An ultra-sensitive ammonia sensor based on a quartz crystal microbalance using nanofibers overlaid with carboxylic group-functionalized MWCNTs.

Detecting ammonia at low concentrations is crucial in various fields, including environmental monitoring, industrial processes, and healthcare. This study explores the development and performance of an ultra-sensitive ammonia sensor using carboxylic group-functionalized multi-walled carbon nanotubes (f-MWCNTs) overlaid on polyvinyl acetate nanofibers coated on a quartz crystal microbalance (QCM). The sensor demonstrates high responsiveness, with a frequency shift response of over 120 Hz when exposed to 1.

Translation, Cross-Cultural Adaptation, and Validation of Indonesian Version of Australian Pelvic Floor Questionnaire: An Interviewer-Administered Female Pelvic Floor Questionnaire.

Aim: To adapt and determine the validity and reliability of the Indonesian version of the Australian Pelvic Floor Questionnaire (APFQ).

Methods: The original APFQ was translated and validated to obtain an Indonesian, physician-administered version on 41 urogynecology patients and 41 age-matched women without pelvic floor dysfunction.

Results: Missing answers never exceeded 2%.

Full-zone persistent spin textures with giant spin splitting in two-dimensional group IV-V compounds.

Persistent spin texture (PST), a property of solid-state materials maintaining unidirectional spin polarization in the momentum-space, offers a route to deliver the necessary long carrier spin lifetimes through the persistent spin helix (PSH) mechanism. However, most of the discovered PST locally occurred in the small part around certain high symmetry-points or lines in the first Brillouin zone (FBZ), thus limiting the stability of the PSH state. Herein, by symmetry analysis and first-principles calculations, we report the emergence of full-zone PST (FZPST), a phenomenon displaying the PST in the whole FBZ, in the two-dimensional group IV-VA2B2(= Si, Sn, Ge;= Bi, Sb) compounds.

The effect of the use of commercial tempeh starter on the diversity of Rhizopus tempeh in Indonesia.

At present, only a single Rhizopus species, R. microsporus, can be found in fresh tempeh produced in Java, Indonesia. The loss of diversity of Rhizopus in tempeh has been associated with the widespread use of commercial tempeh starter in Indonesia since the 2000s.

Highly persistent spin textures with giant tunable spin splitting in the two-dimensional germanium monochalcogenides.

The ability to control the spin textures in semiconductors is a fundamental step toward novel spintronic devices, while seeking desirable materials exhibiting persistent spin texture (PST) remains a key challenge. The PST is the property of materials preserving a unidirectional spin orientation in the momentum space, which has been predicted to support an extraordinarily long spin lifetime of carriers. Herein, by using first-principles density functional theory calculations, we report the emergence of the PST in the two-dimensional (2D) germanium monochalcogenides (GeMC).

Coexistence of Midgap Antiferromagnetic and Mott States in Undoped, Hole- and Electron-Doped Ambipolar Cuprates.

We report the first observation of the coexistence of a distinct midgap state and a Mott state in undoped and their evolution in electron and hole-doped ambipolar Y_{0.38}La_{0.62}(Ba_{0.

Paenibacillus cisolokensis sp. nov., isolated from litter of a geyser.

A Gram-stain-positive, endospore-forming, aerobic and thermophilic bacterium, designated strain LC2-13AT, was isolated from Cisolok geyser, West Java, Indonesia, at 50 °C. The isolate was rod-shaped and motile by means of peritrichous flagella. The major cellular fatty acids were iso-C16 : 0, C16 : 0 and anteiso-C15 : 0 and the major quinone was menaquinone 7.

Quasi-free-standing epitaxial graphene on SiC (0001) by fluorine intercalation from a molecular source.

We demonstrated a novel method to obtain charge neutral quasi-free-standing graphene on SiC (0001) from the buffer layer using fluorine from a molecular source, fluorinated fullerene (C(60)F(48)). The intercalated product is stable under ambient conditions and resistant to elevated temperatures of up to 1200 °C. Scanning tunneling microscopy and spectroscopy measurements are performed for the first time on such quasi-free-standing graphene to elucidate changes in the electronic and structural properties of both the graphene and interfacial layer.