Orchid2024: A cultivar-level dataset and methodology for fine-grained classification of Chinese Cymbidium Orchids.

Background: Chinese Cymbidium orchids, cherished for their deep-rooted cultural significance and significant economic value in China, have spawned a rich tapestry of cultivars. However, these orchid cultivars are facing challenges from insufficient cultivation practices and antiquated techniques, including cultivar misclassification, complex identification, and the proliferation of counterfeit products. Current commercial techniques and academic research primarily emphasize species identification of orchids, rather than delving into that of orchid cultivars within species.

Research Progress for Targeting Deubiquitinases in Gastric Cancers.

Gastric cancers (GCs) are malignant tumors with a high incidence that threaten global public health. Despite advances in GC diagnosis and treatment, the prognosis remains poor. Therefore, the mechanisms underlying GC progression need to be identified to develop prognostic biomarkers and therapeutic targets.

A series of phenyl sulfonate metal coordination polymers as catalysts for one-pot Biginelli reactions under solvent-free conditions.

Three new metal coordination polymers, namely, [Co(DPP)2(H2O)2]·(BS)2·2H2O (1), [Co(DPP)2(H2O)2]·(ABS)2·2H2O (2) and [Co(DPP)2(MBS)2] (3) [DPP = 1,3-di(pyridin-4-yl)propane, BS = phenyl sulfonic acid, ABS = p-aminobenzene sulfonic acid, MBS = p-methylbenzene sulfonic acid] were obtained under hydrothermal conditions. Complexes 1-3 were structurally characterized using X-ray single-crystal diffraction, XRD and IR spectroscopy. Both complexes 1 and 2 display a 1D tape structure.

Metronidazolium perchlorate.

IN THE CRYSTAL STRUCTURE OF THE TITLE COMPOUND [SYSTEMATIC NAME: 1-(2-hy-droxy-eth-yl)-2-methyl-5-nitro-1H-imidazol-3-ium perchlorate], C(6)H(10)N(3)O(3) (+)·ClO(4) (-), the cations are linked by inter-molecular N-H⋯O hydrogen bonds into zigzag chains along the c axis. The cations and anions are connected by O-H⋯O and C-H⋯O hydrogen bonds. A weak intra-molecular C-H⋯O hydrogen bond is also observed.

Naphthalene-2,3-diol-imidazole (1/1).

In the title cocrystal, C(10)H(8)O(2)·C(3)H(4)N(2), inter-molecular O-H⋯O and N-H⋯O hydrogen bonds connect the naphthalene-2,3-diol and imidazole mol-ecules into a two-dimensional supra-molecular framework.

Piperidinium 3-hydr-oxy-2-naphthoate.

The crystals of the title salt, C(5)H(12)N(+)·C(11)H(7)O(3) (-), were obtained from a methanol/water solution of 3-hydr-oxy-2-naphthoic acid and piperidine at room temperature. In the crystal structure, the piperidinium cations display a chair conformation and link with hydroxy-naphthoate anions via N-H⋯O and C-H⋯O hydrogen bonds. An intra-molecular O-H⋯O inter-action is also present.