Cloning and Characterization of a Novel <i>N</i>-Acetyl-<span style="font-variant: small-caps">D</span>-galactosamine-4-<i>O</i>-sulfate Sulfatase, SulA1, from a Marine <i>Arthroba... by Monica Daugbjerg Christensen, Leila Allahgholi, Javier A. Linares-Pastén, Ólafur Friðjónsson, Hörður Guðmundsson, Varsha Kale, Roya R. R. Sardari, Guðmundur Ó. Hreggviðsson, Eva Nordberg Karlsson

“…The temperature and pH activity profiles (screened using <i>p</i>-nitrocatechol sulfate) were narrow, with an activity optimum at 40–50 °C and a pH optimum at pH 5.5. The <i>T_m</i> was significantly higher (67 °C) than the activity optimum. …”
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Extraction of Melanin in Apricot Kernel Shell and the Optimization of Chelating Process of Its Metal Chelates by Li GAO, Linlin LIU, Panpan LIU, Hongyu XU, Haibin WANG, Haiying LIU, Liu YANG

“…The optimum chelating process of iron melanin chelate was as follows: iron ion concentration 5 mmol/L, pH5.5, reaction for 8 h; The optimum chelating conditions of copper melanin chelate was copper ion concentration 4 mmol/L, pH7.5, reaction for 6 h. …”
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Fritillaria meleagris L. (Liliaceae) in the Kharkiv Region: ecological preferences, conservation problems by O. Bezrodnova, K. Ivanova

“…The soils are moderately aerated, weakly acidic (pH 5.5–6.5), enriched with salts, but with insignificant carbonate content, and often relatively poor in terms of mineral nitrogen. …”
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ẢNH HƯỞNG CỦA PH LÊN MỘT SỐ CHỈ TIÊU SINH LÝ VÀ TĂNG TRƯỞNG TÔM CÀNG XANH (MACROBRACHIUM ROSENBERGII) by Đỗ Thị Thanh Hương, Nguyễn Thị Kim Hà, Bùi Văn Mướp, Nguyễn Thanh Phương

“…Các chỉ tiêu sinh lý như ASTT trong khoảng 373 mOsm/kg đến 430 mOsm/kg; hàm lượng glucose trong máu tăng cao nhất ở nghiệm thức pH=5,5 (12,1-31,6 mg/100 mL) và pH=6,0 (8,43-29,1 mg/100 mL). …”
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Novel Bi-Modular GH19 Chitinase with Broad pH Stability from a Fibrolytic Intestinal Symbiont of <i>Eisenia fetida</i>, <i>Cellulosimicrobium funkei</i> HY-13 by Lu Bai, Jonghoon Kim, Kwang-Hee Son, Chung-Wook Chung, Dong-Ha Shin, Bon-Hwan Ku, Do Young Kim, Ho-Yong Park

“…The highest endochitinase activity of the recombinant enzyme (rChiJ: 30.0 kDa) toward colloidal shrimp shell chitin was found at pH 5.5 and 55 °C and was considerably stable in a wide pH range (3.5–11.0). …”
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Novel poly(diaquabis(1,10-phenanthroline)copper(II)chloride) modified glassy carbon electrode for square wave voltammetric determination of aspirin in tablet samples by Asnakech Mebrie, Meareg Amare, Adane Kassa, Yonas Beyene Yohannes, Alemu Tesfaye, Atakilt Abebe, Tihitina Asmelash

“…Under optimized PBS pH (5.5), and square wave parameters, oxidative peak current response of poly(A2P2CuC)/GCE showed linear dependence on the concentration of aspirin in the range 1–200 ​μM with associated %RSD under 3.7% (n ​= ​3), limit of detection 0.039 ​μM, and limit of quantification and 0.13 ​μM. …”
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Radiation Grafting of a Polymeric Prodrug onto Silicone Rubber for Potential Medical/Surgical Procedures by Hector Magaña, Claudia D. Becerra, Aracely Serrano-Medina, Kenia Palomino, Giovanni Palomino-Vizcaíno, Amelia Olivas-Sarabia, Emilio Bucio, José M. Cornejo-Bravo

“…SR-g-2MBA demonstrated the drug’s sustained and pH-dependent release in simulated physiological mediums (pH = 5.5 and 7.4). The drug’s release was quantified by high-performance liquid chromatography and confirmed by gas chromatography–mass spectrometry. …”
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Molecular network of the oil palm root response to aluminum stress by Fernan Santiago Mejia-Alvarado, David Botero-Rozo, Leonardo Araque, Cristihian Bayona, Mariana Herrera-Corzo, Carmenza Montoya, Iván Ayala-Díaz, Hernán Mauricio Romero

“…Abstract Background The solubilization of aluminum ions (Al3+) that results from soil acidity (pH < 5.5) is a limiting factor in oil palm yield. Al can be uptaken by the plant roots affecting DNA replication and cell division and triggering root morphological alterations, nutrient and water deprivation. …”
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pH-Responsive Liposomes of Dioleoyl Phosphatidylethanolamine and Cholesteryl Hemisuccinate for the Enhanced Anticancer Efficacy of Cisplatin by Hassan Shah, Asadullah Madni, Muhammad Muzamil Khan, Fiaz-ud-Din Ahmad, Nasrullah Jan, Safiullah Khan, Muhammad Abdur Rahim, Shahzeb Khan, Meser M. Ali, Mohsin Kazi

“…In vitro release study of CDDP@PLs at pH 7.4 depicted the lower release rate of cisplatin (less than 40%), and at a pH of 6.5, an almost 65% release rate was achieved compared to the release rate at pH 5.5 (more than 80%) showing the tumor-specific drug release. …”
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Hyperproduction and Thermal Characterization of a Novel Invertase from a Double Mutant Derivative of Kluyveromyces marxianus by Muhammad Ibrahim Rajoka, Shahid Nadeem, Farooq Latif, Muhammad Hafeez-ur-Rahman Memon, Farman Ali Shah, Bushra Niaz, Fatima Jalal, Shaheen Aziz, Muhammad Nawaz

“…The maximum volumetric rate (QP) and invertase yield (YP/S) by M15 mutant were 1222 U/(L·h) and 160 U/g of substrate utilized, respectively (2-fold more than those of parental strain) at 50 °C on the molasses (150 g/L of total fermentable sugars) at pH=5.5. Glucose or sucrose (100, 150 or 170 g/L) did not repress invertase catabolically under the optimized fermentation conditions, contrary to the previous reports on other yeasts and filamentous fungi, where catabolite repression of sugars was predominant. …”
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Preparation and characterization of polymeric cross-linked hydrogel patch for topical delivery of gentamicin by Arshad Javaria, Barkat Kashif, Ashraf Muhammad Umer, Badshah Syed Faisal, Ahmad Zulcaif, Anjum Irfan, Shabbir Maryam, Mehmood Yasir, Khalid Ikrima, Malik Nadia Shamshad, Bin Jardan Yousef A., Nafidi Hiba-Allah, Bourhia Mohammed

“…Polymeric cross-linked hydrogel patches were evaluated for their sol–gel analysis, swelling studies, in vitro drug release studies against pH 5.5, 6.5, and 7.4, ex vivo drug permeation, and the deposition study on the rabbit’s skin by using a Franz diffusion cell. …”
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Temperature- and pH-responsive injectable chitosan hydrogels loaded with doxorubicin and curcumin as long-lasting release platforms for the treatment of solid tumors by Na Li, Na Li, Jianjun Lin, Chunping Liu, Qian Zhang, Riwang Li, Chuang Wang, Chaochao Zhao, Lu Lu, Lu Lu, Changren Zhou, Changren Zhou, Jinhuan Tian, Jinhuan Tian, Shan Ding, Shan Ding

“…The cumulative release ratio was higher at pH = 5.5 than at pH = 7.4 over the first 24 h, during which approximately 10% of the Dox was released, and Cur was released slowly over the following 24–120 h. …”
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دراسة أولية لمعالجة المخلفات السائلة لمعاصر الزيتون (ماء الجفت) باستخدام بعض الأحياء الدقيقة by عيسى كبيبو, تميم عليا

“…حضرت أوساط زرع جرثومية تحتوي على 300mg/l من حمض الكافيك وحمض البروتوكاتيويك كل بمفرده وعند قيمتين لـpH 5.5 و7.0، وتمت عملية الحضن لمدة 24 ساعة عند درجتي حرارة 25°C و35°C. …”
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Fabrication of Ethosomes Containing Tocopherol Acetate to Enhance Transdermal Permeation: In Vitro and Ex Vivo Characterizations by Naheed Akhtar, Naveed Akhtar, Farid Menaa, Walaa Alharbi, Fatima Saad Salem Alaryani, Ali Musfer Alqahtani, Faizan Ahmad

“…An ex vivo permeation study was performed in phosphate-buffered solution (1× PBS; pH 5.5 or pH 7.4) at 37 ± 0.2 °C by using rat abdominal skin and the Franz diffusion cell method. …”
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Spatio-Temporal Variations in Soil pH and Aluminum Toxicity in Sub-Saharan African Croplands (1980–2050) by Yves Uwiragiye, Qahtan Abdul Wahid Khalaf, Hayssam M. Ali, Mbezele Junior Yannick Ngaba, Mingxia Yang, Ahmed S. Elrys, Zhujun Chen, Jianbin Zhou

“…This was indicated by a predicted 3% increase in croplands at risk of aluminum toxicity (soil pH < 5.5) from 66 × 10⁶ ha in 2022 to 78.5 × 10⁶ ha in 2050. …”
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Pre-Harvest MeJA Application Counteracts the Deleterious Impact of Al and Mn Toxicity in Highbush Blueberry Grown in Acid Soils by Jorge González-Villagra, Rocio Pino, Claudio Inostroza-Blancheteau, Paula Cartes, Alejandra Ribera-Fonseca, Marjorie Reyes-Díaz

“…Volcanic ash-derived soils are characterized by low pH (pH ≤ 5.5) with increased concentrations of aluminum (Al³⁺) and manganese (Mn²⁺), which decreases plant growth, fruit quality, and yield. …”
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Synthesis and Characterization of pH-Responsive PEG-Poly(β-Amino Ester) Block Copolymer Micelles as Drug Carriers to Eliminate Cancer Stem Cells by Weinan Li, Jialin Sun, Xiaoyu Zhang, Li Jia, Mingxi Qiao, Xiuli Zhao, Haiyang Hu, Dawei Chen, Yanhong Wang

“…Stronger fluorescence signal of Coumarin-6 (C6) was observed in MS treated by C6-loaded PPM (C6/PPM) at pH 5.5. The tumor inhibition rate and tumor weight of the free DOX and Thz/PPM groups were significantly different from those of the other groups, which free DOX and Thz/PPM effectively suppressed breast tumor growth in vivo. …”
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Nrf2/Keap1-Pathway Activation and Reduced Susceptibility to Chemotherapy Treatment by Acidification in Esophageal Adenocarcinoma Cells by Lucie Storz, Philipp Walther, Olga Chemnitzer, Orestis Lyros, Stefan Niebisch, Matthias Mehdorn, Boris Jansen-Winkeln, Yusef Moulla, Thomas Büch, Ines Gockel, René Thieme

“…OE33 showed a decreased responsiveness towards 5-FU, when the cells were grown in acidic conditions (pH 6 and pH 5.5). Our findings suggest a strong damage of squamous epithelium by gastroesophageal reflux, while Barrett’s dysplasia and EAC cells apparently exert acid-protective features, which lead to a cellular resistance against acid reflux.…”
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Effect of liming, Gafsa rock phosphate and triple superphosphate in early growth and phosphorus uptake in Eucalyptus dunnii Efeito da calagem, do fosfato natural de Gafsa e superfo... by Shizuo Maeda, Itamar Antonio Bognola

“…The treatments consisted of two levels of liming (C0, C1 lime to raise to pH 5.5 in water by pH SMP method), two phosphorus sources (triple superphosphate and Gafsa rock phosphate) and two forms of application of phosphorus sources (incorporated and located). …”
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Highly Efficient Degradation of Sulfisoxazole by Natural Chalcopyrite-Activated Peroxymonosulfate: Reactive Species and Effects of Water Matrices by Wei Zhou, Yu Li, Min Zhang, Guang-Guo Ying, Yong Feng

“…Although the best performance was observed under acidic conditions (pHs 3 and 4), near complete degradation of SIX was also achieved at pH 5.5. Identification of reactive species revealed that both a hydroxyl radical and a sulfate radical were formed in chalcopyrite–PMS oxidation, and they were responsible for the degradation of SIX. …”
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