68 research outputs found
Replacing Myths with Facts: Sex-Selective Abortion Laws in the United States
Sex selection is the practice of attempting to control the sex of one's offspring in order to achieve a desired sex. One method of sex selection is sex-selective abortion. Laws banning sex-selective abortion are proliferating in the United States. Eight states have enacted laws prohibiting sex-selective abortion. Twenty-one states and the federal government have considered such laws since 2009. Those laws prohibit the performance of an abortion if sought based on the sex of the fetus and provide for both criminal and civil penalties in most cases.A great deal of misinformation exists regarding sex selection in the United States. We have identified six inaccuracies commonly associated with sex-selective abortion and laws prohibiting it. They appear, among other places, in statements made by legislators, testimony submitted to legislatures, and reports issued by legislative committees that have considered or adopted laws banning sex-selective abortion. We present each piece of inaccurate information as a "myth." This Report draws on legal research, empirical analysis of U.S. birth data, field-work, and an extensive review of scholarly publications in social sciences, law and other disciplines to replace these myths with facts
Positive Photoresist Hardening Using Formaldehyde Soak Methods
KTI-820, a positive photoresist, was hardened using a formaldehyde and hydrochloric acid solution consisting of five parts hydrochloric acid (HC1)and one part formaldehyde. The experiment involved varying the duration of the bath from three to ten minutes and varying the temperature of the bath from 70 to 100 degrees centigrade. The results of this process showed resist flow and thickness loss. The thickness loss was a result of the EC1 attacking the resist during the soak in the HC1 and formaldehyde solution
Replacing Myths with Facts: Sex-Selective Abortion Laws in the United States
Several countries in the world have sex ratios at birth that are as high or higher than China and India, including countries with predominantly white populations. Nonetheless, immigrant communities in the United States from China and India are consistently accused of harboring a preference for sons. It is supposedly this preference for sons that leads Asian Americans to abort female fetuses. In response, eight states have enacted bans on sex-selective abortion and 21 states and the United States Congress have considered such bans.
Proponents of sex-selective abortion bans claim that the United States is one of the few countries in the world where sex-selective abortion is not prohibited. However, our research reveals that only four countries explicitly prohibit sex-selective abortion and that, instead, many countries that are concerned with sex selection prohibit the practice even before the embryo is implanted in the uterus. Our research also reveals that sex-selective abortion bans are not likely to change sex ratios at birth. In a study we conducted on sex ratios in two states that adopted sex-selective abortion bans over 15 years ago—Illinois and Pennsylvania—we found that the laws were not associated with changes in sex ratios.
Laws banning sex-selective abortion purport to combat gender discrimination. However, the text of the laws and the statements made in support of the bans during legislative hearings make it clear that they are intended to place restrictions on abortion services generally. Moreover, the laws purport to solve a problem that may not exist at all in the United States. Rather than changing behavior or addressing a purported problem, sex-selective abortion bans are likely to lead to the denial of health care services to Asian American women. Many of the laws require medical professionals to scrutinize a woman’s reproductive choices. Since it is difficult to determine the true reason a woman has chosen to terminate her pregnancy, medical professionals may err on the side of caution and deny care to women in order to avoid liability under the law, even when a woman is not seeking a sex-selective abortion. Laws banning sex-selective abortion have been enacted on the basis of misinformation and harmful stereotypes about Asian Americans. We do not support the practice of sex selection by any means, but rather than combating discrimination, sex-selective abortion bans perpetuate it
Replacing Myths with Facts: Sex-Selective Abortion Laws in the United States
Several countries in the world have sex ratios at birth that are as high or higher than China and India, including countries with predominantly white populations. Nonetheless, immigrant communities in the United States from China and India are consistently accused of harboring a preference for sons. It is supposedly this preference for sons that leads Asian Americans to abort female fetuses. In response, eight states have enacted bans on sex-selective abortion and 21 states and the United States Congress have considered such bans.
Proponents of sex-selective abortion bans claim that the United States is one of the few countries in the world where sex-selective abortion is not prohibited. However, our research reveals that only four countries explicitly prohibit sex-selective abortion and that, instead, many countries that are concerned with sex selection prohibit the practice even before the embryo is implanted in the uterus. Our research also reveals that sex-selective abortion bans are not likely to change sex ratios at birth. In a study we conducted on sex ratios in two states that adopted sex-selective abortion bans over 15 years ago—Illinois and Pennsylvania—we found that the laws were not associated with changes in sex ratios.
Laws banning sex-selective abortion purport to combat gender discrimination. However, the text of the laws and the statements made in support of the bans during legislative hearings make it clear that they are intended to place restrictions on abortion services generally. Moreover, the laws purport to solve a problem that may not exist at all in the United States. Rather than changing behavior or addressing a purported problem, sex-selective abortion bans are likely to lead to the denial of health care services to Asian American women. Many of the laws require medical professionals to scrutinize a woman’s reproductive choices. Since it is difficult to determine the true reason a woman has chosen to terminate her pregnancy, medical professionals may err on the side of caution and deny care to women in order to avoid liability under the law, even when a woman is not seeking a sex-selective abortion. Laws banning sex-selective abortion have been enacted on the basis of misinformation and harmful stereotypes about Asian Americans. We do not support the practice of sex selection by any means, but rather than combating discrimination, sex-selective abortion bans perpetuate it
Male infertility-linked point mutation disrupts the Ca2+ oscillation-inducing and PIP2 hydrolysis activity of sperm PLCζ
A male infertility-linked human PLCζ (phospholipase Cζ) mutation introduced into mouse PLCζ completely abolishes both in vitro PIP2 (phosphatidylinositol 4,5-bisphosphate) hydrolysis activity and the ability to trigger in vivo Ca2+ oscillations in mouse eggs. Wild-type PLCζ initiated a normal pattern of Ca2+ oscillations in eggs in the presence of 10-fold higher mutant PLCζ, suggesting that infertility is not mediated by a dominant-negative mechanism
Prostate Cancer Patients Under Active Surveillance with a Suspicious Magnetic Resonance Imaging Finding Are at Increased Risk of Needing Treatment: Results of the Movember Foundation's Global Action Plan Prostate Cancer Active Surveillance (GAP3) Consortium.
BACKGROUND: The inclusion criterion for active surveillance (AS) is low- or intermediate-risk prostate cancer. The predictive value of the presence of a suspicious lesion at magnetic resonance imaging (MRI) at the time of inclusion is insufficiently known. OBJECTIVE: To evaluate the percentage of patients needing active treatment stratified by the presence or absence of a suspicious lesion at baseline MRI. DESIGN SETTING AND PARTICIPANTS: A retrospective analysis of the data from the multicentric AS GAP3 Consortium database was conducted. The inclusion criteria were men with grade group (GG) 1 or GG 2 prostate cancer combined with prostate-specific antigen <20 ng/ml. We selected a subgroup of patients who had MRI at baseline and for whom MRI results and targeted biopsies were used for AS eligibility. Suspicious MRI was defined as an MRI lesion with Prostate Imaging Reporting and Data System (PI-RADS)/Likert ≥3 and for which targeted biopsies did not exclude the patient for AS. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: The primary outcome was treatment free survival (FS). The secondary outcomes were histological GG progression FS and continuation of AS (discontinuation FS). RESULTS AND LIMITATIONS: The study cohort included 2119 patients (1035 men with nonsuspicious MRI and 1084 with suspicious MRI) with a median follow-up of 23 (12-43) mo. For the whole cohort, 3-yr treatment FS was 71% (95% confidence interval [CI]: 69-74). For nonsuspicious MRI and suspicious MRI groups, 3-yr treatment FS rates were, respectively, 80% (95% CI: 77-83) and 63% (95% CI: 59-66). Active treatment (hazard ratio [HR] = 2.0, p < 0.001), grade progression (HR = 1.9, p < 0.001), and discontinuation of AS (HR = 1.7, p < 0.001) were significantly higher in the suspicious MRI group than in the nonsuspicious MRI group. CONCLUSIONS: The risks of switching to treatment, histological progression, and AS discontinuation are higher in cases of suspicious MRI at inclusion. PATIENT SUMMARY: Among men with low- or intermediate-risk prostate cancer who choose active surveillance, those with suspicious magnetic resonance imaging (MRI) at the time of inclusion in active surveillance are more likely to show switch to treatment than men with nonsuspicious MRI
Derivatization of estrogens enhances specificity and sensitivity of analysis of human plasma and serum by liquid chromatography tandem mass spectrometry
AbstractEstrogens circulate at concentrations less than 20pg/mL in men and postmenopausal women, presenting analytical challenges. Quantitation by immunoassay is unreliable at these low concentrations. Liquid chromatography tandem mass spectrometry (LC–MS/MS) offers greater specificity and sometimes greater sensitivity, but ionization of estrogens is inefficient. Introduction of charged moieties may enhance ionization, but many such derivatives of estrogens generate non-specific product ions originating from the “reagent” group. Therefore an approach generating derivatives with product ions specific to individual estrogens was sought.Estrogens were extracted from human plasma and serum using solid phase extraction and derivatized using 2-fluoro-1-methylpyridinium-p-toluenesulfonate (FMP-TS). Electrospray in positive mode with multiple reaction monitoring using a QTrap 5500 mass spectrometer was used to quantify “FMP” derivatives of estrogens, following LC separation.Transitions for the FMP derivatives of estrone (E1) and estradiol (E2) were compound specific (m/z 362→238 and m/z 364→128, respectively). The limits of detection and quantitation were 0.2pg on-column and the method was linear from 1–400pg/sample. Measures of intra- and inter-assay variability, precision and accuracy were acceptable (<20%). The derivatives were stable over 24h at 10°C (7–9% degradation). Using this approach, E1 and E2, respectively were detected in human plasma and serum: pre-menopausal female serum (0.5mL) 135–473, 193–722pmol/L; male plasma (1mL) 25–111, 60–180pmol/L and post-menopausal female plasma (2mL), 22–78, 29–50pmol/L.Thus FMP derivatization, in conjunction with LC–MS/MS, is suitable for quantitative analysis of estrogens in low abundance in plasma and serum, offering advantages in specificity over immunoassay and existing MS techniques
Local retinoic acid signaling directs emergence of the extraocular muscle functional unit
Coordinated development of muscles, tendons, and their attachment sites ensures emergence of functional musculoskeletal units that are adapted to diverse anatomical demands among different species. How these different tissues are patterned and functionally assembled during embryogenesis is poorly understood. Here, we investigated the morphogenesis of extraocular muscles (EOMs), an evolutionary conserved cranial muscle group that is crucial for the coordinated movement of the eyeballs and for visual acuity. By means of lineage analysis, we redefined the cellular origins of periocular connective tissues interacting with the EOMs, which do not arise exclusively from neural crest mesenchyme as previously thought. Using 3D imaging approaches, we established an integrative blueprint for the EOM functional unit. By doing so, we identified a developmental time window in which individual EOMs emerge from a unique muscle anlage and establish insertions in the sclera, which sets these muscles apart from classical muscle-to-bone type of insertions. Further, we demonstrate that the eyeballs are a source of diffusible all-trans retinoic acid (ATRA) that allow their targeting by the EOMs in a temporal and dose-dependent manner. Using genetically modified mice and inhibitor treatments, we find that endogenous local variations in the concentration of retinoids contribute to the establishment of tendon condensations and attachment sites that precede the initiation of muscle patterning. Collectively, our results highlight how global and site-specific programs are deployed for the assembly of muscle functional units with precise definition of muscle shapes and topographical wiring of their tendon attachments
Conference of Microelectronic Research 1990
https://scholarworks.rit.edu/meec_archive/1003/thumbnail.jp
- …