Chemical evidence of the quantitative thiamine and riboflavin requirements of the rat during pregnancy and the development of the fetus

Two techniques have been investigated to determine more accurately the quantitative riboflavin needs of the rat during reproduction. One procedure, that of determining the deposition of riboflavin in the developing fetal and placental tissues at several intervals during pregnancy, has revealed a very rapid increase in the requirement for this factor during the last four days of pregnancy. Prior to this time, and in fact for the majority of the reproductive cycle, the full-grown rat appeared to have little need for riboflavin above that of the non-pregnant adult;The development of the placental tissue influenced the total need for riboflavin to a negligible extent;Metabolism studies conducted on pregnant and non-pregnant stock females maintained on a ration providing approximately 100 mcg. of riboflavin per day indicated that the diet provided a large surplus during the early portion of pregnancy and supplied some excess oven during the final days of gestation, as judged by the excretion of the vitamin by the kidneys. Females receiving this ration produced large litters of active young with satisfactory birth weights. The young were well stocked with riboflavin and there was no depletion of the maternal tissues during pregnancy;It was observed that stock females 92 days old were still accumulating body stores of riboflavin; those animals have a higher dietary need for riboflavin during reproduction than do older animals;Thiamine and riboflavin assays of the developing fetal tissues and those of the female rat during pregnancy indicated that the need for riboflavin was lose than that for thiamine. This quantitative relationship between the two vitamins Is particularly interesting in view of the present recommended allowances for the two vitamins during pregnancy in women;In the formulation of rations satisfactory for reproduction in rats, it appears that a daily intake of 100 mcg. of riboflavin is desirable during the last third of pregnancy when the demand for this vitamin reaches a maximum. This intake provides a considerable surplus during earlier phase of the pregnancy period;Thiamine requirements exceed those for riboflavin during pregnancy in the rat, although this relationship does not follow during maintenance of the adult female. The date from present study suggest that a daily intake of 125 mcg. thiamine is ample for reproduction during the period of maximum need. This amount supplies a large excess of the vitamin in the first half of the gestation period

The Romeo and Juliet Project: Teaching Shakespeare to English Language Learners

The No Child Left Behind Act says that schools must assess students at all grade levels and change their standards, and help those who may be at a lower level because every student is entitled to an education. By creating a unit plan teaching Shakespeare\u27s Romeo and Juliet, specifically making modifications for English Language Learners, Native English speakers will also learn and be challenged. Using theatre games and reading scripts to build vocabulary of the ELLs, mainstream students will also learn about the culture of ELLs to better integrate them into the school system. Theatre not only helps the students to elevate their vocabulary but also helped them to be more comfortable around the students in their classes because they all had to be included together all the time. This unit plan can be used in English classes which will further merge students because not all students take theatre classes but English class is usually required

The effect of various methods of extraction on the composition of fruit juice

Thesis (M.A.)--University of Kansas, Home Economics, 1930

The influence of maternal psychosocial characteristics on infant feeding styles

Maternal feeding styles in infancy and early childhood are associated with children’s later risk for overweight and obesity. Maternal psychosocial factors that influence feeding styles during the complementary feeding period, the time during which infants transition from a milk-based diet to one that includes solid foods and other non-milk products, have received less attention. The present study explores how maternal psychosocial factors—specifically self-esteem, parenting self-efficacy, parenting satisfaction, and depression symptoms—influence mothers’ infant feeding styles at nine months of age, a time during which solid foods eating habits are being established. Participants included 160 low-income, African-American mother-infant pairs in central North Carolina who were enrolled in the Infant Care and Risk of Obesity Study. Regression models tested for associations between maternal psychosocial characteristics and pressuring and restrictive feeding styles. Models were first adjusted for maternal age, education, marital status and obesity status. To account for infant characteristics, models were then adjusted for infant weight-for-length, distress to limitations and activity level scores. Maternal self-esteem was negatively associated with pressuring to soothe. Maternal parenting self-efficacy was positively associated with restriction-diet quality. Maternal parenting satisfaction and depression symptoms were not associated with feeding styles in the final models. Focusing on strengthening maternal self-esteem and parenting self-efficacy may help to prevent the development of less desirable infant feeding styles

Policies on doctors’ declaration of interests in medical organisations : a thematic analysis

ObjectivesThere has been growing concern about doctors? conflicts of interests (COIs) but it is unclear what processes and tools exist to enable the consistent declaration and management of such interests. This study mapped existing policies across a variety of organisations and settings to better understand the degree of variation and identify opportunities for improvement.DesignThematic analysis.Setting and ParticipantsWe studied the COI policies of 31 UK and international organisations which set or influence professional standards or engage doctors in healthcare commissioning and provision settings.Main outcome measures:Organisational policy similarities and differences.ResultsMost policies (29/31) referred to the need for individuals to apply judgement when deciding whether an interest is a conflict, with just over half (18/31) advocating a low threshold. Policies differed on the perception of frequency of COI, the timings of declarations, the type of interests that needed to be declared, and how COI and policy breaches should be managed. Just 14/31 policies stated a duty to report concerns in relation to COI. Only 18/31 policies advised COI would be published, while three stated that any disclosures would remain confidential.ConclusionsThe analysis of organisational policies revealed wide variation in what interests should be declared, when and how. This variation suggests that the current system may not be adequate to maintain a high level of professional integrity in all settings and that there is a need for better standardisation that reduces the risk of errors while addressing the needs of doctors, organisations and the public.Publisher PDFPeer reviewe

Otolaryngologic manifestations of klippel-feil syndrome in children

IMPORTANCE: Children with Klippel-Feil syndrome (KFS), characterized principally by abnormal fusion of 2 or more cervical vertebrae, may have many additional congenital anomalies. The overall prevalence of otolaryngologic manifestations among patients with KFS has not been previously characterized. OBJECTIVE: To define the otolaryngologic diagnoses made and procedures performed in95 patients with KFS, which, to our knowledge, is the largest series of this challenging patient population published to date. DESIGN, SETTING, AND PARTICIPANTS: For this retrospective review, all patients with KFS who underwent otolaryngology consultation at our institution over a 26-year period (January 1989 to December 2015) were included. Patients were identified using International Classification of Diseases, Ninth Revision (ICD-9) codes and were confirmed through individual medical record review. Relevant otolaryngologic diagnoses and procedures were extracted using ICD-9 and Current Procedural Terminology codes, respectively. Selected demographics included age, sex, number of clinic visits, and number of procedures. MAINOUTCOMES ANDMEASURES: The primary outcomes were the otolaryngologic diagnoses and procedures associated with the KFS patient population; the secondary outcome was Cormack-Lehane classification documented during airway procedures. RESULTS: Overall, 95 patients with KFS were included in this study (55 males [58%] and 40 females [42%]); mean (range) age at time of presentation to the otorhinolaryngology clinic was 5.8 (birth-23.0) years. Each patient with KFS averaged 8 visits to the otorhinolaryngology office and 5 otolaryngologic diagnoses. The most common diagnosis was conductive hearing loss (n = 49 [52%]), followed by sensorineural hearing loss (n = 38 [40%]), and dysphagia (n = 37 [39%]). Sixty-two (65%) patients underwent otolaryngologic procedures, with 44 (46%) undergoing multiple procedures. The most common procedure was tympanostomy tube placement (n = 36 [38%]), followed by office flexible endoscopy (n = 23 [24%]). Twelve of the20 patients who underwent direct laryngoscopy had documented Cormack-Lehane classification; 5 of 12 patients (42%) had a compromised view (grade 2, 3, or 4) of the larynx. Three patients required tracheotomies at this institution for airway stabilization purposes; each had severe upper airway obstruction leading to respiratory failure. CONCLUSIONS AND RELEVANCE: Patients with KFS require consultation for a variety of otolaryngologic conditions. Among these, hearing loss is the most common, but airway issues related to cervical spine fusion are the most challenging. Formulating an appropriate care plan in advance is paramount, even for routine otolaryngology procedures

Biomimetic microfluidics

Through developments in 3D fabrication technologies in recent years, we can now build and characterize much more sophisticated 3D platforms than was previously possible. We can create regions of differing polarity and hydrophobicity, mix passive and binding behaviours, and regions of differing flexibility/rigidity, hardness/softness. In addition, we can integrate materials that can switch between these characteristics, enabling the creation of biomimetic microfluidic building blocks that exhibit switchable characteristics such as programmed microvehicle movement (chemotaxis), switchable binding and release, switchable soft polymer actuation (e.g. valving), and detection. These building blocks can be in turn integrated into microfluidic systems with hitherto unsurpassed functionalities that can contribute to bridging the gap between what is required for many applications, and what we can currently deliver [1]. The emerging transition from existing engineering-inspired 2D to bioinspired 3D fluidic concepts represents a major turning point in the evolution of microfluidics. Implementation of these disruptive concepts may open the way to realise biochemical sensing systems with performance characteristics far beyond those of current devices. A key development will be the integration of biomimetic functions like self-awareness/self-diagnosis of condition and self-repair capabilities to extend their useful lifetime [2]. In this contribution, I will present ideas and demonstrations of practical ways to begin building a biomimetic function toolbox that could form the basis of futuristic microfluidic systems. Examples will include chemotactic microvehicles that can collaborate to perform sophisticated functions at specific locations [3] and precision control of flow behaviour in channels using light [4]. Strategies for creating high resolution (sub-200 nm) 3D soft-polymer responsive structures will be discussed. References [1] F. Benito-Lopez, R. Byrne, A.M. Răduţă, N.E. Vrana, G. McGuinness, D. Diamond, Ionogel-based light-actuated valves for controlling liquid flow in micro-fluidic manifolds, Lab Chip. 10 (2010) 195–201. doi:10.1039/B914709H. [2] L. Florea, K. Wagner, P. Wagner, G.G. Wallace, F. Benito-Lopez, D.L. Officer, D. Diamond, Photo-Chemopropulsion - Light-Stimulated Movement of Microdroplets, Advanced Materials. 26 (2014) 7339–7345. doi:10.1002/adma.201403007. [3] W. Francis, C. Fay, L. Florea, D. Diamond, Self-propelled chemotactic ionic liquid droplets, Chem. Commun. 51 (2015) 2342–2344. doi:10.1039/C4CC09214G. [4] C. Delaney, P. McCluskey, S. Coleman, J. Whyte, N. Kent, D. Diamond, Precision control of flow rate in microfluidic channels using photoresponsive soft polymer actuators, Lab Chip. 17 (2017) 2013–2021. doi:10.1039/C7LC00368D