Books on the topic 'Nutrition of calves'

Running a Small Beef Herd provides an introduction to beef production for those about to enter the industry and is an ongoing reference for anyone managing a small herd of beef cattle on their property. Fundamental considerations such as the economics of beef production, the selection of a suitable beef enterprise to match a particular property and level of experience are covered. It considers various systems suitable for a small beef operation: steer fattening, cow and calf systems, foster calves and multiple suckling, and lot feeding. Running a Small Beef Herd offers practical advice on buying cattle, marketing methods for particular types of cattle and specifications for markets. Cattle handling, necessary husbandry practices such as castration and vaccination, herd health, reproductive management, nutrition and carrying capacity are also explored. This updated edition expands on the systems of beef production, breeds, breed management, supplementary feeding, drought management, ear tagging requirements and soil health and fertility.

Insects need to ingest nutrients at appropriate levels to attain a balanced diet and maximize fitness. They do so by integrated responses that involve physiological mechanisms for sensing current nutritional needs, releasing systemic signals, and producing specific appetites for key required nutrients. Historically, the study of insect feeding behavior was appreciated for its importance in the understanding and control of crop pests and disease vectors. However, current evidence has shown that some mechanisms regulating feeding are highly conserved in animals, from insects to humans, bringing additional interest in insects as models in medicine. The study of insect feeding behavior and nutrition has also given rise to an integrative modelling approach called the geometric framework for nutrition. This approach has proven useful beyond the insects, and allows the understanding of the impact of multiple nutrients on individuals and their interactions in populations, communities, and ecosystems.

Because of its essential role in human life, food has been a part of historical narratives since antiquity. As the proper subject of professional inquiry, however, food gained recognition only in the 1990s with the advent of the so-called new cultural history. Whereas the disciplinary hegemony of culture has begun to fragment and decline, the field of food history continues to grow significantly. Therefore, it is only fitting to reflect on the historical study of food as a cultural expression, to differentiate it from cultural approaches to the history of food politics, nutrition, and the like. Changing scholarly assumptions about culture have had an impact in terms of understanding what cuisine is all about. Drawing on the theories of Jack Goody, Sidney Mintz, and Priscilla Parkhurst Ferguson about cuisine, this article examines historical change at three interrelated levels: the circulation of texts, the tastes of dining, and the practices of cooking.

Jejunoileal bypass (JIB) was a malabsorptive bariatric procedure developed in the 1950s based on pioneering work in canine models. All described variants involved anastomosis between the proximal jejunum and terminal ileum. Long-term weight loss and improvement in hyperlipidemia were found to be particularly impressive. However, it became clear by the 1980s that morbidity and mortality associated with JIB were unacceptably high. The procedure was abandoned, and many patients underwent reversal to normal intestinal continuity, or revision to other bariatric procedures. Two main mechanisms underlie the complications with JIB. Malabsorption caused excessive diarrhea, nutritional and metabolic failure, and hyperoxaluria, leading to urolithiasis. Bacterial overgrowth in the defunctioned small intestine was thought to lead to immune complex-mediated development of inflammatory arthritis, and the so-called bypass enteritis syndrome. A combination of these two mechanisms was thought to be responsible for hepatic dysfunction and failure after JIB.

Cystic fibrosis lung disease is characterized by chronic infection, inflammation and a progressive loss of lung function. Patients are also affected by recurrent episodes of increased respiratory symptoms, called exacerbations which have a detrimental effect on quality of life, the rate of lung function decline, and mortality. Early diagnosis and treatment is vital. Diagnosis relies on a combination of symptoms, examination findings, the results of laboratory tests, and lung function. Antibiotics are the mainstay of treatment but airway clearance, nutrition, and glucose homeostasis must also be optimized. Mild exacerbations are usually treated with oral antibiotics and more severe exacerbations with intravenous antibiotics. The choice of antibiotic is guided by the patient’s chronic pulmonary infections, the in-vitro antibiotic sensitivities, known antibiotic allergies, and the previous response to treatment. In patients with chronic Pseudomonas aeruginosa infection, antibiotic monotherapy is thought to increase the risk of resistance and treatment with 2 antibiotics is therefore suggested (usually a β‎-lactam and an aminoglycoside). Although there is a lack of evidence on the duration of treatment, most patients receive around 14 days. This can be altered according to the time taken for symptoms and lung function to return to pre-exacerbation levels. If patients are carefully selected and receive appropriate monitoring, home intravenous antibiotics can be as effective as in-patient treatment. They are also associated with decreased disruption to patients / family life, decreased risk of cross infection and decreased costs.

Millions of people attempt to lose weight every year, but most will not succeed. Simply learning about a new diet and exercise plan is not enough. This book presents 25 detailed sessions of an empirically supported, cognitive-behavioral treatment package called acceptance-based behavioral treatment (ABT) that has now been utilized successfully in five large National Institute of Health–sponsored clinical trials. The foundation of this approach is comprised of the nutritional, physical activity, and behavioral components of the most successful, gold-standard behavioral weight loss packages, such as Look Ahead and the Diabetes Prevention Project. These components are synthesized with acceptance, willingness, behavioral commitment, motivation, and relapse prevention strategies drawn from Acceptance and Commitment Therapy, Dialectical Behavior Therapy and Relapse Prevention Therapy. ABT is premised on the idea that specialized self-control skills are necessary for weight control, given our innate desire to consume delicious foods and to conserve energy. These self-control skills revolve around a willingness to choose behaviors that may be perceived as uncomfortable for the sake of a more valuable objective. The treatment focuses on both weight loss and weight loss maintenance and aims to confer lifelong skills that facilitate long-term weight control. The companion Client Workbook contains summaries of session content, worksheets, handouts, and assignments.

Millions of people attempt to lose weight every year, but most will not succeed. Simply learning about a new diet and exercise plan is not enough. This book presents 25 detailed sessions of an empirically supported, cognitive-behavioral treatment package called acceptance-based behavioral treatment (ABT) that has now been utilized successfully in five large National Institute of Health–sponsored clinical trials. The foundation of this approach is comprised of the nutritional, physical activity, and behavioral components of the most successful, gold-standard behavioral weight loss packages, such as Look Ahead and the Diabetes Prevention Project. These components are synthesized with acceptance, willingness, behavioral commitment, motivation, and relapse prevention strategies drawn from acceptance and commitment therapy, dialectical behavior therapy and relapse prevention therapy. ABT is premised on the idea that specialized self-control skills are necessary for weight control, given our innate desire to consume delicious foods and to conserve energy. These self-control skills revolve around a willingness to choose behaviors that may be perceived as uncomfortable for the sake of a more valuable objective. The treatment focuses on both weight loss and weight loss maintenance and aims to confer lifelong skills that facilitate long-term weight control. This companion Client Workbook contains summaries of session content, worksheets, handouts, and assignments.

Bones are multifunctional passive organs of movement that supports soft tissue and directly attached muscles. They also protect internal organs and are a reserve of calcium, phosphorus and magnesium. Each bone is covered with periosteum, and the adjacent bone surfaces are covered by articular cartilage. Histologically, the bone is an organ composed of many different tissues. The main component is bone tissue (cortical and spongy) composed of a set of bone cells and intercellular substance (mineral and organic), it also contains fat, hematopoietic (bone marrow) and cartilaginous tissue. Bones are a tissue that even in adult life retains the ability to change shape and structure depending on changes in their mechanical and hormonal environment, as well as self-renewal and repair capabilities. This process is called bone turnover. The basic processes of bone turnover are: • bone modeling (incessantly changes in bone shape during individual growth) following resorption and tissue formation at various locations (e.g. bone marrow formation) to increase mass and skeletal morphology. This process occurs in the bones of growing individuals and stops after reaching puberty • bone remodeling (processes involve in maintaining bone tissue by resorbing and replacing old bone tissue with new tissue in the same place, e.g. repairing micro fractures). It is a process involving the removal and internal remodeling of existing bone and is responsible for maintaining tissue mass and architecture of mature bones. Bone turnover is regulated by two types of transformation: • osteoclastogenesis, i.e. formation of cells responsible for bone resorption • osteoblastogenesis, i.e. formation of cells responsible for bone formation (bone matrix synthesis and mineralization) Bone maturity can be defined as the completion of basic structural development and mineralization leading to maximum mass and optimal mechanical strength. The highest rate of increase in pig bone mass is observed in the first twelve weeks after birth. This period of growth is considered crucial for optimizing the growth of the skeleton of pigs, because the degree of bone mineralization in later life stages (adulthood) depends largely on the amount of bone minerals accumulated in the early stages of their growth. The development of the technique allows to determine the condition of the skeletal system (or individual bones) in living animals by methods used in human medicine, or after their slaughter. For in vivo determination of bone properties, Abstract 10 double energy X-ray absorptiometry or computed tomography scanning techniques are used. Both methods allow the quantification of mineral content and bone mineral density. The most important property from a practical point of view is the bone’s bending strength, which is directly determined by the maximum bending force. The most important factors affecting bone strength are: • age (growth period), • gender and the associated hormonal balance, • genotype and modification of genes responsible for bone growth • chemical composition of the body (protein and fat content, and the proportion between these components), • physical activity and related bone load, • nutritional factors: – protein intake influencing synthesis of organic matrix of bone, – content of minerals in the feed (CA, P, Zn, Ca/P, Mg, Mn, Na, Cl, K, Cu ratio) influencing synthesis of the inorganic matrix of bone, – mineral/protein ratio in the diet (Ca/protein, P/protein, Zn/protein) – feed energy concentration, – energy source (content of saturated fatty acids - SFA, content of polyun saturated fatty acids - PUFA, in particular ALA, EPA, DPA, DHA), – feed additives, in particular: enzymes (e.g. phytase releasing of minerals bounded in phytin complexes), probiotics and prebiotics (e.g. inulin improving the function of the digestive tract by increasing absorption of nutrients), – vitamin content that regulate metabolism and biochemical changes occurring in bone tissue (e.g. vitamin D3, B6, C and K). This study was based on the results of research experiments from available literature, and studies on growing pigs carried out at the Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences. The tests were performed in total on 300 pigs of Duroc, Pietrain, Puławska breeds, line 990 and hybrids (Great White × Duroc, Great White × Landrace), PIC pigs, slaughtered at different body weight during the growth period from 15 to 130 kg. Bones for biomechanical tests were collected after slaughter from each pig. Their length, mass and volume were determined. Based on these measurements, the specific weight (density, g/cm3) was calculated. Then each bone was cut in the middle of the shaft and the outer and inner diameters were measured both horizontally and vertically. Based on these measurements, the following indicators were calculated: • cortical thickness, • cortical surface, • cortical index. Abstract 11 Bone strength was tested by a three-point bending test. The obtained data enabled the determination of: • bending force (the magnitude of the maximum force at which disintegration and disruption of bone structure occurs), • strength (the amount of maximum force needed to break/crack of bone), • stiffness (quotient of the force acting on the bone and the amount of displacement occurring under the influence of this force). Investigation of changes in physical and biomechanical features of bones during growth was performed on pigs of the synthetic 990 line growing from 15 to 130 kg body weight. The animals were slaughtered successively at a body weight of 15, 30, 40, 50, 70, 90, 110 and 130 kg. After slaughter, the following bones were separated from the right half-carcass: humerus, 3rd and 4th metatarsal bone, femur, tibia and fibula as well as 3rd and 4th metatarsal bone. The features of bones were determined using methods described in the methodology. Describing bone growth with the Gompertz equation, it was found that the earliest slowdown of bone growth curve was observed for metacarpal and metatarsal bones. This means that these bones matured the most quickly. The established data also indicate that the rib is the slowest maturing bone. The femur, humerus, tibia and fibula were between the values of these features for the metatarsal, metacarpal and rib bones. The rate of increase in bone mass and length differed significantly between the examined bones, but in all cases it was lower (coefficient b <1) than the growth rate of the whole body of the animal. The fastest growth rate was estimated for the rib mass (coefficient b = 0.93). Among the long bones, the humerus (coefficient b = 0.81) was characterized by the fastest rate of weight gain, however femur the smallest (coefficient b = 0.71). The lowest rate of bone mass increase was observed in the foot bones, with the metacarpal bones having a slightly higher value of coefficient b than the metatarsal bones (0.67 vs 0.62). The third bone had a lower growth rate than the fourth bone, regardless of whether they were metatarsal or metacarpal. The value of the bending force increased as the animals grew. Regardless of the growth point tested, the highest values were observed for the humerus, tibia and femur, smaller for the metatarsal and metacarpal bone, and the lowest for the fibula and rib. The rate of change in the value of this indicator increased at a similar rate as the body weight changes of the animals in the case of the fibula and the fourth metacarpal bone (b value = 0.98), and more slowly in the case of the metatarsal bone, the third metacarpal bone, and the tibia bone (values of the b ratio 0.81–0.85), and the slowest femur, humerus and rib (value of b = 0.60–0.66). Bone stiffness increased as animals grew. Regardless of the growth point tested, the highest values were observed for the humerus, tibia and femur, smaller for the metatarsal and metacarpal bone, and the lowest for the fibula and rib. Abstract 12 The rate of change in the value of this indicator changed at a faster rate than the increase in weight of pigs in the case of metacarpal and metatarsal bones (coefficient b = 1.01–1.22), slightly slower in the case of fibula (coefficient b = 0.92), definitely slower in the case of the tibia (b = 0.73), ribs (b = 0.66), femur (b = 0.59) and humerus (b = 0.50). Bone strength increased as animals grew. Regardless of the growth point tested, bone strength was as follows femur > tibia > humerus > 4 metacarpal> 3 metacarpal> 3 metatarsal > 4 metatarsal > rib> fibula. The rate of increase in strength of all examined bones was greater than the rate of weight gain of pigs (value of the coefficient b = 2.04–3.26). As the animals grew, the bone density increased. However, the growth rate of this indicator for the majority of bones was slower than the rate of weight gain (the value of the coefficient b ranged from 0.37 – humerus to 0.84 – fibula). The exception was the rib, whose density increased at a similar pace increasing the body weight of animals (value of the coefficient b = 0.97). The study on the influence of the breed and the feeding intensity on bone characteristics (physical and biomechanical) was performed on pigs of the breeds Duroc, Pietrain, and synthetic 990 during a growth period of 15 to 70 kg body weight. Animals were fed ad libitum or dosed system. After slaughter at a body weight of 70 kg, three bones were taken from the right half-carcass: femur, three metatarsal, and three metacarpal and subjected to the determinations described in the methodology. The weight of bones of animals fed aa libitum was significantly lower than in pigs fed restrictively All bones of Duroc breed were significantly heavier and longer than Pietrain and 990 pig bones. The average values of bending force for the examined bones took the following order: III metatarsal bone (63.5 kg) <III metacarpal bone (77.9 kg) <femur (271.5 kg). The feeding system and breed of pigs had no significant effect on the value of this indicator. The average values of the bones strength took the following order: III metatarsal bone (92.6 kg) <III metacarpal (107.2 kg) <femur (353.1 kg). Feeding intensity and breed of animals had no significant effect on the value of this feature of the bones tested. The average bone density took the following order: femur (1.23 g/cm3) <III metatarsal bone (1.26 g/cm3) <III metacarpal bone (1.34 g / cm3). The density of bones of animals fed aa libitum was higher (P<0.01) than in animals fed with a dosing system. The density of examined bones within the breeds took the following order: Pietrain race> line 990> Duroc race. The differences between the “extreme” breeds were: 7.2% (III metatarsal bone), 8.3% (III metacarpal bone), 8.4% (femur). Abstract 13 The average bone stiffness took the following order: III metatarsal bone (35.1 kg/mm) <III metacarpus (41.5 kg/mm) <femur (60.5 kg/mm). This indicator did not differ between the groups of pigs fed at different intensity, except for the metacarpal bone, which was more stiffer in pigs fed aa libitum (P<0.05). The femur of animals fed ad libitum showed a tendency (P<0.09) to be more stiffer and a force of 4.5 kg required for its displacement by 1 mm. Breed differences in stiffness were found for the femur (P <0.05) and III metacarpal bone (P <0.05). For femur, the highest value of this indicator was found in Pietrain pigs (64.5 kg/mm), lower in pigs of 990 line (61.6 kg/mm) and the lowest in Duroc pigs (55.3 kg/mm). In turn, the 3rd metacarpal bone of Duroc and Pietrain pigs had similar stiffness (39.0 and 40.0 kg/mm respectively) and was smaller than that of line 990 pigs (45.4 kg/mm). The thickness of the cortical bone layer took the following order: III metatarsal bone (2.25 mm) <III metacarpal bone (2.41 mm) <femur (5.12 mm). The feeding system did not affect this indicator. Breed differences (P <0.05) for this trait were found only for the femur bone: Duroc (5.42 mm)> line 990 (5.13 mm)> Pietrain (4.81 mm). The cross sectional area of the examined bones was arranged in the following order: III metatarsal bone (84 mm2) <III metacarpal bone (90 mm2) <femur (286 mm2). The feeding system had no effect on the value of this bone trait, with the exception of the femur, which in animals fed the dosing system was 4.7% higher (P<0.05) than in pigs fed ad libitum. Breed differences (P<0.01) in the coross sectional area were found only in femur and III metatarsal bone. The value of this indicator was the highest in Duroc pigs, lower in 990 animals and the lowest in Pietrain pigs. The cortical index of individual bones was in the following order: III metatarsal bone (31.86) <III metacarpal bone (33.86) <femur (44.75). However, its value did not significantly depend on the intensity of feeding or the breed of pigs.