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Frequency of monthly Ejaculation at Sexual intercourse, DNA Fragmentation index and Fertilization Rate among Sperm Donors and Fertility-Challenged men in Sub-Saharan Africa: Paper 1

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Open Journal of Urology 2019年第11期9卷 181-194页

作者： Abayomi B. Ajayi Bamgboye m. Afolabi Victor D. Ajayi ifeoluwa O. Oyetunji Adedamilola Atiba Seun Saanu Ayodeji T. Adeoye Joy Ehichioya ibukun i. Ayelehin Nordica Fertility Center Lagos Nigeria Health Environment and Development Foundation Lagos Nigeria

introduction: in humans, the ideal ejaculation frequency depends on age, exercise and sexual potential. Natural ejaculation frequency balances the testosterone levels in the body. materials and methods: Semi-structured questionnaire was used to collect information from subjects. Semen samples were collected from sperm donors and sub-fertile men who presented for infertility challenges. Processing and analysis of semen samples were done according to World Health Organization guidelines. Sperm DNA fragmentation was evaluated using the Halosperm®?kit. Results: A total of 114 subjects, including 19 sperm donors and 95 sub-fertile males were studied. There was a significant difference (t =?−5.96, P-value = 0.00001) in the mean [±sd] age of sperm donors (30.8 [8.1]) and that of sub-fertile men (42.3 [76]). There was a significant difference (t=?−4.10, P-value = 0.0005) in the mean monthly ejaculation during sexual intercourse (mESi) among sperm donors with DNA fragmentation index −2.20, P-value = 0.02) in mESi among sub-fertile men aged ≥40 years (8.9 [4.6]) than among those aged −0.67, SE = 0.28, t = −2.40, P-value = 0.02, 95% Ci: −1.24,?−0.10). Conclusion: in men mESi did not worsen the DFi. A higher number of professionals such as doctors, lawyers and engineers, reported lower monthly frequency of sexual ejaculations compared to entrepreneurs. Entrepreneurs and non-smokers had the highest frequencies of mESi.

关键词： monthly Sexual Ejaculation Rate DNA Fragmentation index male infertility Age Group Body mass index Social Habits Black Africans

Experimental and Quantum Studies on Adsorption and Corrosion inhibition Effect on mild Steel in Hydrochloric Acid by Thiophene Derivatives

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Acta metallurgica Sinica(English Letters) 2014年第1期27卷 37-46页

作者： m.Yadav Debasis Behera R.R.Sinha P.N.Yadav Department of Applied Chemistry Indian School of Mines Department of Physics Post Graduate College

The inhibition effect of synthesized diethyl 3,4-bis（4-methoxybenzylideneamino） thieno[2,3-b] thiophene-2,5- dicarboxylate （inh i） and diethyl 3,4-bis（benzylideneamino） thieno[2,3-b] thiophene-2,5-dicarboxylate （inh ii）, on cor- rosion of mild steel in 15% HC1 solution was investigated using weight loss measurements, electrochemical polarization, and electrochemical impedance spectroscopy techniques. The experimental results show that the inhibition efficiency of studied inhibitors increased with the increase of inhibitors concentration but decreased with the increase of temperature. Corrosion inhibition efficiencies of 94.5% and 92.1% were obtained with 250 ppm of inh i and inh ii at 303 K, respectively. The potentiodynamic polarization measurements indicate that the studied inhibitors act as mixed inhibitor. The thermodynamic parameters of the corrosion and adsorption processes were calculated and evaluated. The adsorption of these inhibitors was found to obey Langmuir adsorption isotherm. Scanning electron microscopy was used to characterize the surface morphology of the mild steel specimens in presence and absence of inhibitors. The mechanism of the inhibition process was discussed in the light of the chemical structure and quantum-chemical calculations of the investigated inhibitors.

关键词： mild steel Corrosion Polarization EiS Acid inhibition

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初级趣味英语

Quasi-elastic scattering of 17F on 12C target at 60 meV

1991年

作者： i.A.·理查兹(i.A. Richards) 克里斯订.m.·吉布森(Christine.m. Gibson)

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Quasi-elastic scattering of 17F on 12C target at 60 MeV

小麦育种中杂交亲本选配理论与方法的研究 Ⅰ.标准差距离分组法预测杂种优势

第十四届全国核结构大会暨第十次全国核结构专题讨论会

作者： S.Kubono H.Yamaguchi S.Hayakawa D.N.Binh Y.K.Kwon N.iwasa m.mazzocco m.La Commara Y.K.Kwon N.iwasa a di Padova and istituto Nazionale di Fisica Nucleare-Sezione di Padova,via F.marzolo 8,i-35131 Padova,italy a diapoli,via Cinthia,i-80126 Napoli,italy m.Romoli a di Padova and istituto Nazionale di Fisica Nucleare-Sezione di Padova,via F.marzolo 8,i-35131 Padova,italy Center of Nuclear Study University of TokyoJapan Department of Physics Chung-Ang UniversitySeoul 156-756South Korea istituto Nazionale di Fisica Nucleare-Sezione di Napoli via CinthiaI-80126 NapoliItaly

Quasi-elastic scattering angular distribution of the exotic nucleus F on a C target at 60 meV was *** experimental data have been analyzed by means of the optical model and continuum discretized coupled-channels(CDCC)...

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北京农业大学学报 1990年第1期16卷 19-25页

作者：张爱民黄铁城张树榛 Ch.i.Kling 北京农业大学联邦德国霍恩海姆大学

本文提出了标准差距离分组法并以中国和联邦德国4个不同生态环境,5个不同年份的5套试验资料研究用标准差距离分组法进行小麦杂种优势预测。结果表明:G:组(D^2±1/2s)出现强优势组合最多,为43个,平均杂种优势最高,为60.4%;强优势组合出... 详细信息

本文提出了标准差距离分组法并以中国和联邦德国4个不同生态环境,5个不同年份的5套试验资料研究用标准差距离分组法进行小麦杂种优势预测。结果表明:G:组(D^2±1/2s)出现强优势组合最多,为43个,平均杂种优势最高,为60.4%;强优势组合出现的频率也最高,为57.3%。因而可以选择遗传距离(D^2)大小为(m±1/28)的亲本进行杂交,这样有较大的把握和机会获得强优势组合。为应用遗传距离预测小麦杂种优势提供了一个量化指标。

关键词：小麦杂种优势遗传距离

Changes in physical activity,sedentary behavior,and self-reported cognitive function in cancer survivors before and during the COViD-19 pandemic:A cross-sectional study

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Journal of Sport and Health Science 2023年第6期12卷 653-663页

作者： Linda Trinh Allyson Tabaczynski Denise Bastas Alyssa R.Neville m.Lauren Voss Alexis Whitehorn Faculty of Kinesiology&Physical Education University of TorontoTorontoOT M5S 2W6Canada

Background Physical activity(PA)and reductions in sedentary behavior(SED)may mitigate cancer-related cognitive *** purpose of this study was to examine(a)the associations between changes in PA,SED,and cognitive function in cancer survivors before and during the coronavirus disease 2019(COViD-19)pandemic;and(b)clinical subgroups that moderate this *** A cross-sectional survey was administered online to adult cancer survivors globally between July and November of *** was a secondary analysis of a cross-sectional survey examining changes in self-reported PA and quality of life in cancer survivors before and during the COViD-19 ***-reported Questionnaires assessed moderate-to-vigorous PA(mVPA)using the modified Godin Leisure Time Exercise Questionnaire,cognitive function using the Functional Assessment of Cancer Therapy-Cognitive Function(FACT-Cog)scale,and SED using the Domain-specific Sitting Time *** survivors were classified into no change in behavior,desirable change(i.e.,increase mVPA to meet PA guidelines or decrease SED by≥60 min/day),and undesirable change(i.e.,decrease mVPA tomin/week or increase SED by≥60 min/day).Analysis of covariance examined differences in FACT-Cog scores across the activity change *** contrasts compared differences in FACT-Cog scores between cancer survivors with(a)no meaningful change *** change,and(b)a desirable change *** undesirable *** There were no significant differences in FACT-Cog scores across activity-change categories in the full sample of cancer survivors(n=371;age=48.6±15.3 years(mean±SD)).However,cancer survivors who were diagnosed≥5 years ago(t(160)=–2.15,p=0.03)or who received treatment≥5 years ago(t(102)=–2.23,p=0.03)and who had a desirable change in activity reported better perceived cognitive abilities than those who had an undesirable *** PA promotion efforts should consider reducing SED in addition to mainta

关键词： Cancer-related cognitive impairment Cancer survivorship Exercise Sedentary time

From chip-in-a-lab to lab-on-a-chip:a portable Coulter counter using a modular platform

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microsystems & Nanoengineering 2018年第1期4卷 57-64页

作者： Stefan Dekker Pelin Kubra isgor Tobias Feijten Loes i.Segerink mathieu Odijk BiOS Lab on Chip Group MESA+Institute for NanotechnologyUniversity of Twente7500 AE EnschedeNetherlands

The field of microfluidics has been struggling to obtain widespread market *** order to overcome this struggle,a standardized and modular platform is introduced and *** providing easy-to-fabricate modular building blocks which are compatible with mass manufacturing,we decrease the gap from *** standardized blocks are used in combination with an application-specific fluidic circuit *** this board,electrical and fluidic connections are demonstrated by implementing an alternating current Coulter *** multipurpose building block is reusable in many *** this study,it identifies and counts 6 and 11μm *** system is kept in a credit card-sized footprint,as a result of in-house-developed electronics and standardized building *** believe that this easy-to-fabricate,credit card-sized,modular,and standardized prototype brings us closer to clinical and veterinary applications,because it provides an essential stepping stone to fully integrated point-of-care devices.

关键词： sized portable closer

冠状动脉壁3 T mRi时间分辨采集相位敏感双重反转恢复(TRAPD)技术:冠状动脉疾病危险因素病人中的初步应用结果

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国际医学放射学杂志 2013年第1期 71-72页

作者： K.Z.Abd-Elmoniem A.m.Gharib R.i.Pettigrew 程悦 Biomedical and metabolic imaging Branch National Institute of Diabetes and Digestive and Kidney DiseasesNational Institutes of Health10 Center DrBldg 10Room 3-5340BethesdaMD 20892

目的开发时间分辨采集相位敏感双重反转恢复(TRAPD)技术进行冠状动脉壁的mR成像,研究其与单帧影像相比显示冠状动脉壁的成功率,并评价健康志愿者和有冠状动脉疾病(CAD)危险因素者的冠状动脉壁厚度。材料与方法研究获得单位伦理委员会的... 详细信息

目的开发时间分辨采集相位敏感双重反转恢复(TRAPD)技术进行冠状动脉壁的mR成像,研究其与单帧影像相比显示冠状动脉壁的成功率,并评价健康志愿者和有冠状动脉疾病(CAD)危险因素者的冠状动脉壁厚度。材料与方法研究获得单位伦理委员会的批准,符合HiPAA要求,并得到38名受试者(12名健康志愿者,另26名存在至少一项CAD危险因素)的知情同意书。开发TRAPD冠状动脉壁成像技术,并在流动体模上进行验证。所有受试者采集3～5个电影期相的时间分辨冠状动脉壁影像。对TRAPD技术与常规单层影像的血管壁测量进行定性和定量的比较。同时评价测量的可重复性。所有比较均进行统计学分析。结果在流动体模和所有受试者中,TRAPD技术的电影影像在保持管腔内低信号情况下成功地提高了管壁的对比。使用3～5次采集提高了成像的成功率,将至少一幅好或优秀质量影像的比率从单层采集的76%提到至TRAPD序列的95%。健康志愿者和存在CAD危险因素的受试者间的血管壁厚度,在采用TRAPD序列(分别为1.07mm和1.46mm,增加36%)和单帧双重反转恢复序列(分别为1.24mm和1.55mm,增加25%)时的差异均有统计学意义(P<0.05)。观察者内、观察者间和不同检查方式间血管壁厚度测量的一致性分别为0.98、0.97和0.92。结论冠状动脉的TRAPD技术通过增加好至优秀质量影像的成功率并获得垂直于血管长轴的切面像,从而可以改善血管壁的显示并进行定量评价。这也使得健康志愿者和存在CAD危险因素的受试者间的血管壁厚度测量出现更明显的差异。

关键词：反转恢复 TRAPD T mRi 危险因素危险隐患冠状动脉疾病时间分辨相位

A thin Si nanowire network anode for high volumetric capacity and long-life lithium-ion batteries

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Journal of Energy Chemistry 2023年第6期81卷 20-27,I0002页

作者： ibrahim Saana Amiinu Sumair imtiaz Hugh Geaney Tadhg Kennedy Nilotpal Kapuria Shalini Singh Kevin m Ryan Bernal institute University of LimerickLimerick V94 T9PXIreland Department of Chemical Sciences University of LimerickLimerick V94 T9PXIreland

Silicon nanowires(Si NWs)have been widely researched as the best alternative to graphite anodes for the next-generation of high-performance lithium-ion batteries(LiBs)owing to their high capacity and low discharge ***,growing binder-free Si NW anodes with adequate mass loading and stable capacity is severely limited by the low surface area of planar current collectors(CCs),and is particularly challenging to achieve on standard pure-Cu substrates due to the ubiquitous formation of Li+inactive silicide ***,the growth of densely-interwoven in-seeded Si NWs is facilitated by a thin-film of copper-silicide(CS)network in situ grown on a Cu-foil,allowing for a thin active NW layer(m thick)and high areal loading(≈1.04 mg/cm^(2))binder-free electrode *** electrode exhibits an average Coulombic efficiency(CE)of>99.6%and stable performance for>900 cycles with≈88.7%capacity *** significantly,it delivers a volumetric capacity of≈1086.1 m A h/cm^(3)at *** full-cell versus lithium manganese oxide(LmO)cathode delivers a capacity of≈1177.1 m A h/g at 1C with a stable rate *** electrode architecture represents significant advances toward the development of binder-free Si NW electrodes for LiB application.

关键词： Si NW anode Silicidation LmO cathode Amorphous ligaments Volumetric capacity Lithium-ion batteries