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Saving the endangered blue whale
\"Readers learn what the blue whale is, where it lives, what its life is like, how it communicates, and most important, how to save it from becoming extinct.\"--Provided by publisher.
Book
Blues Music in the Sixties
Can a type of music be \"owned\"? Examining how music is linked to racial constructs and how African American musicians and audiences reacted to white appropriation,Blues Music in the Sixtiesshows the stakes when whites claim the right to play and live the blues.In the 1960s, within the larger context of the civil rights movement and the burgeoning counterculture, the blues changed from black to white in its production and reception, as audiences became increasingly white. Yet, while this was happening, blackness--especially black masculinity--remained a marker of authenticity. Crossing color lines and mixing the beats of B.B. King, Eric Clapton, and Janis Joplin; the Newport Folk Festival and the American Folk Blues Festival; and publications such as Living Blues, Ulrich Adelt discusses these developments, including the international aspects of the blues. He highlights the performers and venues that represented changing racial politics and addresses the impact and involvement of audiences and cultural brokers.
eBook
Early adjunctive methylene blue in patients with septic shock: a randomized controlled trial
Purpose
Methylene blue (MB) has been tested as a rescue therapy for patients with refractory septic shock. However, there is a lack of evidence on MB as an adjuvant therapy, its’ optimal timing, dosing and safety profile. We aimed to assess whether early adjunctive MB can reduce time to vasopressor discontinuation in patients with septic shock.
Methods
In this single-center randomized controlled trial, we assigned patients with septic shock according to Sepsis-3 criteria to MB or placebo. Primary outcome was time to vasopressor discontinuation at 28 days. Secondary outcomes included vasopressor-free days at 28 days, days on mechanical ventilator, length of stay in ICU and hospital, and mortality at 28 days.
Results
Among 91 randomized patients, forty-five were assigned to MB and 46 to placebo. The MB group had a shorter time to vasopressor discontinuation (69 h [IQR 59–83] vs 94 h [IQR 74–141];
p
< 0.001), one more day of vasopressor-free days at day 28 (
p
= 0.008), a shorter ICU length of stay by 1.5 days (
p
= 0.039) and shorter hospital length of stay by 2.7 days (
p
= 0.027) compared to patients in the control group. Days on mechanical ventilator and mortality were similar. There were no serious adverse effects related to MB administration.
Conclusion
In patients with septic shock, MB initiated within 24 h reduced time to vasopressor discontinuation and increased vasopressor-free days at 28 days. It also reduced length of stay in ICU and hospital without adverse effects. Our study supports further research regarding MB in larger randomized clinical trials.
Trial registration
ClinicalTrials.gov registration number
NCT04446871
, June 25, 2020, retrospectively registered.
Journal Article
The blue shark
\"Engaging images accompany information about the blue shark. The combination of high-interest subject matter and narrative text is intended for students in grades 3 through 7\"--Provided by publisher.
Book
g-C.sub.3N.sub.4 quantum dots decorated on urchin-like TiO.sub.2 nanostructures for the photoelectrochemical water splitting
This work employs a straightforward, simple and low-cost method to grow g-C.sub.3N.sub.4 quantum dots (QDs) on a distinctive morphology of urchin-like TiO.sub.2 (u-TiO.sub.2) nanostructures. u-TiO.sub.2 on Ti foil was prepared by the hydrothermal method under the optimized experimental parameters, including hydrothermal time and temperature. Then, for the activation of u-TiO.sub.2 under visible light irradiation, g-C.sub.3N.sub.4 quantum dots (g-C.sub.3N.sub.4 QDs) were decorated on u-TiO.sub.2 by combining a wet pre-coating and subsequent thermal evaporation procedure. The experimental parameters of the process were examined to determine the optimized conditions for the highest photocurrent density (J.sub.ph) in a photoelectrochemical (PEC) cell. g-C.sub.3N.sub.4 QDs were elucidated by transmission electron microscopy (TEM) and diffuse reflectance spectroscopy (DRS). HRTEM results revealed a uniform distribution of anchored g-C.sub.3N.sub.4 QDs on the surface of u-TiO.sub.2 with a mean size of about 10 nm. Optimized decoration of g-C.sub.3N.sub.4 QDs on the u-TiO.sub.2 dramatically enhanced J.sub.ph under simulated sunlight irradiation from 0.06 mA/cm.sup.2 for pristine u-TiO.sub.2 up to 0.12 mA/cm.sup.2 for TiO.sub.2/g-C.sub.3N.sub.4QDs photoanodes under the biased potential of 0.5 V versus Ag/AgCl. Based on the results, the type-II heterostructure of u-TiO.sub.2/g-C.sub.3N.sub.4 facilitates electron-hole separation and charge carrier transfer, thereby improving the PEC performance of the proposed photoanode.
Journal Article
Blue sharks
Introduces readers to facts about blue sharks, including physical features, habitat, life cycle, food, and more.
Book
First-Principles Study on Performance of g-C.sub.3N.sub.4 Self Codoped with C-N Pair as Photocatalyst in Water Splitting Process
This paper theoretically studies the photocatalytic performance of g-C.sub.3N.sub.4 self codoped with C-N pair using first-principles. Calculations show that the system with a N2-C1 pair been replaced is the most stable structure. The difference in PDOS after codoping results from the neutral 2p orbital energy difference between the substitution and original atoms, as well as the change in interaction among all atoms after codoping. The band gap can be reduced by 0.41 eV through self C-N codoping. The visible light absorption ability is obviously enhanced through codoping. Both the CBM and VBM of g-C.sub.3N.sub.4 after codoping are still enough to meet the redox potentials for splitting water. In general, the g-C.sub.3N.sub.4 self codoped with C and N should have good performance as photocatalyst in water splitting process.
Journal Article
Daylight versus pro yellow laser (577 nm) photodynamic therapy mediated with methylene blue (10%) in plane warts: a comparative study
Warts are small, benign growths caused by human papilloma virus (HPV) infection of the skin or mucous membrane. Photodynamic therapy in dermatology is simplified by the accessibility of the skin to light application and allows using any light source with the appropriate spectrum. This study aimed to compare the efficacy and safety of daylight-PDT versus pro yellow laser (577 nm)-PDT mediated by 10% methylene blue (MB) gel in the treatment of plane warts. This prospective comparative study was carried out on 34 patients presented with common warts (≥ 1 warts). Patients were divided into two equal groups by simple randomization process. Group 1: treated with daylight PDT using MB (MB-DL PDT), group 2: treated with Pro yellow laser as PDT using MB. The results of the present study revealed excellent response of warts in 9 patients (52.9%), very good response in 4 patients (23.5%) and poor response in 2 patients (11.8%) of group (1). In group (2), excellent response of the treated warts was observed in 5 patients (29.4%), poor response in 5 patients (29.4%) and no response in 7 patients (41.2%). Daylight-photodynamic therapy (DL-PDT) using MB is an effective treatment, nearly pain free and of convenience to patients. Careful consideration should be given to patient-specific factors such as immune status and previous treatment history. Future research with larger sample sizes, HPV genotyping, and longer follow-up periods is warranted to optimize patient-tailored PDT protocols.
Journal Article