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In the automation process of the garment industry, a notable challenge arises from the presence of flexible materials characterized by irregular shapes, posing difficulties for robotic grasping. This article addresses this challenge by proposing a gripper manipulator centered around the 4 P-RRP quadrilateral cone folding mechanism as the core driving mode, with the angled four-bar linkage mechanism serving as the extension arm. Utilizing screw theory, the developability of the 4 P-RRP four-pyramid mechanism with one degree of freedom is verified, forming the basis for its adoption as the central driving mechanism. Furthermore, an in-depth analysis of the geometric properties of the robot's extension arm leads to the derivation of an optimal folding ratio structure, which is seamlessly integrated into the robot design. Kinematic equations for the mechanism are formulated and solved using the D-H parameter method to obtain the kinematic solution. The investigation demonstrates that the manipulator utilizing the quadrilateral cone folding mechanism significantly enhances adaptability to irregular shapes. By incorporating this proposed mechanism, robots can efficiently manipulate flexible materials across various garment manufacturing applications. [ABSTRACT FROM AUTHOR]

Acer leipoense is a rare and endangered species of the Sapindaceae with a very restricted distribution in Sichuan, China. In this study, the complete chloroplast genome of A. leipoense was characterized by de novo assembly using high-throughput sequencing. The chloroplast genome was 155,702 bp in length; it contained a large single copy region (85,890 bp) and a small single copy region (18,100 bp), which were separated by a pair of 25,856-bp inverted repeat regions. A total of 128 genes were predicted, including 83 protein-coding genes, 37 tRNA genes, and eight rRNA genes. A phylogenetic analysis of 23 chloroplast genome sequences from the genus Acer revealed that A. leipoense was closely related to A. yangbiense. [ABSTRACT FROM AUTHOR]

Coptis omeiensis, as an important Chinese medicinal plant, has been endangered because of overharvesting. To better understand and protect this species, we report the first complete chloroplast genome sequence of C. omeiensis. The chloroplast genome was found to be 154,684 bp in length, and GC content was 38.2%, with large and small single copy regions (LSC with 85,099 bp and SSC with 17,239 bp in length) separated by two Inverted repeat regions (IRs with 26,173 bp). Meanwhile, the sequence contained 113 genes, including 79 protein-coding, 30 tRNA, and 4 rRNA genes. The phylogeny of Ranunculaceae based on the complete cp genomes of 27 related taxa was also presented in this study. [ABSTRACT FROM AUTHOR]

Acer catalpifolium is a rare and endangered species in southwestern China. In this study, the complete chloroplast genome sequence of A. catalpifolium was characterized by de novo assembly using high-throughput sequencing. The length of the whole chloroplast genome was 156,225 bp, containing a large single copy region (LSC) of 85,976 bp and a small single copy region (SSC) of 18,066 bp, which were separated by a pair of 26,092 bp inverted repeat regions (IRs). The sequence contained 135 unique genes, including 40 tRNA, eight rRNA, and 87 protein-coding genes. The overall GC content of the chloroplast genome is 37.9% and those in the LSC, SSC, and IR regions are 36.1%, 32.2%, and 42.9%, respectively. The phylogenetic analysis based on reported chloroplast sequences of Sapindaceae showed that A. catalpifolium is sister to A. miaotaiense, and the genera of Acer and Dipteronia are closely related to Aesculus. [ABSTRACT FROM AUTHOR]

Allium ovalifolium var. leuconeurum is an endemic plant in Southwest China. The complete chloroplast genome sequence of A. ovalifolium var. leuconeurum was generated by de novo assembly using high-throughput sequencing. The length of chloroplast genome was 153,635 bp in length, containing a large-single copy region (LSC) of 82,693 bp, a small-single copy region (SSC) of 17,932 bp, and a pair of inverted repeats (IRa and IRb) regions of 26,505 bp. The genome contains 132 genes, including 86 protein-coding genes, 8 rRNA genes, and 38 tRNA genes. Phylogenetic analysis with the reported chloroplast sequences shows that A. ovalifolium var. leuconeurum is more closely related to Allium prattii, both of which belong to the Sect. Anguinum. [ABSTRACT FROM AUTHOR]

The complete chloroplast genome sequence of Chelidonium majus L. has been presented in this article. The complete chloroplast genome is 159,741 bp in length with 38.7% of GC content, containing a large single copy region (LSC) of 87,698 bp, and a small single copy region (SSC) of 18,573 bp, which were separated by a pair of 26,735 bp inverted repeat regions (IRs). The sequence contained 132 unique genes, including 37 tRNA, 8 rRNA, and 87 protein-coding genes. This plastid genome is the first report for the genus Chelidonium and will be useful data for developing markers for further studies on resolving the relationship within the Papaveraceae. [ABSTRACT FROM AUTHOR]