Environmental Effects of Dredging. Factors Affecting Leachate Quality.

1989 ◽  
Author(s):  
James M. Brannon ◽  
Judith C. Pennington ◽  
Tommy E. Myers ◽  
Cynthia B. Price
Keyword(s):  
Environmental Effects ◽  
Factors Affecting ◽  
Leachate Quality

Breed and environmental factors affecting the reconception of indigenous beef cows in Botswana

1982 ◽  
Vol 35 (3) ◽  
pp. 413-420
Author(s):  
N. G. Buck ◽  
D. Light
Keyword(s):  
Environmental Factors ◽  
Environmental Effects ◽  
Reproductive Performance ◽  
Beef Cows ◽  
The Other ◽  
Factors Affecting ◽  
Lactating Cows ◽  
Management Interventions ◽  
Lower Fertility ◽  
Main Effects

ABSTRACTThe breeding records of 2710 lactating cows, of the Africander (1208), Tswana (542) and Tuli (960) breeds, were analysed to examine the effects of breed and environment on reconception. The reconception rate of Africander cows (0·56) was significantly lower than that of Tswana and Tuli cows (0·80 and 0·81 respectively) (P<0·01). The environmental effects of ranch, calving year, calving period and age/parity all had significant effects on reconception (P<0·01). Interactions between breed and the other main effects were all significant.The Africander is considered to be a breed of lower fertility than the other two Sanga breeds, the Tswana and Tuli, in Botswana. The results are discussed with respect to determining management interventions to improve cow reproductive performance.

THE STUDY OF HYDROGEN BONDING AND RELATED PHENOMENA BY ULTRAVIOLET LIGHT ABSORPTION: PART I. INTRODUCTION

1958 ◽  
Vol 36 (1) ◽  
pp. 180-188 ◽  
Author(s):  
W. F. Forbes ◽  
J. F. Templeton
Keyword(s):  
Hydrogen Bonding ◽  
Environmental Factors ◽  
Environmental Effects ◽  
Light Absorption ◽  
Bond Formation ◽  
Benzoic Acids ◽  
Intermolecular Hydrogen Bonding ◽  
Dimer Formation ◽  
Factors Affecting ◽  
Solvent Molecules

Hydrogen bonding, which is known to give rise to dimer formation in benzoic acids and similar compounds, may affect solution spectra by intermolecular and by intramolecular bond formation. Generally environmental factors affecting absorption spectra can be conveniently divided into three types: intermolecular hydrogen bonding between solute molecules only; intermolecular hydrogen bonding between solute and solvent molecules; and environmental effects not involving the formation of hydrogen bonds.Distinct evidence for these types of interaction is deduced from ultraviolet spectra, and various implications of the spectral analyses are discussed.

Design by Analysis, Codes, Standards and Rules on EAF - Applicability to Stainless Steels in PWR Primary Piping

2021 ◽  
Author(s):  
Jussi Solin ◽  
Tommi Seppänen ◽  
Rami Vanninen ◽  
Erkki Pulkkinen ◽  
Petri Lemettinen
Keyword(s):  
Environmental Effects ◽  
Stainless Steels ◽  
Pressure Vessel ◽  
State Of The Art ◽  
Design Codes ◽  
Design Code ◽  
Factors Affecting ◽  
Life Management ◽  
Quantitative Analyses ◽  
Design And Manufacture

Abstract This paper discusses general principles, assumptions and challenges in management of fatigue in operating NPP’s. The roots and state-of-the-art in different design codes, design curves and rules are briefly reviewed. It is noted that the ASME Boiler and Pressure Vessel Code, Section III was originally prepared as a Design Code to ensure appropriate design and manufacture of nuclear vessels. ‘Design by Rule’ was replaced by ‘Design by Analysis’. Today, ASME III and the related international codes are also used for ‘Operation by Analysis’. Demonstration that the fatigue usage factor is less than unity is not sufficient for proactive component life management. Quantitative analyses of fatigue usage and factors affecting it are needed, including the environmental effects. Differences between the design curves and penalty factors for environmental effects are illustrated through selected examples.

Factors Affecting Reception Range of Ultrasonic Tags in a Georgia Estuary

2010 ◽  
Vol 44 (5) ◽  
pp. 17-24 ◽  
Author(s):  
Charles F. Cotton
Keyword(s):  
Field Test ◽  
Deep Water ◽  
Environmental Effects ◽  
Environmental Variables ◽  
Factors Affecting ◽  
Snapping Shrimp ◽  
Large Aggregation ◽  
Significant Difference ◽  
Ultrasonic Transmitter

AbstractUltrasonic tags are commonly used for marine biotelemetry, but little or no information exists about the in situ reception range or how different environmental variables affect the reception range of telemetry equipment. In this study, I used active tracking techniques to empirically determine three environmental effects on reception range of ultrasonic tags. Specifically, I examined the effects of (1) tag depth, (2) depth under the hydrophone, and (3) presence of snapping shrimp (Alpheidae) on the reception range of an ultrasonic transmitter (tag) in a Georgia estuary. Placing the tag in deep (8.8‐11.3 m) versus shallow (0.6‐1.5 m) water while the hydrophone was over deep water (3.4‐11.3 m) caused no significant difference in reception range. Placing the hydrophone over shallow (0.6‐2.7 m) versus deep (6.4‐9.1 m) water while the tag was in shallow (1.2‐1.8 m) water caused a significant decrease in reception range. The presence of a large aggregation of snapping shrimp between the hydrophone and the tag also caused a significant decrease in reception range. This study highlights the need for researchers to field-test equipment before conducting telemetry projects.

scholarly journals Growth performance of Boer goat in relation to sex and type of birth at the Goat Research Station in Nepal

2021 ◽  
Vol 49 (2) ◽  
pp. 166-169
Author(s):  
R Kadel ◽  
S Malla ◽  
SH Ghimire ◽  
BB KC ◽  
PB Shrestha
Keyword(s):  
Birth Weight ◽  
Growth Performance ◽  
Environmental Effects ◽  
Least Square ◽  
Research Station ◽  
Weaning Weight ◽  
Factors Affecting ◽  
Boer Goat

This study was carried out at Goat Research Station, Bandipur, Tanahun, Nepal to evaluate the different factors affecting the growth performance of pure Boer goat since its arrival on 2015. A total of 225 kids of Boer goat born from 218 kidding does recorded between 2015 and 2019 were used for analysis of birth weight, weaning weight, eight month weight and yearling weight in response to sex and type of birth. The overall least square means for birth weight is 3.246 ± 0.056 kg, weaning weight is 17.86 ± 0.105 kg, eight month weight is 28.66 ± 0.2.6 kg and yearling weight is 45.10 ± 0.218 kg. The least square means across sex for birth weight, weaning weight, eight month weight and yearling weight were 3.368 ± 0.090 kg, 18.42 ± 0.226 kg, 31.69 ± 0.415 kg and 49.29 ± 0.707 kg for male and 3.136 ± 0.068 kg, 17.43 ±0.150 kg, 26.35 ± 0.378 kg and 42.18 ± 0.778 kg for female respectively. Sex and type of birth have significant effect on birth weight and weaning weight, while for eight month weight and yearling weight, sex have significant effect but no significant effect on type of birth. In conclusion, the overall growth performance of Boer goat in Goat Research Station was to the expectation and may increase on improvement of management and environmental effects. Bang. J. Anim. Sci. 2020. 49 (2): 166-169

Progress In The Practical Application Of Automated Image Analysis To Tem Negatives

1977 ◽  
Vol 35 ◽  
pp. 214-217
Author(s):  
F. A. Heckman ◽  
E. Redman ◽  
J.E. Connolly
Keyword(s):  
Image Analysis ◽  
Image Quality ◽  
Exposure Time ◽  
Image Contrast ◽  
Automated Image Analysis ◽  
Practical Application ◽  
Factors Affecting ◽  
High Image Quality ◽  
Qualitative Evidence ◽  
Comprehensive Study

In our initial publication on this subject1) we reported results demonstrating that contrast is the most important factor in producing the high image quality required for reliable image analysis. We also listed the factors which enhance contrast in order of the experimentally determined magnitude of their effect. The two most powerful factors affecting image contrast attainable with sheet film are beam intensity and KV. At that time we had only qualitative evidence for the ranking of enhancing factors. Later we carried out the densitometric measurements which led to the results outlined below.Meaningful evaluations of the cause-effect relationships among the considerable number of variables in preparing EM negatives depend on doing things in a systematic way, varying only one parameter at a time. Unless otherwise noted, we adhered to the following procedure evolved during our comprehensive study:Philips EM-300; 30μ objective aperature; magnification 7000- 12000X, exposure time 1 second, anti-contamination device operating.

Imaging molecules adsorbed onto electrodes under potential control by scanning probe microscopy

1991 ◽  
Vol 49 ◽  
pp. 376-377 ◽  
Author(s):  
N.J. Tao ◽  
J.A. DeRose ◽  
P.I. Oden ◽  
S.M. Lindsay
Keyword(s):  
Surface Charge ◽  
Environmental Effects ◽  
Scanning Probe Microscopy ◽  
Statistical Significance ◽  
Electrochemical Methods ◽  
Surface Structures ◽  
Scanning Probe ◽  
Potential Control ◽  
Afm Imaging ◽  
Special Circumstances

Clemmer and Beebe have pointed out that surface structures on graphite substrates can be misinterpreted as biopolymer images in STM experiments. We have been using electrochemical methods to react DNA fragments onto gold electrodes for STM and AFM imaging. The adsorbates produced in this way are only homogeneous in special circumstances. Searching an inhomogeneous substrate for ‘desired’ images limits the value of the data. Here, we report on a reversible method for imaging adsorbates. The molecules can be lifted onto and off the substrate during imaging. This leaves no doubt about the validity or statistical significance of the images. Furthermore, environmental effects (such as changes in electrolyte or surface charge) can be investigated easily.

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