Diagnosis of small bowel obstruction due to Shine-Muscat grape ingestion: case report.

Introduction: This case report describes a rare instance of small bowel obstruction (SBO) caused by the ingestion of a whole Shine-Muscat grape in a 7-month-old infant. This case adds to the scientific literature by highlighting the potential risk of common fruits, such as grapes, in causing serious gastrointestinal blockages in pediatric patients, which is an uncommon but important consideration for pediatricians and caregivers.

Main Symptoms And Clinical Findings: A 7-month-old female presented with a 3-day history of vomiting, which progressed to bilious vomiting, accompanied by abdominal distension and dehydration.

A Novel Sensitivity Maximization at a Given Specificity Method for Binary Classifications.

In the cancer early detection field, logistic regression is a frequently used approach to establish a combination rule that differentiates cancer from non-cancer. However, the application of logistic regression relies on a maximum likelihood approach, which may not yield optimal combination rules for maximizing sensitivity at a clinically desirable specificity and vice versa. Here, we have developed an improved regression framework, Sensitivity Maximization At a Given Specificity, SMAGS, for binary classification that finds the linear decision rule yielding the maximum sensitivity for a given specificity or the maximum specificity for a given sensitivity.

Mutual exclusivity and co-occurrence patterns of immune checkpoints indicate NKG2A relates to anti-PD-1 resistance in gastric cancer.

Background: An increasing number of clinical studies have begun to explore combination strategies with immune checkpoint inhibitors, aiming to present new opportunities for overcoming anti-PD-1 treatment resistance in gastric cancer. Unfortunately, the exploration of certain immune checkpoint inhibitor combination strategies has yielded suboptimal results. Therefore, it is necessary to comprehensively analyze the expression patterns of immune checkpoints and identify optimal combination regimens of anti-PD-1 inhibitors with other immune checkpoint inhibitors.

Characterizing cancer and COVID-19 outcomes using electronic health records.

Purpose: Patients with cancer often have compromised immune system which can lead to worse COVID-19 outcomes. The purpose of this study is to assess the association between COVID-19 outcomes and existing cancer-specific characteristics.

Patients And Methods: Patients aged 18 or older with laboratory-confirmed COVID-19 between June 1, 2020, and December 31, 2020, were identified (n = 314 004) from the Optum® de-identified COVID-19 Electronic Health Record (EHR) derived from more than 700 hospitals and 7000 clinics in the United States.

Evaluation of a risk assessment model to predict infection with healthcare facility-onset Clostridioides difficile.

Purpose: We evaluated a previously published risk model (Novant model) to identify patients at risk for healthcare facility-onset Clostridioides difficile infection (HCFO-CDI) at 2 hospitals within a large health system and compared its predictive value to that of a new model developed based on local findings.

Methods: We conducted a retrospective case-control study including adult patients admitted from July 1, 2016, to July 1, 2018. Patients with HCFO-CDI who received systemic antibiotics were included as cases and were matched 1 to 1 with controls (who received systemic antibiotics without developing HCFO-CDI).

Multistep nucleation and growth mechanisms of organic crystals from amorphous solid states.

Molecular self-assembly into crystallised films or wires on surfaces produces a big family of motifs exhibiting unique optoelectronic properties. However, little attention has been paid to the fundamental mechanism of molecular crystallisation. Here we report a biomimetic design of phosphonate engineered, amphiphilic organic semiconductors capable of self-assembly, which enables us to use real-time in-situ scanning probe microscopy to monitor the growth trajectories of such organic semiconducting films as they nucleate and crystallise from amorphous solid states.

Origin and mechanism analysis of asymmetric current fluctuations in single-molecule junctions.

The measurements of molecular electronic devices usually suffer from serious noise. Although noise hampers the operation of electric circuits in most cases, current fluctuations in single-molecule junctions are essentially related to their intrinsic quantum effects in the process of electron transport. Noise analysis can reveal and understand these processes from the behavior of current fluctuations.

Label-Free Dynamic Detection of Single-Molecule Nucleophilic-Substitution Reactions.

The mechanisms of chemical reactions, including the transformation pathways of the electronic and geometric structures of molecules, are crucial for comprehending the essence and developing new chemistry. However, it is extremely difficult to realize at the single-molecule level. Here, we report a single-molecule approach capable of electrically probing stochastic fluctuations under equilibrium conditions and elucidating time trajectories of single species in non-equilibrated systems.

Direct observation of single-molecule hydrogen-bond dynamics with single-bond resolution.

The hydrogen bond represents a fundamental interaction widely existing in nature, which plays a key role in chemical, physical and biochemical processes. However, hydrogen bond dynamics at the molecular level are extremely difficult to directly investigate. Here, in this work we address direct electrical measurements of hydrogen bond dynamics at the single-molecule and single-event level on the basis of the platform of molecular nanocircuits, where a quadrupolar hydrogen bonding system is covalently incorporated into graphene point contacts to build stable supramolecule-assembled single-molecule junctions.

Building nanogapped graphene electrode arrays by electroburning.

Carbon nanoelectrodes with nanogap are reliable platforms for achieving ultra-small electronic devices. One of the main challenges in fabricating nanogapped carbon electrodes is precise control of the gap size. Herein, we put forward an electroburning approach for controllable fabrication of graphene nanoelectrodes from preprocessed nanoconstriction arrays.

High-Efficiency Selective Electron Tunnelling in a Heterostructure Photovoltaic Diode.

A heterostructure photovoltaic diode featuring an all-solid-state TiO2/graphene/dye ternary interface with high-efficiency photogenerated charge separation/transport is described here. Light absorption is accomplished by dye molecules deposited on the outside surface of graphene as photoreceptors to produce photoexcited electron-hole pairs. Unlike conventional photovoltaic conversion, in this heterostructure both photoexcited electrons and holes tunnel along the same direction into graphene, but only electrons display efficient ballistic transport toward the TiO2 transport layer, thus leading to effective photon-to-electricity conversion.

[A study of GM (1, 1) model for predicting the incidence trends of pneumoconiosis cases of an area].

Objective: To explore the application of the gray series model GM (1, 1) in predicting trends in the incidence of pneumoconiosis and evaluate its degree of predicted precision.

Methods: Analyzing the incidence of pneumoconiosis in this region from 2009 to 2013, and predicting the incidence of pneumoconiosis of the area in 2014-2016 by establishing GM (1, 1) according to the gray system theory.

Results: Using occupational pneumoconiosis population data from 2009 to 2013, to establish GM (1, 1) model: yt = 1396.

Chorea disclosing a polycythemia vera.

Chorea is a rare complication of polycythemia. We report the case of a 70 year-old woman whose polycythemia vera (PV), with Janus Kinase-2 (JAK2) mutation, presented as chorea. Chorea resolved quickly after hydroxyurea therapy.

[Risk factors of recurrent spontaneous abortion].

Recurrent spontaneous abortion (RSA) has various complicated causes, and more and more researches are focused on its etiology. Genetic factors are the most common risk factors of RSA; immune factors, infection factors, male factors and female factors play an important role; environmental pollution and some other unknown factors may also be conspirators. This article presents an overview on the possible risk factors of RSA.

[Progesterone and its receptor in male reproduction].

Progesterone, as a female hormone, plays an important role in the physiological function and pregnancy maintenance in women. Recent studies show that progesterone and its receptor are also involved in male reproduction, and its receptor mRNA exists in male sexual glands. It is believed that progesterone, binding to its receptor, can regulate spermatogenesis and improve the fertilization of sperm, while the sperm from those with oligospermia, asthenozoospermia, teratospermia or unexplained infertility exhibit a low fertility due to the deficient expression of the progesterone receptor and insensitive reaction to progesterone.

MiR-183 family regulates chloride intracellular channel 5 expression in inner ear hair cells.

The roles of miRNAs in the onset of hearing and deafness are beginning to be revealed. Although there has been no reported link between chloride intracellular channel 5 (CLIC5) and the miR-183 family to date, we here present evidence that they are co-expressed in the inner ear and have functions that are related to stereocilia. Moreover, CLIC5 contains a single predicted and highly conserved miR-96/-182 binding site within its 3'-UTR.

[Effect of phosphatidylinositol 3-kinase/serine-threonine kinase signalling pathway during the proliferation process of HL-60 cells exposed to benzoquinone].

Objective: To explore the effects of phosphatidylinositol 3-kinase/Serine-threonine kinase (PI3K/Akt) signal pathway on the proliferation of HL-60 cells exposed to benzoquinone (BQ).

Methods: HL60 cells were divided into 3 groups: control group (treated with PBS), BQ group (treated with 3 micromol/L BQ) and LY294002 plus BQ group (treated with 20 micromol/L LY294002 plus 3 micromol/L BQ). The cell proliferation was measured with alamar blue dye assay.

[Effects of SOD2 and its C47T mutation on oxidative injury in cochlea hair cell].

Objective: To study the effect of SOD2 and its C47T mutation on oxidative injury in cochlea hair cells.

Methods: HEI-OC1 cells were transfected with the SOD2 of Ala16 and Vla16. Cells' proliferation ability was determined by MTT assay.