A5036694588- Ruminant Nutrition and Digestive Physiology
- Genetic and phenotypic traits in livestock
- Reproductive Physiology in Livestock
- Maritime and Coastal Archaeology
- Effects of Environmental Stressors on Livestock
- Animal Nutrition and Physiology
- Education Systems and Policy
- Rangeland Management and Livestock Ecology
- Pacific and Southeast Asian Studies
- Fiscal Policy and Economic Growth
- Control Systems in Engineering
- Regional Economic and Spatial Analysis
- Aerospace Engineering and Control Systems
- Nitrogen and Sulfur Effects on Brassica
- Rocket and propulsion systems research
- Sensorless Control of Electric Motors
- Agroforestry and silvopastoral systems
- Advanced Aircraft Design and Technologies
- Space exploration and regulation
- Agriculture and Rural Development Research
- Regional Development and Policy
- Agriculture, Soil, Plant Science
- Aerospace Engineering and Energy Systems
- Rabbits: Nutrition, Reproduction, Health
- Analytical Chemistry and Chromatography
Glenn Research Center
2014-2023
University of Lincoln
2012-2023
Purdue University West Lafayette
2001-2019
Marshall Space Flight Center
2016
University of Michigan
2013
Colorado State University
1998-2012
Chevron (United States)
2011
University of Reading
1969-2009
MRV Communications (United States)
2008
Optica
2008
SUMMARY Eighty Friesian heifers were used to study the effect on milk production of two fixed levels intake at stages lactation. The rations estimated contain 7·9 and 6·2 kg starch equivalent per day, with adequate protein content. allocated random these for weeks 1·9 lactation re-allocated them 10–18 Apart from minor variation all fed alike remainder higher level feeding increased yields solids solids-not-fat content in each period but had a smaller mid- than early lactation, trend which...
Conclusions concerning trends in natural resource scarcity may depend critically on the choice of index. Unfortunately, prevalence vertical integration industries has hindered use some otherwise desirable measures. In this paper duality theory is used to derive an econometric procedure for estimating one such measure, shadow price situ. Empirical results Canadian metal mining industry indicate that as measured by decreased substantially over time.
Journal Article A Test of the Theory Exhaustible Resources Get access Robert Halvorsen, Halvorsen University Washington Search for other works by this author on: Oxford Academic Google Scholar Tim R. Smith Federal Reserve Bank Kansas City The Quarterly Economics, Volume 106, Issue 1, February 1991, Pages 123–140, https://doi.org/10.2307/2937909 Published: 01 1991
SUMMARY Food utilization by lactating dairy cows was studied in a randomized experiment covering the first 24 weeks of lactation, with further observations on performance over remainder lactation under farm conditions. Over 3-year period 90 firstcalf each took part for one making six groups 14–16 animals. For experimental fixed basal diet given hay, concentrates, and wet brewer's grains. One group received only ration. Four addition concentrates supplement 4, 8, 12, 16 from calving onwards...
While full automation of road vehicles remains a future goal, shared-control and semiautonomous driving-involving transitions control between the human machine-are more feasible objectives in near term. These alternative driving modes will benefit from new research toward novel steering devices, suitably where machine intelligence only partially controls vehicle. In this article, it is proposed that when shares vehicle with an autonomous or system, force control, nondisplacement wheel (i.e.,...
UV light has become increasingly well-established as an effective primary disinfectant for Giardia and Cryptosporidium. Many utilities are now focusing attention on control of emerging contaminants, looking at the effectiveness advanced oxidation part a multiple-barrier treatment train improving water quality. In research small number full-scale applications, process (AOP) been shown to be purification train. For City Aurora, Colorado, Aurora Reservoir Water Purification Facility will...
A bstract -The effects of resource depletion on economic growth depend critically the elasticities substitution between non-renewable natural resources and reproducible inputs. Estimation for has been hindered by absence data their prices, which results from prevalence vertical integration in industries. In this paper we use theory restricted cost functions to develop a general procedure estimating possibilities unpriced model with Canadian metal mining industry indicates that resource,...
SUMMARY Fishmeal, soya-bean meal and urea were compared as nitrogen sources in diets rich fibre for yearling cattle, using feeding trials digestibility retention studies. All animals individually fed. Diets supplemented with fishmeal supported the highest rates of daily live-weight gain retention. There was no response dry-matter intake from extra nitrogen, either or urea, when crude protein diet 8·5% over, a small used. Molar proportions VFA, rumen NH 3 -N concentrations blood all affected...
Childhood malnutrition and growth faltering is a serious concern in Nepal. Studies of child typically focus on mother characteristics as key factors, largely because Demographic Health Surveys (DHS) collect data at these levels. To control for measure the importance higher-level factors this study supplements 2006 2011 DHS Nepal with from coincident rounds Living Standards (NLSS). NLSS information summarized district level matched to children using identifiers available DHS. The sample...
1. Sixteen Friesian cows were used in Expt 1 to measure the effect of substituting urea-N with fishmeal-N either early lactation (Part 1) or mid-lactation 2). 2. In Part (days 15–84 lactation) major N constituent concentrate was urea (U), urea-N: ratio 2:1 (UF) 1:2 (FU), fishmeal (F). 2 84–1 75 only (UM) and (FM) used. 3. Replacement significantly (P < 0.05) increased yield milk protein both mid-lactation. At stages were, by calculation, positive energy balance. replacement depressed...
Abstract Operational characteristics have been determined for fused silica capillary column (FSCC) GC/MS as applied to “extractable” priority polutants. Chromatographic data show excellent relative retention time (RRT) intralaboratory precision and interlaboratory accuracy when multiple internal standards are empolyed. Potential chromatographic problems, such overload “double peaking”, addressed. Response factor standard deviations (RSD) at 50 ng most of the extractable pollutants over long...
Summary Seventy-six first-calf cows (heifers), 32 second·calf and 39 adult participated in a trial which three diets composed of 60:40, 75:25, 90:10 proportions compound to hay (hay dry-matter digestibility 0·6) were given for the first 36 weeks lactation amounts provide daily an estimated 125, 156 MJ ad libitum digestible energy (DE) heifers, 156, 187 DE other parities. The intakes 150 200 heifers older respectively. Greater content diet larger allowance associated with increased occurrence...
Tannins can cause beneficial or harmful nutritional effects, but their great diversity has until now prevented a rational distinction between tannin structures and responses. An attempt been made to study this problem by examining the octanol−water solubilities of tannins. A relatively simple HPLC method developed for screening mixtures plant tannins partition coefficients (Kow coefficients). were isolated from fruits leaves different Acacia, Calliandra, Dichrostachys, Piliostigma species,...
SUMMARY Eight feeding trials on cattle showed that the response in live-weight gain was curvilinear when protein or energy level varied independently rations based poor quality roughages to which cereals and groundnut were variously added give a range of intakes. Live-weight increased by 0·12 lb/day for each 0·1 lb additional digestible crude protein/day at levels intake below 0·7 0·03 higher levels. It 0·4 starch equivalent daily/100 live weight total intakes 0·9 daily/ 100 0·2 Over 0·5–2·0...
Aeronautic transport has an effective necessity of reducing fuel consumption and emissions to deliver efficiency competitiveness driven by today commercial legislative requirements. Actual aircraft configurations scenario allows envisaging the signs a diffused technological maturity they seem very near their limits. This clearly shows radical innovations with particular reference propulsion systems aircraftarchitecture consequently. paper presents analyses discusses promising propulsive...
Summary Eight experiments, comprising four randomized-block feeding trials each with 20–45 animals and changeover-design nitrogen (N) balance 6–10 animals, were used to study the effect of addition formaldehyde fishmeal casein, severe heating fishmeal, tannin treatment a mixture vegetable protein-rich foods on utilization N for growth. Added in moderate amounts rations demonstrated within experiments be deficient N, quantities, but not preparations, diet critical growth save at very low...