frequently exposed to prolonged and intense drought events. To survive, species must implement strategies to overcome progressive drought while maintaining sufficient resources to sustain the recovery of functions. Our objective was to understand how stress rate development modulates energy reserves and affects the recovery process. Grenache Vitis vinifera cultivar was exposed to either fast-developing drought (within few days; FDD), typical of pot experiments, or slow-developing drought (few weeks, SDD), more typical for natural conditions. FDD was characterized by fast (2-3 days) stomatal closure in response to increased stress level, high abscisic acid (ABA) accumulation in xylem sap (>400 µg L-1 ) without the substantial changes associated with stem priming for recovery (no accumulation of sugar or drop in xylem sap pH). In contrast, SDD was characterized by gradual stomatal closure, low ABA accumulation (<100 µg L-1 ) and changes that primed the stem for recovery (xylem sap acidification from 6 to 5.5 pH and sugar accumulation from 1 to 3 g L-1 ). Despite FDD and SDD demonstrating similar trends over time in the recovery of stomatal conductance, they differed in their sensitivity to xylem ABA. Grenache showed near-isohydric and near-anisohydric behavior depending on the rate of drought progression, gauging the risk between hydraulic integrity and photosynthetic gain. The isohydry observed during FDD could potentially provide protection from large sudden swings in tension, while transitioning to anisohydry during SDD could prioritize the maintenance of photosynthetic activity over hydraulic security.

Spring phenology is affected by fall non-structural carbohydrate concentration and winter sugar redistribution in three Mediterranean nut tree species.

Deciduous trees mostly rely on non-structural carbohydrates (NSC-soluble carbohydrates and starch) stored prior to dormancy to sustain both spring bloom and the initial phase of spring growth prior to the transition of leaves from sink to source. Winter management of NSC, their loss due to respiration, reallocation patterns and remobilization during spring, seems to be key to a timely and synchronous bloom. To assess tree dependence on NSC during dormancy, we tested whether the interruption of local branch NSC accumulation prior to dormancy by defoliation and the interruption of NSC translocation by phloem girdling influence spring phenology in three major deciduous Mediterranean nut crop species: Prunus dulcis (Mill.) D.A Webb, a hybrid between Pistacia integerrima (J. L. Stewart ex Brandis) and P. atlantica Desf. (referred to as P. integerrima), and Juglans regia L. Defoliation treatments had different effects on NSC concentration in different species depending on the time of application. However, despite the significant initial impact (increase or decrease of NSC concentration), with time this impact diminished resulting in overall similar concentrations between control and defoliated branches suggesting the presence of NSC reallocation during dormancy. Phloem girdling in P. dulcis and P. integerrima resulted in reduced export activity and greater NSC concentrations, while in J. regia girdling resulted in lower NSC concentrations, indicating that this species requires a net import of NSC during dormancy. Bud break was distinctly delayed by both defoliation and phloem girdling in all the three species, providing evidence of the significant roles that fall NSC accumulation and winter NSC management play in priming trees for spring growth resumption.

Psychosocial and economic impact of rheumatic diseases on caregivers of Mexican children.

BACKGROUND: Pediatric rheumatic disease (PRD) patients and their caregivers face a number of challenges, including the consequences of the PRD in patients and the impact on multiple dimensions of the caregivers' daily lives. The objective of this study is to measure the economic, psychological and social impact that PRD has on the caregivers of Mexican children. METHODS: This is a multicenter, cross-sectional study including primary caregivers of children and adolescents with PRD (JIA, JDM and JSLE) during April and November, 2019. A trained interviewer conducted the CAREGIVERS questionnaire, a specific, 28-item multidimensional tool validated to measure the impact on different dimensions of the lives of caregivers. Sociodemographic, clinical, and healthcare system data were collected for further analysis. RESULTS: Two hundred participants were recruited (women 169, 84.5%, aged 38 [IQR 33-44] years); 109 (54.5%) cared for patients with JIA, 28 (14%) JDM and 63 (31.5%) JSLE. The healthcare system was found to be determinant on the impact of the disease. The emotional impact was higher in all the participants, regardless of the specific diagnoses. The social dimension showed significant differences regarding PRD, healthcare system, time to reach the center, presence of disability, active disease, cutaneous and systemic manifestations, treatment and partner. Financial and work impacts were more frequent in those caring for JSLE and less so in those with a partner. Family relationships changed in 81 caregivers (25 [12.5%] worsened and 56 [28%] improved). No variables affecting spirituality were found. For caregivers without a partner, the social networks impact increased. CONCLUSION: The influence of sociodemographic factors can be devastating on families with children with a PRD. These data will help physicians to identify the areas with the greatest need for intervention to achieve comprehensive care for caregivers and their patients.

Zika and dengue but not chikungunya are associated with Guillain-Barré syndrome in Mexico: A case-control study.

Background Zika, dengue and chikungunya viruses (ZIKV, CHIKV and DENV) are temporally associated with neurological diseases, such as Guillain-Barré syndrome (GBS). Because these three arboviruses coexist in Mexico, the frequency and severity of GBS could theoretically increase. This study aims to determine the association between these arboviruses and GBS in a Mexican population and to establish the clinical characteristics of the patients, including the severity of the infection. A case-control study was conducted (2016/07/01-2018/06/30) in Instituto Mexicano del Seguro Social (Mexican Social Security Institute) hospitals, using serum and urine samples that were collected to determine exposure to ZIKV, DENV, CHIKV by RT-qPCR and serology (IgM). For the categorical variables analysis, Pearson's χ2 or Fisher exact tests were used, and the Mann-Whitney U test for continuous variables. To determine the association of GBS and viral infection diagnosis through laboratory and symptomatology before admission, we calculated the odds ratio (OR) and 95% confidence intervals (95%CI) using a 2x2 contingency table. A p-value ≤ 0.05 was considered as significant. Ninety-seven GBS cases and 184 controls were included. The association of GBS with ZIKV acute infection (OR, 8.04; 95% CI, 0.89-73.01, p = 0.047), as well as laboratory evidence of ZIKV infection (OR, 16.45; 95% CI, 2.03-133.56; p = 0.001) or Flavivirus (ZIKV and DENV) infection (OR, 6.35; 95% CI, 1.99-20.28; p = 0.001) was observed. Cases of GBS associated with ZIKV demonstrated a greater impairment of functional status and a higher percentage of mechanical ventilation. According to laboratory results, an association between ZIKV or ZIKV and DENV infection in patients with GBS was found. Cases of GBS associated with ZIKV exhibited a more severe clinical picture. Cases with co-infection were not found.

Ray fractions and carbohydrate dynamics of tree species along a 2750 m elevation gradient indicate climate response, not spatial storage limitation.

Parenchyma cells in the xylem store nonstructural carbohydrates (NSC), providing reserves of energy that fuel woody perennials through periods of stress and/or limitations to photosynthesis. If the capacity for storage is subject to selection, then the fraction of wood occupied by living parenchyma should increase towards stressful environments. Ray parenchyma fraction (RPF) and seasonal NSC dynamics were quantified for 12 conifers and three oaks along a transect spanning warm dry foothills (500 m above sea level) to cold wet treeline (3250 m asl) in California's central Sierra Nevada. Mean RPF was lower for both conifer and oak species with warmer dryer ranges. RPF variability increased with elevation or in relation to associated climatic variables in conifers - treeline-dominant Pinus albicaulis had the lowest mean RPF measured (c. 3.7%), but the highest environmentally standardized variability index. Conifer RPF variability was explained by environment, increasing predominantly towards cooler wetter range edges. In oaks, NSC was explained by environment - values increasing for evergreen and decreasing for deciduous oaks with elevation. Lastly, all species surveyed appear to prioritize filling available RPF with sugar to achieve molarities that balance reasonable tensions over starch to maximize stored carbon. RPF responds to environment but is unlikely to spatially constrain NSC storage.

Una introducción al enfoque del curso de vida y su uso en la investigación pediátrica: principales conceptos y principios metodológicos / An introduction to the life course approach and its use in pediatric research: main concepts and methodological principles

Resumen Desde su concepción, el enfoque del curso de vida se ha utilizado ampliamente en la investigación sociodemográfica y en los estudios sociológicos. El empleo de esta perspectiva se ha difundido desde hace algunos años en la investigación en salud. Sin embargo, su uso ha sido muy limitado en pediatría. Este trabajo presenta una exposición de los principales conceptos del enfoque del curso de vida y algunos principios metodológicos para el desarrollo de investigaciones desde esta perspectiva. Además, se incluyen una serie de proyectos de investigación que se han valido de este enfoque como fundamentación conceptual en su diseño e implementación y algunas fuentes de información que pueden ser utilizadas para el desarrollo de investigaciones desde esta conceptualización en México.

Abstract Since its inception, the life course approach has been widely used in the socio-demographic research and sociological studies. The use of this perspective in health research has spread for some years, although its use in pediatrics has been limited. This work presents the main concepts of the life course approach and some methodological principles for the development of research from this perspective. In addition, a series of research projects that have used this approach as a conceptual basis in their design and implementation are included, as well as some sources of information that can be used for the development of research since this conceptualization in Mexico.

An introduction to the life course approach and its use in pediatric research: main concepts and methodological principles.

Since its inception, the life course approach has been widely used in the socio-demographic research and sociological studies. The use of this perspective in health research has spread for some years, although its use in pediatrics has been limited. This work presents the main concepts of the life course approach and some methodological principles for the development of research from this perspective. In addition, a series of research projects that have used this approach as a conceptual basis in their design and implementation are included, as well as some sources of information that can be used for the development of research since this conceptualization in Mexico.

Desde su concepción, el enfoque del curso de vida se ha utilizado ampliamente en la investigación sociodemográfica y en los estudios sociológicos. El empleo de esta perspectiva se ha difundido desde hace algunos años en la investigación en salud. Sin embargo, su uso ha sido muy limitado en pediatría. Este trabajo presenta una exposición de los principales conceptos del enfoque del curso de vida y algunos principios metodológicos para el desarrollo de investigaciones desde esta perspectiva. Además, se incluyen una serie de proyectos de investigación que se han valido de este enfoque como fundamentación conceptual en su diseño e implementación y algunas fuentes de información que pueden ser utilizadas para el desarrollo de investigaciones desde esta conceptualización en México.

Diurnal Variation in Nonstructural Carbohydrate Storage in Trees: Remobilization and Vertical Mixing.

Nonstructural carbohydrate (NSC) storage plays a critical role in tree function and survival, but understanding and predicting local NSC storage dynamics is challenging because NSC storage pools are dispersed throughout the complex architecture of trees and continuously exchange carbon between source and sink organs at different time scales. To address these knowledge gaps, characterization and understanding of NSC diel variation are necessary. Here, we analyzed diurnal NSC dynamics in the overall architecture of almond (Prunus dulcis) trees. We also analyzed the allocation of newly assimilated carbon using isotopic labeling. We show that both components of NSC (i.e. soluble carbohydrates and starch) are highly dynamic at the diurnal time scale and that these trends are influenced by tissue type, age, and/or position within the canopy. In leaves, starch reserves can be depleted completely during the night, while woody tissue starch levels may vary by more than 50% over a daily cycle. Recently assimilated carbon showed a dispersed downward allocation across the entire tree. NSC diurnal fluctuations within the tree's structure in combination with dispersed carbon allocation patterns provide evidence for the presence of vertical mixing and suggest that the xylem acts as a secondary NSC redistribution pathway.

El horizonte de la atención médica en pediatría: ¿qué hacer en el caso de niños que se encuentran en situación de abandono, conflicto, daño o peligro, aunado a una enfermedad grave? / The horizon of medical attention in pediatrics: what to do in the case of children who are in abandonment, conflict, harm or danger situations in combination with a severe disease?

Resumen: Introducción: Las leyes refieren que los menores no tienen la capacidad para dar su consentimiento informado para su propia atención médica; sin embargo, hay condiciones especiales en las que se les permite determinar lo referente a su salud. Cuanto mayores sean las limitaciones de juicio y experiencia en los menores, menos peso se otorga a los valores y objetivos que expresan; cuanto más adversas sean las consecuencias, se deberá exigir un nivel más alto de autoridad para decidir en nombre del menor, dejando al Estado la capacidad de garantizar el bienestar del menor. Caso clínico: Niña de 12 años con diagnóstico de leucemia linfoblástica aguda LI, con antecedentes familiares y sociales precarios; evolución entorpecida por el desapego al tratamiento y sus condiciones insalubres y pobreza extrema. Ambos padres fallecieron al poco tiempo de iniciar su tratamiento, quedando ella al cuidado de su medio hermana mayor de edad. Se exponen la labor y el dilema ético del oncólogo tratante y del personal del Hospital Infantil de México Federico Gómez en la creación de redes de apoyo con el objetivo de priorizar el bienestar de la menor, sin dar lugar al quebrantamiento y la desintegración familiar, consiguiendo exitosamente su recuperación. Conclusiones: El caso fue sometido al Comité de Bioética Hospitalaria. Se formaron redes de apoyo interinstitucionales para intervenir en la dinámica familiar, resolviendo los requerimientos de la menor, y se consiguió con éxito superar la enfermedad.

Abstract: Background: Laws refer that minors do not have the capability to give informed consent for their own medical attention. However, there are special conditions in which they are allowed to decide about their health. The greater the judgement and experience limitations in minors, the less weight is given to the values and objectives they express. Also, the more adverse consequences might be, the higher the level of authority that is demanded to decide on behalf of the minor, thus granting the State the capability to guarantee the well-being of the minor. Case report: 12-year-old female patient with a diagnosis of acute lymphoblastic leukemia, with precarious social and family background; evolution of the disease obstructed by the disregard of the treatment due to her unsanitary and extreme poverty conditions. Both of her parents died soon after the start of the treatment and she was kept under the care of her half-sister of legal age. The work and the ethical dilemma of the pediatrician and the staff of Hospital Infantil de México Federico Gómez are exposed within the building of support networks with the objective of prioritizing the minor's well-being, without allowing family break-up or disintegration, thus succeeding in her recovery. Conclusions: The case was submitted to the Hospital Bioethics Committee. Inter-institutional support networks were built in order to improve dynamics of the family, thus solving the needs of the minor. Despite the misfortune of the situation, the disease was successfully overcome.