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https://www.readbyqxmd.com/read/30312951/enhanced-adsorption-of-arsenite-from-aqueous-solution-by-an-iron-doped-electrospun-chitosan-nanofiber-mat-preparation-characterization-and-performance
#1
Ling-Li Min, Li-Ming Yang, Ren-Xiang Wu, Lu-Bin Zhong, Zhi-Hua Yuan, Yu-Ming Zheng
A novel iron-doped chitosan electrospun nanofiber mat (Fe@CTS ENM) was synthesized, which was proven to be effective for the removal of arsenite (As(III)) from water at neutral pH condition. The physiochemical properties and adsorption mechanism were explored by SEM-EDS and X-ray photoelectron spectroscopy (XPS). Batch adsorption experiments were carried out to evaluate the As(III) adsorption performance of the Fe@CTS ENM with various process parameters, such as adsorbent dose, solution pH, initial As(III) concentration, contact time, ionic strength, coexisting anions, and natural organic matter...
September 24, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/30290868/study-of-ciprofloxacin-removal-by-biochar-obtained-from-used-tea-leaves
#2
Jie Li, Guangwei Yu, Lanjia Pan, Chunxing Li, Futian You, Shengyu Xie, Yin Wang, Jianli Ma, Xiaofu Shang
In this study, used tea leaves (UTLs) were pyrolyzed to obtain used tea-leaf biochar (UTC), and then the UTC was used as an adsorbent to remove ciprofloxacin (CIP) from aqueous solutions. Batch experiments were conducted to investigate the CIP adsorption performance and mechanism. The results showed that the CIP-adsorbing ability first increased and then declined as the UTC pyrolysis temperature increased. The UTC obtained at 450°C presented excellent CIP-absorbing ability at pH6 and 40°C. The maximum monolayer adsorption capacity was 238...
November 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/30275396/influence-of-dielectric-barrier-discharge-treatment-on-surface-structure-of-polyoxymethylene-fiber-and-interfacial-interaction-with-cement
#3
Wei Zhang, Xiao Xu, Fayun Wei, Xueshu Zou, Yu Zhang
Polyoxymethylene (POM) fiber was treated with atmospheric dielectric barrier discharge (DBD) plasma to enhance the surface activity of the fiber and interfacial interaction with cement. The physical and chemical properties of samples with different DBD plasma treatment durations were tested and analyzed. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) revealed that the surface roughness of the sample increased significantly as a result of the DBD plasma treatment. Fourier transform infrared spectrophotometer (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis showed that a large number of ⁻COH and ⁻COOH groups were formed on the surface of the sample after DBD plasma treatment...
October 1, 2018: Materials
https://www.readbyqxmd.com/read/30274376/can-photoplethysmography-replace-arterial-blood-pressure-in-the-assessment-of-blood-pressure
#4
Gloria Martínez, Newton Howard, Derek Abbott, Kenneth Lim, Rabab Ward, Mohamed Elgendi
Arterial Blood Pressure (ABP) and photoplethysmography (PPG) are both useful techniques to monitor cardiovascular status. Though ABP monitoring is more widely employed, this procedure of signal acquisition whether done invasively or non-invasively may cause inconvenience and discomfort to the patients. PPG, however, is simple, noninvasive, and can be used for continuous measurement. This paper focuses on analyzing the similarities in time and frequency domains between ABP and PPG signals for normotensive, prehypertensive and hypertensive subjects and the feasibility of the classification of subjects considering the results of the analysis performed...
September 30, 2018: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/30270743/aberrant-dna-methylation-of-igf2-h19-locus-in-human-fetus-and-in-spermatozoa-from-assisted-reproductive-technologies
#5
Hangying Lou, Fang Le, Minhao Hu, Xinyun Yang, Lejun Li, Liya Wang, Ning Wang, Huijuan Gao, Fan Jin
Given the higher risk of developing imprinting disorders in assisted reproductive technology (ART)-conceived children, we hypothesized that ART may affect DNA methylation of the insulin-like growth factor 2 (IGF2), H19, small nuclear ribonucleoprotein polypeptide N (SNRPN) differentially methylated regions (DMRs) at the fetal stage, which in turn may be associated with sperm abnormalities. A total of 4 patient groups were recruited, namely, multifetal reduction following in vitro fertilization (IVF)/ intracytoplasmic sperm injection (ICSI; n = 56), multifetal reduction following controlled ovarian hyperstimulation (COH; n = 42), male patients with normal semen parameters denoted as normozoospermia group (NZ) for IVF (n = 36), and male patients presenting with asthenozoospermia (OAZ) for ICSI (n = 38)...
October 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/30264366/beyond-subjective-judgments-predicting-evaluations-of-creative-writing-from-computational-linguistic-features
#6
Claire M Zedelius, Caitlin Mills, Jonathan W Schooler
The question of how to evaluate creativity in the context of creative writing has been a subject of ongoing discussion. A key question is whether something as elusive as creativity can be evaluated in a systematic way that goes beyond subjective judgments. To answer this question, we tested whether human evaluations of the creativity of short stories can be predicted by: (1) established measures of creativity and (2) computerized linguistic analyses of the stories. We conducted two studies, in which college students (with and without interest and experience in creative writing) wrote short stories based on a writing prompt...
September 27, 2018: Behavior Research Methods
https://www.readbyqxmd.com/read/30256988/the-predictive-validity-of-physical-performance-measures-in-determining-markers-of-preclinical-disability-in-community-dwelling-middle-aged-and-older-adults-a-systematic-review
#7
Ellen J Cavanaugh, Jenna Richardson, Christine A McCallum, Mark Wilhelm
Background: Identification of preclinical disability in middle-aged and older adults may allow early identification of and treatment for functional mobility deficits. Purpose: This study aimed to determine which physical performance measures (PPMs) were effective in identifying preclinical disability in individuals at risk for future disability. Data Sources: CINHAL, PubMed, Scopus, and Web of Science were searched from creation of the databases to September 2017 using key words...
September 25, 2018: Physical Therapy
https://www.readbyqxmd.com/read/30256632/bioinspired-metal-organic-framework-for-trace-co-2-capture
#8
Caitlin E Bien, Kai K Chen, Szu-Chia Chien, Benjamin R Reiner, Li-Chiang Lin, Casey R Wade, W S Winston Ho
A Zn benzotriazolate metal-organic framework (MOF), [Zn(ZnO2 CCH3 )4 (bibta)3 ] (1, bibta2- = 5,5'-bibenzotriazolate), has been subjected to a mild CH3 CO2 - /HCO3 - ligand exchange procedure followed by thermal activation to generate nucleophilic Zn-OH groups that resemble the active site of α-carbonic anhydrase. The postsynthetically modified MOF, [Zn(ZnOH)4 (bibta)3 ] (2*), exhibits excellent performance for trace CO2 capture and can be regenerated at mild temperatures. IR spectroscopic data and density functional theory (DFT) calculations reveal that intercluster hydrogen bonding interactions augment a Zn-OH/Zn-O2 COH fixation mechanism...
October 2, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/30238809/arterial-stiffness-during-controlled-ovarian-hyperstimulation-and-early-pregnancy-in-women-exposed-to-assisted-reproduction
#9
Emma von Wowern, Pia Saldeen, Per Olofsson
INTRODUCTION: Female sex hormones have vasorelaxing effects in non-pregnant and pregnant women. We aimed to investigate the effect of controlled ovarian hyperstimulation (COH) for in vitro fertilization (IVF), and early pregnancy, on arterial stiffness as assessed by digital pulse wave analysis (DPA), hypothesizing reduced arterial stiffness as an effect of increased estrogen levels. MATERIAL AND METHODS: A total of 68 women undergoing IVF were examined with DPA before conception and during IVF treatment with COH and embryo transfer (ET), and in gestational week seven in 19 women who became pregnant...
September 21, 2018: Hypertension in Pregnancy
https://www.readbyqxmd.com/read/30196153/raman-optical-activity-and-raman-spectroscopy-of-carbohydrates-in-solution
#10
Monika Dudek, Grzegorz Zajac, Ewelina Szafraniec, Ewelina Wiercigroch, Szymon Tott, Kamilla Malek, Agnieszka Kaczor, Malgorzata Baranska
This comprehensive study on selected 14 carbohydrates in water solution is an extension of previously published one focused only on solid state analysis. Here, Raman spectroscopy was used as a dedicated method for analysis of carbohydrates in solution, both using a normal effect (RS) and its chiral analogue: Raman Optical Activity spectroscopy (ROA). The compounds were selected as biologically important and representative of all groups: monosaccharides, disaccharides, trisaccharides, cyclodextrines and polysaccharides...
August 13, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/30188490/developing-two-culture-of-health-measurement-tools-examining-employers-efforts-to-influence-population-health-inside-and-outside-company-walls
#11
Karen B Kent, Ron Z Goetzel, Enid Chung Roemer, Katherine McCleary, Rachel M Henke, Michael A Head, Raymond Fabius
OBJECTIVE: To develop tools that quantify employers' investment in building cultures of health (COH) - inside and outside company walls. METHODS: Two COH instruments were developed through literature reviews and expert consultation. The first focused on internal culture of health (COH-INT); i.e., programs, policies and attributes of the physical and social environments that support employees' health and well-being. The second focused on external culture of health (COH-EXT); i...
September 4, 2018: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/30170131/effect-of-time-intervals-from-the-end-of-sperm-collection-to-intrauterine-insemination-on-the-pregnancy-rates-in-controlled-ovarian-hyperstimulation-intrauterine-insemination-cycles
#12
Meryem Kuru Pekcan, Demet Kokanalı, Kuntay Kokanalı, Yasemin Taşçı
OBJECTIVE: To analyze the effect of time intervals from the end of sperm collection to IUI on the pregnancy rates in couples who treated by COH-IUI cycles with gonadotropin due to unexplained infertility. METHODS: 556 couples who underwent the first COH-IUI treatment with gonadotopin due to unexplained infertility were included. Semen samples were obtained by masturbation in a private room near the laboratory on the day of insemination. For each semen samples, time between the delivery time to the laboratory and starting time of sperm washing procedure was noted as semen collection to sperm washing (SC-SW) interval, the time between the starting time of sperm washing procedure and insemination time was noted as sperm washing to insemination (SW-IUI) interval and the time between the delivery time to the laboratory and insemination was noted as semen collection to insemination (SC-IUI) interval...
August 29, 2018: Journal of Gynecology Obstetrics and Human Reproduction
https://www.readbyqxmd.com/read/30169895/the-effect-of-unilateral-tubal-block-diagnosed-by-hysterosalpingogram-on-clinical-pregnancy-rate-in-intrauterine-insemination-cycles-systematic-review-meta-analysis
#13
Justin Tan, Samer Tannus, Omur Taskin, Arohumam Kan, Arianne Y Albert, Mohamed A Bedaiwy
BACKGROUND: Fallopian tube occlusion is a common cause of infertility, but the effect of unilateral tubal block (UTB) on pregnancy rates (PR) after controlled ovarian hyperstimulation and intrauterine insemination (COH-IUI) remains controversial. OBJECTIVES: To evaluate PR after COH-IUI among infertile women with proximal and distal UTB diagnosed by hysterosalpingogram (HSG) compared to women with unexplained infertility and bilateral patent tubes. SEARCH STRATEGY: We searched EMBASE, MEDLINE, Google Scholar, Cochrane Library, and PUBMED from inception to January 14th , 2018...
August 31, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/30137360/dosage-of-exogenous-gonadotropins-is-not-associated-with-blastocyst-aneuploidy-or-live-birth-rates-in-pgs-cycles-in-chinese-women
#14
Qianqian Wu, Hongchang Li, Yueting Zhu, Wenjie Jiang, Juanjuan Lu, Daimin Wei, Junhao Yan, Zi-Jiang Chen
STUDY QUESTION: Is the total dose of exogenous gonadotropins associated with blastocyst aneuploidy or live-birth rates in PGS cycles in Chinese women? SUMMARY ANSWER: The total dose of exogenous gonadotropins is not significantly associated with blastocyst aneuploidy or live-birth rates in PGS cycles in Chinese women. WHAT IS KNOWN ALREADY: The administration of gonadotropins in ovarian stimulation leads to supraphysiological steroid concentrations compared with those seen during natural cycles...
October 1, 2018: Human Reproduction
https://www.readbyqxmd.com/read/30129807/levothyroxine-supplementation-on-assisted-reproduction-technology-art-outcomes-in-women-with-subtle-hypothyroidism-a-retrospective-study
#15
Fiore Pelliccione, Andrea Lania, Alessandro Pizzocaro, Luca Cafaro, Luciano Negri, Emanuela Morenghi, Nazarena Betella, Marta Monari, Paolo Emanuele Levi-Setti
The need for treating subclinical hypothyroidism (SCH) in women undergoing assisted reproduction technology (ART) is under debate. Moreover, it is known that controlled ovarian hyperstimulation (COH) protocols may impair the thyroidal axis. Therefore, we evaluated if levothyroxine (L-T4) supplementation in SCH women before undergoing ART positively affects the main reproductive outcomes. We retrospectively analyzed in vitro fertilization (IVF) data of 4147 women submitted to 6545 cycles in a tertiary care IVF Center (January 2009-December 2014)...
August 21, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/30103536/force-time-differences-between-ballistic-and-non-ballistic-half-squats
#16
Timothy J Suchomel, Christopher B Taber, Christopher J Sole, Michael H Stone
The purpose of this study was to examine the force-time differences between concentric-only half-squats (COHS) performed with ballistic (BAL) or non-ballistic (NBAL) intent across a range of loads. Eighteen resistance-trained men performed either BAL or NBAL COHS at 30%, 50%, 70%, and 90% of their one repetition maximum (1RM) COHS. Relative peak force (PF) and relative impulse from 0⁻50 ms (Imp50), 0⁻90 ms (Imp90), 0⁻200 ms (Imp200), and 0⁻250 ms (Imp250) were compared using a series of 2 × 4 (intent × load) repeated measures ANOVAs with Bonferroni post hoc tests...
August 12, 2018: Sports
https://www.readbyqxmd.com/read/30086781/influencing-factors-of-pregnancy-loss-and-survival-probability-of-clinical-pregnancies-conceived-through-assisted-reproductive-technology
#17
Lingmin Hu, Jiangbo Du, Hong Lv, Jing Zhao, Mengxi Chen, Yifeng Wang, Fang Wu, Feng Liu, Xiaojiao Chen, Junqiang Zhang, Hongxia Ma, Guangfu Jin, Hongbing Shen, Li Chen, Xiufeng Ling, Zhibin Hu
BACKGROUND: Pregnancies following assisted reproductive technology (ART) may have elevated potential risk of pregnancy loss (PL) when compared to natural conception. However, rare studies comprehensively analyzed the IVF/ICSI cycle-dependent factors for loss of clinical pregnancy. Therefore, we aimed to determine the ART subgroup-specific risks of PL throughout pregnancy and explore different risk factors for early miscarriage and late miscarriage among pregnancies conceived through ART...
August 7, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/30084973/electroacupuncture-facilitates-implantation-by-enhancing-endometrial-angiogenesis-in-a-rat-model-of-ovarian-hyperstimulation
#18
Wei Chen, Jie Chen, Menghao Xu, Zhiyan Zhong, Qing Zhang, Wei Yang, Guangying Huang
Controlled ovarian hyperstimulation (COH) impairs the synchronized development of endometrium and embryo, resulting in the failure of embryo implantation. Here, we investigated what effects electroacupuncture had on embryo implantation in COH rats. Female rats were randomly assigned to 4 groups: normal (group N), model (group M), electroacupuncture (group EA), and electroacupuncture pretreatment (group PEA). Rats in groups M, EA, PEA were injected with pregnant mare serum gonadotropin and human chorionic gonadotropin to establish the COH model...
August 1, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/30040391/backbone-dehydrogenation-in-pyrrole-based-pincer-ligands
#19
V Mahesh Krishnan, Ian Davis, Tessa M Baker, Daniel J Curran, Hadi D Arman, Michael L Neidig, Aimin Liu, Zachary J Tonzetich
Treatment of both [CoCl( tBu PNP)] and [NiCl( tBu PNP)] ( tBu PNP = anion of 2,5-bis((di- tert-butylphosphino)methyl)pyrrole) with one equivalent of benzoquinone affords the corresponding chloride complexes containing a dehydrogenated PNP ligand, tBu dPNP ( tBu dPNP = anion of 2,5-bis((di- tert-butylphosphino)methylene)-2,5-dihydropyrrole). Dehydrogenation of PNP to dPNP results in minimal change to steric profile of the ligand but has important consequences for the resulting redox potentials of the metal complexes, resulting in the ability to isolate both [CoH( tBu dPNP)] and [CoEt( tBu dPNP)], which are more challenging (hydride) or not possible (ethyl) to prepare with the parent PNP ligand...
August 6, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/30037802/prediction-of-cardiovascular-disease-among-hematopoietic-cell-transplantation-survivors
#20
Saro H Armenian, Dongyun Yang, Jennifer Berano Teh, Liezl C Atencio, Alicia Gonzales, F Lennie Wong, Wendy M Leisenring, Stephen J Forman, Ryotaro Nakamura, Eric J Chow
Cardiovascular disease (CVD) is a leading cause of late morbidity and mortality in hematopoietic cell transplantation (HCT) survivors. HCT-specific CVD risk prediction models are needed to facilitate early screening and prevention. In the current study, patients who underwent HCT at City of Hope (COH) and survived 1-year free of clinically evident CVD (N = 1828) were observed for the development of heart failure (HF) or coronary artery disease (CAD) by 10-years from index date (1 year from HCT). CVD occurred in 135 individuals (92 HF, 43 CAD)...
July 24, 2018: Blood Advances
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