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https://www.readbyqxmd.com/read/28644985/depressive-like-behavior-is-elevated-among-offspring-of-parents-exposed-to-dim-light-at-night-prior-to-mating
#1
Yasmine M Cissé, Kathryn L G Russart, Randy J Nelson
Rates of major depressive disorder (MDD) have steadily increased over the past 50 years. Many factors have been implicated in the etiology of depressive disorders and environmental influences are being increasingly recognized. The increase in depression rates has coincided with increased artificial nighttime lighting. Exposure to light at night (LAN) has been associated with increased depressive-like behavior in rodents and decreased mood in humans. However, relatively little is known on the multigenerational effects of dLAN on affect...
June 12, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28644493/photoelectrochemical-devices-for-solar-water-splitting-materials-and-challenges
#2
Chaoran Jiang, Savio J A Moniz, Aiqin Wang, Tao Zhang, Junwang Tang
It is widely accepted within the community that to achieve a sustainable society with an energy mix primarily based on solar energy we need an efficient strategy to convert and store sunlight into chemical fuels. A photoelectrochemical (PEC) device would therefore play a key role in offering the possibility of carbon-neutral solar fuel production through artificial photosynthesis. The past five years have seen a surge in the development of promising semiconductor materials. In addition, low-cost earth-abundant co-catalysts are ubiquitous in their employment in water splitting cells due to the sluggish kinetics of the oxygen evolution reaction (OER)...
June 23, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28642913/the-effect-of-petroleum-jelly-light-cured-varnish-and-different-storage-media-on-the-flexural-strength-of-glass-ionomer-dental-cements
#3
Kristina Gorseta, Domagoj Glavina, Tomislav Skrinjaric, Beata Czarnecka, John W Nicholson
This study determined the influence of coating with either petroleum jelly or light-cured varnish and storage medium on the flexural strength of glass-ionomer cements (GIC). The flexural strength of two glass-ionomer cements (Fuji Equia Fil and Ketac Molar Aplicap) was measured. Specimens (2 × 2 × 25 mm) were prepared in three groups: uncoated, coated with petroleum jelly, or coated with light-cured varnish (EquiaCoat) cured for 20 s using a cure lamp (Bluephase G2, Ivoclar Vivadent, Schaan, Liechtenstein)...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28638081/development-of-lysosome-mimicking-vesicles-to-study-the-effect-of-abnormal-accumulation-of-sphingosine-on-membrane-properties
#4
Ana C Carreira, Rodrigo F M de Almeida, Liana C Silva
Synthetic systems are widely used to unveil the molecular mechanisms of complex cellular events. Artificial membranes are key examples of models employed to address lipid-lipid and lipid-protein interactions. In this work, we developed a new synthetic system that more closely resembles the lysosome - the lysosome-mimicking vesicles (LMVs) - displaying stable acid-to-neutral pH gradient across the membrane. To evaluate the advantages of this synthetic system, we assessed the distinct effects of sphingosine (Sph) accumulation in membrane structure and biophysical properties of standard liposomes (no pH gradient) and in LMVs with lipid composition tuned to mimic physiological- or NPC1-like lysosomes...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28637032/investigation-of-an-immediate-effect-of-bright-light-on-oxygen-consumption-heart-rate-cortisol-and-%C3%AE-amylase-in-seasonal-affective-disorder-subjects-and-healthy-controls
#5
Iana A Ivanova, Konstantin V Danilenko, Lyubomir I Aftanas
BACKGROUND: Body (fat) mass has been shown to decrease following bright light treatment for overweight women, irrespective of their seasonal (light) dependence. It is not known if this is due to an (immediate) increase of metabolism. METHODS: Ten women with seasonal affective disorder (SAD) and 10 non-SAD women matched by age, body mass index, and menopausal status participated in a laboratory study in the morning, twice within 1-5 days. During one session, bright light (4,300 lx) was presented for 30 min, and during the other session, red light (250 lx "placebo") was used...
June 22, 2017: Neuropsychobiology
https://www.readbyqxmd.com/read/28633651/epidemiology-of-intestinal-helminthiasis-among-school-children-with-emphasis-on-schistosoma-mansoni-infection-in-wolaita-zone-southern-ethiopia
#6
Bereket Alemayehu, Zewdneh Tomass, Fiseha Wadilo, Dawit Leja, Song Liang, Berhanu Erko
BACKGROUND: Intestinal helminth infections are major parasitic diseases causing public health problems in Ethiopia. Although the epidemiology of these infections are well documented in Ethiopia, new transmission foci for schistosomiasis are being reported in different parts of the country. The objective of this study was to assess the prevalence of Schistosoma mansoni and other intestinal helminth infections among school children and determine the endemicity of schistosomiasis in Wolaita Zone, southern Ethiopia...
June 20, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28632337/non-equilibrium-assembly-of-light-activated-colloidal-mixtures
#7
Dhruv P Singh, Udit Choudhury, Peer Fischer, Andrew G Mark
The collective phenomena exhibited by artificial active matter systems present novel routes to fabricating out-of-equilibrium microscale assemblies. Here, the crystallization of passive silica colloids into well-controlled 2D assemblies is shown, which is directed by a small number of self-propelled active colloids. The active colloids are titania-silica Janus particles that are propelled when illuminated by UV light. The strength of the attractive interaction and thus the extent of the assembled clusters can be regulated by the light intensity...
June 20, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28631885/reliability-and-validity-of-fluorecam-for-white-spot-lesion-detection-an-in-vitro-study
#8
Moufida Abufarwa, Amal Noureldin, Phillip M Campbell, Peter H Buschang
AIM: In the present study, we tested the reliability and validity of a new light fluorescence device, the FluoreCam. METHODS: Twenty-five human teeth were sectioned mesiodistally into halves. Group 1 (n=30) included specimens with either sound enamel or natural white-spot lesions (WSL). Group 2 (n=20) included specimens with sound enamel used to create artificial WSL. Using the FluoreCam, baseline scans of enamel surfaces were obtained under standardized conditions...
June 20, 2017: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/28630910/ferroelastic-modulation-and-the-bloch-formalism
#9
Angelo Mascarenhas, Brian Fluegel, Lekhnath Bhusal
The key to the development of advanced materials is to understand their electronic structure-property relationship. Utilization of this understanding to design new electronic materials with desired properties led to modern epitaxial growth approaches for synthesizing artificial lattices, which for almost half a century have become the mainstay of electronic and photonic technologies. In contrast to previous scalar modulation approaches, we now study synthetic crystal lattices that have a tensor artificial modulation and develop a theory for photons and conduction band states in these lattices in a regime with an unusual departure from the familiar consequences of translational symmetry and Bloch's theorem...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28627206/investigation-on-the-endemic-characteristics-of-metorchis-orientalisin-huainan-area-china
#10
Xiaodong Zhan, Chaopin Li, Hua Wu, Entao Sun, Yuxia Zhu
OBJECTIVE: To investigate the endemic characteristics of Metorchis orientalis (M. orientalis)in the Huainan area, Anhui province, China. METHODS: The first-intermediate host, second-intermediate host and reservoir hosts were collected, and the endemic characteristics of M. orientalis were examined through field investigation and artificial infection. RESULTS: Investigation was completed in 89 domestic ducks, 156 domestic chicken, 41 domestic geese, 20 domestic cats and 19 dogs...
June 5, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28625247/-a-design-and-study-of-a-novel-electronic-device-for-cuff-pressure-monitoring
#11
Shupeng Wang, Wei Li, Wen Li, Dejing Song, Desheng Chen, Jun Duan, Chen Li, Gang Li
OBJECTIVE: To design a novel electronic device for measuring the pressure in the cuff of the artificial airway; and to study the advantage of this device on continuous and intermittent cuff pressure monitoring. METHODS: (1) a portable electronic device for cuff pressure measurement was invented, which could turn pressure signal into electrical signal through a pressure transducer. Meantime, it was possible to avoid pressure leak from the joint and the inside of the apparatus by modified Luer taper and sophisticated design...
June 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28624904/the-effect-of-light-on-bacterial-activity-in-a-seaweed-holobiont
#12
Sergio A Coelho-Souza, Stuart R Jenkins, Antonio Casarin, Maria Helena Baeta-Neves, Leonardo T Salgado, Jean R D Guimaraes, Ricardo Coutinho
Holobionts are characterized by the relationship between host and their associated organisms such as the biofilm associated with macroalgae. Considering that light is essential to macroalgae survival, the aim of this study was to verify the effect of light on the heterotrophic activity in biofilms of the brown macroalgae Sargassum furcatum during its growth cycle. Measurements of heterotrophic activity were done under natural light levels at different times during a daily cycle and under an artificial extinction of natural light during the afternoon...
June 17, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28620256/effects-of-season-and-artificial-photoperiod-on-semen-and-seminal-plasma-characteristics-in-bucks-of-two-goat-breeds-maintained-in-a-semen-collection-center
#13
Francisco Arrebola, José-Alfonso Abecia
AIM: This study quantified the effects of season and photoperiodic treatment on semen and seminal plasma (SP) characteristics in 12 bucks of two Spanish goat breeds (Murciano-Granadina, and Payoya) for the past 1 year. MATERIALS AND METHODS: A total of 6 bucks (three of each breed) were exposed to the natural day length and the other six males (three of each breed) were exposed to alternating conditions of 2 months of long days (16 h light) and 2 months of short days (8 h light)...
May 2017: Veterinary World
https://www.readbyqxmd.com/read/28619035/an-evolutionary-optimization-of-a-rhodopsin-based-phototrophic-metabolism-in-escherichia-coli
#14
Hyun Aaron Kim, Hyun Ju Kim, Jihoon Park, Ah Reum Choi, Kyoo Heo, Haeyoung Jeong, Kwang-Hwan Jung, Yeong-Jae Seok, Pil Kim, Sang Jun Lee
BACKGROUND: The expression of the Gloeobacter rhodopsin (GR) in a chemotrophic Escherichia coli enables the light-driven phototrophic energy generation. Adaptive laboratory evolution has been used for acquiring desired phenotype of microbial cells and for the elucidation of basic mechanism of molecular evolution. To develop an optimized strain for the artificially acquired phototrophic metabolism, an ancestral E. coli expressing GR was adaptively evolved in a chemostat reactor with constant illumination and limited glucose conditions...
June 15, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28617606/rapid-three-dimensional-printing-in-water-using-semiconductor-metal-hybrid-nanoparticles-as-photoinitiators
#15
Amol Ashok Pawar, Shira Halivni, Nir Waiskopf, Yuval Ben-Shahar, Michal Soreni-Harari, Sarah Bergbreiter, Uri Banin, Shlomo Magdassi
Additive manufacturing processes enable fabrication of complex and functional three-dimensional (3D) objects ranging from engine parts to artificial organs. Photopolymerization, which is the most versatile technology enabling such processes through 3D printing, utilizes photoinitiators that break into radicals upon light absorption. We report on a new family of photoinitiators for 3D printing based on hybrid semiconductor-metal nanoparticles. Unlike conventional photoinitiators that are consumed upon irradiation, these particles form radicals through a photocatalytic process...
June 15, 2017: Nano Letters
https://www.readbyqxmd.com/read/28617052/neotomodon-alstoni-mice-present-sex-differences-between-lean-and-obese-in-daily-hypothalamic-leptin-signaling
#16
Moisés Pérez-Mendoza, Dalia Luna-Moreno, Agustín Carmona-Castro, Hugo A Rodríguez-Guadarrama, Luis M Montoya-Gómez, Mauricio Díaz-Muñoz, Manuel Miranda-Anaya
This article compared the effects of spontaneous obesity on the daily profile in the relative amount of the leptin receptor (LepRb), and its output. That is the precursor Pro-opiomelanocortin (POMC) over a 24-hour period and compared with differences in locomotion and food intake in periods of artificial light. Differences between lean and obese mice were examined, as were sex differences. Body weight, food intake and locomotor activity were monitored in freely moving lean and obese mice. Hypothalamic tissue was collected at 5 h, 10 h, 15 h, 19 h and 24 h...
June 15, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28611843/effect-of-artificial-aging-protocols-on-surface-gloss-of-resin-composites
#17
Rafael Santos Rocha, Amanda Carvalho Oliveira, Taciana Marco Ferraz Caneppele, Eduardo Bresciani
The purpose of this study was to evaluate the effect of aging protocols on surface gloss of composites. Cylindrical resin composite specimens (6 mm in diameter, 1 mm thick) were fabricated and divided into three groups (N = 60): microfilled (MiFi), nanohybrid (NaHy), and nanofilled (NaFi). Specimens were distributed into four aging subgroups: thermocycling (5° to 55°C, 15,000 cycles); ethanol immersion (15 days); brushing (10,750 cycles); and light aging (216 h). Surface gloss readings (Novo-Curve, Rhopoint TM, England) were performed at baseline (R0) and after every one-third of aging protocols (R1 to R3)...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28611460/chlorophyll-derivatives-enhance-invertebrate-red-light-and-ultraviolet-phototaxis
#18
Andrea Degl'Innocenti, Leonardo Rossi, Alessandra Salvetti, Attilio Marino, Gabriella Meloni, Barbara Mazzolai, Gianni Ciofani
Chlorophyll derivatives are known to enhance vision in vertebrates. They are thought to bind visual pigments (i.e., opsins apoproteins bound to retinal chromophores) directly within the retina. Consistent with previous findings in vertebrates, here we show that chlorin e6 - a chlorophyll derivative - enhances photophobicity in a flatworm (Dugesia japonica), specifically when exposed to UV radiation (λ = 405 nm) or red light (λ = 660 nm). This is the first report of chlorophyll derivatives acting as modulators of invertebrate phototaxis, and in general the first account demonstrating that they can artificially alter animal response to light at a behavioral level...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28607440/an-arabidopsis-mutant-with-high-operating-efficiency-of-photosystem-ii-and-low-chlorophyll-fluorescence
#19
Niels van Tol, Martijn Rolloos, Dieuwertje Augustijn, A Alia, Huub J de Groot, Paul J J Hooykaas, Bert J van der Zaal
The overall light energy to biomass conversion efficiency of plant photosynthesis is generally regarded as low. Forward genetic screens in Arabidopsis have yielded very few mutants with substantially enhanced photochemistry. Here, we report the isolation of a novel Arabidopsis mutant with a high operating efficiency of Photosystem II (φPSII) and low chlorophyll fluorescence from a library of lines harboring T-DNA constructs encoding artificial transcription factors. This mutant was named Low Chlorophyll Fluorescence 1 (LCF1)...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28607386/maternal-and-early-life-circadian-disruption-have-long-lasting-negative-consequences-on-offspring-development-and-adult-behavior-in-mice
#20
Benjamin L Smarr, Azure D Grant, Luz Perez, Irving Zucker, Lance J Kriegsfeld
Modern life involves chronic circadian disruption through artificial light and these disruptions are associated with numerous mental and physical health maladies. Because the developing nervous system is particularly vulnerable to perturbation, we hypothesized that early-life circadian disruption would negatively impact offspring development and adult function. Pregnant mice were subjected to chronic circadian disruption from the time of uterine implantation through weaning. To dissociate in utero from postnatal effects, a subset of litters was cross-fostered at birth from disrupted dams to control dams and vice versa...
June 12, 2017: Scientific Reports
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