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Cardiovascular disease (CVD) is the leading cause of death worldwide (WHO, 2017). In addition to the global and national morbidity and mortality burdens of the disease, it imposes a substantial economic burden on society. The American heart association predicts that by 2035, 45% of Americans will suffer from CVD with costs expected to reach $1.1 trillion annually. Clinical trials have demonstrated that a nut-containing diet low in saturated fat and cholesterol, while high in poly and monounsaturated fatty acids has a beneficial effect on plasma lipids and lipoproteins when compared with either a low fat or average American diet. Other bioactive compounds present in walnuts, including micronutrients, fiber, and phytochemicals, may also contribute to their cardio protective effect by reducing inflammation, improving vascular reactivity, and lowering oxidative stress. It has been demonstrated that the consumption of walnuts resulted in significant reduction in body mass index (BMI), percentage of body fat, increased lean body mass and an increased amount of water in the body. A large population cohort study also demonstrated a marked reduction in body weight and other anthropometric parameters in people on regular consumption of walnuts.
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Background: Concurrent chemoradiation is one of the major treatments for locally advanced rectal cancer. As radiation therapy suppresses the bone marrow, it is essential to quantify the dose received by the pelvic bone marrow (PBM), which constitutes about 50% of the hematopoietic bone marrow. Methods: A prospective study conducted in 50 patients with locally advanced rectal cancer treated with long course concurrent chemoradiation. All the patients were followed up with weekly complete blood count for assessing hematological toxicities and were graded. PBM was contoured and subdivided into ilium bone marrow (IBM), lower pelvis bone marrow (LPBM) and lumbosacral bone marrow (LSBM). Volumes of bone marrow receiving different doses were quantified. Results: Among the 50 patients, 40 (80%) developed acute bone marrow toxicity, during the course of treatment. Highest grade of bone marrow toxicity developed in 20 (40%) patients which was grade 2. Compared to grade 1, grade 2 neutropenia patients exhibited significantly higher levels of V10 to V40 (p<0.05) in PBM and significantly higher levels of V20 in IBM and LSBM. In LPBM, compared to grade 1 leukopenia and neutropenia, grade 2 leukopenia and neutropenia exhibited significantly higher levels of V10 and V20 (p<0.05). Conclusions: Increased PBM V10 to V40, IBM V20, LSBM V20, LPBM V10 and V20 were significantly related to the higher grades of neutropenia in locally advanced rectal cancer patients undergoing long course concurrent chemoradiation. Increased LPBM V10 and V20 were also significantly related with higher grades of leukopenia.
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Rheumatoid arthritis (RA) is a chronic, symmetrical, inflammatory autoimmune disease that affects small joints. RA has a population prevalence of 0.5% to 1% in the U.S. The annual cost of care for chronic treatment of RA in the United States is estimated at $12,509. Pharmaceutical companies have developed drugs to treat RA using Janus kinase (JAK) inhibitors. These drugs can have potential adverse effects. Forecasting a better output to JAK inhibitors (JAKI’s). Therapy duration of JAKI’s and Problems regarding to strategies of dose reduction or if the discontinuation of therapy takes place in case of low disease activity. The accurate pharmacological profile and interactions of other drugs with JAKI’s have to establish. Proper safety, efficacy profile of JAKI’s and when administered in combination with DMARD’s. The safety, efficacy data of JAKI’s when compared to non-anti-TNF biologics. Obtaining of experience on JAKI’s that were already existed in the market and further experimental findings on newer compounds and which may clarify many of the aspects which are to be solved in nearer future as these JAKI will have greater application in treatment of RA. Regardless of significant developments in latest years in the pharmacotherapy of RA in the use of JAK inhibitors, yet the adverse effects of JAK inhibitors are unanswered. Therefore, one of the main concerns associated with JAK inhibitor is the potential adverse effects. The challenges can be addressed by clinical pharmacist mediated interventions related to dosing of JAK inhibitors and proper management of adverse drug reactions (ADRs).
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Background: The use of psychoactive substances is prevalent worldwide, including among healthcare workers whose well-being, productivity, and effectiveness in addressing substance addiction in patients and the wider community can be significantly impacted. However, the extent of substance misuse among healthcare professionals in Nigeria, with its substantial social and public health implications, remains poorly understood. This research focused on the prevalence, attitudes, substances used, and influencing factors regarding substance misuse among staff at Nnamdi Azikiwe university teaching hospital (NAUTH) in Nnewi. Methods: A descriptive cross-sectional study was conducted involving 194 healthcare workers, using a multi-stage sampling method. Data were collected via a semi-structured self-administered questionnaire and analyzed with SPSS version 20. Results were presented in tables, considering p values less than 0.05 as significant. Results: Of the 197 respondents, 63.5% were female and 36.5% male, spanning various professions including doctors, nurses, and other healthcare specialists. Notably, 66% of participants had used substances in their lifetime. Alcohol was the most commonly abused substance, with significant percentages of moderate and high-risk users. Socialization and peer pressure were identified as the predominant factors influencing substance use, with significant statistical associations found between substance use and variables such as profession, sex, and duration of practice. Conclusions: The study highlighted a considerable prevalence of alcohol use among healthcare workers, who generally held a moderate view towards substance misuse and identified socialization and peer pressure as key factors. These findings underscore the pressing need for targeted training and intervention strategies for substance addiction among healthcare workers in Nigeria.
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Background: Breast cancer (BC) is a major global health concern, especially in developing regions like Nigeria. This study addresses the knowledge gap, screening practices, and associated factors related to BC among women of reproductive age in Akodo town, Lagos, Nigeria. It is crucial to explore this aspect of women's health as early detection through screening is vital in reducing mortality rates associated with BC. Methods: A cross-sectional descriptive survey design was adopted for this study using women of reproductive age living in Akodo town. A total of 320 respondents was recruited through multistage sampling technique. SPSS was used for data analysis. Results: Most respondents (232, 80%) were aware of BC, of which only 122, (52.6%) knew about at least one screening method. About half, 125 (53.9%) had good knowledge of BC. Only 25% had good screening practice of BC, with 47 (84.5%) having done self-breast examination (SBE) only, 2 (3.4%) had had clinical breast examination (CBE) only, 6 (10.3%) had done both SBE and CBE, while only one (1.7%) had ever had a mammogram. Knowledge of screening methods as well as age below 40 years [OR=2.76; 95% CI (1.00-7.58), OR=2.97; 95% CI (1.09-8.11)] were associated with good screening practices. Conclusions: Though awareness about BC has significantly increased, screening practices is still very low. Hence, knowledge about the various screening practices needs to be scaled up, and probably incentives should probably be given to those who go for screening.
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Non-steroidal anti-inflammatory drugs (NSAIDS) are used in a wide range but may cause harm to the gastrointestinal mucosa, which leads to various complications. This study shows the impact of long term NSAID use on small and large intestine and presents 2 cases of patients with NSAID induced perforations. The first case involves a 62-year-old male patient with RA on long term Ibuprofen use, presented with abdominal pain, vomiting, and lower limbs pain. Laparotomy revealed a 5 mm perforation in the proximal jejunum. The second case, a male patient of 65 years of age using diclofenac without a prescription, which lead to a 4×4 cm sigmoid colon perforation. The comparison of both the cases presents a difference in examination and laboratory findings. Long-term NSAID use has been associated with various GI complications, including perforations. The case presents the importance of considering NSAID related complications, mainly in older patients and the persons with ulcers. Combining NSAIDS with other drugs, like misoprostol may minimize the risk of the GI complications. NSAIDs are also linked with cardiovascular events, and heart related issues. This study shows the need of careful NSAID prescription, with their association with preventable adverse effects. 30% of hospitalizations for adverse drug reactions are only by the NSAIDs. PPIs and H2 receptor antagonist are commonly used to protect the gastrointestinal mucosa which minimizes the occurrence of ulcers. Healthcare professionals should be careful particularly in case of high risk patients to minimize the NSAID related complications.
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The COVID-19 pandemic, caused by SARS-COV-2, has led to significant mortality worldwide. Despite the declaration in May, 2023 by the World Health Organization (WHO), that the COVID-19 pandemic in no longer a public health emergency of international concern, some survivors are experiencing post-infection complications, including esophageal achalasia. Esophageal achalasia is a rare neurodegenerative disorder characterized by impaired esophageal motility and lower esophageal sphincter dysfunction. This study reviews the literature to explore the association between COVID-19 and achalasia and also presents a case of a 9-month-old child diagnosed with achalasia following COVID-19 infection; a unique occurrence in a young child. This study comprises a case report and a literature review. Clinical data for the case report was collected from medical records, while the literature review included a search of electronic databases from January 2020 to October 2023. Keywords related to COVID-19 and esophageal achalasia were utilized to conduct a search in electronic databases resulting in 9 selected articles. This study underscores the emerging concern of esophageal achalasia as a post-infection complication of COVID-19. It provides a unique case of a young child developing achalasia after COVID-19 infection and reviews the limited literature on this association. Further research is needed to understand the underlying mechanisms and potential preventative measures for this rare complication in COVID-19 survivors.
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Background: The provision of adequate nutrition is of the utmost importance for the promotion of optimal growth and development in the early stages of human life as well as the stimulation of immune system function to combat infections. Therefore, this study aimed to assess the level of consumption and the factors affecting the provision of fruits and vegetables to children in Bayelsa state of Nigeria. Methods: This was a population-based survey conducted among 360 parents/caregivers of children aged 5 years and below randomly selected from Bayelsa state, Nigeria. The data for this study was collected with in-person interviews utilizing a standardized questionnaire. The results were presented in frequency and percentage. The level of significance was determined using a confidence interval of 95% and p<0.05. Results: Most of the respondents 355 (98.6%) were female with the age range 25-44 making 86.65% of the total population. Findings show that 40.8% of respondents gave their children fruits and vegetables only once a week while 3.6% gave their children fruits and vegetables 4 times and above a week. The majority of respondents 240 (66.7%) indicated that the high cost of fruits and vegetables was the main factor that affected consumption of fruits and vegetables. Conclusions: The findings demonstrated a low consumption level of fruits and vegetables among the children in Bayelsa state. Therefore, health professionals should be obliged to educate parents and caregivers of children on adequate provision of fruits and vegetables for their children.
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Abstract Bone regeneration is crucial for repairing bone tissue following various injuries. Research techniques that enable the study of metabolic changes in bone tissue under different conditions are important for understanding bone repair and remodeling. This study used bone scintigraphy to evaluate osteogenesis secondary to osteotomy in a preclinical model of New Zealand rabbits. For this purpose, we conducted a longitudinal, prospective, case-control study in which scintigraphic variables were measured in both the right forearm (case-operated) and the left forearm (control - non-operated). The study sample consisted of 10 rabbits subjected to osteotomy, followed by a 12-week postoperative evaluation period, divided into six imaging stages at 1, 2, 3, 4, 8, and 12 weeks. We observed that the operated forearm showed significantly higher external radiation than the control side, using the pinhole collimator, denoting an increase in the biodistribution and tropism of the radiopharmaceutical to the operated forearm. Among the three evaluated time points, osteoblastic activity was highest in the second week and presented a significant decline in the 8th and 12th weeks, denoting regeneration and resolution of the surgical injury; the control forearm was also influenced by the inactivity imposed by the operated forearm. This fact was notably evidenced by the reduction in the metabolic activity of osteoblasts in the left forearm. Our study suggested that bone scintigraphy was sensitive enough to semi-quantitatively differentiate the metabolic activity of osteoblasts in the operated forearm in the three temporal landmarks evaluated in the study.
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The treatment of arterial hypertension (AH) contributes to the reduction of morbidity and mortality. Gender differences are likely to play a role, as non-treatment is associated with clinical and sociodemographic aspects. The aim of this study was to investigate the factors associated with non-treatment of AH and gender differences in hypertensive individuals from the ELSA-Brasil cohort. The study was conducted with 5,743 baseline hypertensive cohort participants. AH was considered if there was a previous diagnosis or if systolic blood pressure (SBP) was ≥140 and/or diastolic BP (DBP) was ≥90 mmHg. Sociodemographic and anthropometric data, lifestyle, comorbidities, and use of antihypertensive medications were evaluated through interviews and in-person measurements. Treatment with renin-angiotensin-aldosterone system inhibitors (RAASi) or other antihypertensive medications and non-treatment were evaluated with multivariate logistic regression. Non-treatment was observed in 32.8% of hypertensive individuals. Of the 67.7% treated individuals, 41.1% received RAASi. Non-treatment was associated with alcohol consumption in women (OR=1.41; 95%CI: 1.15-1.73; P=0.001), lowest schooling level in men (OR=1.70; 95%CI: 1.32-2.19; P<0.001), and younger age groups in men and women (strongest association in males aged 35-44 years: OR=4.58, 95%CI: 3.17-6.6, P<0.001). Among those using RAASi, a higher proportion of white, older individuals, and with more comorbidities was observed. The high percentage of non-treatment, even in this civil servant population, indicated the need to improve the treatment cascade for AH. Public health policies should consider giving special attention to gender roles in groups at higher risk of non-treatment to reduce inequities related to AH in Brazil.
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Patients undergoing chemotherapy with cisplatin commonly present gastrointestinal effects such as constipation and gastric emptying (GE) delay. Both the purinergic system and physical exercise modulate the gastrointestinal (GI) tract. In the current study, we investigated the role of ATP, physical exercise, and P2X7 receptor blocking on GE delay induced by cisplatin in rats. Male rats were divided into the following groups: control (C), cisplatin (Cis), exercise (Ex), Brilliant Blue G (BBG), ATP, Cis+Ex, Cis+ATP, Cis+BBG, Cis+Ex+BBG, Cis+Ex+BBG+ATP, and Cis+ATP+BBG. GE delay was induced by treatment with 1 mg/kg cisplatin (1 time/week for 5 weeks, ip). The moderate physical exercise was swimming (1 h/day, 5 days/week for 5 weeks). At the end of the treatment or exercise and 30 min before the GE assessment, some groups received BBG (50 mg/kg, sc) or ATP (2 mg/kg, sc). Then, GE was assessed after a 10-min postprandial period. Chronic use of Cis decreased GE delay (P<0.05) compared to the control group. Both exercise and ATP prevented (P<0.05) GE delay compared to Cis. The pretreatment with BBG significantly inhibited (P<0.05) the effect of exercise and ATP. On the other hand, the association between exercise and ATP reversed (P<0.05) the effect of the BBG and prevented GE delay. Therefore, we suggest that both exercise and treatment with ATP activate P2X7 receptors and prevent GE delay induced by cisplatin in rats.
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@#Staphylococcus aureus is a common bacterial pathogen known to cause various kinds of infections due to its repertoire of virulence factors. This study aimed to investigate the distribution of 19 types of virulence genes among clinical isolates of methicillin-susceptible S. aureus (MSSA) using the polymerase chain reaction. A total of 109 MSSA isolates, i.e., 63 hospital-associated (HA) and 46 community-associated (CA) were collected from Hospital Sultanah Nur Zahirah, the main tertiary hospital in Terengganu, Malaysia, from July 2016 to June 2017. The most frequent virulence genes detected were hla (78.9%, n=86) and hld (78.0%, n=85) encoding hemolysins, lukED (56.9%, n=62) encoding leukotoxin ED, followed by seb (26.6%, n=29) and sea (24.8%, n=27) encoding enterotoxins. Among 34 (31.2%) isolates carrying six or more virulence genes, only five were multidrug resistant (MDR) while the remaining isolates were susceptible. Significant associations were discovered between the hld gene with CA-MSSA (p=0.016) and the seo gene with HA-MSSA (p=0.023). However, there is no significant association between virulence genes among the different types of infection. The clinical MSSA isolates in Terengganu showed high prevalence and high diversity of virulence gene carriage.
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Introduction.Les formes majeures dedrépanocytose sont une source de perturbation des paramètres lipidiques. Cette perturbation est impliquée dans l'apparition de nombreuses maladies cardiovasculaires telles que les accidents vasculaires cérébraux. Cette étude avait pour but d'établir la relation entre les formes majeures de la drépanocytaire, le risque athérogène et l'état inflammatoire des sujets. Méthodologie. Il s'agit d'une étude transversale à visé analytique qui s'est déroulée dans les services d'hématologie du CHU de Cocody et dans le laboratoire de biochimie de l'UFR des Sciences Médicales d'Abidjan portant sur les sujets drépanocytaires majeurs et de sujets apparemment sains admis au CHU de Cocody pendant la période de l'étude. Résultats.Nous avons recrutéun total de 57 sujets drépanocytaires (SS, SC, Sß0,Sß+) et 44 sujets apparemment sains sur la base d'une électrophorèse de l'hémoglobine.L'âge moyen des sujets drépanocytaires était de 17,77 ans avec des extrêmes de 2 et 67 ans. On notait une prédominance féminine avec un sex-ratio de 1,48.Les cholestérolémies totales moyennes des drépanocytaires SS et SC étaient plus faibles comparativement à celles des drépanocytaires Sß0, Sß+et de la population témoin avec une différence statistiquement significative (p= 0,0031).Les triglycéridémies moyennes des drépanocytaires (SS et SC) étaient plus basses en comparaison à celles des témoins et des drépanocytaires Sß0et Sß+. Les valeurs moyennes de l'indice d'athérogénicité des sujets drépanocytaires étaient élevées que chez les témoins avec une différence statistiquement significative(p = 0,001). les drépanocytaires avaient des concentrations de CRP significativement plus élevée avec p = 0, 0015.Conclusion.Chez les sujets drépanocytaires, les valeurs augmentées de l'indice d'athérogénicité, des triglycérides, de la CRP et la baisse de la concentration du cholestérol HDL expliqueraient un risque athérogène plus élevé. Il est importantd'introduire le bilan lipidique dans le suivi du patient drépanocytaire
Introduction.The major forms of sickle cell disease are a source of disruption to lipid parameters. This disruption is implicated in the development of many cardiovascular diseases such as strokes. The aim of this study was to establish the relationship between the major forms of sickle cell disease, atherogenic risk, and the inflammatory state of subjects. Methodology.This was a cross-sectional analytical study conducted in the hematology departments of the Cocody University Hospital and the biochemistry laboratory of the Faculty of Medical Sciences in Abidjan, focusing on major sickle cell subjects and apparently healthy subjects admitted to the Cocody University Hospital during the study period. Results.A total of 57 sickle cell subjects (SS, SC, Sß0, Sß+) and 44 apparently healthy subjects were recruited based on hemoglobin electrophoresis. The average age of sickle cell subjects was 17.77 years with a range of 2 to 67 years. There was a female predominance with a sex ratio of 1.48. The mean total cholesterol levels of SS and SC sickle cell subjects were lower compared to those of Sß0, Sß+ sickle cell subjects and the control population with a statistically significant difference (p=0.0031). The mean triglyceride levels of sickle cell subjects (SS and SC) were lower compared to controls and Sß0 and Sß+ sickle cell subjects. The mean atherogenicity index valuesof sickle cell subjects were higher than in controls with a statistically significant difference (p=0.001). Sickle cell subjects had significantly higher CRP concentrations with p=0.0015. Conclusion.In sickle cell subjects, increased values of the atherogenicity index, triglycerides, CRP, and decreased HDL cholesterol levels would explain a higher atherogenic risk. It is important to include lipid profile assessment in the treatmentent of sickle cell disease
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Abstract In order to better understand the ossification processes in anurans our study was carried out on tadpoles and adults of Lithobates catesbeianus. In this sense, we characterized the kinetic properties of alkaline phosphatase with p-nitrophenylphosphatase (pNPP) and pyrophosphate (PPi) and evaluated the activities of tartrate-resistant acid phosphatase and acid phosphatase. The enzyme extracts were obtained from tadpoles and adult femurs, which were divided into epiphysis and diaphysis. After homogenization, the samples were submitted to differential centrifugation to obtain cell membranes and, further, to phospholipase C (PIPLC) treatment, to remove membrane-bound proteins anchored by phosphatidylinositol. The average of specific activity for pNPP hydrolysis (at pH 10.5) by alkaline phosphatase released by phosphatidylinositol-specific phospholipase C (PIPLC) from Bacillus cereus among different bone regions at different animal ages was 1,142.57 U.mg-1, while for PPi hydrolysis (at pH 8.0), it was 1,433.82 U.mg-1. Among the compounds tested for enzymatic activity, the one that influenced the most was EDTA, with approximately 67% of inhibition for pNPPase activity and 77% for PPase activity. In the case of kinetic parameters, the enzyme showed a Michaelian behavior for pNPP and PPi hydrolysis. The Km value was around 0.6mM for pNPPase activity and ranged from 0.01 to 0.11mM for PPase activity, indicating that the enzyme has a higher affinity for this substrate. The study of pNPP and PPi hydrolysis by the enzyme revealed that the optimum pH of actuation for pNPP was 10.5, while for PPi, which is considered the true substrate of alkaline phosphatase, was 8.0, close to the physiological value. The results show that regardless of the ossification type that occurs, the same enzyme or isoenzymes act on the different bone regions and different life stages of anurans. The similarity of the results of studies with other vertebrates shows that anurans can be considered excellent animal models for the study of biological calcification.
Resumo Para melhor compreender o processo de ossificação em anuros, nosso estudo foi conduzido em girinos e adultos de Lithobates catesbeianus. Nesse sentido, as propriedades cinéticas da fosfatase alcalina com p-nitrofenilfosfato (pNPP) e pirofosfato (PPi) foram caracterizadas, e as atividades enzimáticas das fosfatases ácida e ácida tartarato resistente foram avaliadas. Os extratos enzimáticos foram obtidos de fêmur de girinos e adultos, divididos em epífise e diáfise. Após a homogeneização as amostras foram submetidas à centrifugação diferencial para obter membrana celular e, em seguida, ao tratamento com fosfolipase C (PIPLC), para remover as proteínas de membrana ancoradas por fosfatidilinositol. A média da atividade específica da fosfatase alcalina, liberada pela PIPLC de Bacillus cereus, para a hidrólise de pNPP (pH 10,5) nas diferentes regiões do fêmur e idades dos animais foi de 1.142,57 U.mg-1, enquanto para a hidrólise do PPi (pH 8,0) foi de 1.433,82 U.mg-1. Entre os compostos testados para a atividade enzimática, o de maior influência foi o EDTA, inibindo aproximadamente 67% e 77% das atividades de pNPPase e PPase, respectivamente. Quanto aos parâmetros cinéticos, a enzima apresentou comportamento Michaeliano para a hidrólise dos dois substratos. O valor de Km foi de 0,6 mM para a atividade de pNPPase e variou de 0,01 a 0,11 para a atividade de PPase, indicando uma maior afinidade por esse substrato. O estudo da hidrólise de pNPP e PPi revelou que o pH ótimo aparente de atuação foi de 10,5 para o pNPP e 8,0 para o PPi, próximo ao fisiológico, sendo que esse é considerado o substrato natural da fosfatase alcalina. Os resultados demonstram que, apesar do tipo de ossificação que ocorre, a mesma enzima ou isoenzimas, atuam nos diferentes locais do osso e estágios de vida dos anuros. A similaridade dos estudos com os realizados com outros vertebrados apontam que os anuros podem ser considerados excelentes modelos animais para o estudo da calcificação biológica.
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Abstract Melon production in the Brazilian semi-arid region is subject to the use of marginal waters with high salinity. However, the use of regulators and bioactivators in seed treatment can mitigate the harmful effects of salts in irrigation water. In this context, the objective was to evaluate the effect of pre-germination treatments with plant regulators and bioactivator in melon seeds for the production of seedlings irrigated with biosaline water from fish farming effluent. For this, two trials with the Goldex and Grand Prix hybrids were carried out separately. A completely randomized design was used in a 4 × 3 factorial scheme (pre-germination treatments × water dilutions). In addition to the control, the seeds were treated with salicylic and gibberellic acids and thiamethoxam. The waters used for irrigation were local-supply water, fish farming effluent (biosaline water) and these diluted to 50%. Physiological and biochemical analyses were performed for fourteen days. Biosaline water (5.0 dS m-1) did not affect the emergence of Goldex melon seedlings, but compromised the establishment of the Grand Prix cultivar. Seed pre-treatments with salicylic and gibberellic acids attenuate the effects of water salinity and promote growth modulations, resulting in more vigorous melon seedlings.
Resumo A produção de meloeiro no semiárido brasileiro está sujeita a utilização de águas marginais com salinidade elevada. Entretanto, a utilização de reguladores e bioativadores no tratamento de sementes podem mitigar os efeitos nocivos dos sais na água de irrigação. Nesse sentido, objetivou-se avaliar o efeito de tratamentos pré-germinativos com fitorreguladores e bioativador em sementes de melão para a produção de mudas irrigadas com água biossalina de efluente de piscicultura. Para isso, dois ensaios com os híbridos Goldex e Grand Prix foram realizados separadamente. Utilizou-se delineamento inteiramente casualizado em esquema fatorial 4 × 3 (tratamentos pré-germinativos × diluições de água). Além do controle, as sementes foram tratadas com os ácidos salicílico e giberélico, e tiametoxam. As águas utilizadas para irrigação foram a de abastecimento local, efluente de piscicultura (água biossalina) e estas diluídas a 50%. Durante quatorze dias foram realizadas as análises fisiológicas e bioquímicas. A água biossalina (5,0 dS m-1) não afetou a emergência de plântulas de meloeiro Goldex, mas prejudicou o estabelecimento da cultivar Grand Prix. Os pré-tratamentos de sementes com os ácidos salicílico e giberélico atenuam os efeitos da salinidade da água e promovem modulações no crescimento, proporcionando mudas de meloeiro mais vigorosas.
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Abstract The demand for products to replace high-cost raw materials, such oil and fish meal, in the manufacture of feed for use in aquaculture, while also guaranteeing the nutritional quality of the diets, is increasing. Silage produced with fish and vegetables residues is a low-cost and efficient protein source. The objective of the present study was to evaluate the physiological and biochemical responses of tambaqui fingerlings fed four different levels of silage included in commercial feed with 28% crude protein, over two periods: 45 and 90 days. Each treatment was carried out over three replications, with 10 tambaqui in each 100 L experimental tank. At the end of each established period, blood samples were collected from five animals from each repetition to determine the hematological and biochemical variables. Body weight and total length, hepatosomatic and liposomal indices and hematocrit of specimens fed with diets supplemented with silage did not exhibit significant changes in both assessment period. After 45 days of feeding, the hemoglobin concentration increased when tambaqui were fed a diet including 20% silage. The red blood cell count, mean corpuscular volume and mean corpuscular hemoglobin did not change between treatments in either period. The total protein concentrations increased significantly in the plasma of tambaqui fed with diets with the inclusion of 5 and 10% of silage, evaluated after feeding for 45 days. It was found that the groups which had silage included in their diet did not exhibit significant alterations in the evaluated parameters, and the diet was therefore not consider harmful to the health of tambaqui. Therefore, the use of silage as a feed supplement during tambaqui farming is a sustainable alternative for producers, as it leads to a reduction of impacts of fish and vegetables waste disposal.
Resumo A procura por insumos que substituam produtos de alto custo, como óleo e farinha de peixe, na fabricação de rações para uso na aquicultura é crescente, sendo necessário garantir a qualidade nutricional das dietas. A silagem produzida a partir de resíduos de pescado e de vegetais apresenta-se como uma alternativa de baixo custo e eficiente fonte proteica. O objetivo do presente estudo foi avaliar as respostas fisiológicas e bioquímicas de alevinos de tambaqui alimentados com quatro níveis de inclusão de silagem em ração comercial com 28% de proteína bruta, em dois períodos: 45 e 90 dias. Cada tratamento foi realizado em três repetições, com 10 tambaquis em cada caixa experimental de 100 L. Ao término de cada período estabelecido, amostras sanguíneas foram coletadas de cinco animais de cada repetição para determinação das variáveis hematológicas e bioquímicas. Peso, comprimento total e índices hepatossomático e lipossomático de espécimes alimentados com silagem não mostraram alterações significativas em ambos os períodos de avaliação, bem como os valores de hematócrito. A concentração de hemoglobina de tambaqui após 45 dias de alimentação aumentou quando foi fornecida dieta com inclusão de 20% de silagem. A contagem de eritrócitos, volume corpuscular médio e hemoglobina corpuscular média não apresentaram alterações entre os tratamentos, em ambos os períodos. As proteínas totais aumentaram significativamente no plasma de tambaquis que receberam dietas com inclusão de 5 e 10% de silagem, avaliados após 45 dias de alimentação. Evidenciou-se que os grupos com inclusão de silagem na dieta não apresentaram alterações significativas nos parâmetros avaliados, assim não sendo prejudiciais à higidez do tambaqui. Portanto, o uso da silagem como suplemento alimentar durante o cultivo do tambaqui é uma alternativa sustentável para produtores, por promover a redução do descarte de resíduos de pescado e da agricultura.
ABSTRACT
Abstract Food loss due to contamination caused by fungi has much impact on agriculture and leads to significant economic losses. Synthetic and natural fungicides have been used for avoiding losses of several food products due to fungal contamination. As a result, species of the genus Capsicum have been used for preserving food because of their chemical compounds with antifungal activity. Therefore, this study aimed at identifying some phenolic compounds found in both ethyl acetate extract (EAE) and methanolic extract (ME) from habanero pepper (C. chinense) ripe fruit by liquid chromatography tandem mass spectrometry with electrospray ionization (LC-ESI-MS/MS) and at evaluating their antifungal activities against fungi Sclerotinia sclerotiorum, Rhizopus stolonifer and Colletotrichum gloeosporioides. Extracts resulted from a sequential process of maceration. Antifungal activity was evaluated by the disk diffusion method (DDM) at the following doses of both diluted extracts: 25 µL, 50 µL, 100 µL and 200 µL. The chemical analysis showed that there were protocatechuic acid, gentisic acid, vanillic acid, kaempferol-3-O-robinobiosideo and naringenin in both extracts. EAE showed high inhibition of mycelial growth at both doses 100µL and 200µL against the three fungi while methanolic exhibited weak activity even at the highest dose under investigation. However, further in-depth studies are needed to reinforce their uses and practical applications to the agricultural field.
Resumo As perdas de alimentos por contaminação causada por fungos são de grande impacto negativo para a agricultura, gerando altos prejuízos econômicos. Para evitar as perdas de diversos produtos alimentícios pela contaminação fúngica são utilizados fungicidas sintéticos e naturais. As espécies do gênero Capsicum são usadas há muitos anos para auxiliar na conservação de alimentos por possuírem substâncias químicas com ação antifúngica entre outras. Neste contexto, o objetivo deste estudo foi identificar alguns compostos fenólicos por cromatografia líquida de alta eficiência acoplada à espectrometria de massas sequencial (LC-ESI-MS/MS) presentes nos extratos acetato de etila (EAE) e metanólico (ME) dos frutos maduros da pimenta biquinho (C. chinense) e avaliar atividade antifúngica de EAE e ME contra os fungos Sclerotinia sclerotiorum, Rhizopus stolonifer e Colletotrichum gloeosporioides. Os extratos foram obtidos de forma sequencial, utilizando o procedimento de maceração. A atividade antifúngica foi avaliada seguindo a metodologia de difusão em disco, nas doses de 25 µL, 50 µL, 100 µL e 200 µL de cada extrato diluído. A análise química evidenciou a presença de ácido protocatequico, ácido gentisico, ácido vanílico, kaempferol-3-O-robinobiosídeo e naringenina em ambos os extratos. EAE revelou maior poder de inibição do crescimento micelial nas doses de 100µL e 200µL contra os três fungos testados, enquanto ME exibiu fraca atividade inclusive na maior dose investigada. Entretanto, estudos mais aprofundados ainda são necessários para consolidar seu uso e aplicação prática na área agronômica.
ABSTRACT
Abstract In this study, we evaluated variation in vegetative and reproductive phenological events of four phylogenetically related plant species subjected to a seasonal environment. To this aim, we sampled 15 individuals of each plant species every fortnight for one year, between January and December of 2017. To assess when a given phenophase occurred more intensely in the population, the Fournier intensity index was used and the synchrony of individuals of the sample in a given phenological event was estimated using the activity index. The Rayleigh (Z) test was used to determine whether the phenological events have seasonal distribution. The relationship of abiotic factors (photoperiod, precipitation, relative humidity and temperature) with the intensity of phenophases was evaluated for each plant species using generalized linear models (GLMs). The phenophases of all plants showed a seasonal distribution pattern, as well as variation in synchrony of phenophases and specific sets of abiotic factors significantly influenced their phenophases. New leaves, for example, were produced throughout the seasons, with intense leaf fall in the dry season. Flowering periods, on the other hand, did not overlap. Indeed, species exhibited sequential flowering and asynchronous flowering among individuals. Our results suggest that the phenological patterns of four sympatric plant species are directly linked to climatic variables, but different abiotic factors affected different phenophases.
Resumo Neste estudo, avaliamos a variação nos eventos fenológicos vegetativos e reprodutivos de quatro espécies de plantas filogeneticamente relacionadas submetidas a um ambiente sazonal. Para isso, amostramos 15 indivíduos de cada espécie quinzenalmente, pelo período de um ano, entre janeiro e dezembro de 2017. Para avaliar quando uma determinada fenofase ocorreu de modo mais intenso na população foi utilizado o índice de intensidade de Fournier e a sincronia dos indivíduos da amostra em determinado evento fenológico foi estimada utilizando-se o índice de atividade. O teste de Rayleigh (Z) foi usado para determinar se os eventos fenológicos têm distribuição sazonal. A relação dos fatores abióticos (fotoperíodo, precipitação, temperatura e umidade relativa) com a intensidade das fenofases foi avaliada para cada espécie de planta usando modelos lineares generalizados (GLMs). As fenofases de todas as plantas apresentaram um padrão de distribuição sazonal, bem como variação na sincronia das fenofases e conjuntos específicos de fatores abióticos influenciaram significativamente suas fenofases. Folhas novas, por exemplo, foram produzidas ao longo das estações, com intensa queda de folhas na estação seca. Os períodos de floração, por outro lado, não se sobrepuseram. De fato, as espécies exibiram floração sequencial e floração assíncrona entre os indivíduos. Nossos resultados sugerem que os padrões fenológicos das quatro espécies de plantas simpátricas estão diretamente ligados às variáveis climáticas, mas diferentes fatores abióticos afetaram diferentes fenofases.