292 research outputs found
Marginal inferences about variance components in a mixed linear model using Gibbs sampling
International audienc
SELEKSI DAN KAPASITASI SPERMATOZOA DENGAN METODE PERCOLL GRADIENT VKYUK FERTILISASI OOSIT DAN PRODUKSIEMBRIO IN VITRO PADA SAPI
This research has been conducted at the laboratory of in vitro fertilization of the University ofWisconsin, USA. These embryos may be used for improving genetic value of Indonesian cattle. Ovaries were collected from slaughterhouse in Wisconsin. Oocytes were matured in TCM-199 medium enriched with FSH 10 \i\lm\, estradiol 17 P lul/ml and 10 % FCS for 20 hours. The oocytes were fertilized in vitro with motile sperm selected and capacitated by using the percoll gradient with 2 ml vs 0.5 ml per layer as treatment A and B respectively. Sperm and oocytes were incubated in fertilization medium (mTALP) for 20 hours. All zygotes were cultured in CRlaa medium up to btastocyst stage and were fed with serum 5 \iV 50 )j.l in culture medium on day 6. Percentages of cleavage, morula, blastocyst, expanded blastocyst, unfertilized and degenerated ova in this study were 86.3 vs 91.6 %, 53.3 % vs 75.9 %; 32.6 % vs 63.4 %; 21.1 % vs 33.0 %; 13.7 % vs 8.4 %, 32.9% vs 15.6 % for treatment A (n=1007) vs B (n=1055), respectively. Based on result of this study, it is concluded that the best method for IVP (in vitro production) of cattle embryos is using percoll gradient with 500 ul per layer
Correction: Metal complexes as a promising source for new antibiotics
Correction for âMetal complexes as a promising source for new antibioticsâ by Angelo Frei et al., Chem. Sci., 2020, 11, 2627â2639
Why alternative teenagers self-harm: exploring the link between non-suicidal self-injury, attempted suicide and adolescent identity
Background:
The term âself-harmâ encompasses both attempted suicide and non-suicidal self-injury (NSSI). Specific adolescent subpopulations such as ethnic or sexual minorities, and more controversially, those who identify as âAlternativeâ (Goth, Emo) have been proposed as being more likely to self-harm, while other groups such as âJocksâ are linked with protective coping behaviours (for example exercise). NSSI has autonomic (it reduces negative emotions) and social (it communicates distress or facilitates group âbondingâ) functions. This study explores the links between such aspects of self-harm, primarily NSSI, and youth subculture.<p></p>
Methods:
An anonymous survey was carried out of 452 15 year old German school students. Measures included: identification with different youth cultures, i.e. Alternative (Goth, Emo, Punk), Nerd (academic) or Jock (athletic); social background, e.g. socioeconomic status; and experience of victimisation. Self-harm (suicide and NSSI) was assessed using Self-harm Behavior Questionnaire and the Functional Assessment of Self-Mutilation (FASM).<p></p>
Results:
An âAlternativeâ identity was directly (râââ0.3) and a âJockâ identity inversely (râââ-0.1) correlated with self-harm. âAlternativeâ teenagers self-injured more frequently (NSSI 45.5% vs. 18.8%), repeatedly self-injured, and were 4â8 times more likely to attempt suicide (even after adjusting for social background) than their non-Alternative peers. They were also more likely to self-injure for autonomic, communicative and social reasons than other adolescents.<p></p>
Conclusions:
About half of âAlternativeâ adolescentsâ self-injure, primarily to regulate emotions and communicate distress. However, a minority self-injure to reinforce their group identity, i.e. âTo feel more a part of a groupâ
Display of probability densities for data from a continuous distribution
Based on cumulative distribution functions, Fourier series expansion and
Kolmogorov tests, we present a simple method to display probability densities
for data drawn from a continuous distribution. It is often more efficient than
using histograms.Comment: 5 pages, 4 figures, presented at Computer Simulation Studies XXIV,
Athens, GA, 201
Infochemical-tritrophic Interactions of Soybean Aphids-host Plants-natural Enemies and Their Practical Applications in Pest Management
The soybean aphid, Aphis glycines Matsumura, is a newly invasive insect species that seriously threatens U.S. soybean production. This aphid pest has kept haunting many soybean growers by developing large colonies on soybeans in North America since 2000. Since its first appearance inWisconsin, it has spread to over half of US states and southern provinces in Canada. The heavy infestation of this pest whittles soybean growersâ profits and causes hundreds of million dollar losses. The present chapter will mainly describe efforts in studying aphid chemical ecology and sensory physiology for understanding how male aphids find their mates and host plants. It will also cover research efforts to understand host plant associated volatiles being used as cues for overwintering host plant location. In addition, findings on how soybean plant defensive system works against aphid infestation, as well as how those induced plant volatiles are used by aphidâs natural enemies for prey location will be presented. Finally, the use the basic understandings for developing useful tools for soybean aphid practical control will be discussed
New Measurement of Parity Violation in Elastic Electron-Proton Scattering and Implications for Strange Form Factors
We have measured the parity-violating electroweak asymmetry in the elastic
scattering of polarized electrons from the proton. The result is A = -15.05 +-
0.98(stat) +- 0.56(syst) ppm at the kinematic point theta_lab = 12.3 degrees
and Q^2 = 0.477 (GeV/c)^2. The measurement implies that the value for the
strange form factor (G_E^s + 0.392 G_M^s) = 0.025 +- 0.020 +- 0.014, where the
first error is experimental and the second arises from the uncertainties in
electromagnetic form factors. This measurement is the first fixed-target parity
violation experiment that used either a `strained' GaAs photocathode to produce
highly polarized electrons or a Compton polarimeter to continuously monitor the
electron beam polarization.Comment: 8 pages, 4 figures, Tex, elsart.cls; revised version as accepted for
Phys. Lett.
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