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1671篇 您的检索式:作者名="Ryan P"
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1高龄对男性生育力的影响显示文摘在过去的几十年里,现代社会的压力和期望使得育龄夫妇生育年龄总体推迟。已知女性在临近40岁时卵母细胞的产生将会明显减少,而高龄对男性精子生成能力的影响还知之甚少。男性生育年龄无明确限制,因而高龄对男性生育能力的影响还不完全清楚。本文将就目前已知的高龄对男性精子质量、生育能力和子代健康的影响进行综述,希望能在医生就男性推迟生育及高龄相关的风险咨询时起到一定的指导作用。Jason R Kovac Josephine Addai Ryan P Smith Robert M Coward Dolores J Lamb Larry I Lipshultz 2013Asian Journal of Andrology2013,15,6:12
2Men with a complete absence of normal sperm morphology exhibit high rates of success without assisted reproduction显示文摘在里面结合不孕, 0% 正常形式(NF ) 的反常严格的形态学是一个标准很快继续到在 vitro 授精(IVF ) 。自从没有数据,当前存在,我们与 0% NF 为人调查了结果没有帮助繁殖技术(艺术) 的使用,决定繁殖成功。有 0% NF 的 24 个人的一个队被识别(2010-2013 ) 随机与 ≥ 与 27 选择了人;是的 4% NF 控制。耐心的图表与联系并且管理同意的一块机构的评论板(IRB ) 的人一起被考察查明结果的电话问询表。在 2.5 年的一中部的后续时间以后,有 0% NF 的 29.2% 人没为他们的第一怀孕要求艺术(控制 =55.6% , P ≤0.05 ) 。当所有怀孕一起被分析时,有 0% NF 的人完成了 75% 没要求 IVF 的二十怀孕(控制 = 三十怀孕;76.7% 没要求 IVF ) 。人和女搭挡的平均年龄在有 0% NF 和 ≥ 的人之间是类似的; 4% NF。所有人有正常刺激滤泡的荷尔蒙(FSH ) ,睾丸激素,催乳激素,性别荷尔蒙绑定血球素(SHBG ) ,和 estradiol。尽管,当第一怀孕是一个自然概念(NC ) 时,全球精液参数在有 0% NF 的人是更坏的,有 0% NF (n = 7/7 ) 的人的 100% 并且 37.5% 控制(n = 3/8 ) 继续了经由 NC 有随后的怀孕。没有 IVF,有 0% NF 的人与 55.6% 控制相比在 29.2% 盒子中怀孕了。严格的形态学不应该被用来预言授精,怀孕,或实时出生潜力。在有 0% NF 的人,其他的形式应该被认为 IVF 以前立即。Jason R Kovac Ryan P Smith Miguel Cajipe Dolores J Lamb Larry I Lipshultz 2017Asian Journal of Andrology2017,19,1:7
3Spectral selectivity in infrared thermal detection显示文摘A review is made of the physics and technology of spectrally selective thermal detectors,especially those operating at non-cryogenic temperatures.The background radiation noise fluctuations are rederived for arbitrary spectral characteristics.Infrared absorption due to phonons and free carriers is discussed followed by a review of published works on artificial infrared absorption materials such as patterned grids,nanoparticles,plasmonic structures,metamaterials and others.Subsequently,the literature of the spectral characteristics of broadband thermal detectors and spectrally selective thermal detectors is reviewed.Finally,the authors speculate on the directions that future research and development in the area will take regarding architectures,sensitivity and spectral characteristics.Joseph J Talghader Anand S Gawarikar Ryan P Shea 2012Light(Science & Applications)2012,1,1:6
4Experimental and modeling study of de novo formation of PCDD/PCDF on MSW fly ash显示文摘polychlorinateddibenzo-p-dioxins ( PCDD )和 polychlorinated dibenzo呋喃( PCDF )的形成上的硫二氧化物( SO2 )的效果在模仿的浪费燃烧 conditions.A chlorinationmodel basedon 下面在anentrained流动反应堆( EFR )被学习了有条件的概率被采用评估 PCDD andPCDFs.Results revealedthat 的相当或相同事物模式 SO2 的存在尽管 SO2suppressed PCDD/F formation.The 预言模型 ofPCDF 显示出好 ag 。LI Xiao-dong ZHANG Ji YAN Jian-hua CEN Ke-fa RYAN Shawn P GULLETT Brian K LEE Chunwai 2007Journal of Environmental Sciences2007,19,1:6
5Vasectomy reversal: a clinical update显示文摘输精管切除术是一只保险箱,避孕的有效方法由 42-60 使用世界范围的百万个人。近似人的 3%-6% 由于一个孩子或离婚和再婚的死亡为输精管切除术颠倒抉择,处于金融状况变化,在一样的婚姻以内为更多的孩子需要,或伤害症候群减轻畏惧的 postvasectomy。不同于输精管切除术,输精管切除术颠倒是仅仅由少数泌尿科医师被执行并且自从它没被保险通常盖住,把更大的金融紧张放在病人上的一个更技术上挑战性的过程。自从操作显微镜在 1970 年代变得可得到,对这个过程的兴趣增加了,它因而导致了跟随过程的改进明显和怀孕率。在这临床的更改,我们讨论耐心的评估,可以影响颠倒成功率的变量,在选择执行 vasovasostomy 对 vasoepididymostomy 考虑的因素,和减轻 postvasectomy 疼痛症候群的输精管切除术颠倒的实用性。我们也为出现在最近的年里帮助这个手术的成功的输精管切除术颠倒和另外的新奇技术和乐器学考察机器人学的使用。Abhishek P Patel Ryan P Smith 2016Asian Journal of Andrology2016,18,3:3
6Metabolite profile comparisons between ascending and descending colon tissue in healthy adults显示文摘BACKGROUND Obesity is a risk factor for colorectal cancer,yet metabolic distinctions between healthy right and left colon tissue,before cancer is diagnosed,remains largely unknown.This study compared right-ascending and left-descending colon tissue metabolomes to identify differences from the stool metabolome in normal weight,overweight,and obese adults.AIM To examine right and left colon tissue metabolites according to body mass index that may serve as mechanistic targets for interventions and biomarkers for colon cancer risk.METHODS Global,non-targeted metabolomics was applied to assess right-ascending and left-descending colon tissue collected from healthy adults undergoing screening colonoscopies to test the hypothesis that BMI differentially impacts colon tissue metabolite profiles.The colon tissue and stool metabolome of healthy adults(n=24)was analyzed for metabolite signatures and metabolic pathway networks implicated in progression of colorectal cancer.RESULTS Ascending and descending colon contained 504 host,food,and microbiotaderived metabolites from normal weight,overweight and obese adults grouped according to body mass index.Amino acids,lipids,and nucleotides were among the chemical types that further differentiated from the stool metabolite profiles.Normal weight adults had 46 significantly different metabolites between ascending and descending colon tissue locations,whereas there were 37 metabolite differences in overweight and 28 metabolite differences for obese adults(P<0.05).Obese adults had trimethylamine N-oxide,endocannabinoids and monoacylglycerols with different relative abundances identified between ascending and descending colon.Primary and secondary bile acids,vitamins,and fatty acids also showed marked relative abundance differences in colon tissue from overweight/obese adults.CONCLUSION There were metabolite profile differences between right-ascending and leftdescending colon tissue in healthy adults.Colon lipids and other metabolites in obese and overweight adults were distinguished from normal weight participants and associated with gut inflammation,nutrient absorption,and products of microbiota metabolism.Bridget A Baxter Kristopher D Parker Michael J Nosler Sangeeta Rao Rebecca Craig Catherine Seiler Elizabeth P Ryan 2020World Journal of Gastroenterology2020,26,3:2
7Percutaneous transluminal angioplasty balloons for endoscopic ultrasound-guided pancreatic duct interventions显示文摘BACKGROUND Endoscopic ultrasound(EUS)-guided main pancreatic duct(PD)access may be used when conventional endoscopic retrograde cholangiopancreatography(ERCP)techniques fail.The use of a percutaneous transluminal angioplasty balloon(PTAB),originally developed for vascular interventions,can be used to facilitate transmural(e.g.,transgastric)PD access and to dilate high-grade pancreatic strictures.AIM To describe the technique,efficacy,and safety of PTABs for EUS-guided PD interventions.METHODS Patients who underwent EUS with use of a PTAB from March 2011 to August 2021 were retrospectively identified from a tertiary care medical center supply database.PTABs included 3-4 French angioplasty catheters with 3-4 mm balloons designed to use over a 0.018-inch guidewire.The primary outcome was technical success.Secondary outcomes included incidence of adverse events(AEs)and need for early reintervention.RESULTS A total of 23 patients were identified(48%female,mean age 55.8 years).Chronic pancreatitis was the underlying etiology in 13(56.5%)patients,surgically altered anatomy(SAA)with stricture in 7(30.4%),and SAA with post-operative leak in 3(13.0%).Technical success was achieved in 20(87%)cases.Overall AE rate was 26%(n=6).All AEs were mild and included 1 pancreatic duct leak,2 cases of post-procedure pancreatitis,and 3 admissions for post-procedural pain.No patients required early re-intervention.CONCLUSION EUS-guided use of PTABs for PD access and/or stricture management is feasible with an acceptable safety profile and can be considered in patients when conventional ERCP cannulation fails.Jad P AbiMansour Barham K Abu Dayyeh Michael J Levy Andrew C Storm John A Martin Bret T Petersen Ryan J Law Mark D Topazian Vinay Chandrasekhara 2022World Journal of Gastrointestinal Endoscopy2022,14,8:2
8Implantation potential and fetal viability of mouse embryos cultured in media supplemented with platelet activating factor 显示文摘Ryan J P Spinks N R O'Neill C 1990J Reprod Fertil1990,89,:2
9Hypoxia-inducible factor-1a restricts the anabolic actions of parathyroid hormone显示文摘The hypoxia inducible factors(Hifs) are evolutionarily conserved transcriptional factors that control homeostatic responses to low oxygen. In developing bone, Hif-1 generated signals induce angiogenesis necessary for osteoblast specification, but in mature bone, loss of Hif-1 in osteoblasts resulted in a more rapid accumulation of bone. These findings suggested that Hif-1 exerts distinct developmental functions and acts as a negative regulator of bone formation. To investigate the function of Hif-1a in osteoanabolic signaling, we assessed the effect of Hif-1a loss-of-function on bone formation in response to intermittent parathyroid hormone(PTH). Mice lacking Hif-1a in osteoblasts and osteocytes form more bone in response to PTH, likely through a larger increase in osteoblast activity and increased sensitivity to the hormone. Consistent with this effect, exposure of primary mouse osteoblasts to PTH resulted in the rapid induction of Hif-1a protein levels via a post-transcriptional mechanism. The enhanced anabolic response appears to result from the removal of Hif-1a-mediated suppression of b-catenin transcriptional activity. Together, these data indicate that Hif-1a functions in the mature skeleton to restrict osteoanabolic signaling. The availability of pharmacological agents that reduce Hif-1a function suggests the value in further exploration of this pathway to optimize the therapeutic benefits of PTH.Julie L Frey David P Stonko Marie-Claude Faugere Ryan C Riddle 2014Bone Research2014,2,1:2
10Critical design issues for airbreathing hypersonic waverider missiles 显示文摘Ryan P Starkey M Lewis J 2001Journal of Spacecraft and Rockets2001,38,4:1
11Relaxin increases secretion of matrix metalloproteinase-2 and matrix metalloproteinase-9 during uterine and cervical growth and remodeling in the pig 显示文摘LENHART J A RYAN P L OHLETH K M 2001Endocrinology2001,142,9:1
12The receptor binding domain of pseudorabies virus glycoprotein gC is composed of multiple discrete units that are functionally redundant显示文摘Flynn S Ryan P 1996Tial Journal of Virology1996,70,3:1
13MMP-2 and MMP-9 secretion by rpe is stimulated by angiogenic molecules found in choroidal neovascular membranes 显示文摘Hoffmann S He S Ehren M Ryan S J Wiedemann P Hinton DR 2006Retina2006,26,4:1
14Evidence that decomposition rates of organic carbon in mineral soil do not vary with temperature显示文摘 Ryan M G 2000Nature2000,404,:1
15Identification and estimation of discrete games of complete information 显示文摘P Bajari H Hong and S Ryan 2008NBER Working paper2008,,:1
16Low-gain integral control of continuous-time linear systems subject to input and output nonlinearities显示文摘FLIEGNER T LOGEMANN H RYAN E P 2003Automatica2003,39,:1
17Effect of yucca schidigera and its mechanism of action in reducing ammonia leverls in a biologically filtered environment显示文摘Ryan J P Leek B F 1993J Anim Sci1993,71,1:1
18ADAM-17 expmssion in breast cancer correlates with variables of tumor progression显示文摘MCGOWAN P M RYAN B M HILL A D 2007Clin Cancer Res2007,13,8:1
19Clinical overview ofalgal-docosahexaenoic acid: effects on triglyceride levels and othercardiovascular risk factors 显示文摘Ryan A S Keske M A Hoffman J P 2009American Journal of Therapeutics2009,16,2:1
20The laser drilling of multi-layer aerospace material systems显示文摘A Corcoran L Sexton B Seaman P Ryan G Byrne 2002Journal of Materials Processing Tech2002,,1:1
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