On v-adic periods of t-motives

In this paper, we prove the equality between the transcendental degree of the field generated by the v-adic periods of a t-motive M and the dimension of the Tannakian Galois group for M, where v is a "finite" place of the rational function field over a finite field. As an application, we prove the algebraic independence of certain "formal" polylogarithms.Comment: 35 page

〈講演録〉法制度的側面からみたリスク・アセスメント―諸外国の法政策の特徴とリスク概念の関係―

本稿は，2017年2月16日（木曜日）に独立行政法人労働安全衛生総合研究所（厚生労働省所管）が英米の安全衛生を所管する政府機関に所属する専門家と日本の専門家，政府職員を招いて開催した労働安全衛生に関する国際ワークショップにおける筆者の英語による講演内容を文書化したものである

On a conjecture of Furusho over function fields

In the classical theory of multiple zeta values (MZV’s), Furusho proposed a conjecture asserting that the p-adic MZV’s satisfy the same Q-linear relations that their corresponding real-valued MZV counterparts satisfy. In this paper, we verify a stronger version of a function field analogue of Furusho’s conjecture in the sense that we are able to deal with all linear relations over an algebraic closure of the given rational function field, not just the rational linear relations. To each tuple of positive integers s=(s1,…,sr), we construct a corresponding t-module together with a specific rational point. The fine resolution (via fiber coproduct) of this construction actually allows us to obtain nice logarithmic interpretations for both the ∞-adic MZV and v-adic MZV at s, completely generalizing the work of Anderson–Thakur (Ann Math (2) 132(1):159–191, 1990) in the case of r=1. Furthermore it enables us to apply Yu’s sub-t-module theorem (Yu in Ann Math (2) 145(2):215–233, 1997), connecting any ∞-adic linear relation on MZV’s with a sub-t-module of a corresponding giant t-module. This makes it possible to arrive at the same linear relation for v-adic MZV’s

Fulminant Type 1 Diabetes as a Model of Nature to Explore the Role of C-Peptide

Patients with fulminant type 1 diabetes almost completely lack C-peptide even soon after the onset of the disease, and the deficiency continues for the rest of their life. Thus, fulminant type 1 diabetes could serve as a good model of nature to explore the physiological role of C-peptide. For example, patients with fulminant type 1 diabetes have diabetic chronic complications more frequently than those with classical autoimmune type 1 diabetes 5 years after the onset of diabetes, and the higher prevalence could be partly attributable to the complete lack of C-peptide in fulminant type 1 diabetes

On finite Carlitz multiple polylogarithms

In this paper, we define finite Carlitz multiple polylogarithms and show that every finite multiple zeta value over the rational function field $\mathbb{F}_{q}(\theta)$ is an $\mathbb{F}_{q}(\theta)$-linear combination of finite Carlitz multiple polylogarithms at integral points. It is completely compatible with the formula for Thakur MZV's established in [C14].Comment: 8 page

Strict De Novo Methylation of the 35S Enhancer Sequence in Gentian

A novel transgene silencing phenomenon was found in the ornamental plant, gentian (Gentiana triflora × G. scabra), in which the introduced Cauliflower mosaic virus (CaMV) 35S promoter region was strictly methylated, irrespective of the transgene copy number and integrated loci. Transgenic tobacco having the same vector did not show the silencing behavior. Not only unmodified, but also modified 35S promoters containing a 35S enhancer sequence were found to be highly methylated in the single copy transgenic gentian lines. The 35S core promoter (−90)-introduced transgenic lines showed a small degree of methylation, implying that the 35S enhancer sequence was involved in the methylation machinery. The rigorous silencing phenomenon enabled us to analyze methylation in a number of the transgenic lines in parallel, which led to the discovery of a consensus target region for de novo methylation, which comprised an asymmetric cytosine (CpHpH; H is A, C or T) sequence. Consequently, distinct footprints of de novo methylation were detected in each (modified) 35S promoter sequence, and the enhancer region (−148 to −85) was identified as a crucial target for de novo methylation. Electrophoretic mobility shift assay (EMSA) showed that complexes formed in gentian nuclear extract with the −149 to −124 and −107 to −83 region probes were distinct from those of tobacco nuclear extracts, suggesting that the complexes might contribute to de novo methylation. Our results provide insights into the phenomenon of sequence- and species- specific gene silencing in higher plants

〔報文〕非加熱および加熱調理時における高オレイン酸含有ひまわり油の感覚評価

　　Previous research has shown that high oleic sunflower oil (HOSO) that comes from sunflower seeds has high oxidative stability when heated. An article on the sensory characteristics of foods fried in HOSO suggested that they have a light, mild oil flavor. However, the sensory characteristics of HOSO used in foods that have not been fried have not been examined. We therefore investigated the sensory characteristics of HOSO when used in French dressing, mayonnaise, stir-fried foods, and deep-fried foods. For the testing, we used high oleic sunflower oil (89% oleic acid) and rapeseed oil from canola seeds for comparison. The results were as follows. French dressing and mayonnaise were not very greasy, each had a weak aftertaste, and sour and salty flavors were strong. Stir-fried eggplants were evaluated to have a mild oil odor and a light flavor. Stir-fried carrots were highly palatable. Deep-fried foods were highly evaluated as palatable, with a mild oil odor, weak aftertaste, mild greasiness, and a light flavor