Vol. 4 No. 03 (2025): HPU2.Nat.Sci.Tech

Natural Sciences and Technology

• On the spectral radius of bipartite graphs with bounded partite sets

  Phi-Dung Hoang

  3-10

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• A finiteness theorem for ends of weighted manifolds with a weighted Poincaré inequality

  Tuan-Dung Ha

  11-25

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• The synthesis of \(\text{TiO}_2\) nanosheets and their outperformance in the photocatalytic degradation of methylene blue

  Duc-Nam Cao, Ba-Trang Doan, Van-Tuan Mai, Dinh-Lam Nguyen, Duy-Khanh Nguyen, Minh-Quy Bui, Xuan-Dung Mai

  26-33

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• The sequential Cohen-Macaulayness of idealizations

  Van-Loc Phan , Minh-Son Doan

  34-41

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• An identification problem governed by nonlinear fractional mobile-immobile equation, Part II: Stability and Regularity

  Van-Tuan Tran, Thi-Thu Tran , Van-Dac Nguyen

  42-50

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• Study on content of hydrophilic silica from rice husk in reinforced deproteinized natural rubber materials

  Dai-Luat Tran, Manh-Thanh Tran, Thi-Hang Le, Van-Hoang Nguyen, Thanh-Binh Bui Thi, Nhat-Trang Nguyen, Hong-Nhung Le Thi, Trung-Nghia Phan

  51-63

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• The efficient and mild synthesis of phenacyl bromide via bromination using N-bromosuccinimide catalyzed by brønsted acidic ionic liquid under ultrasound irradiation

  Cong-Thang Duong, Minh-Duong Ho, Que-Tran Tran Thi, Xuan-Thi Luu Thi

  64-71

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• Genetic diversity of Shan tea (Camellia sinensis var. assamica) from Cao Son Commune, Lao Cai province using RAPD-PCR

  Thuy-Lien Bui, Thi-Thuong Ngo, Xuan-Phong Ong, Van-Thiep Nguyen, Thi-Xuyen Ngo, Viet-Hong La

  72-79

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• Quadratic programming and quadratically constrained quadratic programming: theory, algorithms, and applications

  Kim-Thuy Dinh Thi

  80-96

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• Phase transitions and thermodynamic properties of the reissner-nordström black hole in (n + 1) dimensional spacetime

  Van-Quyet Hoang, Khanh-Linh Nguyen, Thi-Trang Nguyen

  97-104

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