Publications by authors named "Pengfei Fan"

The Chepaizi Uplift, situated on the western edge of the Junggar Basin in northwestern China, has recently become a significant target area for in situ leach sandstone-type uranium exploration. The Neogene Shawan Formation, a newly identified uranium-bearing layer, has gained considerable attention for its potential. This study utilizes scanning electron microscopy (SEM), X-ray powder diffraction (XRD), whole-rock geochemistry, and electron probe microanalysis (EPMA) of uranium minerals.

View Article and Find Full Text PDF

Multiple symmetric lipomatosis, also known as madelung's disease, is a rare syndrome characterized by the accumulation of multiple symmetric subcutaneous adipose tissues that significantly affect patients' quality of life. Since the aetiology of the disease is still unclear, surgical intervention by doctors based on clinical experience is currently the main treatment. However, the recurrence rate remains high even after surgical intervention.

View Article and Find Full Text PDF

is a genus of hazardous pathogens that has caused over 30 outbreaks. However, currently approved therapies are limited in scope, as they are only effective against the Ebola virus and lack cross-protection against other orthoebolaviruses. Here, we demonstrate that a previously isolated human-derived antibody, 2G1, can recognize the glycoprotein (GP) of every orthoebolavirus species.

View Article and Find Full Text PDF
Article Synopsis
  • - The argyrodite family, known for its conductive properties, shows promise as a thermoelectric material due to its diffusive Ag ions and low thermal conductivity, making it an interesting research subject.
  • - This study suggests using the zone melting (ZM) method instead of hot pressing (HP) to create high-density polycrystalline bulk AgSnSe samples, leading to improved thermoelectric properties.
  • - ZM-synthesized samples showed a significant increase in weighted mobility by about 60% and achieved a higher peak thermoelectric value at elevated temperatures, indicating ZM's potential for enhancing performance in this material and potentially others in the argyrodite family.
View Article and Find Full Text PDF

Introduction: Fruit color significantly influences the quality of horticultural crops, which affects phytochemical diversity and consumer preferences. Despite its importance, the genetic basis of the white-colored fruit in tomatoes remains poorly understood.

Methods: In this study, we demonstrate that white-fleshed tomato varieties accumulate fewer carotenoids than yellow-fleshed varieties.

View Article and Find Full Text PDF
Article Synopsis
  • - The study found that the western black crested gibbon didn't split into different subspecies, indicating a lack of genetic diversification.
  • - There is a low level of genetic diversity within this species, which highlights the need for ongoing monitoring due to its vulnerability.
  • - An analysis of the Nomascus genus shows that its ancestral distribution trends from north to south.
View Article and Find Full Text PDF

Despite decades of field study, very little is known about the molecular ecology of gibbons, particularly as it relates to their ability to disperse across degraded and fragmentary landscapes. The critically endangered western black crested gibbon (Nomascus concolor) has been reduced to a small, fragmented population with about 1300 individuals. In the largest population genetic study of free-ranging gibbons to date, we sampled 47 of these gibbons from 13 sites in China and generated 15 polymorphic autosomal microsatellite markers.

View Article and Find Full Text PDF

SARS-CoV-2 has been evolving into a large number of variants, including the highly pathogenic Delta variant, and the currently prevalent Omicron subvariants with extensive evasion capability, which raises an urgent need to develop new broad-spectrum neutralizing antibodies. Herein, we engineer two IgG-(scFv) form bispecific antibodies with overlapping epitopes (bsAb1) or non-overlapping epitopes (bsAb2). Both bsAbs are significantly superior to the parental monoclonal antibodies in terms of their antigen-binding and virus-neutralizing activities against all tested circulating SARS-CoV-2 variants including currently dominant JN.

View Article and Find Full Text PDF

Conducting conservation research and establishing protected areas (PAs) based on research results are critical to biodiversity conservation. However, the effect of research and PAs on conservation of threatened species has rarely been evaluated simultaneously. We collected data on PAs from 2000 for 2021 and determined the number of publications on global primates (published from 1950 to 2021) to assess the effect of PAs, research, and biological and socioeconomic factors on the current International Union for Conservation of Nature endangered status and change in status.

View Article and Find Full Text PDF

Keloids are pathological scar tissue resulting from skin trauma or spontaneous formation, often accompanied by itching and pain. Although GNAS antisense RNA 1 (GNAS-AS1) shows abnormal upregulation in keloids, the underlying molecular mechanism is unclear. The levels of genes and proteins in clinical tissues from patients with keloids and human keloid fibroblasts (HKFs) were measured using quantitative reverse transcription PCR, western blot and enzyme-linked immunosorbent assay.

View Article and Find Full Text PDF
Article Synopsis
  • A study on 22 rhesus macaques in China explored how their space use is influenced by social and environmental factors, using extensive GPS data collected over a year.
  • Findings showed that larger monkey groups traveled longer distances and used bigger home ranges, while their daily path lengths varied with temperature, being longest during mild weather.
  • Additionally, the macaques adjusted their movement patterns based on food availability, traveling less when more flowers and fewer leaves were present, highlighting their adaptability to seasonal resource changes.
View Article and Find Full Text PDF

The Hendra and Nipah viruses (HNVs) are highly pathogenic pathogens without approved interventions for human use. In addition, the interaction pattern between the attachment (G) and fusion (F) glycoproteins required for virus entry remains unclear. Here, we isolate a panel of Macaca-derived G-specific antibodies that cross-neutralize HNVs via multiple mechanisms.

View Article and Find Full Text PDF

Nipah virus (NiV) is a World Health Organization priority pathogen and there are currently no approved drugs for clinical immunotherapy. Through the use of a naïve human phage-displayed Fab library, two neutralizing antibodies (NiV41 and NiV42) targeting the NiV receptor binding protein (RBP) were identified. Following affinity maturation, antibodies derived from NiV41 display cross-reactivity against both NiV and Hendra virus (HeV), whereas the antibody based on NiV42 is only specific to NiV.

View Article and Find Full Text PDF

Jinguanchong deposit, a part of the Mingyuefeng ore field in eastern Hunan Province, China, is a typical perigranitic uranium deposit (a subtype of granite-related deposit) discovered recently with considerable uranium mineralization. Herein, uraninite, the primary ore mineral in the deposit, was investigated via scanning electron microscopy and electron probe microanalysis. Additionally, laser ablation-inductively coupled plasma-mass spectrometry was used for the first time to determine the in situ U-Pb age and the rare-earth element characteristics of uraninite.

View Article and Find Full Text PDF
Article Synopsis
  • Researchers developed boron and nitrogen co-doped ceria-based nanoparticles (B/N-CeFNPs) that emit bright blue fluorescence using a hydrothermal method.
  • These nanoparticles enhance fluorescence for quick detection of the antibiotic chlortetracycline (CTC) and enable a unique ratio fluorescence strategy for oxytetracycline (OTC) detection through specific interactions.
  • B/N-CeFNPs effectively measure CTC and OTC concentrations in milk and honey, allowing for simultaneous detection of multiple tetracyclines in real samples.
View Article and Find Full Text PDF

It has been extensively studied that the gut microbiome provides animals flexibility to adapt to food variability. Yet, how gut phageome responds to diet variation of wild animals remains unexplored. Here, we analyze the eco-evolutionary dynamics of gut phageome in six wild gibbons (Hoolock tianxing) by collecting individually-resolved fresh fecal samples and parallel feeding behavior data for 15 consecutive months.

View Article and Find Full Text PDF

Plant trichome development is influenced by diverse developmental and environmental signals, but the molecular mechanisms involved are not well understood in most plant species. Fruit spines (trichomes) are an important trait in cucumber (Cucumis sativus L.), as they affect both fruit smoothness and commercial quality.

View Article and Find Full Text PDF

The cao vit gibbon (Nomascus nasutus) is one of the rarest primates on Earth and now only survives in a single forest patch of less than 5000 ha on the Vietnam-China border. Accurate monitoring of the last remaining population is critical to inform ongoing conservation interventions and track conservation success over time. However, traditional methods for monitoring gibbons, involving triangulation of groups from their songs, are inherently subjective and likely subject to considerable measurement errors.

View Article and Find Full Text PDF
Article Synopsis
  • Researchers developed a new sensing method for detecting trace amounts of ochratoxin A (OTA) in food using a dual-mode strategy that combines fluorescence and colorimetric detection.
  • The sensing mechanism involves a DNA hydrogel that responds specifically to OTA, causing a change that quells fluorescence signals and allows for the release of hemin, which then forms a G-quadruplex/hemin DNAzyme structure.
  • This detection system showed extremely low limits of detection (3.49 pg/mL for fluorescence and 0.25 ng/mL for colorimetric) and demonstrated effective results in testing actual food samples, highlighting its potential for monitoring food safety.
View Article and Find Full Text PDF

Despite the importance of Nitric Oxide (NO) as signaling molecule in both plant and animal development, the regulatory mechanisms downstream of NO remain largely unclear. Here, we show that NO is involved in Arabidopsis shoot stem cell control via modifying expression and activity of ARGONAUTE 4 (AGO4), a core component of the RNA-directed DNA Methylation (RdDM) pathway. Mutations in components of the RdDM pathway cause meristematic defects, and reduce responses of the stem cell system to NO signaling.

View Article and Find Full Text PDF

Introduction: The SARS-CoV-2 Omicron variant has become the dominant SARS-CoV-2 variant and exhibits immune escape to current COVID-19 vaccines, the further boosting strategies are required.

Methods: We have conducted a non-randomized, open-label and parallel-controlled phase 4 trial to evaluate the magnitude and longevity of immune responses to booster vaccination with intramuscular adenovirus vectored vaccine (Ad5-nCoV), aerosolized Ad5-nCoV, a recombinant protein subunit vaccine (ZF2001) or homologous inactivated vaccine (CoronaVac) in those who received two doses of inactivated COVID-19 vaccines.

Results: The aerosolized Ad5-nCoV induced the most robust and long-lasting neutralizing activity against Omicron variant and IFNg T-cell response among all the boosters, with a distinct mucosal immune response.

View Article and Find Full Text PDF