Loss Of Segments Research Articles

Study on the influence of the sY1192 gene locus in the AZFb/c region on sperm quality and pregnancy outcome.

Y chromosome microdeletions are an important cause of male infertility. At present, research on the Y chromosome is mainly focused on analyzing the loss of large segments of the azoospermia factor a/b/c (AZFa/b/c) gene, and few studies have reported the impact of unit point deletion in the AZF band on fertility. This study analyzed the effect of sperm quality after sY1192 loss in 116 patients. The sY1192-independent deletion accounted for 41.4% (48/116). Eight patterns were found in the deletions associated with sY1192. The rate of sperm detection was similar in the semen of patients with the independent sY1192 deletion and the combined sY1192 deletions (52.1% vs 50.0%). The patients with only sY1192 gene loss had a higher probability of sperm detection than the patients whose sY1192 gene locus existed, but other gene loci were lost (52.1% vs 32.0%). The hormone levels were similar in patients with sY1192 deletion alone and in those with sY1192 deletion and other types of microdeletions in the presence of the sY1192 locus. After multiple intracytoplasmic sperm injection (ICSI) attempts, the pregnancy rate of spouses of men with sY1192-independent deletions was similar to that of other types of microdeletions, but the fertilization and cleavage rates were higher. We observed that eight deletion patterns were observed for sY1192 microdeletions of AZFb/c, dominated by the independent deletion of sY1192. After ICSI, the fertilization rate and cleavage rate of the sY1192-independent microdeletion were higher than those of other Y chromosome microdeletion types, but there was no significant difference in pregnancy outcomes.

CLINICAL CASE OF RARE SMITH-MAGENIS SYNDROME IN NEWBORN CHILD

Aim. The purpose of the work is a comprehensive analysis of chromosomal pathology based on own detection of a rare clinical case of Smith-Magenis syndrome in a newborn child, the results of which may be useful for the detection and prevention of hereditary diseases. Materials and methods. Based on the analysis of literature data, it was found that clinical cases of rare (SMS) in newborns occur with a frequency of 1 in 25,000–1:15,000. This syndrome is caused by a chromosomal rearrangement that leads to the loss of significant segments of one chromosome from the 17th pair of chromosomes. There is a deletion of genetic material in the region of chromosome 17 (17p11.2), which is why SMS is sometimes called 17p syndrome. In this work, the analysis of clinical symptoms and laboratory-instrumental examinations, the main of which are cytogenetic (karyotyping) and molecular genetic methods, were used to confirm the diagnosis of the disease. The results were obtained during the study of the biological material of the lymphocyte culture of the peripheral blood of the child, mother and father. As a result of the cytogenetic study of the child, the karyotype 46, ХУ, del(17) (p11.2p11.2) was established, that is, a male karyotype with an interstitial deletion in the short arm of chromosome 17 within the band 17p11.2. The mother's karyotype is 46, XX, no chromosomal abnormalities were detected. The father's karyotype is 46, XU, no chromosomal abnormalities were detected. A molecular genetic study of blood leukocytes was conducted to establish the presence of microdeletions/microduplications in the corresponding loci. The result of the study is rsa17p11.2(P245)x1. Chromosome imbalance was established in the form of RAI1, DRC3, LLGL1 gene deletion in the 17p11.2 region, which verifies Smith-Magenis syndrome. Conclusions. In the work, a comprehensive analysis of chromosomal pathology was carried out based on the own detection of a clinical case of a rare Smith-Magenis syndrome in a newborn child. A detailed anamnesis, clinical manifestations, a set of laboratory-instrumental studies, the main ones of which are cytogenetic (karyotyping) and molecular genetic methods, are used for targeted examination, verification of the diagnosis and assessment of disease manifestations. The biological material of the peripheral blood culture (lymphocytes, leukocytes) of the child and parents was used. The results of a comprehensive analysis of chromosomal pathology based on one's own clinical case of the rare Smith-Magenis syndrome in a child of the neonatal period can draw the attention of primary care physicians to the study of syndromes of hereditary diseases and, in the differential diagnosis of patients, direct them to a medical-genetic consultation for cyto- and molecular-genetic studies.

Comparative analysis of tubular retractors and hook retractors in oblique lumbar interbody fusion at the initial stage of the learning curve

PurposeOblique lumbar interbody fusion (OLIF) still has a steep learning curve that many spinal surgeons who want to develop are hesitant. The purpose of this study is to provide reference for beginners through the comparative analysis of the application of two kinds of retraction devices in the early stage of learning curve.MethodWe prospectively included the first 60 patients with lumbar degenerative diseases treated with OLIF by a surgeon in our department. According to the application of different retraction devices during the operation, the patients were divided into hook retractor group and tubular retractor group. The clinical effects and complications of the two groups were compared.ResultThe average age of hook retractor group was 62 years old, the average age of tubular retractor group was 65 years old. There was no significant difference in age, sex, operative segment, follow-up time and blood loss between the two groups. The operation time in hook retractor group was less than that in tubular retractor group. The incidence of complications in hook retractor group (11.8%) was significantly lower than that in tubular retractor group (38.5%).ConclusionThe tubular retractor group has a higher risk of neurovascular injury in the initial stage of learning, as well as the risk of vertebral fracture. In contrast, the hook retractor group has the advantages of simple method, high fault tolerance and relatively low incidence of complications. Therefore, we believe that the application of hook retractor in the early stage of OLIF learning curve is easier to increase the operator’s confidence and make OLIF more acceptable.

Clinical, Genetic, and Histopathological Characteristics of CRX-associated Retinal Dystrophies

PURPOSETo describe phenotypic, genotypic, and histopathological features of inherited retinal dystrophies associated with the CRX gene (CRX-RDs). DESIGNRetrospective multicenter cohort study including histopathology. SUBJECTSThirty-nine patients from 31 families with pathogenic variants in the CRX gene. METHODSClinical data of 152 visits were collected from medical records with a median follow-up time of 9.1 years (IQR, 3.3-15.3 years; range, 0.0-48.8 years). Histopathologic examination of the eye of a 17-year-old patient with advanced early-onset CRX-RD was performed. MAIN OUTCOME MEASURESVisual acuity, retinal imaging, electroretinography (ERG), genotype-phenotype correlation, and histopathological examination were evaluated. RESULTSThe age at onset ranged from birth to the 8th decade of life. Median visual acuity was 1.00 logMAR (IQR, 0.69-1.48 logMAR; range, 0.06-3.00 logMAR) at a mean age of 52.0 ± 19.9 years (range, 4.6-81.9 years). Sufficient imaging was available for 36 out of 39 patients (92.3%), and all showed degeneration of at least the macula. Out of these 36 patients, 22 (61.1%) had only macular dystrophy. Another 10 patients (27.8%) had additional degeneration beyond the vascular arcades, and 4 patients (11.1%) panretinal degeneration. Two patients (5.1%) had Leber congenital amaurosis (LCA). In total, 21 different disease-associated heterozygous CRX variants were identified (10 missense, 8 frameshift, 2 deletion, 1 deletion-insertion variants). Missense variants in the CRX homeodomain and two variants deleting all functional domains, thus causing haploinsufficiency, generally tended to cause milder late-onset phenotypes.Histopathologic examination of the eye of a 17-year-old patient with advanced early-onset retinal dystrophy due to a heterozygous deletion of exons 3 and 4 of the CRX gene revealed loss of laminar integrity and widespread photoreceptor degeneration especially in the central retina, with extensive loss of photoreceptor nuclei and outer segments. CONCLUSIONThis study illustrates the large clinical and genetic heterogenic spectrum of CRX-RDs, ranging from LCA to mild late-onset maculopathy resembling occult macular dystrophy. Haploinsufficiency and missense variants tended to be associated with milder phenotypes. Patients showed degeneration predominantly affecting the central retina on imaging. The histopathological findings also mirror these clinical findings and features similar to previously reported animal models of CRX-RDs.

OCT Biomarkers in Ocular CLN2 Disease in Patients Treated With Intraventricular Enzyme Replacement Therapy.

Bilateral progressive, symmetrical loss of central retinal thickness (CRT) has been described in neuronal ceroid lipofuscinosis type 2 (CLN2) disease. This study details the pattern of morphological changes underlying CRT loss and disease progression in patients receiving intracerebroventricular (ICV) enzyme replacement therapy (ERT) with cerliponase alfa. Spectral-domain optical coherence tomography macular cube scans were collected from 16 patients with classic CLN2 disease receiving ICV ERT. Detailed retinal structure analyses were performed on manually segmented horizontal B-scans through the fovea to determine the thickness of six retinal parameters and the extent of ellipsoid zone (EZ) loss. Anatomical changes primarily occurred in photoreceptor (PR)-related retinal parameters and correlated with ocular disease severity. Retinal degeneration began with initial focal parafoveal EZ discontinuities signaling the onset of rapid PR degeneration in a predictable pattern: parafoveal PR involvement with foveal sparing followed by profound parafoveal and foveal PR loss with additional thinning beyond the central retina. PR degeneration began with outer segment loss and progressed to outer nuclear layer (ONL) involvement. Longitudinal analyses confirmed these observations. The rate of PR loss was fastest at the fovea at ∼58 mm per year and became slower at locations farther away from the fovea. Retinal degeneration in CLN2 disease is primarily associated with PR loss in a predictable pattern, with EZ disruption signaling early PR stress. CRT, ONL thickness, and PR layer thickness are useful anatomical biomarkers for understanding disease progression and treatment efficacy in CLN2. Studies using en face images will further clarify CLN2-related retinal degeneration.

Effects of Exercise-Based Cardiac Rehabilitation on Patients Undergoing Percutaneous Coronary Intervention: A Systematic Review and Meta-Analysis

Objective: This study aims to systematically analyze the impact of exercise-based cardiac rehabilitation on patients undergoing percutaneous coronary intervention (PCI). Methods: We searched for original studies on the effect of exercise-based cardiac rehabilitation on patients undergoing PCI published in domestic and foreign databases such as PubMed, Web of Science, Embase, Cochrane Library, China Knowledge Network (CNKI), and VIP until December 2023. Studies retrieved were screened, and meta-analysis was extracted. The quality of the literature was evaluated; meta-analysis was carried out by RevMan5.4 software (Cochrane Collaboration, Oxford, UK). Results: A total of 1073 sufferers undergoing PCI were included in 11 literatures. Meta-analysis displayed that cardiogenic mortality [risk ratio (RR) = 0.23, 95% confidence interval (CI) (0.08, 0.64)], coronary restenosis rate [RR = 0.59, 95% CI (0.41, 0.87)], revascularization rate [RR = 0.58, 95% CI (0.43, 0.79)], incidence of recurrent angina pectoris [RR = 0.41, 95% CI (0.27, 0.62)], and late lumen loss [RR = –0.60, 95% CI (–0.98, –0.23)] in the trial group, were lower than those in the control group (p < 0.05). No significant difference was found in the recurrence rate of myocardial infarction between the test group and the control group [RR = 0.52, 95% CI (0.22, 1.25)]. Conclusion: Exercise-based cardiac rehabilitation therapy can effectively reduce the risk of major adverse cardio-cerebrovascular events, such as cardiogenic death and coronary restenosis after PCI; it reduces the late lumen loss of the stent coronary segment and has no obvious effect on the recurrence of myocardial infarction. However, this therapy tends to reduce the recurrence rate of myocardial infarction.

Line segment detectors with deformable attention

The object detectors based on Transformers are advancing rapidly. On the contrary, the development of line segment detectors is relatively slow. It is noteworthy that the object and line segments are both 2D targets. In this work, we design a line segment detection algorithm based on deformable attention. Leveraging this algorithm and the line segment loss function, we transform the object detectors, Deformable DETR and ViDT, into end-to-end line segment detectors named Deformable LETR and ViDTLE, respectively. In order to adapt the idea of sparse modeling for line segment detection, we propose a new attention mechanism named line segment deformable attention (LSDA). This mechanism focuses on the valuable positions under the guidance of reference line to refine line segments. We design an auxiliary algorithm named line segment iterative refinement for LSDA. With as few modifications as possible, we transform two object detection detectors, namely SMCA DETR and PnP DETR into competitive line segment detectors named SMCA LETR and PnP LETR, respectively. The experimental results show that the performances of the proposed methods are efficient.

Imprinted DNA methylation of the H19 ICR is established and maintained in vivo in the absence of Kaiso

BackgroundPaternal allele-specific DNA methylation of the imprinting control region (H19 ICR) controls genomic imprinting at the Igf2/H19 locus. We previously demonstrated that the mouse H19 ICR transgene acquires imprinted DNA methylation in preimplantation mouse embryos. This activity is also present in the endogenous H19 ICR and protects it from genome-wide reprogramming after fertilization. We also identified a 118-bp sequence within the H19 ICR that is responsible for post-fertilization imprinted methylation. Two mutations, one in the five RCTG motifs and the other a 36-bp deletion both in the 118-bp segment, caused complete and partial loss, respectively, of methylation following paternal transmission in each transgenic mouse. Interestingly, these mutations overlap with the binding site for the transcription factor Kaiso, which is reportedly involved in maintaining paternal methylation at the human H19 ICR (IC1) in cultured cells. In this study, we investigated if Kaiso regulates imprinted DNA methylation of the H19 ICR in vivo.ResultsNeither Kaiso deletion nor mutation of Kaiso binding sites in the 118-bp region affected DNA methylation of the mouse H19 ICR transgene. The endogenous mouse H19 ICR was methylated in a wild-type manner in Kaiso-null mutant mice. Additionally, the human IC1 transgene acquired imprinted DNA methylation after fertilization in the absence of Kaiso.ConclusionsOur results indicate that Kaiso is not essential for either post-fertilization imprinted DNA methylation of the transgenic H19 ICR in mouse or for methylation imprinting of the endogenous mouse H19 ICR.

Molecular diagnosis of Taenia saginata from two patients in Palestine: two case reports

BackgroundTaeniasis, is a worldwide foodborne zoonotic disease caused by two principal species; Taenia saginata and Taenia solium. The tapeworm infects the intestine causing taeniasis in humans. Taeniasis is a very rare parasitic infection in Palestine with very few annual cases of unknown species. The infection rate and the disease status are not clear due to the lack of reports about the actual number of patients.Case presentationTwo Palestinian patients; one male of 22 years old from Hebron and the other is female of 33 years old from Ramallah were referred to Palestinian Health Services in the West Bank, Palestine, complained of weight loss, abdominal pain and presence of motile segments of creamy color in the their stool. Microscopic analysis of the stool samples from infected cases revealed Taenia eggs and proglottids, confirmed taeniasis infection. The parasite species was identified as T. saginata by polymerase chain reaction (PCR) amplification and sequencing of the cytochrome oxidase -1 (COX-1) gene.ConclusionTaeniasis is an unusual parasitic infection in Palestine, there is a growing concern that the actual numbers of infected individuals are much higher and the occurrence of human taeniasis is principally due to people’s eating habits in consumption of raw or undercooked beef meat. This report highlighted for the first time the existence of taeniasis infection in the country; which necessitates the need to conduct further research and surveillance to reveal the actual infection rate and the available Taenia species.

Nitrile Imines as Peptide and Oligonucleotide Photo-Cross-Linkers in Gas-Phase Ions.

Nitrile imines produced by photodissociation of 2,5-diaryltetrazoles undergo cross-linking reactions with amide groups in peptide-tetrazole (tet-peptide) conjugates and a tet-peptide-dinucleotide complex. Tetrazole photodissociation in gas-phase ions is efficient, achieving ca. 50% conversion with 2 laser pulses at 250 nm. The formation of cross-links was detected by CID-MS3 that showed structure-significant dissociations by loss of side-chain groups and internal peptide segments. The structure and composition of cross-linking products were established by a combination of UV-vis action spectroscopy and cyclic ion mobility mass spectrometry (c-IMS). The experimental absorption bands were found to match the bands calculated for vibronic absorption spectra of nitrile imines and cross-linked hydrazone isomers. The calculated collision cross sections (CCSth) for these ions were related to the matching experimental CCSexp from multipass c-IMS measurements. Loss of N2 from tet-peptide conjugates was calculated to be a mildly endothermic reaction with ΔH0 = 80 kJ mol-1 in the gas phase. The excess energy in the photolytically formed nitrile imine is thought to drive endothermic proton transfer, followed by exothermic cyclization to a sterically accessible peptide amide group. The exothermic nitrile imine reaction with peptide amides is promoted by proton transfer and may involve an initial [3 + 2] cycloaddition followed by cleavage of the oxadiazole intermediate. Nucleophilic groups, such as cysteine thiol, did not compete with the amide cyclization. Nitrile imine cross-linking to 2'-deoxycytidylguanosine was found to be >80% efficient and highly specific in targeting guanine. The further potential for exploring nitrile-imine cross-linking for biomolecular structure analysis is discussed.

Challenges in estimating effective population sizes from metagenome-assembled genomes.

Effective population size (Ne) plays a critical role in shaping the relative efficiency between natural selection and genetic drift, thereby serving as a cornerstone for understanding microbial ecological dynamics. Direct Ne estimation relies on neutral genetic diversity within closely related genomes, which is, however, often constrained by the culturing difficulties for the vast majority of prokaryotic lineages. Metagenome-assembled genomes (MAGs) offer a high-throughput alternative for genomic data acquisition, yet their accuracy in Ne estimation has not been fully verified. This study examines the Thermococcus genus, comprising 66 isolated strains and 29 MAGs, to evaluate the reliability of MAGs in Ne estimation. Despite the even distribution across the Thermococcus phylogeny and the comparable internal average nucleotide identity (ANI) between isolate populations and MAG populations, our results reveal consistently lower Ne estimates from MAG populations. This trend of underestimation is also observed in various MAG populations across three other bacterial genera. The underrepresentation of genetic variation in MAGs, including loss of allele frequency data and variable genomic segments, likely contributes to the underestimation of Ne. Our findings underscore the necessity for caution when employing MAGs for evolutionary studies, which often depend on high-quality genome assemblies and nucleotide-level diversity.

Soft Wearable Body-Powered Hydraulic Actuation System for a Prosthetic Finger Design.

Finger and fingertip loss is the most common form of upper-limb amputation. With a focus on amputations involving the loss of distal and/or partial middle finger segments, this paper outlines the design and development of a novel soft body-powered hydraulically-driven actuation system for a prosthetic finger, while offering an in-depth examination of its subsystems. The proposed device utilises a soft wearable hydraulic mechanism to transfer pressure from the proximal interphalangeal (PIP) joint of the human finger to the distal interphalangeal (DIP) joint of the prosthetic finger, enabling movement of the soft prosthetic DIP joint. The design parameters of the soft actuator, such as its configuration, constituent material, and volume were analysed through experiments with able-bodied participants. Each participant tried 42 different actuators while flexing their index finger, repeating the task four times, yielding 168 trials per participant. The human and prosthetic finger flexion angles and resultant pressures were measured using an Aurora electromagnetic sensor and a fluid pressure transducer. All data was segmented and analysed. Soft actuator designs were selected through statistical analysis of the material (Agilus 30 and Dragon Skin 30), configuration (chambers located underside or around the PIP joint), and volume. The study demonstrated that the selected soft wearable hydraulic mechanism transferred generated pressure from the participant's PIP joint effectively, enabling movement of the prosthetic digit. Our research contributes to current developments in versatile body-powered prosthetic devices, laying the foundations for broad applications in affordable healthcare devices.

CRX haploinsufficiency compromises photoreceptor precursor translocation and differentiation in human retinal organoids

BackgroundThe CRX-associated autosomal dominant retinopathies suggest a possible pathogenic mechanism of gene haploinsufficiency. However, based on reported human patient cases and studies with mouse models, it is hard to confirm the specific weight of haploinsufficiency in pathogenesis due to the interspecies gaps between gene expression and function.MethodsWe created monoallelic CRX by replacing one allele with tdTomato in human embryonic stem cells (hESCs) and subsequently dissect pathogenesis in hESCs-derived retinal organoids. We used transcriptome and immunofluorescence analyses to dissect phenotypic differences between CRX-monoallelic knockout and control wildtype organoids. For location analysis of CRX+ cells, a CRX-expression-tracing system was constructed in control hESCs. We implemented long-term live-cell imaging to describe the translocation of CRX+ cells between two groups in early organoid differentiation. The expression pattern of these dynamic differences was validated using RNA-seq and immunofluorescence assays.ResultsWe identified delayed differentiation of outer nuclear layer (ONL) stratification along with thinner ONL, serious loss of photoreceptor outer segments, as well as downregulated expression of gene for phototransduction and inner/outer segment formation. By live-cell imaging and immunostaining, we observed the overtension of actomyosin network and the arrested translocation of monoallelic CRX+ cells in the early stage of retinal differentiation.ConclusionsWe confirmed that gene haploinsufficiency is the mechanism for the dominant pathogenicity of CRX and discovered that CRX regulated postmitotic photoreceptor precursor translocation in addition to its specification of photoreceptor cell fates during human retinal development. These findings revealed a new underlying mechanism of CRX dominant pathogenesis and provided a new clue for the treatment of CRX-associated human retinopathies.

Interaction of pAsa5 and pAsa8 Plasmids in Aeromonas salmonicida subsp. salmonicida.

The plasmid known as pAsa5 is present in Aeromonas salmonicida subsp. salmonicida, a fish pathogen. The pAsa5 plasmid carries genes that are essential for the bacterium's virulence. Recombination events are known to occur in pAsa5, resulting in the loss of certain segments or the acquisition of additional genetic elements. For example, the transposon carried by the large pAsa8 plasmid was found to be inserted into the pAsa5 plasmid in the SHY16-3432 strain, enabling the addition of antibiotic resistance genes to this plasmid, which does not normally possess any. In this study, we present the isolation of additional strains carrying pAsa8. Further analyses of these strains revealed that a fusion between pAsa5 and the complete version of pAsa8 is possible. The pAsa8 transposon insertion in pAsa5 seen in the SHY16-3432 strain appears to be an aberrant event compared to the fusion of the two full-length plasmids. A 22-nucleotide sequence, present in both plasmids, serves as the site for the fusion of the two plasmids. Moreover, it is possible to introduce pAsa8 through conjugation into naive strains of A. salmonicida subsp. salmonicida and once the plasmid is within a new strain, the fusion with pAsa5 is detectable. This study reveals a previously unexplored aspect of pAsa5 plasmid biology, highlighting an additional risk for the spread of antibiotic resistance genes in A. salmonicida subsp. salmonicida.

A Review on Current Status of Blood Disorder: Thalassemia and its Treatment

The most prevalent hereditary monogenic disorders that claim millions of lives globally are thalassemic syndromes. A thalassemia is an inherited condition, at least one parent must carry the disease's gene. Perhaps a genetic mutation/ defective globin chain or the loss of specific important gene segments is the main cause. Thalassemic illnesses started to strain the healthcare systems of several nations worldwide. Management of thalassemia is now seen as a lifelong treatment that requires continuous monitoring. In this review, we seek to compile and analyze recent research on thalassemia diagnosis and treatment, including papers, studies, and clinical trials. We also intend to present a concise yet comprehensive study. A thalassemia is an inherited condition, at least one parent must carry the disease's gene. Perhaps a genetic mutation/ defective globin chain or the loss of specific important gene segments is the main cause.

Shared and distinct genetic etiologies for different types of clonal hematopoiesis

Clonal hematopoiesis (CH)—age-related expansion of mutated hematopoietic clones—can differ in frequency and cellular fitness by CH type (e.g., mutations in driver genes (CHIP), gains/losses and copy-neutral loss of chromosomal segments (mCAs), and loss of sex chromosomes). Co-occurring CH raises questions as to their origin, selection, and impact. We integrate sequence and genotype array data in up to 482,378 UK Biobank participants to demonstrate shared genetic architecture across CH types. Our analysis suggests a cellular evolutionary trade-off between different types of CH, with LOY occurring at lower rates in individuals carrying mutations in established CHIP genes. We observed co-occurrence of CHIP and mCAs with overlap at TET2, DNMT3A, and JAK2, in which CHIP precedes mCA acquisition. Furthermore, individuals carrying overlapping CH had high risk of future lymphoid and myeloid malignancies. Finally, we leverage shared genetic architecture of CH traits to identify 15 novel loci associated with leukemia risk.

The Fluorescence in situ hybridization (FISH): types and application: a review

The macromolecule identification method known as fluorescence in situ hybridization (FISH) is regarded as a recent development in the study of cytology. It was first created as a physical mapping method to identify genes inside chromosomes. Later, biological and medical studies benefited from the precision and adaptability of FISH. This attractive method offers a level of resolution in between chromosomal studies and DNA analysis. A hybridizing DNA probe used in FISH can either be directly or indirectly labeled. Fluorescent nucleotides are employed in direct labeling, whereas reporter molecules used in indirect labeling are afterwards recognized through affinity molecules, fluorescent antibodies, or other means. An excessively high number of chromosomes in a cell, unique gene fusions, or the loss of a chromosomal segment or an entire chromosome are examples of genetic disorders that can be detected with FISH. It is also used in a variety of scientific projects, including gene mapping and the discovery of fresh oncogenes. This article examines the FISH idea, its use, and its benefits in medical research.

A historical review of 'phossy jaw'

The aim of this article is to stimulate interest and discussion on the pathogenesis of 'phossy jaw'. Historical evidence from newspapers and articles of the time is presented, as other scientific evidence is largely absent. It has stimulated considerable interest in present-day media due to the struggles of nineteenth century reformers to improve working conditions against an apathetic government and weak enforcement of regulation. Those afflicted were often young women who suffered severe pain, loss of segments of jaw, and disfigurement.

Radio map construction based on BERT for fingerprint-based indoor positioning system

Due to the heavy workload of RSS collection, the instability of WLAN signal strength and the disappearance of signals caused by complex indoor environments, the construction of radio map for wireless local area network (WLAN) fingerprint-based indoor positioning system is time-consuming and laborious. In order to rapidly deploy indoor WLAN positioning system, the bidirectional encoder representation from transformers (BERT) model is used to fill the missing signal in radio map and quickly build radio map. The radio map is imported into the BERT model in the form of natural language text, and the missing signal is filled by the BERT model. Since the number of input data in BERT model cannot exceed 512 words, the structure of BERT model is not suitable for WLAN signals with large data volume. Therefore, we redefine the model structure based on the original BERT model and fill in the missing signals in the radio map in parallel. In addition, the loss function is redefined. Except that each segment has a loss function, the weighted average value of all segment loss functions is defined as the total loss function. The experimental results show that the BERT model is better than the traditional linear interpolation method, compressed sensing algorithm and matrix completion algorithm in filling the missing signals in the fingerprint database, and the probability of error within 2 m reaches about 94%.

Analyze the Wear Mechanism of the Longwall Shearer Haulage System.

The wear characteristics and related mechanisms of the Longwall Shearer Haulage System were investigated. Wear is one of the main reasons for failures and downtimes. This knowledge can help solve engineering problems. The research was carried out at a laboratory station and a test stand. The publication presents the results of tribological tests carried out in laboratory conditions. The aim research was to select the alloy intended for casting the toothed segments of the haulage system. The track wheel was made by the forging method using steel 20H2N4A. Haulage System was tested on the ground using a longwall shearer. Selected toothed segments were subjected to tests on this stand. The cooperation of the track wheel and toothed segments in the tootbar were analyzed by a 3D scanner. Debris chemical composition was also appointed, as well as mass loss of toothed segments. The developed solution toothed segment an increase in the service life of the track wheel in real conditions. The results of the research also contribute to reducing the operating costs of the mining process.