Search

This paper presents a compact coupling-fed omnidirectional wideband filtering antenna with high selectivity for modern wireless communication systems. The antenna integrates a coupling-fed driven patch with a symmetrical printed Г-shaped dipole, facilitating wideband performance and high selectivity through multiple coupling paths. Coupling-fed structure introduces radiation nulls (RNs), achieving an operating bandwidth of 54.5% for |S11| ≤ −10 dB and out-of-band suppression of −9 dB without requiring additional circuits. Simulations and experiments validate the antenna's performance, demonstrating multiple resonant frequencies and consistent omnidirectional radiation patterns. Compared to traditional designs, it offers superior bandwidth and selectivity, making it suitable for integration into planar RF circuits in applications such as Wi-Fi 6, 5 G, and radar systems. [ABSTRACT FROM AUTHOR]

Laryngocarcinoma is one of the most frequent malignancies occurring in the head and neck. The roles of spindle- and kinetochore-associated complex 1 (SKA1) in the malignant progression of several cancers have already been discussed. However, the precise significance and action's mechanism of SKA1 in laryngocarcinoma remain largely unknown. In this study, SKA1 was shown to be strongly expressed in laryngocarcinoma tissues and cells, and higher expression of SKA1 was associated with more severe tumor infiltration, larger tumor diameter, higher risk of lymphatic metastasis and later pathological stage. Additionally, loss-of-function assays in vitro suggested that SKA1 depletion caused a reduction in cell proliferation, migration, and colony formation as well as an increase in apoptosis. In animal experiments, tumors generated from AMC-HN-8 cells with SKA1 depletion exhibited declined tumor volume and weight. Similarly, the detection of Ki67 protein in xenograft tumor tissues reflected that knocking down SKA1 curbed tumor growth in vivo. Further exploration on downstream mechanism revealed that after treatment with Pifithrin-α, the suppression in proliferation level caused by SKA1 knockdown was reversed, while the increase of cell apoptosis was withdrawn; at the molecular level, Pifithrin-α treatment caused p-P53 and Bax diminished, while Bcl-2 ameliorated. In short, SKA1 promotes the development of laryngocarcinoma via activating the P53 signaling pathway. [ABSTRACT FROM AUTHOR]

Rubus pinfaensis H. Lév. & Vaniot is of great importance in the phylogeny and evolution amongst Rosaceae, genus Rubus L. plants. The chloroplast genome of R. pinfaensis was reported in this study, which is 155,523 bp in size, with an average GC content of 37.13%. The complete chloroplast genome has a typical quadripartite structure, including a large single copy (LSC) region (85,211 bp) and a small single copy (SSC) region (18,718 bp), which were separated a pair of inverted repeats (IRs, 25,797 bp). This plastome contained 129 different genes (112 unique), including 85 protein-coding genes (79 unique), 36 tRNA genes (29 unique), and 8 rRNA genes (4 unique). The chloroplast genome of R. pinfaensis has completed that will be based on the phylogeny and genomic studies in the family Rosaceae, genus Rubus L. [ABSTRACT FROM AUTHOR]

The effects of permeability, initial fluid pressure, effective stress, gas-oil ratio, pressure depletion rate, and oil viscosity on the primary production oil recovery were investigated in detail. The results show that the permeability of tight core is the most significant influence factor. When the permeability decreases from 3.0 × 10−3 µm2 to 0.0021 × 10−3 µm2, the oil and gas recoveries decrease from 45% and 90% to 10% and 20%. Furthermore, the initial fluid pressure also has great influence and the oil recovery linearly increases with the fluid pressure as well as the decrease of effective stress. When the initial fluid pressure increases from 6 MPa to 15 MPa, the oil and gas recoveries can be enhanced about 10% and 22%. Gas-oil ratio is another important parameter. When the gas-oil ratio is 26 m3⋅m−3, the oil recovery can reach approximately 30% compared to 2.7% at the gas-oil ratio of 0. The pressure depletion rate has a more obvious influence on the ultimate oil recovery for the cores with a low permeability, while with a low depletion rate after bubble point can enhance the oil recovery. The work can provide useful information for the choosing of key parameter and development method in tight oil production. [ABSTRACT FROM AUTHOR]

In this paper, we develop a new technique for constructing fuzzy ideals of a semigroup. By using generalized Green's relations, fuzzy star ideals are constructed. It is shown that the new fuzzy ideal of a semigroup can be used to investigate the relationship between fuzzy sets and abundance and regularity for an arbitrary semigroup. Appropriate examples of such fuzzy ideals are given in order to illustrate the technique. Finally, we explain when a semigroup satisfies conditions of regularity. [ABSTRACT FROM AUTHOR]

Rubus setchuenensis Bureau et Franch. is important in phylogeny and evolution amongst genus Rubus L. (Rosaceae) plants. The chloroplast genome of R. setchuenensis reported in this study is 156,231 bp in size, with an average GC content of 37.19%. The complete chloroplast genome has a typical quadripartite structure, including a large single copy (LSC) region (85,829 bp) and a small single copy (SSC) region (18,860 bp), which are separated by a pair of inverted repeats (IRs, 25,771 bp). This plastome contains 129 different genes, including 85 protein-coding genes, 36 tRNA genes, and 8 rRNA genes. The phylogenetic analysis of 20 chloroplast genomes from genera Fragaria, Rosa and Rubus of the family Rosaceae suggested that R. setchuenensis clustered into one clade with the other three species of section Malachobatus Focke, and then grouped with four species of section Idaeobatus Focke, while species from Fragaria and Rosa were classified into a group, separately. [ABSTRACT FROM AUTHOR]

A column experiment was conducted to investigate the responses of root growth and phosphorus (P) efficiency among sweet potatoes—JiHei1 (JH1), NingZi2 (NZ2), SuShu11 (S11) and SuShu17 (S17)—under low P and normal P conditions. Root growth was inhibited by low P in root length and surface area across diameter classes, except for in S17. The P absorption was influenced and led to variations in P content among organs. A high correlation was observed in root dry matter (DM) and P uptake. The tuber DM declined among genotypes under low P, and different P efficiencies were determined. A higher phosphorus utilization efficiency was observed in S11 and S17, suggesting that more P was needed to maintain their normal growth. Physiological efficiency and phosphorus utilization efficiency were significantly positively correlated with the tuber DM, indicating that low P limited the growth of sweet potatoes. These results benefit the production and breeding of sweet potatoes in response to P deficiency. [ABSTRACT FROM AUTHOR]

Periplasmic binding protein-dependent maltose transport system (MBP-MalFGK2) ofEscherichia coli, an important member of the Adenosine triphosphate-binding cassette transporter superfamily, is in charge of the transportation of maltoses across cellular membrane. Studies have shown that this transport processes are activated by the binding of maltose and are accompanied by large-scale cooperative movements between different domains which are mediated by a network of important residues related to signal transduction and allosteric regulation. In this paper, the functionally crucial residues and long-range allosteric pathway of the regulation of the system by substrate were identified by utilising a coarse-grained thermodynamic method proposed by our group. The residues whose perturbations markedly change the binding free energy between maltoses and MBP-MalFGK2were considered to be key residues. In result, the key residues in 62 clusters distributed in different subdomains were identified successfully, and the results from our calculation are highly consistent with experimental and theoretical observations. Furthermore, we explored the long-range cooperation within the transporter. These studies will help us better understand the physical mechanism of the effects of the maltose on MBP-MalFGK2by long-range allosteric modulation. [ABSTRACT FROM PUBLISHER]

Background:Depression is one of the most prevalent mental disorders among older people. Consistent with the Marital Discord Model of Depression (MDMD), research in Western cultures has found that marital distress is one of the risk factors for depression among older adults. However, the effect of marital distress on depression among older adults has not been examined in a collectivistic society, such as China. Objectives:The purpose of this study was to examine the relationship between marital satisfaction and depressive symptoms in a sample of Chinese older adults. Considering the dyadic nature of the data, the Actor–Partner Interdependence Model was used to test for the actor and partner effects. Methods:The study investigated 139 older couples who were recruited from communities in Beijing, the capital of China. The Lock–Wallace Marital Adjustment and the CES-D scales were administered to the participants. Results:The results indicated that neither of the actor effects was significant. One of the partner effects was significant, with the husbands’ marital satisfaction predicting their wives’ depressive symptoms. Conclusions:The MDMD was only partially supported among older couples in China. An asymmetrical pattern of cross-spouse effects was found, suggesting that the husbands’ perception of marital dissatisfaction could significantly predict their wives’ depressive symptoms. [ABSTRACT FROM PUBLISHER]

We consider a system of nonlinear Schrödinger equations with quadratic nonlinearities in two space dimensions. We prove the existence of modified wave operators or wave operators under some mass conditions. [ABSTRACT FROM PUBLISHER]

Motivated by studying fuzzy congruences in groups, semigroups, and ordered semigroups, and as a continuation of N. Kuroki and Y. Tan's works in regular semigroups in terms of fuzzy subsets, in this article we introduce the notions of a fuzzy good congruence relation, a fuzzy cancellative congruence relation on abundant semigroups, and give some properties, and characterizations of fuzzy good congruences on such semigroups. Furthermore, we characterize fuzzy good congruences of left semiperfect abundant semigroups, and get sufficient and necessary conditions for an abundant semigroup to be left semiperfect. [ABSTRACT FROM PUBLISHER]

Schizothorax plagiostomus, a fresh water fish, is an economically important fish of Pakistan. In this study, the complete mitochondrial DNA (mtDNA) sequence ofS. plagiostomuswas explored. The mitogenome length was found to be 16 563bp with 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes and 2 non-coding regions: origin of light-strand replication (OL) and control region (D-loop). All genes were encoded on the heavy strand exceptND6and few tRNA genes. The overall base composition ofS. plagiostomusof the heavy strand was T 25.5%, C 27.0%, A 29.8% and G 17.8%, A + T content 55.3% and G + C content 44.7%. The phylogenetic tree suggests thatS. esocinus, S. progastus, S. richardsoniiandS. plagiostomusmay have closer affinities than other fish of the genusSchizothorax. This mitogenome sequence would be useful for phylogenetic analysis and conservation of this species in Pakistan. [ABSTRACT FROM AUTHOR]

Silicon (Si) fertilization can produce beneficial effect on the Siaccumulator -- wheat (Triticum aestivum L.) grown on low available Si soils. For assessing Si availability in calcareous soils, four extractants were used to select a suitable method and a critical value for Si by correlating the extractable soil Si to the plant Si content and yield response to applied Si fertilizer of winter wheat grown on 17 field experiment plots. The quantities of Si extracted by the tests was, in descending order: 0.025 M citric acid >> buffering NaOAc-HOAc (pH 4) >> 0.19 M Na[SUB2]CO[SUB3] 0.5 M NaHCO[SUB3] (pH 8.5). Both the soil clay and CaCO[SUB3] contents significantly affected the extractable Si amount. All the extractable soil Si by any one of the four extractants was very significantly correlated with the Si contents in both the flag leaf and straw or with the total amount of Si uptake by wheat. The calibration test of relative wheat biomass yield response to Si fertilization showed that the NaOAc-HOAc extraction method was found to be the best for assessing Si availability for winter wheat in the calcareous soils. The critical value of available Si extracted by the classical method (NaOAc-HOAc) widely adopted for the acid and neutral soils was about 80 mg Si kg[SUP-1] (171 mg SiO[SUB2] kg[SUP-1]) in the calcareous soil. [ABSTRACT FROM AUTHOR]

The mitochondrial DNA sequence represents a mainstay of phylogenetics. It allows biologists to elucidate the evolutionary relationships among species. It also permits an examination of the relatedness of populations, hence got importance in the field of biology. The current study was designed to know the mitochondrial sequence ofSchizothorax esocinus, a delicious fish belonging to family Cyprinidae. In this study, the complete mitochondrial genome ofS. esocinusfrom Northern Pakistan was determined. The mitogenome ofS. esocinuswas found to be 16 591 bp in length and consisted of 13 protein coding genes, 22 tRNA genes, two rRNA genes, and one control region. All genes were encoded on heavy strain except ND6 and few tRNA genes. The overall base composition was T 25.5%, C 27.0%, A 29.8% and G 17.7%, A + T content 55.3% and G + C content 47.7%. The length of control region (CR) was 938 bp and contained putative termination-associated sequence (TAS) and several conserved sequence blocks (CSB) and control region also contained a microsatellite region (TA). This is the very first study reported from a reservoir of large cold water bodies in Pakistan which have a great potential for conservation of cold water fish species. This mitogenome sequence would be useful to know the phylogenetic status of the fish. [ABSTRACT FROM AUTHOR]

Schizopygopsis anteroventris(Cyprinidae: Schizothoracinae) is an ecologically and economically important cyprinid endemic to Qinghai-Tibet Plateau, China. In this study, we sequenced the complete mitochondrial genome ofS. anteroventrisby DNA sequencing based on PCR fragments. The mitogenome ofS. anteroventrisis 16,620 in length, containing 13 protein-coding genes, 22 transfer RNA genes, two ribosomal RNA genes and two non-coding regions: the control region (D-loop) and the origin of light-strand replication (OL). The gene order in the mitogenome is identical with common vertebrate form. The complete mitogenome sequence is useful for further genetic studies, phylogenetic analysis and resource protection ofS. anteroventris. [ABSTRACT FROM AUTHOR]

Diptychus maculatus(Cypriniformes: Cyprinidae), the sole species of genusDiptychus, is an economically important freshwater fish widely distributed in Asia. In this study, we first sequenced the complete mitochondrial genome ofD. maculatus.The genome is 16,835 bp in length, consisting of 13 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes as well as 2 non-coding regions: origin of light–strand replication (OL) and control region (D-loop). The gene composition and order are identical with most bony fishes. The overall nucleotide composition of the heavy strand is 27.7% A, 26.7% T, 26.5% C and 19.1% G. The mitogenome data would be useful for further genetics studies, phylogenetic analysis, and resource protection ofD. maculatusand phylogenetic analysis of Schizothoracine fishes. [ABSTRACT FROM AUTHOR]

Herzensteinia microcephalus(Herzenstein, 1891) is the highest naturally occurring cyprinid in the world, and inhabits rivers in the Tibetan Plateau at elevations of 4500–5200 m. Few studies on this species have been contributed. In this study, we got the mitochondrial genome sequences ofH. microcephalus. The mitogenome ofH. microcephalusis16,726 in length, which includes 13 protein-coding genes, 22 tRNA genes, two rRNA genes and two non-coding regions: control region (D-loop) and origin of light-strand replication (OL). The overall nucleotide base composition is 28.41% for A, 27.16% for T, 26.04% for C and 18.38% for G. This study can provide important molecular theory basis for carrying out the study on the genetics, phylogeny and adaptive evolution ofHerzensteinia. [ABSTRACT FROM PUBLISHER]

Chuanchia labiosaHerzenstein, 1891 (Cyprinidae: Schizothoracinae) is the sole species of genusChuanchiaand is endemic to China. This species plays an important role in the upper reaches of the Yellow River and has been listed in both the China Red Data Book of Endangered Animal and the China Species Red List. In this study, the complete mitochondrial DNA genome sequence ofC. labiosawas determined. The mitogenome is 16,705 bp in length, including 13 protein-coding genes, 22 tRNA genes, two rRNA genes, and two non-coding regions. Overall basic composition of mitochondrial genome ofC. labiosais 28.39% for A, 27.16% for T, 26.09% for C, and 18.36% for G with a slightly high A + T content (55.55%). The complete mitogenome sequence ofC. labiosawould be useful for stock evaluation and further conservation genetic studies for this endangered species. [ABSTRACT FROM PUBLISHER]

Platypharodon extremusHerzenstein, 1891 (Cyprinidae: Schizothoracinae), is a monotypic genus species only found in the Qinghai–Tibet plateau of China. Due to human disturbance and related environmental change since the 1950s, the population ofP. extremusdeclined rapidly. As a result, it was listed in the China Red Data Book of Endangered Animal and the China’s Protected Species Priority List. There exist very limited researches done onP. extremus. The poor understanding of this species limits the effective protection on this species. Here, we determined the complete mitochondrial DNA sequence ofP. extremus. The results show that the mitogenome is 16,651 bp in length, which includes 13 protein-coding genes, 22 tRNA genes, two rRNA genes, and two non-coding regions: control region (D–loop) and origin of light-strand replication (OL). These baseline mitogenomic data provided by this study will facilitate the studies onP. extremusin genetics, developmental biology and conservation biology in the future. [ABSTRACT FROM PUBLISHER]

The complete mitochondrial genome of the cotton-melon aphid,Aphis gossypiiGlover, was sequenced using a combination of high-throughput sequencing, traditional PCR amplification, and Sanger sequencing. The genome is 15,869 bp in length, and contains 37 typical coding genes, one non-coding AT-rich region, and a repeat region found exclusively in aphids. The base composition of the genome is A (45.4%), T (38.3%), C (10.4%), and G (5.9%). All protein coding genes start with a typical ATN initiation codon; all genes use the standard termination codon (TAA) exceptND4that ends with a single TA. [ABSTRACT FROM AUTHOR]