Characterization of a simple gas expansion ion source for intense pulses of subthermal molecular ions.

We describe a simple gas expansion ion source based on static discharge voltages and a commercially available pulsed valve. The discharge is initiated by the gas pulse itself between two high voltage electrodes, without the need for fast voltage switches or complex timing schemes. The ion source very reliably produces intense bursts of molecular ions (with currents exceeding 100 μA during the pulse-on phase) with only minor pulse-to-pulse variations in intensity and pulse shape.

Long legs and small joints: The locomotor capabilities of Homo naledi.

24 January 2025: This paper was inadvertently published prematurely before all proof corrections had been finalized. It has been temporarily unpublished while this is rectified.

Prenatal opioid exposure, neonatal abstinence syndrome diagnosis, and child welfare involvement.

Background: Neonatal abstinence syndrome (NAS), or withdrawal from prenatal opioid exposure at birth, can trigger a referral to child protective services (CPS). However, there is some evidence of selection into NAS diagnosis because NAS screening is not universal. Such referrals may protect the infant, help connect the mother to services, or cause harm.

Coronary Artery Calcium Scores After Prophylactic Premenopausal Bilateral Salpingo-Oophorectomy.

Background: Premenopausal risk-reducing salpingo-oophorectomy (RRSO) in women at high familial risk of ovarian cancer leads to immediate menopause. Although early natural menopause is associated with increased cardiovascular disease risk, evidence on long-term cardiovascular disease risk after early surgical menopause is scarce.

Objectives: We sought to determine the long-term influence of the timing of RRSO on the development of coronary artery calcium (CAC), an established marker for cardiovascular disease risk.

Zoonotic Lagochilascaris minor and nine other parasites in a cat.

A case of polyparasitism in an 8-year-old female cat from Southern Brazil is reported. Among the described clinical signs, both gurltiosis and lagochilascariasis are of rare occurrence, being categorized as neglected diseases. The diagnosis of feline crural parasitic paraplegia was established through clinical signs, necropsy lesion observations, and the presence of Gurltia paralysans in histological sections of the spinal cord.