INFLUENCE OF DIETARY CALCIUM-PHOSPHORUS LEVELS ON CERTAIN MECHANICAL, PHYSICAL AND HISTOLOGICAL PROPERTIES AND CHEMICAL COMPOSITION OF BONES IN GILTS AND SECOND LITTER SOWS

1986 ◽  
Vol 66 (2) ◽  
pp. 495-503 ◽  
Author(s):  
R. R. GRANDHI ◽  
A. B. THORNTON-TRUMP ◽  
C. E. DOIGE
Keyword(s):  
Elastic Modulus ◽  
Testing Machine ◽  
National Research Council ◽  
Bending Moment ◽  
Dietary Calcium ◽  
National Academy Of Sciences ◽  
Metacarpal Bones ◽  
Calcium Phosphorus ◽  
The Right ◽  
Lactation Cycle

A 24 factorial design of treatments involving two breeds (Lacombe (L) and Yorkshire (Y)) and two dietary calcium-phosphorus (Ca-P) levels (100% or 150% of 1979 National Academy of Sciences-National Research Council recommended Ca-P levels) during finishing, gestation and lactation periods, was used to study the changes in certain mechanical, physical, chemical and histological characteristics of bones in gilts and second litter sows. Femur, 3rd metacarpal and 6th rib bones were collected from the right half of the 32 (16L + 16Y) gilts slaughtered at 159 ± 1 d of age and 46 (22L + 24Y) second litter sows slaughtered at the end of second gestation-lactation cycle. The mechanical properties, breaking force, bending moment, breaking stress and elastic modulus of femur and 3rd metacarpal bones, determined by flexture tests using an Instron Universal Testing Machine, were not significantly (P > 0.05) influenced by the dietary Ca-P levels in gilts or sows. Feeding 150% of NRC Ca-P levels during the finishing period increased (P < 0.05) the bone shaft diameter (23.2 ± 0.2 vs.22.3 ± 0.2 mm) in femurs and percent bone ash (60.5 ± 0.4 vs. 59.0 ± 0.4) and percent bone Ca (19.0 ± 0.5 vs. 17.0 ± 0.5) in 3rd metacarpals of gilts. The femurs and 3rd metacarpals of L gilts and sows had generally larger shaft diameters but lower bone strength, elastic modulus and bone cortex thickness than in Y pigs. The histological examination revealed no abnormalities in trabecular and cartilage structures of 6th ribs between sows fed different Ca-P levels. The results suggested that feeding 150% of NAS-NRC Ca-P levels during finishing, gestation and lactation periods produced some positive changes in bone characteristics of gilts and second litter sows with no identifiable changes in their ability to function. Certain bone characteristics were different between the two breeds and their response to dietary Ca-P levels varied between femur and 3rd metacarpals of gilts and sows. Key words: Calcium, phosphorus, bone characteristics, gilts, sows

Contribution of Palmar Radiocarpal and Ulnocarpal Ligaments to the Stability of the Canine Antebrachiocarpal Joint

2019 ◽  
Vol 32 (04) ◽  
pp. 305-313
Author(s):  
Joshua Milgram ◽  
Jonathan Stockman ◽  
Gilad Segev ◽  
Yaron Meiner ◽  
Anna Shipov
Keyword(s):  
Clinical Relevance ◽  
Motion Tracking ◽  
Testing Machine ◽  
Joint Position ◽  
Joint Stability ◽  
Custom Made ◽  
Metacarpal Bones ◽  
The Stability ◽  
Musculoskeletal Pathology ◽  
The Right

Objective The aim of this study was to evaluate the contribution of the palmar radiocarpal ligament and the palmar ulnocarpal ligament to canine antebrachiocarpal joint stability. Materials and Methods The right carpus of four dog cadavers, free of musculoskeletal pathology, was stripped of muscle. Each specimen was placed into a custom-made joint testing machine and tested at 15° extension, and 0° and 15° flexion. A single motion tracking sensor was fixed to the metacarpal bones. All specimens were tested with all ligaments intact and after transection of the palmar radiocarpal and ulnocarpal ligaments. A range of weights between 0.2 and 2.0 kg was used to test the carpi in three directions (axial, medial/lateral and cranial/caudal) and two moments (pronation/supination and valgus/varus). Results No differences were found between the translations and rotations of the manus relative to the radius and ulna with the ligaments intact and the ligaments transected at any of the carpal angles tested, except at 15° of flexion. Increasing the angle of flexion resulted in a significant increase in cranial and caudal translation of the manus relative to the radius and ulna both in the intact and transected specimens. Clinical relevance Antebrachiocarpal joint position plays a more important role in craniocaudal antebrachiocarpal joint stability than the palmar radiocarpal and ulnocarpal ligaments.

scholarly journals Dietary Calcium-Phosphorus Ratios for Growing Pigs in Relation to Serum Levels and Bone Development

1971 ◽  
Vol 12 (2) ◽  
pp. 202-219 ◽  
Author(s):  
N.C. Nielsen ◽  
S. Andersen ◽  
A. Madsen ◽  
H.P. Mortensen
Keyword(s):  
Bone Development ◽  
Serum Levels ◽  
Dietary Calcium ◽  
Growing Pigs ◽  
Calcium Phosphorus

Gestational and lactational feeding strategies for gilts: Growth, carcass characteristics and meat quality of the progeny

2003 ◽  
Vol 83 (2) ◽  
pp. 205-211 ◽  
Author(s):  
A. Fortin ◽  
E. J. Clowes ◽  
A. L. Schaefer
Keyword(s):  
Meat Quality ◽  
National Research Council ◽  
Carcass Characteristics ◽  
Residual Effect ◽  
Feeding Strategies ◽  
Pork Quality ◽  
National Academy Of Sciences ◽  
Weaning Weight ◽  
Body Protein ◽  
Academy Of Sciences

This study was conducted to determine whether feeding gilts (1) at or above their National Academy of Sciences-National Research Council (NAS-NRC 1998) requirements during gestation, and (2) to lose a moderate (~10%) or large (~17%) amount of maternal protein during lactation had a residual effect on their progeny’s growth, carcass characteristics and pork quality at market weight. From each litter, the heaviest and lightest barrows and gilts were selected. The progeny of gilts fed above their requirements during gestation, and those that lost the least body protein during lactation were heavier at weaning; +0.3 kg (P < 0.05) and +0.5 kg (P = 0.01), respectively. However, these liveweight differences, which were associated with the gestation and lactation effects, were no longer evident (P > 0.05) at day 35 or 85 post-weaning. But at slaughter, these animals had thinner (P < 0.01) fat thickness and higher (P < 0.05) predicted salable meat yield. Independently of the gestation and lactation treatments, and compared to the low-weaning-weight pigs, the high- weaning-weight pigs maintained their weight advantage (P < 0.01 at day 35 (+ 2.8 kg) and day 85 (+ 5.4 kg) post-weaning), took 4.5 fewer days (P < 0.01) to reach market weight, but had similar (P > 0.05) carcass characteristics and pork quality. Key words: Gilts, gestational and lactational protein, litter, growth, carcass characteristics and meat quality

scholarly journals Evaluating science communication

2018 ◽  
Vol 116 (16) ◽  
pp. 7670-7675 ◽  
Author(s):  
Baruch Fischhoff
Keyword(s):  
Voter Turnout ◽  
Research Agenda ◽  
Science Communication ◽  
Systems Approach ◽  
National Research Council ◽  
Decision Makers ◽  
Vaccination Rates ◽  
Communication Processes ◽  
Effective Science ◽  
The Right

Effective science communication requires assembling scientists with knowledge relevant to decision makers, translating that knowledge into useful terms, establishing trusted two-way communication channels, evaluating the process, and refining it as needed. Communicating Science Effectively: A Research Agenda [National Research Council (2017)] surveys the scientific foundations for accomplishing these tasks, the research agenda for improving them, and the essential collaborative relations with decision makers and communication professionals. Recognizing the complexity of the science, the decisions, and the communication processes, the report calls for a systems approach. This perspective offers an approach to creating such systems by adapting scientific methods to the practical constraints of science communication. It considers staffing (are the right people involved?), internal collaboration (are they talking to one another?), and external collaboration (are they talking to other stakeholders?). It focuses on contexts where the goal of science communication is helping people to make autonomous choices rather than promoting specific behaviors (e.g., voter turnout, vaccination rates, energy consumption). The approach is illustrated with research in two domains: decisions about preventing sexual assault and responding to pandemic disease.

scholarly journals The NAS-NRC Twin Registry and Duke Twins Study of Memory in Aging: An Update

2019 ◽  
Vol 22 (6) ◽  
pp. 757-760 ◽  
Author(s):  
Margaret Gatz ◽  
Brenda L. Plassman ◽  
Caroline M. Tanner ◽  
Samuel M. Goldman ◽  
Gary E. Swan ◽  
...  
Keyword(s):  
World War Ii ◽  
Human Genetics ◽  
White Male ◽  
National Research Council ◽  
Armed Forces ◽  
National Archive ◽  
Population Based ◽  
National Academy Of Sciences ◽  
Twin Registry ◽  
Academy Of Sciences

AbstractThe National Academy of Sciences-National Research Council (NAS-NRC) Twin Registry is one of the oldest, national population-based twin registries in the USA. It comprises 15,924 White male twin pairs born in the years 1917–1927 (N = 31.848), both of whom served in the armed forces, chiefly during World War II. This article updates activities in this registry since the most recent report in Twin Research and Human Genetics (Page, 2006). Records-based data include information from enlistment charts and Veterans Administration data linkages. There have been three major epidemiologic questionnaires and an education and earnings survey. Separate data collection efforts with the NAS-NRC registry include the National Heart, Lung, and Blood Institute (NHLBI) subsample, the Duke Twins Study of Memory in Aging and a clinically based study of Parkinson’s disease. Progress has been made on consolidating the various data holdings of the NAS-NRC Twin Registry. Data that had been available through the National Academy of Sciences are now freely available through National Archive of Computerized Data on Aging (NACDA).

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