scholarly journals Sexual maturity in rabbits defined by the physical and chemical characteristics of the semen

1978 ◽  
Vol 12 (1) ◽  
pp. 37-39 ◽  
Author(s):  
M. Macari ◽  
C. R. Machado
Keyword(s):  
New Zealand ◽  
Sexual Maturity ◽  
Chemical Characteristics ◽  
Potassium Ions ◽  
Sodium Ions ◽  
Mean Values ◽  
New Zealand White Rabbits ◽  
The Mean ◽  
Physical And Chemical ◽  
Artificial Vagina

Semen was collected weekly from New Zealand white rabbits from the 1st positive mounting test to 43 weeks of age by means of an artificial vagina. The mean values of the results obtained in the 1st and 20th collection weeks were respectively: volume (ml) 0·61 ± 0·30 and 0·70 ± 0·19; pH 7·22 ± 0·50 and 7·19 ± 0±15; concentration (sperm/mm3 x 103) 750 ± 207 and 381 ± 90; fructose (mg/l00 ml) 117 ± 58 and 203 ± 121; citric acid (mg/l00 ml) 256 ± 90 and 200 ± 97; sodium ions (mEq/l) 133 ± 31 and 163 ± 46; potassium ions (mEq/l) 40 ± 21 and 29 ± 14. On the basis of these results, New Zealand white rabbits reach sexual maturity by 6 months of age.

scholarly journals Intestinal Plasmacytosis in Rabbits: A Histologic and Ultrastructural Study

1996 ◽  
Vol 33 (6) ◽  
pp. 721-724 ◽  
Author(s):  
X. Li ◽  
J. G. Fox ◽  
S. E. Erdman ◽  
N. S. Lipman
Keyword(s):  
New Zealand ◽  
Plasma Cells ◽  
Experimental Studies ◽  
Electron Microscopic Examination ◽  
Electron Microscopic ◽  
Diffuse Infiltration ◽  
New Zealand White Rabbits ◽  
Infiltrating Cells ◽  
The Mean ◽  
Well Differentiated

A retrospective study revealed intestinal plasmacytosis in 53 of 102 rabbits used in various experimental studies and as controls. The breeds affected included New Zealand white ( n = 46), Dutch-belted ( n = 6), and Watanabe ( n = 1) rabbits. Sex predisposition was not found in any breed. The mean (± SD) ages were 3.1 ± 1.4 years for New Zealand white rabbits, 1.3 ± 1.1 for Dutch-belted rabbits, and 2 years for the Watanabe rabbit. The severity increased with animal age. The incidence was higher ( P < 0.05) in rabbits used in antibody production and cholesterol studies. The lesions were characterized by multifocal to diffuse infiltration of well-differentiated plasma cells in the intestinal mucosa. Electron microscopic examination revealed typical plasma cell morphology of the infiltrating cells. Small intestine and cecum were the major sites affected. In severe cases, colon, rectum, trachea, esophagus, mesenteric lymph node, and spleen were also involved.

scholarly journals Reproductive biology of Pêga Jackasses: characteristics of sperm-rich fraction collected using the split-ejaculate method

2016 ◽  
Vol 68 (4) ◽  
pp. 832-838
Author(s):  
L.E. Carvalho ◽  
J.M. Silva Filho ◽  
M.S. Palhares ◽  
A.L.R. Sales ◽  
A.T. Gonczarowska ◽  
...  
Keyword(s):  
Sperm Concentration ◽  
Morphological Characteristics ◽  
High Quality ◽  
Open Model ◽  
Mean Values ◽  
Normal Sperm ◽  
Semen Volume ◽  
The Mean ◽  
Semen Processing ◽  
Artificial Vagina

ABSTRACT The aim of this study was to evaluate the physical and morphological characteristics of the sperm-rich fraction of jackass semen. To this end, 130 ejaculates from five Pêga jackasses were collected using an open model artificial vagina. The sperm-rich fraction was collected using the split-ejaculate method and assessed for the number of mounts/ejaculate, for physical and morphological characteristics of the semen and number of doses produced/ejaculate. It was observed that all characteristics evaluated differed among the five jackasses, except for the head defect rates. The mean values obtained for the jackass sperm-rich fraction collected were: number of mounts/ejaculate - 1.27; semen volume - 20.21mL; motility - 84.53%; vigor - 4.46; motility after dilution - 80.10%; sperm concentration/mL - 894.38 x 106; total sperm/ejaculate - 16.14 x 109; number of insemination doses/ejaculate (400x106 motile sptz) - 33.39; number of insemination doses/ejaculate (800 x 106 motile sptz) - 16.69; and percentage of normal sperm - 90.46%. Thus, in the present experiment the split-ejaculate method using an open artificial vagina worked well with the jackasses, and the sperm-rich fraction of the ejaculate of Pêga jackasses had high quality and sperm concentration, allowing its use for semen processing without reducing the number of insemination doses produced per ejaculate.

Computed tomographic study of safe implantation corridors in rabbit lumbar vertebrae

2017 ◽  
Vol 30 (05) ◽  
pp. 357-363 ◽  
Author(s):  
Tisha Harper ◽  
Stephen Joslyn ◽  
Julia Whittington ◽  
Devon Hague ◽  
Mark Mitchell ◽  
...  
Keyword(s):  
Computed Tomography ◽  
New Zealand ◽  
Three Dimensional ◽  
Lumbar Vertebrae ◽  
Bone Stock ◽  
Computed Tomographic ◽  
Mean Width ◽  
Entry Points ◽  
New Zealand White Rabbits ◽  
The Mean

Summary Objectives: A study was performed to evaluate the lumbar vertebrae of domestic rabbits using computed tomography (CT) in order to identify safe corridors for implant insertion. Methods: Computed tomography imaging of 20 adult New Zealand white rabbits was evaluated using three-dimensional multi -planar reconstruction, and safe corridors were determined. Following corridor determination, implant placement was performed, and imaging was repeated. Results: The cranial and caudal endplates contained the majority of the vertebral bone stock, and were an average of 3.14 and 3.30 mm in length, respectively. The mean safe corridor angle was 62.9 degrees (range: 58.8–66.7), and the mean width of the corridor was 2.03 mm (range: 1.60– 2.07). Post-placement imaging revealed that 35% of the pins demonstrated errors of placement, most commonly canal impingement. Conclusions: The results of the corridor evaluation indicate that an insertion angle of approximately 60 degrees relative to the sagittal midline is appropriate for implant insertion in the lumbar vertebrae of New Zealand white rabbits. Additionally, due to the hourglass shape of rabbit vertebrae, the endplates provide maximal bone stock for implant purchase, so insertion should be attempted in these regions. However, the high percentage of errors in placement indicate the need to more clearly define entry points to access the canal, and highlight the challenges of appropriate placement in the small bones of rabbits.

scholarly journals Study on Blood Biochemical Profile in Relation to Age and Scrotal Biometry in Adolescent Surti Bucks

2018 ◽  
Vol 14 (2) ◽  
Author(s):  
D. V. Chaudhari ◽  
A. J. Dhami ◽  
C.P. Parmar, J.A. Patel and M.M. Pathan K. Hadiya ◽  
S. C. Parmar ◽  
D. V. Chaudhari
Keyword(s):  
Blood Plasma ◽  
Sexual Maturity ◽  
Semen Quality ◽  
Reproductive Potential ◽  
Mean Values ◽  
Blood Biochemical ◽  
Standard Procedures ◽  
Length Width ◽  
The Mean ◽  
Plasma Profile

The study was undertaken on 11 Surti male kids of identical age and birth weight from 14 weeks of age till puberty and sexual maturity up to 47 weeks (12 months) of age. The scrotal biometry, i.e., length, width, circumference (cm) and volume (cm3) were recorded using standard procedures at 3 weeks intervals. The mean weight of animals at birth, 14 and 35 weeks of age was 1.53±0.05, 9.86±0.61 kg and 17.84±1.09 kg, respectively and thereafter it did not change much till 47 weeks of age. Similarly, the mean values of scrotal length, width, circumference (cm) and scrotal volume (cm3) at 14 weeks of age were 2.89±0.22, 2.05±0.17, 8.82±0.72 and 21.36±0.93, respectively, which then gradually increased with an advancing age till 35 weeks of age reaching 10.65±0.30, 7.55±0.24, 19.45±0.65 and 200.45±16.67, respectively, which later became almost stable. At puberty, the average age and body weight were 27.00±0.75 weeks and 15.16±0.56 kg, and at sexual maturity 38.18±0.90 weeks and 19.61±0.93 kg, respectively. Great individual variation was noted in all the biometric traits among bucks studied. The blood plasma profile studied at bimonthly intervals revealed significant increase in total protein and ALT, and decrease in cholesterol and cobalt concentrations with advancing age. However, the AST and macro-micro minerals did not vary, suggestive of acquiring adult profile by 6 months of age. Based on the age, scrotal biometry, semen quality and blood biochemistry, it could be inferred that the Surti bucks attained full reproductive potential at around 9- 10 months of age with stable blood plasma profile.

scholarly journals Vulnerability of different classes of low-rise buildings in the
1987 Edgecumbe, New Zealand, earthquake

1997 ◽  
Vol 30 (3) ◽  
pp. 227-241 ◽  
Author(s):  
David J. Dowrick ◽  
David A. Rhoades
Keyword(s):  
New Zealand ◽  
Earthquake Risk ◽  
Confidence Limits ◽  
Damage Cost ◽  
Distribution Fitting ◽  
Mean Values ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
The Mean ◽  
Earthquake Risk Assessment

This paper describes an analysis of costs of damage to non-domestic buildings (all tow rise) in the Mw = 6.6 Edgecumbe New Zealand earthquake of 2 March 1987. The damage cost for each building was converted to a damage ratio by dividing it by the replacement value of that building. For the MM7 and MM9 intensity zones, the mean values and statistical distributions of these damage ratios were then found, the lognormal distribution fitting the data well. The data was then divided into subsets according to selected classes of construction, and the vulnerabilities of these classes were measured and compared in terms of their mean damage ratios and the associated 95% confidence limits. The classes of building examined included classifications by era of design, number of storeys, materials of construction, and building use. Valuable insights into earthquake resistant design and earthquake risk assessment parameters were obtained through the differences observed between classes, notably significant reductions in the vulnerability of buildings associated with improved ductility provisions.

scholarly journals Physical and chemical characterization of mama-cadela and araçá fruits collected in the cerrado of Goiás

2020 ◽  
Vol 13 (7) ◽  
pp. 39
Author(s):  
J. L. C. Souza ◽  
L. B. Silva ◽  
R. X. Costa ◽  
M. C. Vieira
Keyword(s):  
Seed Mass ◽  
Chemical Characterization ◽  
Titratable Acidity ◽  
Transverse Diameter ◽  
Mean Values ◽  
Physical And Chemical Characterization ◽  
The Mean ◽  
Physical And Chemical ◽  
Fruit Mass

The objective of this work was to evaluate the physical and chemical characteristics of fruits of different matrices of mama-cadela and araçá. Physical evaluations were: longitudinal fruit diameter (DLF), fruit cross diameter (DTF), fruit mass (MF), longitudinal seed diameter (DLS), seed transverse diameter (DTS) and seed mass (MS) . Chemical analyzes consisted of analyzing pH, titratable acidity, humidity and ashes. The results of the physical and chemical analyzes were subjected to analysis of variance (ANOVA) and the Scoott-Knott test (p <0.05). The mean values of DLF; DTF; MF; DLS; DTS; MS; pH; titratable acidity; moisture and ash of the bitch-breast fruits were: 2.18 cm; 1.95 cm; 4.34 g; 1.73 cm; 1.40 cm; 1.57 g; 4.97; 0.49%; 66.31% and 32.50%. The fruits of araçá presented average values of longitudinal, transverse diameter, fruit mass, pH and titratable acidity: 2.58 cm; 2.03 cm; 6.39 g; 3.44; and 0.94%. The results showed variability among the mama-cadela breeds regarding chemical and physical evaluations; and no differences were observed between the araçá matrices in the physical variables..

Increase in Proteinuria and Reduction in Number of Anionic Sites on the Glomerular Basement Membrane in Rabbits by Infusion of Human Nephrotic Plasma in Vivo

1989 ◽  
Vol 77 (1) ◽  
pp. 43-48 ◽  
Author(s):  
Alan H. Wilkinson ◽  
Cecilia Gillespie ◽  
Barry Hartley ◽  
D. Gwyn Williams
Keyword(s):  
Nephrotic Syndrome ◽  
New Zealand ◽  
Basement Membrane ◽  
Normal Subjects ◽  
Cationic Polymer ◽  
Anionic Sites ◽  
New Zealand White Rabbits ◽  
The Mean ◽  
Control Plasma

1. Intraortic suprarenal infusion in vivo of New Zealand White rabbits with plasma from patients with the nephrotic syndrome reduced the number of anionic sites labelled by the cationic polymer polyethyleneimine in the lamina rara iterna to 14.0 ± 2.7 per 1000 nm of lamina rara interna (mean ± sd) compared with 18.7 ± 2.1 (P < 0.005) after infusion of plasma from normal subjects. 2. Proteinuria increased in all nine animals infused with nephrotic plasma and in two of seven infused with control plasma (P < 0.01). The mean increase in proteinuria in the animals infused with nephrotic plasma was 246 mg/l (P < 0.05), whereas in those infused with control plasma there was no increase. 3. We conclude that nephrotic plasma contains a factor(s) capable of neutralizing the charge of these anionic sites and concomitantly increasing proteinuria.

scholarly journals Specular microscopic observations of the corneal endothelium in the normal rabbit

1981 ◽  
Vol 15 (4) ◽  
pp. 393-395 ◽  
Author(s):  
Denise Montanaro Sailstad ◽  
R. L. Peiffer
Keyword(s):  
Endothelial Cells ◽  
New Zealand ◽  
Corneal Endothelium ◽  
Corneal Thickness ◽  
Specular Microscopy ◽  
Clinically Normal ◽  
New Zealand White Rabbits ◽  
Mean Diameter ◽  
The Mean ◽  
Number Of Cells

Endothelial specular microscopy and pachometry were performed on both eyes of 14 young adult New Zealand white rabbits with clinically normal eyes. Endothelial cells of the central corneas formed a mosaic-like pattern of homogenous hexagonal cells with a mean diameter of 20·6 ± 1·0, μm sd. The mean number of cells per mm was 2998 ± 326 sd and the mean corneal thickness was 0·38 ± 0·02 mm sd.

scholarly journals Discreditation of the pyroxenoid mineral name ‘marshallsussmanite’ with a reinstatement of the name schizolite, NaCaMnSi3O8(OH)

2019 ◽  
Vol 83 (03) ◽  
pp. 473-478
Author(s):  
Joel D. Grice ◽  
Aaron J. Lussier ◽  
Henrik Friis ◽  
Ralph Rowe ◽  
Glenn G. Poirier ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Detailed Examination ◽  
New Mineral ◽  
Optical Parameters ◽  
X Ray Diffraction ◽  
Alkaline Complex ◽  
Mean Values ◽  
International Mineralogical Association ◽  
The Mean ◽  
Physical And Chemical

AbstractSchizolite, originating from the type locality, Tutop Agtakôrfia, in the Ilímaussaq alkaline complex, Julianehåb district, South Greenland, was described initially by Winther (1901) with additional data being supplied by Bøggild (1903). Recently, a proposal for the new mineral ‘marshallsussmanite’ was submitted to, and approved by, the International Mineralogical Association Commission on New Minerals, Nomenclature and Classification (IMA2013-067) by Origlieri et al. (2013). Results from the detailed examination of two schizolite cotype samples presented here, using single-crystal and powder X-ray diffraction, and optical properties, confirms it to be equivalent to ‘marshallsussmanite’. Historical precedence sets a priority for discrediting the name ‘marshallsussmanite’ in favour of the original, more-than-a century-old name, schizolite. The two schizolite samples investigated vary slightly in physical and chemical properties but are consistent overall. The prismatic crystals are pale red or pink to brownish. Schizolite is brittle with a splintery aspect. It is biaxial (+), with average optical parameters: α = 1.626 ± 0.003, β = 1.630 ± 0.002, γ = 1.661 ± 0.002, 2Vmeas = 71(4)° and 2Vcalc = 40°; there is no pleochroism. Electron microprobe analysis shows both samples have nearly identical compositions (differences &lt;0.4 wt.% oxide), with the mean values of: SiO2 52.6(4); Al2O3 0.005(1); FeO 2.54(2); MnO 13.86(9); CaO 17.9(4); Na2O 8.9(1); and H2O 2.59(2) wt.% oxide; this corresponds to a mean formula of: Na1.00(2)Ca1.11(7)Mn0.68(1)Fe0.12(0)Si3.041(1)O8(OH). Final least-squares structure refinements for both samples converged at R1 values ≤2.0%; H atoms were located in all refinements.

Carbohydrate Composition And Catabolism Of Five Abnormal Fibrinogens

1981 ◽  
Author(s):  
D A Lane ◽  
A K Allen ◽  
J Markwick ◽  
I Mackie ◽  
E Thompson ◽  
...  
Keyword(s):  
New Zealand ◽  
Sialic Acid ◽  
Amino Acid ◽  
Amino Acid Analysis ◽  
Amino Sugars ◽  
Carbohydrate Composition ◽  
Analysis Techniques ◽  
New Zealand White Rabbits ◽  
Neutral Sugars ◽  
The Mean

An investigation has been made of the carbohydrate composition and catabolism of five abnormal fibrinogens. These were fibrinogens, London, Manchester, Oslo II, a fetal fibrinogen isolated from pooled cord blood and a newly discovered case of hypodysfibrinogenemia which has been tentatively designated fibrinogen London II. The carbohydrate composition of fibrinogen (mol sugar/mol of fibrinogen) was studied by amino acid analysis techniques for amino sugars and methanolysis followed by GLC for neutral sugars and sialic acid. The adult variants did not differ significantly from the normal adult fibrinogen which typically contained 22 mannose, 18 galactose, 20 N-acetylglucosamine, 4 N-acetyl- galactosamine and 12 sialic acid residues. However, fetal fibrinogen was markedly different, containing 15 mannose, 21 galactose, 14 N-acetylglucosamine, 20 N-acetylgalactosamine and 20 sialic acid residues. The catabolism of the I125- labelled fibrinogens was studied in New Zealand White rabbits. Normal fibrinogen was eliminated with a mean t1/2 of 50.2 h (n = 5, range 42-60). The mean t1/2 of fetal fibrinogen was similar 47.7 h (n = 5, range 41-70) and fibrinogens London, London II, Manchester and Oslo II had t1/2’s of 39, 42, 38 and 44 h respectively. It is concluded that (a) the increased sialic acid on fetal fibrinogen is probably due to there being more O-glycosylated serine or threonine residues and this does not alter catabolism, (b) the reduced plasma fbgen of London II is caused by impaired synthesis rather than hypercatabolism, and (c) the catabolism of fibrinogen is only minimally dependent upon the full integrity of the regions of the molecules involved in polymerisation and fibrinopeptide releasing functions.

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